JPH0223629B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for producing a crepe-like fabric made of synthetic fibers and having a good texture.

Prior Art Various methods for producing crepe fabrics using synthetic fibers, particularly polyester, have been studied in the past, but conventional methods that simply utilize the shrinkage force and untwisting torque of highly twisted yarns are difficult to form "wrinkles". It is difficult to obtain a sufficient number of highly twisted yarns, and when a heat setting method is used to prevent twisting of highly twisted yarns, the appearance of "wrinkles" becomes poor, and when chemical sizing agents are used, they are expensive. Furthermore, in order to develop sufficient grain, special equipment such as a rotary washer machine is required, making it impossible to use a continuous production method and resulting in poor workability. It was not possible to obtain a flexible product, only through erosion processing.

In addition, by using synthetic fibers as spun yarn, applying heat treatment to the spun yarn to fix the twist, attaching soluble yarn, and untwisting, the synergistic effect of the yarn form and torsional torque due to heat setting can be achieved. Although there are attempts to create grain (see Japanese Patent Publication No. 49-45742), the shape of the "grain" is determined by the twist of the spun yarn, so there is a limit to the size of the "grain" that can be obtained. Furthermore, it was not possible to use filament yarn, which is a common synthetic fiber.

Purpose of the Invention The present invention relates to a method for producing a crepe-like fabric with good workability and good texture using synthetic fibers, and in particular, a method for producing a fabric with a stable and uniform grain even when using filament yarn. The purpose is to provide a method that can be used.

Structure of the Invention The present invention is characterized in that thermoplastic synthetic fibers with a fineness of 50d to 500d are twisted into yarns in a range of 400t/m to 3000t/m.
Attaching thread soluble in solvent, 400t/m to 1500t/
The fabric is woven or knitted using wall threads that have been twisted back by m for at least part of the fabric, and the resulting fabric is heat set to a predetermined width, and then the soluble threads are dissolved and removed with a solvent.

The present invention is characterized by a circular spiral formed by the effects of the shrinkage force and untwisting torque of single-twisted strongly twisted yarn.
However, by heat-setting the fabric, the shape of this circular spiral is fixed, and then the soluble threads are dissolved and removed, resulting in very effective weight loss and a supple texture. A crepe is formed.

In the present invention, the pitch of the circular spiral is determined by the number of twists of the wall yarn, and the "grain"
The roughness and fineness of the shape can be adjusted. Also, the height of the grain changes depending on the fineness of the fiber used. Furthermore, if the number of first twists and the number of first twists are the same, a non-twisted product will be obtained and will be very flexible, but if the number of first twists is reduced and some twists are left, the product will be stiff. Therefore, the number of first twists and the number of first twists can be arbitrarily combined depending on the purpose.

As the synthetic fibers, any common thermoplastic fibers such as polyester, acrylic, and nylon can be used, but polyester is particularly preferred.

As the attached thread, either an organic solvent-soluble thread or a water-soluble thread may be used, but from the viewpoint of workability and safety, it is preferable to use a water-soluble thread. Note that the synthetic fiber may be subjected to a weight reduction treatment at the same time as the attached thread is dissolved and removed.

The wall yarns may be used alone, or in combination with ordinary synthetic fibers, or with other strong twist yarns, but in the case of textiles, it is preferable to use the wall yarns at least in the weft yarns. is preferable, and S strand and Z
It is best to alternately insert the twisted threads in an appropriate order.

Example S made by warping polyester 85d to 53 pieces/cm as warps, and twisting polyester bread 178d and polyester 50d to 1000t/m and 800t/m as wefts.
Water-soluble vinylon 30d was attached to the twisted yarn and Z-twisted yarn, and the yarns were twisted at 1000t/m and 800t/m, respectively, to make 1000t/mS twisted yarn, 800t/mS twisted yarn, and 1000t/mS twisted yarn.
A laid plain fabric was obtained by arranging the mZ twisted yarn and the 800t/mZ twisted yarn in this order.

After heat setting this to a specified width at 190℃,
Water-soluble vinylon was dissolved in boiling water.

The product is a crepe fabric with a very nice texture.

When the water-soluble vinylon was dissolved, it was treated with boiling water containing a 4-5% alkaline solution for 1.5 hours, and the weight of the polyester itself was reduced by about 15%, resulting in a product with even better texture.

Effects of the invention In the present invention, after twisting thermoplastic synthetic fibers,
A ``grain'' is formed by attaching a soluble yarn that is later dissolved and removed, and then using the twisted wall yarn to form a ``grain'' by heat setting and dissolving and removing the soluble yarn, resulting in a very stable and uniform ``grain''. By removing the formed and soluble threads, the wall threads become like non-twisted threads, and the weight reduction effect also extends to the inside of the thread structure, resulting in a crepe with a very good texture.

Claims (1)

[Claims] 1. Thermoplastic synthetic fibers with a fineness of 50d to 500d.
A solvent-soluble yarn is attached to the yarn twisted in the range of 400t/m to 3000t/m, and the yarn is twisted in the range of 400t/m to 1500t/m.
Weaving or knitting is performed using wall threads that have been twisted back in at least a part of the tissue, heat setting the obtained fabric to a predetermined width, and then dissolving and removing the above-mentioned soluble threads with a solvent. A method for producing crepe using synthetic fibers. 2. The method according to claim 1, wherein the synthetic fiber is polyester. 3. The method according to claim 1 or 2, characterized in that the fabric is woven using the wall yarn as at least the weft.