The present invention concerns the technical area of ​​the fibers or filaments with an absorption capacity of acid gases and / or basic, in particular related to odors from perspiration.

When playing sports, physical exertion increases the body temperature which causes a larger sweating at rest and a production volatile odorants. The first textile layer that a user wears during practice of a sport is the preferred receptor sweat and odor molecules in particular from the degradation of the proteins contained in sweat by bacteria present on the skin. This textile layer retains these odor molecules and thus smells after a workout, especially when dry, which requires washing before the next meeting. It is even common for a textile layer of polyester gives off bad odors already-during the workout.

This poor vis-à-vis behavior of textile polyester odors meet generally when the textile is in contact with the sweat of the wearer without the latter carries necessarily a sport.

Textile materials do not react the same way vis-à-vis the odors. Natural materials, including wool base, feel little, if any, bad odors, especially related to perspiration.

The existing solutions today to reduce malodor synthetic textiles, especially polyester, are either to remove said odor absorption and / or destruction and / or said masking odors, or eliminate the bacteria responsible for the synthesis of odorant molecules .

To overcome these drawbacks, use of textiles made from fibers and / or filaments Adjusted function (s) with cage molecules of cyclodextrin, or carbon nanoparticles, bamboo or coconut, or they used coffee-based fibers. But these solutions are not sustainable since the functionalizing agents are eliminated as and washes, and / or have limited effectiveness in addition to odor absorption and / or modify the properties touch textiles for example in the stiffening regarding particular cyclodextrins.

Another solution is to introduce odor absorbing materials, such as natural fibers, for example cotton in the polyester-based textiles. But this solution has the disadvantage that it is expensive and does not allow rapid drying of the textile article and thus also accelerated evacuation of sweat. However, drying properties and rapid evacuation of sweat are particularly sought after in the case of technical textiles for the practice of a sport. Moreover, cotton tends to pill.

It is also possible to have antibacterial agents on the fabric articles, such nanometal silver, copper, zinc oxide, titanium oxide, zirconium oxide or platinum. However, these antibacterial agents act directly on the bacteria that are in contact with the skin. This solution is valid only for textile articles to be worn very close to the body, such as socks, but is not valid, or much less, for T-shirts, for example. In addition, the legislation on biocides is becoming stricter as affecting the skin bacterial flora.

EP 0792957 Bl discloses the manufacture of a fiber having acidic gas absorption properties and basic at the same time via the carboxylic groups (-COOH) and carboxylate groups (-COO-)

complexed with a metal salt, e.g. a sodium salt, in order to remove odors (see [0002]). This fiber is obtained by modifying a base fiber comprising more than 40% by weight of polyacrylinotrile (PAN) with hydrazine (NH2-NH2) to crosslink it and increase its nitrogen content between 1% and 8% its total weight. The remaining nitrile groups on said fiber are then hydrolyzed using a basic solution of a metal salt, eg sodium or potassium hydroxide. The fiber is then immersed in a nitric acid solution for 30 minutes and then washed (see Example 1 [0048]).

The process described in EP 0792957 Bl only applies to a fiber polyacrylonitrile obtained by definition coagulation polyacrylonitrile (PAN) and spinning the latter. The fibers obtained have a pinkish coloration and does not stain, or are very difficult. In addition, these fibers do not have sufficient toughness to constitute only a thread, it is necessary to use them in combination with other fibers and / or filaments to overcome their limited mechanical properties. Or the mixture of acrylic fibers with synthetic fibers such as polyester fibers, for example, is complex because of the dyeing problems (acrylic fibers are often blended with wool and do not withstand a temperature higher than 100 ° VS). Moreover,

Finally, technical articles in sport are mainly in synthetic materials such as polyester or polyamide and not based on cotton or viscose or acrylic fibers for reasons of cost and efficiency in terms of speed of drying and moisture management but also ease implementation, particularly with regard to mechanical performance and dyeing.

There is thus a need for fibers or filaments, in particular based on polyethylene terephthalate, overcomes the aforementioned problems,

including absorbing odors and / or neutralizing and sustainably despite the washes, which are inexpensive to manufacture, able to be (es) and son out in the form of textile fabric and easy to dye.

Purpose and Summary of the Invention

The present invention thus provides, in a first aspect, a filament or a fiber absorbing odorants including acid gas (s) and / or base (s), having an outer surface defined at least a portion of said surface comprises carboxylic groups -COOH and / or -COO groups carboxylate " complexes with metal salts. Advantageously, said portion is comprised of a matrix resulting from the reaction of a mixture comprising a polyester, a first copolymer of at least one olefin and (meth) acrylate and / or (meth) acrylic acid (a) and a second (co) polymer comprising oxirane groups -C 2 H 3O (B), at least part of functions of (meth) acrylic or (meth) acrylates of copolymer (A) having been converted into the corresponding carboxylate functions and / or corresponding carboxylic acids.

Advantageously, the fiber or filament according to the invention comprises a portion of its outer surface made of a polyester combining a first polymer matrix (A) and a second polymer (B), the first copolymer (A) provides functions (meth ) acrylates which are converted completely or partly into carboxylic functions -COOH and / or -COO carboxylates functions ". The first copolymer (A) may also comprise acrylic functions providing the COOH carboxylic functions necessary and requiring no processing to absorb basic gas through acid-base reactions. The second polymer (B) makes it possible to embed the first polymer (A) stably in said matrix and to adjust the viscosity of the matrix, in particular so that it is capable of being extruded-spun.

Advantageously, the (meth) acrylates in said portion having undergone steps of saponification and / or acidification and / or complexation described below form said carboxylic groups (-COOH) corresponding and / or said carboxylate groups (-COO ) corresponding complexes with metal salts.

The main mechanism involved in the absorption of gas is based on the carboxylic functions supported by the fiber or filament that will react with the basic gas and / or on supported carboxylate functions which will react with acid gases. It is also envisaged that polar interactions and hydrogen bonds develop between the carboxylic and acid gases. As regards the acid gases, deodorization of the acid gas, e.g., acetic acid, is obtained by salification, by entrapping the acid gas in the form of a non-volatile metal carboxylate (e.g., by creating (CH 3 COO ~ , M + ) wherein M +is a metal salt with respect to acetic acid). Regeneration of the fiber or filament may be obtained by washing (domestic wash textile article comprising said fibers and / or filaments)

The acid gas absorbing properties (s) and / or base (s) of the fiber or filament are related to the intrinsic structure of the fiber or filament which ensures action vis-à-vis odor perennial unlike chemical treatments of the prior art.

