JPS59116435A - Production of composite 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 The present invention has a complex structure having heathering and fluff caused by uneven thickness, uneven crimp, uneven length between partial single fibers, uneven dyeing, or color difference. It successfully covered the unstable physical properties that occur from thread scales and such structures. The present invention provides a method for manufacturing a natural fiber-like composite yarn at a reasonably low cost.

Multi-filament yarns having stretched portions and unstretched portions alternately and randomly in the length direction of the yarn are known, and it is also known to false twist them.

However, the yarn obtained in this way has low strength and has a lot of fuzz because it contains a low orientation part.

Therefore, not only is the weaving process passability poor, but also the tear strength of the fabric obtained using such yarn is low, and this tendency is particularly noticeable when treated with an alkali.

In addition, there is a known method that takes advantage of this drawback and obtains a spun processed yarn in which the yarn is fluffed by a fluid treatment after drawing and false twisting, but there is a limit to the number of fluffs due to anti-pilling properties. It is a far cry from spun yarn.

On the other hand, a method in which two or more types of highly oriented undrawn yarns are used to draw and simultaneously false-twist is known.

It has the disadvantage of producing processed yarn that lacks the uniformity and warmth characteristic of synthetic fibers.

The combined invention improves the defects of Koshira and uses J fiber as a starting point, but has the irregularity and warmth of natural fiber,
The object of the present invention is to provide a method for rationally producing processed yarn with no problems in physical properties by compositing it.

The present invention has a first-order configuration.

(1) Multi-filament yarns and highly oriented undrawn multi-filament yarns having drawn portions and undrawn portions alternately and randomly in the length direction of the yarns are aligned and false-twisted at the same time as drawing to create a composite. A method for producing textured yarn, and a multifilament yarn having stretched portions and highly oriented undrawn portions alternately and randomly in the length direction of the yarn by stretching highly oriented undrawn yarn at a natural stretching ratio. This is a method in which a composite textured yarn is obtained by subsequently drawing together another highly oriented undrawn multi-filament yarn and performing drawing and simultaneous false twisting.

To explain in more detail, the multifilament yarn (A) has stretched portions and unstretched portions alternately and randomly in the length direction of the yarn.
is obtained by stretching undrawn yarn under conditions below the natural draw ratio.

If this yarn (A) and the highly oriented unstretched multi-filament yarn (B) are aligned and subjected to simultaneous drawing and false twisting, the yarn (A) will be formed as a model as shown in FIG. Unstretched portion 1 and yarn (B)
In the composite yarn portion 4 where the two yarns are adjacent to each other, two highly oriented undrawn yarns are pulled together and subjected to simultaneous stretching and false twisting. (A) The yarn is present in a relatively outer layer of the composite yarn.

On the other hand, in the composite yarn portion 5 where the drawn portion of the yarn (A) and the yarn (E) are adjacent to each other, the drawn yarn and the highly oriented undrawn yarn are aligned to perform simultaneous stretching and false twisting. As expected, there is a difference in yarn length between the two, and this time, conversely, the yarn (B) is
The yarn structure is such that it covers the yarn (A).

Due to this structure, irregularity in the longitudinal direction of the composite yarn results in an appearance similar to that of natural fibers and 9 partial yarn length differences. A warm texture with a fluffy feel and a soft touch is obtained, and since the yarn (B) is originally uniform in the length direction and is uniformly stretched and false twisted, it has a 1 strength retention rate. The properties also become better and the physical properties become stable.

In this case, the two threads to be combined are one with different dyeing characteristics, and one with different dyeing characteristics.
For example, if nylon, polyester, or cationically dyeable polyester is used, yarns of the same type will randomly appear on the outer layer of the composite yarn, enter the inner layer, or mix evenly with other yarns, resulting in complex yarns. It has a heathered appearance, giving it a natural appearance similar to that of natural fibers.

However, if the degree of orientation of the undrawn portion of the yarn (A) is too low, the physical properties will be unstable and it will not be able to withstand use. It loses its thread-like characteristics.

