The present invention relates to non-woven fabric laminates, stretchable nonwoven fabric laminates, textile products, absorbent articles and sanitary masks.
Background technology
[0002]
　In recent years, non-woven fabrics have been widely used in various applications because of their excellent breathability and flexibility. Therefore, the non-woven fabric is required to have various properties according to its use, and is also required to improve the properties.
[0003]
　For example, non-woven fabrics used for sanitary materials such as disposable diapers and sanitary napkins, and base cloths for poultices are required to have water resistance and excellent moisture permeability. It is also required to have elasticity and bulkiness depending on the place where it is used.
[0004]
　As one of the methods for imparting elasticity to the non-woven fabric, a method of using a thermoplastic elastomer as a raw material of the spunbonded non-woven fabric (for example, Patent Document 1; Japanese Patent Application Laid-Open No. 7-503502), thermoplastic as a fiber for forming the non-woven fabric. A method using a mixed fiber of a fiber made of polyurethane and a fiber made of a thermoplastic polymer (for example, Patent Document 2; Japanese Unexamined Patent Publication No. 2004-244791), a long fiber of a thermoplastic elastomer and thermoplastic as a laminated structure for forming a non-woven fabric. A method of using at least two layers having different fiber mixing ratios with the long fibers of the resin (for example, Patent Document 3: International Publication No. 2008/108230), and hydrogen, although the purpose is different from imparting elasticity. Various long-fiber non-woven fabrics (for example, Patent Document 4; Japanese Unexamined Patent Publication No. 2004-197291) made by mixing adhesive fibers composed of an added styrene block copolymer and the like with non-adhesive fibers have been proposed. There is.
　Further, in the manufacturing process of sanitary materials such as disposable diapers and sanitary napkins, the non-woven fabrics may be heat-sealed and bonded to each other. If an attempt is made to shorten the sealing time in the heat sealing process for the purpose of speeding up the production, there arises a problem that the sealing strength is lowered. When the sealing temperature is raised, there arises a problem that the sealing portion becomes hard. Therefore, there is a strong demand for a non-woven fabric that can be heat-sealed at as low a temperature as possible while maintaining a flexible texture.
　However, depending on the application, a non-woven fabric laminate having both good expansion and contraction characteristics and low-temperature heat-sealing property is still desired.
[0005]
　　[Patent Document 1]
　　Japanese Patent Application Laid-Open No. 7-503502 [Patent Document 2] Japanese Patent Application Laid-Open No. 2004-244791
　　[Patent Document 3] International Publication No. 2008/108230
　　[Patent Document 4] Japanese Unexamined Patent Publication No. 2004-197291
Outline of the invention
Problems to be solved by the invention
[0006]
　An object of the present disclosure is to provide a non-woven fabric laminate having both good stretchability and low-temperature heat-sealing property, and a stretchable non-woven fabric laminate using the same, a textile product, an absorbent article, and a sanitary mask.
Means to solve problems
[0007]
　Means for solving the above problems include the following aspects.
　<1> A front surface layer, an intermediate layer, and a back surface layer are provided in this order, and the
　front surface layer and the back surface layer are independently made of long fibers of a thermoplastic polyurethane-based elastomer (A) and a thermoplastic resin (B). ) is a spunbonded nonwoven layer containing a long fiber,
　the intermediate layer is a spunbonded nonwoven fabric layer comprising at least 50 wt% long fiber of the thermoplastic polyurethane elastomer (a),
　the thermoplastic polyurethane elastomer ( A non-woven laminate in which the storage elasticity of A) and the storage elasticity of the thermoplastic polyurethane-based elastomer (a) are independently 25.0 MPa or less.
　<2> The nonwoven fabric laminate according to <1>, wherein the intermediate layer is a spunbonded nonwoven fabric layer containing 80% by mass or more of the long fibers of the thermoplastic polyurethane elastomer (a).
　<3> The nonwoven fabric laminate according to <1> or <2>, wherein the melting point of the thermoplastic polyurethane elastomer (A) and the melting point of the thermoplastic polyurethane elastomer (a) are independently 165 ° C. or lower.
　<4> Any one of <1> to <3> in which the heat of fusion of the thermoplastic polyurethane-based elastomer (A) and the heat of fusion of the thermoplastic polyurethane-based elastomer (a) are independently 14 mJ / mg or less. The non-woven laminate according to.
　<5> The mixed fiber mass ratio of the long fibers of the thermoplastic polyurethane-based elastomer (A) and the long fibers of the thermoplastic resin (B) in the front surface layer or the back surface layer is 10:90 to 60:40 ( However, the non-woven fabric laminate according to any one of <1> to <4>, wherein (A) + (B) = 100% by mass).
　<6> The nonwoven fabric laminate according to <5>, wherein the mixed fiber mass ratio is 50:50 to 60:40 in terms of mass ratio.
　<7> The nonwoven fabric laminate according to any one of <1> to <6>, wherein the thermoplastic resin (B) contains a propylene-based polymer.
　<8> The thermoplastic resin (B) is composed of a propylene-based polymer and high-density polyethylene, and the content of the propylene-based polymer is 80 mass by mass with respect to the total of the propylene-based polymer and the high-density polyethylene. % To 99% by mass, and the content of the high-density polyethylene is any of <1> to <7>, which is 1% by mass to 20% by mass with respect to the total of the propylene-based polymer and the high-density polyethylene. The non-woven laminate according to one.
　<9> A stretchable nonwoven fabric laminate obtained by stretching the nonwoven fabric laminate according to any one of <1> to <8>.
　<10> A textile product containing the nonwoven fabric laminate according to any one of <1> to <8> or the stretchable nonwoven fabric laminate according to <9>.
　<11> An absorbent article containing the nonwoven fabric laminate according to any one of <1> to <8> or the stretchable nonwoven fabric laminate according to <9>.
　<12> A sanitary mask containing the nonwoven fabric laminate according to any one of <1> to <8> or the stretchable nonwoven fabric laminate according to <9>.
The invention's effect
[0008]
　According to the present disclosure, a non-woven fabric laminate having both good stretchability and low-temperature heat-sealing property, and a stretchable non-woven fabric laminate using the same, a textile product, an absorbent article, and a sanitary mask are provided.
A brief description of the drawing
[0009]
FIG. 1 is a schematic view of a gear stretching device.
Mode for carrying out the invention
[0010]
　In the present disclosure, the numerical range represented by using "-" means a range including the numerical values ​​before and after "-" as the lower limit value and the upper limit value.
　Further, in the present disclosure, the long fiber means a fiber having a fiber length of 30 mm or more.
[0011]
　[Non-woven laminate]
　The non-woven laminate of the present disclosure has a front surface layer, an intermediate layer, and a back surface layer in this order, and the front surface layer and the back surface layer are independently thermoplastic polyurethane-based elastomer (A). ) Is a spunbonded non-woven layer containing the long fibers of the thermoplastic resin (B), and the intermediate layer is a spunbonded non-woven layer containing 50% by mass or more of the long fibers of the thermoplastic polyurethane elastomer (a). The storage elastic coefficient of the thermoplastic polyurethane-based elastomer (A) and the storage elastic coefficient of the thermoplastic polyurethane-based elastomer (a) are independently 25.0 MPa or less. The non-woven fabric laminate of the present disclosure may have layers other than the front surface layer, the intermediate layer, and the back surface layer.
　Hereinafter, the composition for forming the spunbonded nonwoven fabric layer of the present disclosure will be described.
[0012]
　
　The thermoplastic polyurethane-based elastomer (A) which is one of the fiber components forming the front surface layer and the back surface layer of the spunbonded non-woven fabric according to the present disclosure. As the thermoplastic polyurethane-based elastomer (A) used as a raw material for the long fibers of the above, various known thermoplastic polyurethane-based elastomers can be used, and two or more types of thermoplastic polyurethane-based elastomers may be used in combination.
　Further, a preferred embodiment of the long fibers of the thermoplastic polyurethane-based elastomer (a), which is one of the fiber components forming the intermediate layer of the spunbonded nonwoven fabric according to the present disclosure, is the long fibers of the thermoplastic polyurethane-based elastomer (A). A preferred embodiment can be appropriately applied. The long fibers of the thermoplastic polyurethane elastomer (a) forming the intermediate layer may be the same as or different from the long fibers of the thermoplastic polyurethane elastomer (A) forming the front surface layer and the back surface layer. ..
　Hereinafter, in the spunbonded non-woven fabric according to the present disclosure, those using at least two types of resin and elastomer are also referred to as “blended fiber spunbonded non-woven fabric”.
[0013]
　In the present disclosure, the thermoplastic polyurethane-based elastomer is, for example, a soft segment in which at least polyurethane forms pseudo-crosslinks by physical aggregation, and other polymers are amorphous and have a low glass transition temperature. Examples of the material forming the.
　Specific examples of the thermoplastic polyurethane-based elastomer include the polyurethane-based thermoplastic elastomer (TPU) specified in JIS K6418: 2007.
[0014]
　The storage elastic modulus of the thermoplastic polyurethane-based elastomer (A) according to the present disclosure is 25.0 MPa or less. The storage elastic modulus according to the present disclosure indicates the storage elastic modulus at 23 ° C. The storage elastic modulus at 23 ° C. is also hereinafter referred to as “E'@ 23 ° C.”.
　When the storage elastic modulus of the thermoplastic polyurethane elastomer (A) exceeds 25.0 MPa, the stretch characteristics of the non-woven fabric laminate tend to deteriorate. From the viewpoint of improving the stretchability of the non-woven fabric laminate, the storage elastic modulus of the thermoplastic polyurethane elastomer (A) is preferably 22.0 MPa or less, more preferably 18.0 MPa or less.
　The storage elastic modulus of the thermoplastic polyurethane elastomer (A) can affect the stretch characteristics of the non-woven fabric laminate even in the front surface layer and the back surface layer.
