JPS616340A - Multi-layered crimped yarn and its manufacturing method - 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 multi-layered crimped yarn having a complicated thick and thin shape using a pre-combustion processing machine, and a method for manufacturing the same.

<Prior art> Conventionally, as a method for obtaining a thick and thin thread by winding a filament thread around a crimpable core thread, for example,
It is publicly known from Publication No. 38375 and the like. The yarn obtained by this method has characteristics as a pongee-like yarn due to its morphological effect.

However, although the yarn shape obtained by the conventional method has a thick and thin shape, the lengths of each of the thick portion and the thin portion are limited to a certain range. For example, an extremely short thick thread with a thick part has no long thick part, and conversely, a thick thread with a long thick part has no part with a short thick part, and the appearance is monotonous. Ta.

<Problems to be Solved by the Invention> The present invention provides a yarn having a mixture of long thick portions and short thick portions and an excellent appearance effect in which the occurrence frequency of the long thick portions is completely controlled, and a method for manufacturing the same. be.

Means and operation for solving all the problems> The present invention has the following features: (1)
) A long thick part, a short thick part, and a long thick part exist in a thick crimped yarn made of a core yarn made of thermoplastic multifilament and a wound yarn made of multifilament yarn wound around the core yarn. A multi-structure crimped yarn having short thick portions and the number of long thick portions being 91 or less per 1ffi in the yarn axis direction. (2) When using a false twisting machine to feed a wrapped yarn made of multifilament yarn to a core yarn made of thermoplastic multifilament yarn in the false twisting region to obtain a thick crimped yarn,
A wrapping yarn fed at a constant overfeed rate and a wrapping yarn fed at a variable overfeed rate are used as the wrapping yarn, and the wrapping yarn fed at a constant overfeed rate is used as the wrapping yarn. This is a method for producing a multi-layered crimped yarn, characterized in that the yarn is fed from a position closer to the core yarn than the feeding position of the wrapped yarn, and downstream from the feeding position of the other wrapped yarn.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic diagram of the yarn of the present invention. Detail 1 and long thick part 21. The short thick part 3 is included in the short thick part 4 and the long thick part 2. Conventional yarns are composed of only the detail 1 and the short thick part 4, or only the detail 1 and the long thick part 2. In the yarn of the present invention, the number of long thick portions 2 is 91 or less per 1 m in the yarn axis direction, and there are many short thick portions interspersed with long thick portions. In this case, a unique appearance effect will be exhibited.

FIG. 2 is a process diagram of a specific example of the method of the present invention, showing the state up to the feed roll of the false twisting machine and the first heater. The tension of the thermoplastic multifilament yarn 5 is regulated within a certain range by a tension regulator 8, forming a linear false twisting region between the core yarn and the yarn path guide 11 and the extender heater 14. .

-1. The multifilament yarn 7 is combined with the core yarn in the false twisting region of the core yarn formed between the heater 14 and the yarn guide 11 by the feed roll 10 and the yarn guide 13 that rotates at a constant rate.

As a matter of course, the multifilament yarn 7 fed by the feed roll 10 is overfed compared to the multifilament 5 of the core yarn.

Further, the multifilament yarn 6 passes through a yarn path guide 12 by a feed roll 9 whose rotation is varied, and is combined with the core yarn in the false twisting retracing region. When the feed roll 9 rotates at a low speed, no thick portion is formed, or even if a thick portion is formed, the thick portion is short. A long thick portion is formed when the feed roll 9 rotates at high speed. In the present invention, the yarn path guide 13 for the multifilament yarn 7 determines the yarn feeding position of the multifilament yarn 7, and the distance to the core yarn in the false twisting area above the heater is the yarn path guide 13 for the multifilament yarn 6. Guide 12
It is necessary to provide the heater at a position shorter than the distance to the core yarn of the yarn guide 12 and close to the heater downstream of the yarn guide 12. Since the yarn guide guide 12 is close to the core yarn, the amplitude when the multifilament yarn 7 is wound around the core yarn is small, and the thick part of the multifilament yarn 7VC is short, resulting in a short thickness as shown in FIG. Section 4 forms.

Further, since the yarn path guide 13 is closer to the heater 14 downstream of the yarn path guide 12, the yarn is fed through the entire yarn path guide 12.

