KR20190000291A - Flat acrylonitrile fiber having three dimensional crimp and pile cloth using the fiber - Google Patents

Abstract

Conventionally, shrinkable fiber is used as down hair to support a lower part of guard hair so as to be formed in a pile with excellent erectable properties. However, such method has a problem of insufficient lower support of the guard hair by the down hair, and also has a problem of losing a lot of hairs when tactile sensation is considered. To this end, according to the present invention, an objective of the present invention is to provide a flat acrylonitrile-based fiber capable of providing an excellent lower support effect of the guard hair even after a dyeing process and preventing a loss of the hair; and a pile fabric using the same. According to the present invention, the flat acrylonitrile-based fiber includes two acrylonitrile-based polymer components with a different acrylonitrile content ratio and has a cross section of a flat shape. The two acrylonitrile-based polymer components have a side-by-side or random structure.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a flat acrylonitrile-based fiber having a three-dimensional crimp and a fiber fabric using the fiber. BACKGROUND OF THE INVENTION < RTI ID = 0.0 >

The present technology utilizes the crimp of the down hair sufficiently to support the guard hair at the bottom, and when the pile fabric is made into a pile fabric, the appearance such as graininess is excellent and the softness can be reproduced more realistically. A flat acrylonitrile fiber capable of improving the yield of fiber, and a pile fabric using the fiber.

BACKGROUND ART [0002] Acrylonitrile-based synthetic fibers have heretofore been used in fields such as clothes and papers due to their excellent coloring property and texture. In particular, an acrylic file made up of two layers of down hair and guard hair can reproduce more realistic appearance such as animal hair such as mink and Fox. However, it is said that there is a problem in terms of grain growth. For example, in Patent Document 1, there is used a method in which non-shrinkable fibers and shrinkable fibers are mixed and shrinkage is expressed in the shrinkable fibers at the time of finishing. As a result, a clear step is developed in the down hair and the guard hair, and the guard hair is supported by the contracted down hair, making it possible to make a file having a mouth-like appearance close to the bristles.

Japanese Patent Laid-Open No. 2010-18910

However, since a pile is usually produced by using fibers after dyeing, for example, shrinkage fibers are shrunk during the dyeing process when high-temperature dyeing is performed in order to dye the paper in a dark state, . As a result, there is no clear step difference between the down hair and the guard hair of the produced pile fabric, and the lower supporting effect by the down hair is insufficient.

In addition, if the pile fabric for clothing is to have a soft texture, it is necessary to reduce the thickness of the pile fabric at the time of pile fabrication. In this case, the fibers are lost during pile fabrication, And there is a problem that the hair follicle dropping at the time of use increases.

The present invention has been made based on the above-described circumstances, and an object of the present invention is to provide a method for producing a pile fabric which is less likely to fall off when pile fabric is produced and which can exhibit appearance and softness such as good wear resistance regardless of high- And a pile fabric bag containing the same.

As a result of intensive studies on the above problems, the inventors of the present invention have found that by using a flat acrylonitrile-based fiber having a flat fiber cross section and excellent three-dimensional crimp as a down hair constituting a pile fabric bag, It is possible to obtain a superior under-support effect of the guard hair by the down hair, and to suppress hair loss in the produced pile fabric, thereby achieving the above object. That is, the object of the present invention is achieved by the following means.

[1] An acrylonitrile-based fiber comprising two acrylonitrile-based polymer components having different acrylonitrile content ratios and having a flat cross-section, wherein the two acrylonitrile-based polymer components are side-by- Wherein the flattened acrylonitrile-based fiber has a structure of a flat acrylonitrile-based fiber.

[2] Flat acrylonitrile according to [1], characterized in that the Cf value calculated by the following formula 2 is 16 or more based on the number of crimp Cn and the crimp rate Ci obtained according to JISL1015: 2010 after no-load boiling water treatment Reel fiber.

(Equation 2)

Cf = Cn x (1-Ci / 100)

[3] A pile fabrics characterized in that at least 20% by weight or more of the fibers constituting the downhair are flat acrylonitrile fibers as described in [1] or [2].

