JP2002309463A - Cloth made of hollow polyamide fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cloth made of a hollow polyamide fiber, having a unique feeling with excellent luster, high strength, extremely light weight and heat- insulation and suitable for outer wear in general, inner wear, uniform in general, industrial material, etc. SOLUTION: The cloth is made of a hollow polyamide fiber free from titanium oxide, having a fiber strength of >=54 CN/dtex and containing a triangular hollow part having an out-of-roundness of 1.2-1.6 and a hollowness of 10-40%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a ripstop texture fabric which uses a hollow polyamide fiber as a warp and a weft to form a lattice pattern, has a unique texture excellent in glossiness, and has high strength. , Super light weight and excellent heat retention,
The present invention relates to a fabric made of a hollow polyamide fiber suitable for use in outerwear, innerwear, uniforms, and materials.

[0002]

2. Description of the Related Art Fabrics made of polyamide fibers have a strong need for good texture in clothing products, and particularly demands for glossiness and lightness. Known means for improving the texture and weight reduction of clothing products include means by dyeing methods and devising the structure of the fabric, but it is difficult to greatly improve these means of processing. In addition, generally used solid yarns of 33 dtex and 44 dtex are used for the warp and the weft, and the lip-stop structure woven fabric that forms the lattice pattern has a poor texture and heat retention, and has a problem that the woven fabric becomes heavy. There was a problem in using it for outer clothing products.

[0003] Therefore, improvement of the fiber itself has been studied from the viewpoints of texture, light weight, heat retention, and the like. There is a difficult problem.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a general outer garment, innerwear, and uniform which have a unique texture excellent in glossiness, high strength, super light weight and excellent heat retention. In general, an object of the present invention is to provide a fabric made of a polyamide hollow fiber suitable for uses such as materials.

[0005]

In order to achieve the above object, the present invention employs the following constitution. That is, (1) it does not contain titanium oxide, has a degree of deformation of 1.2 to 1.6,
Having a triangular hollow portion having a hollow ratio of 10 to 40%,
A fabric comprising hollow polyamide fibers having a fiber strength of 54 CN / dtex or more.

(2) The fabric according to the above (1), wherein the polyamide hollow fiber is formed of a polyamide polymer having a relative viscosity of 2.9 or more.

(3) The fabric according to (1) or (2), wherein the triangular shape of the hollow portion is substantially an equilateral triangle.

(4) The fabric according to any one of (1) to (3), wherein the outer diameter of the fiber cross section is substantially circular.

(5) The fabric according to any one of the above (1) to (4), wherein the hollow fibers of the polyamide are used for the warp and the weft to form a lattice pattern.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail.

In the method for producing a hollow polyamide fiber according to the present invention, a high-viscosity nylon having a titanium oxide concentration of 0% and containing substantially no titanium oxide has a melt viscosity of 1500 poise or more and a slit length / slit width ratio. Three of the slits 6 to 20 are melt-spun from discharge holes arranged in a triangular shape.

Further, in order to maintain the hollow shape, hollow ratio and high strength, it is preferably formed of a polyamide polymer having a relative viscosity of 2.9 or more, and more preferably 3.0.
The above is more preferable. If the relative viscosity is less than 2.9, it is difficult to obtain a hollow polyamide fiber having a hollow ratio of 10% or more.

Further, considering the point of obtaining ultra-light weight and heat retention, a preferable hollow ratio is 20 to 30%, and a relative viscosity of 3.1 or more is required to obtain this hollow ratio. Is preferred.

Here, the polyamide may be nylon represented by nylon 6 or nylon 66, or a copolymer or a mixture mainly composed of nylon.

The hollow portion of the hollow fiber is generally triangular, preferably an equilateral triangle, but may be triangular (diaper-shaped) formed from a curved surface bulging outward.

At this time, the triangular shape of the hollow portion has a deformation degree expressed as a ratio of the shortest distance from the center of gravity of the hollow portion to the outer periphery of the hollow portion in the range of 1.2 to 1.6. I need to do that. If the degree of deformation is less than 1.2, the hollow portion is likely to be crushed, and it is difficult to have a high glossiness. On the other hand, if the degree of deformation exceeds 1.6, the hollow portion is liable to be crushed, and a kind of glaring is generated in the fiber, so that an excellent texture cannot be obtained.

The area occupied by the hollow portion in the cross section of the hollow fiber, that is, the hollow ratio, must be in the range of 10 to 40%. When the hollow ratio is less than 10%, it is difficult to have a high glossiness, and the effect of light weight and heat retention for clothing is insufficient. Also, the higher the hollow ratio,
It is preferable because a high glossiness can be obtained and the lightness and heat retention are enhanced. However, if it is too high, the fiber cross section is likely to be crushed in the high-order processing step. Therefore, it is important that the hollow ratio is 40% or less. In particular, a hollow ratio of 20 to 30% is preferable.

