JPH09241941A - Production of nylon woven fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a lightweight nylon woven fabric rich in bulkiness and having soft touch feeling by weaving a bulky yarn obtained by subjecting a specific modified hollow nylon multifilament to non-false twist crimping. SOLUTION: A nylon 6 chip is melt-spun to form a hollow nylon multifilament having lattice-like cross section, composed of plural projection parts 11 and hollow parts 12 and having 5-30% hollow ratio and 1.3 to 3.5 modified cross section degree. The modified hollow nylon filament is subjected to non-false type crimping by using a crimp box type processing machine to form a bulky processed yarn and the bulky processed yarn is arranged in weft and warp to produce the objective woven fabric.

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 nylon woven fabric which is lightweight and bulky, and has a soft feeling that is excellent in dry feeling and sharpness.

[0002]

2. Description of the Related Art Conventionally, nylon fabrics have less strength deterioration due to ultraviolet rays than polyester fabrics, have a bright hue due to dyeing, and can be subjected to high-order processing such as coating, so that they can be used for clothing such as windbreakers and ski wear. It is mainly used for sportswear such as. However, I dislike the texture with the unique slimy feel of nylon,
At present, it is rarely used for clothing such as casual wear. In recent years, there has been a strong demand for a material that has an improved texture with a unique slimy feel to nylon, and that also has functions such as light weight and heat retention, and that has an excellent wearing feeling.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is a lightweight and bulky nylon fabric having a soft texture which is excellent in dry feeling and sharpness. It is intended to provide a manufacturing method.

[0004]

The present invention attains the above object and has the following constitution. That is, in the present invention, the hollow ratio is 5 to 30%, and the irregularity is 1.3 to 3.
The non-false twist crimping process is applied to the nylon hollow multifilament yarn of irregular cross-section shape of 5 to form the bulky yarn,
The gist of the present invention is to provide a method for producing a nylon woven fabric, which is characterized in that the woven fabric is then woven using the processed yarn.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. In the present invention, first, as a fiber constituting a woven fabric,
A bulky processed non-false-twisted nylon hollow multifilament yarn with a hollow ratio of 5 to 30% and a degree of irregularity of 1.3 to 3.5 is used. The nylon hollow multifilament yarn referred to here may be made of a polyamide polymer capable of being melt-spun, and nylon 6
Fiber, nylon 66 fiber or the like is used. These fibers are
The third component may be added or copolymerized for the purpose of improving performance.

The hollow ratio of the nylon hollow multifilament yarn made of the polyamide polymer as described above is required to be 5 to 30% according to the following formula. Hollow ratio (%) = [A / (A + B)] × 100 (where A is the area of the hollow part and B is the area of the non-hollow part) When the hollow ratio is less than 5%, When the hollow ratio is larger than 30%, the weight is improved, but the melt spinning tends to be difficult and the spinnability tends to be inferior. Since it will decrease and wear resistance will weaken and a fibrillation problem will occur, sufficient caution is required.

As shown in FIG. 2, the degree of irregularity of the nylon hollow multifilament yarn is as shown in FIG.
1 can be represented by a value obtained by dividing the diameter D ₂ of the circumscribed circle of the whole by the diameter D ₁ of the inscribed circle.
It must be in the range of ~ 3.5. When the degree of irregularity is lower than 1.3, fine deformation is not formed on the outer peripheral portion of the fiber cross section, and the shape becomes close to the round cross-section shape of ordinary yarn, and the outer peripheral portion of the fiber cross section is finely deformed. Care must be taken because the dry feel and sharpness due to the cross-sectional shape is inferior, and the texture has a slimy feel unique to nylon. On the other hand, if the degree of irregularity is higher than 3.5, the feeling of dryness and crispness is excellent, but the wear resistance is weakened, which is not suitable.

When the fibers used in the present invention have a modified cross-sectional shape, the voids between the single yarns become large and the lightweight effect of the woven fabric is increased. In other words, by using a modified cross-section hollow fiber as the fiber, the weight is reduced due to the hollowness and the weight is increased due to the increase in the voids between the single yarns, thereby aiming at a further light weight effect. The cross-sectional shape of the nylon modified cross-section hollow multifilament yarn used in the present invention is, for example, as shown in FIG. 1 (a), a well shape having a protrusion 11 on the outer periphery and a hollow 12 inside. As shown in FIG. 1B, a shape having a protrusion 13 on the outer peripheral portion and a hollow portion 14 inside is preferably used, but other shapes may be used and are not limited to these shapes. Not a thing.

In the present invention, the above-mentioned nylon modified hollow cross-section multifilament yarn is subjected to non-false-twist crimping to form a bulky yarn. The non-false-twist crimping method referred to here is false-twist crimping. This is a processing method that adds crimping characteristics to a multifilament without adopting a bulky processing method. As such a non-false-twist crimping processing method, a crimp is created by treatment with a turbulent fluid of a high-pressure heating air jet. , A method of forming a crimp by injecting together with a filament into a colliding body of a needle-shaped rotary drum by a high-pressure heating fluid, and blowing the filament onto a gas-permeable moving collision surface such as a slit grid or a mesh by a high-pressure heating jet. A method of forming a crimp, a method of forming a crimp by passing through a gear while causing a filament to impinge on the gear with a heating jet, and a method of pressing a metal. Forcibly pushed into the box in viewing rollers, it can be mentioned a method in attaching a crimp.

