JPS6065143A - Production of twisted 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] The present invention relates to a method for producing twisted textiles.

Conventionally, so-called embossed fabrics have been produced using highly twisted yarns of regenerated cellulose fibers, but when producing highly embossed woven fabrics such as Chirimen-style, the fabric width fluctuates in the length direction of the woven fabric after embossment. , wrinkles at the border between the narrow and wide areas, so-called step wrinkles, and shading after dyeing, so-called wrapping, occurred, significantly reducing the product value.

The present inventor has repeatedly conducted detailed studies on such step wrinkles and wrapping. That is, the inventor of the present invention conducted various studies on the texture condition JPaPa and tried to solve the problem, but although there was a tendency to reduce the problem to some extent, no fundamental solution was reached. We also investigated the inner and outer layers of the twisted yarn cylinder package after the twist set, which is said to be a problem with thermoplastic synthetic fibers, but the results were similar. Who is the inventor?
We reviewed all production processes and conditions in order to find a fundamental solution to the issues that arise, and we also examined in detail how to deal with the areas where packaging and stage wrinkles occur. As a result of these detailed studies, we found that there is a strong correlation between the places where wrapping and step wrinkles occur and pipe changes occur when weaving is carried out on a shuttle loom.

As a result of further studies based on the knowledge, it was determined that the twisting conditions, particularly the twisting tension fluctuations, were the cause of the wrapping and step wrinkles, and the present invention was achieved.

That is, when producing a regenerated cellulose fiber twisted fabric having the ability to develop grain, the present invention has a twist tension variation of 0.0.
This is a method for producing a twisted fabric characterized by using regenerated cellulose fiber yarn twisted within 77/d.

The present invention will be explained in detail below.

Regenerated cellulose fiber refers to cuproammonium rayon, viscose rayon, and polynosic rayon.

Twisted fabrics that have the ability to develop grain are made by weaving yarns that have twisting ability (torque) in the circumferential direction of the yarn axis by applying strain through twisting, and then developing the ability to twist through the use of water and physical kneading effects. A textile that can have an uneven effect on its surface. It usually refers to a product woven with a twist coefficient of 11,000 to 28,000, a plain, satin, or satin texture, and a fabric density (total density of vertical and horizontal lines) of 140 to 330 fibers/inch. Here, the twist coefficient is expressed as Tf, where the number of twists is T (twices/m) and the fineness (denier) of the yarn.

In the present invention, the twisting tension fluctuation is within 0.07 Vd, preferably o, o5 as the yarn constituting such a twisted fabric.
It is necessary to use yarn twisted at y/ct, 0.07
If the twisting tension fluctuates beyond t/d, the unloading and step wrinkles will not be eliminated. Methods to reduce the twisting tension fluctuation to within 0.07 fl d include, for example, making the flyer end of the Italian yarn twisting machine thinner or lowering the spindle rotation speed, but the most effective method is to lower the spindle rotation speed. be.

Specifically, the 850 to 9000r group is 6000rp.
This is achieved by lowering mK.

The tension level should be within a range that does not cause cracking, and the average value is Q, 05 to 0.15 Vd.
You can select the appropriate location.

Example cupro ammonium rayon filament yarn 120d
/70f 8-2500T/M and Z-250077M
O) The twisted yarn was twisted using an Italian twisting machine under the conditions shown in Table 1, and set at 75° C. for 30 minutes. Using this thread, the weft has a warp density of 89 threads/inch with a weft of 822
A fabric with a weft density of 72 threads/inch was woven.

Subsequently, it was embossed using a rotary washer at 30° C. for 45 minutes, and then dyed using a conventional dyeing machine.

Table 1 shows the occurrence of unused and wrinkled defects in the obtained products.

In addition, the appearance of non-use and step wrinkles is inspected using a conventional fabric inspection machine, and penalties are assigned for defects. That is, the weight (degree) of the defect is Wo; 0 points, W; 1 point, W!; 3 points, W
, ; Score as 6 points. Therefore, the lower the score, the better.

, 1-1 table Sugar applicant: Asahi Kasei Corporation

Claims (1)

[Claims] A method for producing a twisted fabric, characterized by using regenerated cellulose fiber yarn twisted within a twisting tension variation of 0.07 Vd when producing a twisted fabric with regenerated cellulose fibers having the ability to develop grain.