KR100362430B1 - Pile products and pile compositions - Google Patents

Abstract

It is an object of the present invention to provide a pile product of natural fur composition having properties closer to natural fur, that is, soft touch of natural fur and color effect by a two-layer structure, and excellent hair blooming as a hair structure close to natural fur.

As the constitution, 20 to 98% by weight of shrinkable fibers, 3 to 40 deniers, are undiluted colored acrylic synthetic fibers having a pile portion having a denier of 1 to 10, a shrinkage ratio of 15% or more, and a fiber-fiber static friction coefficient of 0.230 or less. And a non-shrinkable fiber having a flat or oval cross section and having a pile length of 2 to 70 mm between the shrinkable fiber and the non-shrinkable fiber.

Description

Pile products and pile compositions

(Industrial use)

The present invention has a soft touch of natural fur, a color effect by a two-layer structure approximating natural fur, and a hair structure approximating natural fur. The present invention relates to a pile composition capable of obtaining a pile product such as natural fur having excellent blooming.

(Prior art)

Natural fur has a two-layer structure of guard hair and down hair, and has excellent advantages in touch, appearance, and functionality, and is mainly used for medical care. Mink, for example, consists of a thin and short downhair, which occupies about 70-80%, and a thick and long guardhair, which occupies about 20-30%. He also helps blooming. In addition, the two-layer structure of down hair and guard hair gives color effect and soft feeling. In the past, various researches have been conducted on the material of piles and knitting techniques of piles to bring pile products closer to the characteristics of natural fur.

For example, one of them is a thin, short, non-shrinkable fiber and a thick, long ratio to express the hair structure and the two-layered structure of natural hair when manufacturing artificial hair with a high pile. It is a method of blending shrinkable fibers and producing them. In this method, however, thin and short non-shrinkable fibers were not substantially constant in pile length, and thus could not exhibit a two-layer structure close to natural fur and the resulting color effect.

In addition, a method of producing a mink-like artificial fur composed of two layers of thin and short piles and thick and long piles is known by knitting a pile of fine shrinkable fibers and a thick non-shrinkable fiber and then shrink-processing the shrinkable fibers. . However, shrinkable fibers generally cause shrinkage in the dyeing process, so they do not have shrinkage after dyeing and are contracted by shrinkage processing after knitting of the pile, resulting in short piles of long piles of non-shrinkable fibers. It is impossible to call a layered structure, and it is impossible to use colored shrinkable fibers with this method. For this reason, the shrinkable fibers used in this method are limited to the use of only undyed natural colors. For this reason, the color effect is limited, and in particular, the soft touch required for the mink and sable baths, the color effect by the two-layer structure approximating natural fur, and the blooming by the hair structure are not sufficiently exhibited.

In addition, the pile products using the above-mentioned undyed shrinkable fibers are entangled with the shrinkable fibers at the time of shrinkage processing after the knitting of the pile, and the shrinkable fibers are wound around the non-shrinkable fibers and shrunk. Because of the strong entanglement of the fiber in unfolding (polishing finish), only the portion close to the surface of the pile has its effect, and the finishing state of the pile hair is significantly lower than that of natural fur. In addition, it has a strong gritty feeling and a large lack of drape of pile microfibers.

In view of this situation, the present inventors have found the cause of these phenomena, and as a result, have focused on the interlocking resistance between the core oils after the shrinkage processing process, which is considered to be the biggest reason, and succeeded in solving the problem. The pile composition of Unexamined-Japanese-Patent No. 60-2O9O48 is the same. This pile composition contains 20 to 98% by weight of shrinkage fibers having a shrinkage of 15% or more and a fiber-fiber static friction coefficient of 0.230 or less as the fiber of the pile portion, and a small coefficient of static friction between the shrinked fibers. The file product obtained by the entanglement between the fibers becomes smaller during the subsequent shrinkage processing and the crimping is easier to be applied during the subsequent soft processing. The file product is excellent in appearance, and the file after the shrinkage also has a weaker entanglement between the fibers. Therefore, a pile rich in drape property is obtained.

The present invention, in view of the problems of the conventional natural fur file pile products described above, by using the proposed shrinkable fibers, which is closer to natural fur, that is, has a soft touch and natural color effect of the two-layer structure and natural It is an object of the present invention to provide a pile product of a natural furry wool having excellent blooming properties as a hair structure close to fur and a pile composition from which such pile products can be obtained.

