JPH0224939B2 - - Google Patents

Description

[Detailed description of the invention]

[Technical Field of the Invention] The present invention relates to a strong fiber yarn made of polyester filament yarn for use in knitting and fabrics, and more specifically, a plurality of yarns that have been subjected to sweet twisting are combined to form a strong fiber. The present invention relates to a method for producing knitted fabrics using this yarn. [Prior art and its problems] Various methods have been proposed for producing knitted fabrics containing strong cotton yarns made of polyester filament yarns, but none of them have achieved an elegant and uniform grain texture that rivals the natural fiber silk. The current situation is that it is not possible to obtain Special Publication No. 51-23619 as yarn for strong cotton,
As shown in Japanese Patent Publication No. 56-8140, by performing heat treatment at a high temperature after spinning and drawing, or by heat treatment at a high temperature during drawing, it is possible to increase the density of yarns higher than that of conventional yarns. Raw yarn for cotton wool has been proposed. However, although these proposed yarns are effective, it is difficult to significantly improve the conventional grain quality. On the other hand, as a conventional technique for high-grade processing, there is Japanese Patent Publication No. 57-8223. However, even with these known techniques, it is difficult to significantly improve the grain texture as in the case of yarns proposed as yarns for strong cotton fabric. [Object of the present invention] The present invention is intended to improve the drawbacks of the prior art, and to prevent migration of single fibers by combining a plurality of sweet twisted yarns and imparting strong yarn. By doing so, the purpose is to increase the torque of the strong flen yarn, cause uniform unraveling, improve the grain quality and graininess, and make the texture comparable to silk. [Structure of the present invention] The present invention consists of the following structure. “50t/m for polyester filament yarn
300t/m of sweet twist addition is applied, several of the yarns are put together, and a strong addition with a twist coefficient of K = 20000 or more is applied, then twist prevention is performed, after which a knitted fabric is formed and grain treatment is applied. A method for producing a knitted fabric containing strong cotton yarn. The polyester constituting the present invention contains 80 mol% or more of ethylene terephthalate units. Copolymerization components that can be used in this case include:
For example, adipic acid, sebacic acid, isophthalic acid,
Among dibasic acids such as 5-sodium sulfoisophthalic acid, diphenyldicarboxylic acid, and naphthalene dicarboxylic acid, oxyacids such as oxybenzoic acid, and glycols such as diethylene glycol, propylene glycol, neopentyl glycol, pentaerythritol, and polyethylene glycol. It is possible to use one or more of the following. The yarn to be supplied to Amagorioi-Nen is one obtained by normal spinning and drawing, and one obtained by ultra-high-speed spinning with a yarn density ρ of 1.365 g/cm ³ or more.
Yarns having a birefringence Δn of 0.140 or less can be used, and temporary twists of these yarns may also be used. [Operations and Effects of the Present Invention] The functions and effects of the present invention will be explained using a table. 1st
The table shows the relationship between the total number of sweet yarns and the state of grain formation. That is, three types of polyester filament yarns obtained under the conditions shown in Table 1 were used as weft yarns, and the warp yarns were polyester filament yarns 50D-36f consisting of filaments with a triangular cross section at 350 t/m.
The vertical density is 165 using yarn with a sweet twist.
A 1/2-inch beam was created, crepe was made, and the texture was applied.

[Table] As is clear from Table 1, the crepe that has been given a strong texture by combining the yarns that have been treated with sweet texture is
Although there is no difference in the wrinkle shrinkage rate, there is a large difference in the grain quality, horns and creases on the fabric surface, and the quality is good. This is because migration of single fibers and threads does not occur during the application of strong nen, and the dissolution of the strong nen occurs uniformly, resulting in an elegant grained crepe. In other words, since each single yarn has been given a sweet twist, its cohesiveness has been improved. Therefore, even if multiple loosely twisted yarns with improved cohesiveness are combined together and a strong layer is applied, it will not be possible to improve the cohesiveness due to the sweet twist. Due to the bundling property, the single fibers constituting a single yarn do not intersect with the single fibers constituting other single yarns, so migration between single yarns does not occur, and it is easy to twist. Since no migration occurs between the single fibers constituting a single yarn, it is possible to increase the torque of the strong yarn and to cause uniform disintegration. On the other hand, in the case of yarns in which strong fibers are added to a single yarn, uneven migration of the single fibers occurs, and this unevenness causes asymmetry in the decomposition of fibers, resulting in only poor quality yarns.

