JPS62191532A - Production of bulky 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 (Industrial Application Field) The present invention relates to a method for producing a bulky textured yarn which has excellent bulkiness when made into a fabric and has good passability during weaving and weaving and its preparation process.

(Prior Art) Conventionally, textured yarns obtained by false twisting have been widely used as bulky textured yarns because uniform p/1 shrinkage can be obtained through simple operations. However, since this false-twisted yarn has bulkiness and elasticity, the bulkiness of the fabric is significantly lowered by the tension during knitting and weaving compared to the condition of the textured yarn itself, that is, under no tension.

It has the disadvantage that it does not have sufficient bulk compared to fabrics obtained from natural spun yarns such as wool. On the other hand, bulky yarn processed by fluid jet treatment has no elasticity.

It has good dimensional stability and is excellent as a bulky textured yarn, but in order to emphasize its bulkiness, the overfeed rate supplied to the fluid injection nozzle must be increased. However, the larger the overfeed rate is, the rougher the loops formed in the processed yarn become, and the unwinding properties of the yarn are poorer, and in extreme cases, the yarn may not be able to be unraveled better than cheese. For this reason.

To enable industrial production, the overfeed rate must be reduced, and therefore the bulkiness has to be limited, which is a drawback.

(Problems to be Solved by the Invention) The present invention eliminates the drawbacks of the conventional methods as described above, and its purpose is to provide excellent bulk when made into a fabric, and to provide a fabric with excellent bulk during weaving and weaving. The object of the present invention is to produce a bulky textured yarn that has good permeability in the preparation process and the like.

(Means for Solving the Problems) That is, the present invention uses a highly shrinkable multifilament yarn (A) with a hot water shrinkage rate of 30% or more and a multifilament yarn (B) with a breaking elongation of 35% or less. Aligned.

The high shrinkage multifilament yarn (A) is supplied to the fluid injection nozzle under overfeed as a core yarn.
A low shrinkage multifilament yarn (C) having a hot water shrinkage rate difference of 20% or more with the core yarn is supplied as a sheath yarn to the fluid jet nozzle at a higher overfeed rate than the core yarn, and subjected to fluid disturbance treatment. The gist of this paper is a method for producing bulky textured yarn.

The present invention will be explained in detail below.

First, in the method of the present invention, highly shrinkable multifilament A having a hot water shrinkage rate of 30% or more and multifilament yarn B having a breaking elongation of 35% or less are aligned.

It is fed as a core yarn to the fluid injection nozzle under overfeed.

The high shrinkage multifilament A used here is.

The hot water shrinkage rate must be 30% or more, and if the hot water shrinkage rate is less than 30%, a sufficient bulking effect cannot be obtained even when hot water is used for dyeing after fabrication. In addition.

This high shrinkage multifilament yarn has a birefringence of 1
It is preferable to use highly oriented undrawn polyester yarn of 5X10- to 80X10-3. In other words, if the birefringence of the highly oriented undrawn polyester yarn is less than 15X10-', the orientation will be too low and the hot water shrinkage rate will be less than 30%9. This is because it tends to cause spots, and on the other hand, if it exceeds 80×10 4 , the hot water shrinkage rate tends to decrease due to high orientation.

The multifilament yarn B used in alignment with the high shrinkage multifilament yarn A has an elongation at break of 35% or less, and an elongation at break of 2 exceeding 35%.

The textured yarn is stretched by the tension applied during weaving and weaving of the resulting bulky textured yarn, and most of the formed loops and entanglements disappear.

The high shrinkage multifilament yarn A and the multifilament yarn B are fed in parallel, but otherwise, if the high shrinkage multifilament yarn A is long, the hot water shrinkage effect of the high shrinkage multifilament yarn A will be reduced. not working enough;
Conversely, if the multifilament yarn B is long, the highly shrinkable multifilament yarn A will be stretched.

In addition, when the high shrinkage multifilament yarn A and multifilament yarn B are aligned and supplied as a core yarn, the O/B feed rate is as follows: -5 〜 It is preferable to set it as 1% to 15%.

In the present invention, a low shrinkage multifilament yarn C having a hot water shrinkage rate difference of 20% or more with the high shrinkage multifilament yarn A is supplied as a sheath yarn to the fluid injection nozzle at a higher overfeed rate than the core yarn, Perform fluid disturbance treatment. That is, the low-shrinkage multifilament yarn C that becomes the sheath yarn has a hot water shrinkage rate difference of 20% or more with the high-shrinkage multifilament yarn A, and if it is less than 20%, the yarn length difference due to the shrinkage difference, that is, the bulkiness is insufficient. Otherwise, the effects of the present invention cannot be achieved.

