JPH086220B2 - Manufacturing method of high-altitude alternating twisted yarn - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for producing a sublime alternating twisted yarn having SZ alternating twist that is stable against external force.

(Prior Art) Conventionally, there is known a method for manufacturing a yarn in which two yarns provided with alternate twists in the longitudinal direction of the yarns are entangled with each other and an SZ alternate twist is formed by the torque (for example, JP 51-2635
No. 7).

(Problems to be Solved by the Invention) However, the alternate twisted yarn obtained by the above method has a drawback that the alternate twist is easily lost by the tension received in the weaving / knitting process or the like.

The present invention solves the above-mentioned conventional drawbacks, and an object thereof is a method for producing a sublime alternating twisted yarn in which a stable alternate twisted pattern is maintained even when tension is applied in a weaving / knitting process or the like. To provide.

That is, in the present invention, when two yarns are provided with SZ alternating twists and two yarns provided with SZ alternating twists are combined to produce a yarn having SZ alternate twists, A yarn containing filaments having different heat shrinkage rates is used as at least one yarn, and this yarn is subjected to relaxation heat treatment, and then the relaxation heat treated yarn is provided with alternate twists, and another yarn is separately provided. Alternate twist is applied to the above, and after that, the above-mentioned two yarns to which the alternate twist is applied are added together without being once wound to form an SZ alternate upper twist by the action of the torque of both yarns. The gist is a method of producing a sublime alternating twisted yarn.

 Hereinafter, the present invention will be described in detail.

First, in the present invention, SZ alternating twists are applied to two yarns respectively, and two yarns to which SZ alternating twists are applied are combined to have an SZ alternate upper twist by the torque of each yarn. When manufacturing a yarn, a yarn containing filaments having different heat shrinkages in at least one yarn, for example, a mixed yarn of filaments having different heat shrinkages, is used and subjected to a relaxation heat treatment. This relaxation heat treatment causes a yarn length difference between filaments having a high heat shrinkage rate (hereinafter referred to as high shrinkage filaments) and filaments having a low heat shrinkage rate (hereinafter referred to as low shrinkage filaments), and the high shrinkage filaments become core yarns. ，
The low shrinkage filament becomes a sheath yarn having loops and slack to form the outer peripheral portion, and has a so-called core-sheath structure in which the yarn has a swelling and sublime nature. The difference in heat shrinkage between the high shrinkage filament and the low shrinkage filament is preferably 3% or more in order to effectively exhibit the effects described below.

The relaxation rate during the relaxation heat treatment (the ratio of the difference between the feed rate and the take-up rate to the take-up rate is expressed as a percentage) depends on the difference in the heat shrinkage rate between the high-shrinkage filament and the low-shrinkage filament. , 5 to 50% is preferably adopted. The heat treatment temperature in this case is 130 ℃ ~ 230 ℃
Is preferred.

Next, in the present invention, the alternate twist is applied to the yarn subjected to the relaxation heat treatment and at the same time the alternate twist is applied to the other yarn.

Thus, when the high shrinkage filament becomes the core yarn and the low shrinkage filament becomes the sheath yarn having loops and slacks to form the outer periphery, and the alternate twist is given to the yarn having the bulged core-sheath structure, External forces such as ironing and pulling in the process first apply a force to the core yarn, so unless an excessive force is applied, the alternate twists do not cancel out, and a stable alternate twist structure is exhibited.

After that, the above-mentioned two yarns to which the alternate twists have been applied are not wound up once but continuously spliced together to form SZ alternate twists by the action of the torque of both yarns. The sublimated alternating twisted yarn according to the present invention is manufactured.

In addition, at least one of the alternating twisted yarns has a bulging core-sheath structure, so that the friction resistance with other alternate twisted yarns is large and the SZ alternate twists are unlikely to disappear.

In the present invention, a yarn containing filaments having different heat shrinkage rates may also be used for the other one of the above yarns, and the yarn may be subjected to a relaxation heat treatment as in the above.

It should be noted that even if the alternate twist is applied to the above two yarns, once wound, and then unwound and aligned, the alternate twists given to the respective yarns are lengthened in the longitudinal direction during winding. Alternating twists are not formed because the torque is uniform.

Therefore, it takes 2 before the torque becomes uniform in the longitudinal direction.
The SZ alternating ply-twist is not formed until the yarns of the book are put together and integrated.

