JPH0816296B2 - Cold resistant stretch fabric - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cold stretchable fabric which is excellent in elastic recovery at low temperatures.

[Prior Art] Most stretchable fabrics used for skis and skate wear are woven fabrics, but warp knits are also used. Most of these fabrics are composed of polyamide (mainly nylon 6) multifilament yarn (mostly temporary processed yarn) and polyurethane elastic yarn. Polyamide (mainly nylon 6) is used because the dyeing temperature of nylon 6 is 100 ° C.
In the hot water temperature range, there is no deterioration of the polyurethane elastic yarn, but when using a polyester yarn that requires higher temperature and pressure dyeing, for example, conventional polyurethane elastic yarn deteriorates and good stretchability is obtained. The big reason is that they can't.

Further, polyurethane elastic yarns to date can be roughly classified into ether polyurethane elastic yarns and ester polyurethane elastic yarns.

Polyurethane elastic yarns generally have low elastic recovery at low temperatures. In this regard, regarding the ether-based polyurethane elastic yarn, Japanese Patent Laid-Open No. 63-219620 points out the phenomenon that the elastic recovery property decreases and the yarn breakage occurs frequently when the room temperature is lowered to about 5 ° C. in the winter cold season. is suggesting.

On the other hand, regarding ester-based polyurethane elastic yarns, up to now, there is no disclosure of elastic yarns having excellent elastic recovery at low temperatures.

[Problems to be Solved by the Invention] An object of the present invention is to use skis and skatewear in a peculiar place of use, that is, in a state where there is always a possibility of being wet by snow or ice, and in a low temperature state. It has excellent elasticity at low temperature suitable for use, does not stretch or slacken even when flexing and stretching, and there is virtually no penetration of water into the clothes and it can be worn comfortably. Another object of the present invention is to provide a cold-resistant stretchable fabric used for cold-resistant clothing.

[Means for Solving the Problem] The present invention provides a stretchable fabric composed of an elastic yarn and a thermoplastic multifilament yarn, wherein the stretchable fabric has the following formula (I-
1) and (I-2) are satisfied, instantaneous elastic recovery rate (%) ≧ 80 (I-1) (value at 0 ° C. at 50% elongation) Initial water repellency ≧ 90 points at no elongation (I- 2) (JIS L 1079 spray method) In addition, the polyurethane elastic fiber constituting the elastic yarn is made of polyurethane obtained by polymerizing a polymer diol, an organic diisocyanate and a chain extender, and the polymer diol has a molecular weight of 1000 to 3500. General formula Polyester diol or general formula which requires structural unit represented by A cold-stretch resistant fabric that is a polycarbonate diol that essentially has a structural unit represented by and that satisfies the following conditions (II) and (III).

6 ≦ total carbon number / (ester bond number or carbonate bond number) ≦ 11 (II) 0.015 ≦ methine group number / total carbon number ≦ 0.13 (III) (where total carbon number means ester bond in polymer diol) The total number of carbons other than the carbons contained in the carbonate bond) The elastic yarn used in the present invention is a filament yarn of polyurethane elastic fiber or a coated yarn (cover of the filament yarn covered with a thermoplastic multifilament yarn). Ring yarn, air entangled yarn, false twist entangled yarn, etc.).

Polyurethane constituting the polyurethane elastic fiber is obtained by polymerizing a polymer diol, an organic diisocyanate and a chain extender. The polymeric diol used in the present invention has a general formula of 1000 to 3500 in molecular weight. Polyester diol or general formula which requires structural unit represented by Is a polycarbonate diol in which the structural unit represented by
It is necessary to satisfy the formula (III).

6 ≦ total carbon number / (ester bond number or carbonate bond number) ≦ 11 (II) 0.015 ≦ methine group number / total carbon number ≦ 0.13 (III) (where total carbon number means ester bond in polymer diol) The total number of carbons other than the carbons contained in the carbonate bond) The molecular weight of the polymer diol used in the present invention is
The range of 1000-3500 is preferred. Particularly preferably 1500
~ 3000. When it is less than 1000, the elastic recovery property, heat resistance, hot water resistance and cold resistance become poor, and when it is more than 3500, the elastic recovery property, spinning stability and strength decrease. Examples of the compound giving an alkylene group having 1 to 10 carbon atoms and having one methyl branch include 3-methyl-1,5-pentanediol and 2-methyl-1,8-octanediol, which are used in combination with them. 1,6-hexanediol, 1,8-octanediol, 1,9-nonanediol, 1,6 as suitable diols that give other alkylene groups that can be used as
Examples thereof include 10-decanediol, but the invention is not limited thereto.

By using a diol having one methyl branch, both elastic recovery and heat resistance are improved. If a diol having two or more methyl branches or a long side chain such as an ethyl group, a propyl group or a butyl group is used, the overall performance such as heat resistance, elastic recovery and cold resistance becomes poor. When the carbon number of the diol is less than 5, elastic recovery, hot water resistance, heat resistance and the like are poor. If it is more than 10, elasticity recovery and transparency are deteriorated.

