JPH11107081A - Production of composite processed yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a composite processed yarn having a soft touch, excellent in deep colorability and resilience and useful for black formal wears and the like by paralleling specific polytrimethylene terephthalate yarns to other multifilaments and subsequently subjecting the paralleled yarns to a false twisting processing. SOLUTION: This method for producing a composite processed yarn comprises paralleling polytrimethylene terephthalate yarns to other multifilaments such as polybutylene terephthalate filaments and subsequently subjecting the paralleled yarns to a false twisting processing. The polytrimethylene terephthalate yarns are obtained by subjecting partially oriented undrawn polytrimethylene terephthalate multifilament yarns to a relaxing thermal treatment at a temperature of <=150 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method for producing a composite yarn. More specifically, the present invention relates to a method for producing a composite processed yarn having excellent deep color.

[0002]

2. Description of the Related Art A woven fabric using a composite crimped yarn obtained by subjecting two or more polyester multifilament yarns having a difference in elongation to entanglement and blending and then performing false twisting is subjected to soft touch. It has a good reputation for providing a worsted-like woven fabric having excellent firmness and resilience while having. However, when such a composite crimped yarn is developed for so-called black formal use, deep color is required, but conventional composite crimped yarn has insufficient color deepness.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to improve such a problem and to provide a composite yarn having excellent deep color.

[0004]

The present inventors have found that the use of polytrimethylene terephthalate fiber as a fiber constituting a composite textured yarn solves such a problem, and has reached the present invention. That is, the present invention relates to a polytrimethylene terephthalate multifilament partially oriented undrawn yarn (hereinafter referred to as “POY”), which is obtained by relaxing heat treatment at a temperature of 150 ° C. or less and a polytrimethylene terephthalate yarn and another multifilament. And a method for producing a composite textured yarn, characterized in that false twisting is performed.

In the present invention, the polytrimethylene terephthalate fiber is a polyester fiber having trimethylene terephthalate unit as a main repeating unit, and the trimethylene terephthalate unit has about 50 mol% or more, preferably 70 mol% or more, more preferably Is 80 mol%
Above, particularly preferably 90 mol% or more. Therefore, the total amount of the other acid component and / or glycol component as the third component is about 50 mol% or less, preferably 30 mol% or less, more preferably 20 mol% or less, and particularly preferably 10 mol% or less. Polytrimethylene terephthalate contained.

[0006] Polytrimethylene terephthalate is produced by condensing terephthalic acid or a functional derivative thereof with trimethylene glycol or a functional derivative thereof in the presence of a catalyst under appropriate reaction conditions. In this production process, an appropriate one or two or more third components may be added to form a copolymerized polyester, or
Polytrimethylene terephthalate and other polyesters other than polytrimethylene terephthalate, such as polyester and nylon, and polytrimethylene terephthalate may be separately produced and then blended or composite-spun (sheath core, side-by-side, etc.).

The third components to be added include aliphatic dicarboxylic acids (oxalic acid, adipic acid, etc.), alicyclic dicarboxylic acids (cyclohexane dicarboxylic acid, etc.), and aromatic dicarboxylic acids (isophthalic acid, sodium sulfoisophthalic acid, etc.). ), Aliphatic glycols (ethylene glycol, 1,2
-Propylene glycol, tetramethylene glycol, etc.), alicyclic glycols (cyclohexanediol, etc.), aromatic dioxy compounds (hydroquinone bisphenol A, etc.), aliphatic glycols containing aromatics (1,4
-Bis (β-hydroxyethoxy) benzene, etc.), polyether glycols (polyethylene glycol, polypropylene glycol, etc.), aliphatic oxycarboxylic acids (ω
-Oxycaproic acid), aromatic oxycarboxylic acids (P
-Oxybenzoic acid, etc.). Compounds having one or more ester-forming functional groups (such as benzoic acid or glycerin) can also be used as long as the polymer is substantially linear.

