JPS59187635A - Production of composite processed 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 [Technical Field] The present invention relates to a method for producing a composite textured yarn having a two-layer structure.

[Prior art]

Conventionally, it is widely known that a composite textured yarn having a two-layer structure is produced by aligning low-elongation polyester yarn and high-elongation polyester yarn and subjecting them to false twisting, but there is one problem with this method. Since yarns with different elongations are simultaneously false-twisted, yarn cracking may cause neps and slab formation, which may interfere with the false-twisting process and subsequent processes, or reduce product value. To solve these problems, it is necessary to improve the cohesiveness of composite textured yarn. As a means for this, there is a method in which a low elongation polyester yarn and a high elongation polyester yarn are interlaced in advance with air (9), the yarn is twisted and then false-twisted, or the yarn is air-entangled or twisted after false twisting.

However, with this conventional method, air entanglement and twisting are performed before and after the false twisting process, which complicates the process, adversely affects workability and yarn quality, and increases the cost. there were.

[Purpose of the invention]

An object of the present invention is to solve these conventional problems and provide a method for manufacturing composite textured yarn with excellent cohesiveness at low cost by performing air entanglement and twisting.

[Structure of the invention]

In other words, the present invention is designed to reduce the maximum amount of bubbles generated between the heater and the spindle when forming a composite textured yarn with a two-layer structure by false-twisting a low-elongation polyester yarn and a high-elongation polyester yarn in a state in which they are aligned. This is a process for manufacturing composite textured yarn characterized by controlling the balloon in the heating region by providing a guide between the forming position and the spindle and outside the trajectory of the balloon.

To explain the present invention in more detail, two combinations of low elongation polyester yarn and high elongation polyester yarn in the present invention include undrawn yarn, a combination of partially drawn yarn and drawn yarn, and combination of undrawn yarn and partially drawn yarn. , a combination of two types of undrawn yarns with different spinning speeds, a combination of two types of drawn yarns with different drawing conditions, etc. In addition, the low elongation polyester and high elongation polyester referred to here refer to so-called thick-and-seen yarns in which low-orientation portions and high-orientation portions alternately exist even if the yarn is uniform along the length direction.
It may also be a seed. The present invention focuses on the fact that when two types of polyester yarns with different elongations are simultaneously false-twisted, the cohesiveness of the composite textured yarn changes depending on the change in the balloon in the heating area. This improves convergence.

Conventionally, the method of reducing the size of the balloon in the heating area is that as the false twisting speed increases, the balloon in the heating area becomes larger and the stability of processing deteriorates.

There is a method to make the balloon smaller by installing a guide in the middle of the straight line connecting the heater and the spindle, but this method certainly improves the processing stability, but it is not possible to achieve the composite processed yarn with excellent cohesiveness that is the aim of the present invention. cannot be obtained. In order to achieve the object of the present invention, as shown in FIG.
It is necessary to stop the formation of balloons between the

If it is a normal false twisting machine, the position of the guide 5 is the second position.
As shown in the figure, if there is a distance a from the spindle side along the straight line connecting the heater 4 and the spindle 6, and a distance in the vertical direction from the straight line connecting the heater 4 and the spindle 6, then a is 1~
7c! IL, b may be at a position of 1 to 7cIrL.

At this time, even if a small balloon were to occur between the heater and the guide, it would not have much of an effect on the focusing performance. In this case, in order to make the present invention more effective, it is more preferable to use an eccentric spinner as the spindle. As a means for controlling the balloon, it is preferable to use a guide, a bottle, etc.

The present invention will be explained in more detail below with reference to Examples.

[Example 1] Low elongation polyester yarn (147 denier 748 filament, elongation 110%), high elongation polyester yarn (119
Denier 736 filament.

elongation 154%) and distance between heater and spindle 28cr
Spindle rotation speed 200,000 r, p, with IL false twisting machine
m, number of false twists: 1700 T/M, stretching ratio: 1.
154° (5) Heater temperature 192°C1 Use of eccentric spinner and distance L from spindle to balloon maximum width formation position P
14 CIrL+ When the maximum balloon width R = 1 cm, false twisting was performed at the same time under the conditions shown in Table 1 with the position of the balloon stopper guide. The cohesiveness of the obtained composite yarn, the passability of the weaving process when it was made into a fabric, the neps due to yarn breakage in the product, and the product defects in slab formation were evaluated, and the results are shown in the same table.

(6) [Example 2] Low elongation polyester yarn (75 denier/36 filaments, elongation 28%), high elongation polyester yarn where the highly oriented portion and the low oriented portion are continuous with each other along the length of the yarn Polyester yarn (87,3 denier/36 filament).

Δn of highly oriented portion = 0.140 to 0,150. △n of low distribution part = 0.020 to 0.030. elongation 65%)
A false twisting machine with a distance between the heater and spindle of 28 cIrL, spindle rotation speed of 210,000 r, pom, number of false twists of 2100 T/M, overfeed rate 0%.

Heater temperature: 190°C1 Distance L to balloon maximum width formation position P using eccentric spinner and spindle:
14 CIIL* Balloon widest width R= 0.5 an
The position of the pulse guide at 0 o'clock is a = 2.58R + b
Simultaneous pulling and alignment processing under the condition of = 3cm.

A composite processed yarn with excellent bundling properties was obtained, and when it was made into a fabric using this composite processed yarn, it had a soft, spun-like texture, and a dark-colored slab due to dyeing. A fabric was obtained.

〔Effect of the invention〕

According to the present invention configured as described above, a special effect is achieved in that a composite textured yarn with excellent cohesiveness can be obtained at a low cost without performing air entanglement or twisting.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an example of the apparatus used to carry out the present invention, and Fig. 2 is an enlarged view of the heating area in Fig. 1. In Fig. 1 and Fig. 2, each number and symbol is as follows. shows. 1 Low elongation polyester yarn 2 High elongation polyester yarn 3 Feed roller 4 Heater 5 Balloon/stop guide 6 Spindle 7 Delivery roller 8 Wider/Der B Balloon trajectory P Balloon maximum width formation position R Balloon maximum width L From spindle P Distance a Distance from the top of the spindle to guide 5 b Distance from the straight line connecting the heater and spindle to guide 5 (9)

Claims (1)

[Claims] When a two-layer composite textured yarn is formed by aligning low-elongation polyester yarn and high-elongation polyester yarn and false-twisting them, the maximum mid-forming position of the balloon that occurs between the heater and the spindle and the spindle. Between and Baloo/
A method for producing a composite processed yarn characterized by controlling a balloon in a heated region by providing a guide outside the trajectory of the balloon.