The present invention relates to a cloth tape being
usable as a constituent member of a fiber product and having
flame retardancy, and a fiber product obtained using the cloth
tape.
Background Art
[0002]
Conventionally, a cloth tape usable as a constituent
member of a fiber product has been proposed in, for example,
PTL 1.
[0003]
Meanwhile, in the fields of protective clothing,
fire-fighting fireproof clothing, fire fighting clothing,
rescue clothing, a flame-retardant workwear, a police uniform,
Self~Defense Forces official clothing, military clothing, and
the like, flame retardancy is demanded.
Citation List
Patent Literature
1
~---J
[0004]
PTL 1: JP-A-2002-249959
Summary of Invention
Technical Problem
[0005]
The present invention has been made in view of the above
background, and an object of the invention is to provide a cloth
tape being usable as a constituent member of a fiber product
and having flame retardancy and a fiber product obtained using
the cloth tape.
Solution to Problem
[0006]
The present inventors have conducted extensive and
intensive studies with a view toward achieving the
above-mentioned object. As a result, it has been found that,
by using a flame-retardant fiber for obtaining a cloth tape,
a cloth tape having flame retardancy can be obtained, and
extensive and intensive studies have been further made, and
thus the present invention has been completed.
[0007]
According to the invention, there is provided "a cloth
tape comprising an organic fiber, characterized in that the
cloth tape has an afterflame time of 2.0 seconds or less, as
2
measured in the flammability prescribed in JIS Ll091-1999 A-4
method (12-second heating method)."
[0008]
In the invention, it is preferred that the cloth tape
has an afterglow time of 3. 0 seconds or less and a carbonized
length of 10 em or less, as measured in the flammability
prescribed in JIS L1091-1999 A-4 method. Further, it is
preferred that the width of the cloth tape is in the range of
from 1 to 30 em. It is preferred that the cloth tape is
constituted by knitted fabric. It is preferred that the cloth
tape contains a wholly aromatic polyamide fiber. It is
preferred that the cloth tape contains a meta-type wholly
aromatic polyamide fiber in an amount of 30% by weight or more,
based on the weight of the cloth tape. It is preferred that
the cloth tape contains a meta-type l•lholly aromatic polyamide
fiber in an amount of 50 to 99% by weight, based on the weight
of the cloth tape. It is preferred that the cloth tape contains
a para -type 1-1holly aromatic polyamide fiber in an amount of
2 to 20% by Height, based on the weight of the cloth tape. It
is preferred that the cloth tape has been subjected to dyeing
processing.
[0009]
In the cloth tape of the invention, it is preferred that
the cloth tape has a bent portion. In this case, it is preferred
that the traveling direction of the bent portion is consistent
3
with the longitudinal direction or 1·1idth direction of the cloth
tape. Further, it is preferred that the width of the bent
portion is in the range of from 0. 3 to 20 em. It is preferred
that the bent portion has a stretch ratio of 10% or more. It
is preferred that the bent portion. has a bending rate defined
by the formula below of 1.1 or more:
Bending rate [B + (A x 2 x (the number of bending))] /B
A: the thickness of the bent portion (em),
B: the width of the bent portion (em).
In the cloth tape of the invention, it is preferred that
the cloth tape has a mesh portion. In this case, it is preferred
that the mesh portion has an opening ratio of 20% or more.
[0010)
Further, it is preferred that the mesh portion has a width
of 1 to 5 em and continues in the longitudinal direction of
the cloth tape. It is preferred that the cloth tape has
non-mesh portions having an opening ratio of 10% or less on
both sides of the mesh portion which continues in the
longitudinal direction. It is preferred that the cloth tape
has a fabric covering at least part of the mesh portion. It
is preferred that the fabric is capable of being opened and
closed.
4
H
[0011]
According to the invention, there is provided a fiber
product \·lhich comprises the above-mentioned cloth tape, and
which is any one fiber product selected from the group
consisting of protective clothing, fire-fighting fireproof
clothing, fire fighting clothing, rescue clothing, a \·lOrkwear,
a police uniform, Self-Defense Forces official clothing, and
military clothing.
Advantageous Effects of Invention
[0012]
By the present invention, there can be obtained a cloth
tape being usable as a constituent member of a fiber product
and having flame retardancy and a fiber product.
Brief Description of Drawings
[0013]
[Fig. 1] An example of a perspective view of the cloth tape
of the present invention. The cloth tape continues in the
longitudinal direction (L direction).
[Fig. 2] An example of a knitted fabric structure diagram which
can be used in producing the cloth tape of the invention.
[Fig. 3] An example of a perspective view of the cloth tape
of the invention. The cloth tape continues in the longitudinal
direction.
5
I,,I
Description of Embodiments
[0014)
Hereinbelow, an embodiment of the present invention will
be described in detail. In the invention, it is necessary that
the cloth tape have an afterflame time of 2. 0 seconds or less
(preferably 0.001 to 1.0 second), as measured in the
flammability prescribed in JIS Ll091-1999 A-4 method
(12-second heating method). When the afterflame time is more
than 2.0 seconds, satisfactory flame retardancy cannot be
secured, leading to a danger that the cloth tape catches fire
~o~hen exposed to a flame or the like.