Next, the method of the present invention will be described with reference to 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 A ₁ and the low shrinkage multifilament A ₂ are aligned by a guide 1a, and the multifilament yarn A is fed as a feed roller 2a. Then, it is supplied to the first heater 3a and subjected to relaxation heat treatment between the feed roller 2a and the first delivery roller 4a, and then the false twisting and twisting device via the second heater 5a.
It is twisted intermittently by 6a and taken up by the second delivery roller 7. On the other hand, the other multi-filament yarn B is supplied to the roller 4b via the guide 1b, guided to the false twisting device 6b via the heater 5b, intermittently twisted in the same manner as described above, and then by the second delivery roller 7. Be taken over.
Here, the multifilament yarn A and the multifilament yarn B are put together by the second delivery roller 7 and integrated, and are wound up by the winding roller 8 into the package 9 as a sublime alternating twisted yarn having SZ alternating twist.

Although the heater 5a or 5b is provided between the roller 4a or 4b and the false twisting device 6a or 6b in the example of FIG. 1, the heater may not be provided. Although a mechanical spindle can be used as the false twisting device, it is preferable to use a fluid twisting device (air nozzle) by an air swirling flow from the viewpoint of durability and response performance of the device. . Further, two fluid twisting devices may be attached in series, and the yarn may be twisted by intermittently turning in the same direction or in the opposite direction. Further, in order to improve the bundling property of the alternately twisted yarns, it is preferable that the two yarns have the same turning direction and the turning time-turning stop time cycle are matched. Furthermore, as a method of randomly performing the above-mentioned turning time-turning stop time, for example, when a fluid twisting device is used, it is possible to arbitrarily control the injection / stop of the fluid with a microcomputer by using an electromagnetic stool or the like. .

FIG. 2 is a schematic diagram showing an example of the sublime alternating twisted yarn according to the method of the present invention. In the figure, the sublime alternating twisted yarn is composed of a multifilament yarn A and a multifilament yarn B, and the multifilament yarn A has a high shrinkage. Filament yarn
The multifilament yarn B is composed of A ₁ and a low shrinkage filament A ₂ , the multifilament yarn B is composed of a high shrinkage filament yarn B ₁ and a low shrinkage filament B ₂ , and a part I in which the lower twist is S twist and the upper twist is Z twist On the contrary, the part where the lower twist is Z twist and the upper twist is S twist II
Are alternately formed in the longitudinal direction of the yarn.

(Operation) In the method of the present invention, first, by subjecting multifilament yarns having different heat shrinkages to relaxation heat treatment, a high shrinkage filament becomes a core yarn, and a low shrinkage filament becomes a sheath yarn having loop slack, and an outer peripheral portion. To form a core-sheath structure that is rich in sublime and has a difference in yarn length.
Alternate twists are applied to this yarn and other yarns respectively, and these two yarns are combined to form the SZ alternate twists due to the torque of both yarns. Alternatively, the contact area of the filament increases due to the bulge, and the friction resistance between the two yarns increases, forming yarns that are difficult to lose the SZ alternate twist. In the present invention, S
The formation of sublime alternating twists, which is difficult for Z alternate twists to disappear,
It is considered that the filament is less likely to slip due to the increase in the frictional resistance, and the core-sheath structure is exhibited, so that the external force in the subsequent step is applied to the core yarn, and the alternate twisted form in the outer peripheral portion is difficult to be offset.

When both yarns are made by mixing filaments having different heat shrinkage ratios, loops, sags or bulges are formed on both yarns, further increasing frictional resistance between the yarns. As a result, a more stable alternating twisted yarn is formed.

In addition, since a yarn having an SZ alternating twist pattern with loops, sagging, or swelling is formed, a yarn giving a variety of fabric appearances can be obtained. Furthermore, the tightness of the woven and knitted fabric is given by providing the tightness of the alternate twist of the SZ and the twist of the upper twist.

(Example) Next, the method of the present invention will be specifically described with reference to Examples.

Example 1 As the multifilament yarn A, a polyester multifilament yarn 75d / 48f having a boiling water shrinkage rate of 25.3% and a polyester multifilament yarn 50d / 48f having a boiling water shrinkage rate of 6% were aligned and used, while other multifilament yarns were used. Polyester filament yarn with boiling water shrinkage of 8% in B 100d / 48f
Was used to produce sublime alternating twisted yarn under the conditions shown in Table 1 according to the production process shown in FIG. At this time, the multifilament yarn A and the multifilament yarn B were processed under the same conditions except that the multifilament yarn A was subjected to a relaxation heat treatment.
In addition, the compressed air jetting of the two yarns and the compressed air jetting stop cycle were synchronized. As a false twisting device,
A twisting operation was intermittently performed in the Z direction using a fluid twisting device that jets compressed air. The multifilament yarn A and the multifilament yarn B are the second delivery roller 8
They were hooked together and attached together by the torque of each yarn.