[0015]
　The storage elastic modulus of the thermoplastic polyurethane elastomer (A) used in the nonwoven fabric laminate of the present disclosure can be measured by the following devices and conditions.
Equipment: RSA-III (manufactured by TI Instruments)
Deformation mode: Tension mode
Temperature range: -20 ° C to 120 ° C
Temperature rise rate: 2 ° C / min
Deformation frequency: 10Hz
Initial strain: 0.1%
measurement Temperature sensation: 0.3 ° C
Environment: Under nitrogen atmosphere
[0016]
　The melting point of the thermoplastic polyurethane-based elastomer (A) used in the non-woven fabric laminate of the present disclosure is raised at 10 ° C./min after being held at −100 ° C. for 5 minutes under a differential scanning calorimeter (DSC) using a differential scanning calorimeter (DSC). It is defined as the peak top of the peak observed on the hottest side of the melting endothermic curve obtained by heating. Specifically, using a differential scanning calorimeter (DSC-7, manufactured by PerkinElmer), 5 mg of the sample was held at -100 ° C for 5 minutes in a nitrogen atmosphere, and then the temperature was raised at 10 ° C / min. It can be obtained as the peak top of the peak observed on the highest temperature side of the obtained melt endothermic curve.
　The melting point of the thermoplastic polyurethane elastomer (A) used in the nonwoven fabric laminate of the present disclosure is preferably 165 ° C. or lower, more preferably 163 ° C. or lower, from the viewpoint of improving the low temperature heat sealability.
[0017]
　The heat of fusion of the thermoplastic polyurethane elastomer (A) used in the non-woven laminate of the present disclosure is 10 ° C./min after being held at −100 ° C. for 5 minutes under a differential scanning calorimeter (DSC) using a differential scanning calorimeter (DSC). It is defined as the amount of heat of fusion at the largest endothermic peak of the melting endothermic curve obtained by raising the temperature. Specifically, using a differential scanning calorimeter (DSC-7, manufactured by PerkinElmer), 5 mg of the sample was held at -100 ° C for 5 minutes in a nitrogen atmosphere, and then the temperature was raised at 10 ° C / min. It can be obtained from the largest endothermic peak among the obtained melt endothermic curves.
　The calorific value of the thermoplastic polyurethane elastomer (A) used in the nonwoven fabric laminate of the present disclosure is preferably 14.0 mJ / mg or less, more preferably 12.0 mJ / mg or less, from the viewpoint of improving the low-temperature heat-sealing property. be.
[0018]
　Among the thermoplastic polyurethane-based elastomers (A) according to the present disclosure, a thermoplastic polyurethane-based elastomer having a solidification start temperature of preferably 65 ° C. or higher, more preferably 75 ° C. or higher, and even more preferably 85 ° C. or higher may be used. The upper limit of the solidification start temperature of the thermoplastic polyurethane elastomer is preferably 195 ° C. Here, the solidification start temperature is a value measured using a differential scanning calorimeter (DSC), and the thermoplastic polyurethane elastomer was heated to 230 ° C. at 10 ° C./min and held at 230 ° C. for 5 minutes. After that, it is the start temperature of the exothermic peak derived from the solidification of the thermoplastic polyurethane elastomer generated when the temperature is lowered at 10 ° C./min. When the solidification start temperature is 65 ° C. or higher, it is possible to suppress molding defects such as fusion of fibers, thread breakage, and resin lumps when obtaining a mixed fiber spunbonded non-woven fabric, and at the time of thermal embossing. It is possible to prevent the molded mixed fiber spunbonded non-woven fabric from wrapping around the embossing roller. Further, the obtained mixed fiber spunbonded non-woven fabric is also less sticky, and is preferably used for materials that come into contact with the skin, such as clothing, sanitary materials, and sports materials. On the other hand, by setting the solidification start temperature to 195 ° C. or lower, the molding processability can be improved. The solidification start temperature of the molded fiber tends to be higher than the solidification start temperature of the thermoplastic polyurethane elastomer used for this.
[0019]
　In order to adjust the solidification start temperature of such a thermoplastic polyurethane elastomer to 65 ° C. or higher, each of the polyol, isocyanate compound and chain extender used as a raw material of the thermoplastic polyurethane elastomer has an optimum chemical structure. You need to choose one and adjust the amount of hard segments. Here, the amount of hard segment is the mass obtained by dividing the total mass of the isocyanate compound and the chain extender used in the production of the thermoplastic polyurethane elastomer by the total amount of the polyol, the isocyanate compound and the chain extender and multiplying by 100. It is a percentage (mass%) value. The amount of the hard segment is preferably 20% by mass to 60% by mass, more preferably 22% by mass to 50% by mass, and further preferably 25% by mass to 48% by mass.
[0020]
　The number of particles of the polar solvent-insoluble component of the thermoplastic polyurethane elastomer is preferably 3 million particles / g or less, more preferably 2.5 million particles / g or less, and further preferably 2 million particles / g or less. Here, the polar solvent insoluble component in the thermoplastic polyurethane-based elastomer is mainly a lump of fish eyes, gel, or the like generated during the production of the thermoplastic polyurethane-based elastomer. The lump is a thermoplastic polyurethane elastomer such as a component derived from a hard segment agglomerate of a thermoplastic polyurethane elastomer and a component in which a hard segment and / or a soft segment is crosslinked by an allophanate bond, a bullet bond, or the like. It is a raw material constituting the above and a component generated by a chemical reaction between the raw materials.
[0021]
　The number of particles of the polar solvent insoluble matter is determined by measuring the particle size distribution of the insoluble matter when the thermoplastic polyurethane elastomer is dissolved in a dimethylacetamide solvent (hereinafter, abbreviated as "DMAC") by using the pore electric resistance method. It is a value measured by attaching a 100 μm solvent to the surface. When a 100 μm aperture is attached, the number of particles of 2 μm to 60 μm in terms of uncrosslinked polystyrene can be measured.
[0022]
　By reducing the number of particles insoluble in the polar solvent to 3 million or less per 1 g of the thermoplastic polyurethane elastomer, the distribution of fiber diameters can be increased within the solidification start temperature range of the thermoplastic polyurethane elastomer, and during spinning. Problems such as thread breakage can be further suppressed. Further, from the viewpoint of suppressing the mixing of air bubbles in the strands or the occurrence of thread breakage in the molding of the non-woven fabric by the large spunbond molding machine, the water value of the thermoplastic polyurethane elastomer is preferably 350 ppm or less, preferably 300 ppm or less. More preferably, 150 ppm or less is further preferable.
[0023]
　From the viewpoint of elasticity, the thermoplastic polyurethane elastomer is determined from the endothermic peak in the range of 90 ° C to 140 ° C, which is observed when the thermoplastic polyurethane elastomer is thermally analyzed using a differential scanning calorimeter (DSC). The total amount of heat of fusion (a) obtained and the total amount of heat of fusion (b) obtained from the endothermic peaks whose peak temperature exceeds 140 ° C and is 220 ° C or less satisfy the relationship of the following formula (I). It is more preferable that the relationship of the following formula (II) is satisfied, and it is further preferable that the relationship of the following formula (III) is satisfied.
　　　a / (a ​​+ b) ≤0.8 (I)
　　　a / (a ​​+ b) ≤0.7 (II)
　　　a / (a ​​+ b) ≤0.55 (III)
[0024]
　Here, "a / (a ​​+ b)" means the heat-melting ratio (unit:%) of the hard domain of the thermoplastic polyurethane-based elastomer. When the heat-melting ratio of the hard domain of the thermoplastic polyurethane-based elastomer is 80% or less, the strength and elasticity of the fibers, particularly the fibers and the non-woven fabric in the mixed fiber spunbonded non-woven fabric are improved. In the present disclosure, the lower limit of the heat-melting ratio of the hard domain of the thermoplastic polyurethane elastomer is preferably about 0.1%.
[0025]
　From the viewpoint of suppressing the occurrence of thread breakage, the melt viscosity of the thermoplastic polyurethane elastomer is preferably 100 Pa · s to 3000 Pa · s when measured under the conditions of a temperature of 200 ° C. and a shear rate of 100 sec -1. -S to 2000 Pa · s is more preferable, and 1000 Pa · s to 1500 Pa · s is further preferable. Here, the melt viscosity is a value measured by a capillograph (manufactured by Toyo Seiki Co., Ltd., a nozzle length of 30 mm and a diameter of 1 mm is used).
　A thermoplastic polyurethane-based elastomer having such properties can be obtained, for example, by the production method described in JP-A-2004-244791.
[0026]
　Since the spunbonded non-woven fabric formed by using the above-mentioned thermoplastic polyurethane-based elastomer has an excellent tactile sensation, it can be suitably used for, for example, a sanitary material.
　The thermoplastic polyurethane elastomer, which has a low content of insoluble in polar solvents, does not easily clog the filter installed inside the extruder to filter impurities during the production of the spunbonded non-woven fabric, and the frequency of equipment adjustment and maintenance is low. Become. Therefore, as will be described later, the above-mentioned thermoplastic polyurethane-based elastomer obtained by polymerizing a polyol, an isocyanate compound, and a chain extender and then filtering the elastomer is industrially preferable.
[0027]
　
　Heat as a raw material for long fibers made of a thermoplastic resin, which is one of the components forming a mixed fiber spunbonded non-woven fabric constituting at least the front surface layer and the back surface layer of the non-woven fabric laminate of the present disclosure. As the plastic resin (B), various known thermoplastic resins other than the thermoplastic polyurethane-based elastomer (A) can be used. For example, a crystalline polymer having a melting point (Tm) of 100 ° C. or higher measured using DSC, an amorphous polymer having a glass transition temperature of 100 ° C. or higher, and the like can be mentioned, and these thermoplastic resins ( Among B), a crystalline thermoplastic resin is preferable.
