JP2009114565A - Textile comprising acryl filament yarn having tint difference in dye affinity - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an acryl filament yarn capable of imparting clear splashed pattern-like appearance to a woven or knitted textile, and having alternate deeply dyeable parts and lightly dyeable parts in the longitudinal direction of the filament. <P>SOLUTION: The acryl filament yarn having the alternate deeply dyeable parts and lightly dyeable parts in the longitudinal direction of the filament is regulated as follows: (a) the length of the deeply dyeable part is 0.6-4 m; (b) the length of the lightly dyeable part is 0.1-2 m; (c) the ratio of the length of the longest deeply dyeable part to the length of the shortest deeply dyeable part is ≥2.0; (d) the ratio of the length of the longest lightly dyeable part to the length of the shortest lightly dyeable part is ≥2.0; and (e) the ratio of the average lengths represented by (average length of the deeply dyeable part)/(average length of the lightly dyeable part) is ≥2.0. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is an acrylic filament yarn having a dark dyeable portion and a lightly dyeable portion alternately in the longitudinal direction of the yarn, and after the yarn is made into a fabric, it is vivid due to the difference in dyeability when dyed. The present invention relates to a fabric including an acrylic filament yarn that exhibits a toned appearance.

Conventionally, two or more types of short fibers or filament yarns with different dyeing properties have been used as yarns that can give surface effects such as fine pattern with marbled tone or pattern with rough tone to woven or knitted fabric. Yarn, slab yarn in which short fibers are mixed intermittently, and the like have been used. However, these yarns are a mixture of two or more types of fibers having different dyeing properties, and work and management in actual production of yarns and knitted fabrics are very troublesome. Only limited things were made.
Therefore, many technologies (Patent Documents 1 and 2) for obtaining yarns having a difference in light and shade dyeability by stretching under specific stretching conditions particularly in polyester fibers have been disclosed, but these are due to thick spots. There is a problem of poor workability in the subsequent process, and a sufficient shading effect has not been obtained from the viewpoint of dyeability.

Moreover, although the raw yarn cheese wound up by the spin draw spinning method is relaxed, a technique (Patent Document 3) is disclosed that uses a difference in crystal structure (shrinkage rate difference) to give a difference in light and shade dyeing. In this method, periodicity is generated, and a natural spot (unevenness) cannot be obtained.
Furthermore, a technique (Patent Documents 4 and 5) is also developed and known in which an aqueous liquid is intermittently applied to a running yarn in a spinning process and then a heat treatment is performed to give a difference in dyeability from a difference in thermal history. However, it is necessary to prevent the production equipment from rusting by using the liquid, which is problematic in practice. Further, the yarn obtained by this method has a disadvantage that the undrawn thick fineness portion is brittle and easily breaks. Accordingly, there has been a strong demand for the development of an acrylic filament yarn having a difference in light and shade dyeing properties that can give a clear tone appearance to a woven or knitted fabric and having good processability.

JP 2003-20519 A JP 2004-270112 A JP-A-8-13243 JP-A-62-289630 JP 2002-38329 A

  An object of the present invention is to provide a fabric comprising acrylic filament yarns that can solve the problems in the prior art by using an acrylonitrile-based polymer that does not show clear crystallinity, and can express a clear tone appearance on the fabric. There is to do.

The gist of the present invention resides in a fabric including an acrylic filament yarn having a light and shade dyeability difference that satisfies the following requirements.
-Along with the longitudinal direction of the yarn, it has dark-dyeing parts and light-dyeing parts alternately.-The length of the deep-dyeing part is 0.6m to 4m.
・ The length of the lightly dyeable portion is 0.1 m to 2 m.
・ The ratio of the length of the longest dyeable part to the length of the shortest dyeable part is 2.0 times or more. ・ The ratio of the length of the longest dyeable part to the length of the shortest dyeable part. Is 2.0 times or more. The ratio of the average length represented by (average length of the highly dyeable portion) / (average length of the lightly dyeable portion) is 2.0 times or more. The color difference between the natural part and the lightly dyeable part is 8.0 or more in terms of the Y value.
The present invention also relates to an acrylic filament in which a spinning stock solution comprising an acrylic copolymer containing 80% by mass or more of an acrylonitrile unit and a solvent is discharged into a coagulation bath through an air layer and stretched in warm water. In the manufacturing method of No. 4, the manufacturing method of repeating contact / non-contact with the hot plate under the conditions satisfying the following (1) to (4).
(1) Contact time t ₁ (sec) with hot plate: 0.1 (m) / V _sp ≦ t ₁ ≦ 2 (m) / V _sp
(2) Non-contact time to heat plate t ₂ (sec): 0.6 (m) / V _sp ≦ t ₂ ≦ 4 (m) / V _sp
V _sp : Winding speed (m / sec)
(3) The ratio between the maximum value and minimum value of t ₁ is more than twice (4) The ratio between the maximum value and minimum value of t ₂ is more than twice