Advantageously, the second (co) polymer (B) performs the function of a coupling agent between the polyester matrix and the first copolymer (A by chemical bonds (especially by covalent bonding) and / or polar bonds.

It was observed by scanning electron microscope of a cross section of a filament according to the invention that the polymers A and B form of nodules in the polyester matrix, the polymer A being as encapsulated by the polymer B, wherein polymer B thus forms the physical interface between the polymer A and the polyester matrix.

In addition, reactive oxirane groups in the second (co) polymer used to develop a reactivity with the polyester matrix via polar bonds and / or covalent. Advantageously, the polyester matrix into the polyester chain ends which include carboxylic acid functions (COOH) react with oxirane groups, in particular glycidyl (meth) acrylate polymer B. The second (co) polymer (B) should thus advantageously have a chemical structure "compatible", that is to say capable of being implemented with the first copolymer (a) and the polyester matrix in a reaction extrusion spinning.

According to one embodiment, the polymer B is a copolymer of at least one olefin and at least one monomer unit comprising an oxirane group.

The presence of olefin monomer units in the polymer chain of the second (co) polymer (B) generates a "polyolefin" backbone which very significantly improves the compatibility with the first copolymer (A) also having a skeleton "polyolefin" . According to one embodiment, the polymer B is a copolymer of at least one monomer unit comprising an oxirane group, and (meth) alkyl acrylates, and optionally at least one olefin. Advantageously, the polymer B and also brings acrylates functions including some or all of these acrylates functions are transformed into the corresponding carboxylate functions and / or corresponding carboxylic acids.

Preferably, the ratio of the mass (g) of the polyester in the matrix relative to the total weight of the matrix is ​​greater than or equal to 50%, more preferably greater than or equal to 60%, even more preferably greater than or equal to 70%, particularly greater than or equal to 75%, more particularly greater than or equal to 80%, even more particularly greater than or equal to 85%, optionally greater than or equal to 90%.

The ratio of the weight of the first copolymer (A) relative to the mass of the second (co) polymer (B), (A) / (B) introduced into the matrix, is between 10/90 and 95/5, preferably between 50/50 and 95/5, more preferably still between 70/30 and 90/10, especially between 85/15 and 90/10.

According to one embodiment, the mass fraction in

(Meth) acrylate into the first copolymer (A), and optionally in the second (co) polymer (B), 20% is greater than or equal, more preferably greater than or equal to 25%. This value can be measured by infrared spectroscopy, Fourier transform.

Preferably, the polyester and / or first copolymer of at least one olefin and (meth) acrylate and / or (meth) acrylic acid (A) and / or the second (co) polymer comprising oxirane groups -C 2 H 3 0 (B) is / are thermoplastic (s), in particular it (s) has / have a melting temperature (Tm) for their implementation by extrusion, in particular by extrusion granulation (compoudage) and extrusion-spinning.

Preferably, the melting temperature of the first copolymer (A) and optionally of the second (co) polymer (B) is greater than or equal to 55 ° C, more preferably less than or equal to 180 ° C, even more preferably less or equal to 140 ° C, particularly less than or equal to 100 ° C, still more preferably less than or equal to 80 ° C.

Preferably, the first copolymer flexural modulus (A) and optionally of the second (co) polymer (B) is greater than or equal to 5 MPa, more preferably greater than or equal to 7 MPa. The flexural modulus can be measured with the method described in ISO 178: 2010 or in ASTM D790 D1525 on compression molded samples.

Preferably, the Vicat softening point under 10 N of the first copolymer (A) and optionally of the second (co) polymer (B) is less than or equal to 60 ° C, more preferably less than or equal to 50 ° C, even more preferably less than or equal to 40 ° C. The Vicat softening point can be measured with the method described in ISO 306: 2004 or

in ASTM D1525 on compression molded samples.

Preferably the Melt Flow Index (190 ° C / 2.16 Kg) of the first copolymer (A) and optionally of the second (co) polymer (B) is greater than or equal to 2 g / 10 min.

The titles (dtex denier) indicated in this text can be measured using the NF EN ISO 2060 June 1995.

Refers in the sense of the present invention, "polyester" means any polymer resulting from the condensation of a polyol, particularly a diol, and an aromatic carboxylic polyacid (s), in particular an aromatic carboxylic diacid (s).

Preferably, the polyester according to the invention is selected from: polyethylene terephthalate, polytetramethylene terephthalate, polycyclohexane-dimethylene of a dicarboxylate or polyethylene naphthalene 2,6, more preferably it is polyethylene terephthalate. Other polyesters can be used, such as homopolymers, copolymers, terpolymers, and mixtures of monomer units selected from the list consisting of: ethylene terephthalate, propylènetéréphtalate, butylene terephthalate, and 1,4 cyclohexylene dimethylènetéréphtalate, particularly ethylene terephthalate.

Preferably, the polyester according to the invention is in a degree configured to be spun for processing into thread.

Refers in the sense of the present invention, "polyol" means any compound comprising at least two hydroxyl functional groups (-OH), particularly any compound (diol) comprising only two hydroxyl groups (-OH).

Refers in the sense of the present invention, "aromatic carboxylic polyacid (s)" means any compound comprising at least two carboxylic acid functional groups (-COOH) and at least one aromatic ring, in particular any compound comprising only two carboxylic acid functional groups and least one aromatic ring (aromatic dicarboxylic acid (s)).

Refers in the sense of the present invention, "acid gas" means any gas capable of reacting with carboxylate functional groups (-COO) in an acid-base reaction, and "basic gas" means any gas capable of reacting with the acid functions (-COOH) in an acid-base reaction.

Preferably, the gas or the acid (s) is / are selected (s) from the list comprising: propionic acid, formic acid, butyric acid, benzothiazole, acetic acid, valeric acid , dodecanoic acid, octanoic acid, nonanoic acid, more preferably it is acetic acid.

Preferably, the or basic gas (s) is / are selected (s) in the list consisting of: amines such as trimethylamine, methylamine, ethylamine, triethylamine, propylamine; diethylamine, pyrazine, ammonia, aniline, more preferably it is ammonia.

One meaning of this invention, "filament", any element textile elongated indefinite length because theoretically unlimited.

On entend au sens de la présente invention by "fiber" tout élément textile rangy length définie, car Reproduction, en particulier share of a fiber courte ou d'une longue fibers.