(Means to solve the task)

That is, in the pile product of the present invention, the pile portion is composed of a short pile in which colored shrinkable fibers are shrunk by shrinkage processing after pile knitting, and a long pile of non-shrinkable fibers. The point is that the difference in length is 2 to 70 mm. When the difference between the pile length of the short pile and the long pile is less than 2 mm, the pile height of the single pile as the down hair and the long pile as the guard hair is approached and the single pile effect due to the two-layer structure. Can't expect it. Moreover, when the difference of pile length exceeds 70 mm, since the color effect falls, it is unpreferable. Also, in the present invention, the pile product refers to a pile fabric made of a sliver knitter using a slider and a foundation yarn made of a fiber material constituting the pile, and then coated with an adhesive on the back and dried. Refers to a common file product.

In the pile product of the present invention as described above, the material constituting the pile portion is a pile composition composed of a mixture of colored shrinkable fibers and non-shrinkable fibers.

The component of the colored shrinkable fiber used in the pile composition may be a thermoplastic polymer, but preferably an acrylic copolymer. As the composition of the acrylic synthetic fiber, a copolymer composed of 30% by weight or more of AN (acrylonitrile) is obtained by copolymerization of AN with one or two or more polymerizable monoolefinic monomers. If the AN is less than 30% by weight, the touch is far from the texture of the animal's hair and there is a sticky feeling, so there is no mass feeling, and shrinkage processing and polishing finish are necessary under special conditions. Suitable monoolefinic monomers are, for example, acrylic acid esters, methacrylic acid esters, acrylamides, methacrylic amides, or monos thereof. Dialkyl substituents, acrylic acid, methacrylic acid, itaconic acid, vinyl chloride, vinylylidene chloride, vinyl acetate Vinyl esters such as vinyl esters, vinyl pyrrolidine, vinyl pyridine or their alkyl substituents, styrenesulfonic acid, allylsulfonic acid, merylrylsulfonic acid , Paramethacryloyloxybenzenesulfonic acid, methacryloyloxypropylsulfonic acid, 2-acrylamide , 2-methylpropylsulfonic acid, metal salts thereof and amine salts thereof. In the present invention, any conventional monoolefinically unsaturated compound capable of copolymerizing with acrylonitrile can be used without requiring such rigidity with respect to the copolymerizable monomer.

The acrylic copolymer is a conventional vinyl polymerization method using a conventional compound such as a peroxide compound, an azo compound or various redox compounds as a polymerization initiator. Can be made with

The acryl-based copolymer is dissolved in an organic solvent such as acetone, acetonitrile, dimethylformamide, dimethylacetamide, dimethylsulfoxide, and the like to form a spinning stock solution. (紡絲 原液) to be. This spinning stock solution is extracted with a nozzle by a normal wet or dry spinning method, followed by stretching and drying. Moreover, you may stretch and heat-process as needed. In this way, a fiber having shrinkage can be obtained.

The shrinkable fiber used in the present invention has a shrinkage rate of 15% or more. By stretching the filament obtained as described above at 1.2 to 4.0 times at 70 to 140 ° C., a shrinkable fiber of 15% or more as described above can be obtained.

As described above, the shrinkable fiber used in the present invention is preferably a thermoplastic fiber having a shrinkage rate of 15% or more, preferably 20% or more. The reason for this is that when the pile knitted fabric is made of fibers having a shrinkage of not more than 15%, the guard hair part and the shrinkable fiber made of non-shrinkable fiber shrink and the pile height of the down hair part approaches and the effect of the two-layer structure, In other words, the file effect is reduced.

The reason for using the thermoplastic fiber is that it can be expected to crimp the fiber by a later polishing effect, that is, a hot roller with an edge. In addition, the term "shrinkage rate" as used in the present invention refers to the length of the fiber which has been contracted by wet heat or dry heat treatment, the length of the fiber that has been shrunk in the pile knitting processing, or the conditions similar to the shrink processing environment. Compared to the length of the pre-shrink fiber compared to the length of the pre-shrink fiber, the ratio of shrinkage displacement to the pre-shrink fiber length is expressed as a percentage (%). In other words, the term "shrinkage rate of 15% or more" means that the wet heat shrinkage rate and the dry heat shrinkage rate are both 15% or more.

