JPS62177241A - Production of interlaced crimp 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 has excellent bulkiness, spun yarn-like cohesiveness and texture,
and a method for producing a novel textured yarn with excellent elasticity.

More specifically, some of the single fibers that make up the T yarn are intertwined with other single fibers in a loose state, and at the same time, on top of the intertwined structure, there is a wavy, curled, or looped crimped structure. The present invention relates to a method for producing an intertwined crimped yarn having the following.

(Prior art) In the past, many efforts have been made to develop yarns with a texture similar to spun yarn using filament processing technology. This creates slack between the single fibers, which in turn creates kinks and loops on the side of the yarn.

It is widely practiced to make the fibers protrude and intertwine the single fibers to maintain structural bulkiness such as sagging, kinks, and loops. However, this structural bulkiness can be improved by weaving 9 knits,
In order to maintain it without being destroyed during the dyeing and finishing process, it must be provided with extremely high entangling properties. On the other hand, convergence through intertwining is an effective means to eliminate the stiffness seen in ordinary crimped yarns.
In other words, the higher the υ bundling property, the closer the feel is to the twisted structure of T-spun yarn. was inhibited, and an abnormal resistance to bending appeared, exhibiting characteristics completely different from the resistance to bending due to the twisted structure of spun yarn.

The texture becomes extremely loose, and is completely different from the texture of woven and knitted fabrics using spun yarn.

As described above, it has been extremely difficult to satisfy the necessary properties of good focusing or maintaining bulkiness, and a texture without looseness, simply by interlacing and focusing.

(Problems to be Solved by the Invention) In view of the above-mentioned points, the object of the present invention is to provide a fabric that has good cohesiveness and bulkiness retention performance, as well as a flexible texture and yarn structure similar to spun yarn. It is an object of the present invention to provide a method for producing an intertwined crimped yarn, which makes it possible to produce a filament-processed yarn by a filament processing method using an entangling treatment technique.

(Means to Solve the Problem) The above purpose is to provide both thermoplastic multifilament A and thermoplastic multifilament B, which have been crimped in advance, at a feed rate of multifilament B. ,
The feeding speed of the multifilament A is increased by 10% or more, and the multifilament A is supplied to a fluid entangling treatment device and subjected to fluid entangling treatment to form an entangled condensed part having a total length of 20% or more with respect to the total yarn length. This can be achieved by a method for producing an intertwined crimped yarn, which is characterized in that the yarn is subsequently crimped.

In the above method, it is preferable that the crimping process after the formation of the entangled convergence region is a temporary twisting process, and more preferably, the temporary twisting coefficient K of the temporary twisting process is expressed by the following formula: This is a method for producing interlaced crimped yarn that satisfies the following.

The temporary υ coefficient is ≧30,000 (however, the temporary twist coefficient is 1 temporary υ number x √ yarn fineness) (effect) The method for manufacturing the intertwined crimped yarn of the present invention will be explained in more detail based on the following two drawings etc. do.

FIG. 1 is a process diagram showing one embodiment of the method for producing an intertwined crimped yarn of the present invention, in which 1 is a thermoplastic multifilament A that has been crimped in advance, and 2 is a thermoplastic multifilament B that has been crimped in advance. This is a supply package.

Multifilaments A and B are passed through guide 6.

Through feed rollers 4 and 5, high speed fluid processing device 7
The bulky intertwined two-layer structured yarn 23 is first obtained by the first delivery roller 8.

Subsequently, this interlaced yarn is subjected to crimping, and FIG. 1 particularly shows a schematic diagram of the case where a false twisting method is used as the crimping.

In addition, at this time, the interlacing process and the crimp process may be separated. That is, after passing through the interlacing treatment process up to the first delivery roller 8, it may be once wound up and then subjected to the crimping process again.

