JPH01292154A - Production of fabric - Google Patents

Abstract

PURPOSE:To obtain a fabric with soft and liveliness, giving natural curly effect, by shrinking a fabric with specific combined filament yarns accounting for more than half of its surface. CONSTITUTION:A fabric is prepared so that combined filament yarns made up of polyethylene terephthalate yarns A<1.0de in single fiber fineness and <=10% in boiling water shrinkage and ethylene terephthalate-isophthalate copolymer yarns B>=1de in single fiber fineness and 25-65% in boiling water shrinkage, containing 5-20mol% of isophthalic acid component (combined ratio A/B=1/1-4/1, pref. 2/1-3/1) account for >=50% of the total surface. This fabric is then shrinked as much as >=30% in the warp and/or weft direction(s), thereby developing the yarns A on the surface of the objective fabric.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for producing knitted fabrics for use in clothing, household goods, and various other uses.

Conventional knitted fabrics using yarns made of ultrafine fibers with a fineness of 0.5 denier or less are disclosed in, for example, JP-A-51-7517.
It is described in Publication No. 3, Publication of Utility Model Publication No. 60-21426, etc. These conventionally known knitted fabrics knitted with ultrafine fibers of 0.5 deniers or less and ordinary fibers are used for clothing and provide a soft texture and a moist, leather-like feel to the skin.

Problems to be Solved by the Invention However, in knitted fabrics using ultrafine fibers of 0.5 denier or less as described above, fabrics with tension and stiffness are advantageous, and fabrics with natural surface changes and loop fluff are difficult to obtain. is also unknown.

The present invention solves the above problems, and aims to provide a method for producing a knitted fabric that is soft to the touch, has elasticity, has elasticity, and exhibits a natural heathered effect.

Means for Solving the Problems In order to solve the above-mentioned problems, the method for manufacturing a knitted fabric of the present invention has a single fiber fineness of less than 1.0 denier and a hot water shrinkage rate of 10.
% or less and an ethylene terephthalate-isophthalate copolymer fiber yarn with a single fiber fineness of 1 denier or more, a hot water shrinkage rate of 25 to 65%, and an isophthalic acid component of 5 to 20 mol%. A knitted fabric is knitted using the obtained yarn so that the yarn occupies 50% or more of the surface.

It is then characterized in that it is shrunk by 30% or more in at least either the warp direction or the weft direction in a subsequent process.

In the present invention, polyethylene terephthalate fiber yarn (hereinafter referred to as yarn A) with a single fiber fineness of less than 1.0 denier and a hot water shrinkage rate of 10% or less, and a polyethylene terephthalate fiber yarn (hereinafter referred to as yarn A) with a single fiber fineness of 1 denier or more and a hot water shrinkage rate of 25% or less are used. It is possible to use a yarn (hereinafter referred to as mixed fiber yarn) in which ~65% isophthalic acid component is blended with ethylene terephthalate-isophthalate copolymer fiber yarn (hereinafter referred to as yarn B) containing 5 to 20 mol% of isophthalic acid component. By using a mixed yarn of yarn A having a single fiber fineness of less than 1.0 denier and yarn B having a single fiber fineness of 1 denier or more, it is possible to provide a soft feel, tension, and stiffness. That is,
With a single fiber fineness of 1.0 denier as the boundary, Yarn A of less than 1.0 denier gives the knitted fabric a soft feel, and
Yarn B, which has a denier or more, can give the knitted fabric tension and firmness, and by using a yarn that is a blend of yarn A and yarn B, a harmonious soft feel and tension can be achieved.
It is possible to obtain a knitted fabric with excellent elasticity, and when the fineness of all single fibers is 1.0 denier or more, it is difficult to obtain a soft feeling.
Furthermore, if all the knitted fabrics are less than 1 denier, it will not be possible to obtain a knitted fabric with tension and stiffness.

In addition, when the hot water shrinkage rate of the yarn A is 10% or less, the yarn A tends to appear on the surface of the knitted fabric, giving it a soft feel. The yarn A is difficult to appear on the surface of the fabric, resulting in poor softness. On the other hand, when the hot water shrinkage rate of the yarn B is 25 to 65%, the yarn A of the mixed yarns can be expressed on the surface of one knitted fabric. If the hot water shrinkage rate of yarn B is less than 25%, yarn A will hardly appear on the surface of the knitted fabric, and if the hot water shrinkage rate exceeds 65%, yarn A will protrude too much. At the same time, the shrinkage of the yarn B as a whole increases, and the fluctuation of the properties when dyeing the knitted fabric increases, making stable production impossible.

In the ethylene terephthalate-isophthalate copolymer fiber yarn of yarn B, if the isophthalic acid component is less than 5 mol%, the shrinkage force of the yarn is weak.

Even if it shrinks during water treatment at temperatures below 100°C in the post-process.

