JPS5982424A - Production of composite spun yarn - Google Patents

Abstract

PURPOSE:To obtain composite spun yarns at a high speed, by breaking a filament tow between delivery rolls and stretch-breaking rolls rotating at a higher peripheral speed than the delivery rolls, joining the broken tow to another filament yarn fed to the stretch-breaking rolls under a high tension together, and processing the resultant composite yarns with a fluid in a state under tension. CONSTITUTION:A tow 1 consisting of continuous filaments is stretch-broken between delivery rolls 5 and a pair of stretch-breaking rolls 9 rotating at a higher peripheral speed than the delivery rolls 5 to form a fleece of short fibers, which is then joined to another filament yarn 2 fed to th stretch-breaking rolls 9 by a tension adjusting apparatus 4 under a high tension. The resultant composite yarn is then taken out of the stretch-breaking rolls 9 with an air nozzle 10 having the sucking and turning action while keeping the tension state of the filament yarn 2 to be fed to the stretch-breaking rolls 9 and then passed through an air nozzle 11 having a strong turning actin in the direction opposite to the air nozzle 10 to give a composite spun yarn 12, which is then wound by a winder 14 into a cheese 15. EFFECT:Both spun yarnlike feeling and improved functionality of filaments.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for highly efficiently producing a composite spun yarn that has both a spun yarn-like texture and excellent functionality of filaments.

Conventionally, Neri-combined spun yarn of short fibers and long fiber filaments was produced by using one spinning machine in the spinning process to supply filament yarn to the drafted roving, compounding it, and adding actual spinning using a ring traveler. The so-called Core Subaru technology, which involves winding up the material by a long distance, is known. However, since this method uses fruit, the spinning speed is at most 10 to 20 thr 7
However, it has the disadvantage of being limited to a low speed of 10 minutes and being quite expensive.

Recently, research has been carried out to develop and research flameless spinning methods or bundled spinning methods, which have fundamentally different production principles from conventional spinning methods, and are becoming capable of producing spun yarn with extremely high efficiency. That is, FIG. 1 is a process diagram showing an example, in which 1 is a tow made of continuous fibers, which is stretched and drawn between a delivery roller 5 and a military service roller 9 that rotates at a surface speed of the delivery roller 5. The short fiber fleece is cut into a short fiber fleece, and then the short fiber fleece is carried out by an air nozzle 0 having a suction action from a tension cutting roller 9. The short fiber fleece is conjugated by an air nozzle 11 having a swirling action, and then passed through a winder. It winds up at 14.

An object of the present invention is to improve a method for producing a composite spun yarn with low efficiency using a conventional spinning method, and to improve the method for manufacturing a composite spun yarn with low efficiency by using the above-mentioned fluid-based spinning method. The objective is to propose a manufacturing method for.

j! 11. According to the present invention, a tow consisting of continuous long fibers is cut into short fiber fleece between a delivery roller and a pair of tension cutting rollers that rotate at a circumferential speed higher than the circumferential speed of the delivery roller. In the method of producing spun yarn with high efficiency by subsequently subjecting the short fiber 7 lease to a fluid treatment, another yarn is supplied at high tension to the tension cutting row 2- and is composited with the +1 fiber fleece. , and 7. The present invention provides a method for printing a composite spun yarn characterized by performing fluid treatment while maintaining the tension state of the yarn supplied by the tension cutting roller.

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

FIG. 2 shows a process section showing an example of a tow in which the entire method of the present invention is carried out, in which 1 is a drawn tow made of polyester fibers with a total denier of 1]00 de and jl yarn tenier of 0.5 de; The material is sent through a tension adjusting decoration 3 and then stretched and cut by a hanging roller 5 and a tension cutting roller 9 which rotates at a high speed of 17 times the surface speed of the delivery roller to obtain a BO count (fine count). ) Complementary 9I Juni fleece. On the other hand, as another yarn supplied to the tension cutting roller, the total denier is 5ode, $ yarn denier is 2. The Borien Teru multi-filament yarn 2 having a triangular cross-section of lde is supplied to the tension cutting roller 9 from the leather cutting part through the tension adjusting device 4, and the tension cutting roller 7 is fed along with the short fiber fleece of the 80th yarn count. −
9 through an air nozzle 10 which has a suction action and a swirling action, and then another air nozzle 11 which has a strong swirling action in the direction opposite to that of the air nozzle 10.
The short fiber navy fleece is wound around the filament yarn 2 and wound around cheese 15 by a winder 14 as a composite spun yarn 12.

Here, generally the speed of the take-up roller 13 is $l;I
Normally, the speed is lower than that of the J roller to lower the yarn tension at the yarn forming part where the yarn is fully bonded by fluid treatment, thereby increasing the zero-force twisting effect of the air nozzles 10 and 11.
When a filament is fed to the tension cutting roller 9 under these conditions, the filament side of the resulting composite spun yarn may sag and come out on the outside of the yarn, or may be wound with the IEi fibers.

There is a problem that the tangle becomes weak, making it difficult to weave and make, and it cannot withstand use for a long time.

That is, Table 1 shows the composite lf obtained when the overfeed rate (OF) of the yarn forming section and the yarn tension when feeding the filament 2 to the writing roller 9 were variously changed.
3 shows the quality evaluation of yarn.

Table 1 As is clear from Table 1, composite spun yarn other than products (f
In order to do so, it is necessary to use a certain appropriate combination of conditions. In other words, the tension of the filament thread supplied to the military 1' J-ra needs to be high, and the tension is in the range of 0.7 f/da to 1.5 f/de. is the best, and it is necessary to apply conjugation without loosening at the thread forming part.