  According to the present invention, an acrylic filament that has a difference in light and shade dyeability along the longitudinal direction of the yarn and has a small thickness unevenness of the yarn, and exhibits a vivid tone pattern when dyed into a fabric. A fabric made of yarn can be provided.

  The acrylonitrile-based polymer in the present invention is a copolymer containing 50% by mass or more of acrylonitrile units and an unsaturated monomer copolymerizable therewith. When the content of the acrylonitrile unit in the copolymer is less than 50% by mass, not only the physical properties and thermal properties necessary as a fiber for clothing are lacking, but also the dyeing vividness and color development characteristic of acrylic fibers are reduced. Therefore, it is not preferable.

  Examples of unsaturated monomers that can be copolymerized with acrylonitrile include acrylic acid, methacrylic acid, and derivatives thereof, vinyl acetate, acrylamide, methacrylamide, vinyl chloride, vinylidene chloride, and depending on the purpose, sodium vinylbenzene sulfonate, Ionic unsaturated monomers such as sodium methallyl sulfonate and sodium acrylamidomethylpropane sulfonate can be used.

  The method for producing the acrylonitrile-based polymer may be appropriately selected according to the purpose and use, such as suspension polymerization, solution polymerization, and the molecular weight thereof is usually within the range used for the production of acrylic fibers, and is particularly limited. Although it is not a thing, it is preferable that it exists in the range of 100,000-1 million.

  The acrylic filament yarn of the present invention has a dark dyeable part and a light dyeable part alternately along the longitudinal direction, the length of the deep dyeable part is 0.6 m to 4 m, and the length of the light dyeable part is It needs to be in the range of 0.1 m to 2 m. By dyeing the fabric using the acrylic filament yarn of the present invention, the light-colored part can be lifted and a tone-like appearance can be expressed. When the length of the deeply dyeable part is less than 0.6 m or longer than 4 m, the appearance becomes monotonous, and the gradation appearance cannot be expressed. Similarly, the lightly dyeable part has a range of 0.1 m to 2 m. Even if it comes off, it is impossible to obtain a gradation appearance.

  Further, the acrylic filament yarn of the present invention has a length ratio represented by a ratio of the length of the longest dyeable portion / the length of the shortest dyeable portion, and the length of the longest lightly dyeable portion. / The length ratio expressed by the ratio of the length of the shortest lightly dyeable part needs to be 2.0 times or more. When the length ratio of each of the deeply dyeable part and the lightly dyeable part is less than 2.0 times, the appearance becomes monotonous and tends to have a periodic pattern.

  Furthermore, in the acrylic filament yarn of the present invention, the ratio of the average length represented by the ratio of the average length of the deeply dyeable portion and the average length of the lightly dyeable portion needs to be 2.0 times or more. . When the ratio of the length is less than 2.0 times, the ratio of the lightly dyeable portion on the fabric increases, and as a result, it becomes difficult to obtain a tone appearance. Therefore, it becomes possible to express a wide variety of patterns by randomly dispersing the length and the period of the lightly dyeable portion in particular.

  In addition, it is preferable that the position of the deep dyeing | staining part and light dyeing | staining part of all the filaments exists in the substantially same position from a viewpoint that the external appearance control in a fabric becomes easy for the acrylic filament thread | yarn of this invention.