The fineness of the colored shrinkable fiber in the present invention is preferably 1 to 10 d (denier, hereinafter abbreviated as "d"), and 2 to 7 d are optimal.

Moreover, 20-64 mm is preferable and 25-51 mm is optimal before the shrinkage of the fiber length of this colored shrinkable fiber. There is no particular limitation as to the cross-sectional shape of the colored shrinkable fibers, but it is circular, hollow, elongated, cocoon, flat, oval, three-lobed, four-lobed, five-lobed. What is necessary is just to select from shapes, such as.

The color of the colored shrinkable fibers of the present invention is selected from the actual color and fancy color assumed natural fur. As a coloring agent for coloring this shrinkable fiber, there exist a dye and a pigment, and these are used individually or in combination. As a dye, a general cation dye is preferable, and as a counter ion, a chlorine ion, an alkyl sulfonic acid ion, an alkyl naphthalene sulfonic acid ion, a dialkyl sulfobacmic acid, and an alkyl diphenyl ether disulfonic acid ion are mentioned. Pigments are known for their organic expiration and inorganic pigments, although carbon black is used. In the coloring method, the dye or pigment is dissolved or dispersed in an organic solvent or a part of the spinning stock solution and then mixed in the spinning stock solution.

When mixing the salt solution or dispersion liquid containing a coloring agent with a spinning stock solution, it is necessary to mix uniformly. As a method of mixing, for example, a saline solution or a dispersion solution is directly added to a spinning stock tank and stirred by uniform mixing, or a line mixing using a line mixer or the like is also possible. As a method generally called gel dyeing, there is also a coloring method using a cation dye during the solidification process of wet spinning. Of course, stabilizers, fluorescent pigments, dulling agents, and the like, which are necessary for the properties of the fibers, may be added to the spinning stock solution.

On the other hand, the non-shrinkable fiber used simultaneously may be a colored fiber or a non-colored fiber. The uncolored fibers may also be used by dyeing with a so-called over maier dyeing machine or the like. In the present invention, "non-shrinkable fiber" means 10% or less shrinkage. As for the fineness of this non-shrinkable fiber, 3-40 d is preferable and 5-30 d is optimal. The non-shrinkable fiber has a good pre-shrinkage of 25 to 127 mm and an optimum 38 to 89 mm. The cross-sectional shape of the non-shrinkable fiber may be selected from round, hollow, elongated, cocoon, flat, oval, three-lobed, four-lobed, five-lobed, etc. For visual appeal, flat and oval ones are preferred. This shrinkable fiber can be arbitrarily selected from fineness, fiber length, color, and shrinkage rate, and can be used as two or more types of blended surfaces.

And the pile product of this invention is manufactured as follows. That is, after the colored shrinkable fibers and non-shrinkable fibers are mixed, card slivers are made through an opener and a card. Next, sliver knitting is performed with a high pile knitting machine. Here, prepolishing and preshearing are important processes in order to obtain a color effect by the two-layer structure and a structure close to natural fur. After the pile is uniformly cut at the foundation, the back of the pile is coated with an acrylic ester adhesive or the like. At that time, by steaming the back of the pile fabric (pile fabric: pile fabric) by shrinking the shrinkage fibers of the pile to form a colored short pile and improve the adhesiveness of the adhesive. Continue drying, for example, 130 ° C X 5 minutes, and complete the shrinkage process. After that, high temperature (140 ~ 165 ° C) polishing and brushing (brushing), medium temperature (130 ~ 110 ° C), low temperature (100 ~ 80 ° C) of the combination of the cutting and cutting to produce a high pile. In the resultant pile product, it is preferable that the shrinkage fibers colored as fibers in the pile portion contain 20 to 98% by weight, preferably 40 to 70% by weight, of all the fibers in the pile portion shrinked by shrinkage processing after knitting. Do. Even if the short pile made of the shrinkable fibers is less than 20% by weight and more than 98% by weight, sufficient two-layer structure is not expressed.