[4] The file fabric according to [3], wherein at least 10% by weight or more of the fibers constituting the downhair are acrylonitrile-based fibers having a Cf value calculated by the formula (2)

According to the present invention, since the down hair is flattened and the crimp is sufficiently expressed, the down hairs are sufficiently intertwined with each other, so that the effect of suppressing hair fall of the pile fabric can be obtained and a superior supporting effect of the guard hair can be obtained It is possible to provide a pile fabric excellent in appearance and softness such as wear resistance and the like.

The flat acrylonitrile-based fibers of the present invention contain two acrylonitrile-based polymer components having different acrylonitrile content ratios. By employing such a two-component structure, it is possible to express a coil-shaped three-dimensional crimp in the fiber itself due to the difference in heat shrinkage ratio of the acrylonitrile-based polymer. As a result, since the guard hair is supported by the crimp of the fibers even after passing through the production process of the pile fabric which is likely to be shrunk, the pile fabric obtained by using the pile fabric is excellent in appearance such as graininess.

As the two-component structure described above, there can be mentioned a side-by-side structure in which two acrylonitrile-based polymer components are two-layered with each other, or a random structure in which the number of layers is different depending on each short fiber. With such a two-component structure, it becomes possible to express the three-dimensional crimp in the fiber by the difference in the difference in the heat shrinkage percentage of the constituent components. Of these two types of structures, the side-by-side structure is preferable in that three-dimensional crimp can be more easily expressed.

The flat acrylonitrile-based fiber of the present invention has a flat cross-sectional shape of the fiber. By this shape, the cross-sectional secondary martens of the fibers are lowered, and therefore, the crimp caused by the difference in the heat shrinkage ratio of the polymer constituting the fiber tends to be expressed. As a result, mutual entanglement of the fibers becomes stronger, so that the effect of suppressing hair dropping can be obtained when pile fabrics are produced, and in addition, a pile having excellent appearance and softness can be obtained.

The flat acrylonitrile fiber of the present invention preferably has a Cf value as described above of preferably at least 16, more preferably at least 18, and even more preferably at least 20. Here, the Cf value represents the number of the crimps per inch of the fiber when the fiber is increased at a specific ratio. If the Cf value is high, it can be said that sufficient crimp remains in the fibers even after the fibers are stretched. If the Cf value is 16 or more, the crimp can be maintained even after passing through the file processing step, and a good appearance can be obtained by pile fabrication, and improvement in quality can be expected. On the other hand, in the case of less than 16, the crimp is stretched during the pile processing step, and the appearance such as the desired graininess may not be obtained in some cases.

The acrylonitrile-based polymer constituting the flat acrylonitrile-based fiber of the present invention may be a copolymer of acrylonitrile and another vinyl-based monomer, and the content of acrylonitrile as the monomer composition is preferably 40% Or more, more preferably 70 wt% or more, and further preferably 80 wt% or more. When the content of acrylonitrile is less than 40% by weight, sufficient fiber strength may not be obtained when the fiber is used. In addition, the acrylonitrile content ratio of the high shrinkage component in the two acrylonitrile-based polymer components is preferably less than 90% by weight because it is easy to obtain excellent three-dimensional crimp.

As the two acrylonitrile polymer components having different acrylonitrile content ratios employed in the present invention, the acrylonitrile content is preferably 1.0% by weight or more, more preferably 1.5% by weight or more. As a result, the three-dimensional crimp due to the difference in the heat shrinkage ratio due to the difference in the content ratio of acrylonitrile can be sufficiently expressed, and the appearance such as good embroiderability can be obtained when pile fabric is produced. On the other hand, when the difference in acrylonitrile content ratio is less than 1.0% by weight, the difference in heat shrinkage ratio between the two acrylonitrile polymers becomes small, so that the desired crimp can not be obtained and the appearance of appearance such as napping .