If the water temperature is further increased to 100° C. or higher, the knitted fabric will stretch and the threads A will no longer appear on the surface. Furthermore, if the isophthalic acid component exceeds 20 mol%, the strength of the yarn will be weak.
It cannot withstand use.

The mixing ratio of the yarn A and the yarn B may be set in the range of 1:1 to 4:1, but a mixing ratio of 2:1 to 3°:1 is particularly preferable. For example, the total fineness is 100 denier, yarn A is 65 to 75 denier and yarn B is 25 to 35 denier.
A denier range is preferable.

If you fall outside these ranges, the knitted fabric may be too soft.

When mixing yarn A and yarn B, which may become too stiff and the desired result cannot be obtained, the yarn A and yarn B, which have been spun separately, can be mixed together using the same draw weight. Yarn A is hot drawn so that the hot water shrinkage rate is 10% or less, and yarn B is cold stretched so that the hot water shrinkage rate is 25 to 65%, and then they are entangled with compressed air. This can be achieved by winding up. Alternatively, a high-density drawn yarn may be produced separately by a method of spinning using a two-component spinning device using the same nozzle, and then drawn and entangled in the same manner as above, or a mixture of yarn A and yarn B. Fiber/
The number of entanglements is 50 or more per m, preferably 70 to 90 per m. If the number of interlaces is too small, the threads A are too exposed on the surface of the knitted fabric, resulting in a sagging state, which tends to cause snagging.

The mixed fiber yarns of yarn A and yarn B can be used alone to knit a knitted fabric, or can be knitted together with other normal false twisted yarns, so that more than 50% of the surface of the knitted fabric is covered with the mixed fibers. It is knitted so that the threads dominate, which gives it a soft feel, tension, and elasticity. On the other hand, the number of mixed yarns occupying the surface of the knitted fabric is 5.
If it is less than 0%, characteristics such as soft feel, tension, and waist will not be exhibited.

Next, the knitted fabric is subjected to post-processes such as dyeing and finishing.
By shrinking the knitted fabric by 30% or more in at least either the warp direction or the weft direction, the threads A are effectively exposed on the surface of the knitted fabric, resulting in a soft texture, tension, and elasticity.

In the knitted fabric obtained in the present invention, yarn A and yarn B are mixed to form a loop, and in particular, yarn A covers the surface of the kneaded fabric, and fibers of 0.5 denier or less are extremely It exists in a state with many voids at very narrow intervals.

Therefore, the surface of the knitted fabric has a soft feel, and the knitted fabric structure is tightened and taut due to the heat contraction of the yarn B, and has extremely good stiffness. Furthermore, by selecting the dye in the dyeing process, a heather effect can be created on the surface of the knitted fabric based on the difference in the exhaustion rate of the disperse dye between yarn A and yarn B. The knitted fabric having the above characteristics is suitable as a knitted fabric for thick and thin clothing such as women's bottoms and sportswear, and can also be applied to various uses such as cleaner cloth and shoe store cloth.

In the present invention, the method for measuring the hot water shrinkage rate of yarn is as follows.

Fix one end of the thread, hang it from the other end with an initial load of 1/10 g/d of the thread, measure 500 points correctly, strike two points, take the initial load, and place it in boiling water for 30 minutes. After soaking, take it out, lightly drain the water with absorbent paper or cloth, let it air dry horizontally, apply the initial load again, measure the length nwn between the two points, and calculate the hot water shrinkage rate (%) using the following formula. calculate. The number of measurements is 10, and the average value is expressed.

Furthermore, the method for measuring the shrinkage rate of the knitted fabric during the dyeing process is as follows.

Before dyeing in the dyeing process, measure the density a (well/inch or course/inch) of the gray fabric, and the density b (well/inch or course/inch) of the knitted fabric after dyeing.
The shrinkage rate is measured using the following formula.

-a Shrinkage rate of knitted fabric (%) = -X100 Effect With the above configuration, polyethylene terephthalate fiber yarn with a single fiber fineness of less than 1.0 denier and a hot water shrinkage rate of 10% or less is effectively applied to the surface of the knitted fabric. The isophthalic acid component exists in a state with many voids at extremely narrow intervals, giving the surface an extremely soft feel, and has a single fiber fineness of 1 denier or more and a hot water shrinkage rate of 25 to 65%. ~20 mol% ethylene terephthalate-isophthalate copolymer fiber yarn is heat-shrinked, and the knitted fabric becomes tight and taut, giving rise to stiffness.

It is possible to obtain a knitted fabric that can be widely applied to various uses for clothing and non-clothing.

