JPS6030629B2 - Package of synthetic fiber drawn yarn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a package of drawn synthetic fiber yarn, and an object of the present invention is to prevent the occurrence of damage occurring on the end surface of the package in a fabric using drawn synthetic fiber yarn as a striped yarn. It is an object of the present invention to provide a package of drawn synthetic fiber yarn having a half-traverse length in which uneven yarn portions of the drawn synthetic fiber yarn do not periodically concentrate on the fabric surface.

The drawn yarn obtained by cold drawing or heating drawing of undrawn synthetic fiber yarn is traversed by a traverse guide and wound into a cheese-like or cone-like package.

Generally, the winding speed is a constant high speed of 500 to 1500 skins/min, and the traverse speed is 500 to 1500 times/min. The traverse speed is normally varied with an amplitude of 1 to 3% and a period of 10 to 6 in order to prevent ribbon wrap, and the average half of the synthetic fiber drawn yarn wound into the package is The traverse length T (arc) is as follows. 100 x winding speed (2' minutes) T (伽) = 2 x average traverse speed (times/min) In other words, the length of the drawn yarn from one package end face to the other package end face is the average value of

In thermoplastic synthetic fibers such as polyamide and polyester, when the drawn yarn wound into a package is left until it is machined, vertical pressure is generated due to the recovery of the internal strain of the drawn yarn. There is a difference between the moisture content of the drawn yarn in the center of the package, that is, the moisture content of the drawn yarn immediately after winding, and the moisture content of the drawn yarn on the package end, that is, the drawn yarn in the atmosphere in which the package is left. Because the saturated moisture content of the threads is usually different, there is a difference in yarn quality between the drawn yarn at the center of the package and the drawn yarn at the end of the package, and the drawn yarn at the end of the package has uneven texture. becomes.

The filamentous spots appear at a period of half traverse length T (弽),
When these filamentous unevenness is periodically concentrated on the surface of the fabric, glossy unevenness occurs and the quality of the fabric is degraded. As a method to prevent such defects, namely, the appearance of glossy spots due to periodic concentration of thread unevenness on the fabric surface, the thread unevenness can be prevented by increasing the amplitude of the fluctuation of the traverse speed and shortening the period. A method to greatly disturb the cycle in which
(Refer to Publication No. 217), but this method increases the mechanical load on the traverse section in order to increase the amplitude and frequency of the fluctuation in traverse speed (specifically, the amplitude of fluctuation to 3% or more). physically undesirable.

In addition, fluctuations in the winding tension due to periodic fluctuations in the traverse speed become large. The present invention solves the above-mentioned drawbacks without increasing the mechanical load on the traverse portion, and ``the yarn unevenness that appears at a slightly varying period T does not concentrate on the fabric surface. The present invention provides a package of drawn synthetic fiber yarn wound at a half-traverse length, which can be wound to a half-traverse length so as to prevent gloss spots from appearing on the surface.

That is, the present invention is a package for supplying a weft yarn with a weft driving length of 114 to 144 mm, in which a synthetic fiber drawn thread is wound into a cheese shape or a cone shape, and
Synthetic fibers whose average half traverse length is 50 to 54 or 75 to 108 even when wound into the package, and the amplitude of fluctuation in half traverse length is less than 3%. This is a package of drawn yarn.

The traverse width of a winding machine for winding synthetic fiber drawn yarn into a cheese-like or cone-like package is usually about 30 cm or less, and the half-traverse length is generally about 150 cm or less.

On the other hand, the width of the woven fabric in looms such as water jet looms that drive the weft directly from the package into the fabric is generally 40 inches to 48 inches. .If the weft insertion length of the woven fabric is L (K), and the integer closest to L/T is m, the shortest distance ΔL (K) in the striped yarn direction of uneven thread quality on adjacent total yarns is as follows. It seems that △L=IL1m×T
1 (However, 0≦△LST/2) Note that △ now fluctuates with periodic fluctuations in the traverse speed, and the relationship between the average value △La of △L and the fabric quality is as shown in Table 1. .

It seems that even if the thread flaw spots on the striped threads, which are located apart from one or more striped threads, accumulate periodically, they do not reduce the quality of the fabric.

Figure 1 shows the relationship between the fabric quality, average half traverse length and total yarn driving length obtained based on the relationship in Table i. The axis is the length of the striped thread (ga).

Again, A is a region where the fabric quality is good, and B is a region where the fabric quality is poor. As is clear from Figure 1, the range of average half traverse length in which the quality of the fabric is good in the entire range of weft driving length is 50.0 or more and 54.0 or more.
ribs, and 75.0 skin or more and 108.0 skin or less. Hereinafter, the effects of the present invention will be explained based on Examples.

Example 70 denier No. 24 obtained by drawing undrawn nylon 6 yarn
When winding the filament yarn into a cheese-like package at a speed of 1200 mm/min, the average half traverse length is 4
From 0 to 120 points, the amplitude of the fluctuation in traverse speed was set to 1.5%, the period was set to 20 seconds, and the wire was wound up while being traversed by a traverse guide.

Table 2 shows the quality of the fabrics obtained by unraveling the yarns from the packages and using them as wefts for fabrics having silk thread penetration lengths of 114 to 144 mm. Table 2 In Table 2, 0 indicates good fabric quality, and × indicates poor fabric quality.

As is clear from Table 2, the quality of the fabric in which yarns were unraveled from the package obtained by the method of the present invention and used as weft yarns was good over the entire range of weft insertion lengths; The quality of the fabric is poor at the driving length.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the relationship between fabric quality, average half-traverse length, and weft insertion length.

Claims (1)

[Claims] 1 A package in which synthetic fiber drawn yarn is wound into a cheese or cone shape and for supplying weft yarn with a weft driving length of 114 to 144 cm, and the yarn wound in the package is Average half traverse length is 50-5
4 cm, or 75 to 108 cm, and the amplitude of the half-traverse length variation is less than 3%.