Other vinyl monomers that can be copolymerized with acrylonitrile are not particularly limited, but acrylic acid, methacrylic acid, or their esters; Acrylamide, methacrylamide or their N-alkyl substituents; Vinyl esters such as vinyl acetate; Halogenated vinyl or vinylidene halides such as vinyl chloride, vinyl bromide, and vinylidene chloride; Unsaturated sulfonic acids such as vinylsulfonic acid, allylsulfonic acid, methallylsulfonic acid, and p-styrenesulfonic acid, and salts thereof. The acrylonitrile-based polymer may be used as a constituent component insofar as the above-mentioned composition is satisfied.

The flat acrylonitrile fiber of the present invention preferably has a lower limit of the flatness calculated by dividing the major axis length of the cross section by the minor axis length of 1.5 or more, more preferably 1.7 or more. The upper limit is preferably 10 or less, more preferably 7 or less, and still more preferably 4 or less. By making this value fall within this range, a pile fabric having excellent appearance and softness can be obtained.

The flatness of the flat acrylonitrile-based fibers of the present invention is preferably 0.5 to 20 dtex, more preferably 1.0 to 15 dtex, and even more preferably 1.0 to 8 dtex. When the fineness is less than 0.5 dtex, the fiber is excessively thin, and the feeling of focusing becomes strong, thereby deteriorating the appearance. If it exceeds 20 dtex, the appearance and softness as a pile fabric can be deteriorated because the fiber is excessively thick.

The method for synthesizing the acrylonitrile-based polymer constituting the flat acrylonitrile-based fiber of the present invention described above is not particularly limited, and any known polymerization means such as suspension polymerization method, emulsion polymerization method, solution polymerization method and the like can be used .

The method for producing the flat acrylonitrile-based fiber of the present invention by using the obtained polymer is not particularly limited, but for example, in the case of producing by using the wet spinning method, The two acrylonitrile polymers having different acrylonitrile content ratios are dissolved in a solvent to prepare a stock solution (high acrylonitrile-containing polymer stock solution (A) and low acrylonitrile-containing polymer stock solution (B) do).

Examples of the solvent for dissolving the acrylonitrile-based polymer include organic solvents such as dimethylformamide, dimethylacetamide, dimethylsulfoxide and acetone, inorganic solvents such as nitric acid, zinc chloride aqueous solution and sodium thiocyanate aqueous solution. have.

The prepared two spinning solutions A and B were prepared by mixing A and B in a weight ratio of A / B = 20/80 to 80/20, using a composite spinning device as disclosed in Japanese Patent Publication No. 39-24301 The side-by-side type fiber can be produced by extruding it into a composite spinneret at a ratio of 1: 1, followed by extrusion into a coagulating bath, followed by washing with water, stretching, densification drying, moist heat treatment, emulsion treatment and crimp treatment. It is also possible to make a random type by spinning a spinning stock solution which is randomly multi-layered by a mixer or the like, and it is possible to make a fiber having a desired flat shape by changing the nozzle hole type used or changing the discharge speed . At that time, by changing the weight ratio of A and B or the heat treatment temperature of the wet heat treatment, the Cf value can be arbitrarily set.

The method for producing pile fabric using the flat acrylonitrile-based fibers of the present invention can be produced by a conventionally known production method. The shape of the fiber at that time is not particularly limited, and it may be any of a sliver, a spun yarn, and a filament.

The pile fabrics of the present invention contain the flat acrylonitrile fibers of the present invention as downhairs. As the content, at least 20% by weight, preferably at least 30% by weight, of the flat acrylonitrile-based fibers of the present invention is contained as the fibers constituting the nap portion. If the proportion of the flat acrylonitrile-based fibers of the present invention is less than 20% by weight, the effect of crimp is not sufficiently obtained, and the appearance of the pile fabric becomes worse, and the quality is deteriorated.

In the pile fabrics of the present invention, it is preferable to use acrylonitrile fibers having a Cf value of less than 16, more preferably 10 or less, and even more preferably 8 or less. This makes it possible to sufficiently stretch the crimp of the acrylonitrile-based fiber having a Cf value of less than 16 in the pile processing step, and to exert an excellent appearance such as animal hair.