[ 0015)
Particularly, it is preferred that the cloth tape has
an afterglow time of 3. 0 seconds or less and a carbonized length
of 10 em or less, as measured in the flammability prescribed
in JIS Ll091-1999 A-4 method (12-second heating method).
[0016)
For obtaining such flame retardancy, it is preferred that
a flame-retardant material is used as at least part of a main
body fabric for the cloth tape. The cloth tape may be subjected
to flame-retardancy processing.
[0017)
Examples of flame-retardant materials include meta-type
wholly aromatic polyamide fibers, para-type ~o~holly aromatic
6
•_J
polyamide fibers, flame-retardant rayon fibers, modacrylic
fibers, flame-retardant acrylic fibers, and flame-retardant
vinylon fibers, and there is no particular limitation. When
subjected to flame-retardancy processing, the material is not
particularly limited.
[0018]
It is more preferred that the cloth tape contains at least
a Hholly aromatic polyamide fiber. Further, it is more
preferred that a meta-type 1vholly aromatic polyamide fiber is
contained in the cloth tape in an amount of 30% by 1veight or
more (more preferably 50 to 99% by weight), based on the v1eight
of the cloth tape. When the weight percentage of the meta-type
wholly aromatic polyamide fiber is less than 30% by weight,
based on the Height of the cloth tape, there is a possibility
that satisfactory flame retardancy cannot be obtained and
carbonization is caused when exposed to a flame so that the
cloth tape becomes brittle.
[0019]
Further, it is preferred that the cloth tape contains
a para-type 1·1holly aromatic polyamide fiber in an amount of
2 to 20% by weight, based on the \·Ieight of the cloth tape. When
the Height percentage of the para-type 1·1holly aromatic
polyamide fiber is less than 2% by 1veight, based on the weight
of the cloth tape, there is a possibility that the cloth tape
suffers marked shrinkage when exposed to a flame. Conversely,
7
!!
when the \·Ieight percentage is more than 20% by weight, there
is a possibility that the cloth tape is hardened to cause the
wearing comfortability to become poor.
[0020]
It is preferred that the cloth tape is constituted by
only a meta-type 1·1holly aromatic polyamide fiber and/or a
para-type wholly aromatic polyamide fiber. Particularly, it
is preferred that the cloth tape is formed from only a spun
yarn obtained by blending a meta-type 1·1holly aromatic polyamide
fiber and a para-type wholly aromatic polyamide fiber.
[0021]
The meta-type wholly aromatic polyamide fiber is a fiber
formed from a polymer in 1vhich 85 mol% or more of the repeating
units are m-phenyleneisophthalamide. The meta-type wholly
aromatic polyamide may be a copolymer containing a third
component in the range of less than 15 mol%.
[0022]
The meta-type wholly aromatic polyamide can be produced
by a conventionally knmm interfacial polymerization method,
and there is preferably used a polymer having, in terms of the
degree of polymerization, an intrinsic viscosity (I. V.) in the
range of from 1.3 to 1.9 dl/g, as measured in the form of an
N-methyl-2-pyrrolidone solution at a concentration of 0.5
g/100 ml.
[0023]
8
~--l
The meta-type wholly aromatic polyamide may contain an
alkylbenzenesulfonic acid onium salt. Preferred examples of
alkylbenzenesulfonic acid onium salts include compounds, such
as tetrabutylphosphonium hexylbenzenesulfonate,
tributylbenzylphosphonium hexylbenzenesulfonate,
tetraphenylphosphonium dodecylbenzenesulfonate,
tributyltetradecylphosphonium dodecylbenzenesulfonate,
tetrabutylphosphonium dodecylbenzenesulfonate, and
tributylbenzylammonium dodecylbenzenesulfonate. Of these,
tetrabutylphosphonium dodecylbenzenesulfonate or
tributylbenzylammonium dodecylbenzenesulfonate is especially
preferred because they are easily available and have excellent
thermal stability as \ve 11 as high solubility in
N-methyl-2-pyrrolidone.
(0024)
For obtaining a satisfactory improvement effect for
dyeing properties, the amount of the alkylbenzenesulfonic acid
onium salt contained is preferably 2.5 mol% or more (more
preferably 3.0 to 7.0 mol%), based on the mole of
poly-m-phenyleneisophthalamide.
(0025)
With respect to the method for mixing
poly-m-phenyleneisophthalamide with an alkylbenzenesulfonic
acid onium salt, there is used a method in which
poly-m-phenyleneisophthalamide is mixed and dissolved in a
9
solvent and then an alkylbenzenesulfonic acid onium salt is
dissolved in the solvent, or the like, and any method may be
used. The thus obtained dope is formed into a fiber by a
conventionally known method.
[0026]
For the purpose of improving the dyeing properties and
the resistance to discoloration and color fading and the like,
in the polymer used in the meta-type wholly aromatic polyamide
fiber, which has an aromatic polyamide skeleton having
repeating structural units represented by the formula ( 1) bel01v,
an aromatic diamine component different from the main
constituent units of the repeating structure, or an aromatic
dicarboxylic acid halide component can be copolymerized as a
third component with the aromatic polyamide skeleton so that
the amount of the third component becomes 1 to 10 mol%, based
on the total mole of the repeating structural units of the
aromatic polyamide.
[0027]
-(NH-Ar1-NH-CO-Ar1-CO)- ... Formula (1)
wherein Ar1 is a divalent aromatic group having a bonding
group at a position other than the meta position or the parallel
axis direction.
