JP2835358B2 - Fabric with excellent wearing feeling - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a fabric used for outer sportswear such as ski pants, athletic wear, leotard; inner nighty; casual wear such as slacks pants. It is.

(Prior art) Elastic fabric using polyurethane elastic yarn
Generally, it is widely used in fields requiring elasticity, such as innerwear and sportswear.

Here, a polyether-based polyurethane elastic yarn is often used, mainly because of its excellent hydrolysis resistance, heat resistance, and high power.

In addition, polyester-based polyurethane elastic yarns are frequently used in fields such as swimwear where chlorine resistance is required.

In recent years, demands for elastic fabrics are increasing, and users are not satisfied with a simple strength of power.

 In other words, ease of putting on and taking off; moderate body retention when worn; driving functionality and low clothing pressure when worn are more strongly required than ever before.

The ease of putting on and taking off means, in other words, a large marginal elongation, and the body retention is a property of holding the body in a desired form with a certain force when worn, and the motor functionality is The easiness of human body movement and also the adaptability to human body movement, and the clothing pressure refers to the contact pressure that presses against the body due to the elastic deformation of the covering due to the expansion and contraction of the skin.

Such physical properties are difficult to realize by a normal method in a fabric obtained from a material having a relatively high power and a low elongation, such as a polyether-based polyurethane elastic yarn generally used at present.

In particular, in order to obtain the above-mentioned new required physical properties with a conventional polyurethane elastic yarn, techniques such as employing a special weaving method using a plurality of polyurethane elastic yarns have been considered. The resulting fabric is extremely expensive, has poor productivity and can only be used for special applications.

In addition, since a polyester-based polyurethane elastic yarn can easily obtain a high elongation and low-power polyurethane elastic yarn, various tests have been conducted to obtain similar fabric physical properties. In addition to the poor hydrolysis resistance and heat resistance characteristic of the yarn, the lack of resistance to mold is a fatal drawback, and there is a great limitation in practical use.

(Problems to be Solved by the Invention) Accordingly, the present invention is intended to realize a fabric having physical properties that cannot be obtained with a conventional polyurethane elastic yarn by using a novel polyurethane elastic yarn.

(Means for Solving the Problems) The polyurethane elastic yarn used for the fabric of the present invention having excellent wearing feeling is: an organic polyisocyanate compound, a structural unit represented by the following structural formulas (A) and (B). made, and the following _{equation: 0.08 ≦ (M B) /} (M a + M B) having a composition satisfying ≦ 0.85, polyalkylene ether diol having a molecular weight of 300 to 30,000, (wherein, M _X is X = a, B Is the total number of structural units X present in the polyalkylene ether diol,
The structural units (A) and (B) may be present in the polyalkylene ether diol either randomly or in a block. _{) - (- CH 2 -)} 4 -O- ‥‥ (A) An active hydrogen-containing compound that reacts with an isocyanate group.

The polyurethane elastic yarn used in the present invention is significantly larger in breaking elongation than the conventional polyurethane elastic yarn,
It has small stress fluctuation for stretching in the practical stretching region, small hysteresis loss for stretching, and good recoverability at low temperatures.

The fabric of the present invention obtained by using the polyurethane elastic yarn having such physical properties can realize various advantages in physical properties which cannot be obtained by using the conventional polyurethane elastic yarn.

 That is, the elongation in both directions is large.

 The stress-strain curve in the practical region is flat.

 The ratio of the return power to the forward power is large.

 Good recoverability and small distortion at the time of stretch recovery.

The great feature that can be exhibited at the same time.

Since the fabric of the present invention has such physical characteristics, various problems at the time of wearing which cannot be realized by conventional products can be solved.

That is, the above (1) and (2) provide ease of attachment and detachment, and (2), (3) and (4) show that after supporting the body with a constant power, On the other hand, it is possible to obtain a feeling that the feeling of oppression is not given more than necessary, that is, it is possible to obtain a good exercise function at the time of wearing and a low clothing pressure.
Can provide moderate body retention.

In particular, athletic functionality and clothing pressure have a very large effect on the feeling of wearing, and are the most important points in sportswear that exercises a lot.

