JPH02269823A - Production of blended textured yarn - Google Patents

Abstract

PURPOSE:To obtain slub-fashioned blended textured yarn with parts of uneven thickness and varyingly dyeable parts mixed along the longer direction by intermittent liquid treatment and hot drawing of a thermoplastic highly oriented undrawn yarn followed by false twisting of the resultant drawn yarn together with a second thermoplastic drawn yarn at each specified feed rate. CONSTITUTION:Thermoplastic drawn yarn B is fed to a twister 5 at a feed rate of <=10%. Thermoplastic highly oriented undrawn yarn A is intermittently imparted with a liquid at a liquid-imparting device 9 and hot-drawn between a roller 8 and a second roller 11 so as not to come into contact with a heater 10, and then fed at a feed rate of 50-200 (pref. 80-150)% to the above twister 5. The resulting two kinds of fed yarns are put to simultaneous false twisting, thus obtaining the objective blended textured yarn rich in variety in the longer direction with the yarn A tightly wound on the yarn B.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is directed to a composite material that exhibits a novel slub-like appearance in which a wide variety of thick and thin shapes and dark and light dyeable areas are mixed along the longitudinal direction of the yarn. This invention relates to a method for producing processed yarn.

(Prior art) Conventionally, in a false twisting process, multifilament yarns are wound with other multifilament yarns of irregular length and thickness to form slabs, nep, etc., to produce pongee-like slub yarns. is well known.

For example, Japanese Patent Publication No. 50-35147 discloses that by overfeeding another filament yarn that will become a sheath yarn to a yarn that will become a core yarn during false twist heating, a single spiral portion (- A method is described in which a large number of irregularly formed triple spiral portions (vertical portions) and triple spiral portions (triple portions) are formed into a slub yarn.

However, in the slub yarn obtained by this method, the difference in dyeability between the triple part and the single part is the same, so a clear color tone effect due to the difference in shading cannot be obtained.

In addition, the thick/fine ratio of the triple-ply part to the single-ply part is almost constant at any part in the longitudinal direction of the yarn, resulting in monotonous unevenness, making it impossible to obtain a thick/fine form with a natural fiber-like variation. It has the following disadvantages.

Further, Japanese Patent Publication No. 59-50766 discloses a method of manufacturing slub yarn by winding ordinary thick and thin yarns around a core yarn, but the thick fineness portion of the thick and fine yarns is very short. However, because the thick parts of each filament are dispersed and their phases are not aligned, it is possible to obtain triple parts with appropriate lengths and clear differences in dyeability, and thick and thin forms with a mixture of parts with different thick-to-thin ratios. It has the disadvantage that it is not.

Furthermore, it is obtained by stretching a low-oriented undrawn yarn.

A method of winding a large fine yarn having a large fineness portion in which the phases of each filament are aligned around the core yarn can be considered, but this large fine yarn has the disadvantage that the large fineness portion is likely to become brittle.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned drawbacks and solves the change in the natural fiber tone in which parts with different diameter ratios in the main part and in the details coexist along the longitudinal direction of the yarn. To provide a method for manufacturing a novel slub-like composite textured yarn having a rich thick and thin appearance and a variety of color tone effects in which clear dark dyed areas, light dyed areas and intermediate dyed areas are mixed. This is a technical issue.

(Means for Solving the Problems) In other words, 1) the present invention comprises a yarn A obtained by intermittently liquid-treating a thermoplastic highly oriented undrawn yarn and then hot drawing, and 4 a normal thermoplastic drawn yarn B. When performing false twisting at the same time, the hot stretching is followed by false twisting, and the feed rate to the false twisting area is 10% or less for yarn B, 50% or more for yarn A, The gist of this paper is a method for producing a composite textured yarn characterized in that the fiber density is 200% or less.

Hereinafter, nine aspects of the present invention will be described in detail.

FIG. 1 is a schematic process diagram showing one embodiment of the present invention. In FIG. 1, a normal drawn thermoplastic yarn B is pulled out from a pirn I by a supply roller 3 through a guide 2 and supplied to a false twisting area.