[0028]
Further, another component can be copolymerized as a
third component. Specific examples of aromatic diamines
10
represented by the formulae ( 2) and ( 3) include
p-phenylenediamine, chlorophenylenediamine,
methylphenylenediamine, acetylphenylenediamine,
aminoanisidine, benzidine, bis(aminophenyl) ether,
bis(aminophenyl) sulfone, diaminobenzanilide, and
diaminoazobenzene. Specific examples of aromatic
dicarboxylic acid dichlorides represented by the formulae ( 4)
and ( 5) include terephthaloyl chloride,
1,4-naphthalenedicarbonyl chloride,
2,6-naphthalenedicarbonyl chloride, 4,4'-biphenyldicarbonyl
chloride, 5-chloroisophthaloyl chloride,
5-methoxyisophthaloyl chloride, and
bis(chlorocarbonylphenyl) ether.
[0029]
H2N-Ar2-NH2 •.. Formula (2)
H2N-Ar2-Y-Ar2-NH2 •.. Formula (3)
XOC-Ar3-COX ... Formula (4)
XOC-Ar3-Y-Ar3-COX ... Formula (5)
wherein Ar2 represents a divalent aromatic group
different from Arl, Ar3 represents a divalent aromatic group
different from Arl, Y represents at least one atom or functional
group selected from the group consisting of an oxygen atom,
a sulfur atom, and an alkylene group, and X represents a halogen
atom.
[0030]
11
The crystallinity of the meta-type \'/holly aromatic
polyamide fiber is preferably 5 to 35% because the absorption
for a dye is excellent such that an intended color can be easily
achieved even when using the dye in a reduced amount or even
under poor dyeing conditions. Further, the crystallinity is
more preferably 15 to 25% because localization of a dye in the
surface is unlikely to occur and a high resistance to
discoloration and color fading is obtained and further
dimensional stability required for the practical use can be
secured.
[0031]
The residual solvent content of the meta-type \vholly
aromatic polyamide fiber is preferably 0. 1% by weight or less
because excellent flame retardancy of the meta-type wholly
aromatic polyamide fiber is not sacrificed and localization
of a dye in the surface is unlikely to occur and a high resistance
to discoloration and color fading is obtained.
[0032]
The meta-type wholly aromatic polyamide fiber can be
produced by the method mentioned below. By the
below-mentioned method, the crystallinity and residual
solvent content in the above-mentioned respective ranges can
be achieved.
[0033]
With respect to the polymerization method for the
12
meta-type 1vholly aromatic polyamide polymer, there is no
particular limitation, and, for example, the solution
polymerization method or interfacial polymerization method
described in JP-B-35-14399, U.S. Patent No. 3,360,595,
JP-B-47-10863, or the like may be used.
[0034]
The spinning solution is not particularly limited, but
an amide-solvent solution containing an aromatic copolyamide
polymer obtained by the above-mentioned solution
polymerization, interfacial polymerization, or the like may
be used, or a solution obtained by isolating the polymer from
the above-mentioned polymerization solution and dissolving
the polymer in an amide solvent may be used.
[ 0035]
As examples of the amide solvents used, there can be
mentioned N,N-dimethylformamide, N,N-dimethylacetamide,
N-methyl-2-pyrrolidone (NMP), and dimethyl sulfoxide, but
N,N-dimethylacetamide is especially preferred.
[0036]
When the copolymerized aromatic polyamide polymer
solution obtained as mentioned above further contains an alkali
metal salt or an alkaline earth metal salt, the solution is
stabilized and can be advantageously used in a higher
concentration at low temperatures. The amount of the alkali
metal salt and alkaline earth metal salt is preferably 1% by
13
\·Ieight or less (more preferably 0. 1% by \·Ieight or less) , based
on the Height of the polymer solution.
[0037]
In the spinning and coagulation steps, the
above-obtained spinning solution (meta-type Hholly aromatic
polyamide polymer solution) is discharged into a coagulation
liquid so as to suffer coagulation.
[0038]
With respect to the spinning apparatus, there is no
particular limitation, and a conventionally knm·m 1·1et spinning
apparatus can be used. Further, 1·1i th respect to the number
of spinning pores of a spinning nozzle, the arrangement of the
pores, the form of the pore, and the like, there is no particular
limitation as long as \-let spinning can be stably made, and,
for example, a multihole spinning nozzle for rayon yarn having
1,000 to 30,000 pores and having a spinning pore diameter of
0.05 to 0.2 mm or the like may be used.
[0039]
Further, the temperature of the spinning solution
(meta-type \•/holly aromatic polyamide polymer solution) being
discharged from a spinning nozzle is preferably in the range
of from 20 to 90°C.
[0040]
As a coagulation bath used for obtaining a fiber, an amide
solvent containing substantially no inorganic salt
14
(preferably an aqueous solution having an NMP concentration
of 45 to 60% by mass) at a bath solution temperature in the
range of from 10 to 50°C is used. When the amide solvent
(preferably NMP) concentration is less than 45% by mass, there
is a possibility that a structure having a thick skin is
disadvantageously formed, so that the washing efficiency in
the washing step is lowered, making it difficult to reduce the
residual sol vent content of the fiber. On the other hand, 1·1hen
the amide solvent (preferably NMP) concentration is more than
60% by mass, there is a possibility that uniform coagulation
throughout the inside of the fiber cannot be achieved, making
it difficult to reduce the residual solvent content of the fiber.
