JPS642695B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for producing crimped raw silk using resin processing.

Conventional technology Various methods for manufacturing curled raw silk have been studied in the past, and one of the representative methods is
Publication No. 47-14043 and Special Publication No. 14043-
The method described in Publication No. 39934 is known. However, since all of these methods are scoured to remove sericin and then crimped, conventional crimped raw silk (silk thread) is difficult to use in the production of post-sneaked fabrics, such as crepe. It was not practical, as it had problems with its texture and functionality.

OBJECTS OF THE INVENTION An object of the present invention is to provide a method for rationally producing raw silk with high elasticity and bulk by subjecting raw silk to crimping without removing sericin.

Structure of the Invention The method for producing crimped raw silk of the present invention involves resin-processing unscoured raw silk, and applying a resin treatment to
It is characterized by being twisted in a range of 4500 t/m, subjected to dry heat or wet heat treatment, then twisted back to become untwisted or overly twisted in a range of 300 t/m or less, made into a comb shape, and left to stand. .

The above-mentioned resin processing is generally carried out on raw silk in the state of skeins or weft laminations with a dilute solution or dispersion (solid content of about 1 to 7%, particularly preferably about 2 to 6%) of a usual resin finishing agent for fibers. It is carried out by immersing it in
As the resin finishing agent, it is preferable to use thermosetting resins such as melamine resin and urea resin.

The method of twisting the yarn after resin processing may be either a dry twisting method or a wet twisting method, but in the dry twisting method, the yarn cannot be twisted until it has been dried after resin processing, resulting in poor workability and Since it is possible to twist only up to a "twist constant", that is, the product of the square root of the fineness and the number of twists, of about 27,000, there is a limit to the thickness of the yarn that can be used, and it is difficult to obtain a sufficiently crimped raw silk. In contrast, with the wet twisting method, the yarn can be twisted immediately after resin processing using a wet twisting machine without drying, and it has a "more constant"
Since it can be twisted up to about 60,000 twists, it has the advantage of producing crimped raw silk with excellent elasticity and bulkiness, and a high elastic recovery rate.

The thus twisted yarn is then subjected to dry heat or wet heat treatment to fix the helical state of the yarn. The heat treatment conditions are about 100 to 140°C for about 20 to 40 minutes.

Thereafter, the heat-treated yarn can be left in an untwisted state or even
It is untwisted to an over-twisted state of 300t/m or less. For this untwisting or untwisting, an Italian twisting machine is generally used.

After untwisting, the raw silk is made into a skein by a skein machine and left to stand. A product with sufficient crimpability can be obtained by leaving the product naturally for 24 to 48 hours, but the time for the crimpability to stabilize may be accelerated by steaming or the like during the leaving.

The crimped raw silk obtained in this way has permanent elasticity, bulkiness, and crimping properties with excellent elasticity and resilience, and the original texture and quality of the raw silk are not impaired at all. was recognized.

Example: The raw silk 21 of the raw silk is reeled, five threads are tied together, wound around a weft matching frame, and 5% of melamine resin (Betsukamine PM-N manufactured by Dainippon Ink and Chemicals Co., Ltd.) is
It was immersed in the liquid for 30 minutes at room temperature. After that, the lower tube is immediately wound, and after being twisted with a wet twisting machine to a number of twists of 3300t/m, it is heat set at 130℃ for 30 minutes, and then it is untwisted to zero using a bobbin for an Italian twisting machine. After twisting it as shown, it was made into a skein shape using a skeiner and left to stand for 24 hours. As a result, the crimp ratio is 60
~125% stable crimped raw silk was obtained.

Effects of the Invention In the present invention, unrefined raw silk is subjected to a durable crimping process, so that the obtained crimped raw silk can be effectively used for making post-kneaded fabrics, such as picture wefts of crepe, and can be used for weaving. After that, by removing sericin, it is possible to produce a fabric that is extremely flexible, has excellent bulk, has excellent wrinkle resistance, and has a good texture. Furthermore, since most of the resin used in the resin processing is removed along with the sericin, a crimped yarn with dyeability and the like that is the same as that of ordinary silk yarn can be obtained.

Claims (1)

[Claims] 1. Unscoured raw silk is treated with resin and processed in the S direction or Z direction.
After twisting in the range of 1000 to 4500 t/m in the direction, after dry heat or wet heat treatment, untwist it or untwist it in the range of 300 t/m or less, then twist it into a comb shape.
A method for producing crimped raw silk characterized by leaving it to stand. 2. The method according to claim 1, wherein the resin used in the resin processing is a thermosetting resin.