JPS60126366A - Production of hard twisted yarn fabric - Google Patents

Abstract

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

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a raw yarn for strong cotton yarn machines made of polyethylene terephthalate yarn, and more specifically, it relates to a polyethylene terephthalate-coated yarn with one temporary twist. The present invention relates to a method for producing a strong cotton yarn fabric made of threads.

(Prior art and its problems) Conventionally, crepe fabrics such as deshin, palis, and crepe fabrics using temporary twist threads containing polyethylene terephthalate as the main component have been produced using a method of applying additional thread to the board twist, a method of performing preliminary twist of the first twist, and a method of performing temporary twist of the first twist. It was made using the method of performing Yori-kari-yori-oi-yori. The method of adding texture is
Schiff 1 <The quality is not satisfactory, and currently flat crepes are mainly produced. - The tentative twist at the tip of the force, the temporary twist at the tip and the trailing twist are grained (+5) (same level as silk, but there is a fatal problem in terms of texture.
Even in these technologies, it is said that silk is a dominant force, and it has not yet entered the crepe field. I haven't gotten much of anything.

[Object of the present invention]

The present invention improves the drawbacks of such prior art,
By significantly reducing the number of temporary twists compared to normal, the migration of single fibers is reduced, and by applying additional tightening to yarns that have a high torque after temporary twisting, the texture and texture are improved. It is said to be comparable to silk.

[Configuration of the present invention]

The present invention consists of the following configuration.

"Using a yarn made of polyester containing ethylene terephthalate as a main component, perform temporary twisting with a temporary twist coefficient of -22,000 or less to obtain a high-tightness tentatively twisted yarn having a twist degree of 2,500 or more after temporary twisting, Then the twist coefficient = 2
A method for producing a strong linen yarn fabric, which comprises applying a strong linen yarn having a strength of 0,000 or more, then preventing twisting to form a fabric, and subjecting it to a graining treatment. The polyester constituting the present invention contains 80 mol% or more of ethylene terephthalate units. Examples of copolymerization components include dibasic acids such as adipic acid, sebacic acid, isophthalic acid, 5-sodium sulfoisophthalic acid, diphenyldicarboxylic acid, and naphthalene dicarboxylic acid, oxyacids such as oxybenzoic acid, and diethylene glycol, propylene glycol, It is possible to use one or more types of glycols such as neopentyl glycol, pentaerythritol, and polyethylene glycol.

The yarns to be supplied to the temporary twist are yarns obtained by normal spinning and drawing, intermediately oriented undrawn yarns with a birefringence Δn of 0°020 or more obtained by high-speed spinning, and yarns with a yarn density ρ of 1 obtained by ultra-high-speed spinning. ．．
A yarn having a birefringence Δn of 378 g;/ff1 or more and a birefringence Δn of 0.135 or less is preferable, and a composite yarn consisting of two or more of these is more preferable.

Furthermore, the yarn of the present invention may be used in combination with other known yarns. In other words, the yarn of the present invention is used for at least one of the warp yarn and the weft yarn, or the yarn of the present invention is mixed and twisted with other yarns,
Alternatively, it may be a fabric in which warp threads or weft threads are inserted alternately or intermittently in at least one of the warp threads and weft threads.

[Actions and effects of the present invention]

The effects of the present invention will be explained using tables and figures. 1st
As is clear from the figure (temporary twist yarn of 1500-72f of polyethylene terephthalate), as the temporary twist coefficient increases, the degree of stiffness after temporary twist increases, and decreases past the peak.

This has a lot to do with migration during temporary twisting. In the present invention, when the tentative twist coefficient is equal to or less than 22,000,
Since migration due to temporary twisting does not occur sufficiently, torque remains, and the degree of twist after temporary twisting becomes 2500 or more. This degree of twist becomes a twist and remains in the temporary twist yarn. In addition, when the temporary twist coefficient is very small, no twist occurs in the temporary twist yarn, so the degree of frizz is not high. Therefore, it is necessary to simultaneously satisfy the range of the tentative twist coefficient and the degree of flatness.

In addition, the above-mentioned tentative twist yarn was treated with a strong yarn having a twist coefficient of 20,000, and the twist was fixed using a vacuum setter at 85° C. for 60 minutes.The heat treatment strength of the yarn is shown in FIG. Figure 2 shows the graining ability of the strong cotton yarn, and if the tentative twist coefficient in the present invention is '=22,000 or less, the heat treatment stiffness level is 8,000.
As above, it has a very high grain forming ability. These things are even clearer from Table 1.

