JP2000170049A - Production of coarse grandrelle-like composite yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a coarse grandrelle-like composite yarn having a soft and smooth surface touch by paralleling a preliminarily interlaced thermoplastic synthetic multi-filament crimped yarn and a substantially non-crimped or non- interlaced thermoplastic synthetic multi-filament yarn having different dyeability as that of the crimped yarn and then subjecting the doubled yarns to a blending and interlacing treatment. SOLUTION: This coarse grandrelle-like composite yarn is obtained by paralleling a thermoplastic synthetic multi-filament crimped yarn, such as a crimped yarn prepared by preliminarily applying an interlacing treatment of 20-80 points/ m to a polyester false-twisted yarn incapable of being dyed with cationic dyes and having a titanium dioxide content of 0.5-2.5 wt.%, and a substantially non- crimped or non-interlaced thermoplastic synthetic multi-filament yarn having different dyeability as that of the crimped yarn, such as a cationic dye-dyeable polyester multi-filament yarn, in a ratio of 30:70 to 80:20, preferably 40:60 to 70:30, and applying a blending and interlacing treatment of 30-100 points/m to the paralleled yarn.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a coarse-grained composite yarn which exhibits a soft and smooth surface touch and an excellent coarse-grained tone, and can be suitably used particularly for warp knitting and pile knitting. It is about.

[0002]

2. Description of the Related Art Conventionally, synthetic fibers such as nylon and polyester have an overwhelming advantage in terms of material abundance and ease of handling as compared to natural fibers such as wool as pile materials for pile fabrics. Is widely used. This pile fabric has been widely accepted as a high-grade material because of its naps on its surface, and has been widely used as an interior material for vehicles. Is coming.

[0003] In order to meet such a demand, for example, in a warp knitted pile knitted fabric, a mixed yarn of a cationic polyester non-dyeable regular polyester fiber and a cationic dye dyeable polyester fiber is used in a pile portion, and a disperse dye is used. And a method of dyeing with a cationic dye to develop a heather effect have been proposed, but there is a problem that the effect of the coarse heather effect is still insufficient.

[0004] On the other hand, pile fabrics tend to have a problem of gloss change such that they appear whitish or dull due to dents or bending. As a method for solving this problem, Japanese Utility Model Publication No. 6-27672 discloses a method. There has been proposed a method of using a mixed yarn of a crimped yarn and a multifilament yarn having substantially no crimp. However, since the change in gloss is reduced by sufficiently dispersing and mixing the crimped yarn and the non-crimped yarn, even if the crimped yarn and the non-crimped yarn having different dyeing properties from each other are combined, it is not obtained. However, there is a problem that the obtained composite yarn only exhibits a fine heather, and it is not possible to obtain an excellent coarse heather composite yarn.

As another method, there has been proposed a method of twisting a crimped yarn and a non-crimped yarn having different dyeing properties. There is a problem that a soft and smooth surface touch cannot be obtained.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned prior art, and has as its object to provide a soft and smooth surface touch and an excellent coarse-grain tone for a pile fabric, particularly An object of the present invention is to provide a method for producing a coarse-grained composite yarn suitable for warp knitting and knitting.

[0007]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the above object, and as a result, a crimped yarn subjected to an entanglement treatment and a non-crimped yarn having different dyeability from the crimped yarn. And then entangled, to obtain a coarse-grained composite yarn pile fabric suitable for obtaining a pile fabric with a soft and smooth surface touch and an excellent coarse-grained tone. This has led to the present invention.

That is, according to the present invention, a crimped yarn of a thermoplastic synthetic fiber multifilament yarn is subjected to a pre-entanglement treatment in advance, and then substantially crimped and entangled with a different dyeability from the crimped yarn. The present invention provides a method for producing a coarse-grained composite yarn, wherein a multifilament yarn of a thermoplastic synthetic fiber having no fiber is blended and mixed and entangled.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The thermoplastic polymer constituting the crimped yarn used in the present invention is not particularly limited as long as it is fiber-forming and can be melt-spun, and polyesters such as polyethylene terephthalate and polyethylene naphthalate can be used.
Polyamides such as nylon 6, nylon 66 are preferred,
Among them, polyethylene terephthalate is preferred. Furthermore, in this thermoplastic polymer, titanium oxide is 0.5 to
It is preferred that it is contained in an amount of 2.5% by weight, particularly 1.5 to 2.0% by weight, in order to obtain a composite yarn exhibiting a more excellent coarse-grained tone. These polyesters, polyamides and the like may be homopolymers or copolymers having a small amount of a copolymer component for imparting properties such as flame retardancy.