The amount of the acrylonitrile-based fiber having the Cf value of less than 16 described above is at least 10% by weight, preferably 15% by weight, of the fibers constituting the nap portion. When the acrylonitrile-based fiber having a Cf value of less than 16 is less than 10% by weight, excellent appearance such as animal hair may not be obtained.

The cross-sectional shape of the acrylonitrile-based fiber having the above-mentioned Cf value of less than 16 is not particularly limited, but a round shape, a flat shape, a triangular shape, a Y-shape, a cross-sectional shape and the like can be adopted. Among these, a flat shape is preferable because it provides an appearance with less sense of focus when a file is produced, and is more easily softened.

The fineness of the acrylonitrile fiber having a Cf value of less than 16 employed in the present invention is preferably 10 to 40 dtex, more preferably 17 to 30 dtex. If the fineness is too small to be less than 10 dtex, the appearance such as animal hair may be damaged. If it exceeds 40 dtex, the softness as a file may be deteriorated.

The above-mentioned filament cloth may be mixed with other fibers in addition to the flat acrylonitrile fibers of the present invention or the acrylonitrile fibers having a Cf value of less than 16.

The other fibers described above are not particularly limited, and rayon, nylon, polyester, cotton, acryl, or the like can be used. They are not limited to one type, and a plurality of types can be used.

The cross-sectional shape of the fiber is not particularly limited, and it may be round or non-circular, and flat, triangular, elliptical, Y-shaped, cross-shaped, and the like.

(Example)

EXAMPLES Hereinafter, the present invention will be described in detail by way of examples, but the present invention is not limited to the following examples. The parts and percentages in the examples are expressed on a mass basis unless otherwise specified. In addition, appearance and softness such as grain growth of the pile fabric described in the examples were measured by the following methods.

(1) Number of crimp Cn

Measured and calculated by JIS L1015.

(2) Crimp rate Ci

Measured and calculated by JIS L1015.

(3) Cf value

Based on the Cn and Ci calculated and calculated by JIS L1015, by the following formula (3).

(Equation 3)

Cf = Cn x (1-Ci / 100)

(4) Flatness

Take 150 ~ 200 staple fibers from the sample fibers and arrange them into the fibers. The cross section of the fiber was cut, and a cross-sectional photograph was taken using an optical microscope. The short diameter (A) and the long diameter (B) of 50 fibers were measured from the cross-sectional photograph and calculated by the flatness ratio (A) / (B).

(5) Appearance Evaluation of File Fabric

As for the file whorl produced, evaluation was made on the natural fox fur using the following four criteria based on the visual acuity.

◎ Almost equal to the appearance of natural Fox.

○ It is close to appearance of natural Fox.

△ It is somewhat less than the appearance of natural Fox.

× It falls sharply from the appearance of natural Fox.

(6) Evaluating softness of file copying

Regarding the fabric pile fabric produced, the natural fox fur was evaluated by the following three criteria by touch.

◎ Almost equal to the natural feeling of Fox.

○ It is close to soft feeling of natural Fox.

× It is lower than the soft feeling of natural fox.

(7) Hair dropping test of pile fabric

With respect to the feather attachment test method (QTEC95-1111) of the Japan Textile Product Quality Technology Center (QTEC) Test Method, the test method is the same, and the number of fibers attached to the cellophane tape is actually counted , And evaluation was made by comparing the numbers. Further, when measuring the number of fibers, the adhesive component of the cellophane tape is removed by applying a lubricant (TB1801B) manufactured by 3B Co., Ltd. to the cellophane tape, for example.

(Examples 1 to 4, Comparative Examples 1 and 2, Production Examples 1 and 2) Production of acrylonitrile-based fibers

88 parts by weight of acrylonitrile and 12 parts by weight of vinyl acetate as a high heat shrinkable component were subjected to suspension polymerization to prepare an acrylonitrile-based polymer A. [ 90 parts by weight of acrylonitrile and 10 parts by weight of methyl acrylate were subjected to suspension polymerization as a low heat shrinkable component to prepare an acrylonitrile-based polymer B.