[0028]
　Further, among the thermoplastic resins (B), the maximum point elongation of the nonwoven fabric obtained by manufacturing by a known method for producing a spunbonded nonwoven fabric is preferably 50% or more, more preferably 70% or more, and further 100% or more. preferable. Further, as the thermoplastic resin (B), a thermoplastic resin (extensible thermoplastic resin) having a property of hardly recovering elasticity is preferable. When such a thermoplastic resin (extensible thermoplastic resin) is used, a mixed fiber spunbonded non-woven fabric or a mixed fiber spunbonded non-woven fabric obtained by mixing with the long fibers of the thermoplastic polyurethane elastomer (A) can be laminated. The non-woven fabric laminate or the like obtained in the above can exhibit a bulky feeling by the stretching process, improve the tactile sensation, and can impart a non-stretching function to the non-woven fabric laminate. The upper limit of the maximum point elongation of the spunbonded nonwoven fabric made of the thermoplastic resin (B) is not necessarily limited, and is, for example, 300% or less.
[0029]
　Specific examples of the thermoplastic resin (B) include homopolymers or copolymers of α-olefins such as ethylene, propylene, 1-butene, 1-hexene, 4-methyl-1-pentene and 1-octene. High-pressure method low-density polyethylene, linear low-density polyethylene (so-called LLDPE), high-density polyethylene (so-called HDPE), polypropylene (propylene homopolymer), polypropylene random copolymer, poly1-butene, poly4-methyl- Polyolefins such as 1-pentene, ethylene / propylene random copolymer, ethylene / 1-butene random copolymer, propylene / 1-butene random copolymer, ethylene / propylene / 1-butene random copolymer, polyester (polyethylene) Telephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamide (nylon-6, nylon-66, polymethoxylen adipamide, etc.), polyvinyl chloride, polyimide, ethylene / vinyl acetate copolymer, ethylene / vinyl alcohol Examples thereof include polymers, ethylene / (meth) acrylic acid copolymers, ethylene- (meth) acrylic acid ester-carbon monoxide copolymers, polyacrylonitrile, polycarbonates, polystyrenes, ionomers, and mixtures thereof. .. Among these, propylene-based polymers such as high-pressure low-density polyethylene, linear low-density polyethylene (so-called LLDPE), high-density polyethylene, polypropylene and polypropylene random copolymer, polyethylene terephthalate, polyamide and the like are more preferable. These thermoplastic resins (B) may be used alone or in combination of two or more.
　In addition, (meth) acrylic acid means acrylic acid or methacrylic acid.
[0030]
　Among these thermoplastic resins (B), polyolefins are preferable, and propylene-based polymers are more preferable, from the viewpoints of spinning stability during molding, stretchability of non-woven fabrics, and the like.
　In the present disclosure, the propylene-based polymer means a polymer containing 50 mol% or more of the constituent units derived from propylene.
　As the propylene-based polymer, the homopolymer of propylene or the common weight of one or more α-olefins of more than 0 mol% and 10 mol% or less with respect to the total of propylene and α-olefin. Coalescence is preferred. Examples of the α-olefin include α-olefins having 2 or more carbon atoms (excluding 3 carbon atoms) such as ethylene, 1-butene, 1-pentene, 1-hexene, 1-octene, and 4-methyl-1-pentene. Preferably, an α-olefin having 2 to 20 carbon atoms (excluding 3 carbon atoms) is more preferable, an α-olefin having 2 to 8 carbon atoms (excluding 3 carbon atoms) is further preferable, and ethylene is particularly preferable.
　The melting point measured by using the DSC of the homopolymer of propylene or the copolymer of propylene and the above-mentioned α-olefin is preferably 120 ° C. or higher, more preferably 140 ° C. or higher, and 155 ° C. It is more preferably ~ 175 ° C., and particularly preferably 157 ° C. to 165 ° C.
　The melting points of the homopolymer of propylene, the copolymer of propylene and the above-mentioned α-olefin, the propylene-based polymer (a-1) and the propylene-based polymer (a-2) described later are determined by a differential scanning calorimeter (differential scanning calorimetry). Defined as the peak top of the peak observed on the hottest side of the melt heat absorption curve obtained by holding at −40 ° C. for 5 minutes in a nitrogen atmosphere and then raising the temperature at 10 ° C./min using DSC). .. Specifically, using a differential scanning calorimeter (DSC-7, manufactured by PerkinElmer), 5 mg of the sample was held at −40 ° C. for 5 minutes in a nitrogen atmosphere, and then the temperature was raised at 10 ° C./min. It can be obtained as the peak top of the peak observed on the highest temperature side of the obtained melt endothermic curve.
[0031]
　The melt flow rate (MFR: ASTM D-1238, 230 ° C., load 2160 g) of the propylene-based polymer is not particularly limited as long as it can be melt-spun. For example, the melt flow rate of the propylene-based polymer is preferably 1 g / 10 minutes to 1000 g / 10 minutes, more preferably 5 g / 10 minutes to 500 g / 10 minutes, and even more preferably 10 g / 10 minutes to 100 g / 10 minutes. The ratio Mw / Mn of the weight average molecular weight (Mw) and the number average molecular weight (Mn) of the propylene-based polymer according to the present disclosure is preferably 1.5 to 5.0. From the viewpoint of obtaining fibers having good spinnability and particularly excellent fiber strength, Mw / Mn is preferably 1.5 to 3.0. Mw and Mn can be measured by using GPC (gel permeation chromatography) according to a known method.
　In the present disclosure, good spinnability means that yarn breakage is unlikely to occur during ejection from the spinning nozzle and during drawing, and filament fusion is unlikely to occur.
[0032]
　The thermoplastic resin (B) may contain two types of propylene-based polymers having different melting points as the propylene-based polymer, or may be composed of two types of propylene-based polymers having different melting points. Hereinafter, regarding two types of propylene-based polymers having different melting points, the propylene-based polymer having a higher melting point is referred to as a propylene-based polymer (a-1), and the propylene-based polymer having a lower melting point is referred to as a propylene-based polymer (a-). 2).
　The melting point of the propylene-based polymer (a-1) is preferably 120 ° C. to 175 ° C., and the melting point of the propylene-based polymer (a-2) is preferably 110 ° C. to 165 ° C.
　The melting point of the propylene-based polymer (a-1) measured using DSC is preferably higher than that of the propylene-based polymer (a-2) by 10 ° C. or higher, and more preferably 20 ° C. or higher.
　The ratio of the MFR of the propylene-based polymer (a-2) to the MFR of the propylene-based polymer (a-1) (propylene-based polymer (a-2) / propylene-based polymer (a-1)) is 0. It is preferably 7 to 1.5, more preferably 0.8 to 1.2, and even more preferably 0.9 to 1.1.
　The mass ratio of the propylene-based polymer (a-1) to the propylene-based polymer (a-2) (propylene-based polymer (a-1) / propylene-based polymer (a-2)) is 50/50 to 5 It is preferably / 95, more preferably 40/60 to 10/90, and even more preferably 30/70 to 10/90.
[0033]
　As the propylene-based polymer (a-1), a homopolymer of propylene is preferable. As the propylene-based polymer (a-2), a copolymer of propylene and one or more α-olefins in an amount of more than 0 mol% and 10 mol% based on the total of propylene and α-olefin is preferable. .. The α-olefin in the propylene-based polymer (a-2) is not particularly limited as long as it is other than propylene, and is, for example, ethylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 4-methyl-. 1-Pentene and the like are preferable, and ethylene is more preferable.
[0034]
　From the viewpoint of suitability for stretching the obtained non-woven laminate, the thermoplastic resin (B) is a propylene-based polymer such as a copolymer of propylene and the above-mentioned α-olefin and a polyolefin (propylene and the above-mentioned α-olefin). It may contain at least one of the copolymers of propylene and the above-mentioned α-olefin and polyolefin (melting point of 120 ° C. or higher) together with a homopolymer of propylene having a melting point of 120 ° C. or higher. It may contain at least one of a homopolymer of propylene and a copolymer of propylene and the above-mentioned α-olefin). Examples of the polyolefins shown here include the polyolefins listed above, the polyolefins contained in the core-sheath type composite fibers described below, and the propylene homopolymer having a melting point of less than 120 ° C. satisfying the following (a) to (f). Be done. Here, the copolymer of propylene and the above-mentioned α-olefin and the polyolefin may be independently used alone or in combination of two or more.
(A) [mmmm] = 20 mol% to 60 mol%
(b) [rrrr] / (1- [mmmm]) ≦ 0.1
(c) [rmrm]> 2.5 mol%
(d) [mm] × [rr] / [mr] 2 ≦ 2.0
(e) Weight average molecular weight (Mw) = 10,000 to 200,000
(f) Molecular weight distribution (Mw / Mn) <4
In (a) to (d), [mm mm] is a racemic pentad fraction, [rrrr] is a racemic pentad fraction, and [rmrm] is a racemic mesolacemic mesopentad fraction, [mm], [Rr] and [mr] are triad fractions, respectively. Each of these fractions can be calculated according to the method proposed by A. Zambeli et al. In "Macromopolymers, 6,925 (1973)".
　Examples of the propylene homopolymer having a melting point of less than 120 ° C. that satisfies (a) to (f) include the polymer (II) described in International Publication No. 2017/006972.
[0035]
　When the thermoplastic resin (B) contains two or more types of polymers, for example, when the thermoplastic resin (B) contains two or more types of propylene-based polymers, the thermoplastic resin (B) contains a thermoplastic resin (from the viewpoint of improving expansion and contraction characteristics). The long fiber of B) may be a composite fiber having substantially separate regions in a cross section orthogonal to the length direction, and the separate regions exist along the length direction. Examples of such composite fibers include core-sheath type composite fibers, side-by-side type composite fibers, sandwich type composite fibers and the like. The core-sheath type composite fiber may be an eccentric core-sheath type composite fiber in which the centers of the core and the sheath are offset in the fiber cross section, and the eccentric core-sheath-type composite fiber is a core and a sheath. Includes an eccentric type in which the core is misaligned and the core is wrapped in a sheath, and a parallel type in which the eccentric core is not wrapped in a sheath. Such a composite fiber can be produced, for example, by the method described in JP-A-2005-205744.