Further, in order to prevent the cross section of the fiber from being crushed by the pressure from the lateral direction of the fiber, the strength is increased;
That is, the strength is set to 54 CN / dtex or more, and particularly, the strength is preferably 60 CN / dtex or more.
If the strength is less than 54 CN / dtex, the strength required for the final fiber product is insufficient, and the durability is poor. In particular, the hollow portion is easily crushed and the hollow portion wall is easily ruptured, so that the obtained fiber product cannot maintain a desired hollow ratio.

The outer peripheral shape of the polyamide hollow fiber is preferably circular, but may be triangular or other polygonal.

The polyamide hollow fiber thus obtained can be post-processed in the same manner as ordinary polyamide fiber.

[0021] Such a woven fabric uses a polyamide hollow fiber yarn obtained at level 1 for warp and weft, uses a water jet loom, and has a woven fabric having a structure constituting a lattice pattern in order to increase tear strength. Preferably, a rip-stop structure using a polyamide hollow fiber yarn as a warp and a weft and having a rip-stop portion forming a lattice pattern is preferable.

The greige machine obtained is usually dyed and finished. As a result, it has an ultralight weight with excellent tear strength, a unique texture and heat retention.

In the present invention, the fabric made of the hollow polyamide fiber is constituted by a woven fabric, a knitted fabric, a nonwoven fabric, or the like.

Further, in the present invention, it is preferable that the fabric is made of 100% of the above-mentioned polyamide hollow fiber, but it may be a mixture of other fibers as needed.

The use of such a woven or knitted fabric is as follows: (1) Outer garments (jackets, vests, skirts, slacks, etc.) are preferable because the effects of the present invention can be maximized.

The composition total fineness is 17 dtex to 44 dtex
Can be used. Especially 17dtex ~ 33dte
The thing of x is preferable from a unique texture and super light weight.

(2) Innerwear in general (petticoat,
Caissole, shorts, etc.) are also preferable because the effects of the present invention can be maximized. The composition total fineness can use 17 dtex-44 dtex.
The form is preferably knit, the knitting structure is interlock,
Mock Milan ribs, India, etc. are preferred.

(3) Uniforms (work clothes, office uniforms, etc.) are also preferable because the effects of the present invention can be maximized. Total composition fineness is 56 dte
x to 440 dtex can be used. Especially 122
Those having dtex to 190 dt are preferable from the viewpoint of texture and heat retention.

(4) For materials (lining, interlining, tent fabric)
Is also preferable because the effects of the present invention can be maximized. Constitution total fineness is 33dtex-167dte
x can be used. Especially 33dtex ~ 122d
Tex is preferred from the viewpoint of texture, heat retention and ultra-light weight.

According to the present invention, there is provided a fabric made of a polyamide hollow fiber which has a unique feeling excellent in glossiness, has high strength, is super lightweight and has excellent heat retaining properties. It is.

[0031]

EXAMPLES The present invention will be described below with reference to examples.

The methods for measuring the physical properties shown in the examples are as follows.

1. Relative viscosity After the sample is weighed, it is dissolved in concentrated sulfuric acid (98.0%).
The 0.5% by weight solution was heated at 25 ° C. using an Ostwald viscometer.
Measure with

2. Fiber strength Measured using "Tensilon" manufactured by Orientec. A load of 1/30 g of the yarn fineness is applied as the initial load, and the measurement is performed under the conditions of a yarn length of 50 cm and a pulling speed of 50 cm / min to determine the maximum tenacity.

3. Degree of deformation of hollow portion From the cross-sectional photograph of the fiber, the longest distance (L1) and the shortest distance (L2) from the center of gravity of the hollow portion to the outer periphery of the hollow portion were obtained.
It is calculated by the following equation.

Deformation degree of hollow portion = L1 / L2 Hollow ratio From the cross-sectional photograph of the fiber, the cross-sectional area of the hollow portion and the cross-sectional area of the outer periphery of the fiber are determined, and are calculated by the following equation.

Hollow ratio (%) = (cross-sectional area of hollow portion / cross-sectional area in outer periphery of fiber) × 100 Gloss The gloss is measured using a three-dimensional variable angle photometer manufactured by Jonan Seisakusho. The incident angle is set to 45 degrees and the reflection angle is set to 45 degrees, the sample is rotated 360 degrees in the plane of the incident / reflective surface perpendicular to the sample, and the reflection intensity is obtained as a percentage with respect to the magnesium oxide white plate.