10 parts of the acrylonitrile-based polymers A and B were dissolved in 90 parts of a 50% aqueous solution of sodium tripolyphosphate to prepare spinning stock solutions Ap and Bp. Using this spinning stock solution, for example, the composite spinning apparatus disclosed in Japanese Patent Publication No. 39-24301, Ap and Bp were led to a composite spinneret at a composition ratio shown in Table 1, and a 10% roto- Followed by stretching 10 times with boiling water, followed by drying with hot air at 115 DEG C and further heat treatment in a pressurized steam at 120 DEG C to obtain an acrylonitrile-based fiber. It is needless to say that the single component fiber can be produced by using a conventionally known production method of acrylonitrile. Acrylonitrile fibers a to h were prepared by adjusting the shapes of the islands and the cross sections by using the mixer, the type of spinneret or the difference in pore size used at this time. Detailed data of each fiber are shown in Table 1.

(Examples 5 to 9 and Comparative Examples 3 to 5)

The acrylonitrile fibers a to h were mixed in the ratios shown in Table 2 and sieved with an opening / carding machine. The sliver was weighed at a weight per unit area of 1100 g / m ² using a pile knitting machine, and then a release agent was applied to the back surface and dried to prepare a pile fabric.

The file fabric was steamed for 20 minutes to express sufficient crimp in the fibers, and then subjected to a polishing treatment at a temperature of 90 to 190 DEG C to produce pile fabric.

Table 2 shows the mixing ratios of the acrylonitrile fibers of the pile fabric produced as the respective examples and the comparative examples, the appearance of each pile fabric, and the evaluation results of the softness.

The pile fabrics of Examples 5 to 9 contained the flat acrylonitrile-based fibers of the present invention in the nape portion, so that the guard hair was supported at the bottom, thereby having good appearance and softness. On the other hand, in Comparative Example 3, an acrylonitrile-based fiber having a round cross-sectional shape was used, resulting in deterioration of appearance and softness. Further, in Comparative Example 4, since the acrylonitrile-based fiber composed of only one component of Ap was used, the lower support effect of the guard hair due to crimp was not obtained and the appearance of wear resistance and the like deteriorated. In Comparative Example 5, since the content of the flat acrylonitrile-based fibers of the present invention was as small as 15%, the lower supporting effect of the guard hair was not sufficiently obtained, and the appearance was deteriorated.

The hair pull-off test was carried out using the pile fabric of Example 7 and the pile fabric of Comparative Example 3 using the flat acrylonitrile fibers of the present invention. As a result, Comparative Example 3 in which conventional shrinkage fibers were used as the down hair, On the other hand, in Example 7 using the flat acrylonitrile-based fibers of the present invention, an average result was 68, and the number of hair breaks was reduced by about 30%. Therefore, by using the flat acrylonitrile-based fibers of the present invention as the down hair, it is considered that hair loss in the pile processing step can be suppressed, and the decrease in weight per unit area before and after the pile processing is reduced You can expect.

Claims (4)

Wherein the two acrylonitrile-based polymer components contain two acrylonitrile-based polymer components having different acrylonitrile content ratios, and the two acrylonitrile-based polymer components form a side-by-side or random structure Wherein the flattened acrylonitrile-based fiber is a flat acrylonitrile-based fiber. The flattened acrylonitrile-based fiber according to claim 1, wherein the Cf value calculated by the following formula (1) is 16 or more based on the number of crimp Cn and the crimp rate Ci obtained according to JISL1015: 2010 after the zero- .
(Equation 1)
Cf = Cn x (1-Ci / 100) Characterized in that at least 20% by weight or more of the fibers constituting the down hair are the flat acrylonitrile fibers according to the item 1 or 2. The filament fabric according to claim 3, wherein at least 10% by weight or more of the fibers constituting the down hair are acrylonitrile fibers having a Cf value calculated by the above formula (1)