The crimp process at this time may be performed using other means such as push-in process, p-knit/denit process, etc., but due to the fineness of the crimp,
False twisting is most desirable. In the case of false twisting, when the twist coefficient K is 30,000 or more, double twist appears in the false twisting heating region. As a result, wavy group crimp remains even in the unentangled portion, which is more preferable.

Further, the fluid device used for the entanglement process may be of either a rectified flow type or a turbulent flow type as long as it can provide strong entanglement.

The yarn obtained by the method for producing intertwined crimped yarn of the present invention will be explained below.

First of all, one of the important points in the yarn obtained by the present invention is that depending on the difference in feeding speed, the yarn can be of the same type or the same type.

The point is that the multifilaments of different types are threads exhibiting a two-layer structure in which the threads are intertwined and bundled with a difference in thread length of 10% or more.

To explain this with reference to FIG. 2, since the multifilament A25 intertwines with the thermoplastic multifilament B26 with slack, B26 becomes the core yarn and A25 becomes the surface yarn, making it possible to obtain a bulky textured yarn as a whole.
In addition, due to the difference in yarn length, the tensile force acts weakly on the slack single fibers of multifilament A25.
This is effective for maintaining bulkiness. At this time, by making a large difference in yarn length between the nine filaments.

A yarn with many protruding loops and ribs and an appearance almost similar to fluff in spun yarn can be obtained.

Furthermore, the second important point in the yarn obtained by the present invention is that the total length of the entangled portions (entangled convergence portions) is
The point is that the ratio is at least 20 inches to the yarn length. This is because if the single fibers are intertwined with each other and there are few intertwined bundles, the monowoven or knitted fabric will remain dry and cannot express the texture of spun yarn at all. The higher the total length of the intertwined parts), the better. From this meaning, the total length of the intertwined parts is 30
% or more. Such an intertwined part is the filament A25 and filament B shown in FIG.
26 are intertwined with each other and the two are tightly intertwined
This is what it says. A third important point is that in the interlaced and condensed portion, most of the constituent single fibers are integrated and exhibit a wavy or coiled crimped structure. Due to the presence of this crimp, the apparent bending rigidity decreases even in the tightly intertwined portions. That is,
The light touch is similar to that of spun yarn, and the texture to the grip is much more flexible than simply interlaced bundled yarn, making it a woven or knitted fabric with excellent repellency and elasticity. You can get it. The fourth important point is that
The filament A has fine crimps, and such fine crimps are different from wavy or coiled crimps formed by integrating the entire yarn. It means crimping. This fine crimp has a remarkable effect on obtaining a soft texture and good cohesiveness.

Such fine crimp can be obtained by subjecting the multifilament A to a crimp process in advance before the interlacing process.

Furthermore, it is preferable that the filament A protrudes in the shape of a rib, a snarl, or a loop, and in this structure, as described above, the multifilament A is particularly subjected to a temporary twisting process as a crimp process before the p-entangling process. You can get more out of it by keeping it.

Furthermore, the special structured yarn obtained by the method of the present invention is
After this, it can be twisted once more and used for woven or knitted fabrics. The effect of additional twisting is to impart convergence.

It is desirable that the amount is such that the bulkiness is not impaired.

However, even if the number of additional twists is large, it is structurally different from the straight-looking residual untwisted yarn of pre-twisted ununtwisted yarn, which is twisted before false twisting, and has a soft texture similar to that of spun yarn. is maintained.

Note that the material that can be used in the present invention is preferably a thermoplastic synthetic fiber such as polyester or nylon that can be effectively crimped, but there are no particular restrictions on the filament used as the thread that appears on the thread surface. .

(Example) Next, nine features of the present invention will be explained in more detail with reference to Examples and Comparative Examples.

Note that the intertwined portion ratio is the ratio of the total length of the intertwined portions to the yarn length, and is measured as follows.

First, the average number N of intertwined parts per unit length under a tension of 0.1 g/D is counted. Subsequently, 0.02g/D
A pin is inserted into the unentangled portion under a tension of 0.1 g/D, and the pin is moved back and forth in the longitudinal direction of the yarn to determine the average length sl of the unentangled portion. From N and S obtained in this way, the interlaced portion ratio is determined by the following formula.

