JPH0227460B2 - JUCHAKUATSUKONFUYOKAKOITOOYOBISONOSEIZOHOHO - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a textured yarn with fused impressions and a method for producing the same. More specifically, it is a multi-filament yarn consisting of a textured yarn with an uneven impression, in which at least some of the single fibers are fused or adhered, and the cross-sectional shape is flattened; It relates to its manufacturing method. Attempts have been made to give synthetic fiber filament knitted fabrics the feel and appearance of natural fibers, and many applied techniques using processed synthetic fiber yarns have also been developed. For example, one of these technologies is
As in Publication No. 50-35599, a multifilament made of synthetic fibers is defibrated, and the single fibers are pressure-processed so as to overlap each other, forming random groove-like traces on the single fibers to create a silk-like texture. There is a way to obtain this fiber. Furthermore, as disclosed in Japanese Patent Publication No. 51-225, a method has been proposed in which polyester synthetic fibers are false-twisted at high temperatures to form continuous untwisted yarns, resulting in fibers with high rigidity and smoothness. However, in the former method, the strength of the yarn decreases due to the indentation applied to the single fibers, and in the latter method, some or all of the fibers are fused, making the yarn rigid, resulting in poor texture when made into a fabric. becomes hard,
None of these methods are satisfactory as methods for obtaining high-quality fabrics. The present invention improves the drawbacks of these conventional techniques, and although it is a multi-filament fused yarn, it has soft and supple characteristics, a shiny feel, a special appearance, and high color development.
The object of the present invention is to obtain a high-quality woven or knitted fabric with excellent drapability. In addition, we can produce processed yarn with fused indentations with such characteristics with a simple device, with high efficiency.
This provides a new method that enables high-quality production. That is, the present invention provides a multi-filament yarn made of an indentation-finished yarn, in which at least some of the single fibers are fused or bonded, and the cross-sectional shape of the yarn and the cross-sectional shape of the single fibers are flat. A processed yarn with a fused indentation, and a thermoplastic synthetic multifilament yarn, which is relaxed and heat-treated, and at least some of the single fibers are fused or bonded, and then the filament yarn is processed along the yarn axis direction. This is a method for producing a processed yarn with fused impressions, characterized by press-welding. This will be explained using drawings. FIG. 1 is a photograph showing the surface state in which the single fibers of the indented processed yarn are fused or adhered. FIG. 2 is an enlarged version of the photograph in FIG. 1, and shows impressions caused by the interlacing of single fibers. FIG. 3 is a photograph showing the cross-sectional shape of the yarn, in which the single fibers are flattened and arranged in a roughly two-tiered arrangement, and the entire yarn is also flattened. Note that FIG. 4 shows the cross-sectional shape of the multifilament yarn used in the present invention. The material used in the present invention is a thermoplastic synthetic multifilament yarn, such as fibers such as polyamide, acrylic, and polyester. In view of the flattening or fusion of single fibers, the degree of adhesion, and the characteristics of the product, the cross-sectional shape is preferably a deformed shape such as a triangle or pentagon. Next, the manufacturing method will be explained. In the present invention, the first step is to fuse or adhere at least some of the single fibers of the multifilament yarn.
This is the point. Such a method involves relaxing the multifilament yarn and heat-treating it at a high temperature near the softening point to the melting point of the yarn to fuse some or most of the single fibers together. Any method may be used as long as it is a method of fusing or adhering. In the manufacturing method of the present invention, the second point is to press the multifilament yarn, in which at least some of the single fibers are fused or bonded by relaxation and heat treatment, along the yarn axis direction. . As a method for making such pressure contact, a hard pressure roller,
