JPS6257964A - Production fabric using twisted yarn - Google Patents

Abstract

(57) [Summary] 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 producing a twisted yarn fabric.

(Prior art) Conventionally, polyester multifilament yarns twisted at at least 500 T/M or more are usually set at 80 to 85°C to suppress the development of untwisting torque. there were.

On the other hand, the shape and texture of the fabric surface are characterized by
Yarn with a boiling water shrinkage rate of 30 inches or more and a thick part in the longitudinal direction of the yarn is used, but when the wire yarn is twisted and set with a normal twisting set, the shrinkage rate of the yarn is large. During setting, differences in shrinkage and denier strength and elongation are likely to occur due to uneven setting between the inner and outer layers of the twisted yarn cylinder, requiring care in handling the yarn, and fabric defects are likely to occur, resulting in a fully satisfactory twisted fabric. I couldn't do that. In addition, in order to eliminate this drawback, the residual shrinkage rate of the innermost layer where the yarn cannot shrink due to the cylinder wall is high, and in the thin denier part, the yarn is
To remove ~15F and compensate for the removal,
They dealt with it by rolling up cardboard boxes. However, it is not possible to completely eliminate the shrinkage difference between the inner and outer layers of the cylinder, and the difference in denier strength and elongation. The threads used for the fabric were divided into layers for each cylinder, but even this method often resulted in fabric defects such as wrapping, shrinkage, and uneven width. In this way, with the conventional method, there is a lot of twist loss, and it takes time and effort to separate the yarn into layers, making it extremely difficult to handle, and defects are likely to appear after weaving or processing. .

(Problems to be Solved by the Invention) The present invention reduces the shrinkage difference due to set unevenness and the denier strength/elongation difference, has no twist loss, is easy to handle,
The purpose of the present invention is to eliminate fabric processing defects such as wrapping, shrinkage, and unevenness in width, and to obtain a method for producing fabrics using twisted yarns that fully utilizes the characteristics unique to thick and thin yarns.

(Means for Solving the Problems) The present invention consists of twisting polyester multifilament yarns having thick sections in the longitudinal direction and having an average boiling water shrinkage rate of 30 to 60%, and This is a method for producing a twisted yarn fabric, in which twisted yarns that have been set at a temperature of

The polyester multifilament yarn in the present invention is one containing 85 or more ethylene terephthalate units, and includes copolymer components such as adipic acid,
Dibasic acids such as sebacic acid, isophthalic acid, Schifenyl dicarboxylic acid, and naphthalene dicarboxylic acid, oxyacids such as oxybenzoic acid, and glycols such as diethylene glycol, propylene glycol, neopentyl glycol, pentaerythritol, and polyethylene glycol monomethyl ether. , 5-nato-11um sulfoisophthalic acid, etc. One or more types can be used. The polyester constituting the yarn has a birefringence index of 15 x 10-” to 5 oxio-
" is an intermediately oriented undrawn yarn that is nonuniformly stretched to produce a yarn that has an uneven diameter distribution in the fiber axis direction and has an average submerged shrinkage of 30 inches or more. Here, the birefringence is 15 x 10". ””
If the birefringence is less than 50 x 10-', the fabric will deteriorate due to weight loss, and if the birefringence exceeds 50 x 10-', it will be difficult to develop thick and thin unevenness, and the shrinkage will be less than 30, making it difficult to create fabrics with the desired special surface effect. cannot be obtained. In addition, the diving contraction rate was
The purpose of using 0 threads or more is to obtain a special surface effect on the fabric by utilizing the bulkiness and irregularity of the yarn due to high shrinkage.If the submerged shrinkage rate is less than 30%, the above-mentioned surface effect cannot be obtained. No. In addition, when the diving shrinkage rate exceeds 60%, handling becomes poor, and the diving shrinkage rate is 30 to 6.
It is necessary to be 0chi.

Further, the cross-sectional shape of the filament is not particularly limited, and may have an irregular cross-section such as a circular, triangular, or multilobal cross-section. The denier of the yarn is not particularly limited, and may be within the range generally used for clothing, with a total denier of 3
0 to 300 y'-2-4 is preferred, and the single yarn denier is preferably 0.5 to 5 denier. Twisting may be carried out with a double twister or with an Itari set twister.

is less than 500T/M, usually do not set the twist stop,
Since sizing and setting are performed, the unevenness of twist set, which is a disadvantage of the present invention, does not occur. Twisting set temperature is 60
~75°C. By lowering the conventional one-stop setting temperature, the difference in shrinkage and denier strength and elongation due to uneven setting between the inner and outer layers can be reduced, eliminating fabric defects.

Even if the twist setting temperature is 60 to 75°C, the average boiling water shrinkage rate of the yarn is 30 to 60 φ, so it is possible to set the twist sufficiently, and the setting unevenness of the inner and outer layers of the cylinder (shrinkage difference due to C, denier strong elongation) It is also possible to reduce the temperature difference.If the twisting point temperature is less than 60℃, it will be difficult to control the temperature of the kya, and conversely, the uneven setting between the twisting cylinders will become large, and it will be difficult to ensure sufficient twisting. Unfavorable because it cannot be set.Twist setting temperature is 75℃
Exceeding this is not good because a difference in shrinkage and a difference in denier strength and elongation will occur between the inner and outer layers of the cylinder, resulting in fabric defects as in the conventional method. The preferred twist setting temperature is 65-70
It is ℃.