As described above, the pile composition of the present invention,

The pile part is composed of a colored short pile of non-shrinkable fibers and colored short piles in which the shrinkable fibers are shrunk by shrinkage processing after knitting of the pile, using a pile composition composed of colored shrinkable fibers and non-shrinkable fibers. Colored shrinkable fibers composed of short piles having a selected static friction coefficient are, for example, colored by undiluted solution, and thus are not subjected to heat during dyeing, and thus are entangled between fibers by sufficient polishing effect in the finishing process of high piles. This is alleviated and a soft touch and blooming property are obtained. And this pile product uses pile composition mixed with colored shrinkable fiber and non-shrinkable fiber as pile material, and it generates pile length difference of 2 ~ 70mm between the short pile and long pile by the combination of processing method. It has a two-layer structure close to fur and a filamentous structure, and color effects and blooming by the two-layer structure are obtained.

(Example)

Hereinafter, an embodiment of the present invention will be described, but prior to the description of the embodiment,

The performance evaluation method of the fiber provided for a test, etc. are described.

(1) wet heat shrinkage

Measure the length (Lw) under 10 mg / d load before shrinkage, shrink for 3 minutes with a sting under normal pressure, return to room temperature, and measure the length (L'w) under 10 mg / d load. Shrinkage is calculated by the following equation.

Shrinkage (%) = [(Lw-L'w) / Lw] X 100

(2) dry heat shrinkage

Measured according to the measurement of wet heat shrinkage, but treatment is carried out at 130 ° CX for 20 minutes in a uniform oven. The shrinkage rate is determined by measuring the length L _D before shrinkage and the length L' _D after shrinkage.

Shrinkage (%) = ((Ld-L ' _D ) L _D × 100

(3) performance evaluation of file products

From a visual and sensory point of view, five judges with knowledge of this file made ① soft feeling, ② evaluation of blooming, ③ color effect by two-layer structure, and ④ natural hair. 3 levels of evaluation, dissatisfied 1-5 points (x), slightly satisfied 6-10 points (△),

11-15 points | pieces were made into satisfaction ((circle)).

(Example 1)

Elongated cross section, with a coefficient of static friction between fibers and fibers of 0.220, fineness of 4d, and fiber length of 32 mm, undiluted shrinkable modacrylic fabric (30% dry heat shrinkage, dark brown color) colored by undiluted solution. 18 g / m sliver fully blended with a pile product consisting of 60% by weight of non-shrinkable modacrylic fiber (4.0% dry heat shrinkage, color brown) with 15 d fineness and 51 mm fiber length with a flat cross section Made. Subsequently, two parallel foundation yarns of polyester filament 150d are used and pile fabrics are made using a sliver knit machine. After pre-polishing and cutting, the pile length is 17 mm, and the back of the pile is coated with an acrylic ester adhesive. Subsequently, at the same time as drying, the shrinkable fibers are sufficiently contracted. After that, polishing and brushing at 155 ° C is combined with grinding and cutting at medium temperature (120 ° C) and low temperature (90 ° C) to produce a mink-like high pile with a pile length of 23 mm. In this pile product, the pile length difference between the colored short pile as the down fish and the long pile as the guard hair is 11 mm, and the ratio of the short pile in the fiber of the pile is 53% by weight.

(Example 2)

Elongated cross section, with a coefficient of static friction between fibers and fibers of 0.225, fineness of 3 d, and fiber length of 32 mm, undiluted shrinkable modacrylic fibers (30% dry heat shrinkage) with undiluted solution by cation dye and carbon black , Color black) 40% by weight, flatness in cross section is 15 d, fiber length is 51 mm, and 40% by weight of non-shrinkable modacrylic fiber (4.0% dry heat shrinkage) colored in undiluted solution in black, and flatness in fine cross section A mink-like high pile was obtained in the same manner as in Example 1 using a pile composition consisting of 20 wt% of a non-shrinkable modacrylic fiber (dry heat shrinkage rate of 4.0%), 20 d, having a fibrous length of 51 mm as a stock solution. In this pile product, the pile length difference between the colored short pile as the down hair and the long pile as the guard hair is 11 mm, and the ratio of the short pile in the fiber of the pile is 53% by weight.

(Example 3)

30% by weight of shrinkable modacryl fiber (20% dry heat shrinkage, color brown) colored by undiluted solution with a pigment-to-fiber static coefficient of 0.190, fineness of 4d, and fiber length of 32 mm as a stretched cross section. 30 d of non-shrinkable acrylic fibers (4.0% dry heat shrinkage) dyed in beige color with cation dye, with flatness of 10 d and fibrous length of 51 mm, with flatness of 15 d and 51 mm of fiber length. As a result, a mink-like high pile was obtained in the same manner as in Example 1 using a pile composition composed of 40% by weight of non-shrinkable modacrylic fibers (4.0% of dry heat shrinkage) dyed with cation dye. In this pile product, the pile length difference between the colored short pile as the down hair and the long pile as the guard hair is 9 mm, and the ratio of the short pile in the fiber of the pile is 53% by weight.

