JPH10158959A - Pile cloth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a natural fur-like pile cloth giving a characteristic curve of compressive stress to thickness exhibiting a maximal point or an inflection point, excellent in resilience or voluminous feeling and having soft surface touch feeling by using acute yarn end component containing specific modified cross-section acrylic fibers. SOLUTION: This pile cloth is obtained by weaving acute yarn end component containing >=10wt.% of acrylic fibers composed of an acrylonitrile-based polymer containing >=40wt.% of acrylonitrile and having a flat cross section of a flatness (a/b) (a) is length of long side and (b) is length of short side} of 5-25 and projections continued to the fiber direction on each long side and having a width W of (b/2) to (3b) and a height H of (b/2) to (2b) in a number of 1 to (a/2W) pieces or a modified cross section of Y-letter, a cross or a rhombus shape and having 0.5-10 de single fiber denier. When a pile cloth used the acute yarn end component is subjected to a compression test and a characteristic curve comprising compressive stress to thickness is plotted, the compressive stress attains 0.2-9gf/cm<2> as a maximal value and once passes at <=3/5, preferably <=1/10 of the maximal value before compressive strain attains 30%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile fabric having both softness and elasticity and used for clothing, bedding, rugs and the like.

[0002]

2. Description of the Related Art In general, natural fur is made of a fiber whose tip is thinner than a root portion.

In recent years, the use of natural fur has tended to be refrained from the viewpoint of protection of the natural environment, and synthetic fibers are used, which is close to natural fur, that is, the surface has a soft texture,
There is a strong need for the development of pile products that are firm and voluminous when pressed down.

[0004] Among synthetic fibers, since a soft texture is particularly easy to obtain, many pile products made of acrylic fiber and made to resemble fur have been commercially available, but fibers having a uniform thickness have to be used. Therefore, if the thickness of the fiber is the same as that of the root of the natural fur, it has a waist but a rough texture, and if the fiber has the same thickness as the tip of the natural fur, it has a waistless texture.

The following are known techniques for obtaining a pile product using synthetic fibers having a texture closer to natural fur.

(A) A technique utilizing the fact that a fiber having a flat cross section or an elliptical cross section bends easily in at least one direction to give a soft touch as compared with a fiber having a circular cross section of the same fineness (for example, No. 50-59524).

(B) A technique for sharpening the tip of a pile of a pile product made of polyester fiber by immersing it in an aqueous alkaline solution to hydrolyze the product (Japanese Patent Laid-Open No. 55-16906). A technique of sharpening by dipping in an aqueous solution (Japanese Patent Application Laid-Open No. 56-1342)
No. 72).

(C) A technique of giving a unique texture with a soft touch to the thickness of the root portion by applying a force to the cross section of the fiber to form a Y-shaped cross section where the tip is split. No. 1-51564).

(D) the fineness is in the range of 1.5 to 4d,
A technology to improve the soft feel and pile handling property of the pile surface by using a fiber whose cross section is flat, bent in the long side direction, and has 1 to 6 protrusions on the outer periphery of the fiber. JP-A-2-200808).

However, there has been a demand for a material having a texture close to that of natural fur.

[0011]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pile fabric having a natural fur texture which has a waist and a voluminous feel but has a soft surface feel.

[0012]

SUMMARY OF THE INVENTION The gist of the present invention is that when a pile fabric is compressed in the thickness direction, a compression strain of 3 is obtained on a characteristic curve plotting the compression stress against the thickness.
The pile fabric is characterized in that the compressive stress becomes maximum before reaching 0% or has an inflection point.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The pile fabric of the present invention is not particularly limited in its structure, but a pile fabric by sliver knitting is preferred. Since the pile part of sliver knitting is made of spun yarn, it is easy to obtain a feeling of bulkiness and achieves both a volume feeling and a soft touch on the surface compared to other pile cloths such as milling bores and woven bores Pile fabric is easy to obtain.

In the pile fabric of the present invention, when compression is applied to the pile fabric in the thickness direction, the compression stress is reduced until the compression strain reaches 30% on a characteristic curve plotting the compression stress against the thickness. It is necessary to have a maximum or an inflection point.

[0015] The pile fabric of the present invention has a strong feel while being soft to the touch when lightly touched.

The above-mentioned "compressive stress becomes maximum, or
The "having inflection point" phenomenon is considered to correspond to the pile buckling due to compression. That is, the process in which the compressive stress rises to the local maximum value or the inflection point is a situation in which the pile is resistant to being crushed, that is, the strength of the waist, and in the process in which the compressive stress decreases from the local maximum value, Critical compressive stress is reached and deformation occurs at once.