Refers in the sense of the present invention, the term "wire", a spun fiber yarn, a monofilament yarn (single filament), a multifilament yarn and the mixture thereof.

Refers in the sense of the present invention by salt any metal salt comprising a cationic metal part (M n + ) (n is an integer greater than or equal to 1) and an anionic portion (possibly non-metallic), the total negative charge neutralized load the cationic metal part, preferably the metal salts are chosen from: salts of potassium (K + ), sodium salts (Na + ), calcium salts (Ca 2+ ), magnesium salts (Mg 2+ ), aluminum salts (Al 3+ ), and the silver salt (Ag + , Ag 2+ , Ag 3+ ).

meaning means of the present invention, "copolymer" means any polymer comprising at least two different monomer units which are repeated at regular or irregular intervals (random) of chain of said copolymer. When the copolymer contains three different monomer units, it is more particularly a terpolymer.

Meaning means of the present invention, "olefin" means any repeating monomeric unit of olefin of the formula - (CH 2 -CRiR 2 ) n- wherein R and R 2 represent, each independently of one another a hydrogen atom or an alkyl group, preferably linear or branched acyclic, preferably a hydrogen atom. Said alkyl group can comprise from one to ten carbon atoms, more preferably one to six carbon atoms, including one to four carbon atoms. The alkyl groups are preferably: methyl -CH 3 ; ethyl -CH 2 -CH 3 or, a propyl group (n-propyl or isopropyl), butyl, such as n-butyl, sec-butyl, isobutyl or tert-butyl, pentyl group, hexyl group, heptyl group, octyl group , a nonyl group, a decyl group.

The first copolymer (A) and / or the second (co) polymer (B) according to the invention is / are a syndiotactic polymer, isotactic or atactic.

Refers in the sense of the present invention, "(meth) acrylate" means any unit acrylate monomer of formula - (CH 2 -C (CH 3 ) COO (Ri)) - or - (CH 2-CHCOO (Ri)) - wherein the group R is an alkyl chain, preferably saturated, linear or branched, more preferably acyclic, more preferably comprising 1 to 20 carbon atoms (C1-C20), more preferably C1-C15, more preferably C1-C10, more preferably C1-C8, even more preferably C1-C4, particularly a methyl group. Preferably, the alkyl (meth) acrylate is chosen from methyl (meth) acrylate, (meth) acrylate, (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate or octyl (meth) acrylate, 2-ethylhexyl acrylate.

The fact that the methyl group is indicated as follows (meth) in the present text means that the latter is considered to be optional.

One meaning of this invention, "acid

(meth) acrylic "means any monomeric unit of the formula - (CH 2 -C (CH 3 or H) COOH) -.

Refers in the sense of the present invention, "thermoplastic" means any (co) polymer having a melting temperature Tf and adapted to be transformed by extrusion. Tm melting temperature can be measured with the method described in ISO 11357-3: 2011.

Meaning means of the present invention by "oxirane" group of the formula -C 2 H 3 O. This group may be supported by a glycidoxy group itself supported by one or more unit (s) monomer (s) repetitively (s) present different (s) in the polymer chain of the second (co) polymer (B). Preferably the monomer unit is a glycidyl (meth) acrylate

Preferably, the oxirane group is provided by one monomer unit selected from glycidyl acrylate, glycidyl methacrylate (GMA) and glycidyl vinyl ether, preferably glycidyl acrylate and glycidyl methacrylate (GMA).

Alternatively, the metal salt is a salt of one or more Met (al) (in) chosen (s) from the group consisting of the following metals: potassium (K), sodium (Na) (especially following the saponification), calcium (Ca), magnesium (Mg), aluminum (Al) and silver (Ag) (especially following the complexation) or mixtures thereof.

Alternatively, the first olefin copolymer and (meth) acrylate or (meth) acrylic acid (A) and optionally said second (co) polymer (B) is (are each) an elastomer . Alternatively, the second polymer comprising oxirane groups is a

terpolymer of at least one olefin, (meth) acrylate or (meth) acrylic acid, and a monomer unit having an oxirane group, in particular a terpolymer of ethylene, (meth) acrylate alkyl or (meth) acrylic acid, and glycidyl (meth) acrylate.

Alternatively, the filament or fiber according to the invention comprises first and second non-blended polymeric structures, the first structure being said matrix.

Preferably, the weight of the first polymeric structure with respect to the total weight of said fiber or said filament is less than or equal to 30% and greater or equal to 0%, in particular less than or equal to 20%, more particularly less than or equal to 10%.

Preferably, the weight of the second polymeric structure with respect to the total weight of said fiber or said filament is greater than or equal to 50%, in particular greater than or equal to 70%, more particularly greater than or equal to 80%, in particular greater or equal to 90%.

This arrangement optimizes the mass proportion of functional matrix according to the invention gas absorbent, and therefore the final cost.

Advantageously, the first and second polymeric structures are co-extruded and spun but form two distinct structures in the fiber or filament.

Alternatively, the second polymer structure comprises at least one polymer selected from the list comprising: polyamide 6, polyamide 6/6, polyamide 12, polyamide 11, polyamide 4-6, polyester (especially polyethylene terephthalate), polypropylene, and polyethylene, or a combination thereof.

Preferably, said one or more polymers represent (s) at least 85 mass%, more preferably at least 90% by weight, especially at least 95% by weight of said second polymeric structure.

Alternatively, said filament or said fiber has a heterogeneous cross-section of the heart-coat type, said mantle being

consisting of said matrix (or said first polymeric structure), preferably the heart is made of said second polymeric structure.

The fiber or filament according to the invention may have any arrangement observed along its cross-section as long as she / it comprises at least a portion of its surface as defined according to the invention. In particular, the fiber or filament according to the invention may be of the heart-coat type, with a cylindrical or multilobed heart and a coat matching the shape of the heart or on the contrary independently substantially cylindrical or multilobed.

Alternatively, the ratio of the sum of the mass of the first copolymer (A) and the mass of the second (co) polymer (B) to the total mass of the matrix is ​​less than or equal to 20%, preferably less than or equal to 15%.

The present invention relates to in a second aspect, an extrudable-spinnable composition for the manufacture of at least a portion of the outer surface of a filament or fiber such (on) defined (e) according to any one of embodiments described with reference to the first aspect of the invention, said composition being derived from the reaction of the mixture comprising a polyester, a first copolymer of at least one olefin and (meth) acrylate or (meth) acrylic acid, and a second (co) polymer comprising oxirane -C2H3O groups, the proportion by weight of said polyester based on the total weight of said mixture being greater than or equal to 50%, more preferably greater than or equal to 60%, particularly greater than or equal to 70%,more particularly greater than or equal to 80%, especially greater than or equal to 85%.