On the other hand, the thermoplastic highly oriented undrawn yarn is pulled out from the cheese 13 by the roller 8, and liquid is intermittently applied to it by a random number 13 by a microcomputer in the liquid application device 9. The film is then hot-stretched at a predetermined stretching ratio in a non-contact state with the heating device 10. This process results in yarn A with uneven thickness,
Continuing with hot drawing and at a feed rate greater than yarn B,
It is supplied to the false twist processing area via the adjustment guide 12.

In the false twisting area, yarn A merges with yarn B in the heating area,
The yarn A is heated by the heater 4 and false-twisted by the false-twisting device 5, so that the yarn A is wound around the yarn B.

After a single layer portion and a triple layer portion having uneven thickness are formed between each wrapped portion, the sheet is passed through a take-up roller 6 and wound up into a pan cage by a single take-up roller 7.

In the present invention, the yarn A, which has been heat-stretched from a highly oriented undrawn yarn that has been subjected to one-intermittent liquid treatment and has uneven thickness, is supplied to the false twisting process immediately after the hot drawing. The tension in the hot drawing process acts as a shrinking force of the yarn when it is wound around the yarn B in the false twisting heating region, so that the yarn A is tightly wound around the yarn B.

It is possible to form single-layered parts and triple-layered parts with excellent morphological robustness.

The yarn B used in the present invention may be any stretched thermoplastic multifilament yarn made of polyester, polyamide, or the like.

In the present invention, it is necessary to keep the supply rate of yarn B to the false twisting processing area at 10% or less; if the supply rate exceeds 10%, the false twisting state becomes unstable and processing becomes impossible. As mentioned above, in the present invention, the feeding rate of the yarn B is set to a relaxed state of 10% or less or a tension state of 0% yen or less for false twisting.

It is necessary to avoid a state of tension that may lead to excessive fluff or thread breakage.

Note that the supply rate of yarn B is determined by the following formula.

■,: Surface speed of supply roller 3 (m/m1n) ■,: Surface speed of take-up roller 6 (m/m1n) On the other hand, 1. In the present invention, highly oriented thermoplastic undrawn yarn used to obtain yarn A is a multifilament yarn obtained by high-speed spinning of thermoplastic polymers such as polyester and polyamide.
It is preferable to use a highly oriented undrawn yarn with a diameter of 20X10-'' to 80X10-3.If water or an aqueous liquid is applied intermittently, the area to which the liquid has adhered becomes a thick part by hot stretching, but polyester If the birefringence Δn of the highly oriented undrawn yarn is small (less than 20X 10-3), the birefringence of the thick part is too low, so that some of the filaments may melt and break during the subsequent false twisting process. In addition, the obtained crimped yarn has many single fluffs, which not only makes knitting and weaving difficult, but also causes large fineness parts to become brittle during thermal processing such as dyeing.
This is not preferable because it reduces the tear strength of the knitted fabric. on the other hand,
For polyester yarns whose birefringence Δn exceeds 80×10−”.

It was not possible to increase the stretching ratio during hot stretching.

Since the difference between the part to which the liquid has adhered and the part to which the liquid has not adhered is not clear, it is not possible to increase the thick-to-thin ratio of the yarn.

When applying liquid to the yarn intermittently.

It is preferable to do this under tension. Any method may be used to apply the liquid to the yarn intermittently as long as the liquid can be applied intermittently over an appropriate length, but in particular a method that uses a microcomputer and a random pulse generation unit is particularly suitable. However, it is preferable because the liquid can be deposited at random intervals and lengths.

Next, the yarn to which liquid has been intermittently attached as described above is
This is then continuously hot-stretched, and the part to which the liquid has adhered is defined as a large-fineness part, and the part to which no liquid has adhered is defined as a fine-fineness part. In this case, it is preferable to carry out hot stretching without contacting a heating device. When the yarn is hot-stretched without contacting the heating device, the heat shielding effect of the liquid attached to the yarn increases, and yarn A having a high fineness ratio can be obtained.

The temperature during hot stretching depends on the yarn and heater length.

For example, in the case of highly oriented undrawn polyester yarn, the yarn speed is 80~
At 200 m/min, a range of 140° C. or higher and around 240° C. where no breakage of the fusion bond occurs is preferable.