As an example, as shown in FIG. 4, the yarn 7 taken out from the yarn supplying package 1 is passed through the first roller 2 and the second roller 3 and inside the crimp box 4 formed of a slit lattice having gas permeability. Is subjected to indentation crimping with a high-pressure heating air jet. At this time, the heat treatment temperature in the crimp box is preferably 190 to 280 ° C.
When the temperature is lower than 0 ° C, the crimping effect is deteriorated, resulting in lack of bulkiness and softness. Bulky heat treatment temperature is 280
If the temperature rises above ℃, the yarn will harden and the texture will become harder.
Not preferred. After processing, it passes through the interlacer 5 and is wound up on the cheese 6. When the yarn is crimped by performing heat treatment after twisting as in the false twist method, the hollow portion of the fiber is crushed and voids in the hollow portion are almost eliminated, and the lightness is lost. False twisting is inappropriate.

The single yarn fineness of the nylon multi-section hollow multifilament yarn is not particularly limited, but bulky and soft texture and light weight are obtained by bulky processing, and in addition, dry feeling and crispness are obtained. It is preferable that the single yarn fineness is 1 denier or more. In the present invention, a woven fabric is formed by using the nylon multi-section hollow multifilament yarn as described above. In this case, the woven fabric is woven by a usual method by using it as the warp or the weft, or both the warp and the weft. To do. As described above, it is possible to obtain a new nylon fabric that is lightweight, has a high bulkiness, and is excellent in a dry feel and a sharp feel, and has a soft feel.

[0012]

The novel soft-textured nylon fabric of the present invention comprises a hollow multifilament yarn of irregular cross-section in which the outer periphery of the cross-section of the hollow fiber is finely deformed, and the bulky-processed yarn is used to form the fabric. However, when the filament yarn is subjected to the non-crimping process to form the bulky yarn as in the present invention, when the crimp is applied to the filament yarn, fine deformation in the outer peripheral portion of the cross section of the hollow fiber is obtained. Since it is retained with almost no change, the fine deformation of the outer periphery of the cross section of the hollow fiber can give the woven fabric a dry feeling and a sharp feeling similar to the case of using the raw yarn. Since it can be retained with almost no change, the hollow effect of the hollow fiber and the void effect between the single yarns due to the irregular shape of the outer periphery of the fiber cross section are synergistically added, and an excellent lightweight feeling is also obtained. As described above, the novel soft-textured nylon fabric of the present invention has the characteristics not found in conventional nylon fabrics in terms of texture and lightweight.

[0013]

EXAMPLES Next, the method for producing the novel soft-textured nylon fabric of the present invention will be described in detail by way of examples. The performance evaluation of the fabrics in the examples was carried out by the following method. (1) Lightness The thickness (mm) of the sample to be measured and the weight per square meter were measured, and the weight per square meter was divided by the thickness (mm) for evaluation. A smaller value indicates a lighter weight. (2) Feeling By sensory test by handling, bulkiness, softness,
The dry feeling and the crisp feeling were relatively evaluated in the following three grades. ◎: Very good ○: Good ×: Poor

Example 1 Relative viscosity (1 g / 100 ml, 98% H ₂ SO
₍₄ , 25 ° C) using a nylon 6 chip of 3.4, a spinning speed of 4150 m / min, a draft of 1.25 and a fineness of 60.
d, the number of filaments was 16, the single yarn fineness was 3.75 d, the hollow ratio was 20%, and the irregularity was 1.8 to obtain a nylon hollow multifilament yarn having a well-shaped cross section as shown in FIG. Next, using a crimp box type processing machine as shown in FIG. 4, the well-shaped hollow nylon multifilament yarn was subjected to a yarn speed of 1600 m / min, a roller 3 temperature of 160 ° C.
The crimp box 4 was crimped under the conditions of a temperature of 240 ° C. and an air pressure of the crimp box of 5.0 kg / cm ² .

Using this well-shaped hollow nylon multifilament yarn for both warp and weft, the warp density is 162 yarns /
Weaving 2/2 twill with inch and weft density of 95 threads / inch. Next, after scouring this woven fabric in a low tension type spreading scouring machine by a conventional method,
The usual presetting and spreading dyeing were performed, and the finishing setting was performed with a pin tenter. Thus, a nylon fabric of the present invention having a warp density of 178 yarns / inch and a weft density of 103 yarns / inch was obtained.

