JPS58115140A - Production of bulky 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 The present invention relates to a method for producing a bulky yarn, and more specifically, a process for producing a bulky yarn by subjecting two or more yarns to a fluid injection process to form loops and slacks. Method E@.

Demand for bulky yarns using continuous filaments has increased rapidly in recent years because they have a silky feel and are easy to handle in post-processes such as papermaking.

Methods for manufacturing spunlike yarn using continuous filaments include, for example, a method of false twisting, a method of forced random fluffing, a method of bulking using fluid jetting, etc. Many methods have been proposed.

However, with these conventional methods, manufacturing needs become complicated.1. However, the quality of the obtained bulky yarn is inferior, and so far, satisfactory results have not been obtained. First of all, those that have undergone temporary coating are bulky.

Although it has a good texture, it has latent torque and is difficult to handle in post-processes such as weaving.

In addition, the method of fluffing has the disadvantage that it is difficult to fluff uniformly and tends to become uneven, resulting in poor quality of the resulting fabric. Furthermore, as methods for manufacturing bulky yarn using fluid jetting, there are, for example, JP-A No. 1311151 and JP-A No. 55-45821, but these methods do not require the use of two or more yarns. 1. Guide the strips through fluid jetting to create loops and slack. Both methods restrict the thread supply system to the nozzle, complicate the supply method, and form rough loops and slack.
There are disadvantages such as the process is complicated and speeding up is difficult.

Therefore, the inventors of the present invention have made extensive studies to eliminate the above-mentioned drawbacks and obtain a good bulky yarn. When forming loops or slacks by fluid jet processing, the present inventors have found that three or more yarns can be simply spliced with a fluid at different speeds. In addition to being supplied to the injection nozzle, among the yarns with different speeds, the yarn with the slowest feeding speed and the yarn with the fastest feeding speed have a large shrinkage difference and have a large ability to form loops and slacks. The present invention was achieved by discovering that it is possible to increase the speed and that there is no need to regulate the yarn supply yarn guidance.
．． In other words, the present invention supplies a plurality of yarns to a fluid jet nozzle at different speeds to form loops and slacks to produce a bulky yarn, and then draws the yarn supplied at the fastest speed. This is a method for producing bulky yarn in which the heat treatment system and 17. yarns fed at a slow rate are drawn into a non-heat treatment system.

Hereinafter, the present invention will be explained in detail with reference to FIG. 1i1.

FIG. 1 is a schematic diagram showing an example of a bulky yarn manufacturing factory according to the present invention, in which the yarn X unwound from the undrawn yarn package 1 is passed through a feed roller 31 separated by .mu.m 3', It is stretched by a separation p-ra 4' to a desired stretching ratio Km and supplied to a fluid injection nozzle. On the other hand, the yarn Y unwound from the undrawn yarn package 2 is stretched by a feed roller S9, a separating roller 6', a stretching roller 6, and a separating roller 6'. Here, the drawing roller 4 has a peripheral speed higher than that of the drawing roller 4 and is a heating p-roller, and heat-treats the yarn. The yarn Y coming out of the drawing roller 6 is supplied to a fluid jet nozzle in a form where it is aligned with the yarn X, and a loop or slack is formed by stirring tRk, and a bulky filament 2 is obtained. This bulky yarn 2 is
It is taken up by a pulling roller and a separation roller 8' whose speed is slower than either of the two, and then rolled into a packaging machine.

If many loops or slacks are to remain, the take-up line 89 and separation p-line 8' may be omitted and the loops may be wound directly onto the package 9, or weak loops,
If you want to remove slack 1-, remove it between the p-ra and the package 9.] [K draft--ra can be installed. However, a Kf rate heater or a saddle type heater is installed between the feeder 2 and the vine roller 6 for heat treatment. 1. The good things are amazing. Furthermore, although the figure shows an example in which fluid jet processing is performed using two threads, a combination of three or more threads may also be used.

The threads used in the method of the present invention include polyester fibers,
Stretchable thermoplastic synthetic fibers such as polyamide fibers are used.

In the present invention, a plurality of yarns are supplied to the fluid injection nozzle at different speeds, and the yarn is supplied at the fastest rate in the drawing heat treatment system, and the yarn is supplied at the slowest rate. It is necessary to use a stretched, non-heat treated yarn. The drawn heat-treated type has a low heat shrinkage rate, and the drawn non-heat treated type has a high heat shrinkage rate, so the drawn non-heat treated type is fed at a slow speed and becomes the core yarn, and is fed at a fast speed to form sufficient loops and slack. The drawn and heat-treated yarn constitutes the sheath yarn, and the bulkiness is improved due to the difference in shrinkage rate, resulting in an extremely pleasant spunlike bulky yarn.

In this case, the drawing heat treatment system and the drawing non-heat treatment system may be the same type of synthetic fibers or may be different types of synthetic fibers.

If you set the value to 5 so that the single yarn fineness of the drawn heat-treated yarn fed at a fast speed is smaller than that of the drawn non-heat treated yarn fed at a slow speed, more loops and sagging will occur. It is preferable because it can be formed easily and has a soft texture.

This will be explained in more detail below with reference to Examples.

Example 1-3. Comparative Examples 1-3 Stretched yarn Zoo denier 24 filament, 1
00 denier 4-filament.

Using a nylon filament yarn of 1.0 denier, S filler, and mend, fluid jet bulking processing was performed under various processing conditions using the processing equipment shown in the figure. The results are shown in the table below.

Here, the bulkiness of the yarn is the value of the specific volume (al/f') when the yarn is wound with a tension of Q O5f/d・, and the number of loops is the value of the specific volume (al/f') when the yarn is wound with a tension of α1 f/d・The number of loops observed and the loop strength are the number of loops observed by planar observation under L@t/a tension. The texture of the fabric is 1
00 denier 24 filament non-bulky yarns are used as warp threads,
The texture of a fabric using TESS F bulky yarn as a weft was rated as S stage by 15 people.

As is clear from the table, when the yarn Y is drawn at a higher speed than the yarn X, and the yarn YK has a smaller weave change, and the drawing heat treatment is performed, the woven fabric has a higher bulkiness t, more loops, and You can get something with a nice texture.

[Brief explanation of the drawing]

The figure is a simplified side view showing an example of a device implementing the present invention. 1.2...unstretched package, 3. ! ! -Feed roller, 4.6...Panel roller, 1...Fluid injection nozzle, S-・Take-up--Ra

Claims (1)

[Claims] L II Feeding several yarns to a fluid jet nozzle at different speeds 11 To produce bulky yarn by forming loops and slacks @L, Yarns fed at the fastest speed A method for producing bulky yarn in which the yarn is a heat-stretched yarn, and the yarn fed at the slowest speed is a non-heat-treated yarn. 1. The method according to claim 1, wherein the single yarn fineness of the yarn fed at the fastest speed is smaller than the single yarn softness of the yarn fed at the slowest speed.