JPS602727A - Synthetic fiber yarn having pattern and production thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a special surface-treated yarn using a thermoplastic synthetic fiber yarn such as polyester or polyamide, and a method for producing the same.

Problems with the prior art The melt-spun synthetic fiber yarn has a monotonous cross-section and surface shape, and many methods have been proposed to improve and diversify this problem. One proposal that is very similar to the present invention is, for example, the pressure roller treatment of synthetic fiber threads described in Japanese Patent Publication No. 50-35599. Although the purpose of this method is partially in line with the purpose of the present invention,
This method imparts unevenness to the filaments by pressing the intersections of the filaments.

It was difficult to control the size of the unevenness, the number of the unevenness, and the regularity of the unevenness in the length direction of the filament. As another approximation, there is a technique in which fine particles are mixed in synthetic fiber yarn in advance, formed into a fabric, etc., and then the fine particles are eluted to impart fine irregularities to the fiber surface. This method has the disadvantage that only extremely fine particles can be mixed in, so the resulting irregularities are too fine and have little effect on the feel of the fabric.

C. Purpose of the present invention The purpose of the present invention is to improve the monotony of the surface shape of melt-spun synthetic fiber yarns, to have appropriate bulge, drapability, and elasticity, and to improve the waxy feeling. The present invention provides a fiber yarn and a method for producing the same.

20 Structure of the present invention The present invention consists of the following configuration.

(1) In the synthetic fiber filament yarn to which an indentation has been applied, at least one surface of the constituent filaments has a concavo-convex pattern with a size equal to or less than the maximum diameter of the filament,
A synthetic fiber yarn having a pattern, characterized in that the filament has a embossed portion in the longitudinal direction of the filament.

(2) When a synthetic fiber filament thread is subjected to heat treatment while being relaxed, and immediately after the heat treatment, it is passed through a hard pressure roller to impart an impression to the thread.

A method for producing a synthetic fiber yarn having a pattern, characterized in that a roller having a concavo-convex shape with a diameter smaller than the maximum diameter of the constituent filaments is used as a pressure roller. In the present invention, the synthetic fiber yarn may be any known thermoplastic synthetic fiber filament yarn, but preferably polyamide or polyester filament yarn.

This is due to its ease of processing and low cost.

The uneven pattern is embossed in the longitudinal direction on at least one surface of the filament, and its size must be less than or equal to the maximum diameter of the constituent filaments. Unless the size of the pattern is less than or equal to the maximum diameter of the constituent filaments, it will not be possible to obtain a pattern with fine pitch and depth, which will result in poor gloss and
This is due to the inability to create an excellent texture. Here, the constituent filament refers to one filament that constitutes the yarn. Further, if the filament has a perfect circular cross-sectional shape, its maximum diameter will be equal to the diameter of the circle, and if it is elliptical, its major axis will be its maximum diameter. The size of the concavo-convex pattern refers to the length and width dimensions of one concave or convex portion, which must both be equal to or less than the maximum diameter of the filament. The recesses or protrusions must be present on at least one surface of the filament. It is undesirable for there to be a portion of 1 to 5 m11 or more along the length where no uneven pattern is present.

It is desirable that a recess or protrusion always exist within a length range five times the size of one recess or protrusion.

Next, in the method of the present invention, the heat treatment is performed on the synthetic fiber yarn in a relaxed state, and the heat treatment temperature must be above the glass transition point and below the melting point of the synthetic fiber yarn.
The range is from (melting point -50°C) to (melting point -20°C). It is preferable that the relaxation rate is 5 or more and 60 or less. The size of one of the irregularities attached to the grafting surface must be within a range that does not exceed the maximum diameter of the filament, but it is between 1 and 1.
It is preferable that the thickness is 0 μm. As a method of periodically adding the unevenness, several groups of unevenness can constitute one repeating unit, and one to a plurality of repeating units f: can be attached on the welding surface of the pressure roller.

The pressure roller may be a metal roller such as iron or a ceramic such as alumina porcelain, and in short, it may be a hard roller that can provide unevenness.

In the method of the present invention, it is desirable to use ceramics having a Pinkers hardness of 1000 or more as the pressure roller because of its excellent wear resistance and durability. Further, as for the pressure, a linear pressure of about 01 to 100 kg/cm can be used.

Next, it will be explained using drawings.

FIG. 1 shows an apparatus for explaining the method for producing synthetic fiber yarn of the present invention. The synthetic fiber yarn 1 passes through a tension device 2, is pulled out by a yarn feeding roller 6, and is heat-treated by a heater 4 between it and a pressure roller 5. Here, the pressure roller 5 is preferably composed of a pair of upper and lower rollers, both of which are actively driven at the same speed. Furthermore, the pressure roller is made of a hard material, and at least one of the welding surfaces is periodically provided with irregularities smaller than the maximum diameter of the filament. The synthetic fiber yarn is pressurized by this pressure roller 25, and the unevenness on the surface of the roller is embossed on the filament surface, and the filament is wound into a winder B.