Further, polytrimethylene terephthalate includes matting agents such as titanium dioxide, stabilizers such as phosphoric acid, ultraviolet absorbers such as hydroxybenzophenone derivatives, crystallization nucleating agents such as talc, and lubricating agents such as aerosil. An antioxidant such as a hindered phenol derivative, a flame retardant, an antistatic agent, a pigment, a fluorescent whitening agent, an infrared absorber, an antifoaming agent and the like may be contained. In the present invention, POY of such polytrimethylene terephthalate fiber is used, and specifically, 2000 m / min or more, preferably 2500 m / min.
Polytrimethylene terephthalate fibers spun at a winding speed of 4000 m / min are used.

The POY may be uniform in the length direction or thick and thin, and the cross section may be round, triangular, L-shaped or T-shaped.
It may be a polygonal type such as a type, a Y type, a W type, an eight leaf type, a flat shape, a dog bone type or the like, a multi leaf type, a hollow type or an irregular type. In the present invention, the POY which has been subjected to a relaxation heat treatment is used.
The film may be stretched by about 2 to 1.5 times or false twisted and then subjected to relaxation heat treatment.

The relaxation heat treatment conditions are 150 ° C. or less,
Preferably, it must be in the range of 110 to 150 ° C,
If it exceeds 150 ° C., the object of the present invention cannot be achieved. The heat treatment time is preferably 0.2 to 0.8 seconds, particularly preferably 0.3 to 0.6 seconds. The relaxation rate is preferably such that the POY yarn length can be shrunk by 15% or more compared to before the relaxation heat treatment, and preferably 15 to 30%, and the relaxation rate is usually in the range of 20 to 45%. You just have to choose.

In the present invention, PO having different spinning speeds is used.
It is preferable to use a yarn mixed by, for example, performing a relaxation heat treatment using two or more kinds of Y and / or changing the relaxation rate in the relaxation heat treatment. Since these yarns have different elongation rates, during the subsequent false twisting,
When a centrifugal force is applied to these yarns, the yarn having a high elongation rate is preferably a structure wound around the outside of the composite yarn, that is, a so-called multilayer core-structured composite processed yarn. As other multifilaments to be aligned with the POY subjected to the relaxation heat treatment as described above, thermoplastic synthetic fiber multifilaments, preferably polyester multifilament yarns such as polytrimethylene terephthalate, polybutylene terephthalate, and polyethylene terephthalate, and cationic dyeable polyester It is preferable to add polyester having an antistatic agent, a matting agent, or the like, or a polyester having a single cross section of a round shape, an irregular cross section such as a triangle, or a hollow cross section.

Specifically, for example, a single-denier denier is 0.5
Up to 6 denier ordinary polyester multifilament yarn, polyester multifilament POY having a different spinning speed from POY described above, and cold drawn yarns thereof, so-called thick and thin yarn having an undrawn portion in the yarn axis direction, solid or hollow Conjugate yarn of side-by-side type, eccentric type, etc., 6000 m / min, preferably 7000
It is obtained by a spin take-up method in which spinning is performed at a winding speed of at least m / min or a spin draw take-up method in which spinning-drawing-winding is performed in a series of steps at a winding speed of 4000 m / min, preferably, 5000 m / min or more. And so-called high-speed spun polyester yarns, as well as cold-drawn yarns thereof, high-shrinkage yarns having a boiling water shrinkage of about 6 to 30%, and so-called different shrinkage mixed fiber yarns comprising such high-shrinkage yarns and low-shrinkage yarns. One or two or more of these may be used.

In the present invention, the term "supplying in a uniform manner" means that the fibers are supplied at the same time in a mixed and entangled manner, or supplied with a difference in feed rate (preferably about 2 to 30%). In particular, it is preferable to supply the POY at a high feed rate because the yarn length difference becomes large. The mixing ratio of the two may be appropriately selected according to the purpose. For example, the mixing ratio of POY and other yarns is 30:70 to 5
0:50, the ratio of single yarn denier is other yarn / POY = 1.5
The number of entangled portions is preferably 50 or more per 1 m of yarn length, and more preferably 80 to 120 / m.

As the conditions for false twisting, the false twist temperature is from the glass transition temperature to 180 ° C., preferably 110 to 170 ° C.
Particularly preferably, when false twisting is performed at a false twist temperature of 110 to 150 ° C., a sense of swelling is large. The number of false twists may be appropriately selected within the range usually employed, but in the following formula, the false twist coefficient K is 0.5 to 1.2, preferably 0.6 to 0.8.
It is preferable from the viewpoint of the worsted texture to be selected within the range. False twist number (T / m) = {23000 / {D + 590} × K where D is the total denier of the fiber.