Examples Example 1 55 denier/168 filament (single fiber fineness 0.3
Polyethylene terephthalate fiber yarn (3 denier) with a hot water shrinkage rate of 6% and 25 denier/12 filament (
Ethylene terephthalate-isophthalate copolymer fiber yarn with a single fiber fineness of 2.08 denier and a hot water shrinkage rate of 38% and an isophthalic acid component of 8 mol% is interlaced with 75 pieces/
The mixed fiber yarn 1, which has been mixed with air so that The density of the obtained gray fabric was 35 wo/inch in the warp direction and 44 kos/inch in the weft direction.

This knitted fabric was dyed and finished using a normal dyeing and finishing process. The density of the finished knitted fabric is 52 wo/inch in the warp direction and 52 cos/inch in the weft direction, and the shrinkage rate is 48.6% in the warp direction.
, and 18.2% in the latitudinal direction. This finished knitted fabric is tensioned,
It has a firm and soft texture, and when used as an eyeglass cleaner, it was easy to wipe, and because the knitted fabric surface was covered with microfine fiber loops, it showed excellent performance in removing small dust.

Example 2 55 denier/168 filament (single fiber fineness 063
3 denier) with a hot water shrinkage rate of 5%, and 25 denier/8 filament (single fiber fineness 3.13 denier) with a hot water shrinkage rate of 60% and ethylene containing 6 mol% of isophthalic acid. Number of entanglements with terephthalate-isophthalate copolymer fiber yarn: 86 pieces/m
Using air mixed yarn 2 of 80 denier/176 filaments and polyethylene terephthalate false twisted yarn 3 of 75 denier/36 filaments,
Using the double knitting machine UL-4 type (33” x 22G) (manufactured by Fukuhara Seiki), the yarn feeders F1 to F
F2 out of 14. F3. F6. F7. F9. FIO,F
The mixed yarn 2 was fed to 13°F14, Fl, F4°F5. F8. False twisted strips 3 were supplied to FLI and F12 to knit a reversible knitted fabric. The density of the obtained gray fabric was 32 mm/inch in the warp direction and 55 mm/inch in the weft direction. This knitted fabric is relaxed and dyed using the usual dyeing method.
Scouring, presetting, and dyeing were performed. The density of the finished knitted fabric was 55 wo/inch in the warp direction and 60 kos/inch in the weft direction, and the shrinkage rate in the warp direction was 72%. This finished knitted fabric had a soft texture on the surface, had a wool-like tension, and had a waist, making it an excellent fabric for women's skirts.

Effects of the Invention The knitted fabric obtained by the method for producing a knitted fabric of the present invention is made of polyethylene terephthalate lI fiber (yarn A) having a single fiber fineness of less than 1.0 denier and a hot water shrinkage rate of 10% or less. It is looped in a state in which an isophthalic acid component having a fiber fineness of 1 denier or more and a hot water shrinkage rate of 25 to 65% is mixed with an ethylene terephthalate-isophthalate copolymer fiber yarn (yarn B) containing 5 to 20 mol%. In particular, yarn A is effectively displayed on the surface of the knitted fabric due to its low hot water shrinkage, and the fibers of less than 1.0 denier form many voids at extremely narrow intervals. The texture of the knitted fabric is tight and taut due to the heat shrinkage of yarn B, giving it excellent stiffness, and the selection of dyes gives it a natural heathered effect. It can be used in a wide range of applications as thick and thin clothing fabrics and non-clothing fabrics such as cleaner cloths and shoe base fabrics.

[Brief explanation of the drawing]

FIG. 1 is a knitting structure diagram of the knitted fabric according to the first embodiment of the present invention, and FIG. 2 is a knitting Mm diagram of the knitted fabric according to the second embodiment of the present invention. Agent Yoshihiro Morimoto Figure 1 Figure 2 Figure 1, Indication of the case Patent Application No. 116672 of 1988 2, Name of the invention Method for manufacturing knitted fabric 3, Person making the amendment Relationship to the case Name of patent applicant (450) Unitika Co., Ltd. 4, Agent 6, Number of inventions increased by amendment 7, Subject of amendment 1, Detailed explanation of the invention in the specification column (1) Page 6, line 4 “Highly oriented The term ``drawn yarn'' is corrected to ``highly oriented undrawn yarn.'' (2) Page 10, line 20, ``rUL-4 type'' is corrected to ``rLIL-4 type''. [3) Page 11, line 4, "False twisted thread 3J" is corrected to "False twisted thread 3."

Claims (1)

[Claims] 1. Single fiber fineness is less than 1.0 denier and hot water shrinkage rate is 1.
0% or less polyethylene terephthalate fiber yarn and an ethylene terephthalate-isophthalate copolymer fiber yarn with a single fiber fineness of 1 denier or more, a hot water shrinkage rate of 25 to 65%, and an isophthalic acid component of 5 to 20 mol%. A knitted fabric is knitted using the woven yarn so that the yarn occupies 50% or more of the surface, and then, in a subsequent step, it is shrunk by 30% or more in at least either the warp direction or the weft direction. A method for manufacturing knitted fabric.