The time for immersing the fiber in the coagulation bath is
preferably in the range of from 0.1 to 30 seconds.
[0041)
Subsequently, in a plasticized draw bath containing an
aqueous solution having an amide solvent (preferably NMP)
concentration of 45 to 60% by mass at a bath solution
temperature in the range of from 10 to 50°C, the fiber is
subjected to drawing at a draw ratio of 3 to 4 times. After
dravling, the fiber is 1-1ell Hashed through an aqueous solution
having an NMP concentration of 20 to 40% by mass at 10 to 30°C
and further through a 1-1arm water bath at 50 to 70°C.
[0042)
The fiber after being Hashed is subjected to dry heat
15
treatment at a temperature of 270 to 290°C, obtaining a
meta -type 1vholly aromatic polyamide fiber satisfying the
crystallinity and residual solvent content in the
above-mentioned respective ranges.
[0043]
In the meta-type wholly aromatic polyamide fiber, the
fiber may be either a continuous fiber (multifilament) or a
short fiber. Particularly, in view of blending with another
fiber, a short fiber having a fiber length of 25 to 200 mm is
preferred. Further, the single fiber fineness is preferably
in the range of from 1 to 5 dtex.
[0044]
Examples of commercially available products of meta-type
1vholly aromatic polyamide fibers include Conex (trade name),
Conex neo (trade name), and Nomex (trade name).
[0045]
The para-type wholly aromatic polyamide fiber is
representatively Technora (trade name), Kevlar (trade name),
and Twaron (trade name), and is a fiber formed from a polyamide
having an aromatic ring in the principal chain thereof, and
may be poly-p-phenyleneterephthalamide (PPTA) or
copoly-paraphenylene-3,4'oxydiphenyleneterephthalamide
(PPODPA) which is of a copolymer type.
[0046]
In the cloth tape of the invention, the first embodiment
16
has a bent portion. In the invention, the term "bent portion"
means that, as viewed on the transverse section of the cloth
tape shmm in Fig. 1, rib portions on the top surface and rib
portions on the bottom surface are alternately formed (that
is, a corrugated surface is formed). By virtue of having such
a bent portion, the cloth tape has stretchability.
[0047]
In the cloth tape of the invention, the width Wl of the
cloth tape is preferably in the range of from 1 to 30 em (more
preferably 2 to 10 em) . When the 1-1idth Wl is smaller than 1
ern, there is a possibility that satisfactory stretchability
cannot be obtained. Conversely, 1-1hen the width Wl is larger
than 30 em, there is a possibility that the handling properties
of the cloth tape become poor.
[0048]
It is preferred that the traveling direction of the bent
portion (traveling direction of the 1-1ave) is consistent 1-1ith
the longitudinal direction or 1vidth direction of the cloth tape.
In Fig. 1, the traveling direction of the bent portion is
consistent with the 1·1idth direction (W direction) of the cloth
tape.
[0049]
Further, the W2 1-1idth of the bent portion is preferably
in the range of from 0. 3 to 20 em (more preferably 1 to 8 em) .
When the 1-1idth W2 is smaller than 0. 3 em, there is a possibility
17
II ;;
that satisfactory stretchability cannot be obtained.
Conversely, when the width W2 is larger than 20 em, there is
a possibility that the handling properties of the cloth tape
become poor.
[0050]
The thickness of the bent portion is preferably in the
range of from 1 to 10 mm.
[0051]
For obtaining excellent stretchability, the bent portion
preferably has a bending rate defined by the formula bel01-1 of
1.1 or more (more preferably 1.3 to 10).
[0052]
(Bending rate) [B + (Ax 2 x (the number of bending))] /B
A: the thickness of the bent portion (em),
B: the width of the bent portion (em)
Further, the bent portion preferably has a stretch ratio
of 10% or more (more preferably 25% or more, especially
preferably 50 to 300%). When the stretch ratio is smaller than
10%, there is a possibility that the wearing comfortability
becomes poor.
[0053]
The cloth structure of the cloth tape is not limited,
but the cloth tape is preferably constituted by woven fabric
18
and/or knitted fabric. Particularly, the cloth tape
constituted by knitted fabric is preferred.
denbign knitted fabric is preferred.
[0054)
Especially,
With respect to the method for producing the cloth tape,
the cloth tape can be produced by, for example, the method
described in JP-A-2010-285721 at paragraph 0029 or the like.
Specifically, for example, knitting is preferably performed
in which, using a needle on the surface side of double raschel
knitting machines, denbign stitched portions (surface-side
main knitted portions) having a predetermined 1·lidth are knit ted
in the weft direction at predetermined intervals, 1·1hile, using
a needle on the back side, denbign stitched portions (back-side
main knitted portions) having a predetermined 1vidth are
similarly knitted in the weft direction at predetermined
intervals, and further the phase of the back-side main knitted
portions arranged in parallel shifts in the weft direction 1vi th
respect to that of the surface-side main knitted portions so
that each back-side main knitted portion is positioned in the
center between the surface-side main knitted portions. In
this instance, it is preferred that the side edge of the
surface-side main knitted portion and the side edge of the
adjacent back-side main knitted portion are connect-knitted
together in the warp direction by double chain stitch or double
denbign stitch (connect-knitted portion), knitting on both
19
sides of the knitted fabric respective selvedge portions with
the same knitted fabric structure as that of the
connect-knitted portion.