1 (m) Example 1 Table 1 is for multifilaments A and B.

This is an example using polyester (PET). Hal to 3 are comparative examples in which both filaments are raw silk (I)
, +4a4. 5 is an example of the present invention in which the multifilament A is a woolly yarn that has been completely false twisted. For confounding treatment.

The yarn was entangled using a rectifying type entangling nozzle that ejected a high-speed fluid in a direction perpendicular to the yarn in a direction opposite to the yarn by applying air at 5 kg/cIn2 and 0 pressure. The intertwined parts exist somewhat intermittently, and the ratio of the total length of the intertwined parts at this time (before being subjected to temporary twisting) to the yarn length.

In Table 1, it is shown as an intermediate confounding ratio.

These yarns were crimped, and false twisting was used for the crimping. The conditions are as follows.

Processing speed 100m/mm Processing temperature 215℃ Processing feed rate -3 to -2% Number of temporary twists 2600 T/m (Twist coefficient K -31
840) The ratio of residual entangled portions after false twisting is as shown in Table 1. This thread is made of polyester 75D-36
Fabrics were woven using f 200'l'/m sweet weft yarn as warp yarns, and the texture and feel were examined after finishing.

As a result, in N11, the loose feeling peculiar to the temporary twisted yarn remained, and the texture was far from that of a spun yarn. In case 2 with a yarn length difference of 10, the stiffness remained a little, but a feeling of convergence similar to moxibustion or spun yarn appeared, and the texture was a little soft.
The fabric with a long yarn length difference of floor 6 had loop-shaped protruding filaments on the surface of the fabric and had a texture similar to spun yarn, but it could not be said to have a sufficient texture and had a slightly rough and hard feel. Also, the convergence was unsatisfactory.

On the other hand, leveling parts 4 and 5 according to the present invention use Welly type filament A on the oversupply side, and compared to those using raw silk, the proportion of intertwined parts that break during temporary twisting is significantly lower. It was noticeable that the size was small. This is because the presence of crimps in the supplied woolly yarn causes displacement of the single fibers during temporary twisting at the once intertwined portion.

This is thought to be due to the remaining entangled structure. These yarns had excellent cohesiveness, and especially due to the fine crimp structure of filament A, the texture of the fabric was also good.

(Effects of the Invention) According to the present invention as described above, there is provided a method for producing an intertwined crimped yarn that has good cohesiveness and bulkiness retention performance and has a soft texture and yarn structure like a spun yarn; provided.

[Brief explanation of drawings]

FIG. 1 is a process diagram showing one embodiment of the method of the present invention! FIG. 2 is a yarn appearance model diagram illustrating the structure of the intertwined crimped yarn obtained by the method of the present invention. 1.2: Supply multifilament 7: Fluid processing device 9: Heater 10: False twist heating device 25: Multifilament A 26: Multifilament B
Toshi Co., Ltd. +2

Claims (3)

[Claims] (1) Both yarns of thermoplastic multifilament A and thermoplastic multifilament B that have been crimped in advance are fed at a rate of 10% or more of the feed rate of multifilament A relative to the feed rate of multifilament B. The yarn is enlarged and supplied to a fluid entanglement processing device to be subjected to fluid entanglement treatment to form an entangled bundle having a total length of 20% or more with respect to the total yarn length, and subsequently, the yarn is crimped. 1. A method for producing an interlaced crimped yarn. (2) The method for producing an intertwined crimped yarn according to claim (1), wherein the crimping process after the formation of the intertwined bundled portion is temporary twisting. (3) The method for producing an intertwined crimped yarn according to claim (2), wherein the temporary twisting coefficient K of the temporary twisting process satisfies the following formula. Temporary twisting coefficient K≧30,000 (However, temporary twisting coefficient K = number of temporary twists x √ yarn fineness)