A pile fabric in which the compression strain exceeds 30% when the pile fabric is compressed in the thickness direction and inflection points or local maxima do not appear even when the napped portion completely lies down has a weak waist. It will be of poor quality. On the other hand, in the case of a pile fabric having an inflection point or a maximum value after the compressive strain exceeds 30%, the feel when touched lightly is soft but stiff.

In the present invention, after the compressive stress has reached a maximum, it is once less than 3/5 of the maximum value, more preferably 1/5.
When it is 10 or less, a better texture is exhibited. This is because the pile fabric shows obvious buckling, so that the pile fabric has a strong waist while having a soft touch when lightly touched. If the compressive stress does not become 3/5 or less of the maximum value after passing the maximum value, the touch when touched lightly becomes a slightly hard texture.

In the pile fabric of the present invention, a pile fabric having a maximum value of compressive stress of 0.2 to 9 gf / cm ² is more preferable. With a pile fabric having a maximum value exceeding 9 gf / cm ² , the feel when touched lightly is felt slightly hard,
Pile fabrics of less than 0.2 gf / cm ² or no maximum appear more soft to the touch when gently touched, but tend to lack bulkiness and have relatively weak waist.

The pile fabric of the present invention is preferably composed of fibers made of an acrylic polymer containing acrylonitrile in an amount of 40% by weight or more, from the viewpoint of facilitating the appearance of animal hair texture. In particular, when used in combination with shrinkable acrylic fibers or other acrylic fibers, fibers made of an acrylonitrile-based polymer containing 90% by weight or more of acrylonitrile are preferable. When the content of acrylonitrile is less than 40% by weight, the thermal properties, the clarity of dyeing, and the coloring of the fiber are deteriorated.

The unsaturated monomer used as a copolymer component of acrylonitrile is not particularly limited. Examples thereof include acrylic acid, methacrylic acid, and derivatives thereof, vinyl acetate,
Acrylamide, methacrylamide, vinyl chloride, vinylidene chloride, and, depending on the purpose, ions such as sodium vinylbenzenesulfonate, sodium allylsulfonate, sodium methallylsulfonate, sodium-p-sulfonylmethallyl ether, and sodium acrylamidomethylpropanesulfonate Unsaturated monomers can be used.

The molecular weight of the acrylonitrile-based polymer is not particularly limited as long as it is within the range usually used for the production of acrylic fiber. When a 0.5% by weight dimethylformamide solution is used, the reduced viscosity at 25 ° C. is 1%. It is preferably in the range of 0.5 to 3.0.

The pile fabric of the present invention has the best texture when it is sliver knitted and contains 10% by weight or more of the following fibers (1) to (4) as a stab component. Become.

(1) The length of the long side is a,
The length of the short side is b, the oblateness (a / b) is 5 to 25, and each long side has a protruding shape having a width W and a height H continuous in the fiber axis direction. A flat acrylic fiber having a protruding number of sides of 1 to a / 2W, a width W of b / 2 to 3b and a height H of b / 2 to 2b and a single fiber fineness of 0.5 to 10 denier.

(2) As a stabbing component, the fiber cross-sectional shape is Y
When the length of the branch portion of the Y-shape is a and the thickness of the branch at the base is b, the thickness at a position a / 2 from the tip of the branch is 0.4b to 1.5b. A modified acrylic fiber having a ratio of a / b of the length of a branch portion to the thickness of a branch root portion of 2 to 6, and a single fiber fineness of 0.5 to 10 denier.

(3) As the stinging component, when the fiber cross-section is a cross and the length of the cross branch is a, and the thickness of the branch at the base is b, a / 2 from the tip of the branch Is a thickness of 0.4b to 1.5b, a ratio a / b of the length of the branch portion to the thickness of the branch root portion is 1 to 5, and the single fiber fineness is 0.5 to 8 denier. Acrylic fiber cross section.

(4) As the stabbing component, when the fiber cross-section is rhombic and the length of the diagonal of the rhomb is a, b (a> b), the diagonal ratio a / b is 1.2 to 3.5,
Acrylic fiber with irregular cross section having a single fiber fineness of 0.5 to 10 denier.

In any of the above-mentioned methods (1) to (4), when the content of the modified cross-section yarn in the stabbing is less than 10% by weight, the effect of the modified cross-section yarn cannot be sufficiently exerted and the texture is improved. Does not contribute.