FIG. 2 shows an example of the surface shape of the pressure roller used in the method of the present invention. In FIG. 2, the shaded portion is formed in a concave shape, and A indicates the length of one side of the concave portion, B indicates the width of the concave portion, and C indicates the interval or pitch between the concave portions.

FIG. 6 shows an example of a thread having a pattern according to the present invention, in which a portion F pressed by the concave pattern of the roller is regularly formed among a portion G in contact with the pressure roller surface. In addition, B is the part that is not embossed by the pressure roller, and D
is the part where the constituent filaments intersect and are pressed.

E6 Effects of the Present Invention The uneven pattern of the synthetic fiber yarn of the present invention causes subtle changes in the surface morphology in the longitudinal direction of the filament. That is, first, let us discuss the reflection of light on the fiber surface.Secondly, in the case of the synthetic fiber yarn of the present invention.

The light incident on the uneven portions is not reflected in a specific direction but is scattered, so that the fabric made of the threads has a soft luster. Next, the fabric made of the yarn of the present invention is freed from the waxy feel peculiar to synthetic fibers. This is because the uneven pattern roughens the surface of the yarn to an appropriate degree, resulting in a smooth and supple touch.

Sixthly, because of the uneven pattern of the yarn of the present invention, the filaments separate from each other and the fabric has an appropriate amount of fullness. Fourth, the uneven pattern changes the bending stiffness of the filament in the length direction of the filament and in the direction in which the filament is bent. In other words, if we look at the recess.

Compared to other parts, that part is easier to bend in the direction perpendicular to the recessed part surface, and difficult to bend in the parallel direction.

This gives it a desirable feel (drapeability and appropriate tension) as if it were a yarn made by mixing filaments with different bending stiffnesses.

Fifth, since the unevenness is periodically embossed, there is little unevenness in the unevenness, and there is an advantage that there is no significant unevenness in quality in the length direction of the yarn. Sixth, since the pattern consists of concave or convex portions that are asymmetrical with respect to the axis perpendicular to the filament axis, the resistance to friction in the longitudinal direction of the yarn differs.

1. Clothing performance can be improved by selecting the direction of the pattern relative to the direction of the fabric or the direction of the pattern cut during sewing.

It can improve the tactile sensation, etc. In addition, when worn, the area that comes into contact with the skin becomes larger, which improves sweat absorption. In addition, when knitted into a single thin fabric, the improved yarn-system friction prevents seam misalignment and maintains a sharp woven/knitted structure.

Next, according to the method of the present invention, it is possible to efficiently produce synthetic fiber yarn having the periodic pattern described above,
The device is also extremely simple.

Furthermore, the heat treatment conditions were changed, the pressure of the hard pressure roller,
Various uneven patterns can be imparted to the filament by changing the pattern attached to the suction surface.

This will be explained below using examples.

Example 1 An experiment was conducted using the apparatus shown in Fig. 1. Q-supplied yarn: polyester drawn yarn, 75 denier 36 filament, triangular cross section, bright variety Processing speed: OOm/min Heak temperature: 220°0 Relaxation X: 25 pressure roller: length 5 μm on the iron roller surface (A).

Ceramic pressing force 2.5 kg/Cm with T-shaped recesses formed by two lines with a width of 1 μm (B) attached at an interval of 10 μm (C) Obtained synthetic fiber yarn and supplied yarn (comparison product) The fabric was knitted with a 28-gauge interlock structure and dyed.

Compared to comparative products, the knitted fabric using the synthetic fiber yarn of the present invention had a soft luster, a single color, and a deep depth, and had a suitable bulge with good drapability and a desirable texture. . It was also very dry to the touch.

[Brief explanation of drawings]

Figure 1 shows the method for producing synthetic fiber yarn of the present invention. FIG. 2 shows an example of the surface shape of the roller, and FIG. 3 shows an example of the thread surface shape of the obtained pattern. 1: Filament yarn 2: Tensor 4: Heater 5: Pressure roller: Feed roller 6: Winding pirn A: Length B: Width C: Spacing D: Concave part due to intersection E: Direct contact with pressure roller or filament yarn Non-patterned portion F: Pattern convex portion G: Part directly in contact with the pressure roller Patent applicant Azuma Co., Ltd.

Claims (3)

[Claims] (1) In a synthetic fiber filament thread that has been given an indentation, at least one surface of the constituent filaments has an uneven pattern with a size smaller than the maximum diameter of the filament, and is embossed in the length direction of the filament. A synthetic fiber yarn having a pattern characterized by having. (2) A synthetic fiber filament having a pattern according to claim (1), wherein the pattern consists of concave folds or convex portions having an asymmetrical shape with respect to an arbitrary axis orthogonal to the filament axis. (3) When a synthetic fiber filament yarn is subjected to heat treatment while being relaxed, and immediately after the heat treatment, it is passed through a hard pressure roller to impart an indentation to the yarn. A method for producing a synthetic fiber yarn having a pattern, characterized in that a roller having a concavo-convex shape with a diameter smaller than the maximum diameter of the constituent filaments is used as a pressure roller.