JPS5813735A - Extensible yarn and 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 The present invention relates to a stretchable yarn that can be efficiently produced, has a soft texture, and can increase transparency, particularly in the case of yarns that require transparency, and a method for producing the same.

For example, threads made by twisting polyurethane elastic threads and woolly threads are used as stretchable threads used in clothing such as socks. This yarn is made by heating a woolly nylon yarn supported by a spindle on a polyurethane elastic yarn that is stretched at a constant elongation rate and passed through a spindle. Because of this, the winding diameter can be made considerably large, and it can be used continuously for a long period of time. However, since the bobbin wound with woolly nylon thread is supported on a spindle, the winding diameter does not increase by itself. There is a limit and it cannot withstand continuous use for a long period of time. For example, even if a fully loaded bobbin is placed on the spindle in the morning, it will be consumed in the evening or early that evening and the spindle will have to stop. It's gone. In order to operate it continuously, it would be a different matter if personnel were stationed continuously for 24 hours, but if the weight is stopped at night, it will remain stopped until the next morning, resulting in a lot of lost work time.

Therefore, the inventor considered that by increasing the length of the thread when winding the thread onto the bobbin supported by the spindle, it would take longer for the thread on the bobbin to be consumed. However, it is impossible to simply increase the winding diameter of the bobbin, and in order to increase the thread length without increasing the bobbin diameter, the fineness of the thread must be reduced. However, in that case, it is necessary to cover the polyurethane elastic yarn.
-The amount of nylon thread decreases, resulting in unsatisfactory thread.

For this reason, the present inventor has developed a method by feeding nylon or the like to the spindle at the same elongation rate as the spandex yarn, and winding the fine nylon yarn wound around the bobbin on the spindle around both of the yarns. Both threads are integrated.

Embodiments of the present invention will now be described with reference to the drawings. In Figure 1, 1 is an elastic thread (such as polyurethane elastic thread or rubber thread).
The elastic yarn (hereinafter simply referred to as "elastic yarn") is wound around a pair of yarn feeding rollers 2 and 3 by changing the rotational speed of roller 3 relative to roller 2 between the yarn feeding rollers 2 and 3 to give appropriate elongation. It is being 4 is a splint thread, depending on the thread quality,
A woolly nylon thread or a transparent thread is used as appropriate, and the yarn is wound around the yarn feeding roller 3 through the tensioning device 6. Between the yarn feeding roller 3 and the tensioning device 6,
It is taut and has been stretched at an elongation rate of 0 or at an appropriate elongation rate. Then, both yarns 1 and 4 pass through the spindle 6, and at this time, from the point 7 supported by the spindle 6, the fineness of both the yarns is 20/100 to 5/100, for example, about 14 d. In the case of winding made of monofilament yarn, for example, nioleon yarn, yarn 8 is wrapped around both yarns 1 and 4. The number of times of wrapping is about 250 to 750 times per meter.

The stretchable thread 16 around which the splint thread 8 has been wound is released from tension and wound into the package 11.

In the above case, boliure and tan elastic threads are used as the elastic threads, and woolly nylon threads are used as the splicing threads.

In this case, 7 od of woolly nylon thread was used as a splicing thread for each of the polyurethane elastic threads 20d, 30d, and 40d.
There are 140d combinations. Yarns made from woolly nylon are mainly used for socks and the like. Furthermore, when making a so-called highly transparent thread for use in foundations, etc., so-called transparent nylon may be used as the splint thread.

Although the present invention is made as described above,
When the thread 8 is wound around the elastic thread 1 and the splint thread 4, the state shown in FIG. 2 is obtained. That is, the elastic thread 1 is stretched and rises in alignment with the splint thread 4, and the wrapped thread 8 is wound around it, joining both threads 1 and 4. The stretchable yarn 10 that has passed through the yarn feeding roller 3 is released from the stretched state and is contracted as shown in FIG. Therefore, even if it is completely shrunk, it is longer than the elastic threads and remains bent and entangled around the other elastic threads 6. Further, the wrapped thread 8 is entangled in a state surrounding both threads 1.4.

Since the winding thread 8 is not stretched at all and is extremely thin, the woolly nylon thread 4 is twisted around the polyurethane elastic thread 1 in such a way that it is pressed down.

