JPS6342936A - Yarn dyed knitted fabric of bulky spun yarn - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a soft-touch yarn-dyed woven or knitted fabric made of It fi bulky spun yarn, so-called non-twisted yarn.

(Kuh) Conventional technology Spun yarn maintains its shape and strength by twisting short fiber bundles and the entanglements generated by filament migration and the frictional force generated by the lateral pressure caused by the twisting. Therefore, it was thought that cloth foil made from spun yarn would be extremely weak if the spun yarn was not twisted. However, in recent years, fiber bundles and hardened spun yarns have been made by glueing, and the properties of these fibers when the adhesive is removed after the fabric is made are becoming known. According to the results, fabric foil made of untwisted spun yarn is stronger than expected and has a strength not much different from fabric fabric made of ordinary spun yarn, has low air permeability and water permeability, and has a heavy density. High-density woven fabrics made of untwisted spun yarn from which the adhesive has been removed are more likely to change in texture than normal spun yarn woven fabrics, whereas woven fabrics and knitted fabrics with low tension are significantly softer and have a lower density. The softness of twisted yarns is not due to the weak binding force between the fibers, which results in no resistance to elongation, shearing, or bending, but rather due to the large gaps between the fibers, which reduces compression resistance, resulting in a poor texture. The reason seems to be that it becomes softer. Therefore, it is difficult to make a woven fabric similar to a low-density untwisted yarn m fabric from conventional spun yarn, and the same is thought to be true for knitted fabrics.

In response, proposals have been made to create a yarn similar to untwisted spun yarn from conventional spun yarn. It involves aligning the spun yarn with water-soluble vinylon yarn and twisting the spun yarn in the direction of untwisting.
In this method, spun yarn is made with very little twist and water-soluble vinylon yarn is wound around it, and after making cloth foil using that yarn, the water-soluble vinylon yarn is removed with hot water. However, it is extremely difficult to yarn-dye the twisted yarn produced by this method (1). This is because water-soluble vinylon is unstable, dissolves in an aqueous dye bath, and loses its water solubility when subjected to heat treatment during dry dyeing, making dissolution treatment in subsequent steps impossible. Also, removal of water-soluble vinylon with hot water produces polyvinyl alcohol (PVA), but PV
Since A has a strong affinity for various types of fibers, it is difficult to remove and requires a large amount of hot water.6 If washing with hot water is insufficient, the fabric will become hard due to adhesion between the fibers, and the desired texture will not be achieved. Furthermore, the disposal of large amounts of hot water containing PVA poses difficult environmental problems.

In addition, water-soluble vinylon expands and contracts significantly depending on the humidity in the air, and at the same time its Young's modulus changes significantly. Therefore, in the thread making process using water-soluble vinylon, various defects will occur unless the temperature HQ degree B1 is closely controlled. In addition, when thread steaming or heat treatment is applied to twisted cheese, it may become impossible to deflate or become difficult to dissolve in water.
In principle, such processes should be avoided, but in cases where synthetic fibers are mixed into the spun yarn, the yarn obtained by plying and twisting may exhibit strong torque properties, resulting in the formation of snarls, etc. There is a problem in that processability is significantly impaired.

(c) Problems to be solved by the invention The present invention solves the problem by using soluble Ja fibers, which was difficult to solve in the past.
This enables yarn dyeing of M-twisted yarn.

(d) Means for solving the problems The present invention provides alkali f! Spun yarn made of Jfa fiber,
Continuous yarns made of alkali-soluble polyester fibers are aligned and twisted in the direction in which the spun yarns are untwisted, and then the dyed twisted yarns are used to create textiles or 1! This yarn-dyed yarn-dyed product is a bulky spinning yarn-dyed product, which is characterized in that the woven or knitted fabric is made by dissolving and removing the easily alkali-soluble polyester fibers from the woven or knitted fabric using an alkaline solution.

In the present invention, a composite yarn made by twisting and twisting alkali-soluble polyester fibers may be used alone, but in order to achieve the effect of yarn dyeing, it may be mixed with the composite yarn dyed in various colors, or mixed with the composite yarn dyed in various colors. It is preferable to use a mixture of composite yarn and continuous yarn to form an uneven pattern due to color pattern or bulk.

The latent bulky composite yarn used in the present invention is made into a form in which easily alkali-soluble fibers are wound around short fiber bundles of poorly alkali-soluble fibers, and then dyed. 1, but when 2, which is easily soluble in alkali, 1i &I is removed, it swells up and changes to the most stable form according to the structure of the cloth or plied yarn.