Preferably, the extrudable-spinnable composition according to the invention is in the form of granules, chips, flakes, or powder.

The spinnable-extrudable composition of the invention may be prepared by reactive extrusion by mixing in the molten state in extruders (single or twin), co-Buss kneaders, preferably in extruders

twin screw co-rotating.

Advantageously, the composition according to the invention is prepared before the step of (co) extrusion-spinning (i), defined below with reference to a third aspect of an extruder-reactor at a step of extrusion-granulation (also known as compounding). This compounding step is carried out within the framework of the invention preferably in an extruder comprising at least two conveying screws rotating co-rotatably with different zones adapted to be heated independently of each other. These include two screw co-rotating extrusion penetrating in the same direction in the bore of a fixed environment, called sheath, and no

Preferably, during the step of extrusion-granulation for the preparation of the extrudable-spinnable composition according to the invention, the extrusion die / extruder comprises at least one temperature zone having a temperature greater than or equal to 200 ° C, more preferably greater than or equal to 220 ° C, preferentially greater than or equal to 240 ° C, especially greater than or equal to 250 ° C, especially less than or equal to 300 ° C.

The reactive extrusion step as well comprises a prior step of the polyester mixture of the first copolymer (A) and the second (co) polymer (B), a reaction step carried out by successively shear and depression operations on the mixture supplied by the screw conveyor. All these steps are performed on a continuous extrusion reactor comprising at least two screws routing. The extruder forming a continuous reactor comprises a first zone of introduction of polyester and polymers (A) and (B). The polymers (A) and (B) can be incorporated at the same input or at separate inputs. Preferably, one or more entries are

provided, the extruder is fed independently at each of the starting materials used (polyester, polymers (A) and (B)). The starting components feed rate is controlled independently. Polyester and polymers (A) and (B) are introduced into the extruder at warm or at room temperature. They can be introduced in solid form, particularly in the form of granules, flakes, powder or any other solid form, or in the molten state.

The reactive-extrusion step may be performed as described in FR 2897356 Al. Preferably, the reaction between the polyester, the first copolymer (A) and the second (co) polymer (B) is a reaction in homogeneous phase.

The extrudable-spinnable composition according to the invention may comprise various additives facilitating the implementation of said extrudable composition-spinnable, in particular sliding agents such as silica, Ν, Ν'-ethylene bis-amide, stearate calcium or magnesium stearate. Said additives may be inorganic fillers, coloring pigments, anti-UV or antioxidants.

Alternatively, the extrudable-spinnable composition according to the invention has a melt flow index, particularly referred to as M FI (particularly measured according to ISO 1133-1 February 2012 or ASTM D 1238 and August 2013, a temperature of 270 ° C under a 2.16 kg weight) greater than or equal to 10 cm 3 /10 min, preferably greater than or equal to 20 cm 3 /10 min, more preferably greater than or equal to 30 cm 3 / 10 min, preferably greater than or equal to 40 cm 3 /10 min, in particular greater than or equal to 45 cm 3 /10 min, especially less than or equal to 100 cm 3 /10 min.

The present invention has for object according to a third aspect, a method of manufacturing a filament or fiber according to any of the embodiments described with reference to the first aspect of the invention, comprising the steps of:

i) a step of spinning extrusion of the composition defined in reference to the second aspect of the invention, or

a step of co-extrusion spinning of the composition defined in reference to the second aspect of the invention for forming a first polymeric structure forming a matrix and at least one polymer composition (particularly extrudable and spinnable) for forming at least one second polymeric structure, for obtaining a fiber or filament;

ii) optionally at least one step of stretching said filament or said obtained fibers (e) in step (i);

iii) optionally a shaping step of said filament or said fiber for the manufacture of a textile article;

iv) a step of processing by hydrolysis of (meth) acrylates of alkyl carboxylate groups (-030 " ) by immersion of said fiber or said filament (obtained (e) after step (i) or (ii)) or said textile material in a basic bath for training;

v) optionally a step of drying said filament or said fiber or said textile article.

Preferably, the fiber, filament or the textile article undergoes a dyeing step prior to the drying step.

Preferably, said first and second polymeric structures are not mixed.

Preferably, the step of (co) extrusion-spinning (i) is carried out on a single screw extruder and then the molten material is passed through the orifices of a die. The filament exiting the die then undergo at least one drawing step, as described below. The stretching step in the context of the invention may be effected in known manner by those skilled in the art.

The fiber or filament according to the invention may be (an) implemented

according to techniques known to those skilled in the art, such as via a stretching step POY deviation (Partially Oriented Yarn) or FDY (Full Drawn Yarn) after the POY type step or directly during the step of Type POY adding a stretching step in the machine performing the operation of POY kind. The filaments or fibers having undergone POY type of step can then undergo a step of texturing the type DTY (Drawn Textured Yarn) or ATY (Air Textured Yarn, Taslan).

Preferably, the forming step of said filament or said fiber for the manufacture of a textile article may comprise a step of knitting, weaving one step, a step of braiding a step of making a nonwoven, or combination thereof, optionally a heat-setting step said textile article to dimensionally stabilize the article.

meaning means of the present invention by "bath basic" means any aqueous solution having a pH greater than or equal to 6, more preferably greater than or equal to 7, more preferably still greater than or equal to 8, in particular greater than or equal to 10, even more particularly greater than or equal to 12.

In particular, the aqueous solution is an aqueous solution comprising a solution of a metal salt according to the invention, such as sodium and / or potassium hydroxide. Carboxylic functions and / or acrylate functions supported by the polymer A, polymer B and optionally, are converted into carboxylate functional groups (-COO) complexed by the metal salt present in the aqueous solution of saponification.

Preferably the hydrolysis step is carried out by immersing the fiber or filament or textile article to be treated Full bath, said bath having a temperature greater than or equal to 40 ° C, especially greater than or equal to 60 ° C, more particularly greater than or equal to 80 ° C, especially less than or equal to 95 ° C for at least 1 minute, particularly at least 30 minutes, and preferably at most 50 minutes.

This dipping step Full bath is followed by a step of padding of passing the textile product treated between two rollers in order to remove the excess solution.