Table 1 Note: O mark Good × mark Bad Table 1 consists of polyethylene terephthalate vertically 5
0D-48f yarn is coated with 400t/m,
A beam with a density of 160 pieces/inch was created, a 1500-72f temporary twist yarn made of polyethylene terephthalate was coated with 2350 t'/m of strong yarn, and the twist was stopped using a vacuum setter at 85°C for 60 minutes. A crepe was made by driving strong cotton fibers at a density of 68 threads/inch, and the fabric was embossed using a rotary 9 shear. Table 1 shows that when the tentative twist coefficient in the present invention is equal to or less than 22,000, no grain, horns, or cracks were observed after graining, and crepe with a uniform grain could be obtained. This is because the temporary twist coefficient is low, so migration of the yarn is difficult to occur, and it remains in the temporary twist yarn as a twist, and when applying strong nen, a uniform strong nen is applied to the twisted part, This is because during the graining process, uniform decomposition occurs in the fabric, resulting in a uniform grain texture.

When the tentative twist coefficient is higher than that of the present invention, migration of the yarn occurs sufficiently, resulting in a yarn with high bulk. This is because the distortion is absorbed by the bulky part of the yarn when applying strong yarn,
At the time of graining, unraveled grain does not appear, causing unevenness of unraveling and concentration of unraveling stress, and it is difficult to obtain a uniform grain texture even though the grain shrinkage rate is greater than that of the present invention. Horns and cracks often occur on the surface.

- If the raw yarn is not twisted by a force plate, it is difficult to apply the twist evenly when applying the strong linen, which leads to unevenness of the loosened linen and concentration of stress due to the loosened linen when creating the grain, resulting in a strong linen fabric with a satisfactory grain quality. I can't get it. In other words, it is difficult to remove high-quality strong linen fabrics using temporary twist yarns other than those of the present invention.

Next, the words and phrases of the present invention will be explained.

[Brittleness]

A load of 0.01 g/d was suspended at the center of a 3Qcm thread,
Put both ends together in the center, turn the load, add a twist, measure the number of twists based on the length, and calculate it using the following formula.

(Tightness - Measured Twistedness X2.5XQ) D is Denier (Heat Treated Twitness) The prototype for toughness measurement was further treated in hot water at 97°C for 5 minutes, and its twisted number was measured and calculated using the above formula.

Examples will be described below.

Example 1 The warp yarn was a polyester-based 500-36f deformed cross-section yarn containing polyethylene terephthalate as the main component.
After adding m, Gf with glue, 4 vertical density 16
Create a warp thread beam of 0/inch.

Next, for the horizontal light, polyester type 15 was used as well as the warp thread.
A tentative twist yarn shown in Table 2 was prepared from 0D-72f, a strong tension was applied, and the twist was stopped using a vacuum setter at 90° C. for 50 minutes. This strong cotton yarn is woven at a density of 70 threads/O] to create rarimen, and then textured with a rotary washer.

As is clear from Table 2, experiment N that is within the scope of the present invention
There was no significant difference in the shrinkage rate for grains other than o3 to 6.9, but problems with grain quality, corners on the fabric surface, and November problems occurred.

Table 2 Note) ○ mark Good △ mark Slightly stiff × mark Bad Example 2 150D-48f was used for the warp yarn of Example 1 for horizontal light.
(7) A temporary twist yarn was created from the 2-split yarn (150D'-96f after 11 minutes) with a temporary twist count of 15,000 and a stiffness degree of 4220 after temporary twist, and an additional twist of -28,000 was applied to the strength coefficient, and the vacuum Twisting was performed at 90° C. for 50 minutes. This strong cotton yarn was woven at a weft density of 72 threads/inch to create a crepe, and the same embossing treatment as in Example 1 was performed.

As a result, a crepe with a grain shrinkage rate of 41.3% and excellent grain texture and quality was obtained.

[Brief explanation of drawings]

FIG. 1 shows the relationship between the temporary twist coefficient and the degree of firmness after temporary twist, and the shaded area in the figure shows the temporary twist coefficient and the degree of firmness after temporary twist according to the present invention. Figure 2 is 23 to the temporary twist thread in Figure 1.
Apply 50t/m strong steel, vacuum setter 85℃ x 6
The relationship between the degree of heat treatment and the degree of firmness is shown when the twisting is stopped at 0 minutes. Patent applicant: Toshi Co., Ltd. 1st Nagidai, 2. figure

Claims (3)

[Claims] (1) Using yarn made of polyester whose main component is ethylene terephthalate, the tentative twist coefficient is 22,000.
Temporary twisting is performed as follows, and the twist after temporary twisting is made into a high-tightness temporary twisting yarn with a twist coefficient of 2500 or more. Next, a strong thread with a twisting coefficient of 20'000 or more is applied, and after that, the twisting is stopped. A method for producing a strong cotton yarn fabric, which is characterized by carrying out a woven fabric and a embossed process. (2) The method for producing a strong cotton yarn fabric according to claim (1), wherein the polyester yarn is composed of two or more split composite yarns each having a single fiber denier of 1.00 or more. (3) The method for producing a strong cotton yarn fabric according to claim (1), wherein the polyester yarn has a birefringence Δn of 0.14 or less.