In order to obtain such a modified cross-section yarn, the acrylonitrile-based polymer is dissolved in a solvent so as to have a concentration of 15 to 28% by weight to prepare a spinning dope, and a spinning solution having a pore shape substantially similar to the fiber cross-sectional shape to be obtained. Spin from the die. If the concentration of the acrylonitrile-based polymer in the spinning dope is less than 15% by weight, the difference between the hole shape of the spinneret and the cross-sectional shape of the fiber during coagulation is not preferable. Meanwhile, 2
If it exceeds 8% by weight, the stability of the spinning dope with time will deteriorate,
It is not preferable because the spinning solution decreases.

As the solvent, an organic solvent such as dimethylacetamide, dimethylformamide, dimethylsulfoxide and the like, and an aqueous solution of nitric acid, a rodane salt and an aqueous solution of zinc chloride can be used. The cross-sectional shape of the fiber is controlled by the hole shape of the spinneret. In this case, an organic solvent is advantageous.

By drawing the spinning draft defined by the ratio of the drawing speed of the coagulated yarn and the discharge linear speed of the stock spinning solution so as to be in the range of 0.7 to 2.0, the spinning draft is substantially similar to the hole shape of the spinneret. An acrylic fiber having a cross-sectional shape can be obtained. When the spinning draft is less than 0.7, it is difficult to obtain a fiber cross section similar to the nozzle hole shape. On the other hand, if the spinning draft exceeds 2.0, yarn breakage in the coagulation bath increases, making it difficult to obtain the fiber itself.

The obtained coagulated yarn is stretched, washed and dried by a factor of 3 to 10 according to known methods and conditions, subjected to a heat relaxation treatment according to the application, and imparted with balanced mechanical properties. By cutting, it becomes the acrylic fiber used in the present invention.

When the content of the acrylic fiber used in the present invention in the pile fabric is less than 10% by weight, the elasticity becomes insufficient. Although this raw cotton can be used alone, it can be used in combination with a regular raw cotton of 20% by weight or more or a raw cotton that shrinks by 15% or more by dry heat or wet heat.
Stable processability during sliver production is obtained.

[0034]

EXAMPLES The present invention will be described more specifically with reference to the following examples. The performance evaluation was performed by the following method. (Reduced viscosity) The reduced viscosity of the polymer was measured with a 0.5% dimethylformamide solution at 25 ° C using a Cannon-Fenske viscometer.

(Compression test) K, manufactured by Kato Tech Co., Ltd.
In the FB-3 tester of the ES-FB system, a compression test was performed with a pressurized area of 2 cm ² .

Example 1 A copolymer comprising 93% by weight of acrylonitrile and 7% by weight of vinyl acetate having a reduced viscosity of 1.95 was obtained by an aqueous suspension polymerization method. Subsequently, the polymer was dissolved in dimethylacetamide to obtain a spinning dope having a polymer concentration of 25% by weight. This spinning solution is wet-spun using a flat-shaped nozzle die with a hole shape having a ridge,
The film was stretched 5 times while washing the solvent in boiling water, and then an oil agent was adhered and dried with a hot roller at 150 ° C. Furthermore,
Relaxation treatment is performed in a 2.5 kg / cm ² pressurized steam, cut into 51 mm lengths, the long side is 76.7 μm, the short side is 5.9 μm, and the continuous width of each long side in the fiber axis direction is Raw cotton consisting of a flat cross-section fiber having a single fiber fineness of 6 denier and having one semicircular ridge having a height of 16.8 μm and a height of 5.9 μm was obtained.

The raw cotton 80% by weight, the fiber length 32 mm,
20% by weight of raw cotton bonnel V173d (manufactured by Mitsubishi Rayon Co., Ltd.) composed of sola bean cross-section acrylic fiber having a single fiber fineness of 3 denier was mixed to prepare a sliver having a weight of 10 g / m, and the sliver knitting machine was used. A pile fabric weighing 1050 g per 1.5 m ^{2 of} fabric was obtained.

The acrylic resin solution was sprayed on the back surface of the knitted fabric by a resin sprayer, and then cured by a dryer. Next, after the pile was sufficiently separated by brushing, excess pile was removed by a polisher and a shearing machine, and the crimp of the fiber was removed by repeated polishing. A high pile with a pile length of 18 mm was obtained by shearing.

The obtained high pile fabric was compressed at a compression speed of 0.2.
When the compression was performed at a rate of 10%, the compressive stress was maximized (1.3 gf / cm ² ).
It was observed that the compressive stress once decreased to 0.7 gf / cm ² and then increased. In fact, in a sensory test conducted by human hands, it was found that the feel of the surface was soft and unique, despite the feeling of waist and volume.