On the other hand, it is desirable that the degree of orientation of the yarn (B) is high in view of the role of stabilizing the physical properties of the composite yarn, but if it is too high, the difference with the yarn (A) will become too large and the degree of orientation of the composite yarn will be There is no unity, and the heathering becomes poor.

Therefore, from the experimental results of the present inventors, the degree of orientation of the highly oriented undrawn portion of yarn (A) is 15 to 3 [1, and the degree of orientation of yarn (B) is 15 to 3 [1].
The degree of orientation is preferably in the range of 0 to 80-6.

Using a yarn having stretched portions and highly oriented unstretched portions alternately in the length direction of the yarn, drawing and simultaneous false twisting is performed, first, fluid treatment is performed, and high temperature heat treatment is performed using a false twisting heater. A method is known in which the brittle unrolled portion is fluffed and the entire yarn is entangled. In this case, as the yarn to be subjected to drawing and simultaneous false twisting, a yarn having stretched portions and highly oriented undrawn portions alternately in the longitudinal direction of the yarn and a highly oriented undrawn yarn that is uniform in the longitudinal direction are aligned. Even if the yarn is fed using the same method, a fluffy entangled yarn can be obtained using the same principle, and the same effects as described above, namely, a partial yarn length difference, a smooth grain, and stability in physical properties can be obtained.

In addition, in this case, if cationic dyeable polyester is used as the yarn having alternately stretched parts and (highly oriented) unstretched parts, even if it becomes pilled due to its low strength, it will easily fall off. 'It has excellent anti-pilling properties, and by increasing the number of fluffs by increasing the temperature of the false-twisting heater, it creates a spun yarn-like touch due to the abundance of fluffs and a composite yarn with different dyeing characteristics. Therefore, it is possible to obtain a composite yarn that has a natural unique color effect and has no problem with anti-build properties.

In this case, after drawing the highly oriented undrawn yarn under drawing conditions below the natural draw ratio to obtain a multifilament yarn having drawn portions and highly oriented undrawn portions alternately and randomly in the length direction of the yarn, Subsequently, if the fibers are aligned with another uniform highly oriented undrawn yarn in the length direction and false-twisted at the same time as stretching, it is reasonable to be able to perform stretching and false-twisting in one step.

To explain this using the device model shown in Figure 2,
The highly oriented undrawn yarn A is stretched in the stretching zone formed by the feed rollers 12 and 14 under conditions below the natural stretching ratio, and becomes a yarn having stretched portions and undrawn portions alternately and randomly in the longitudinal direction of the yarn. The fibers are aligned with the highly oriented undrawn yarn B supplied separately from a feed roller 14, and drawn and false twisted in a false twisting zone composed of the feed roller 14, draw roller 8, heater 6, and false twister 7.

Either it is wound up in the winder 11 as it is, or it is fluffed with the liquid treatment nozzle 9 and entangled before being wound up.

Here, the polymer dyeing characteristics of the supplied yarns A and B.

It is even better if the degree of orientation is limited to the range mentioned above.

By carrying out simultaneous stretching and false twisting under conditions where the stretching ratio during simultaneous stretching and false twisting exceeds the natural stretching ratio of highly oriented undrawn yarns that are uniform in the length direction, similar threads can obtain uniform and high orientation density.
The process is stable and the physical properties are also stable.

The temperature of the false twisting heater is not particularly limited, but if you want to obtain a yarn with little fuzz, it is preferable to use a temperature below the softening point, and if you want rich fuzz, it is preferable to use a temperature in the high temperature range close to the softening point. Bye. The number of false twists is not particularly limited.

The air entanglement treatment is not necessary, but it is better to perform it if you want a product that has good passability and good heatherability in subsequent steps. In particular, when it is desired to obtain a yarn with a lot of fuzz, it is essential because more fuzz is generated due to the vibration energy during the air entanglement treatment.

As described above, by using the method of the present invention, it is possible to eliminate uneven yarn thickness in the longitudinal direction, uneven fineness between single fibers, and dyeing degree differences due to complex structures caused by partial yarn length differences. It is possible to obtain a heathered processed yarn that has a warmth similar to that of natural fibers, has stable physical properties, and can be produced rationally and at low cost.