The composite textured yarn obtained by the present invention is 20
It is most effective to use a twist twist of 0 T / m or more, preferably about 500 to 2500 T / m, and it is most effective to use both a warp and a weft in producing a woven fabric. Yarn, preferably a thick and thin yarn, a polyester mixed shrinkage mixed yarn, a spun spun yarn, a very fine polyester multifilament yarn having a single denier of 0.1 to 0.8 denier. , 6000 m / min,
Preferably, it may be mixed with one or more kinds of spin take-up yarn spun at a winding speed of 7000 m / min or more.

As a mixed form, a part of the warp and / or the weft may be mixed with one of the warp and the weft. As the woven structure, plain woven fabric, twill woven fabric, satin woven fabric may be used,
The density (book / inch) is as follows: warp density 70 to 120, preferably 80 to 110, and weft density 50 to 100, preferably 60.
~ 90 is preferred. In addition, after weaving, scouring relaxation treatment is performed, then, if necessary, alkali weight reduction processing with a weight reduction rate of about 5 to 30% is performed, followed by dyeing and finishing processing such as deep color processing based on low refractive index resin application. However, brushing such as so-called peach skin may be further provided by, for example, emery paper, a brush, a needle cloth, or the like, and other various finishing processes such as embossing and printing may be performed.
Further, a finishing agent such as a softening agent, a water repellent, or an antistatic agent may be used.

[0017]

EXAMPLES Hereinafter, the present invention will be described specifically with reference to examples and the like, but the present invention is not limited to these examples and the like. The L value was measured using Macbeth CE-3000 (trade name, manufactured by Sakata Inx Co., Ltd.).

Example 1 Polytrimethylene terephthalate having ηsp / c = 0.8 was prepared by spinning at 265 ° C. and 325.
The yarn was spun at a winding speed of 0 m / min to obtain a POY of polytrimethylene terephthalate of 71d / 48f. After the obtained POY was subjected to a non-contact relaxation heat treatment by a hollow heater under the following conditions, it was aligned with a 75d / 24f regular polyester multifilament yarn and false twisted under the following conditions.

<Relaxation heat treatment condition> Heat treatment temperature; 150 ° C. Heat treatment time; 0.5 second Relaxation rate; 38% <Condition of false twisting> Feed rate: 1.5% (feed rate difference 0%) Number of false twists: 2425T / M false twist temperature; 150 ° C

1600T in the S direction is applied to the obtained composite textured yarn.
/ M is used for warp, and two wefts are used for the same composite processed yarn, which are subjected to 1600 T / m in the S direction and the Z direction alternately, and the warp density is 132. Book/
Inch, a veneer with a weft density of 68 yarns / inch was prepared. Then, according to a conventional method, scouring relaxation, presetting, alkali weight reduction (weight reduction rate of 10%), dyeing, deep color processing and finishing processing are performed to give a warp density of 198 yarns / inch and a weft density of 1
After finishing to 07 lines / inch, the obtained woven fabric was evaluated. The L value of Example 1 was 8.5, and a very high deep color was obtained.

(Comparative Example 1) A woven fabric was finished in the same manner as in Example 1 except that POY of polytrimethylene terephthalate was subjected to false twisting without a relaxation heat treatment.
The L value of Comparative Example 1 was 10.6, which was inferior to Example 1 in terms of deep color. (Comparative Example 2) A woven fabric was finished in the same manner as in Example 1 except that false twisting was performed using POY of polyethylene terephthalate instead of POY of polytrimethylene terephthalate. The L value of Comparative Example 2 was 9.8, which was inferior to Example 1 in terms of deep color.

[0022]

According to the present invention, it is possible to provide a composite processed yarn excellent in deep color.

Claims (1)

[Claims] 1. A polytrimethylene terephthalate multifilament multi-filament partially oriented undrawn yarn is subjected to a relaxation heat treatment at a temperature of 150 ° C. or less, and the polytrimethylene terephthalate yarn obtained and another multifilament are aligned and false-twisted. A method for producing a composite textured yarn.