[0055]
It is more preferred that the tape is dyed. When the
tape is capable of being dyed, it becomes possible to perform
a procedure in which colorless fabric is prepared and dyed
according to the use or demand and then shipped. Further, 1·1hen
forming a fiber product using the cloth tape, the cloth tape
can be dyed with a color in accordance with the color of cloth
of the other part of the fiber product.
[ 0056]
Further, other various types of processing for adding
a flame retardant, a water absorber, a water repellent, a
thermal storage agent, an ultraviolet light screening agent,
an antistatic agent, an anti-fungus agent, a deodorant, a
mothproofing agent, a mosquito repellent, a phosphorescent
agent, a retroreflective agent, or the like may be applied.
[0057]
The cloth tape has the above-mentioned construction, and
therefore has not only flame retardancy but also
stretchability.
[0058]
A fiber product according to the first embodiment is a
fiber product which is obtained using the above-mentioned cloth
20
tape in a part thereof, and which is any one fiber product
selected from the group consisting of protective clothing,
fire-fighting fireproof clothing, fire fighting clothing,
rescue clothing, a flame-retardant work1vear, a police uniform,
Self-Defense Forces official clothing, and military clothing.
[0059]
The cloth tape is preferably disposed partially on a part
for a joint, such as shoulder, elbow, or knee, or the like.
In this case, the fiber constituting a part other than the cloth
tape is preferably a meta-type 1vholly aromatic polyamide fiber
and/or a para-type wholly aromatic polyamide fiber.
[0060]
The fiber product uses the above-described cloth tape,
and therefore has excellent characteristic feature such that
it has not only flame retardancy but also stretchability.
[0061]
In the cloth tape of the invention, the second embodiment
has a mesh portion. The mesh portion preferably has an opening
ratio defined by the formula below of 20% or more (more
preferably 30 to 60%). When the opening ratio is less than
20%, there is a possibility that satisfactory air permeability
cannot be obtained, so that the comfortability becomes poor.
Opening ratio (C/D) X 100 (%)
21
ll.
. . -'
wherein C is a total area of void portions surrounded
by a fiber portion obtained Hhen the fabric is projected, and
D is a total of the area of the void portions and the area of
the fiber portion.
[0062]
It is preferred that the mesh portion has a width of 1
to 5 em and continues in the longitudinal direction of the cloth
tape. When the v1idth is smaller than 1 em, there is a
possibility that the air permeability becomes poor.
Conversely, 1·1hen the width is larger than 5 em, there is a danger
that a flame passes through the mesh portion.
[0063]
Further, it is preferred that the cloth tape has non-mesh
portions (l011 air-permeability portions) on both sides of the
mesh portion 1·1hich continues in the longitudinal direction
because the structure of the cloth tape is stabilized. In this
case, the opening ratio of the non-mesh portion is preferably
10% or less. When the opening ratio of the non-mesh portion
is larger than 10%, there is a possibility that, in a fiber
product to 1-1hich the cloth tape is attached using a sewing yarn,
for example, the yarn moves out of the position to cause the
cloth tape to be unstable.
[0064]
It is preferred that the cloth tape has a double structure
such that it has a fabric (flap portion) covering the mesh
22
portion because a flame is unlikely to pass through the mesh
portion. In this case, the fabric covering the mesh portion
is preferably one of 1·1hich the above-mentioned opening ratio
is less than 20% (non-mesh) . The fabric is woven fabric,
knitted fabric or the like and is not particularly limited,
but is preferably warp knitted fabric, and the mesh portion
and the non-mesh portion of the cloth tape are more preferably
integrally formed.
[0065]
For obtaining excellent flame retardancy, as a main body
fabric for the cloth tape (fabric having a mesh portion) and
a fabric covering the mesh portion, the above-mentioned
flame-retardant material is used, or fabric may be subjected
to flame retardancy post-processing.
[ 0 0 66]
It is preferred that the cloth tape is constituted by
woven fabric and/or knitted fabric. The cloth tape may be one
1-1hich is constituted solely by woven fabric or knitted fabric,
and may be one which is obtained by connecting 1-10ven fabric
and knitted fabric together by se1·1ing using a sewing yarn. The
woven fabric is preferably plain woven fabric, twill woven
fabric, satin woven fabric, or the like, but is not particularly
limited. The knitted fabric is circular knitted fabric (l·left
knitted fabric), warp knitted fabric, or the like and is not
particularly limited, but is more preferably warp knitted
23
fabric because the structure of the cloth tape is stabilized.
The width of the cloth tape is preferably 1 to 30 em (more
preferably 2 to 10 em) .
[0067]
With respect to the method for producing the cloth tape,
as described in, for example, JP-A-2002-249959, the cloth tape
can be produced by means of double raschel knitting machines.
[ 0 0 68]
It is more preferred that the cloth tape is dyed. vlhen
the cloth tape is capable of being dyed, it becomes possible
to perform a procedure in which colorless fabric is prepared
and dyed according to the use or demand and then shipped.
Further, 1·1hen forming a fiber product using the cloth tape,
the cloth tape can be dyed \·lith a color in accordance 1-1i th the
color of cloth of the other part of the fiber product.