[0036]
　As the core-sheath type composite fiber, a sheath portion made of a polyolefin having a weight average molecular weight (Mw) of less than about 65,000 g / mol and Mw are at least about 20,000 g / mol than the Mw of the polyolefin constituting the sheath portion. It may be a composite fiber containing a core portion containing a large polymer. Examples of the fiber constituting the core include α-olefins such as propylene and ethylene, homopolymers or copolymers such as styrene, (meth) acrylic acid, and (meth) acrylic acid ester, and combinations thereof. Further, examples of the core-sheath type composite fiber include a two-component polymer fiber having a core containing a core polymer and a sheath containing a sheath polymer described in Japanese Patent Application Laid-Open No. 2014-502315.
[0037]
　An olefin-based polymer composition obtained by adding HDPE to a propylene-based polymer is preferable because it can further improve the stretchability of the obtained nonwoven fabric laminate. The content of HDPE is preferably 1% by mass to 20% by mass, more preferably 2% by mass to 15% by mass, based on 100% by mass of the total of the propylene-based polymer and HDPE from the viewpoint of spinnability and stretchability. %, More preferably 4% by mass to 10% by mass. The content of the propylene-based polymer is preferably 80% by mass to 99% by mass, more preferably 85, based on 100% by mass of the total of the propylene-based polymer and HDPE from the viewpoint of spinnability and stretchability. It is by mass% to 98% by mass, more preferably 90% by mass to 96% by mass.
[0038]
　The HDPE added to the propylene polymer is not particularly limited.
　For example, the density of the HDPE is 0.94 g / cm 3 ~ 0.97 g / cm 3 preferably, 0.95 g / cm 3 ~ 0.97 g / cm 3 , more preferably, 0.96 g / cm 3 ~ 0.97 g / cm 3 is even more preferred.
　The melt flow rate of HDPE (MFR: ASTM D-1238, 190 ° C., load 2160 g) is not particularly limited as long as the olefin polymer composition has spinnability. For example, the melt flow rate of HDPE is preferably 0.1 g / 10 minutes to 100 g / 10 minutes, more preferably 0.5 g / 10 minutes to 50 g / 10 minutes, and 1 g / 10 minutes from the viewpoint of exhibiting extensibility. It is more preferably ~ 30 g / 10 minutes.
[0039]
　 In the
　present disclosure, various stabilizers such as heat-resistant stabilizers and weather-resistant stabilizers, antistatic agents, antislip agents, antifogging agents, lubricants, etc. are independently used as optional components for fibers and mixed fiber spunbonded non-woven fabrics. Dyes, pigments, natural oils, synthetic oils, waxes, fillers and the like can be added. These may be used alone or in combination of two or more.
[0040]
　Stabilizers include, for example, anti-aging agents such as 2,6-di-t-butyl-4-methylphenol (BHT); tetrakis [methylene-3- (3,5-di-t-butyl-4-hydroxy). Phenyl) propionate] methane, 6- (3,5-di-t-butyl-4-hydroxyphenyl) propionic acid alkyl ester, 2,2'-oxamidbis [ethyl-3- (3,5-di-t-butyl) -4-Hydroxyphenyl)] Propionate, phenolic antioxidants such as Irganox 1010 (hindered phenolic antioxidants: trade name); fatty acid metal salts such as zinc stearate, calcium stearate, calcium 1,2-hydroxystearate Examples thereof include polyhydric alcohol fatty acid esters such as glycerin monostearate, glycerin distearate, pentaerythritol monostearate, pentaerythritol distearate, and pentaerythritol tristearate. These may be used alone or in combination of two or more.
[0041]
　Examples of the lubricant include fatty acid amides having 15 to 22 carbon atoms such as palmitate amide, oleic acid amide, erucic acid amide, and stearic acid amide.
[0042]
　Examples of the filler include silica, calcium, alumina, titanium oxide, magnesium oxide, pebbles powder, pebbles balloon, aluminum hydroxide, magnesium hydroxide, basic magnesium carbonate, dolomite, calcium sulfate, potassium titanate, and sulfuric acid. Examples thereof include barium, calcium sulfite, talc, clay, mica, asbestos, calcium silicate, montmorillonite, bentonite, graphite, aluminum powder, molybdenum sulfide and the like.
[0043]
　Hereinafter, the front surface layer, the intermediate layer, and the back surface layer constituting the non-woven fabric laminate will be described.
[0044]
　(Front surface layer and back surface layer)
　The front surface layer and the back surface layer of the present disclosure are spunbonded non-woven fabrics each independently containing long fibers of a thermoplastic polyurethane-based elastomer (A) and long fibers of a thermoplastic resin (B).
　The content of the long fibers of the thermoplastic polyurethane elastomer (A) contained in the front surface layer and the back surface layer is preferably 60% by mass or less, more preferably 58% by mass or less, based on the total amount of the long fibers constituting each layer.
　The configurations of the front surface layer and the back surface layer of the present disclosure may be the same or different from each other. For example, when the configurations of the front surface layer and the back surface layer are different from each other, for example, the front surface layer and the back surface layer of the present disclosure are the long fibers of the thermoplastic polyurethane elastomer (A), the long fibers of the thermoplastic resin (B), and the like. The content ratio and the like may be different.
[0045]
　Production of spunbonded non-woven fabric due to the adhesiveness of the thermoplastic polyurethane elastomer (A) when the content of the long fibers of the thermoplastic polyurethane elastomer (A) contained in the front surface layer and the back surface layer is 60% by mass or less. Since it is possible to suppress problems at the time, it tends to be excellent in continuous moldability (does not adhere to a molding machine or the like). Further, for the same reason, the content of the long fibers of the thermoplastic polyurethane elastomer (A) contained in the front surface layer and the back surface layer is more preferably 58% by mass or less.
　On the other hand, from the viewpoint of maintaining the expansion and contraction characteristics, the content of the long fibers of the thermoplastic polyurethane-based elastomer (A) contained in the front surface layer and the back surface layer is preferably 10% by mass or more, preferably 20% by mass or more. More preferably, it is more preferably 30% by mass or more, and particularly preferably 40% by mass or more.
[0046]
　Further, the mixed fiber mass ratio of the long fibers of the thermoplastic polyurethane-based elastomer (A) and the long fibers of the thermoplastic resin (B) in the front surface layer or the back surface layer (long fibers of the thermoplastic polyurethane-based elastomer (A): thermoplastic. The resin (B) long fiber) is preferably 10:90 to 60:40 (however, (A) + (B) = 100% by mass) from the viewpoint of improving the expansion and contraction characteristics, and 50: It is more preferable that the ratio is 50 to 60:40 (however, (A) + (B) = 100% by mass). In the front surface layer and the back surface layer of the non-woven fabric laminate of the present disclosure, even if the mixed fiber mass ratio of the long fibers of the thermoplastic polyurethane elastomer (A) and the long fibers of the thermoplastic resin (B) is the same. , May be different.
[0047]
　A surface layer (hereinafter, also referred to as "surface layer (C-1)") and a back surface layer (hereinafter, "back surface layer (C-)" sandwiching an intermediate layer (hereinafter, also referred to as "intermediate layer (D-1)"). 2) ”), the mixing ratio of the long fibers of the thermoplastic polyurethane elastomer (A) may be the same or different, from the viewpoint of suppressing curl after lamination and improving moldability. Therefore, it is preferable that the mixed fiber ratios are the same or the difference in the mixed fiber ratios is small.
　More specifically, the absolute value of the above-mentioned difference in fiber mixing ratio between the front surface layer (C-1) and the back surface layer (C-2) is the improvement of curl resistance after lamination and the productivity and production of the non-woven fabric laminate. From the viewpoint of improving efficiency, 40% or less is preferable, 30% or less is more preferable, 20% or less is further preferable, and 0% to 10% is particularly preferable. From the viewpoint of improving curl resistance after laminating and improving the productivity and production efficiency of the non-woven laminate, the ratio of the back layer (C-2) to the front layer (C-1) (back surface layer (C-)). 2) / Surface layer (C-1)) is preferably 2 to 0.5, more preferably 1.5 to 0.67, further preferably 1.2 to 0.83, and 1.1 to 0.91. Is particularly preferable.
[0048]
　Increasing the mixing ratio of the long fibers of the thermoplastic polyurethane elastomer (A) improves the elasticity, flexibility, and the like of the obtained mixed fiber spunbonded non-woven fabric. On the other hand, when the mixing ratio of the long fibers of the thermoplastic polyurethane elastomer (A) is lowered, the spinning stability is improved, and the obtained mixed fiber spunbonded non-woven fabric is wound around the molding apparatus (rolls, non-woven fabric collecting belt). Can be suppressed.
[0049]
　As described above, the quality and moldability of the obtained mixed fiber spunbonded non-woven fabric can be adjusted by changing the fiber mixing ratio of the long fibers of the thermoplastic polyurethane elastomer (A) constituting the front surface layer and the back surface layer. Therefore, in order to obtain a non-woven fabric laminate having elasticity, flexibility, good tactile sensation, and good moldability, the fiber mixing ratio may be changed for each layer.
[0050]
　The "mixed fiber ratio" represents the ratio of a specific type of fiber contained in the non-woven fabric layer formed by mixing two or more types of fibers, or the mixing ratio of various fibers in the non-woven fabric layer. That is, the "mixture ratio of the long fibers of the thermoplastic polyurethane elastomer (A)" in the spunbonded non-woven layer composed of the thermoplastic polyurethane elastomer (A) and the thermoplastic resin (B) is {thermoplastic polyurethane-based. The mass of the long fibers of the elastomer (A) ÷ (the mass of the long fibers of the thermoplastic polyurethane-based elastomer (A) + the mass of the long fibers of the thermoplastic resin (B))}. The "mixture ratio of the long fibers of the thermoplastic resin (B)" is {mass of the long fibers of the thermoplastic resin (B) ÷ (mass of the long fibers of the thermoplastic polyurethane elastomer (A) + thermoplastic resin). (B) Mass of long fibers)}. Further, "the mixing ratio is different" between the spunbonded non-woven fabric layers composed of the thermoplastic polyurethane elastomer (A) and the thermoplastic resin (B) means the mixing ratio of (A) and (B) in each non-woven fabric layer. Indicates that is different.