Weaving is carried out using the above-mentioned yarns for the warp and/or weft, but the weaving structure and weaving density may be conventionally known ones.
Further, the yarn (warp yarn or weft yarn) of the second thread 71 may be any yarn. Further, the textile finishing method may be a conventionally commonly used method.

(Example) Example 1 An undrawn polyethylene terephthalate yarn having a birefringence of 21.5 x 10= is drawn non-uniformly so that the birefringence plan in the thick part is 22 x 10-j% and the birefringence in the thin part is 1.
45 x 10 Ayu, Worcester Village (URN)
A thick yarn with a thick part in the longitudinal direction of a 75 denier 36 filament yarn with a thickness of 60% was produced.

A strong twist of 2500 T/M was applied to each wire yarn in the S direction. #The strong rind yarn was subjected to car set (twist set) at 70°C for 40 minutes.

Comparative Example 1 Highly twisted yarn similar to Example 1 was subjected to cassette treatment at 80° C. for 40 minutes.

Comparative Example 2 The same highly twisted yarn as in Comparative Example 1 was subjected to a car set at 55° C. for 40 minutes.

Example 2 Two thick and thin raw yarns similar to those in Example Row 1 were aligned, and 8
00 T/M application was performed. The twisted yarn is heated at 70°C x 40
I did a gear set (twisting set).

Comparative Example 3 The same twisted yarn as in Example 2 was subjected to a cassette set (twist fixing set) at 80° C. for 40 minutes.

Comparative Example 4 The same twisted yarn as in Example 2 was subjected to a cassette set (twist fixing set) at 55°C for 40 minutes.

Table 1 shows the yarn properties of the fL7 twisted yarns obtained in Examples 1 to 2 and Comparative Examples 1 to 4.

Here, each physical property of the twisted cylinder yarn is measured by measuring the outer layer part, then the yarn part from 110 to 120 f from the outer layer part as the middle layer part, and the yarn part from 15 to 251 f from the innermost layer part to the inner layer part,
The threads from the innermost layer to 15F were removed. In addition, Worcester unevenness (URN) was measured as follows using a commercially available Tsurubegar Twin Star Meter UT.
-Using an IC type, draw a Worcester uneven chart for 30 seconds at a yarn speed of 50 m/min, a chart speed of 2.53/min, and a full scale of 100% with a tension of 0.1 f/d, and the chart is halved. Separate, read the maximum peak value appearing on the ■ side θ side based on O in these two sections, add them all up, divide by 2, and calculate the URN.
(%). That is, URN represents the average resin width of the Worcester spot. In addition, the diving contraction rate is JIS L-
Measured according to method 10736-12-B.

Using the highly twisted yarns obtained in Example 1, Comparative Ply and Comparative Example 2 as warp and weft yarns, weaving was performed by alternately driving Sz at a weave density of 166 warp yarns/inch and weft yarn density of 96 yarns/inch, and then, After dyeing and finishing,
60 squares of plain woven fabric with a width of 1,121 meters and a length of 46 meters were made. Also,
The yarns obtained in Example 2, Comparative Example 3, and Comparative Example 4 were used as warp and weft yarns, and the warp yarn density was 105 yarns/inch and the weft yarn density was 84 yarns/inch.2? Fifty pieces of twill were woven, and then dyed and finished to weave a twill fabric with a width of 112c11 and a length of 46m.

Table 2 shows the evaluation of the wrapping and width irregularities of these fabrics.

Here, in the weaving, threads from each main part were used at random, excluding the threads from the innermost layer to 15F.

As is clear from Tables 1 and 2, Examples 1 and 2, which seem to satisfy the requirements of the present invention, have a small difference in physical properties, especially a difference in denier and a difference in shrinkage rate, between the outer layer and the inner layer of the twisted cylinder yarn. A yarn with excellent centering properties was obtained, and a woven fabric woven with the linear yarn could be obtained without envelopment or irregularities in the width. On the other hand, the twisted cylinder yarns of Comparative Examples 1 to 4 had large variations in yarn physical properties within and between cylinders, which caused fabric defects such as wrapping in the fabric and uneven width.

(Effect of the invention) The fabric using the twisted yarn produced by the method of the present invention is a stable crystalline fabric that suppresses the variation in the physical properties of the yarn during the setting of the twisted yarn, and has no fabric defects such as envelopment or irregularities in the width, and has thick and fine yarns. It is a textile that takes full advantage of its unique characteristics.

Patent applicant: Toyobo Co., Ltd. Procedural amendment October 17, 1985 three

Claims (1)

[Claims] The thread has thick sections in the longitudinal direction, and the average boiling water shrinkage rate is 30~30.
1. A method for producing a twisted yarn fabric, characterized in that the weaving is performed by twisting 60% polyester multifilament yarn and setting the twist at a temperature of 60 to 75° C., using the twisted yarn as the warp and/or weft.