JPS6366348A - Production of hard twisted fabric - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a method for manufacturing highly twisted textiles.

(Prior Art) Conventionally, fragment looms (for example, four-tarjet looms,
When weaving a highly twisted fabric using a highly twisted yarn for the weft (air jet loom, rapier loom, etc.), the weft is cut at both ends of the woven fabric. A phenomenon of untwisting occurred in the selvedges, and the graining due to the untwisting force of the weft yarns was insufficient or did not occur. As a result, a difference in grain form occurred between the center part (ground part) and the edge part of the fabric.

This phenomenon is most noticeable in so-called high-grained crepe fabrics in which the weft has a single yarn denier of 200 dc or more and the number of twists is 2,0 OOT/M or more, and is one of the reasons why this type of fabric is not manufactured on piecemeal looms. .

Currently, there are two types of looms: shirttle looms and shirttleless looms.

゛In most shirttleless looms, the weft thread is cut at both QGa sections for each weft insertion, and unlike shirttleless looms, the continuous weft threads are not folded back at the selvedge part, so the selvedge structure is different. It is different from the one by Totle Room.
The ear structure of the shirtless room is a tissue with ears. For this reason, during the relaxing process of highly twisted fabrics that use highly twisted yarns in the wefts (i.e. continuous arc twisted fabrics), when the untwisting force of the weft yarns is developed, the untwisting force causes the yarns to rotate and untwist. This reduces the appearance of grain due to untwisting force. As a result, there is a difference in grain form between the ears and the base, with the beaten base being normal and both ears having low grain.

As a solution to this drawback, tuck-woven ears have been used in which the ears are folded back in a tuck-in manner.

Therefore, conventionally, weaving of continuous arc twist fabrics has been limited to [8N] using the shirt truloom or selvedge tuck-in method.

(Objective of the Invention) The object of the present invention is to solve the problems encountered when weaving continuous arc twist weaving using the above-mentioned innovative loom, and to solve the problems that occur when weaving continuous arc twist weaving using the above-mentioned innovative loom. The present invention provides a method for producing a highly twisted fabric that can obtain a uniform grain shape without any twisting.

(Structure of the Invention) The present invention provides a method for manufacturing a highly twisted fabric using highly twisted yarns as weft yarns, in which warp yarns forming a ground portion and a selvage portion have a difference in thermal contraction start temperature, and Heat contraction opening temperature pA of warp threads
A method for producing a highly twisted fabric, characterized in that the fabric is woven using a fragmentary loom using a fabric with a lower

To explain the present invention in more detail, the present invention uses highly twisted yarn as the weft. The highly twisted yarn may be one that develops grain in the relaxing process after weaving, and may be any known yarn that has been used conventionally. The method of the present invention is characterized by the warp used.

However, the warp yarns used in the present invention have different heat shrinkage start temperatures depending on whether they are used for the base or the selvage, and the warp used for the selvage has a different heat shrinkage start temperature. It is preferable that the heat shrinkage rate (for example, boiling water shrinkage rate) of the edge warp is higher than that of the base warp.

Furthermore, the selvedge warp yarns are twisted in the S direction and in the Z direction.
A preferable example is one having directional twist and in which the S-twisted yarn and the Z-twisted yarn are arranged every other or every plurality of yarns. Further, the S-twisted yarn and/or the Z-twisted yarn may be strongly twisted yarns, but the degree of strong twist of the selvedge warp yarns does not require any strong twist of the strongly twisted yarns used for the weft yarns.

As described above, the warp yarns used for the base and selvage portions have a characteristic of heat shrinkage properties, and therefore, those using thermoplastic synthetic fibers such as polyester and polyamide are effective examples.

The fragment loom used in the present invention refers to a weaving machine such as a water jet loom, an air jet loom, or a rapier loom, which cuts the weft yarn at the edge of the fabric selvage.

(Function of the Invention) Since the present invention has the above configuration, it is possible to prevent the highly twisted yarns of the weft from untwisting, and to make the occurrence of grains uniform between the ground portion and the selvedge portion.