[0051]
　(Intermediate layer)
　The intermediate layer of the present disclosure is a spunbonded non-woven fabric layer containing 50% by mass or more of long fibers of the thermoplastic polyurethane elastomer (a). When the spunbonded non-woven fabric layer forming the intermediate layer contains 50% by mass or more of the long fibers of the thermoplastic polyurethane elastomer (a), good stretch characteristics can be easily obtained. Further, from the viewpoint of improving the stretchability, the intermediate layer preferably contains 70% by mass or more of the long fibers of the thermoplastic polyurethane elastomer (a), more preferably 80% by mass or more, and 90% by mass or more. It is more preferable to include it, and it is particularly preferable that it is composed of only the long fibers of the thermoplastic polyurethane-based elastomer (a).
　Further, the intermediate layer may contain fibers other than the thermoplastic polyurethane elastomer (a) as long as the expansion and contraction characteristics are not impaired. The fibers other than the thermoplastic polyurethane-based elastomer (a) are not particularly limited, and the above-mentioned thermoplastic resin (B), other elastomer resin and the like are preferable, and the above-mentioned thermoplastic resin (B) is more preferable.
　The long fibers of the thermoplastic polyurethane-based elastomer (a) contained in the spunbonded non-woven fabric layer forming the intermediate layer are the same as the long fibers of the thermoplastic polyurethane-based elastomer (A) contained in the front surface layer and / or the back surface layer. Or may be different long fibers. Further, the layer structure of the intermediate layer of the present disclosure may be the same as or different from that of the front surface layer or the back surface layer, and further, the layer structures of the intermediate layer, the front surface layer, and the back surface layer are all the same. May also be different.
[0052]
　The intermediate layer (D-1) of the above-mentioned nonwoven fabric laminate is particularly preferably made of long fibers of the thermoplastic polyurethane-based elastomer (a). In this case, the flexibility of the thermoplastic polyurethane-based elastomer (A) The stretchability is utilized, and the continuous moldability (does not adhere to a molding machine or the like) due to the non-adhesiveness of the thermoplastic resin (B) is utilized in the front surface layer (C-1) and the back surface layer (C-2). Therefore, it is possible to obtain a non-woven fabric laminate having excellent expansion and contraction characteristics and excellent continuous moldability. The non-woven fabric composed of only the intermediate layer (D-1) without the front surface layer (C-1) and the back surface layer (C-2), that is, the thermoplastic polyurethane elastomer (a) is the thermoplastic polyurethane elastomer (a). ) Will adhere to the molding machine due to the adhesiveness, and the desired non-woven fabric cannot be collected.
[0053]
　(Other Layers)
　The nonwoven fabric laminate of the present disclosure may be laminated with other layers depending on various uses.
　Specific examples of other layers laminated on the non-woven fabric laminate of the present disclosure include knitted fabrics, woven fabrics, non-woven fabrics, films and the like. When laminating the non-woven fabric laminate of the present disclosure with another layer, heat embossing, heat fusion methods such as ultrasonic fusion, mechanical entanglement methods such as needle punching and water jet, hot melt adhesives, urethane-based materials. The non-woven fabric laminate of the present disclosure and other layers can be laminated by various known methods such as a method using an adhesive or the like, an extrusion laminating method, or the like.
[0054]
　Examples of the non-woven fabric laminated on the non-woven fabric laminate of the present disclosure include various known non-woven fabrics such as spunbonded non-woven fabric, melt blown non-woven fabric, wet non-woven fabric, dry non-woven fabric, dry pulp non-woven fabric, flash-spun non-woven fabric, and spread fiber non-woven fabric.
　Examples of the film laminated on the non-woven fabric laminate of the present disclosure include a moisture-permeable film and a breathable film.
[0055]
　The basis weight of the non-woven fabric laminate of the present disclosure can be selected according to various uses. For example, in the use of sanitary materials such as diapers, the total basis weight of the laminates is preferably 200 g / m 2 or less, more preferably 100 g / m 2 or less, from the viewpoint of flexibility and breathability . It is more preferably 80 g / m 2 or less, and particularly preferably 15 g / m 2 to 70 g / m 2 . Further, the basis weights of the front surface layer (C-1), the back surface layer (C-2) and the intermediate layer (D-1) can be selected according to various uses, but from the viewpoint of improving the expansion and contraction characteristics, the front surface layer and the back surface. It is preferable that the basis weight of the layer and the intermediate layer are the same or the difference is small. When the texture of the entire non-woven fabric laminate is constant and the texture of the front surface layer (C-1) and the back surface layer (C-2) is increased, the long fibers of the thermoplastic polyurethane elastomer (A) occupying the entire non-woven fabric laminate. The ratio of the above is reduced, and the elasticity is reduced. On the contrary, if the basis weight of the front surface layer (C-1) and the back surface layer (C-2) is reduced, the elasticity is improved. More specifically, the ratio of the intermediate layer basis weight to the surface layer basis weight, that is, the value of the intermediate layer (D-1) / surface layer (C-1), and the ratio of the intermediate layer basis weight to the back surface layer basis weight, that is, the intermediate layer ( By setting the value of D-1) / back surface layer (C-2) to preferably 4 to 0.25, more preferably 3 to 0.25, and further preferably 2 to 0.5, good expansion and contraction characteristics are obtained. Tends to be obtained.
[0056]
(Method for Manufacturing Nonwoven Fabric Laminate) When the nonwoven fabric laminate according to the
　present disclosure is laminated and integrated, it is integrated by various known entanglement methods. When laminating and integrating are performed offline, there may be an example of winding without entanglement, but productivity can be improved by performing some prebonding by a known entanglement method. Examples of such an entanglement method include a method in which fibers are deposited on a moving belt and then compacted with a nip roll. At this time, it is desirable that the roll is heated so that some prebonding can be performed. Other examples of the prebonding method include a method using means such as needle punching, water jet, and ultrasonic waves, a method using thermal embossing using an embossing roll, and a method using hot air through. It is preferable that all of them are entangled lighter than usual from the viewpoint of texture and elasticity after lamination. Such an entanglement method may be performed alone or in combination of a plurality of entanglement methods.
[0057]
　In the case of heat fusion by heat embossing, the embossed area ratio of the nonwoven fabric laminate according to the present disclosure is usually preferably 5% to 20%, more preferably 10% to 20%, and the non-embossed unit area is 0.5 mm. 2 or more is preferable, and 4 mm 2 to 40 mm 2 is more preferable. The non-embossed unit area is the maximum area of ​​a quadrangle inscribed in the embossed portion in the smallest unit non-embossed portion surrounded by embossed portions on all sides. Examples of the engraved shape include a circle, an ellipse, an oval, a square, a rhombus, a rectangular shape, and a square, and continuous shapes based on these shapes. When the embossed portion is formed so as to satisfy the embossed area ratio and the non-embossed unit area in such a range, the long fibers of the thermoplastic polyurethane-based elastomer (A) and the thermoplastic resin (B) constituting the mixed fiber spunbonded nonwoven fabric are formed. Bound to the embossed portion between the fibers and between the spunbonded non-woven fabric layer containing 50% by mass or more of the long fibers of the thermoplastic polyurethane elastomer (a) as an intermediate layer and the mixed fiber spunbonded non-woven fabric layer. Points are formed and substantially combined. Further, in the mixed fiber spunbonded non-woven fabric layer, the elasticity is smaller than that of the long fibers of the thermoplastic polyurethane-based elastomer (A) having elasticity between the embossed portions and the long fibers of the thermoplastic polyurethane-based elastomer (A) substantially (the elasticity is smaller). Stretched fiber) The long fiber of the thermoplastic resin (B) exists in a state having a large degree of freedom. With such a structure, the mixed fiber spunbonded non-woven fabric exhibits a reduction in residual strain, good elasticity, and the like after the stretching process.
[0058]
　When the embossed area ratio is large, the stretchable range is small, but the stress is improved. Further, when the embossed area ratio is small, the stretchable range can be increased, but the embossed pitch tends to be large and the residual strain tends to be slightly large.
[0059]
　The non-woven fabric laminate according to the present disclosure uses a thermoplastic polyurethane-based elastomer (A), a thermoplastic polyurethane-based elastomer (a), and a thermoplastic resin (B), and a known method for producing a spunbonded non-woven fabric, for example, Japanese Patent Application Laid-Open No. It can be produced by the method described in JP-A-2004-244791.
[0060]
　The nonwoven fabric laminate of the present disclosure can be produced using a spunbonded nonwoven fabric manufacturing apparatus equipped with at least three series of spinning apparatus. First, the thermoplastic polyurethane-based elastomer (A) and the thermoplastic resin (B) constituting the surface layer are melted by separate extruders, and then the melts are individually provided with a large number of spinning holes (nozzles). The thermoplastic polyurethane elastomer (A) and the thermoplastic resin (B) are introduced into the base (die) and simultaneously discharged from different spinning holes at the same time, and then melt-spun the thermoplastic polyurethane elastomer (A). The long fibers and the long fibers of the thermoplastic resin (B) are introduced into the cooling chamber. After cooling with cooling air in the cooling chamber, the long fibers are stretched (towed) by the stretched air and deposited on the mobile collection surface to produce a mixed fiber spunbonded non-woven fabric constituting the surface layer.
