JPS609928A - Production of false twisted fancy 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 an improvement in the manufacturing method of a false-twisted design yarn in which a bundled portion and a bulky portion are mixed. [Prior Art] Conventionally, thermoplastic synthetic fiber yarn has been false-twisted. During D-loeing, by changing the yarn length between the heater and the twisting device to vary the number of twists per unit length of the yarn and the heat setting effect, a false twist design with a mixture of focused parts and bulky parts can be created. The method of making thread is special! However, this method requires a complicated device for changing the thread path, and has the problem of high manufacturing costs.

[Purpose of the invention]

The purpose of the present invention is to solve the above-mentioned conventional problems and to provide a method for manufacturing a false twisted design yarn with a large design effect with a large apparent diameter ratio between the bundled part and the bulky part using a simple device at a low cost. It is on offer.

[Structure of the invention]

In the present invention, the twist coefficient lI! ;00 N/! ; Birefringence Δn after actual twisting in the range of 0.000 to 0.0.2 to 0;
This is a method for producing a false-twisted design yarn, which is characterized in that three ester filament yarns having a size of 75 are threaded in a zigzag pattern using a bottle spinner and subjected to a false twisting process without being wound around each bottle.

To explain the present invention in more detail, the spinner used in a normal false twisting machine has one bottle as shown in FIG. The spinner used in the present invention has three pins, and during processing, each pin (3) (da) is used as shown in Figure 1.
(S) without wrapping around each bottle (,?) (4'
) (-!i) By passing the yarn in a zigzag pattern between the threads, the twisting of the yarn due to the rotation of the bin will be unevenly untwisted, similar to the IJ opening, and the heating 1. The untwisted twist density becomes uneven along the yarn length direction.

This unevenness in twist density is due to the frictional resistance between the bins and the thread, but this frictional resistance varies depending on the material of the pin, the contact length between the pin and the thread, the angle between each bin, etc., so it cannot be matched to the desired thread form. All you have to do is take these things into consideration.

Of course, the unevenness of the twist density changes depending on the number of bottles, but it is necessary to consider the nature of threading and the balance between the pin head and the bottle chest, and in reality, three pins are most preferable. In Kohonpin, although the bottle rotates, almost no twist is applied to the thread, and no bulky parts appear.

In addition, in the case of dubon pins, although it is possible to obtain the desired yarn, threading is complicated, and the center of gravity of the spinner shifts to the bin head, making the balance of the pin extremely poor. The main point of the present invention is to use a three-bin spinner and thread the thread in a zigzag pattern between each pin when performing the false twisting process. However, the pyriester filament yarn used also has a birefringence Δn of 0.02 or more and 0.02 or more. / 5 or less,
In addition, it is necessary to have a real twist in advance with a twist coefficient of qsoo or more and 1sooo or less.

Ordinary polyester drawn yarns are sufficiently oriented with △n in the range of o/A to OcoO, and have a well-formed fiber shape. Let's aim now. However, it is necessary to set the false twisting temperature to a high temperature near the melting point, and to reduce the IIO processing speed to an extremely low level in order to promote the temperature effect, and the resulting designed yarn is coarse and hard. , the bulking effect of the bulky part by winding g#i is not sufficient, and the diameter ratio with the focusing part is less than ko,
The design effect will be poor.

- Highly oriented undrawn yarn in the range of θ02≦△n≦O13 responds sensitively to unevenness in twist density, that is, changes in tension, so there is no need for high-temperature false twisting and it is easy to A supplied yarn with n Δn of less than 0.0λ, which causes a change in shape, is difficult to handle in terms of changes in yarn properties over time, etc., and is not practical, although the desired design yarn can be obtained. On the other hand, when Δn exceeds θ15, the cold light approaches that of ordinary drawn yarn, making it difficult to obtain a sufficient design form.

If three pyriester filament yarns with 0, 0.2≦△n≦O/S are subjected to false twisting using a bottle spinner, a designed yarn with a diameter ratio of 3 or more in the bundled part and bulky part can be obtained, but the bundled part The length is short, giving it a tight spit-like shape.

This problem can be solved by giving the polyester filament yarn a real twist with a twist coefficient of ysoo to 1sooθ in advance. With a twist coefficient less than dasoo, the length of the converging section cannot exceed /cmTt, and /! ;000 or more, on the other hand, the bulky parts are restrained by the twisted structure and become difficult to be exposed.

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

〔Example〕

Polyester filament yarn with △n of 0.7 /! ;
Using a yarn made by combining and twisting Od/'Igf in t twist number 300T/MT"S in the twisting direction, the heater temperature is 10C and the processing speed is 50m7 using a false twisting machine equipped with a spinner as shown in Fig. 2.
min, spindle rotation speed//X/0' r, p, m
As shown in Fig. 3, the length of the convergent part (I) is /-gα, and the length of the bulky part (B) is /~lIC! n,
A false twisted design yarn rich in design effects was obtained in which the apparent diameter ratio of the bulky part (medium) to the converging part (i) was about g.

[Effects of the Invention] According to the present invention configured as described above, it is possible to inexpensively produce a false twisted design yarn rich in design effects with a large apparent diameter ratio between the converging portion and the bulky portion using a simple device. The industrial effect is extremely large.

[Brief explanation of drawings]

Figure 1 is a MUf side view of a normal 7-pin spinner, Figure 1 is a w:VlfT side view of a 3-pin spinner used in the present invention, and Figure 3 is a false twisted design yarn obtained by the present invention. In Figures 1 to 3, (1) is a polyester filament yarn, <s) + (3) l (<z) + (
&) is the bottle, i) is the focusing part, and monkey) is the bulky part. Odd f diagram ÷2 same

Claims (1)

[Claims] Three polyester filament yarns with a birefringence △n of aO~alS, which had been actually twisted in the range of twist coefficients 1Isoo-i and zoooo, were twisted around each pin using a pin spinner without winding the yarn. A method for producing false-twisted design yarn, which is characterized by passing the yarn in a zigzag pattern and subjecting it to false twisting.