JPH06299430A - Production of spontaneously stretching textured yarn - Google Patents

Abstract

PURPOSE:To provide textured yarn effective for imparting woven fabric with bulky and silk-like feeling. CONSTITUTION:The spontaneously stretching textured yarn is produced by parallelly arranging partially oriented undrawn polyester multifilament yarn having a birefringence DELTAn of 0.02-0.08 and another multifilament yarn, introducing the yarns into a fluid jet nozzle to effect the disturbance and entanglement of the partially oriented undrawn polyester multifilament yarn with the other multifilament yarn and subjecting the product to relaxed heat-treatment at <=150 deg.C.

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 spontaneously stretchable textured yarn.

[0002]

2. Description of the Related Art Spontaneous stretchable and mixed yarns, which are interlaced yarns of spontaneously stretchable and heat-shrinkable yarns, give a silky-like texture with a sense of fluffiness as compared with conventional so-called heterogeneous shrinkage and mixed yarns. However, a product with a rich sense of fluffiness is required.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a spontaneously stretchable textured yarn which is richer in fluffiness than conventional yarns.

[0004]

[Means for Solving the Problems] That is, according to the present invention, a polyester multifilament partially oriented undrawn yarn having a birefringence (hereinafter referred to as Δn) of 0.02 to 0.08 and another multifilament are aligned and fluid ejected. A method for producing a spontaneously extensible textured yarn, which comprises supplying to a nozzle, disturbing the polyester multifilament partially oriented undrawn yarn and other multifilaments to entangle them, and then performing a relaxation heat treatment at a temperature of 150 ° C or less. ,.

The spontaneously stretchable processed yarn obtained by the production method of the present invention is a part of a polyester multifilament partially oriented undrawn yarn (hereinafter referred to as polyester multifilament POY) which has a function of spontaneous elongation, and is a polyester multifilament POY. It has a yarn structure that is uniformly mixed with other multifilaments at the single-filament filament level.
Compared to the spontaneously extensible mixed fiber having a certain number of entanglements, it has a richer sense of fluffiness.

Further, compared to the so-called Taslan-processed yarn supplied to the fluid jet nozzle instead of the interlaced mixed fiber, the degree of mixed fiber at the single-filament filament level is large and the feeling of fluffiness is rich. The reason for this is not clear, but the positions of the core portion and the sheath portion of the polyester multifilament POY and the other multifilament are sequentially switched during the fluid jetting, the relaxation heat treatment, and the dyeing finishing step after weaving, and as a result, the result is that It is considered that sufficient mixing at the filament level is achieved.

Japanese Patent Laid-Open No. 165037/56 discloses that a polyester multifilament POY is subjected to Taslan processing and then subjected to relaxation heat treatment. The heat treatment condition disclosed is 180 ° C., which is higher than that of the present invention. However, it is not possible to impart spontaneous stretchability by such a relaxation heat treatment at such a high temperature, and a woven fabric rich in fluffiness cannot be obtained.

In the present invention, the polyester multifilament POY means 2000 m / min or more, preferably 2500
A polyester multifilament yarn spun at a winding speed of up to 4000 m / min. The Δn of the polyester multifilament POY used in the present invention is 0.02 to 0.
The polyester multifilament POY having a value of 08, more preferably 0.03 to 0.05 and having an Δn outside this range does not serve as a spontaneously stretchable processed yarn.

In the present invention, Δn is a sample in which polarized light is transmitted, and the refractive index n‖ of the sample in the fiber axis direction and the refractive index n⊥ in the direction perpendicular to the fiber axis are measured, and Δn = (n‖ -N
Represented by ⊥). The crystallinity of the polyester multifilament POY is preferably 30% or less.

The polyester multifilament POY used in the present invention is preferably a cationic dyeable polyester,
Further, polyester to which an antistatic agent, a matting agent or the like is added is preferable. The polyester multifilament POY used in the present invention preferably has a hollow portion continuously extending along the length direction of the single yarn filament, and has a noncircular cross section of triangular to octagonal. The denier of the single yarn filament is preferably 1 to 4 denier, and the total denier of the polyester multifilament POY is 50 to 1
50 denier is good.

In the production method of the present invention, the above-mentioned polyester multifilament POY may be stretched at a temperature below the glass transition point, for example, about 1.2 to 1.5 times at room temperature and then aligned with other multifilaments. . When stretched at a temperature exceeding the glass transition point, a spontaneously stretchable processed yarn cannot be obtained. As the other multifilaments aligned with the polyester multifilament POY used in the present invention, thermoplastic synthetic fiber multifilaments are preferable, and polyester multifilaments are particularly preferable. Further, cationic dyeable polyester, antistatic agent, matting agent, etc. are added. Preferred are polyester multifilaments.

For example, a normal polyester multifilament having a single yarn denier of 0.5 to 6 denier, a polyester multifilament POY having an Δn different from that of the above-mentioned polyester multifilament POY, 6000 m
/ Min. Spin take-up method in which spinning is performed at a winding speed of preferably 7,000 m / min or more, or spin draw-up in which spinning, drawing and winding are performed in a series of steps at a winding speed of 4000 m / min, preferably 5000 m / min or more. So-called high-speed spinning polyester multifilaments obtained by the method and their cold drawn yarn and boiling water shrinkage ratio of 6 to 30.
%, High-shrinkage yarns, so-called different-shrinkage mixed yarns composed of such high-shrinkage yarns and low-shrinkage yarns, and the like, and one kind or two or more kinds thereof may be mixed.