  The dark dyeable part and the light dyeable part of the acrylic filament yarn of the present invention are determined by visual judgment of the difference in light and dark dyeing during the same bath dyeing. If the difference in Y value measured with a color difference meter is 8.0 or more, a clearer tone appearance can be obtained. However, in the case of dyeing with an ultra-light color (light gray, light beige, light blue, etc.), the color difference between the deeply dyeable part and the lightly dyeable part is difficult to express clearly. Therefore, in order to make the color difference more prominent, it is preferable to perform dyeing at a dye concentration of 0.15% or more.

  The acrylic filament yarn of the present invention can be obtained by subjecting an acrylic filament yarn obtained by spinning and stretching an acrylonitrile-based polymer to heat treatment in a non-uniform manner along the longitudinal direction of the yarn when subjected to relaxation heat treatment. By heat-treating non-uniformly, portions having different thermal histories exist alternately and repeatedly along the longitudinal direction of the yarn. Accordingly, the heat-relaxed portion becomes loose in the fiber internal structure and forms a deeply dyeable portion having a high dyeing speed with the dye. On the contrary, the part not heat-relaxed has a dense fiber internal structure and forms a lightly dyeable part having a slow dyeing speed with a dye.

  The method for producing the acrylic filament yarn of the present invention is not particularly limited as long as the object of the present invention can be achieved, and wet spinning, dry-wet spinning, dry spinning method and the like can be adopted. A wet spinning method or a dry wet spinning method is used.

  The solvent of the spinning dope used for producing the acrylic filament yarn is not particularly limited as long as it can dissolve the acrylonitrile-based polymer, and examples thereof include dimethylformamide, dimethylacetamide, dimethylsulfoxide and the like. Further, the solid content concentration of the acrylonitrile polymer in the spinning dope varies depending on the type of solvent, the degree of polymerization of the polymer, the composition ratio, etc., but when dimethylacetamide is used as the solvent, it is generally 20 to 28% by mass. If it is. If the solid content concentration is less than 20% by mass, the spinning property is remarkably deteriorated, and it is not preferable. On the other hand, if it exceeds 28% by mass, the stability with time of the spinning dope deteriorates and the spinning property is lowered.

  The spinning dope is led through a spinneret to a spinning coagulation bath mainly composed of a solvent of the spinning dope and water. The spinning coagulation bath conditions are not particularly limited. For example, when dimethylacetamide is used as the solvent, the spinning coagulation bath preferably has a temperature of 0 to 45 ° C. and a solvent concentration of 10 to 75%. The obtained coagulated yarn is taken up by a take-up roll, then washed in hot water at 50 ° C. to 100 ° C. until the solvent content in the fiber is 1% or less, and then 2 in hot water at 80 ° C. to 100 ° C. An oil agent is applied after wet heat stretching by 0. 0 times or more. Thereafter, it is dried at a temperature of 120 ° C. to 180 ° C., and if necessary, is subjected to dry heat drawing.

  The drawn yarn is subjected to relaxation heat treatment in order to impart handling properties and dyeability in the subsequent process, but the acrylic filament yarn of the present invention is intermittently non-uniform along the longitudinal direction of the yarn. Heat treatment is applied. As a result, heat treatment spots are formed in the length direction of the acrylic filament yarn, and the portion that has not been subjected to the mild heat treatment becomes the lightly dyeable portion and the portion that has undergone the mild heat treatment becomes the deeply dyeable portion.

  As a method of performing non-uniform heat treatment, for example, when relaxation heat treatment is performed using a hot plate, a traveling guide attached to the front of the hot plate or the rear of the hot plate makes the traveling yarn contact the hot plate with a non-uniform cycle. Examples include a method of repeating non-contact, and any method may be used as long as it is a method capable of performing non-uniform heat treatment, which is an object of the present invention. In addition, by randomly performing the non-uniform heat treatment frequency and length by, for example, computer control, the length and occurrence frequency of the lightly dyeable portion can be arbitrarily expressed, and a variety of patterns can be expressed.

  Hereinafter, the present invention will be described more specifically with examples, but these do not limit the present invention.

(Color difference evaluation method)
The color difference between the deeply dyeable part and the lightly dyeable part was expressed by a Y value measured by a method based on JIS Z-8722 using a colorimetric color difference meter (manufactured by Nippon Denshoku Co., Ltd.).
(Evaluation method of mottle)
A knitted fabric was prepared with a 20G cylinder knitting machine using acrylic filament yarn, dyed with a cationic dye, and then the texture was visually evaluated. Evaluations were given as “◯” for natural spots and excellent design, and “X” for spots with poor spots and uniform appearance.