The obtained yarn has a slack and a bulge composed of the multifilament yarn A, and a uniform alternating twisted yarn composed of the multi-filament yarn B and the alternate twisted yarn having the core-sheath structure is SZ.
It had a yarn form that was bundled with alternate twists.

Using the above yarn for warp and weft, warp density 78 threads / 2.54c
When weaving a plain woven fabric with m and weft density of 72 yarns / 2.54 cm, the alternate twisting did not disappear even with respect to the warp tension and the weft tension due to the unwinding of the shuttle, and good weavability was exhibited. Further, when the above-mentioned woven fabric was dyed, a woven fabric excellent in tension and waist was obtained.

Example 2 Polyester multifilament yarn 75d / 48f having a boiling water shrinkage of 30% as multifilament yarn A and boiling water shrinkage of 5
% Polyester multi-filament yarn 75d / 48f is used as an air-blended yarn, the same yarn as that of Example 1 is used as the multi-filament yarn B, and other conditions are the same as those of Example 1 Was manufactured.

The obtained yarn had a low-contraction filament having a long yarn length, wound around the outer periphery of a high-contraction filament having a short yarn length, and had a noble alternating twist in which many loops and slack were formed.

This yarn consists of a part having Z twists with an average twist of 280T / M and S twists with an average twist of 720T / M, and an S twist with an average twist of 250T / M. The parts having upper twists and Z twists having an average lower twist of 680 T / M were alternately present.

Using this yarn for warp and weft, the warp density is 72 yarns / 2.5
When weaving a twill fabric with 4 cm, weft density 64 threads / 2.54 cm,
The alternate twisting did not disappear even with the warp tension and the weft tension, a stable alternate twist appearance was exhibited, and a splendid fabric excellent in sublime was obtained.

Example 3 Polyester triangular cross-section multi-filament yarn 50d / 24f with boiling water shrinkage of 9% as multifilament yarn A and low-shrinkage triangular cross-section multifilament yarn 50d / with boiling water shrinkage of 4%
48f are aligned and used, while the other yarn B is made of rayon yarn 7
Substantial alternating twisted yarns were produced under the conditions shown in Table 2 using 0d / 30f. At this time, the heaters 5a and 5b were not used. The multifilament yarn A was twisted in the Z direction and the multifilament yarn B was twisted in the S direction, and the two yarns were set to be alternately turned and turned.

The yarn obtained was composed of alternating twisted yarns with triangular cross-section yarn gloss and bulge, and uniform alternate twisted yarns with rayon luster.
It had a yarn form that was bundled with SZ alternating twists.

Using the above yarn for warp and weft, the warp density is 85 yarns / 2.5
When weaved into a satin fabric with a weft density of 4 cm and a weft density of 82 yarns / 2.54 cm, a woven fabric with silky luster and swelling was obtained without loss of alternating twists.

(Effects of the Invention) Since the present invention has the above-mentioned configuration, it is possible to obtain a sublime alternating twisted yarn in which the alternate twist is hard to be lost even by the tension received in the weaving / knitting process or the like. Further, it is possible to easily manufacture a sublime alternating twisted yarn which is excellent in sublime and can give a variety of appearances to woven and knitted fabrics and suitable tension, waist and bulge for clothing.

[Brief description of drawings]

FIG. 1 is a schematic process diagram showing an example of a manufacturing process of the method of the present invention, and FIG. 2 is a schematic schematic diagram of an example of a sublime alternating twisted yarn according to the method of the present invention.

Claims (1)

[Claims] 1. An SZ alternating twist is applied to each of two yarns, and S
When manufacturing two upper yarns with SZ alternating twists by combining two yarns with Z alternate twists, use at least one yarn containing filaments with different heat shrinkage, This yarn is subjected to relaxation heat treatment, and then to the yarn subjected to relaxation heat treatment, alternate twist is applied, and to another one yarn, alternate twist is applied, and then the alternate yarn is applied to the above two yarns. A method for producing a sublime alternating twisted yarn, characterized in that the SZ alternate twists are formed by the action of the torque of the two yarns without winding the yarns once.