At this time, if any twist remains in the remaining fiber bundle, the larger the twist coefficient, the smaller the degree of swelling. This swelling becomes less noticeable when the twist coefficient (wire number f formula) is larger than 20, so the less twist the short fiber bundles that remain after removing the undesirable alkali-soluble fibers, the greater the bulkiness. The twist that existed before the formation of the strand is not uniform, so even if the number of twists is 0, it is often not locally untwisted. In such cases, slight changes in the number of twists can cause noticeable A slight change in bulk may occur.In such cases, leaving a slight twist will result in a more uniform fabric.

In addition, in such cases, it is best to heat the yarn to the point where it is slightly over-twisted. Over-untwisted spun yarn tends to have greater torque than yarn with some twist remaining, and even though the twist remains, is preferable because it tends to be bulky.

As the slightly alkali-soluble fiber used in the spun yarn used in the present invention, cotton, hemp, rayon (especially polynosic), nylon, polyester (regular type), vinylon, acrylic, etc. can be used, and silk, η wool, and acetate can be used. Can not.

Alkali-friendly, soluble polyether! A-fibers include fibers whose main component is polyethylene terephthalate, which is copolymerized with 2 to 25 mol% of a compound having sulfonic acid groups and two or more ester-forming groups, or fibers with sulfonic acid groups and ester-forming groups. 2-5 mol% of a compound having two or more groups and 2 mol% or more of a dicarboxylic acid having no sulfonic acid group other than terephthalic acid, the main component is polyethylene terephthalate, and the content of ethylene terephthalate units is 70%. 1a fiber or molecule ff with a weight of % or more
1200-10.000 polyether or its derivative 5-2531r! % copolymerized fibers whose main component is polyethylene terephthalate or sulfone U
, the main component is polyethylene terephthalate, which is a copolymerization of 2 mol % or more of a compound having U and two or more ester-forming groups and 2 wt % or more of a polyether or a derivative thereof having a molecular weight of 200 to 10,000. , a fiber containing 70% by weight or more of ethylene terephthalate units, or a fiber having a sulfonic acid group and an ester-forming group f!
: Compound t having 2 or more 2-5 moles? 6. Molecular weight 2
Preferable fibers are those in which the main component is polyethylene terephthalate, which is copolymerized with 2 mol % or more of a glycol compound having a molecular weight of less than 0.00, and the content of 1-litre ethylene terephthalate is 70 mol % or more.

As a compound containing a sulfone M group and having two or more ester-forming groups, an alkali metal salt of sulfoiphthalate is preferred from the viewpoint of cost and reactivity, and a dicarboxylic acid that does not contain sulfonic acid groups other than terephthalic acid to be copolymerized. In terms of cost, inphthalic acid and adipic acid are preferred.

Polyethers or derivatives thereof having a molecular weight of 200 to 10,000 to be copolymerized include polyethylene glycol, polypropylene glycol, polytetramethylene glycol, random or block copolymers of polyethylene glycol and polypropylene glycol, and ester-forming groups at the ends thereof. is blocked by an ether bond, an imide bond, etc. so that one or more remains.

As the glycol compound having a molecular weight of less than 200 to be copolymerized, 1.2 propanediol, 1.3 propanediol, 1.3 butanediol, 1.4 butanediol, diethylene glycol, l-diethylene glycol, and neopentyl glycol are preferable in terms of cost. Considering the stability of the polymerization process, 1.4-butanediol and diethylene glycol are most preferred.

Alkali easily soluble polyester used in the present invention! The continuous filament of av& is iI! As a continuous yarn, any of multifilament, monofilament, spun yarn, or yarn obtained by slitting or splitting a film may be used, and it may be a yarn treated with IIN, which increases the alkali dissolution rate. In order to achieve this, it is preferable that the single fibers be thin, and it is preferable that the single fibers have an irregular cross section rather than a circular cross section.

In the present invention, the alkaline solution for dissolving the easily alkali-soluble polyester fiber has a concentration of 0.1 to 10%, and the solvent is water or a water-based solvent, or an alcohol or an alcohol-based solvent. In addition, various additives may be added if necessary.The appropriate treatment temperature is above 60°C and below the boiling point of the solvent, but in order to promote dissolution, the solvent is It is also possible to process at temperatures above the boiling point. Alkali easily soluble polyester cloth H1t
When dissolved in an alkaline solution, it may be completely dissolved, but
If necessary, a part of the alkali easily soluble polyester 41 ii may be left undissolved.

Example 1 2.5 mol% of sulfoisophthalate and 5 mol% of isophthalic acid were copolymerized.

Phenol, tetrachloroethane, etc. 1 Depending on the mixture 3
Copolymerized polyethylene terephthalate with an intrinsic viscosity of 0.49 measured at 0°C was melt-spun at 1300r+t/
I got it together in minutes. This fiber is stretched by a conventional method to 40
A multifilament of denier/24 filament was obtained.