[0069]
Further, other various types of processing for adding
a flame retardant, a water absorber, a water repellent, a
thermal storage agent, an ultraviolet light screening agent,
an antistatic agent, an anti-fungus agent, a deodorant, a
mothproofing agent, a mosquito repellent, a phosphorescent
agent, a retroreflective agent, or the like may be applied.
[0070]
The fiber product of the invention is a fiber product
which is obtained using the above-mentioned cloth tape in a
24
!ff'¥i¥l
F--l
part thereof, and which is any one fiber product selected from
the group consisting of protective clothing, fire-fighting
fireproof clothing, fire fighting clothing, rescue clothing,
a flame-retardant workwear, a police uniform, Self-Defense
Forces official clothing, and military clothing.
[0071]
When the cloth tape has a fabric covering the opening
portion, it is preferred that the fabric is disposed on the
open air side. Further, it is preferred that the cloth tape
is not used in the whole of the fiber product but used only
in a part of the fiber product, such as a part for armpit, through
1vhich sweat is likely to come, or of which the body temperature
is unlikely to lower. In this case, the fiber constituting
a part other than the cloth tape is preferably a meta-type
1·1holly aromatic polyamide fiber and/or a para-type wholly
aromatic polyamide fiber.
[0072]
A fiber product according to the second embodiment is
obtained using the above-mentioned cloth, and therefore has
excellent characteristic feature such that it has both high
air permeability and flame retardancy.
Examples
[0073]
Hereinbelow, the present invention 1-1ill be described in
25
more detail with reference to the follmling Examples and
Comparative Examples, which should not be construed as limiting
the scope of the invention.
(1) Flammability
With both ends of a cloth tape was sewn woven fabric,
1vhich had been prepared using the same spun yarn as used for
knitting the cloth tape, using a se1ving yarn made of 100% of
a meta-type 1·1holly aromatic polyamide fiber so that the
resultant tape had a predetermined width, and measurement of
the flammability prescribed in JIS L1091-1999 A-4 method
(12-second heating method) Has performed.
(2) Stretch ratio
A plurality of cloth tapes were sewn and connected
together in the direction perpendicular to the longitudinal
direction of the tape using a sewing yarn made of 100% of a
meta-type wholly aromatic polyamide fiber so that the resultant
tape had a predetermined size, and a stretch ratio 1·1as measured
in accordance 1vith the method prescribed in JIS L1096 8.16 B
method.
(3) Bending rate
Bending rate = [B + (A x 2 x (the number of bending))] /B
A: the thickness of the bent portion (em)
26
~I ,,_
B: the width of the bent portion (em)
(4) Opening ratio
An opening ratio was calculated from the follm1ing
formula.
Opening ratio~ (C/D) x 100(%)
wherein C is a total area of void portions surrounded
by a fiber portion obtained when the fabric is projected, and
D is a total of the area of the void portions and the area of
the fiber portion.
[0074]
[Example 1]
Using only a spun yarn No. 40 (yarn count)/two folded
yarn \·lhich is made of staple fibers of a meta-type \·/holly
aromatic polyamide fiber (Conex (trade name) MA) and a
para-type wholly aromatic polyamide fiber (Twaron (trade name)
PA) (both staple fibers having a fiber length of 51 mm) and
Hhich is obtained by blending the fibers in a mass ratio of
MA/PA ~ 95/5, knitting of Harp knitted fabric was conducted
by means of double raschel machines with the knitted fabric
structure shoHn in Fig. 2. Then, the resultant fabric Has
scoured by a general method, and the meta -type \•/holly aromatic
polyamide fiber \vas dyed and then, the fabric Has fixed using
a pin \vhile extending it so that the \·lidth of the bent portion
became 1.3 times, and subjected to heat setting to obtain a
27
cloth tape having a bending rate of l. 45. The width was 4 em,
and the thickness of the bent portion Nas 3 mm. Further, as
seen in Fig. l, the traveling direction of the bent portion
was consistent with the width direction of the cloth tape.
[0075]
The obtained cloth tape had a stretch ratio of 121%, and
had flame retardancy such that the afterflame time was 0.1
second, the aftergl01~ time was 1. 2 seconds, and the carbonized
length was 6.0 em.
[0076]
Then, a fiber product (protective clothing) was produced
using the above-obtained cloth tape in a part for shoulder of
the fiber product and using in the other part 1voven fabric which
was prepared by a general method using a spun yarn No. 40 (yarn
count)/two folded yarn which is made of staple fibers of a
meta-type ~Vholly aromatic polyamide fiber (Conex (trade name))
MA and a para-type wholly aromatic polyamide fiber (Twaron
(trade name)) PA (both staple fibers having a fiber length of
51 mm) and ~Vhich is obtained by blending the fibers in a mass
ratio of MA/PA = 95/5. A test performer wore the fiber product,
and, as a result, it was found that the fiber product had
excellent stretchability so that the test performer felt very
comfortable.
[0077]
[Comparative Example 1]
28
Procedure was performed in substantially the same manner
as in Example 1 except that the spun yarn was changed to a spun
yarn No. 40 (yarn count)/two folded yarn made solely of a
polyester fiber.