For example, the yarn may be pressed against the yarn using a pressure roller made of a resin such as phenol resin or a metal such as iron, or may be pressed against the yarn using a metal roller and a nip roller. In such a case, if the pressing force is too weak, the yarn will not be flattened, and if it is too strong, the single fibers will be strongly indented and the strength of the yarn will decrease, which is undesirable. In short, the pressure is preferably such that the yarn is flattened and uneven impressions are formed, but the pressure is such that it does not impart impressions that would reduce the strength of the single fibers. Furthermore, the yarn may be allowed to traverse within the pressure roller in order to prevent roller wear. In the method of the present invention, careful consideration must be taken not to destroy the flattened concavo-convex structure during winding. To specifically explain the manufacturing method of the present invention,
In FIG. 5, a thermoplastic synthetic fiber yarn 1 is fed to a feed roller 2, relaxed between it and a pressure roller 4, and simultaneously heat-treated by a heater 3. In the relaxation heat treatment, the relaxation rate for polyester, for example, is preferably 10% or more, more preferably 20% or more. The heat treatment temperature is also preferably in the range below the melting point to about 20°C lower than the melting point. Regarding pressurizing force
A practically preferred range is 0.5Kg/cm to 5Kg/cm. The fused and indented yarn obtained by the method of the present invention may then be subjected to tension treatment. By performing such treatment, some of the single fibers or multiple fibers in the fused portion are separated, and a desirable texture can be obtained. In other words, the integrated yarn becomes a yarn that has been opened to some extent, increasing its flexibility. In the method of the present invention, the yarns are pressed together by pressure treatment, so that the single fibers located in the second stage are arranged between the gaps between the single fiber groups arranged in the first stage, so that the single fibers are arranged in a two-stage manner. form a structure. As each single fiber becomes flattened, the shape of the single fiber group, that is, the bundle of multifilament yarns also becomes flattened. The single fibers of the second stage that do not intersect between the single fibers of the first stage intersect with each other, forming concave depressions at the points of intersection, resulting in impressions. The effects of the fused and indented processed yarn of the present invention are as follows. Due to the flattening of the yarn, the bending rigidity in one direction decreases, resulting in soft bending even though the yarn is fused and has a "sharpening" feel to the touch. In producing the processed yarn, the set temperature is high in the relaxed state, resulting in an extremely deep color when dyed, and the uneven impressions imparted to the surface cause diffused reflection, resulting in a unique depth of color. The texture of woven and knitted fabrics using the yarn of the present invention is "smooth".
It has good drapability and is suitable for thin fabrics, blouse fabrics, and women's spring/summer wear. Next, the method of the present invention will be explained in detail using examples. Example 1 100 made of polyethylene terephthalate fiber
Using a denier 48 filament triangular cross-section yarn, impression processing was performed under the following conditions to obtain a processed yarn with fused impressions. Processing speed: 200 m/min Relaxation rate: 25% Processing temperature: 240°C Pressure: 20 Kg/cm The processed yarn with fused impressions obtained under the above conditions was as shown in Figures 1 and 2. In addition, when the above-mentioned processed yarn with fused impressions was knitted with 28G cotton jersey, the result was a product that was silky, soft, highly colored, and rich in drapability. Table 1 shows the physical properties of the inventive examples and comparative examples. 【table】

[Brief explanation of drawings]

FIG. 1 shows the outer appearance of the textured yarn with fused impressions according to the present invention, and FIG. 2 shows an enlarged side view of FIG. 1. Third
The figure shows the cross-sectional shape of the present invention, and FIG. 4 shows the cross-sectional shape of the yarn used in the present invention. FIG. 5 shows the manufacturing process of the present invention.

Claims (1)

[Scope of Claims] 1. A multifilament yarn consisting of an indentation-finished yarn, in which at least some of the single fibers are fused or bonded, and the cross-sectional shape of the yarn and the cross-sectional shape of the single fibers are Processed yarn with fused impressions characterized by its flatness. 2. The fused and indented processed yarn according to claim 1, wherein the arrangement of the single fibers in the cross section is approximately in a two-tiered structure. 3 Relaxation of thermoplastic synthetic multifilament yarn,
1. A method for producing a processed yarn with fused impressions, which comprises heat-treating and fusing or adhering at least some of the single fibers, and then pressing the filament yarn along the yarn axis direction. 4. The method for producing a processed yarn with fused impressions according to claim 3, wherein the multifilament yarn is a yarn with a deformed cross section.