If the number of windings is too small, many swollen parts will be seen, and if the number of windings is less than 250, the elastic thread and the splint thread 4 will separate. The more times you wind the filament, the more parts will hold down the expanded filament, resulting in a tighter thread.
When the number of windings exceeds 750, the thread quality becomes tight.

The yarn shown in FIG. 4 uses a so-called transparent nylon filament for the splint 4. Unlike woolly nylon, the so-called transparent nylon filament is not subjected to bulking treatment and has little elasticity. Therefore, when the polyurethane elastic yarn 1 is fed to the spindle 6, it is in a stretched state, but
In the case of a so-called transparent thread, it is not in a particularly stretched state, and since the thread 8 is wound on top of it, when the stretch of the elastic thread 1 is released, the elastic thread 1 becomes a straight line as shown in Fig. 4. The splint 4, which cannot be shrunk, forms a loop 16 around the splint 4, and the thread 8 is wrapped around the loop 15 to hold it down.

As described above, the method of the present invention involves supplying splint yarns to the elastic yarns in an aligned state, and surrounding both yarns with extremely thin, e.g.
Since the thread is wound with a small number of twists, the total length of the thread held on the bobbin on the spindle can be extremely long, and the time interval between bobbin replacements is reduced. can be made longer. Therefore, it is possible to reduce the occurrence of a situation in which the splint thread on the bobbin is exhausted during the night and the spindle must be stopped until the next morning, and operational loss time can be reduced.

Furthermore, since the length of the yarn 8 can be increased by winding, the number of knots generated in the wound package 11 can also be reduced, and the quality of the yarn can be improved.

In the yarn produced by the method of the present invention, the splint yarn fed to the elastic yarn in a splint-like manner is not twisted with the elastic yarn.
When woolly nylon thread is used as the splint thread, the woolly nylon thread surrounds the compressed elastic thread in a swollen state, and the extremely thin winding around the woolly nylon thread means that the thread is wrapped with a small number of twists. Because of this, it has good large-type characteristics and can make the yarn extremely soft.

In addition, unlike yarns such as conventional SZ yarns, which have a noticeable twist direction, there is no twist direction at all, so the difference between S-twist yarn and Z-twist yarn is
The use of the yarn of the present invention also eliminates the trouble of preparing seed yarn and knitting it alternately for each course.

Furthermore, when transparent thread is used as the splint, since the splint and the elastic thread are not heated, the transparent thread is positioned around the elastic thread in a swollen state, and the thread is also wrapped. Because the transparent thread is held down by extremely thin threads, the transparency is not impaired at all.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an apparatus for carrying out the method of the present invention, FIG. 2 is a front view of the yarn of the present invention under tension, and FIG. 3 is a front view of the yarn of the present invention using woolly nylon as the splint. FIG. 4 is a front view of the yarn of the present invention using transparent yarn as the splint yarn. 1... Elastic thread 2, 3... Yarn feeding roller 4...
・Splint thread 6...Tension device 6...Spindle 7...Bobbin 8...Thread with winding
10...Stretchable thread 11...Package patent applicant 9-Sangyo Co., Ltd. Agent Patent attorney Katsu Ohno Reiko Ohno Yanosuke Ohno Figure 13 Figure 13 Figure 2

Claims (1)

[Scope of Claims] 1. A state in which a splicing thread attached to an elastic thread such as a polyurethane elastic thread and having a lower stretch rate than the elastic thread swells and bends around the elastic thread when the elastic thread contracts. The elastic threads are located in an untwisted state, and the elastic threads and the splint threads include monofilament threads, which are extremely thin compared to the two threads and have a fineness of 20/100 to 5/I00 of the two threads per meter. An elastic thread that is wrapped in a range of 250 to 750 times and tightened at the swollen and bent portion. 2. Add a splint to an elastic thread such as a polyurethane elastic thread that has been stretched to a predetermined stretch ratio, either in a non-stretched state or under a lower stretch ratio than the elastic thread, and then Then, by winding extremely thin monofilament yarn 250 to 750 times per meter around both yarns having a fineness of 20/too to 5/loo, the elastic yarn is brought into a non-stretched state. A method for producing an elastic thread, comprising forming a swollen part of a spliced thread around an elastic thread, and a part held by a thread by wrapping the swollen part around the elastic thread.