JPS642697B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for producing raw silk twisted yarn with elasticity for use in knitted fabrics.

(Prior art and its problems) In order to manufacture knitted fabrics using raw silk in the field of Western clothing, yarn with high elasticity is required. It was considered impossible.

(Means for solving the problem) The present invention is made by intertwisting raw silk, which has been considered impossible to impart elasticity, with false twisted yarn (stretch yarn) made of synthetic fibers such as polyester. It has been discovered that a completely new stretchable raw silk twisted yarn can be made.

To explain the present invention in more detail, raw silk 1 and synthetic fiber polyester false twisted yarn (polyester stretch yarn) 2 are pre-twisted at a ratio of 7:3 to form a pre-twisted yarn 3. Specifically, raw silk 1
is 42 denyl x 8, and polyether false twisted yarn 2 is
Using 150 denier, 380 twists per meter are applied to form three first twist yarns 3, 3, and 3.

Three of these pre-twisted yarns 3, 3, 3 are twisted together and subjected to a twisting process (380 times/m) in the opposite direction to the above-mentioned first twist to form a twisted yarn 4, and this twisted yarn 4 is made into a skein shape. Scouring is performed using the heating pot 5.

This scouring dissolves the sericin that was attached to the raw silk, making the hard raw silk softer, and as a result, the elasticity of the polyester false twisted yarn affects the raw silk, causing it to shrink, resulting in an overall stretch stress. You can do tutiyaan.

Although the case where the false twisted yarn is polyester has been described, other synthetic fibers may be used.

Further, the number of twists in the first twisting process or the first twisting process can be changed as appropriate depending on the purpose of use, and it is better that the number of twists in the first twisting process is the same as or smaller than the number of twists in the first twisting process.

The yarn ratio of raw silk 1 and synthetic fiber false twisted yarn 2 is preferably within the range of 7:4 to 9:2;
If the ratio is too large, there will be a filler that impairs the feel of the raw silk, and if it is too small, there is a risk that the overall expansion and contraction will be insufficient, but the optimal yarn doubling ratio is about 7:3.

(Effects) As described above, the present invention combines raw silk and synthetic fiber false-twisted yarn, performs the first twisting process, and then twists the first twisted yarn.
A plurality of the plied yarns are combined and ply-twisted in the opposite direction to the ply-twisted yarns, and then the mixed yarn is scoured, which retains the texture of raw silk and stretches the entire yarn (this degree of stretch is similar to that of synthetic fiber false-twisted yarns). (This is the same as stretching and contracting), and since it is double twisted and a false twisted yarn is tied to each of the pre-twisted yarns, the entire twisted yarn stretches and contracts evenly, making it possible to maintain the appearance even when knitting a knitted fabric. Can be organized well.

[Brief explanation of drawings]

The figure is a process diagram of the method for manufacturing the raw silk twisted yarn of the present invention. 1 is raw silk, 2 is synthetic fiber false twisted yarn, 3 is first twisted yarn, and 4 is mixed twisted yarn.

Claims (1)

[Scope of Claims] 1. After the false twisted processed yarn of raw silk and synthetic fibers are combined and pre-twisted to form the pre-twisted yarn, a plurality of the pre-twisted yarns are combined and twisted in the opposite direction to the pre-twisted yarn. A method for producing a stretchable mixed raw silk yarn, which comprises twisting a twisted yarn that has been subjected to a ply-twisting process, and scouring the twisted yarn. 2 The ratio of synthetic fiber false twisted yarn to raw silk is 10
% to 40%, according to claim 1. 3. The method for producing a stretchable raw silk twisted yarn according to claim 1, wherein the synthetic fiber is polyester.