In addition, the stretching ratio during hot stretching is preferably in the range of 1.2 to 3.0; if the stretching ratio is less than 1.2, the part to which the liquid is not attached will only receive low tensile deformation during hot stretching, and It is difficult to obtain yarn with a large fineness ratio. − side, the stretching ratio is 3.0
Exceeding this is not preferable because part of the filament is likely to be cut and operability is likely to deteriorate.

Next, in the present invention, as described above, the yarn A obtained by subjecting the thermoplastic highly oriented undrawn yarn to intermittent liquid treatment and hot stretching is supplied to the false twisting area following the hot stretching and heated. The yarn B inside is wound, and the feeding rate between the supply roller 11 and the take-up roller 6 at that time is 50% or more.

It is necessary to set it to 200% or less, and in particular, from the viewpoint of slab shape and processing stability, it is preferable to set it to 80 to 150%. When the supply rate of yarn A is less than 50%.

A processed yarn having single-fold and triple-fold parts, which is the object of the present invention, cannot be obtained. Moreover, if it exceeds 200%, the excessively supplied yarn A cannot be completely wrapped around the yarn B, which becomes the core yarn, and yarn breakage occurs, which is not preferable.

Note that the supply rate of yarn A is determined by the following formula.

■: Surface speed of supply roller 11 (m, '+1n) v6
: Surface speed of take-up roller 6 (m/+win) The temperature during the above-mentioned false twisting process is 2. For example, in the yarn speed range of 80 to 200 m/win, in the case of polyester, 140 to 250°C is suitable. In addition, the number of false twists (T/M) is (15000
~35,000) / * (D is the denier of yarn B) is preferable, and when the number of false twists exceeds 35,000/V'TV.

Yarn breakage is likely to occur, which is unfavorable for operation. On the other hand, if it is less than 15,000/V'100, crimp will be small and a strong winding pattern will not be obtained.

The composite processed yarn obtained by the present invention does not have a monotonous uneven thickness, but has a variety of uneven shapes with a mixture of parts with different diameter ratios between the main part and the details, and a winding pattern of the mixed main part and the details. It is a slub-like composite textured yarn that has a color tone effect and a more natural feel.

FIGS. 2 and 3 are schematic external views showing two embodiments of composite processed yarn obtained by the present invention.

First of all, in Miebe.

■Triple detail a where the triple part is entirely composed of the fineness part of yarn A.

■ A triple mixed rope part in which the outer layer of the triple part is composed of a fine fineness part and the inner layer has a large fineness part of yarn A, c.

■Triple mixed large portions d and e where the outer layer of the triple layer is composed of a large fineness portion and the inner layer has a fine fineness portion.

■The Mie part is composed entirely of large fineness parts.

There is.

Also, to Shigebe.

■--Single detail A where the overlapped part is composed of the fineness part of yarn A.

■-Single-fold human part in which the heavy part is composed of a large fineness part of yarn A.

There are two types of configurations. Of course, each of the double and triple parts includes a mixture of large fineness parts and fine fineness parts of yarn A.

Furthermore, when the woven or knitted fabric obtained using the composite textured yarn produced according to the present invention is dyed, the three-layered part r is the thickest and dyed deeply, and the three-layered part a is the thinnest among the three-layered parts and shows a light color. As the triple part having an intermediate thickness and chromaticity between the triple part and the triple detail, there are a triple mixed large part having 54 colors and a triple mixed detail having a slightly lighter color. In addition, the single part is formed as a thinner part as a whole than the triple part, and the thinnest single part A in the longitudinal direction of the thread is the very light part, and the opening of the - heavy part is slightly thicker and darker than the - heavy part. Show color.

As described above, when an IaW product obtained using the composite processed yarn produced according to the present invention is dyed, there is a difference in the shape of irregularities in the triple part, a clear difference in shade, and a mixture of thick and fine parts. In a neutral hue.

- With the addition of the convex-convex shape of the overlapped parts and the clear difference in shading, it is possible to create a fabric with a wide variety of thick and thin shapes and a variety of color tone effects.

Moreover, each weight of the composite processed yarn obtained by the present invention is as follows.

In the thick and fine thread A of the sheath yarn constituting the triple part, the large fineness part and the fine fineness part of each wheel filament are aligned in phase, and the thick fineness part has an appropriate length.