In addition, it is necessary to supply the low shrinkage multifilament yarn C with a higher overfeed rate than that of the core yarn, but if the difference in overfeed rate with the core yarn is too small, the low shrinkage multifilament yarn Since C is difficult to appear on the entire outside of the textured yarn and the bulking effect is reduced, it is preferable to make the overfeed rate 5% or more higher than the core yarn overfeed rate.

The core yarn and sheath yarn supplied in this manner are subjected to a fluid disturbance treatment by injecting fluid such as compressed air using a jet nozzle such as an interlace nozzle or a taslan nozzle. In this way, the loops and entanglements are not lost even under the tensile force during weaving and weaving, and a processed yarn that becomes sufficiently bulky through hot water shrinkage can be obtained. Therefore, the yarn processed by the method of the present invention does not need to have a high overfeed rate that makes it difficult to unwind from the rolled cheese, and has good processability without worrying about loops getting caught. be.

Hereinafter, one method of the present invention will be explained based on the drawings.

FIG. 1 is a process schematic diagram showing an example of the manufacturing process of the method of the present invention, in which the high shrinkage multifilament yarn A drawn out from the cheese 1 is combined with the multifilament yarn B drawn out from the pirn 2 by the feed roller 4. The fibers are pulled together and fed as a core thread through a feed roller 4, a guide 6, and a fluid injection nozzle 7 under overfeed. On the other hand, the low shrinkage multifilament yarn C drawn out from the pirn 3 is as follows.

The sheath yarn is supplied to the fluid jet nozzle 7 through the feed roller 5 at a higher overfeed rate than the core yarn, subjected to fluid agitation treatment by the fluid jet nozzle 7 along with the core yarn, passed through the delivery roller 8, and packaged by the winding roller 9. 1
It is rolled up to 0.

High shrinkage multifilament yarn A, multifilament yarn B, and low shrinkage multifilament yarn C in the method of the present invention include multifilament yarns of thermoplastic synthetic fibers such as polyester and nylon, recycled fibers such as rayon and acetate, and semi-synthetic fibers. It is possible to use any multifilament yarn, such as drawn yarn or highly oriented undrawn yarn. In addition, the hot water shrinkage rate is JIS-L-1
This is a value measured according to 090.

(Function) As described above, in the method of the present invention, highly shrinkable multifilament yarn A with a hot water shrinkage rate of 30% or more and multifilament yarn B with a breaking elongation of 35% or less are aligned and overfed as core yarns. Therefore, as in the processed yarn before hot water treatment in Figure 2 (a), the high shrinkage multifilament yarn A and the multifilament yarn B are bundled with approximately the same length, and therefore are highly elongated with low stress. Even if the multifilament yarn A is highly shrinkable, the presence of the multifilament yarn B prevents it from being stretched by the tension during the illumination process during weaving and weaving. Moreover, the low shrinkage multifilament yarn C, which has a hot water shrinkage rate difference of 20% or more with the high shrinkage multifilament yarn A, is supplied as the sheath yarn at a higher overfeed rate than the core yarn.

The low shrinkage multifilament yarn C is intertwined with the core yarn as a sheath yarn with relatively small loops and slack, and has good processability.

Furthermore, since the method of the present invention has the above-mentioned structure, 1. the bulky textured yarn obtained by the method of the present invention has a high shrinkage multifilament yarn A that is shortened due to shrinkage, as shown in FIG. 2 (b) after hot water treatment. As a result, multifilament yarn B forms loops and slack.

Furthermore, the low shrinkage multifilament yarn C forms larger loops and slack than the multifilament yarn B, and becomes bulkier than the processed yarn before hot water treatment.

=9- (Example) The following two methods of the present invention will be specifically explained with reference to Examples.

In addition, the fluff value in the examples is JISL-1095
-7,22,2B method, using F-index tester (manufactured by Shikishimabo Co., Ltd.) as a measuring device, is the value of the number of loop fuzz of 0.5 n or more per 1 m of yarn. Moreover, the bulk height is a value measured as follows. That is, the sample yarn was twisted 2,500/g times per meter (D: yarn denier) under a load of 0.5 g/d, and 5 cm of this yarn was divided into 10 equal parts. Measure the diameter using a microscope and find the average value.