This saponification step is preferably followed by a fiber rinsing step, the filament or the textile article with water, especially at room temperature (particularly a temperature greater than 0 ° C and less than or equal to 40 ° C), for example with running water. This step may be followed by drying, for example by hot air or microwaves.

Preferably, following the hydrolysis step (by saponification) and the drying step, the fiber, the filament or the textile article has lost at least 1% of its mass, in particular at least 2% of its mass, more preferably at most 8% of its original total weight before hydrolysis.

Refers in the sense of the present invention, "textile article" means any article comprising a textile element resulting from the shaping of a fiber and / or filament according to the invention.

Alternatively, the method comprises an acidification step vi) taking place after step iv) by immersing said fiber or said filament or said textile article in an acid bath.

This acidification step serves to convert all or part of carboxylate groups formed during the hydrolysis to carboxylic groups.

Preferably, the concentration of ions H + of the acid solution is determined according to the proportion of carboxylate functions which it is desired into acid functional groups and therefore absorption properties in acidic or basic referred gas.

meaning means of the present invention, "acid bath" means any aqueous solution having a pH less than or equal to 6, more preferably less than or equal to 5, even more preferably less than or equal to 4.

In particular, the aqueous solution is an aqueous solution

comprising an acid, especially a mono or polycarboxylic acid, for example acetic acid, or a strong acid such as hydrochloric or sulfuric acid or phosphoric acid.

Preferably the acidification step is carried out by immersing the fiber, filament or fabric article treating Full bath, said bath having a temperature greater than or equal to 10 ° C, especially less than or equal to 60 ° C, more particularly less than or equal to 40 ° C, especially at room temperature for at least 1 minute, particularly at least 10 minutes, and preferably at most 30 minutes.

This immersion step Full bath, including padding, is followed by a step of squeezing of passing the textile product treated between two rollers in order to remove the excess solution.

This acidification step is preferably followed by a fiber rinsing step, the filament or the textile article with water, particularly at ambient temperature, for example with running water. This step may be followed by drying, for example carried out on a hot air ream.

Alternatively, the method comprises a step of applying at least one metal salt (as defined herein) or said filament to said fiber or said textile article during step iv) hydrolyzing said then basic bath comprising at least one metal salt and / or in an additional step vii) complexation, in particular by applying a solution of at least one metal salt (as defined herein) said filament or said fiber .

The metal salt present in the basic bath (for example sodium hydroxide or potassium) in the hydrolysis step and hence saponification, can thus be replaced by the following in a complexation step with another metal salt as required in absorption of targeted gases.

When the metal salts are present in the bath in the hydrolysis step (iv) the carboxyl groups are totally or partially hydrolyzed

and complexed with the metal salts according to the concentration of metal salts in the solution.

Preferably, the concentration of metal salt is determined in the hydrolysis bath (iv), and optionally complexing (vii) so that only a part, preferably half in number of the carboxylic groups are hydrolyzed and complexed with salts metal so that the fiber and / or filament is / are adapted (s) to absorb basic gas and acidic both.

Advantageously, the metal salts used in the complexing step are selected from the following salts: Ca, Mg, Al, and Ag or mixtures thereof.

The present invention provides, in a fourth aspect, a fabric article comprising at least 5% by weight based on the total weight of the filament and / or fiber according to any of the embodiments described with reference to the first aspect according to the invention.

Alternatively, the fabric article further comprises fibers and / or synthetic filaments, in particular fibers and / or filaments selected from the group consisting of: polyester, polyamide, and polypropylene or mixtures thereof.

The present invention provides, according to a fifth aspect, an article of acidic gases and / or basic absorbent sports comprising a textile article according to any of the embodiments described with reference to a fourth aspect of the invention, selected especially from the following articles or considered alone or in combination: a backpack, a duffel bag, a clothing item such as a vest, pants, shorts, underwear, a glove, a sock , a legging, a shoe, a component of a shoe, such as insole, an inner lining, or a rod.

The present invention has for object according to a fourth aspect, the use of the composition extrudable-spinnable according to any of embodiments with reference to the second aspect of the invention for the manufacture of a fiber or a filament according to any of embodiments with reference to the first aspect of the invention.

Brief Description of Drawings

The invention will be better understood from reading the following description of embodiments of the invention given as non-limiting examples, with reference to the accompanying drawings, wherein:

- Figure 1 is a schematic representation of the first polymer A used for the manufacture of a filament according to the invention in the embodiments described below, it is a copolymer of ethylene and acrylate methyl;

- Figure 2 is a schematic representation of the second polymer (B) used for producing a filament according to the invention in the embodiments described below, it is a terpolymer of ethylene, of methyl acrylate and glycidyl methacrylate;

- Figure 3 shows schematically how the polyethylene terephthalate;

- Figure 4 shows schematic of how the grafting of the second polymer B shown in Figure 2 of the polyester shown in Figure 3 during the reactive extrusion;

- Figure 5 shows schematically the saponification of methyl acrylates functions of the first polymer A shown in Figure 1;

- Figure 6 schematically shows the acidification of the carboxylate functions of the first polymer A saponified.