(Examples 1-3), (Comparative Examples 1-3)
Acrylic polymer comprising 93% by mass of acrylonitrile unit, 6% by mass of vinyl acetate unit and 1% by mass of sodium styrenesulfonate unit and having an average molecular weight of 300,000 is dimethylacetamide (hereinafter referred to as DMAc) so as to have a solid content concentration of 26% by mass. A spinning dope was prepared by dissolving in (abbreviation). This spinning dope is heated to 60 ° C. and discharged from a nozzle having a pore diameter of 0.15 mm and a number of holes of 60 through an air layer into a coagulation bath having a temperature of 40 ° C. composed of 73% by mass of DMAc and 27% by mass of water to form fibers. did. At this time, the distance from the nozzle surface to the coagulation bath liquid surface was set to 15 mm.

The obtained coagulated yarn was taken up by a take-up roll at a speed of 0.88 m / sec, then washed with water, stretched 3.0 times in boiling water, dried, and further stretched 2.0 times in a dry heat state. Next, 10% relaxation heat treatment was performed on a hot plate at 250 ° C. At this time, the winding speed V _sp was 5 m / sec.

  When this 10% relaxation heat treatment is performed, the running yarn is intermittently contacted / non-contacted intermittently with a non-uniform period by a rotary movable guide, and then the average fineness is 170 dtex with a winder. Acrylic filament yarn was obtained. The period of contact / non-contact with the hot plate varies with the peripheral speed of the rotating guide, and varies in a random manner within a range of a rotation radius of 5 to 20 cm and a rotation speed of 60 to 240 rpm (Examples 1 to 1 in Table 1). 3, Comparative Examples 1 and 2) and the rotation guide were stopped, and one condition (Comparative Example 3) was always in contact with the hot plate.

The obtained raw yarn was dyed blue with a cationic dye (Cathilon Blue BRLH 0.17%, manufactured by Hodogaya Chemical Co., Ltd.), and the lengths of the dark color portion and the light color portion were measured. A knitted fabric was prepared using this raw yarn, and then dyed with a cationic dye (Astrazon Blue F2RL 0.175%, manufactured by DyStar), and the visual mottle evaluation was performed. After the evaluation, the yarn was unwound from the knitted fabric, and the Y values of the deeply dyeable portion and the lightly dyeable portion were measured.
The results obtained above are collectively shown in Table 1.

Claims (3)

A fabric made of an acrylic filament yarn having a difference in light and shade dyeing that satisfies the following requirements.
-Along with the longitudinal direction of the yarn, it has dark-dyeing parts and light-dyeing parts alternately.-The length of the deep-dyeing part is 0.6m to 4m.
・ The length of the lightly dyeable portion is 0.1 m to 2 m.
・ The ratio of the length of the longest dyeable part to the length of the shortest dyeable part is 2.0 times or more. ・ The ratio of the length of the longest dyeable part to the length of the shortest dyeable part. Is 2.0 times or more. The ratio of the average length represented by (average length of darkly dyeable part) / (average length of lightly dyeable part) is 2.0 times or more.   The fabric comprising an acrylic filament yarn according to claim 1, wherein the color difference between the deeply dyeable part and the lightly dyeable part is 8.0 or more in terms of Y value. In the method for producing an acrylic filament, a spinning stock solution comprising an acrylic copolymer containing 80% by mass or more of an acrylonitrile unit and a solvent is discharged into a coagulation bath through an air layer, and stretched in warm water. The manufacturing method which repeats contact / non-contact to a hot plate on the conditions satisfying (1) to (4).
(1) Contact time t ₁ (sec) with hot plate: 0.1 (m) / V _sp ≦ t ₁ ≦ 2 (m) / V _sp
(2) Non-contact time to heat plate t ₂ (sec): 0.6 (m) / V _sp ≦ t ₂ ≦ 4 (m) / V _sp
V _sp : Winding speed (m / sec)
(3) The ratio between the maximum value and minimum value of t ₁ is more than twice (4) The ratio between the maximum value and minimum value of t ₂ is more than twice