(Embodiment 2) The hole shape of the nozzle to be used is Y
The wet spinning was performed in the same manner as in Example 1 except that the shape was changed to a letter shape, and the length of the branch portion was 30.1 μm, and the thickness of the central portion of the fiber was 6.2 μm.
m, raw cotton consisting of Y-shaped cross-section fibers having a single fiber fineness of 6 denier and a fiber length of 89 to 140 mm was obtained.

In the same manner as in Example 1, a high pile was processed and a compression test was performed. As a result, when the compressive strain becomes 16%, the compressive stress is maximized (1.0 gf / cm ² ).
It was observed that the compressive stress once decreased to 0.5 gf / cm ² and then increased. In fact, in a sensory test conducted by human hands, it was found that the feel of the surface was soft and unique, despite the feeling of waist and volume.

(Example 3) 20% by weight of raw cotton composed of Y-shaped cross-section fiber obtained in Example 2, length of branch portion 35.8 μm separately prepared by changing spinning conditions, thickness of fiber central portion 8.
5 µm, single fiber fineness 10 denier, fiber length 89-140
20% by weight of raw cotton made of Y-shaped cross section yarn of mm, fiber length 89
20% by weight of raw cotton bonnel V175d (manufactured by Mitsubishi Rayon Co., Ltd.) made of sora bean-shaped cross-section acrylic fiber having a fiber denier of 5 denier and a fiber length of 76 to 127 mm
40% by weight of shrinkable raw cotton bonnel V173d (manufactured by Mitsubishi Rayon Co., Ltd.) made of sola bean-shaped cross section acrylic fiber having a boiling water shrinkage ratio of 27 to 29%, and spinning with a metric number of 2/28 by worsted spinning. Yarn was obtained.

After rewinding the yarn into a scallop, the yarn was dyed by a scalpel dyeing machine. By this dyeing, the shrinkable fiber shrinks to obtain a bulky yarn. Next, the dyed spun yarn is re-wound into a cone, set on a woven pile loom, and spun yarn of 100% polyester with a 30/2 English cotton count is used for the warp and the weft of the ground weave structure, and the density of the pile yarn is 32. Pile fabrics having 96 / inch and 38 / inch warp / weft yarns, respectively, were obtained.

Next, an acrylic ester resin solution was sprayed on the back surface of the pile fabric by a resin sprayer, and then cured by a dryer. Next, after the pile is sufficiently separated by brushing, the excess pile is removed by a polisher and a shearing machine, and then the crimp of the fiber is removed by repeated polishing. The pile length is 11 mm per unit area by shearing. A woven pile fabric having a fabric weight of 600 g / m ² was obtained.

The obtained woven pile fabric was subjected to KE
Compression speed is 0.2mm / s by S-FB3 compression tester
When a compression test and a texture sensory test of ec were performed, in the compression test, the pile height of 9 from the start of compression to the height before compression was measured.
When compressed to a height of 1%, the compressive stress is 8.7 g
f / cm ^{2 and} the compressive stress is once 3.9 gf
/ Cm ² and then increasing. In addition, in a sensory test of this cloth by hand, a soft and resilient texture was confirmed.

(Embodiment 4)
Wet spinning was performed in the same manner as in Example 1 except that the ratio of the thickness of the branch portion to the length of the branch portion was changed to a cross shape of 1: 1 to obtain a cross-section yarn having a single fiber fineness of 2 denier and a fiber length of 51 mm. Was. The cross-sectional shape of the obtained cross-section yarn was 6.2 μm in both thickness and length of the branch portion.

80% by weight of this raw cotton and 80% by weight of acrylic fiber having a cross section of 3 denier sora beans used in Example 1 were mixed, and a high pile having a pile length of 17 mm was obtained through a sliver.

As a result of performing a compression test in the same manner as in Example 1, when the compressive strain became 20%, the compressive stress reached a maximum (2.0 gf / cm ² ) and was once reduced to 1.0 gf / cm ² .
It was observed that it decreased to gf / cm ² and then increased. In fact, in a sensory test by human hands, it was found that the feel of the surface was soft and unique in spite of the feeling of waist and volume.

Example 5 Wet spinning was carried out in the same manner as in Example 1 except that the nozzle used had a diamond shape with a diagonal length of 2: 1. The diagonal length was 27.8 μm each.
And 14.0 µm, single fiber fineness 2 denier, fiber length 51 m
Thus, a m-shaped rhombic section yarn was obtained.