Detailed description of embodiments

I- Preparation of extrudable-spinnable composition according to the invention

An extrudable-spinnable composition according to the invention in the form of granules is prepared by mixing the polyester (thermoplastic) in granule form with first and second copolymers (A, B) according to the invention also in the form of granules. The pellet mixture was fed to an extruder feed hopper comprising two feed screws of the material that are co-rotating, at a rate of about 50 g / min. The components are thus in the extruder where they are melted, mixed and dispersed. This step is a reactive extrusion step because the carboxylic acid functions (COOH) in the polyester chain ends react with the oxirane groups, especially glycidyl, of the second polymer (B). The output material from the extruder forms a ring of about 3 mm diameter which is immediately cooled with cold water or at room temperature. The rod is then fed into a pelletizer device which drives the ring formed at a constant speed and forms granules by cutting the rod. The extruder comprises at least five distinct zones of their heating temperatures: a first zone of feed of the starting components at room temperature therefore in solid form, in this example in the form of granules; a second zone of fusion, in which the starting components store heat and begin to melt, a third zone corresponding to a first kneading in which the starting materials are sheared and out completely melted to said third region; a fourth zone corresponding to a second-kneading in which the starting materials are dispersed, a fifth zone corresponding to the end of the twin-screw wherein the mixed starting components and dispersed are extruded through an extrusion die, comprising in this specific example a single orifice to form a ring. One of the two feed screws and comprises a not reverse at least in the fifth step the area of ​​the other zones in order to disperse the starting components in the molten state. The extruder is heated from both sides of each area thus represents six independent separate heating stages. The twin-screw is in this specific example a screw Rheomex PTW 16/25 OS coupled with a motor Rheodrive 7 OS - 3 * 400V marketed by ThermoScientificHaake. a fifth zone corresponding to the end of the twin-screw wherein mixed and dispersed starting materials are extruded through an extrusion die, comprising in this specific example a single orifice to form a ring. One of the two feed screws and comprises a not reverse at least in the fifth step the area of ​​the other zones in order to disperse the starting components in the molten state. The extruder is heated from both sides of each area thus represents six independent separate heating stages. The twin-screw is in this specific example a screw Rheomex PTW 16/25 OS coupled with a motor Rheodrive 7 OS - 3 * 400V marketed by ThermoScientificHaake. a fifth zone corresponding to the end of the twin-screw wherein mixed and dispersed starting materials are extruded through an extrusion die, comprising in this specific example a single orifice to form a ring. One of the two feed screws and comprises a not reverse at least in the fifth step the area of ​​the other zones in order to disperse the starting components in the molten state. The extruder is heated from both sides of each area thus represents six independent separate heating stages. The twin-screw is in this specific example a screw Rheomex PTW 16/25 OS coupled with a motor Rheodrive 7 OS - 3 * 400V marketed by ThermoScientificHaake. comprising in this specific example a single orifice to form a ring. One of the two feed screws and comprises a not reverse at least in the fifth step the area of ​​the other zones in order to disperse the starting components in the molten state. The extruder is heated from both sides of each area thus represents six independent separate heating stages. The twin-screw is in this specific example a screw Rheomex PTW 16/25 OS coupled with a motor Rheodrive 7 OS - 3 * 400V marketed by ThermoScientificHaake. comprising in this specific example a single orifice to form a ring. One of the two feed screws and comprises a not reverse at least in the fifth step the area of ​​the other zones in order to disperse the starting components in the molten state. The extruder is heated from both sides of each area thus represents six independent separate heating stages. The twin-screw is in this specific example a screw Rheomex PTW 16/25 OS coupled with a motor Rheodrive 7 OS - 3 * 400V marketed by ThermoScientificHaake. side of each area thus represents six independent separate heating stages. The twin-screw is in this specific example a screw Rheomex PTW 16/25 OS coupled with a motor Rheodrive 7 OS - 3 * 400V marketed by ThermoScientificHaake. side of each area thus represents six independent separate heating stages. The twin-screw is in this specific example a screw Rheomex PTW 16/25 OS coupled with a motor Rheodrive 7 OS - 3 * 400V marketed by ThermoScientificHaake.

Beforehand, the granulated polyester were heated at 90 ° C for 16 hours in order to minimize the moisture content and thus possibly the subsequent hydrolysis of the polyester chains.

The initial parameters of the extruder are as follows: the torque is 65 Nm, the speed of rotation of the screw was 450 revolutions / min, the feeding speed of the screw at the first zone is 12 %, the pressure in the die was 5.7 bar, the temperature of the material is of the order of 260 ° C and the die temperature is around 245 ° C. The six temperature levels are respectively in the order from the first region to the sixth zone: 165 ° C, 274 ° C, 274 ° C, 270 ° C, 260 ° C and 255 ° C.

The first copolymer A is a copolymer of ethylene and methyl acrylate having a proportion of methyl acrylate, about 29 wt%, a melt index (190 ° C / 2.16 Kg) of the order of 2 -3.5 g / 10min (ISO 1133 - February 1, 2012 / ASTMD1238 - August 2013); a melting point of 61 ° C (ISO 11357 - March 3, 2013); average molecular weight Mw of 105 213 g / mol and average molecular weight Mn is 16 322 g / mol, a Vicat softening point less than 40 ° C (ISO 306 January 2014 / ASTMD 1525, 2017 2009), and a breaking elongation of 900% (ISO 527-2 April 2012 / ASTM D638 2014).

The second copolymer B is a terpolymer of ethylene, methyl acrylate and glycidyl methacrylate having a proportion of methyl acrylate in the range of 24 mass%, a proportion by mass of glycidyl methacrylate in order 8% by weight, a melt index (190 ° C / 2.16 Kg) of about 6 g / 10min (ISO 1133 - February 1, 2012 / ASTMD1238 - August 2013); a melting point of 65 ° C (ISO 11357 - March 3, 2013); average molecular weight Mw of 103 499 g / mol and the mean molar mass Mn is 16,491 g / mol, a point

Vicat softening below 40 ° C (ISO 306 January 2014/15252017 or ASTM D 2009), and a break of 1100% elongation (ISO 527-2 April 2012 / ASTM D638 2014).

The polyester is selected as extrudable-spinnable grade, for example those sold by Invista under the reference RT20 or by Dupont de Nemours. The first polymer (A) and the second polymer (B) can be found from Dupont de Nemours in the range Elvaloy or Arkema in the range of Lotader and Lotryl.

Table 1 below gives the weight ratios of the various starting components with respect to the total mass of the compositions were extruded and then pelletized.

Table 1

The MFI values ​​reported in Table 1 are measured for the compositions (tests 1-9) and the only polyester (PET) for the test 10 (preferably Flox Melt index or melt flow index is measured according to either the one of the ISO 1133 standards - February 1, 2012 and ASTM D 1238 - August 2013, to 270 ° C under a weight of 2.16 kg).

Tests acrylates mmol / g Pressure die T5 (° C) measured at

(Pol. A + B) extrusion (bar) the inlet of the fifth zone

1 0,17 5,7 260

2 0,16 7,1 262

3 0,15 8,8 263

4 0,41 7 260

5 0,40 9,9 262

6 0,39 11,6 265

7 9 260

8 0,64 10,3 261

9 0,62 14 268

0 10 5.7 - Table 2

Table 2 above shows the theoretical molar amounts of these acrylates functions with respect to the mass of the first and second polymers (A) and (B), acrylates functions here being supported in these examples by the first and second polymers (A ) and B). It is noted that the greater the amount of second copolymer B increases, the pressure in the extrusion die increases compared with the setpoint of 5.7 bar and the temperature T5 in the extrusion die increases. A non-exhaustive explanation of this phenomenon is that the glycidyl functions of the second copolymer B react with carboxylic acid functional groups in the polyester chain ends which would increase the viscosity of the extruded material, and thus the friction and shear in the latter and, correspondingly, the pressure and temperature at the die. This grafting reaction is illustrated in Figure 4.