[0078]
The obtained cloth tape had a bending rate of 1.58 and
a stretch ratio of 132%, but suffered complete combustion in
the flammability prescribed in JIS Ll091-1999 A-4 method
(12-second heating method) and thus had no flame retardancy.
Further, a fiber product (protective clothing) was produced
using the obtained cloth tape in a part for shoulder of the
fiber product and using in the other part woven fabric 1·1hich
was prepared by a general method using a spun yarn No. 40 (yarn
count) /two folded yarn 1•1hich is made of staple fibers of a
meta-type wholly aromatic polyamide fiber (Conex (trade name))
MA and a para-type 1vholly aromatic polyamide fiber (Twaron
(trade name)) PA (both staple fibers having a fiber length of
51 mm) and which is obtained by blending the fibers in a mass
ratio of MA/PA = 95/5.
[0079]
A test performer wore the fiber product, and, as a result,
it was found that the fiber product had excellent
stretchability.
[0080]
[Example 2]
29
H
Procedure \·las performed in substantially the same manner
as in Example l except that the cloth tape \·las extended so that
the Hidth of the bent portion became 2.6 times and subjected
to heat setting to obtain a cloth tape having a bending rate
of 1. 03.
[0081]
The obtained cloth tape had unsatisfactory
stretchability such that the stretch ratio \·las 23%, but, \•lith
respect to the flammability, the cloth tape had flame
retardancy such that the afterflame time vias 0. 2 second, the
afterglow time \vas 1.1 seconds, and the carbonized length \·las
5.3 em.
[0082]
Then, a fiber product (protective clothing) \·1as produced
using the above-obtained cloth tape in a part for shoulder of
the fiber product (protective clothing) and using in the other
part \'lOVen fabric \vhich \·las prepared by a general method using
a spun yarn No. 40 (yarn count) /two folded yarn which is made
of staple fibers of a meta-type \·1holly aromatic polyamide fiber
(Conex (trade name)) MA and a para-type wholly aromatic
polyamide fiber (Twaron (trade name)) PA (both staple fibers
having a fiber length of 51 mm) and which is obtained by blending
the fibers in a mass ratio of MA/PA = 95/5.
[0083]
A test performer wore the fiber product, and, as a result,
30
it was found that the stretchability at the part for shoulder
1·1as poor, as compared to that of the fiber product obtained
in Example 1.
[0084)
[Example 3)
Using a spun yarn No. 40 (yarn count)/two folded yarn
which is made of staple fibers of a meta-type 1·1holly aromatic
polyamide fiber (Conex (trade name) MA) and a para-type wholly
aromatic polyamide fiber (Twaron (trade name) PA) (both staple
fibers having a fiber length of 51 mm) and which is obtained
by blending the fibers in a mass ratio of MA/PA = 95/5, knitting
of warp knitted fabric was conducted by means of double raschel
machines to knit a cloth tape shmm in Fig. 3. In this instance,
a mesh portion (opening ratio: 35%), a non-mesh portion
(opening ratio: 7%), and a flap portion (opening ratio: 7%)
were integrally formed.
[0085)
Then, the resultant tape was scoured by a general method,
and subjected to dyeing processing to dye the meta-type 1·1holly
aromatic polyamide fiber, followed by heat setting.
[0086)
The obtained cloth tape had flame retardancy such that,
as measured in the flammability prescribed in JIS Ll091-1999
A-4 method (12-second heating method), the afterflame was 0. 7
second, the aftergl0\'1 1·1as 0. 9 second, and the carbonized length
31
was 4.8 em. Further, a fiber product (protective clothing)
was produced using the obtained cloth tape in a part for armpit
of the fiber product and using in the other part 1-10ven fabric
which 1·1as prepared by a general method using a spun yarn No.
40 (yarn count) /tlvo folded yarn 1·1hich is made of staple fibers
of a meta-type wholly aromatic polyamide fiber (Conex (trade
name) MA) and a para-type v1holly aromatic polyamide fiber
(T1-1aron (trade name) PA) (both staple fibers having a fiber
length of 51 mm) and lvhich is obtained by blending the fibers
in a mass ratio of MA/PA = 95/5.
[0087]
A test performer 1-1ore the fiber product, and, as a result,
it 1-1as found that the air permeability at the part for armpit
v1as excellent so that the test performer felt very comfortable.
[0088]
[Comparative Example 2]
Procedure \vas performed in substantially the same manner
as in Example 3 except that a spun yarn No. 40 (yarn count) /tv/0
folded yarn made solely of a polyester fiber 1-1as used.
[0089]
The obtained cloth tape suffered complete combustion in
the flammability prescribed in JIS Ll091-1999 A-4 method
(12-second heating method) and thus had no flame retardancy.
Further,· a fiber product (protective clothing) \vas produced
using the obtained cloth tape in a part for armpit of the fiber
32
1.·1 r=--
product and using in the other part woven fabric which was
prepared by a general method using a spun yarn No. 40 (yarn
count)/two folded yarn which is made of staple fibers of a
meta-type 1vholly aromatic polyamide fiber (Conex (trade name)
MA) and a para-type wholly aromatic polyamide fiber (Twaron
(trade name) PA) (both staple fibers having a fiber length of
51 mm) and which is obtained by blending the fibers in a mass
ratio of MA/PA ~ 95/5.
[0090]
A test performer wore the fiber product, and, as a result,
it 1vas found that the air permeability at the part for armpit
was excellent.