Since the multifilament yarn 6 is wound around the multifilament yarn 5, which is a core yarn of uniform thickness, when the feed roll 9 rotates at high speed, a long and uniform thick portion 2 is formed.

A long thick part is formed by the multifilament yarn f'
After that, in order to form a short thick R1 on the multifilament yarn 7, a short thick portion 3 formed by the multifilament yarn 7 is further included in the long thick portion.

In carrying out the present invention, in the case shown in FIG. 2, a means for varying the number of rotations of the feed roll 9 was used, but the variation in the number of rotations of the feed roll 9 was achieved by fully connecting the servo motor and the feed roll 9. This is possible by sending a signal to. In addition, for example, as shown in FIG. It is also possible to use a method in which the yarn is gripped intermittently, and when the yarn is not gripped, the tensor 15 is used to fully control the yarn feeding tension. Further, as shown in FIG. 4, it is also possible to combine all of the methods shown in FIG. 2 and those shown in FIG.

However, in terms of the diversity of yarn obtained and the yarn production, the methods shown in Figures 2 and 4, which use two feed rolls, are superior.

<Example> The present invention will be explained below with reference to Examples.

Example Using the following samples, experiments were carried out under the following conditions according to the method of each step shown in Figures 2.3 and 4.

(Sample) Multifilament yarn (core yarn) 5...Polyester filament 75d156f Multifilament yarn (wound yarn) 6...Polyester filament 75d/72f Multifilament yarn (wound yarn) 7...Polyester filament/) 75d/72f (conditions) Machine: LS-6 (manufactured by Mitsubishi Heavy Industries, Ltd.) Spindle rotation speed: 14X10' rpm Number of twists: 2300T/MZ71
0 twist heater temperature: 1st heater 2oo℃/2nd heater 2
15℃ Multifilament 5 tension regulator 8 and thread guide 11
Distance between the tension crab 11 and the core thread of the thread guide 12: 400 m + distance from the core thread of the thread guide 13: 100 m + thread guide 12
Distance from the upper end of the heater: 2crn Distance from the upper end of the heater of the yarn guide 13: crn <Effects of the Invention> The present invention is a yarn exhibiting an unprecedented appearance and a method for manufacturing the same. When woven or knitted fabrics are made using this method, not only does it have an extremely superior design effect, but because there are two winding yarns, it has good cohesiveness to the core yarn, and has the advantage of being easier to pass through the process compared to conventional methods. There is also. The method of the present invention can be carried out by simply adding some incidental equipment to a normal false twisting machine.
It has industrial value.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of the yarn of the present invention, and FIGS. 2, 3, and 4 are process diagrams of a specific example for carrying out the entire invention. 1... Details, 2... Long thick part, 3... Short thick part within the long thick part, 4... Short thick part, 5... Multifilament yarn of core thread, 6... Winding Multifilament yarn with attached thread, 7... Multifilament yarn with wrapped thread, 8...
Tension adjuster, 9... Rotation variable feed roll, 1o.
・・Constant rotation feed roll, 11, 12.15・・◆
Thread path guide, 14...1st heater, 15...Lancer, 16...Traverse guide -+ 1 Figure, /',,y",ノ/-+-2Figure/7.q +3 Mouth blue 4 Figure

Claims (2)

[Claims] (1) A long thick part, a short thick part, and a long thick part in a thick crimped yarn made of a core yarn made of a thermoplastic multifilament yarn and a wound yarn made of a multifilament yarn wound around the core yarn. A multi-structure crimped yarn having short thick portions existing in the axial direction, and the number of long thick portions being one or less per 1 m in the yarn axis direction. (2) When using a false twisting machine to feed a wrapped yarn made of multifilament yarn to a core yarn made of thermoplastic multifilament yarn in the false twisting region to obtain a thick crimped yarn, as the wrapped yarn. Using a wrapped yarn fed at a constant overfeed rate and a wrapped yarn fed at a variable overfeed rate, the wrapped yarn fed at a constant overfeed rate is fed to the other wrapped yarn. A method for producing a multi-layered crimped yarn, characterized in that the yarn is fed from a position closer to the core yarn than the yarn position and downstream from the other wrapped yarn feeding position.