The method of imparting crimp to the thermoplastic synthetic fiber multifilament is optional, but is usually performed by (drawing) false twisting. For example, in the case of polyester,
The use of a drawing false twisting machine, which is a non-contact heater having an atmosphere temperature of 350 to 800 ° C. for the untwisted filament yarn, is a high-speed processing such as a false twisting speed of 700 m / min or more. This is also preferable because the process stability does not decrease and a crimped yarn of good quality can be stably obtained. The single fiber fineness of the crimped yarn is suitably in the range of 1.0 to 2.5 denier, particularly 1.5 to 2.0 denier, in that the effect of expressing the coarse heather is excellent.

Next, the thermoplastic polymer constituting the other multifilament yarn having substantially no crimping and entanglement (hereinafter, may be simply referred to as a non-crimped yarn) used in the present invention is as described above. It is optional as long as it has a different dyeability from the crimped yarn. For example, if the crimped yarn is a polyethylene terephthalate fiber, a cationic dye obtained by copolymerizing a sulfonate group-containing compound having a different dyeability from the fiber can be used. Examples thereof include dyeable polyesters, easily dyeable polyesters that can be dyed with a disperse dye under normal pressure, and polyamides such as nylon 6 and nylon 66. Examples of the combination of the two include polyethylene terephthalate and cationic dye dyeable polyester, polyester yarn and polyamide yarn. The single fiber fineness of the non-crimped yarn is 0.5 to 5.
0 denier, particularly 1.5 to 3.0 denier, is appropriate, and is preferable because the rough surface tone and the soft surface touch are significantly improved.

In the present invention, the above-mentioned crimped yarn and non-crimped yarn are aligned and mixed and entangled to form a composite yarn. However, prior to this alignment, the crimped yarn is entangled. Is important, and if the confounding treatment has not been performed in advance, it is not preferable because it is impossible to obtain a composite yarn exhibiting a coarse-grained tone. The method of the confounding treatment is not particularly limited, and a conventionally known method may be appropriately selected, and for example, the pneumatic treatment may be performed using an interlace nozzle. If the number of entanglements at this time is too large, there is a tendency that the bunching property of the obtained yarn becomes poor due to inferior fiber mixing during the next mixed entanglement treatment, while if the number is too small, the obtained composite yarn has a sufficient coarse heat 20 ~
A range of 80 pieces / m is appropriate.

[0013] The method of blending and entanglement of the aligned yarn of the entangled crimped yarn and the non-crimped yarn having substantially no entanglement may be appropriately selected from conventionally known methods. Compressed air treatment may be performed using At this time, if the number of entanglements (the difference between the number of entanglements measured with the composite yarn and the number of entanglements measured with the crimped yarn) is too small, the mixing tends to be poor and the convergence of the yarn tends to decrease, while When the amount is too large, the obtained composite yarn is difficult to exhibit a sufficient coarse-grained tone.
The range of 0 to 100 pieces / m is appropriate.

The mixed ratio (fineness ratio) of the crimped yarn and the non-crimped yarn is 30:70 from the viewpoint of the coarse heat of the obtained composite yarn.
The range of -80: 20, particularly 40: 60-70: 30 is suitable. The total fineness is suitably in the range of 75 to 200 denier from the viewpoints of pile density, basis weight, and the like when formed into a pile fabric such as a pile knit.

The obtained composite yarn can be used as it is, but at a temperature of 100 to 500 ° C., especially 250 to 4 ° C.
Heat treatment at a temperature of 00 ° C. is preferable because a variation in the heather pattern is reduced and a pile fabric with higher quality is obtained.