(Example 4)

40 mm by weight of shrinkable modacrylic fiber (30% dry heat shrinkage, dark brown color), colored by undiluted solution, with a coefficient of static friction between fibers and fibers of 0.220, fineness of 4 d, and fiber length of 32 mm. And a pile composition composed of 60% by weight of non-shrinkable modacrylic fibers (5.0% of dry heat shrinkage) having a fineness of 11 d and a fiber length of 51 mm with a flat cross section, and sufficiently mixed 18 g / m of sliver. Subsequently, two parallel foundation yarns of polyester filament (l50d) are used and pile fabrics are made using a sliver knit machine. After pre-polishing and cutting, the pile length is 25 mm, and the back of the pile is coated with an acrylic ester adhesive. Subsequently, at the same time as drying, the shrinkable fibers are sufficiently shrunk. Afterwards, 155 ° C is polished and brushed, and a combination of medium and low temperature (90 ° C) and low temperature (90 ° C) grinding and cutting is performed to make a sable set of high piles having a pile length of 30 mm. In this pile product, the pile length difference between the colored short pile as the down hair and the long pile as the guard hair is 11 mm, and the ratio of the short pile in the fiber of the pile is 42% by weight.

(Example 5)

40% by weight of shrinkable modacrylic fibers (18% dry heat shrinkage, color brown) colored by undiluted solution with a fine coefficient of static friction between fibers and fibers of 0.210, fineness of 3 d, and a fiber length of 28 mm as pigments; Fully blended pile composition consisting of 60% by weight of non-shrinkable modacrylic fiber (8.0% dry heat shrinkage) dyed flat with a flat cross section of 7 d, a fiber length of 32 mm and dyed light brown with a cation dye, and a slice of 18 g / m Created a burr Subsequently, two parallel foundation yarns of polyester filament (l50d) are used and pile fabrics are made using a sliver knit machine. After pre-polishing and shearing, the back of the pile is coated with acrylic ester adhesive. Subsequently, at the same time as drying, the shrinkable fibers are sufficiently shrunk. Afterwards, 155 ° C is polished and brushed, and a combination of medium and low temperature (90 ° C) and low temperature (90 ° C) polishing and cutting is made to produce a high pile with a length of 17 mm. The pile length difference between the colored short pile as down hair and the long pile as guard hair in this pile product is 2.0 mm and the ratio of the short pile in the fiber of the pile part is 40% by weight.

(Example 6)

Cocoon-shaped cross-section, with a coefficient of static friction between fibers and fibers of 0.230, fineness of 5 d, and fiber length of 32 mm, undiluted shrinkable modacryl fibers (40% dry heat shrinkage, color brown) with pigments. Fully blended with a pile composition consisting of 60% by weight of non-shrinkable modacrylic fiber (4.0% dry heat shrinkage) dyed lightly brown with a cation dye having an elliptical cross section of 12 d fineness and a fiber length of 127 mm with an oval cross section. I made a g / m of slicer. Subsequently, two parallel foundation yarns of polyester filament (l50d) are used and pile fabrics are made using a sliver knit machine. Pre-polishing, shearing and coating the back of the pile with acrylic ester adhesive. Subsequently, at the same time as drying, the shrinkable fibers are sufficiently shrunk. Then, 155 ° C is polished and brushed, and a combination of medium and low temperature (120 ° C) and low temperature (90 ° C) polishing and cutting is made, and a high pile having an 80 mm pile length is produced. In this pile product, the pile length difference between colored short pile as down hair and long pile as guard hair is 70 mm and the ratio of short pile in fiber of pile part is 42% by weight.