Motor functionality, which is an important factor of comfort, is evaluated as follows.

A graph showing the stress change when the fabric is stretched is called a STRESS-STRAIN curve (stress-strain curve, hereinafter abbreviated as SS curve). The rate of increase in stress with respect to the increase in elongation is defined as an index of motor functionality.

That is, in FIG. Is defined as the motor function index.

Here, A and B are the stresses when the fabric is stretched to a certain practical elongation.

X indicates the rate of increase in stress when the fabric is stretched from a certain elongation to a certain elongation.

The smaller this motor functionality index is, the smaller the change in stress with the movement of the body is, and it can be said that the fabric is “easy to move and is not tight”.

Next, the clothing pressure can be determined by measuring the vertical / horizontal simultaneous elongation observed in the actual skin elongation by biaxial elongation measurement.

The method of measuring the coating pressure obtained from the theoretical formula (when there is no clearance / shift) is; Is required.

The tensile test by a biaxial tensile tester was performed by a method using a measuring device shown in FIG. 2-1. Representative data obtained are shown in FIG. 2-2.

Clothing pressure is also measured by a clothing manometer. Since the actual human body is a double curved surface, the clothing pressure is related to both the horizontal and vertical tension of the cloth and the curvature of the human body at that point.

In FIG. 3, the body retention, which is another factor, is represented by a value obtained by dividing the return stress at a certain practical elongation having an SS curve by the forward stress.

Here, C indicates the forward stress when the fabric is stretched and recovered to a certain practical elongation, and D indicates the returning stress.

The ease of attachment / detachment is expressed by the elongation at 2.25 kg, which is close to the limit elongation obtained by actually stretching a strip of fabric cut to a certain width by hand.

The fabrics referred to in the present invention refer to 1-way and 2-way fabrics such as outer sportswear such as ski pants, athletic wear and leotards, and casual wear such as inner nighty wear and slacks pants.

Examples of the material used as the partner of the polyurethane elastic yarn of the present invention include general synthetic fibers such as nylon and polyester: regenerated fibers such as cupra and rayon: cotton, wool, and the like.
Natural fibers such as silk can be used alone or in combination. These mating fibers may be used as they are, or may be used as so-called processed yarns that have been subjected to a process such as crimping to change the shape and function.

Further, the polyurethane elastic yarn of the present invention may be used in a pair state, or may be used as a so-called elastically processed yarn state, which is covered with another fiber or twisted.

In particular, when the elasticized yarn is used, the draft of the polyurethane elastic yarn at the time of covering can be set to be large under the influence of the remarkably large elongation at break of the polyurethane elastic yarn of the present invention. It can be suppressed and is preferable in terms of cost.

1 way of warp and weft using polyurethane elastic yarn of the present invention
Weaving, 2-way woven fabric has few defects such as warp, weft, etc.
There is a feature that surface uniformity is excellent. this is,
This is probably because the polyurethane elastic yarn of the present invention has a small change in stress with respect to the stretching in the practical stretching region.

In sportswear such as ski pants, athletic wear, and leotards, polyurethane elastic yarns are often combined with mating yarns in the form of filaments such as nylon or elastic processed yarns covered with processed yarns.

The woven fabric thus obtained is processed by a conventional dyeing method.

That is, in the 1-way fabric and the 2-way fabric of the warp and weft, the greige fabric is relaxed with hot water, and then the dimensional stability is increased by the dry heat setting. Dyeing, and finally finished to a finished set.

The woven fabric of the present invention obtained as described above has heat resistance,
Hydrolysis resistance is as excellent as conventional polyether polyurethane elastic yarn, does not increase the cost and reduces productivity as using a special woven fabric. It achieves moderate body retention, good athletic performance when worn, and low clothing pressure at the same time. Outer sportswear such as ski pants, athletic wear, leotards; inner nighty wear, slacks pants, etc. It also provides useful performance in accessory fields such as casual wear.

Hereinafter, the present invention will be described specifically with reference to Examples, but these do not limit the scope of the present invention.