The above-described composite yarn of the present invention can be made into a pile fabric by using the composite yarn as a pile yarn and then subjected to a treatment such as dyeing, raising, breaking, shearing, etc., to obtain a soft and smooth surface touch. And a high-quality pile fabric having an excellent rough-grained appearance can be obtained. For example, if knitting is performed with a commercially available 28 gauge warp knitting machine, an excellent warp knitted pile knit can be obtained.

[0017]

The present invention will be described in more detail with reference to the following examples. In addition, each characteristic in an Example was measured by the following method. <Appearance> The roughness of the heather and the appearance of different colors were sensory-determined by five skilled persons, and expressed in two stages: good (O) and bad (X). <Hand feeling> The softness and smoothness of the surface touch were sensory-determined by five skilled persons and expressed in two stages of good (O) and bad (X).

Example 1, Comparative Examples 1 to 3 Winding speed 32
130 denier / 72 filaments of polyester multifilament yarn having a titanium oxide content of 2.0% by weight wound at 00 m / min, processing speed 700 m / min, draw ratio 1.7 times, false twist temperature (non-contact heater) 510/28
Interlaced treatment (entanglement treatment: compressed air pressure 2.0 kg / cm ² , number of entanglements 40 / m)
Then, 50 denier / 24 filaments of the cationic dye-dyeable polyester multifilament yarn are aligned and then subjected to a side interlace treatment (mixed fiber entanglement treatment: 4.0 kg / cm ^{2 at} a compressed air pressure, 80 entanglements / m), Then, it was heat-set through a non-contact heater at an ambient temperature of 350 ° C to obtain a composite yarn.

The obtained composite yarn is used as a pile yarn, knitted with a Karl Meyer 28 gauge warp knitting machine using a 75 denier / 36 filament polyethylene terephthalate multifilament yarn for a ground structure, and then knitted according to a conventional method. A knitted pile knit (pile density 68 cpi, pile length 2.0 mm) was prepared.

The knitted pile is used as a disperse dye as KAY
ALON POLYESTER Blue-3R to 0.
5% owf, KAYACELON as cationic dye
Stained with BROWN C-GL using 3.0% owf. Table 1 shows the evaluation results of the obtained pile knitted fabric. In addition, as a comparison, it carried out similarly to the above except having changed the yarn guide as shown to BD of FIG. 1, and changed the interlace pressure air pressure as shown in Table 1. The results are shown in Table 1.

[0021]

[Table 1]

[0022]

According to the composite yarn of the present invention, since the crimped yarn is pre-entangled and then mixed with non-crimped yarns having different dyeing properties, the mixing of both yarns is appropriately controlled. As a result, an excellent rough-grained tone can be obtained, and a soft and smooth surface touch feeling can be imparted. Therefore, the composite yarn of the present invention is extremely suitable for use as a pile yarn of a pile fabric, especially a warp knit pile knit.

[Brief description of the drawings]

FIG. 1 is a schematic view of a yarn guide of an apparatus used in an example.

[Explanation of symbols]

CD Cationic dye dyeable polyester multifilament yarn FD Titanium oxide-containing polyester multifilament yarn 1 False twisting device 2 Roller 3 Heat set heater (non-contact type) 4 Roller

Claims (4)

[Claims] 1. A crimped yarn of a thermoplastic synthetic fiber multifilament yarn, which is previously subjected to an entanglement treatment, and then a thermoplastic synthetic yarn having substantially no crimping and entanglement which differs from the crimped yarn in dyeability. A method for producing a coarse-grained composite yarn, wherein a multifilament yarn of fibers is aligned and mixed and entangled. 2. The crimped yarn is a non-cation dyeable polyester false twisted yarn, and the thermoplastic synthetic fiber multifilament yarn having substantially no crimp is a cationic dye dyeable polyester multifilament yarn. Claim 1
A method for producing a coarse heather composite yarn according to the above. 3. The method according to claim 2, wherein the content of titanium oxide in the polyester false twisted yarn is 0.5 to 2.5% by weight. 4. The method according to claim 1, wherein the number of entanglements in the entanglement process applied to the crimped yarn in advance is 20 to 80 / m, and the number of entanglements in the entanglement process applied after alignment is 30 to 100 / m. 2. The method for producing a coarse-grained composite yarn according to claim 1.