In this way, 20 average values are measured per yarn, and these average values are determined to be the diameter (μm) of the sample. The value is the value obtained by dividing the diameter of this sample by the diameter (μM) of a circular monofilament having the same denier as the yarn of the sample and multiplying it by 100.

Example: Polyethylene with hot water shrinkage rate of 63% and birefringence of 50 x 10-' = 10-nterephthalate highly oriented undrawn yarn 110 d/36
Polyethylene terephthalate drawn yarns 75d/36f (semi-dull) having f and elongation at break of 37.6% were drawn together to form a core yarn according to the process shown in FIG. 1, and fed to a fluid injection nozzle at an overfeed rate of 3%, while Hot water shrinkage rate 11.0%
polyethylene terephthalate drawn yarn 75d/72f
Overfeed rate: 18% using (semidull) as sheath thread
supplying said fluid injection nozzle with a pneumatic cuff of the nozzle;
Fluid disturbance processing at 0 kg/cJ, delivery roller speed 2
20m/min, 141-handling overfeed rate 1
．． A bulky textured yarn was obtained by winding the yarn at 1% by the method of the present invention.

The fluff value and bulkiness of the obtained bulky processed yarn before and after hot water treatment were measured, and the results shown in Table 1 were obtained.

As is clear from Table 1, both the fluff value and the bulkiness of the bulky processed yarn produced by the method of the present invention change significantly after the hot water treatment. In addition, according to past experience, it is known that if the fuzz value is approximately 250 or more, unraveling will be poor, although it depends on the fineness of the single yarn.

The fluff value of the bulky processed yarn obtained by the method of the present invention was less than that, and the processability during weaving, knitting, etc. was good.

This bulky textured yarn was woven into a plain structure with a warp density of 51 threads/2.54 cm and a weft density of 47 threads/2.540, and was subjected to a normal polyester dyeing and finishing treatment, resulting in a shrunk single yarn fineness of approximately 1.
A very bulky fabric with dense denier loops was obtained.

(Effects of the Invention) As described above, the two methods of the present invention align specific high shrinkage multifilament yarns and multifilament yarns to form a core yarn, while overfeeding specific low shrinkage multifilament yarns as a sheath yarn. death.

Since the yarn is subjected to fluid agitation treatment, the bulky textured yarn obtained by the method of the present invention forms loops and slack in the core-sheath structure within a range that does not make handling during weaving difficult, and is resistant to tension during weaving. Loops and slack never disappear. In addition, since the bulky processed yarn produced by the method of the present invention has the above-mentioned structure, there is a high degree of difference in hot water shrinkage rate between the core yarn and the sheath yarn. Ba.

The bulkiness of the obtained fabric after dyeing and finishing can realize the bulkiness in a region that cannot be knitted or woven with yarns having a normal core-sheath structure.

[Brief explanation of drawings]

Fig. 1 is a process schematic diagram showing an example of the manufacturing process of the method of the present invention, and Fig. 2 is a schematic diagram showing an example of bulky processed yarn obtained by the method of the present invention, and (a) of the same figure is a diagram showing an example of the bulky processed yarn obtained by the method of the present invention. , and (b) is a schematic diagram after hot water treatment. A; High shrinkage multifilament yarn B; Multifilament yarn C; Low shrinkage multifilament yarn 4.5; Feed roller 7: Fluid injection nozzle 8; Delivery roller

Claims (3)

[Claims] (1) A highly shrinkable multifilament yarn (A) with a hot water shrinkage rate of 30% or more and a multifilament yarn (B) with a breaking elongation of 35% or less are aligned and used as a core yarn under overfeed with a fluid jet nozzle. and a low shrinkage multifilament yarn (C) having a hot water shrinkage rate difference of 20% or more with the high shrinkage multifilament yarn (A) as a sheath yarn,
A method for producing a bulky textured yarn, characterized in that the yarn is supplied to the fluid jet nozzle at an overfeed rate higher than that of the core yarn, and subjected to fluid agitation treatment. (2) High shrinkage multifilament yarn (A) has birefringence of 15
The method for producing a bulky textured yarn according to claim 1, which is a highly oriented undrawn polyester yarn having a diameter of x10^-^3 to 80 x 10^-^3. (3) The method for producing a bulky textured yarn according to claim 1 or 2, wherein the overfeed rate of the sheath yarn is 5% or more higher than the overfeed rate of the core yarn.