Example A 150 tenier, 36 filament highly oriented undrawn cationic dyeable polyester yarn with an orientation degree of 19.8xjO and a 150 denier yarn with an orientation degree of 35 x 10''.
Using regular polyester with 36 filaments, the second
Using the apparatus shown in the figure, cationic dyeable polyester is fed from the feed roller 12 and regular polyester is fed from the feed roller 14 and processed under the following conditions to obtain a 160 denier, 72 filament fluffy composite yarn. Ta.

Processing speed 400 m/min Stretching ratio r, 1.15 (peripheral speed of feed roller 5/peripheral speed of feed roller 6) Stretching pin temperature 65°C Stretching distance 5Qmm Stretching ratio r, 1.7 (peripheral speed of feed roller 8) / peripheral speed of feed roller 5) Heater temperature 250'a Number of false twists 2.300 T/rn Air treatment nozzle diameter 09φ x 2 holes Air treatment pressure 3 threads/, f Winding tension 25 g/strand Obtained yarn When I knitted it into a tube shape and dyed it with blue cationic dye, only the cationically dyeable polyester was dyed, leaving the regular polyester white, giving it a warm feel due to its heathered feel and abundant fluff.

Moreover, I was able to obtain a wool-like product that was heathered (・).

In addition, the strength of the processed yarn is at a problematic level of 2&/d even though low-strength cationic dyeable polyester is stretched at a ratio lower than the natural stretching ratio. Pillability was also within the acceptable range.

In the above example, when no fluid treatment was performed, the number of fluffs was extremely small and was comparable to rough heather. Furthermore, when the yarn was processed at a draw ratio r of 1.6 times, which is lower than the natural draw ratio of regular polyester, the strength of the processed yarn obtained was low and it was not durable enough for use.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the state of the yarn immediately before entering the stretching and simultaneous false-twisting process in the present invention. FIG. 2 is a diagram showing an embodiment of the method for manufacturing composite textured yarn according to the present invention. A: Highly oriented undrawn yarn subjected to non-uniform stretching B: Highly oriented undrawn yarn uniform in the longitudinal direction 1: Low oriented portion in yarn A 2: Highly oriented portion drawn in yarn A 6 Double false twist Heater 7: False twist spindle 8, :)"o-o 5
9: Air entangling nozzle 12: Feed roller ni 16
:Stretching bin 14: Draw roller

Claims (5)

[Claims] (1) A method of producing composite textured yarn by false-twisting a stretched portion and an unstretched portion in the length direction of the yarn. (2) The manufacturing method according to claim 1, in which the multi-filament yarn (A) and the multi-filament yarn (B) are yarns having different dyeing properties. (3) The manufacturing method according to claim 1, wherein the multifilar thread (A) is a cationically dyeable polyester, and the multifilament thread (B) is a normal polyester. (4) A polygonal yarn (A) having stretched portions with an orientation degree of 80 x 10 or more and Higashi-nobu stretched portions with an orientation degree in the range of 15 to 30 x 10 at random, and The manufacturing method according to claims 11 to (3), using highly oriented undrawn yarn (B) having a diameter of 80 x 10 . (5) The manufacturing method according to claims (1) to (4), in which a fluid treatment is performed after the false twisting process to fluff the yarn and to induce entanglement between single fibers. (6j After drawing the highly oriented undrawn yarn at a draw ratio equal to or lower than the natural draw ratio to obtain a multifilament yarn having drawn portions and highly oriented undrawn portions alternately and randomly in the length direction of the yarn, Subsequently, another highly oriented undrawn fiber 1. The manufacturing method according to claims 2 to 5, in which drawing and simultaneous false-twisting is performed while aligning with the laid yarn. (Force during drawing and simultaneous false-twisting The drawing ratio conditions are undrawn yarn (E
) Claims Nos. (1) to (6) exceeding the natural stretching ratio of
The manufacturing method described in ).