[0061]
　Then, in another series, the thermoplastic polyurethane-based elastomer (a) was melted in a separate extruder, and then the melt was introduced into a die with a large number of spinning holes (nozzles) to make the thermoplastic polyurethane. After the system elastomer (a) is discharged from the spinning holes, the long fibers of the melt-spun thermoplastic polyurethane-based elastomer (a) are introduced into the cooling chamber. After cooling with cooling air in the cooling chamber, the long fibers are stretched (towed) by the stretched air and deposited on the surface of the mixed fiber spunbonded non-woven fabric constituting the surface layer to form an intermediate layer.
　Here, when the intermediate layer is a mixed fiber spunbonded non-woven layer, resins other than the thermoplastic polyurethane elastomer (a) and the thermoplastic polyurethane elastomer (a) are melted by separate extruders to be described above. Similarly, the intermediate layer is prepared.
[0062]
　Then, a non-woven fabric laminate can be produced by laminating a back surface layer made of a mixed fiber spunbonded non-woven fabric obtained by the same method as the mixed fiber spunbonded non-woven fabric constituting the front surface layer on the intermediate layer.
　The melting temperature of the thermoplastic polyurethane elastomer (A) and the thermoplastic resin (B) is not particularly limited as long as it is equal to or higher than the respective softening temperature or melting temperature and lower than the thermal decomposition temperature, and can be determined by the raw materials used. .. The base temperature depends on the raw material used, but for example, a thermoplastic polyurethane elastomer (A) is used, and the thermoplastic resin (B) is a propylene polymer or an olefin polymer composition of a propylene polymer and HDPE. When is used, 180 ° C. to 240 ° C. is preferable, 190 ° C. to 230 ° C. is more preferable, and 200 ° C. to 225 ° C. is further preferable.
[0063]
　The temperature of the cooling air is not particularly limited as long as it is the temperature at which the long fibers solidify. For example, 5 ° C. to 50 ° C. is preferable, 10 ° C. to 40 ° C. is more preferable, and 15 ° C. to 30 ° C. is further preferable. The wind speed of the stretched air is preferably 100 m / min to 10,000 m / min, more preferably 500 m / min to 10,000 m / min.
[0064]
　The non-woven fabric laminate of the present disclosure may be further stretched. Further, the nonwoven fabric laminate may be entangled by the entanglement method, preferably embossing, before the stretching process.
　The non-woven fabric laminate of the present disclosure has a elongation recovery rate of long fibers of the thermoplastic polyurethane-based elastomer (A) and long fibers of the thermoplastic resin (B) constituting the mixed fiber spunbonded non-woven fabric layer constituting the front surface layer and the back surface layer. There is a difference in the growth recovery rate of. Therefore, when such stretching processing is performed, the stretched long fibers of the thermoplastic polyurethane-based elastomer (A) recover elastically and return to near the length before stretching, whereas the long fibers of the thermoplastic resin (B) are restored. Stays close to the stretched state. Therefore, since the long fibers of the thermoplastic resin (B) are folded on the surface of the non-woven fabric laminate, the non-woven fabric laminate is more bulky and highly flexible.
[0065]
　[Stretchable Nonwoven Fabric Laminate]
　The stretchable non-woven fabric laminate of the present disclosure is a non-woven fabric laminate having elasticity obtained by stretching the non-woven fabric laminate.
[0066]
　The stretchable nonwoven fabric laminate of the present disclosure can be obtained by stretching the nonwoven fabric laminate. The method of stretching is not particularly limited, and conventionally known methods can be applied. The method of stretching may be a method of partially stretching or a method of totally stretching. Further, it may be a method of uniaxial stretching or a method of biaxial stretching. Examples of the method of stretching in the flow direction (MD) of the machine include a method of passing mixed fibers partially fused to two or more nip rolls. At this time, the partially fused nonwoven fabric laminate can be stretched by increasing the rotation speed of the nip roll in the order of the flow direction of the machine. Further, the gear stretching process can also be performed using the gear stretching device shown in FIG.
[0067]
　The lower limit of the draw ratio is preferably 50% or more, more preferably 100% or more, still more preferably 200% or more. The upper limit of the draw ratio is preferably 1000% or less, more preferably 400% or less.
[0068]
　In the case of uniaxial stretching, it is preferable that either the stretching ratio in the flow direction (MD) of the machine or the direction perpendicular to the stretching ratio (CD) satisfies the stretching ratio. In the case of biaxial stretching, it is preferable that at least one of the flow direction (MD) of the machine and the direction perpendicular to the flow direction (CD) satisfies the stretching ratio.
[0069]
　By stretching at such a draw ratio, both the intermediate layer and the (long) fibers forming the mixed fiber spunbonded non-woven fabric layer are stretched, and the long fibers forming the mixed fiber spunbonded non-woven fabric layer are plastically deformed. Therefore, it is stretched (that is, lengthened) according to the stretching ratio.
[0070]
　Therefore, when the stress is released after stretching the non-woven fabric laminate, the (long) fibers forming the intermediate layer elastically recover, and the long fibers forming the mixed fiber spunbonded non-woven fabric layer fold without elastic recovery. However, a feeling of bulkiness is developed in the non-woven fabric laminate. Moreover, the long fibers forming the mixed fiber spunbonded non-woven fabric layer tend to be thin. Therefore, it is considered that the flexibility and the tactile sensation are improved, and the function of stopping the elongation can be imparted.
[0071]
　[Textile Products]
　The textile products of the present disclosure include the nonwoven fabric laminates of the present disclosure or the stretchable nonwoven fabric laminates. Textile products are not particularly limited, and examples thereof include disposable diapers, absorbent articles such as sanitary products, sanitary articles such as sanitary masks, medical articles such as bandages, clothing materials, and packaging materials. The textile products of the present disclosure preferably include the non-woven fabric laminate or the stretchable non-woven fabric laminate of the present disclosure as elastic members.
Example
[0072]
　Hereinafter, the present invention will be described in more detail based on Examples, but the present invention is not limited to these Examples.
　Physical property values ​​and the like in Examples and Comparative Examples were measured by the following methods.
[0073]
　(1) 　Five test pieces of 250 mm (MD) × 200 mm (CD) were collected from the basis weight [g / m 2 ]
non-woven fabric. In addition, the collection place was arbitrary 5 places. Next, the mass (g) of each of the collected test pieces was measured using a precision electronic balance (manufactured by Kensei Kogyo Co., Ltd.), and the average value of the masses of each test piece was determined. The calculated average value was converted into mass (g) per 1 m 2 , and the second decimal place was rounded off to obtain the basis weight [g / m 2 ] of each non-woven fabric sample .
[0074]
　(2) General basis weight [g / m 2 ]
　basis weight of each layer constituting the non-woven fabric laminate [g / m 2 total overall basis weight of] [g / m 2 was].
[0075]
　(3) Spinnability The
　number of yarn breaks during spinning of the spunbonded nonwoven fabric shown in Examples was measured and evaluated according to the following classification.
A: No thread breakage
B: Number of thread breaks 1 to 9 times
C: Thread breakage occurs 10 times or more (intermittently occurs)
[0076]
　(4) 50% stretch stress [N / 50 mm], 50% recovery stress [N / 50 mm], and stretch characteristics
　Five test pieces of 50 mm (MD) × 200 mm (CD) were collected from the non-woven fabric laminate. In addition, the collection place was arbitrary 5 places. Next, each of the collected test pieces was stretched using a universal tensile tester (manufactured by Intesco, IM-201 type) under the conditions of a chuck distance of 100 mm, a tensile speed of 100 mm / min, and a draw ratio of 100%, and then immediately the same. It recovered to the original length at a speed. When this operation is carried out for two cycles, the stress when the draw ratio becomes 50% at the time of extension of the second cycle is set as the stress at the time of 50% extension, and the stress when the draw ratio becomes 50% at the time of recovery of the second cycle. The stress was defined as the stress at 50% recovery. In addition, the value of [50% recovery stress ÷ 50% elongation stress] in the second cycle was measured and used as a measure of expansion and contraction characteristics. [50% recovery stress ÷ 50% elongation stress] means that the larger the value, the better the expansion / contraction characteristics.
　In the present disclosure, the value indicating the expansion / contraction characteristic [50% recovery stress ÷ 50% elongation stress] (hereinafter, also referred to as “stretching characteristic (times / stretching)”) is required to be 0.32 or more. , 0.47 or more, and more preferably 0.50 or more.
　For the expansion and contraction characteristics, the average value was calculated for the above five points, and the third decimal place was rounded off.
[0077]
(5) A low-temperature heat-sealable
　non-woven fabric laminate and a non-woven fabric peeled from a commercially available disposable diaper are laminated one by one, and heat-sealed using a heat sealer under the conditions of a temperature of 160 ° C., a pressure of 0.5 MPa, and a time of 20 seconds. Samples were prepared. Three 250 mm (MD) × 50 mm (CD) test pieces were collected from the prepared sample. Next, gum tape was attached to both sides of a part of the test piece (20 mm from the edge in the MD direction). Then, by manually pulling the gum tape in both directions of the test piece, the layers of the non-woven fabric laminate were peeled off by 100 mm. After that, each peeled layer is set in a constant speed extension type tensile tester, a tensile test is performed under the conditions of a chuck distance of 100 mm and a tensile speed of 100 mm / min, and the stress of the test piece at the time when the load applied to the test piece is maximized. Was measured. The average value of the three test pieces was evaluated as low temperature heat sealability (hereinafter, also referred to as "low temperature heat sealability @ 160 ° C."). When the test piece was firmly fixed to the extent that the base material was destroyed, it was regarded as "material breakage". When the non-woven fabric laminate and the non-woven fabric peeled from the commercially available disposable diaper were peeled off by the weight of the test piece, it was judged as "no adhesion".
[0078]
　
　TPU (A-1), which is a thermoplastic polyurethane elastomer (A), was produced as follows.