(Example 7)

Elongated cross section, with a coefficient of static friction between fibers and fibers of 0.230, fineness of 4 d, and fiber length of 32 mm, 15% by weight of shrinkable modacryl fibers (30% dry heat shrinkage, dark brown color) , With a flat cross section of 7 d fineness and 51 mm of fiber length, the fiber composition consisting of 85% by weight of non-shrinkable modacrylic fibers (4.0% dry heat shrinkage) dyed brown with a cation dye and a slice of l8 g / m. Created a burr Subsequently, two parallel foundation yarns of polyester filament (l50d) are used and pile fabrics are made using a sliver knit machine. Pre-polishing, shearing and coating the back of the pile with acrylic ester adhesive. Subsequently, at the same time as drying, the shrinkable fibers are sufficiently shrunk. Then 155 ° C is polished and brushed, and a combination of medium and low temperature (120 ° C) and low temperature (90 ° C) polishing and cutting is made, creating a high pile with a length of 25 mm. In this pile product, the pile length difference between the colored short pile as the down hair and the long pile as the guard hair is 13 mm, and the ratio of the short pile in the fiber of the pile is 20% by weight.

(Example 8)

90% by weight of shrinkable modacrylic fiber (30% dry heat shrinkage, dark brown color) colored by undiluted solution with 0.220 fineness, 4 d fineness, 32 mm fiber length and undiluted by pigment. 10 m by weight of non-shrinkable modacrylic fibers (4.0% dry heat shrinkage) dyed in the same color with a flat cross section, 20 d fineness, 51 mm fibrous dye, and cationic dyes. I made a sliver. Subsequently, two parallel foundation yarns of polyester filament (l50d) are used and pile fabrics are made using a sliver knit machine. After pre-polishing and cutting, the pile length is 20 mm, and then the back of the pile is coated with acrylic ester adhesive. Subsequently, at the same time as drying, the shrinkable fibers are sufficiently shrunk. Then 155 ° C is polished and brushed, and a combination of medium and low temperature (120 ° C) and low temperature (90 ° C) polishing and cutting is made, creating a high pile with a length of 25 mm. In this pile product, the pile length difference between the colored short pile as the down hair and the long pile as the guard hair is 13 mm, and the ratio of the short pile in the fiber of the pile is 95% by weight.

(Comparative Example 1)

As the elongated cross section, the coefficient of static friction between fibers and fibers is 0.350, the fineness is 3 d, the fiber length is 51 mm, and 40% by weight of uncolored modacrylic fiber (4.0% of dry heat shrinkage) and the flatness is 10 with fineness. d, A high pile was made in the same manner as in Example 1 using a pile composition composed of 60% by weight of non-shrinkable acrylic fibers (dry heat shrinkage rate 4.0%) dyed fibrous with a cation dye and 51 mm islands. The pile length difference between the pile as a down hair and the pile as a guard hair in this pile product is 40% by weight of the down hair pile in the fiber of the pile part.

The evaluation result of the pile composition of Example 1-Example 8 above and the comparative example 1, and the pile product obtained is shown in following Table 1.

As is apparent from the results of Table 1, the pile composition of the present invention can obtain a pile product that can be satisfied at any point on the softness, blooming, color effect, and hair growth similar to natural fur.

Claims (11)

The pile part consists of a short pile in which colored shrinkable fibers are shrunk by shrinkage processing after pile knitting, and a long pile of non-shrinkable fibers. A pile product having a difference in the pile length of the colored short file and the long file from 2 to 70 mm. The method of claim 1, The pile product of 20 to 98 weight% of colored single piles in the fiber of a pile part. Pile composition consisting of a mixture of colored shrinkable fibers and non-shrinkable fibers. The method of claim 3, wherein Pile composition, characterized in that the colored shrinkage fibers have a shrinkage of at least 15%. The method of claim 3, wherein Pile composition, characterized in that the colored shrinkage fibers are from 1 to 10 denier (denier) fibers. The method of claim 3, wherein A pile composition, wherein the colored shrinkable fibers are fibers having a coefficient of static friction between fibers and fibers of 0.230 or less. The method of claim 3, wherein A pile composition, wherein the colored shrinkable fibers are undiluted colored fibers. The method of claim 7, wherein A pile composition, wherein the colored shrinkable fibers are colored by dyes or pigments or a combination of dyes and pigments. The method according to claim 3 to 8, A pile composition, wherein the colored shrinkable fibers are acrylic synthetic fibers. The method of claim 3, wherein Pile composition, characterized in that the non-shrinkable fibers are fibers of 3 to 40 denier. The method of claim 3 or 10, A pile composition wherein the non-shrinkable fiber is a fiber having a flat or oval cross section.