Is the supply tension of the filament yarn 0.7? If it is less than /'d@, there is a drawback that even if the conjugation OF of the yarn forming part is made small, the filament will come out in a slack state on the outside of the yarn, and the conjugation with the 9fLf1i2 fibers will be weak. On the other hand, the tension of the filament yarn O1 is 1.5 f/
If the yarn exceeds 50%, yarn breakage is likely to occur, and if yarn breakage occurs frequently, problems will occur.

Moreover, when the conjugation OF becomes larger than 0%, even if the supply tension of the filament yarn is increased considerably, the filament is not attached to the outside of the yarn (1
tlj Vcfr-There is a drawback that it comes out in a loose state.

On the other hand, when the conjugation OF becomes less than 13%, the yarn tension at the yarn forming part is not high, and the yarn becomes difficult to twist by the air nozzles IO, 11, which causes the short fibers to wind around the wheel stopper roller 9. It tends to be easier.

Here, the tow 1 is made of polyester, polyamide, or acrylic if it is made of continuous filaments.

An example is one made of fibers of aromatic polyamide (11), and the single yarn denier, cross-sectional shape, gloss, etc. may be appropriately selected depending on the purpose. Also, filament thread 2
As long as it is a continuous yarn, the above-mentioned T11 fiber can be used, and it is not limited to multifilament yarn, but also spun yarn (synthetic yarn).
L natural fibers) etc. can be used and are not particularly limited. Furthermore, the tension cutting roller supply yarn may be supplied by one or several other yarns.

In addition, regarding the position of the wood cutting roller (between the sheep cutting roller outlet of the thread forming part and the air nozzle 10, or
Yarn can also be fed from between the air nozzles 10 and 11, but the pulling section 11! The best yarn quality can be obtained by feeding the yarn from ii to the inlet of the tension cutting roller 9.

The composite spun yarn obtained by the method of the present invention has little unevenness in thickness and is strong enough to withstand weaving and knitting even though it is not twisted, and can be used not only for spun looms but also for filament. Its versatility is extremely wide, as it can be used with various innovative looms such as looms and water jet looms.

Examples will be explained below.

Example 1 A total denier of 9 was applied to tow 1 by the process shown in FIG.
A tow made of aromatic polyamide fibers having a fiber count of 1.000 de and a single yarn denier of 1.2 de was used, and the tow was cut into short fiber fleece equivalent to No. 17.7 at a stretch cutting section with a draft ratio of 30 times. On the other hand, filament 2 has a total denier of 150d.
e. Using a polyester multifilament with a single yarn denier of 48 de, a tension of 1002 was applied, and the aromatic polyamide short fiber fleece was supplied to the drawn yarn forming unit to conjugate 0.
At F-0.5%, the filament is circumferentially I by an air nozzle 10 with a swirling action of pneumatic pressure 5 Kg/knee and an air nozzle 11 with a pneumatic pressure "f/cttl" with a swirling action in the opposite direction to 2L. Aromatic polyamide short fibers were wound and entangled 1. A composite spun yarn 12 consisting of polyester fibers and aromatic polyamide fibers was obtained.For comparison, a composite spun yarn 12 was obtained using only aromatic polyamide fibers without inserting filaments. A non-twist spun yarn with a high count was obtained.The quality of both is shown in Table 2.

Table 2 The kt yarn obtained here/by the method of the present invention has a core mainly made of polyester multifilament, a sheath made of aromatic polyamide short fibers, a filament wound with K short fibers, p is uniformly conjugated by a tangled structure. The yarn made from this composite spun takes advantage of the heat regeneration property, which is a major feature of aromatic polyamide, and exhibits extremely high heat resistance. In addition, as shown in Table 2, the composite spun yarn has extremely superior uniformity and yarn strength compared to untwisted spun yarn made only of aromatic and aromatic polyamide short fibers without inserting filaments. It has great advantages such as being high and having fewer thread breaks during stretch cutting. On the other hand, since the amount of expensive aromatic polyamide used is reduced, it has the advantage of reducing costs.

In addition, as a result of making a fabric using this composite spun yarn, the sheath of the spun yarn is mainly made of aromatic polyamide with a thin single yarn denier, and the core is made of polyester with a thick table denier, resulting in a soft spun touch. A fabric with a rough texture and stiffness was obtained. Therefore, when sports clothing was made using the woven fabric, friction melting occurred due to the heat resistance of the aromatic polyamide, resulting in durable sports clothing.

[Brief explanation of the drawing]

Figure 1 is a process diagram showing a process example of the conventional no-twist spinning method;
FIG. 2 is a process side view showing an example of the process of carrying out the method of the present invention. 2...Feeding roller 3...Tension roller 4...Air nozzle size 2

Claims (1)

[Claims] 1. Short fiber fleece is produced by cutting a tow consisting of continuous long fibers between a feeding roller and a pair of tension cutting rollers that rotate at a circumferential speed faster than the circumferential speed of the feeding roller. Then, in the method for producing spun yarn with high efficiency by subjecting the short fiber fleece to a fluid treatment, another yarn is supplied under high tension to the chapter cutting roller to separate the short fiber fleece. A method for producing a composite spun yarn, characterized in that a fluid treatment is performed while maintaining a tensioned state of the sheep cutting roller supply system. 2. *The tension of the yarn fed to the cutter is 0.
71! 2. A method according to claim 1, in the range of /de to 1.5 t/d@.