[0091]
[Example 4]
Procedure was performed in substantially the same manner
as in Example 3 except that the opening ratios were individually
changed as folloHs: mesh portion (opening ratio: 10%) , non-mesh
portion (opening ratio: 5%), and flap fabric (opening ratio:
5%) .
[0092]
The obtained cloth tape had flame retardancy such that,
as measured in the flammability prescribed in JIS L1091-1999
A-4 method ( 12-second heating method) , the after flame time was
0. 9 second, the afterglow time was 1. 1 seconds, and the
carbonized length 1vas 5. 3 em. Further, a fiber product
33
(protective clothing) was produced using the obtained cloth
tape in a part for armpit of the fiber product and using in
the other part woven fabric which was prepared by a general
method using a spun yarn No. 40 (yarn count) /t1·1o folded yarn
which is made of staple fibers of a meta-type 1-1holly aromatic
polyamide fiber (Conex (trade name) MA) and a para-type 1-1holly
aromatic polyamide fiber (T1·1aron (trade name) PA) (both staple
fibers having a fiber length of 51 mm) and 1·1hich is obtained
by blending the fibers in a mass ratio of MA/PA = 95/5.
[0093]
A test performer wore the fiber product, and, as .a result,
it 1-1as found that the air permeability at the part for armpit
was lower than that of the fiber product obtained in Example
3.
Industrial Applicability
[0094]
By the present invention, there are provided a cloth tape
having flame retardancy and a fiber product, and they are of
extremely great commercial significance.
Reference Signs List
[ 0 0 95]
1: Mesh portion
2: Flap portion

CLAIMS
[Claim 1]
A cloth tape comprising an organic fiber, characterized
in that the cloth tape has an afterflame time of 2.0 seconds
or less, as measured in the flammability prescribed in JIS
Ll091-1999 A-4 method (12-second heating method).
[Claim 2]
The cloth tape according to claim 1, >vhich has an
afterglow time of 3. 0 seconds or less and a carbonized length
of 10 em or less, as measured in the flammability prescribed
in JIS Ll091-1999 A-4 method.
[Claim 3]
The cloth tape according to claim 1 or 2, wherein the
>vidth of the cloth tape is in the range of from 1 to 30 em.
[Claim 4]
The cloth tape according to any one of claims 1 to 3,
wherein the cloth tape is constituted by knitted fabric.
[Claim 5]
The cloth tape according to any one of claims 1 to 4,
wherein the cloth tape contains a wholly aromatic polyamide
fiber.
[Claim 6]
The cloth tape according to any one of claims 1 to 5,
wherein the cloth tape contains a meta-type wholly aromatic
36
polyamide fiber in an amount of 30% by 1·1eight or more, based
on the weight of the cloth tape.
[Claim 7]
The cloth tape according to any one of claims 1 to 6,
wherein the cloth tape contains a meta-type \•/holly aromatic
polyamide fiber in an amount of 50 to 99% by weight, based on
the weight of the cloth tape.
[Claim 8]
The cloth tape according to any one of claims 1 to 7,
wherein the cloth tape contains a para-type 1vholly aromatic
polyamide fiber in an amount of 2 to 20% by weight, based on
the weight of the cloth tape.
[Claim 9]
The cloth tape according to any one of claims 1 to 8,
1vherein the cloth tape has been subjected to dyeing processing.
[Claim 10]
The cloth tape according to any one of claims 1 to 9,
wherein the cloth tape has a bent portion.
[Claim 11]
The cloth tape according to claim 10, wherein the
traveling direction of the bent portion is consistent with the
longitudinal direction or width direction of the cloth tape.
[Claim 12]
The cloth tape according to claim 10 or 11, wherein the
width of the bent portion is in the range of from 0.3 to 20
37
em.
[Claim 13)
The cloth tape according to any one of claims 10 to 12,
wherein the bent portion has a stretch ratio of 10% or more.
[Claim 14)
The cloth tape according to any one of claims 10 to 13,
wherein the bent portion has a bending rate defined by the
formula below of 1.1 or more:
Bending rate [B + (A x 2 x (the number of bending))] /B
A: the thickness of the bent portion (em),
B: the width of the bent portion (em).
[Claim 15)
The cloth tape according to any one of claims 1 to 9,
wherein the cloth tape has a mesh portion.
[Claim 16)
The cloth tape according to claim 15, wherein the mesh
portion has an opening ratio of 20% or more.
[Claim 17)
The cloth tape according to claim 15 or 16, wherein the
mesh portion has a width of 1 to 5 em and continues in the
longitudinal direction of the cloth tape.
[Claim 18)
The cloth tape according to any one of claims 15 to 17,
38
which has non-mesh portions having an opening ratio of 10% or
less on both sides of the mesh portion which continues in the
longitudinal direction.
[Claim 19]
The cloth tape according to any one of claims 15 to 18,
which has a fabric covering at least part of the mesh portion.
[Claim 20]
The cloth tape according to claim 19, wherein the fabric
is capable of being opened and closed.
[Claim 21]
A fiber product comprising the cloth tape according to
any one of claims 1 to 20, which is any one fiber product selected
from the group consisting of protective clothing,
fire-fighting fireproof clothing, fire fighting clothing,
rescue clothing, a workwear, a police uniform, Self-Defense
Forces official clothing, and military clothing.