II- spinning compositions pelletized to I

Tests 1 to 4 in Table 3 below match

test compositions 1-4 defined in Table 1. These compositions were extruded and spun using a single-screw extruder comprising an extrusion die having a plurality of spinning orifices and a set of filters. Means for drawing and spinning are arranged at the outlet of the extrusion die, and in particular comprises a nozzle sending an air jet to entangle the filaments. The son thus formed are multifilament son comprising 48 filaments. The filaments are cooled using a cold air stream. Outputting steps of spinning and drawing, the son are sized, in particular with a sizing agent (such as that sold under the reference Fasavin KB 88) up to 10% by weight based on the total weight of said wire .

Table 3

Table 3 lists the titles and tenacity that were measured on different son obtained by stretching techniques implemented.

Son obtained structure was also characterized by analyzing filament cuts the scanning electron microscope. nodule formation is thus observed first copolymer comprising

A disposed in a pouch of which the "shell" is formed of the second copolymer B, the second copolymer B thus acting as coupling agent with the polyester matrix.

Step III saponification and acidification step

A yarn comprising 48 filaments 150 deniers according to Test 4 defined in Table 3 DTY is knit (jersey weave). The basis weight of the knitted fabric is 31 g / m 2 . Samples of 6cm * 6cm were prepared and immersed for 45 minutes in a bath comprising 5g / l of sodium hydroxide at 85-90 ° C. A pH-metric assay was used to measure a caustic soda consumption of 50 +/- 10 meq / Kg fabric (by measuring the concentration of sodium hydroxide in the bath after the saponification step). The mass loss of knitting after saponification is about 1.8%. The amount in meq of acrylate functions and thus is saponifiable 168.5 mmol per kg of tested knitting. Thus, the measured soda consumption leads to the conclusion that approximately 30% of acrylates functions were saponified in the form of carboxylate functions.

Knits saponified then undergo an acidification step in which the samples are immersed in a bath of sulfuric acid solution 0.02 mol / L (0.04 mol / L = [H + ]) for 45 minutes, the bath being at room temperature. A pH-metric assay was used to measure an average acid consumption of 15 +/- 5 mmol H + / kg of knitting. This acid consumption is about 30% soda 50meq consumed in the saponification step per kg of knitting.

IV Measurement of absorption of an acid gas

These levels are measured according to ISO 17299-3: 2014 dated March 2014 entitled "Textiles - Determination of odor neutralizing properties - Part 3: Method by gas chromatography." Computing the rate of reduction mentioned in point 8 of said standard and corresponding to the difference of the average surface of the spectrum FID (hydrogen flame ionization detection) of the test gas without the textile element (Sb) minus the mean surface of the FID peak gas test with the textile element (Sm), this difference being attached to the surface Sb and then multiplied by 100. Thus, negative values ​​or zero indicates that there was no reduction in the target gas. The target gas used in the measurements reported hereinafter is acetic acid.

Note that ISO 17299-3: 2014 dated March 2014 referred to above provides for a wash before performing the absorption measurements of the target gas.

Knitted fabrics described above with reference to section III and only saponified are acetic acid absorption values ​​of 73% +/- 4%.

For comparison, the absorbance value of a standard knitting comprising exclusively of the polyester is less than 40%.

Knitted fabrics described above with reference to paragraph III, having undergone saponification step, and an acidification step, have absorption values ​​in acetic acid of 88% +/- 2%. The acidification step therefore improves the absorption properties as acetic acid.

The inventors have found in "sniff internal tests" that the performance of the synthetic textile article on the bad odors are perceived olfactory user from a gas absorption value of at least 50%, and the latter still increasing very significantly from 80%.

In acid gas absorption mechanisms, in this example acetic acid, are linked to acid-base reactions with carboxylic and carboxylate functions supported by the filaments. In particular, the reaction between a carboxylate and acetic acid generates a metal carboxylate (CH 3 COONa) nonvolatile which would explain the reduction of perceived odors. This would provide a deodorizing gas by salt formation.

Given the significant performance achieved in terms of reducing the perceived odor, it is also envisaged that polar interactions and hydrogen bonds between the carboxylic and acetic acid are held to explain this important phenomenon absorption in acetic acid . Re-initialization of textile articles can be achieved by rinsing with running water (e.g., in a domestic washing) or drying the textile article which moves the acid-base balance and evaporate the acid gas. The son of the invention and implemented in knitted samples tested and are fully-spinnable in the extrudable composition of the invention. Nevertheless, in the context of the present invention, only the surface of the wire comes into contact with the odoriferous molecules so that for reasons of economy, it may be envisaged to have the polyester-based functional matrix comprising polymers A and B only on the surface of son by performing son the heart-coat type, the coat comprising the functional matrix absorbing gas. In this case, the extrudable-spinnable composition according to the invention is coextruded with another polymeric composition so as to form a first polymeric structure consisting of said matrix (thus forming the coat for example) parallel to a second polymeric structure consisting of the second polymeric composition co-extruded (e.g. constituted more than 95% by weight of polyester). economy, it is conceivable to dispose the matrix functional polyester base comprising polymers A and B only on the surface of son son by making the heart-coat type, the coat comprising the functional matrix absorbing gas. In this case, the extrudable-spinnable composition according to the invention is coextruded with another polymeric composition so as to form a first polymeric structure consisting of said matrix (thus forming the coat for example) parallel to a second polymeric structure consisting of the second polymeric composition co-extruded (e.g. constituted more than 95% by weight of polyester). economy, it is conceivable to dispose the matrix functional polyester base comprising polymers A and B only on the surface of son son by making the heart-coat type, the coat comprising the functional matrix absorbing gas. In this case, the extrudable-spinnable composition according to the invention is coextruded with another polymeric composition so as to form a first polymeric structure consisting of said matrix (thus forming the coat for example) parallel to a second polymeric structure consisting of the second polymeric composition co-extruded (e.g. constituted more than 95% by weight of polyester). it may be envisaged to have the functional matrix polyester base comprising polymers A and B only on the surface of son son by making the heart-coat type, the coat comprising the functional matrix absorbing gas. In this case, the extrudable-spinnable composition according to the invention is coextruded with another polymeric composition so as to form a first polymeric structure consisting of said matrix (thus forming the coat for example) parallel to a second polymeric structure consisting of the second polymeric composition co-extruded (e.g. constituted more than 95% by weight of polyester). it may be envisaged to have the functional matrix polyester base comprising polymers A and B only on the surface of son son by making the heart-coat type, the coat comprising the functional matrix absorbing gas. In this case, the extrudable-spinnable composition according to the invention is coextruded with another polymeric composition so as to form a first polymeric structure consisting of said matrix (thus forming the coat for example) parallel to a second polymeric structure consisting of the second polymeric composition co-extruded (e.g. constituted more than 95% by weight of polyester).