(Reference Example) Production method of polyurethane elastic yarn Production of polyalkylene ether diol: A container equipped with a stirrer and a reflux condenser was charged with 500 g of tetrahydrofuran and 68 g of neopentyl glycol. Three
Add 500 g of anhydrous phosphotungstic acid by heating at 40 ° C. for 3 hours, keep it at 60 ° C. under a dry nitrogen atmosphere and stir for 10 hours, then separate into two phases when left at room temperature . The upper layer was separated, and unreacted tetrahydrofuran and neopentyl glycol were removed by distillation to obtain 145 g of a transparent and viscous polyalkylene ether diol.

This diol has a number average molecular weight of 2,000 and a freezing point of -20 ° C.
It was found that (M _B ) / (M _A + M _B ) = 0.19.

Production of polyurethane elastic yarn Polyalkylene ether diol 2, obtained above,
000 g (1 mol) and 400 g (1.6 mol) of 4,4'-diphenylmethane diisocyanate (hereinafter abbreviated as MDI) were reacted with stirring under dry nitrogen at 80 ° C. for 3 hours to obtain a prepolymer. After cooling to room temperature, 4,457 g of dimethylacetamide was added and dissolved with stirring at room temperature to obtain a uniform prepolymer solution.

On the other hand, 34.2 g (0.57 mol) of ethylenediamine and 4.38 g (0.06 mol) of diethylamine were added to dimethylacetamide 1,2
The solution dissolved in 33 g was added at a stretch to the above prepolymer solution under high-speed stirring, and further reacted for 1 hour with stirring at room temperature to obtain a polyurethane polymer solution.

From this solution, a polyurethane elastic yarn was obtained by a usual dry spinning method.

(Example) A 20 denier polyurethane elastic yarn produced in the reference example was used as a core yarn, and a nylon 30 / 26BY processed yarn was drafted 3.0 times.
Using FTY covered at 1,400 T / M twist, 75 reeds /
A 2-way woven fabric was woven at a rate of 98 pieces / inch by putting 2 kg × 2 pieces.

This greige machine was processed through the process of greige set → scouring → intermediate set → dyeing → water repellency → finishing set.

(Comparative Example) Similarly, the polyurethane elastic yarn in the above-mentioned example was replaced with polytetramethylene glycol obtained in general and MD.
Polyether urethane elastic yarn 2 made from I
A 2-way woven fabric was obtained in exactly the same manner, except that 0d was used.

 The physical properties of these processed products are as shown in Table 1 below.

Here, when various performances are compared between the example and the comparative example,
The results are as shown in Table 2 below, and it can be seen that the embodiment is preferable for both the performances.

Here, the clothing pressure was determined by measuring the clothing pressure when the athletic wear was sewn with each 2-way fabric and the elbow was bent when worn.

(Effect of the Invention) The woven fabric obtained by using the specific polyurethane elastic yarn of the present invention can realize various physical property advantages that cannot be obtained by using the conventional polyurethane elastic yarn.

 That is, the elongation in both directions is large.

 The stress-strain curve in the practical region is flat.

 The ratio of the return power to the forward power is large.

 Good recoverability and small distortion at the time of stretch recovery.

The great feature that can be exhibited at the same time.

[Brief description of the drawings]

FIG. 1 shows a stress-strain curve (stress-strain curve; SS)
Curve). FIG. 2-1 shows a tester using the biaxial tensile test method, and FIG. 2-2 shows the data obtained thereby. FIG. 3 shows an SS curve of elongation recovery at practical elongation.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) D03D 15/08 D03D 15/00 D01F 6/70

Claims (1)

(57) [Claims] 1. A organic polyisocyanate compound, the following structural formula and (A), made of a structural unit represented by the structural formula (B), and the following _{equation: 0.08 ≦ (M B) /} (M A + M B) ≦ having a composition satisfying 0.85, polyalkylene ether diol having a molecular weight of 300 to 30,000, (wherein, M _X is X = a, in B, and the total number of structural units X present in the polyalkylene ether diol,
The structural units (A) and (B) may be present in the polyalkylene ether diol either randomly or in a block. _{) - (- CH 2 -)} 4 -O- ‥‥ (A) An active hydrogen-containing compound which reacts with an isocyanate group, comprising: a fabric having excellent wearing feeling obtained by using polyurethane elastic yarn.