　Polyester polyol having a number average molecular weight of 1932: 71.7 parts by mass, 1,4-butanediol (hereinafter abbreviated as "BD"): 4.8 parts by mass, pentaerythritol tetrakis [3- (3,5-di) -T-Butyl-4-hydroxyphenyl) propionate] (hereinafter abbreviated as "antioxidant-1"): 0.3 parts by mass, polycarbodiimide: 0.3 parts by mass, MDI: 22.9 A part by mass was added, and the mixture was stirred and mixed at a sufficiently high speed, and then reacted at 160 ° C. for 1 hour. After pulverizing this reaction product, ethylene bisstearic amide: 0.8 parts by mass, triethylene glycol-bis- [3- (3,5-di-t-butyl), relative to 100 parts by mass of the pulverized product. -4-Hydroxyphenyl) propionate] (hereinafter abbreviated as "antioxidant-2"): 0.5 parts by mass, ethylene bisoleic acid amide (hereinafter abbreviated as "EOA"): 0.8 parts by mass. Was mixed and then melt-kneaded with an extruder (set temperature: 210 ° C.) to granulate to obtain TPU (A-1).
　The physical properties of the obtained TPU (A-1) were a storage elastic modulus at 23 ° C.: 17.9 MPa, a melting point (high melting point side) of 162.2 ° C., a heat of fusion of 11.4 mJ / mg, and a shore A hardness of 82. Met.
[0079]
　 TPU (A-2
　), which is another thermoplastic polyurethane-based elastomer that is not the thermoplastic polyurethane-based elastomer (A), is prepared as follows. Manufactured.
　A polyester polyol having a number average molecular weight of 1932: 63.8 parts by mass, BD: 7.3 parts by mass, antioxidant-1: 0.3 parts by mass, polycarbodiimide: 0.3 parts by mass, and MDI: 28. .3 parts by mass was added, and the mixture was stirred and mixed at a sufficiently high speed, and then reacted at 160 ° C. for 1 hour. After pulverizing this reaction product, ethylene bisstearic acid amide: 0.4 parts by mass and antioxidant-2: 0.5 parts by mass are mixed with 100 parts by mass of the pulverized product, and then an extruder is used. TPU (A-2) was obtained by melt-kneading and granulating at (set temperature: 210 ° C.).
　The physical properties of the obtained TPU (A-2) were a storage elastic modulus at 23 ° C.: 25.2 MPa, a melting point (high melting point side) of 170.0 ° C., a heat of fusion of 14.1 mJ / mg, and a shore A hardness of 86. Met.
[0080]
　 A
　thermoplastic resin composition (B-1) which is a thermoplastic resin (B) was obtained as follows.
　MFR (according to ASTM D1238, measured at a temperature of 230 ° C. and a load of 2160 g) 60 g / 10 minutes, density 0.91 g / cm 3 , propylene homopolymer with a melting point of 160 ° C. (hereinafter abbreviated as "hPP") 92% by mass MFR (measured at a temperature of 190 ° C. and a load of 2160 g according to ASTMD1238) 5 g / 10 minutes, density 0.97 g / cm 3 , high density polyethylene with a melting point of 134 ° C. (hereinafter abbreviated as "HDPE") 8% by mass Was mixed to prepare a thermoplastic resin composition (B-1) (hereinafter, also referred to as “hpp / HDPE”).
[0081]
　[Example 1]
　 The
　TPU (A-1) and the thermoplastic resin composition (B-1) are independent of each other. After melting with a 75 mmφ extruder and a 50 mmφ extruder, the resin temperature and die temperature are both 210 ° C, cooling air temperature 20 ° C, and stretched air air velocity using a spunbond non-woven fabric molding machine with a spun cap. Melt-spun by the spunbond method under the condition of 3160 m / min, the mixed fiber mass ratio of the long fiber A made of TPU (A-1) and the long fiber B made of the thermoplastic resin composition (B-1) is 55: Forty-five webs were deposited on the collection surface.
　The spinneret has a nozzle pattern in which discharge holes of A-1 (long fibers A) and discharge holes of B-1 (long fibers B) are alternately arranged, and the nozzle diameter of the long fibers A is large. The diameter of the long fiber B is 0.75 mmφ, the nozzle diameter of the long fiber B is 0.6 mmφ, the pitch of the nozzles is 8 mm in the vertical direction and 11 mm in the horizontal direction, and the ratio of the number of nozzles is: Nozzle for long fiber A: Nozzle for long fiber B = It was 1: 1.45. The single-hole discharge amount of the long fiber A was 1.07 g / (minute / hole), and the single-hole discharge amount of the long fiber B was 0.59 g / (minute / hole).
[0082]
　The web consisting of the deposited mixed long fibers is pressed by a nip roll coated with a non-adhesive material installed on the belt, and the mixed fiber spunbonded non-woven fabric (C-1-1) and (C-2-1) are pressed. ) Was obtained. The weights of the obtained mixed fiber spunbonded non-woven fabrics (C-1-1) and (C-2-1) were 21.7 g / m 2 .
[0083]
　
　According to the manufacturing method of the mixed fiber spunbonded non-woven fabric (C-1-1) and (C-2-1), TPU (A-1): long fiber A polyurethane spunbonded non-woven fabric (D-1-1) having a grain size of 21.7 g / m 2 consisting of only A was obtained. The nozzle diameter of A-1 (long fiber A) was 0.6 mmφ. The stretched air wind speed was 6280 m / min, and the single-hole discharge amount of the long fiber A was 1.22 g / (minute / hole).
[0084]
　 The
　mixed fiber spunbonded non-woven fabric layers (C-1-1) and (C-2-1) are used as outer layers (front surface layer and back surface layer), respectively, and the polyurethane non-woven fabric layer (C) is sandwiched between them. D-1-1) was arranged as an intermediate layer, and a total of three layers were laminated. This was embossed under the following conditions and subjected to a lamination integration process to obtain a three-layer non-woven fabric laminate having an overall basis weight of 65.1 g / m 2 . The embossing conditions are as follows. The heating temperature of both the embossed roll with the embossed area ratio of 18% and the engraved area of ​​0.41 mm 2 and the flat roll was set to 115 ° C. C-2-1) The surface was arranged and embossed.
　The obtained non-woven fabric laminate was evaluated by the method described above. The evaluation results are shown in Table 1.
[0085]
　[Example 2]
　 The
　TPU (A-1) and the thermoplastic resin composition (B-1) are independent of each other. After melting with a 75 mmφ extruder and a 50 mmφ extruder, the resin temperature and die temperature are both 210 ° C, cooling air temperature 20 ° C, and stretched air air velocity using a spunbond non-woven fabric molding machine with a spun cap. Melt-spun by the spunbond method under the condition of 3160 m / min, the mixed fiber mass ratio of the long fiber A made of TPU (A-1) and the long fiber B made of the thermoplastic resin composition (B-1) is 47: Fifty-three webs were deposited on the collection surface. The spinneret has a nozzle pattern in which discharge holes of A-1 (long fibers A) and discharge holes of B-1 (long fibers B) are alternately arranged, and the nozzle diameter of the long fibers A is large. The diameter of the long fiber B is 0.75 mmφ, the nozzle diameter of the long fiber B is 0.6 mmφ, the pitch of the nozzles is 8 mm in the vertical direction and 11 mm in the horizontal direction, and the ratio of the number of nozzles is: Nozzle for long fiber A: Nozzle for long fiber B = It was 1: 1.45. The single-hole discharge amount of the long fiber A was 0.78 g / (minute / hole), and the single-hole discharge amount of the long fiber B was 0.59 g / (minute / hole).
[0086]
　The web consisting of the deposited mixed long fibers is pressed by a nip roll coated with a non-adhesive material installed on the belt, and the mixed fiber spunbonded non-woven fabric (C-1-2) and (C-2-2) are pressed. ) Was obtained. The weights of the obtained mixed fiber spunbonded non-woven fabrics (C-1-2) and (C-2-2) were 20.0 g / m 2 .
[0087]
　 The
　mixed fiber spunbonded non-woven fabric layers (C-1-2) and (C-2-2) are used as outer layers (front surface layer and back surface layer), respectively, and the polyurethane non-woven fabric layer (C) is sandwiched between them. D-1-1) was arranged as an intermediate layer, and a total of three layers were laminated. This was embossed under the same conditions as in Example 1 to carry out laminating and integrating processing to obtain a three-layer non-woven fabric laminate having an overall basis weight of 60 g / m 2 .
　The obtained non-woven fabric laminate was evaluated by the method described above. The evaluation results are shown in Table 1.
[0088]
　[Comparative Example 1]
　 The
　TPU (A-2) and the thermoplastic resin composition (B-1) are independent of each other. After melting using a 75 mmφ extruder and a 50 mmφ extruder, the resin temperature and die temperature are both 210 ° C, cooling air temperature 20 ° C, and stretched air air velocity using a spunbond non-woven fabric molding machine with a spun cap. Melt-spun by the spunbond method under the condition of 3160 m / min, the mixed fiber mass ratio of the long fiber A made of TPU (A-2) and the long fiber B made of the thermoplastic resin composition (B-1) is 47: Fifty-three webs were deposited on the collection surface. The spinneret has a nozzle pattern in which discharge holes of A-2 (long fibers A) and discharge holes of B-1 (long fibers B) are alternately arranged, and the nozzle diameter of the long fibers A is large. The diameter of the long fiber B is 0.75 mmφ, the nozzle diameter of the long fiber B is 0.6 mmφ, the pitch of the nozzles is 8 mm in the vertical direction and 11 mm in the horizontal direction, and the ratio of the number of nozzles is: Nozzle for long fiber A: Nozzle for long fiber B = It was 1: 1.45. The single-hole discharge amount of the long fiber A was 0.78 g / (minute / hole), and the single-hole discharge amount of the long fiber B was 0.59 g / (minute / hole).
[0089]
　The web consisting of the deposited mixed long fibers is pressed by a nip roll coated with a non-adhesive material installed on the belt, and the mixed fiber spunbonded non-woven fabric (C-1-3) and (C-2-3) are pressed. ) Was obtained. The weights of the obtained mixed fiber spunbonded non-woven fabrics (C-1-3) and (C-2-3) were 20.0 g / m 2 .