6. Heat retention Fabric: 10 cm × 10 cm, measured at 40 ° C., power consumption after 10 minutes.

The measuring instrument uses KES-FB7.

The heat consumption of the heater is such that the dough does not release the body temperature (set at 40 ° C.). The lower the power consumption, the higher the heat retention.

Heat retention of dough = (Wo−W1 / Wo) × 10
0, where Wo: power consumption when the fabric is not covered (watts) W1: power consumption when the fabric is covered (watts) Tear strength of work cloth Measured according to JIS 1096, 101b by the Pendulum method using an Elmendorf-type tear strength tester.

8. The weight of the mass per unit area of 1m ² per work cloth using the balance measurement.

Example 1 <Spinning> Two types of ε-caprolactam were polymerized by a conventional method to give a relative viscosity of 3.2 and a titanium oxide content of 0% (none) or 0.38%. Nylon polymers are produced, and these polymers are melted and discharged from a spinneret at a spinning temperature of 280 ° C. and a melt viscosity of 2000 poise, then cooled by a usual method, and lubricated so as to have an oil adhesion of 0.4% by weight. Minutes picked up, followed by 2.78
Stretched twice and wound up at 2500 m / min. 66 dtex2
Four filament hollow fibers were produced.

<Weaving / Dyeing> The nylon hollow fiber yarn obtained at the level 1 in Example 1 has a constituent fineness of 28 dtex and a single fiber thickness of 2.3 dtex for the warp and the weft, and the water shed room is used. For the purpose of obtaining excellent tear strength, the structure is a ripstop structure constituting a lattice pattern, and the weave density is 143 warp / 2.54 cm, width 1
It was set to be 43 lines / 2.54 cm. The obtained greige was prepared using an acid dye and the finishing density was 154 / vertical.
It was dyed and finished in 2.54 cm, 151 horizontal / 2.54 cm gray. The results are shown in Table 1.

COMPARATIVE EXAMPLE 1 0.38 Titanium oxide was added to the original yarn.
According to Example 1, except that wt% was added,
Weaved, dyed and finished. The results are also shown in Table 1.

Comparative Example 2 A yarn was formed, woven, dyed, and finished in accordance with the Example, except that a normal nylon multifilament which was not a hollow fiber of titanium oxide (solid yarn) was used. The results are also shown in Table 1.

The above results are summarized in Table 1.

[0048]

[Table 1]

Example 2 The yarn of Example 1 was used to form a circular knit with an interlock (32 G × 36 inches). Then, it was dyed pink at 98 ° C. for 60 minutes with an acid dye and finished. The finished product was a nice smooth knit fabric with high gloss, super light weight and high strength.

[Evaluation Results] As described above, the present invention provides an extremely excellent gray nylon lip having a unique texture excellent in glossiness, high strength, ultra-light weight and heat retention, which has never existed before. A fabric is obtained. In addition, weaving properties and workability could be processed smoothly without any problem.

Comparative Example 1 was poor in gloss and poor, and Comparative Example 2 was heavy and poor in heat retention.

[0052]

According to the present invention, no titanium oxide is contained.
By using a triangular hollow polyamide fiber with a hollow ratio of 10 to 40%, it has a unique texture excellent in glossiness, high strength, ultra-lightweight and extremely excellent polyamide woven / knitted material with heat retention. Since it can be obtained, it is preferable to use it for the whole outer garment, the whole inner, the whole uniform, the base cloth for materials, etc., since the effect of the present invention can be maximized. In addition, two layers of outer clothes, 3
By substituting the product of the present invention for the layered product and the four-layered product, it is possible to obtain an ultra-lightweight garment, and a wide range of development is also expected.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4L002 AA06 AB02 AC00 DA04 EA00 EA01 FA02 FA03 FA06 4L035 BB31 DD03 DD05 EE08 HH10 4L048 AA24 AA39 AB07 AC00 AC08 BA05 CA00 CA10 DA03 DA24 EA01 EB00

Claims (5)

[Claims] (1) not containing titanium oxide and having a degree of deformation of 1.2 to
1.6. A fabric comprising a polyamide hollow fiber having a triangular hollow portion having a hollow ratio of 10 to 40% and a fiber strength of 54 CN / dtex or more. 2. The fabric according to claim 1, wherein the polyamide hollow fiber is formed of a polyamide polymer having a relative viscosity of 2.9 or more. 3. The fabric according to claim 1, wherein the triangular shape of the hollow portion is substantially an equilateral triangle. 4. The fabric according to claim 1, wherein the outer diameter of the fiber cross section is substantially circular. 5. The fabric according to any one of claims 1 to 4, wherein the hollow fibers of the polyamide are used for the warp and the weft and have a structure constituting a lattice pattern.