For comparison with the present invention, a spinneret having a round cross-section as shown in FIG. 3 (a) was used in place of the nylon hollow multifilament yarn having a modified cross-section in this example, with a fineness of 72d and a filament. Number 16 lines, single yarn fineness
A nylon woven fabric (Comparative Example 1) was obtained by the same method as in Example 1 except that nylon multifilament yarn having a round cross section with a hollowness of 0.5 d and a hollowness of 0% and a degree of irregularity of 1.0 was spun.

For comparison with the present invention, a spinneret having a non-hollow well-shaped cross-section shown in FIG. 3 (b) is used in place of the nylon hollow multifilament yarn having the well-shaped cross section in this example. Use, fineness 72d, filament number 1
Nylon non-hollow multifilament yarn having a well cross-sectional shape of 6 yarns, a single yarn fineness of 4.5 d, a hollowness rate of 0%, and a degree of irregularity of 1.8 was spun in the same manner as in Example 1 to obtain a nylon woven fabric ( Comparative example 2) was obtained.

The performances of the present invention and the nylon fabric for comparison were measured and evaluated, and the results are shown in Table 1.

[0019]

[Table 1]

As is clear from Table 1, the nylon fabric produced by the method of the present invention has excellent lightness, softness, bulkiness,
It can be seen that it is excellent in dry feeling and sharpness. On the other hand, Comparative Example 1 uses an ordinary round cross section yarn having a degree of deformation of less than 1.3, and is inferior in lightness, softness, dryness and sharpness. No. 1, which uses a non-hollow well cross-section yarn, has good bulkiness, dry feel, and crispness, but is inferior in lightness and softness.

Example 2 Relative viscosity (1 g / 100 ml, 98% H ₂ SO
₄ , 25 ° C) using a nylon 6 chip of 3.4, spinning speed 4000 m / min, draft 1.25, fineness 50
A nylon hollow multifilament yarn having a well-shaped cross section as shown in Fig. 1 (a) having 0d, 96 filaments, single yarn fineness of 5.2d, hollow ratio of 25% and irregularity of 1.8 was obtained. Next, using this crimp box type processing machine as shown in FIG. 4, a yarn speed of 1600 m / min, a roller 3 temperature of 170 ° C.
Crimping was performed under the conditions of the temperature of the crimp box 4 being 240 ° C. and the air pressure of the crimp box being 6.0 kg / cm ² .

Using this well-shaped hollow nylon multifilament yarn for both warp and weft, the warp density is 46 yarns / inch,
A weave fabric having a weft density of 38 threads / inch was woven. Next, this woven fabric was scoured by a low tension type spreading scouring machine by a conventional method, then subjected to ordinary presetting and spreading dyeing, and finishing set with a pin tenter. In this way, the warp density is 55 threads /
A nylon woven fabric of the present invention having a inch and a weft density of 47 threads / inch was obtained.

For comparison with the present invention, a spinneret having a non-hollow well-shaped cross-section shown in FIG. 3B was used in place of the nylon hollow multifilament yarn having the well-shaped cross section in this example. Fineness 625d, filament number 96
The same procedure as in Example 2 was repeated except that a nylon non-hollow multifilament yarn having a well-shaped cross section with a single yarn fineness of 6.5 d, a hollow ratio of 0%, and a degree of irregularity of 1.8 was used for comparison. A nylon fabric (Comparative Example 3) was obtained.

The performances of the nylon fabric of the present invention and the comparative nylon fabric were measured and evaluated, and the results are shown in Table 2 together.

[0025]

[Table 2]

As is clear from Table 2, the nylon fabric of the present invention has excellent lightness, softness, bulkiness, dryness,
You can see that it is excellent in sharpness. On the other hand, Comparative Example 3 uses a non-hollow well-shaped cross-section yarn having a degree of irregularity of 1.8, and has good bulkiness, dry feeling, and crispness, but is lightweight and soft. It was inferior.

[0027]

EFFECTS OF THE INVENTION According to the present invention, it is possible to obtain a unique new soft-feeling nylon fabric which is excellent in lightness, softness, bulkiness, dryness, and sharpness.

[Brief description of drawings]

1A and 1B are cross-sectional views of an example of a modified cross-section hollow fiber used in the nylon fabric of the present invention.

FIG. 2 is an explanatory diagram for defining the degree of irregularity referred to in the present invention using the irregular cross-section fiber shown in FIG.

3A and 3B are cross-sectional views of non-hollow fibers used in a nylon fabric for comparison with the present invention.

FIG. 4 is a schematic process drawing showing an example of a non-false-twist crimping method for yarn used in the present invention.

[Explanation of symbols]

 1 Yarn Supply Package 2 1st Roller 3 2nd Roller 4 Crimp Box 5 Interlacer 6 Winding Bobbin 11 Projection 12 Hollow 13 Protrusion 14 Hollow

Claims (1)

[Claims] 1. A hollow ratio of 5 to 30% and a degree of irregularity of 1.3 to 3.
The non-false twist crimping process is applied to the nylon hollow multifilament yarn of irregular cross-section shape of 5 to form the bulky yarn,
Then, a method for producing a nylon woven fabric, which comprises weaving a woven fabric using the processed yarn.