[0090]
　
　According to the method described in Example 1, TPU (A-2): thermoplastic having a grain size of 20.0 g / m 2 consisting of only long fibers A. A polyurethane spunbonded non-woven fabric (D-1-2) was obtained. The nozzle diameter of A-2 (long fiber A) was 0.6 mmφ. The stretched air wind speed was 4490 m / min, and the single-hole discharge amount of the fiber A was 1.22 g / (minute / hole).
[0091]
　 The
　mixed fiber spunbonded non-woven fabric layers (C-1-3) and (C-2-3) are used as outer layers (front surface layer and back surface layer), respectively, and the polyurethane non-woven fabric layer (C) is sandwiched between them. D-1-2) was arranged as an intermediate layer, and a total of three layers were laminated. This was embossed under the same conditions as in Example 1 to carry out laminating and integrating processing to obtain a three-layer non-woven fabric laminate having an overall basis weight of 60 g / m 2 .
　The obtained non-woven fabric laminate was evaluated by the method described above. The evaluation results are shown in Table 1.
[0092]
　[Comparative Example 2]
　 The
　mixed fiber spunbonded non-woven fabric layers (C-1-2) and (C-2-2) are used as outer layers (front surface layer and back surface layer), respectively, and between them. A mixed fiber spunbonded non-woven fabric layer produced by the same method as in (C-1-2) and (C-2-2) was arranged as an intermediate layer, and a total of three layers were laminated. This was embossed under the same conditions as in Example 1 and subjected to a lamination integration process to obtain a three-layer non-woven fabric laminate having an overall basis weight of 60 g / m 2 .
　The obtained non-woven fabric laminate was evaluated by the method described above. The evaluation results are shown in Table 1.
[0093]
　[Comparative Example 3]
　 The
　TPU (A-2) and the thermoplastic resin composition (B-1) are independent of each other. After melting with a 75 mmφ extruder and a 50 mmφ extruder, the resin temperature and die temperature are both 210 ° C, cooling air temperature 20 ° C, and stretched air air velocity using a spunbond non-woven fabric molding machine with a spun cap. Melt-spun by the spunbond method under the condition of 3160 m / min, the mixed fiber mass ratio of the long fiber A made of TPU (A-2) and the long fiber B made of the thermoplastic resin composition (B-1) is 47: Fifty-three webs were deposited on the collection surface. The spinneret has a nozzle pattern in which discharge holes of A-2 (long fibers A) and discharge holes of B-1 (long fibers B) are alternately arranged, and the nozzle diameter of the long fibers A is large. The diameter of the long fiber B is 0.75 mmφ, the nozzle diameter of the long fiber B is 0.6 mmφ, the pitch of the nozzles is 8 mm in the vertical direction and 11 mm in the horizontal direction, and the ratio of the number of nozzles is: Nozzle for long fiber A: Nozzle for long fiber B = It was 1: 1.45. The single-hole discharge amount of the long fiber A was 0.78 g / (minute / hole), and the single-hole discharge amount of the long fiber B was 0.59 g / (minute / hole).
[0094]
　The web consisting of the deposited mixed long fibers is pressed by a nip roll coated with a non-adhesive material installed on the belt, and the mixed fiber spunbonded non-woven fabric (C-1-4) and (C-2-4) are pressed. ) Was obtained. The weights of the obtained mixed fiber spunbonded non-woven fabrics (C-1-4) and (C-2-4) were 20.0 g / m 2 .
[0095]
　 The
　mixed fiber spunbonded non-woven fabric layers (C-1-4) and (C-2-4) are used as outer layers (front surface layer and back surface layer), respectively, and the above (C-1) is sandwiched between them. A mixed fiber spunbonded non-woven fabric layer prepared by the same method as in -3) and (C-2-3) was arranged as an intermediate layer, and a total of three layers were laminated. This was embossed under the same conditions as in Example 1 and subjected to a lamination integration process to obtain a three-layer non-woven fabric laminate having an overall basis weight of 60.0 g / m 2 .
　The obtained non-woven fabric laminate was evaluated by the method described above. The evaluation results are shown in Table 1.
[0096]
[table 1]

[0097]
　As can be seen from Table 1, the thermoplastic polyurethane-based elastomer (A) and the thermoplastic polyurethane-based elastomer (a) have a storage elastic coefficient of 25.0 MPa or less, and 50 long fibers of the thermoplastic polyurethane-based elastomer (a) are used. The non-woven fabric laminate of the example provided with the intermediate layer which is a spunbonded non-woven fabric layer containing mass% or more has both good stretchability and low-temperature heat-sealing property. On the other hand, the non-woven fabric laminate of the comparative example was inferior to the examples in at least one of the expansion and contraction characteristics and the low-temperature heat-sealing property.
[0098]
　The disclosure of Japanese patent application 2018-193725 is incorporated herein by reference in its entirety. All documents, patent applications, and technical standards described herein are to the same extent as if the individual documents, patent applications, and technical standards were specifically and individually stated to be incorporated by reference. Incorporated herein by reference.
Industrial applicability
[0099]
　The non-woven fabric laminate of the present disclosure is excellent in elasticity and low-temperature heat-sealing property, and can be suitably used for sanitary materials, medical materials, sanitary materials, industrial materials, etc. by taking advantage of these characteristics. Specific examples of sanitary materials include disposable diapers and absorbent articles such as sanitary products, and deployable disposable diapers and pants-type disposable diapers include top sheets, back sheets, and waistbands (extension tape, sides). It can be suitably used for parts such as flaps), fastening tapes, three-dimensional gathers, leg cuffs, and side panels of pants-type disposable diapers. As a sanitary napkin, it can be suitably used for parts such as a top sheet, a back sheet, a wing, and a side leakage prevention cuff. By using the article of the present disclosure in these parts, it is possible to follow the movement of the wearer and fit the wearer's body.
　Further, in the heat-sealing process in the production of sanitary materials such as disposable diapers and sanitary napkins, low-temperature heat-sealing is possible, so that the production can be speeded up and a flexible texture can be maintained.
[0100]
　For medical materials, it can be used in various parts by taking advantage of its moderate elasticity as a ship base cloth, good touch, followability to body movements, and skin care properties, and it also leads to a healing effect. I have high expectations for it. Similarly, the base material for wound care has an appropriate elasticity and can be expected to lead to an action of accelerating the healing of wounds because the adhesion to the affected area is enhanced. Further, the non-woven fabric laminate of the present disclosure has appropriate breathability like a normal non-woven fabric, and further has excellent elasticity, so that the arms, elbows, shoulders, sleeves, etc. of disposable surgical gowns, caps and rescue gowns, etc. It can be expected to be used for parts that require breathability and elasticity, such as movable joints.

The scope of the claims
[Claim 1]
　The surface layer, the intermediate layer, and the back surface layer are provided in this order, and the
　front surface layer and the back surface layer are independently the lengths of the long fibers of the thermoplastic polyurethane-based elastomer (A) and the lengths of the thermoplastic resin (B). It is a spunbonded non-woven fabric layer containing fibers, and the
　intermediate layer is a spunbonded non-woven fabric layer containing 50% by mass or more of long fibers of the thermoplastic polyurethane-based elastomer (a), and is the same as the
　thermoplastic polyurethane-based elastomer (A). A non-woven laminate in which the storage elasticity and the storage elasticity of the thermoplastic polyurethane-based elastomer (a) are independently 25.0 MPa or less.
[Claim 2]
　The nonwoven fabric laminate according to claim 1, wherein the intermediate layer is a spunbonded nonwoven fabric layer containing 80% by mass or more of the long fibers of the thermoplastic polyurethane elastomer (a).
[Claim 3]
　The nonwoven fabric laminate according to claim 1 or 2, wherein the melting point of the thermoplastic polyurethane elastomer (A) and the melting point of the thermoplastic polyurethane elastomer (a) are independently 165 ° C. or lower.
[Claim 4]
　The item according to any one of claims 1 to 3, wherein the heat of fusion of the thermoplastic polyurethane elastomer (A) and the heat of fusion of the thermoplastic polyurethane elastomer (a) are independently 14 mJ / mg or less. Non-woven laminate.
[Claim 5]
　The mixed fiber mass ratio of the long fibers of the thermoplastic polyurethane-based elastomer (A) and the long fibers of the thermoplastic resin (B) in the front surface layer or the back surface layer is 10:90 to 60:40 (however, (however, The non-woven fabric laminate according to any one of claims 1 to 4, wherein A) + (B) = 100% by mass).
[Claim 6]
　The nonwoven fabric laminate according to claim 5, wherein the mixed fiber mass ratio is 50:50 to 60:40 in terms of mass ratio.
[Claim 7]
　The nonwoven fabric laminate according to any one of claims 1 to 6, wherein the thermoplastic resin (B) contains a propylene-based polymer.
[Claim 8]
　The thermoplastic resin (B) is composed of a propylene-based polymer and high-density polyethylene, and the content of the propylene-based polymer is 80% by mass to 99 with respect to the total of the propylene-based polymer and the high-density polyethylene. Any one of claims 1 to 7, wherein the content of the high-density polyethylene is 1% by mass to 20% by mass with respect to the total of the propylene-based polymer and the high-density polyethylene. The non-woven laminate according to.
[Claim 9]
　A stretchable nonwoven fabric laminate obtained by stretching the nonwoven fabric laminate according to any one of claims 1 to 8.
[Claim 10]
　A textile product containing the nonwoven fabric laminate according to any one of claims 1 to 8 or the stretchable nonwoven fabric laminate according to claim 9.
[Claim 11]
　An absorbent article comprising the nonwoven fabric laminate according to any one of claims 1 to 8 or the stretchable nonwoven fabric laminate according to claim 9.
[Claim 12]
　A sanitary mask comprising the nonwoven fabric laminate according to any one of claims 1 to 8 or the stretchable nonwoven fabric laminate according to claim 9.