【table】

[Heat treatment crackness]

This is one method of measuring graininess, and the measurement method is as follows. In the center of 80cm of strong cotton thread
A load of 0.01 g/d was suspended, both ends were brought together in the center, the load was turned and a twist was added, and the sample was treated in hot water at 97℃ for 5 minutes, and the number of twists was measured (measured number of twists). Find it using the formula. Heat treatment strength = Measured number of twists x 2.5 x √2 D is denier Example 1 The warp yarn was made of polyethylene terephthalate filament with a deformed cross section of 50D-36f (triangular cross section).
After adding 300t/m and gluing the threads, a beam with a vertical density of 175 threads/inch was created, and then polyethylene terephthalate filament threads 30D-18f, 50D-24f, 75D-36f, 150D were used as weft threads. −
72f is combined with multiple threads that have been given a sweet twist as shown in Table 3, and then given a strong finish, and then placed in a vacuum setter.
Temporary fixation was performed at 85°C for 60 minutes. Crepe weaving was performed using this strong cotton yarn at a weft density of 68 threads/inch, and then graining was performed using a rotary washer. As is clear from the table, experiment No. 2 of the present invention ~
For samples other than No. 6 and 8 (No. 1, No. 7, and No. 9), although there was no significant difference in grain shrinkage, problems occurred with the grain texture, the edges of the fabric surface, and the texture.

【table】

[Table] As is clear from Table 3, Experiments Nos. 2 to 6 and 8 were within the range of the method of the present invention, so the grain shrinkage rate, grain texture, generation of horns, and texture were all favorable. Obtained. On the other hand, Experiment No. 1 had a low number of sweet yarns, Experiment No. 7 used a single yarn like the conventional example, and Experiment No. 9 had a low strong yarn coefficient, so all of them were satisfactory. No good results were obtained. Example 2 75D- polyester filament in warp yarn
200t/m additional reinforcement is applied to the 36f deformed cross-section yarn,
After gluing, a beam with a vertical density of 145 lines/inch was created. Next, the deformed cross-section of 75D-36f with a birefringence Δn of 0.103 was directly spun as a weft yarn, and additional yarn was added at a rate of 80 t/m, resulting in a total of 2200 t/m of three yarns.
The ancient crepe was applied with a strong cotton cloth and held at 85℃ for 60 minutes to prevent twisting, and the width density was 53 pieces/inch. The fabric was textured using a rotary washer. As a result, we were able to obtain something similar to ancient crepe, which had a grain shrinkage rate of 40.8% and was excellent in grain quality, quality, and texture. Example 3 Add 50D-18f to the warp yarn of Example 2 as the weft yarn.
The two-split yarn (50D-36F after splitting) was re-strengthened at a rate of 100t/m, and the four yarns were then subjected to a strong rendition of 2300t/m, and twisted for 60 minutes at 85°C, with a weft density of 56. I made crepe by weaving with a book. The fabric was embossed using a rotary washer. As a result, it was possible to obtain crepe with a grain shrinkage rate of 41.3% and excellent grain quality, quality, and texture.

Claims (1)

[Claims] 1 Polyester filament yarn from 50t/m
A soft twist addition of 300t/m is applied, several yarns are combined and a strong addition with a twist coefficient of K=20000 or more is applied, and then a twist prevention is performed, after which a knitted fabric is formed and a grain treatment is applied. A method for producing a knitted fabric containing strong cotton yarn. 2 Birefringence Δn of the raw polyester yarn is 0.14
A method for producing a knitted fabric containing strong cotton yarn according to claim 1, characterized in that the yarn density ρ is 1.365 g/cm ³ or more. 3. Claim 1, characterized in that the polyester yarn consists of two or more split conjugate yarns in which the single fiber fineness of the polyester yarn is 1.0 denier or more.
A method for producing a knitted fabric containing the strong cotton yarn described in 1.