- It is possible to form clearly deep dyeable areas in the double and triple parts.

(Function) As described above, in the present invention, a liquid is intermittently applied to a thermoplastic highly oriented undrawn yarn, and then hot stretching is performed.
When simultaneously false-twisting the yarn A, in which thick and fine fineness portions are formed in which the phase of each wheel filament is aligned in the longitudinal direction of the yarn, and the normal thermoplastic drawn yarn B, the above-mentioned thermal Following the drawing, a false twisting process is performed and the threads are over-supplied, so the tension during hot drawing is added as a shrinkage force, resulting in a composite textured yarn in which thread A is tightly wound around thread B. be able to.

In addition, the composite processed yarn obtained by the present invention has various combinations of uneven thickness and dyeability differences randomly mixed in the longitudinal direction at arbitrary lengths.

If you use this thread, you can create a clear dark dyed front.

A novel wi knitted fabric having various hue effects and a varied surface appearance can be obtained.

(Example) Next, the present invention will be specifically explained using examples.

Example 1 The birefringence Δn obtained by high-speed spinning is 53×10-'.

110d/36f polyester highly oriented undrawn yarn;
150d/48f ordinary polyester drawn yarn (yarn B
), intermittent liquid deposition, hot stretching, and false twisting were successively performed under the processing conditions shown in Table 1 according to the process shown in FIG. 1 to produce a composite textured yarn.

Table 1 The obtained composite processed yarn has a structure in which yarn A having a large fineness part and a fine fineness part is tightly wound around yarn B, and
As shown in the table, the yarn had differences in dyeability in the main part and in the details, as well as in light and shade, with random intervals in the longitudinal direction.

Table 2 The color differences in Table 2 are as follows: Composite processed yarn is tube-knitted - dyed (dyeing recipe Niresoline Blue GRL 2% owf, 10
After dyeing at 0° C. for 30 minutes, the sample was disassembled to prepare a yarn-wound sample, and the color difference from other portions was evaluated using a gray scale for discoloration and fading, using the - heavy line area A as the reference chromaticity.

This composite processed yarn was used for the warp and weft to create a plain woven fabric (warp density = 56 threads/2.54clI+, weft density: 53 threads/2.
54Cffi) and finished with a normal polyester dyeing process, the fabric exhibits a novel slub-like appearance with a natural fiber-like uneven appearance, clear shading differences, and a mixture of intermediate color tones. was gotten.

(Effects of the Invention) As described above, in the present invention, a thermoplastic highly oriented undrawn yarn is subjected to intermittent liquid adhesion and hot stretching to form a yarn A having a large fineness portion and a fine fineness portion, and then heated. Continuing with the drawing, the normal thermoplastic drawn yarn B is over-supplied and false-twisted at the same time, so the tension during hot drawing acts as a contractile force and the yarn A is firmly attached to the yarn B. A wound composite thread can be obtained.

The composite processed yarn obtained by the present invention contains parts with large and small diameter ratios and dyeability that differ greatly along the longitudinal direction of the yarn. It is possible to obtain a novel woven or knitted fabric having a thick and thin appearance rich in changes in fiber tone and a variety of color tone effects in which clear dark color areas, light color areas, and intermediate colors are mixed.

[Brief explanation of drawings]

Figure 1 is a schematic process diagram showing embodiment B of the second invention.
3 and 3 are schematic external views showing an embodiment of a composite processed yarn obtained by the present invention. 3: Supply roller 8: Roller 4 Niheater 9: Liquid application device 5: False twisting device 10: Heating device 6: Take-up roller 11
:Supply roller patent applicant Kou Uni-Tei Riki Co., Ltd. 1 Figure

Claims (1)

[Claims] (1) Intermittent liquid treatment of thermoplastic highly oriented undrawn yarn,
Next, when simultaneously false-twisting the hot-stretched yarn A and the normal thermoplastic drawn yarn B, false-twisting is performed following the hot-stretching, and the supply rate to the false-twisting area is adjusted. A method for producing a composite textured yarn, characterized in that yarn B is 10% or less, and yarn A is 50% or more and 200% or less.