A compression test was performed by processing into a high pile having a pile length of 17 mm in the same manner as in Example 4 except that a rhombic cross-section yarn was used instead of the cross-section yarn. As a result, when the compressive strain became 12%, the compressive stress reached the maximum (0.6 gf
/ Cm ² ), and it was observed that the compressive stress once decreased to 0.4 gf / cm ² and then increased. In fact, in a sensory test by human hands, it was found that the feel of the surface was soft and unique in spite of the feeling of waist and volume.

Comparative Example 1 A flat cross-section yarn having a single fiber fineness of 6 denier was obtained by wet spinning in the same manner as in Example 1, except that the hole shape of the nozzle used was changed to a rectangle having an aspect ratio of 1:13. Was. In the cross-sectional shape of the obtained flat cross-section yarn, the thickness of the central portion of the fiber was 6.8 μm, and the length of the long side was 85.8 μm. In the same manner as in Example 1, a high pile was processed and a compression test was performed. When the compressive stress was plotted against the thickness, neither a maximum nor an inflection point appeared on the characteristic curve. In addition, the texture obtained by the sensory test by a human hand was soft, but poor in elasticity, and the pile was easy to sleep.

[0052]

As described above, the pile fabric of the present invention has a texture similar to that of natural fur, but has a waist and a voluminous feel and a soft texture on the surface.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshihiro Nishihara 20-1, Miyukicho, Otake City, Hiroshima Prefecture Inside Mitsubishi Rayon Co., Ltd. Otake Works (72) Inventor Michiko Iwata 4-160 Sunadabashi, Higashi-ku, Nagoya City, Aichi Prefecture No. Mitsubishi Rayon Co., Ltd. (72) Inventor Mitsuo Tanaka 4-160 Sunadabashi, Higashi-ku, Nagoya City, Aichi Prefecture Mitsubishi Rayon Co., Ltd. Product Development Laboratory

Claims (9)

[Claims] When a compression in a thickness direction is applied to a pile fabric, the compression stress becomes a maximum until the compression strain reaches 30% on a characteristic curve plotting the compression stress against the thickness, or Pile fabric having an inflection point. 2. The pile fabric according to claim 1, wherein after the compressive stress reaches a maximum, the pile stress temporarily becomes 3/5 or less of the maximum value. 3. The pile fabric according to claim 1, wherein after the compressive stress reaches a local maximum, the compressive stress temporarily becomes 1/10 or less of the local maximum value. 4. The maximum value of the compressive stress is 0.2 to 9 gf / c.
pile fabric according to any one of claims 1 to 3 is m ^2. 5. The pile fabric according to claim 1, wherein the fibers constituting the pile are acrylic fibers made of an acrylonitrile-based polymer containing 40% by weight or more of acrylonitrile. 6. A bristle component having a length of a long side a, a length of a short side b, an oblateness (a / b) of 5 to 25, and a width continuous to each long side in the fiber axis direction. Has a protruding shape of W and a height of H, the number of protruding shapes on each long side is 1 to a / 2W, and the width W is b / b.
The pile according to any one of claims 1 to 5, wherein the pile contains at least 10% by weight of a flat acrylic fiber having a fiber size of 0.5 to 10 deniers having a thickness of 2 to 3b and a height H of b / 2 to 2b. Fabric. 7. As the stabbing component, when the fiber cross-sectional shape is a Y-shaped cross-section and the length of the Y-shaped branch portion is a and the thickness of the branch at the base portion is b, a The thickness at the position of / 2 is 0.4b to 1.5b, the ratio a / b of the length of the branch portion to the thickness of the branch root portion is 2 to 6, and the single fiber fineness is 0.5 to 10 denier. The pile fabric according to any one of claims 1 to 5, wherein the pile fabric contains at least 10% by weight of an irregular cross-section acrylic fiber. 8. When the cross-section of the fiber is a cross, and the length of the branch portion of the cross is a, and the thickness of the branch at the base portion is b, a / 2 of the length of the branch from the tip of the branch is used. A modified cross-section in which the thickness at the position is 0.4b to 1.5b, the ratio a / b of the length of the branch portion to the thickness of the branch root portion is 1 to 5, and the single fiber fineness is 0.5 to 8 denier The pile fabric according to any one of claims 1 to 5, comprising at least 10% by weight of an acrylic fiber. 9. As the stabbing component, when the fiber cross-sectional shape is a rhombus and the length of the diagonal of the rhombus is a, b (a> b), the diagonal ratio a / b is 1.2 to 3 The pile fabric according to any one of claims 1 to 5, which comprises at least 10% by weight of a modified cross-section acrylic fiber having a single fiber fineness of 0.5 to 10 denier.