This thread was twisted together with No. 16 combed cotton thread (twist count: 20t/summer nZ twist), and an S twist of 48-Ot/m was applied and wound up. The remaining twist was It-/in and the twist coefficient was 0.5. Reactive dyeing 1 by winding this composite yarn
1 (M 1kacion Red GS) 1%
olIf anhydrous sulfur salt 20 g/l Bath ratio 3o
:1 dye bath, dyed at 30°C for 30 minutes, added soda ash aqueous solution 8I (7% 0-f) and fixed for another 40 minutes, washed with water, soaped, and dried. This yarn-dyed composite yarn has a warp density of 32 threads/in, a weft density of 36 threads/in, and a weft thread density of 36 threads/in.
The fibers were woven by r% so that n was woven, and the alkali easily soluble polyester fibers were dissolved in the next process Flfl.

Sodium hydroxide 4% Ethylene glycol 1% Sodium terephthalate Saturated water Residual bath ratio 100:1. At a temperature of 98° C. and a treatment time of 30 minutes, the alkali easily soluble polyester fibers were completely dissolved and removed, and an m product consisting of very poorly twisted cotton yarn (non-twisted yarn) was obtained. The resulting fabric was extremely bulky, soft to the touch, and had about twice the water absorption capacity as before treatment.

Example 2 A mixture of phenol and tetrachloroethane copolymerized with 3 mol % of sulfoinphthalic acid and 4 mol % of diethylene glycol had an intrinsic viscosity of 0.0 as measured at 30°C.
46 copolymerized polyethylene terephthalate was melt spun and wound at 1400 m/min. Fiber 5: A fiber with a length of 75 denier/24 filaments was obtained using a conventional method.

This fiber and cotton No. 30 single yarn (twist number 680t/m,
While aligning the Z-twist, an S-twist of 650 t/m was applied and wound. This composite yarn was heated and treated with reactive uA material (Hi&mcion Blue RC) 0,5%ow.
f.

Soak in a dye bath with anhydrous porcelain 15g/Z and bath ratio 30:1.
and stained at 30°C for 20 minutes, followed by staining with a soda ash aqueous solution (
5″'≦owf) and fixed for another 30 minutes, washed with water, soaped, and dried.This yarn-dyed composite yarn had a warp density of 30 threads/2.5 cm and a weft density of 38 threads/2.5 cm.
After weaving, the alkali 5-soluble polyester was dissolved in the same alkaline treatment solution as in Example 1. Bath ratio 100:1 temperature + [98°C1 processing time 50
Alkali-soluble polyester fibers are completely dissolved in minutes.
An extremely bulky, soft-touch non-twisted fabric made of cotton pole-twisted yarn was obtained.

Implementation PA3 3 with an equal mixture of phenol and tetrachloroethane copolymerized with 10 mol% sodium sulfoisophthalate.
Copolyester polyesterrephthalate 1. having an intrinsic viscosity of 047 as measured at 0°C was melt spun and wound at 1300 m/min. This fiber was drawn by a conventional method to 40 denier/
A multifilament of 24 filaments was obtained.

This yarn and cotton No. 16 combed yarn (twist number 520t/m, Z
The material was twisted and wound with a sl of 480 t/m. This composite yarn is dyed with direct dye (Diree).
L Brown 3G > 1%Q-[, Jll water sulfur salt 10%our, bath ratio 20:l, put in a dye bath, 60°
It was dyed for 20 minutes, squeezed out, left to cool for a while, washed with water, dehydrated, and dried.

After knitting this yarn-dyed composite yarn using an 18-gauge circular knitting machine, the easily alkali-soluble polyester fiber was subjected to dissolution treatment using the same alkaline treatment solution as in Example 1. Bath ratio 1
00:1. At a temperature of 98° C. and a treatment time of 30 minutes, the easily alkali-soluble polyester fibers were completely dissolved and removed, and an extremely bulky knitted fabric made of very thinly twisted cotton yarn was obtained.

(f) Effects of the invention Due to the shedding of single fibers, the spun yarn of polar material twists cannot be used in a normal manner.
However, according to the method of the present invention, by twisting and twisting an alkali-soluble continuous yarn to an alkali '81 i8 spun yarn, it is possible to weave, knit, dye, etc. Dying became possible, making it possible to produce yarn-dyed fabrics and yarn-dyed knits.

#IAan of the present invention is extremely bulky, soft touch,
It has excellent water absorption and shows excellent performance when used in underwear, towels, etc.

Claims (1)

[Claims] A woven or knitted fabric is made by aligning a spun yarn made of poorly alkali-soluble fibers and a continuous yarn consisting of easily alkali-soluble polyester fibers, twisting them in the direction of untwisting the spun yarns, and then dyeing the twisted yarns. , a yarn-dyed woven or knitted fabric made of bulky spun yarn, characterized in that alkali easily soluble polyester fibers are dissolved and removed from the woven or knitted fabric using an alkaline solution.