CLAIMS

1. A filament or fiber absorbing odorants, especially (s) acid gas (s) and / or base (s), having an outer surface defined at least a portion of said surface comprises carboxylic groups -COOH and / or carboxylate groups -COO " complexed with metal salts, characterized (e) in that said portion consists of a matrix resulting from the reaction of a mixture comprising a polyester and a first copolymer of at least one olefin and (meth) acrylate and / or (meth) acrylic acid (a) and a second (co) polymer comprising oxirane groups -C2H3O (B), at least part of functions of (meth) acrylates the copolymer (A) having been converted into the corresponding carboxylate functions and / or corresponding carboxylic acids.

2. A filament or fiber according to Claim 1, characterized (e) in that the first copolymer of at least one olefin and (meth) acrylate and / or (meth) acrylic acid (A), and optionally said second (co) polymer (B) is (are each) an elastomer.

3. A filament or fiber according to either of Claims 1 and 2, characterized (e) in that the second polymer comprising oxirane groups (B) is a terpolymer of at least one olefin, (meth) acrylate or (meth) acrylic acid, and a monomer unit having an oxirane group, in particular a terpolymer of ethylene, (meth) acrylate or (meth) acrylic acid, and (meth) glycidyl acrylate.

4. A filament or fiber according to any one of claims 1 to 3, characterized in that the metal salts are salts of one or more Met (al) (in) chosen (s) from the group consisting of the following metals : potassium (K), sodium (Na), calcium (Ca), magnesium (Mg), aluminum (Al), silver (Ag), or their mixture.

5. Filament or fiber selon l'une des quelconque revendications 1 to 4, unfrankierte (s) en ce qu'il / elle comprend des premiere and second adjacent polymériques not mélangées, the premiere structure polymérique étant ladite matrix.

6. A filament or fiber according to any one of claims 1 to 5, characterized (e) in that the second polymer structure comprises at least one polymer selected from the list comprising: polyamide 6, polyamide 6,6, polyamide 12, polyamide 11, polyamide 4-6, polyester, polypropylene, and polyethylene or mixtures thereof.

7. A filament or fiber according to any one of claims 1 to 6, characterized in that said filament or said fiber has a heterogeneous cross-section of the heart-coat type, said coat being formed of said matrix.

8. A filament or fiber according to any one of claims 1 to 7, characterized in that the matrix comprises more than 50% by weight (g), relative to its total weight (g) of polyester, preferably more than 60% by weight, more preferably more than 70% by weight, particularly more than 75% by weight, relative to its total weight, of polyester.

9. A filament or fiber according to any one of claims 1 to 8, characterized (e) in that the weight ratio of the first copolymer (A) on the second (co) polymer (B) in said matrix is ​​between 99 / 1 to 85/15.

10. A filament or fiber according to any one of claims 1 to 9, characterized (e) in that the sum of the mass of the first copolymer (A) and the mass of the second polymer (B) with respect to the total mass of the matrix is ​​less than or equal to 20%.

11. extrudable-spinnable composition for the manufacture of at least a portion of the determined outer surface of a filament or fiber according to any one of claims 1 to 10, characterized in that said composition is derived from reacting the mixture comprising a polyester, a first copolymer of olefin and (meth) acrylate and / or (meth) acrylic acid (a) and a second (co) polymer comprising oxirane groups -C2H3O (B), the mass of the polyester relative to the total weight of said mixture being greater than or equal to 50%, and in that the polyester is selected from: polyethylene terephthalate, polytetra methylene terephthalate, polycyclohexane-dimethylene or dicarboxylate polyethylene naphthalene 2,6, or from homopolymers, copolymers, terpolymers,and mixtures of monomer units selected from the list consisting of: ethylene terephthalate, propylènetéréphtalate, butylene terephthalate, and 1,4-cyclohexylene-dimethylènetéréphtalate.

12. Composition according to Claim 11, characterized in that it has a melt index, measured in particular according to ASTM D1238-August 2013-270 ° C under a weight of 2.16 Kg, greater than or equal to 10 cm 3 /10 min.

13. Use of the extrudable-spinnable composition according to either of Claims 11 and 12 for the manufacture of at least a portion of the determined outer surface of a filament or fiber as claimed in any one of claims 1 to 10.

14. A method of manufacturing a filament or fiber according to any one of claims 1 to 10, characterized in that it comprises the following steps:

i) a step of extrusion-spinning a composition as claimed in Claim

11, or

a step of co-extrusion spinning of a composition according to claim 11 for forming a first polymeric structure forming a matrix and at least one polymer composition to form at least a second polymeric structure,

for obtaining a fiber or filament;

ii) optionally at least one step of stretching said filament or

said obtained fiber (e) in step (i);

iii) optionally a shaping step of said filament or said fiber for the manufacture of a textile article;

iv) a step of processing by hydrolysis of (meth) acrylates into carboxylate groups (-COO-) by immersing said fiber or said filament or said textile material in a basic bath.

15. The manufacturing method according to claim 14, characterized in that it comprises an acidification step vi) taking place after step iv) by immersing said fiber or said filament or said textile article in an acid bath.

16. A method of manufacture according to either of Claims 14 and 15, characterized in that there is applied at least one metal salt to said filament or said fiber or said textile article is in step iv), said basic bath then comprising at least one metal salt, or in an additional step vii) complexation, particularly by applying a solution of at least one metal salt to said filament or said fiber or said textile article.

17. multifilament yarn characterized in that it comprises a plurality of filaments according to any of claims 1 to 10.

18. A textile article characterized in that it comprises at least 5% by weight based on the total weight of the filament and / or fiber according to any one of claims 1 to 10.

19. Sports absorbent article (s) acid gas (s) and / or base (s) characterized in that it comprises a textile article according to claim 18, said textile article is in particular chosen from: a backpack; a sports bag; an article clothing, such as a vest, pants, shorts, underwear, a glove, a sock, a legging; a shoe ; a component of a shoe, such as insole, an inner lining or rod.