In the present invention, "aligning and supplying" means simultaneously supplying or supplying with a feed rate difference (preferably about 2 to 30%), and particularly, the feed rate of polyester multifilament POY. It is preferable to supply with a larger value because the degree of fiber mixing increases. As the fluid ejection conditions, the polyester multifilament POY preferably has a feed rate of about 15 to 40%, and other multifilament feed rates of 5 to 15%.
Water may be supplied to one or both of the supplied yarns in a certain degree. The pressure of air normally used as a fluid is preferably about 4 to 8 kg / cm ² G.

The relaxation heat treatment condition is 150 ° C. or lower,
It is preferably 110 to 150 ° C. If the temperature exceeds 150 ° C, the object of the present invention cannot be achieved. Heat treatment time is 0.2 ~
0.8 second is preferable, and 0.3 to 0.6 second is particularly preferable. The relaxation rate of the relaxation heat treatment may be appropriately selected depending on the state of disturbance and entanglement between the polyester multifilament POY and other multifilaments, but preferably, the polyester multifilament POY has a yarn length of 15% or more as compared with that before the relaxation heat treatment. Preferably 15 more preferably
Relaxation rate of relaxation heat treatment is good so that it can shrink by -30%. For example, when the feed rate of polyester multifilament POY is increased and the feed rate difference is 15% or more, a relaxation rate of relaxation heat treatment of about 3 to 5% is preferable, and the feed rate of other multifilaments is increased. When supplied, a relaxation rate of about 15 to 30% is preferable.

The spontaneously stretchable processed yarn obtained by the production method of the present invention is most effective when it is used after being twisted at 200 T / m or more in the next step, and when producing a woven fabric,
Most effective when used for both warp and weft,
Other yarns, for example, original yarn of preferably sick and thin yarn, polyester mixed shrinkage mixed yarn, yarn containing spontaneously stretched yarn, ultrafine polyester multi with a single yarn denier of 0.1 to 0.8 denier It may be mixed with one or more of filament yarn and spin take-up yarn spun at a winding speed of 6000 m / min, preferably 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. In addition, after weaving, scouring and relaxing treatment are performed, and then alkali weight reduction processing with a weight reduction rate of about 5 to 30% is performed, dyeing and finishing processing are performed, and further, for example, emery paper,
Brushing such as so-called peach skin may be imparted by a brush, a needle cloth, or the like, and various finishing processes such as embossing and printing may be performed. Further, a finishing agent such as a softening agent, a water repellent, an antistatic agent may be used.

[0017]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to the examples.

[0018]

Examples 1 to 3 and Comparative Examples 1 to 3 75d / 48f polyester multifilament POY (Δn 0.04) spun at a winding speed of 3250 m / min and 75d / 48f regular polyester as another multifilament. Multifilament yarns (Δn 0.15) were aligned under the following conditions and supplied to the fluid injection nozzle, and then subjected to a relaxation heat treatment in a non-contact manner using a hollow heater under the following conditions to obtain a processed yarn. Fluid ejection conditions Feed rate: Polyester multifilament POY
Is 25%, regular polyester multifilament yarn is 5%, feed rate difference is 20% Injection pressure; 5 kg / cm ² processing speed; 150 m / min Water application; Regular polyester multifilament yarn only Relaxation heat treatment condition Heat treatment temperature; 110, 130, 5 levels of 150 ° C (Example), 160 ° C and 180 ° C (Comparative Example) Heat treatment time: 0.5 sec Relax ratio: 5% Additional twist of 1400 T / m is applied to the obtained textured yarn and used as a warp and weft yarn. With a warp density of 150 yarns / inch and a weft yarn density of 67 yarns / inch, a woven fabric with a satin (2 jumps) structure of 5 sheets is prepared, and scouring is relaxed and alkali weight loss (weight reduction rate is 10%).
Then, dyeing and finishing were performed to finish the warp density to 177 yarns / inch and the weft yarn density to 82 yarns / inch for evaluation.

110 processed under the relaxation heat treatment conditions of the present invention
C., 130.degree. C. and 150.degree. C. (Examples 1 to 3) are polyester multifilament POY and regular polyester multifilament yarn mixed at a single-filament filament level.
The single filament of Y was spontaneously stretched and floated on the surface of the fabric, and the fabric was rich in fluffiness, but it was outside the scope of the present invention at 160 ° C. and 180 ° C. (Comparative Example 1,
In 2), the polyester multi-filament POY was a yarn structure in which the regular polyester multi-filament yarn was located in the core part and the regular polyester multi-filament yarn was located in the sheath part.

As Comparative Example 3, spontaneously stretchable polyester multifilament yarn (spontaneous elongation rate at 130 ° C. 10
%) And a polyester multifilament yarn with boiling water shrinkage of 10% (interlaced number 50 / m)
As a result of evaluation in the same manner as in Examples 1 to 3, it was found that the feeling of fluffiness was inferior to that in Examples.

[0021]

Industrial Applicability According to the production method of the present invention, a spontaneously stretchable processed yarn having a silky-like feeling, which is richer in fluffiness than the conventional one, can be obtained.

Claims (1)

[Claims] 1. A polyester multifilament partially oriented undrawn yarn having a birefringence of 0.02 to 0.08 and another multifilament are aligned and supplied to a fluid jet nozzle, and the polyester multifilament partially oriented undrawn yarn is drawn. A process for producing a spontaneously stretchable processed yarn, which comprises disturbing the yarn and other multifilaments to entangle them, and then subjecting the yarn to relaxation heat treatment at a temperature of 150 ° C or lower.