In other words, by using a yarn with a low heat shrinkage start temperature for the selvedge warp, the selvedge yarn contracts and tightens the weft at the selvedge before the weft begins to untwist or before the warp ground begins to shrink. . Therefore, at the time when ribs are formed by untwisting the weft yarns or shrinking the warp yarns in the ground part of the fabric, the weft yarns in the selvage area are firmly tightened and gripped by the selvage warp yarns, and these behaviors are The weft yarns in the selvedges do not untwist as a result of the influence. Here, the higher the boiling water shrinkage rate of the selvage warp, the stronger the grip of the weft at the selvage.

Furthermore, by subjecting the warp of the selvedge to a strong twist, during untwisting, the warp and weft of the selvedge become intertwined and bitten by the respective untwisting actions of the selvedge warp and weft. As a result, rotation of the weft yarns is prevented and untwisting does not occur.

In general, both SJM and Z-twist yarn types are often used for the weft yarns of continuous arc-twisted fabrics. It is preferable to use different types of threads.

Hereinafter, specific examples of the present invention will be described.

(Example 1) A sized polyester long fiber yarn with a thickness of 80 de/48 fi l was used for the ground warp, and a wire count of 403 was used for the weft.
/2 polyester spun yarn, S and Z 2,80 each
When weaving a continuous arc twist fabric on a rapier loom using 0'F/H twisted yarn, the selvedge warp has a thickness of 170de/
Using 63 fil of S and Z strongly twisted yarns each twisted by 1,700'rmH, the fabric was woven with a structure in which 782 S and Z selvedge warps were alternately arranged. The heat shrinkage start temperature of the edge warp is 85°C1, and the boiling water shrinkage rate is 6%, and the heat shrinkage start temperature of the ground warp is 110'C1, and the boiling water shrinkage rate is 3%.
%Met. Note that the temperature at which the weft started to shrink due to heat was 90°C. When the fabric obtained above was subjected to a relaxing process, the fabric was completely and uniformly grained up to the edges.

On the other hand, for comparison, a fabric in which the selvedge warp was made of threads with the exact same thickness as the ground warp, 80 de/48 f i I, had wrinkles in a width of approximately 10 cm from both selvedges during the relaxing process. There wasn't.

(Example 2) Sized yarn of polyester long fiber weft with a thickness of toode/48fil was used for the ground warp, and the weft was sized 200d.
I! is a high-grain crepe fabric woven in a water jet loom using c/96fil polynisdel long fiber crimped yarn with a twist of 2,100'r/H for each of S and Z. When weaving A, some of the selvedge warp threads have a thickness of 30
(After twisting S and Z of 800 [/)l each of le/12fi1, this is made into a double yarn, and the S and Z are each twisted with GOOf/H in the opposite direction to the first twist. , 782 yarns were arranged alternately and a total of 8 yarns were used to construct the selvage base yarn and weaved it.

Here, the humidity at which the heat shrinkage of the selvedge warp starts is 80°C.

Its boiling water shrinkage rate was 15%, the heat shrinkage start humidity of the ground warp was 120°C, and its boiling water shrinkage rate was 3%. still,
The thermal contraction start temperature of the weft yarn was 105°C.

When the fabric was passed through a relaxing process, the fabric became 'f:
Complete and uniform graining was obtained up to E.

On the other hand, for comparison, the selvedge warp is the same thickness as the base warp.
The fabric made of 00de/48fil has a width of about 3 cm on one side and about 5 cm on the other side during the relaxing process, and the finished part has a lower grain than the ground part. Ta.

Claims (1)

[Scope of Claims] 1. In a method for producing a highly twisted fabric using highly twisted yarns as wefts, the warp forming the base and the selvage have a difference in thermal contraction start temperature, and the selvage warp A method for producing a highly twisted fabric, characterized in that the fabric is woven using a piece loom using a material having a lower heat shrinkage start temperature. 2. The method according to claim 1, wherein the boiling water shrinkage rate of the edge warp is greater than that of the ground warp. 3. The method according to claim 1 or 2, wherein the selvedge warp yarns are strongly twisted yarns in which S-twisted yarns and Z-twisted yarns are alternately arranged every other or every plurality of yarns.