Examples of the compound that provides the organic group (R ² ) of the polymeric diol used in the present invention include dicarboxylic acids, and among them, aliphatic or aromatic dicarboxylic acids having 6 to 12 carbon atoms are preferable. Of these, aliphatic dicarboxylic acids are particularly preferable. Examples of the aliphatic dicarboxylic acid include adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid and the like. Further, as an example of the aromatic dicarboxylic acid, phthalic acid,
Examples thereof include terephthalic acid and isophthalic acid. Particularly, use of adipic acid, azelaic acid, and sebacic acid is preferred.

Furthermore, the polymer diol of the present invention is the above-mentioned (II),
It is necessary to satisfy the regulation represented by the formula (III). When the total carbon number / (ester bond number or carbonate bond number) in the formula (II) is less than 6, the hot water resistance and cold resistance are greatly reduced, and when it is more than 11, the elastic recovery property is greatly reduced. It is preferably 6-10. In the formula (III), when the number of methine groups / total carbon number is smaller than 0.015, elastic recovery property is extremely lowered, and when it is larger than 0.13, heat resistance and elastic recovery property are poor. A more preferred range is 0.03-0.10. The diol having one methyl branch in the side chain is preferably a primary diol from the viewpoint of heat resistance and elastic recovery.

The methine group referred to in the present invention is bonded to three different atoms (may be the same element) other than a hydrogen atom. Is.

The polyester diol used in the present invention may be obtained by any production method. For example, it can be produced by a method similar to a known method used in the production of polyethylene terephthalate or polybutylene terephthalate, that is, transesterification or direct esterification followed by a melt polycondensation reaction.

As the carbonate compound used in producing the polycarbonate diol used in the present invention, dialkyl carbonate, alkylene carbonate, or diaryl carbonate is preferably used.However, the method for producing the polycarbonate diol used in the present invention is particularly preferred. It is not limited. Above all, a polyurethane elastic yarn excellent in elastic recovery property even at a low temperature of −10 ° C. uses a diol containing 50% by weight or more of 3-meter-1,5-pentanediol as a diol component and uses it as a dicarboxylic acid component. Azelaic acid, sebacic acid, 1,10-
It is obtained from a polyurethane using a polyester diol obtained by using an aliphatic dicarboxylic acid having a methylene number of 7 to 10, such as decanedicarboxylic acid. When produced by the melt spinning method, azelaic acid and sebacic acid are particularly preferable in terms of overall performance.

The diols that can be used by copolymerizing with 3-methyl-1,5-pentanediol include 1,10-decanediol, 1,9-nonanediol, 1,8-octanediol, 1,
6-hexanediol, 1,5-pentanediol, 1,4-
Examples thereof include butanediol, but are not limited thereto.

The polyurethane constituting the polyurethane elastic fiber used in the present invention is obtained by polymerizing the polymer diol thus obtained, the organic diisocyanate and the chain extender.

Suitable organic diisocyanates used in the present invention include aliphatic, alicyclic or aromatic organic diisocyanates, specifically 4,4'-diphenylmethane diisocyanate, P-phenyl. Diisocyanates such as nylene diisocyanate, toluylene diisocyanate, 1,5-naphthylene diisocyanate, xylylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, 4,4'-dicyclohexylmethane diisocyanate Is exemplified. Preferably 4,4'-
It is diphenylmethane diisocyanate.

As the chain extender used in the present invention, a chain extender commonly used in the polyurethane industry, that is, a low molecular weight compound having a molecular weight of 400 or less containing at least two hydrogen atoms capable of reacting with isocyanate, for example, ethylene glycol, 1,1 4-butanediol, propylene glycol, 1,6-hexanediol, 3-methyl-1,5-pentanediol, 1,4-bis (2-hydroxyethoxy) benzene, 1,4-cyclohexanediol, bis (β- And diols such as (hydroxyethyl) terephthalate and xylene glycol. These compounds may be used alone or in combination of two or more. Most preferred chain extenders are butanediol or 1,4-bis (2-
Hydroxyethoxy) benzene.

Particularly when producing elastic fibers from thermoplastic polyurethane by the melt spinning method, 4,4′-diphenylmethane diisocyanate and a chain extender are added to organic diisocyanate used for the synthesis of thermoplastic polyurethane. Butanediol and / or 1,4-bis (2-hydroxyethoxy)
By selecting benzene, excellent performance in heat resistance, elastic recovery and elongation can be obtained.

As for the method for producing a polyurethane, a known technique of a urethane reaction can be employed. According to the study of the present inventors, it has been found that it is preferable to carry out melt polymerization substantially in the absence of an inert solvent, and particularly preferable to use continuous melt polymerization using a multi-screw extruder.

The ratio (B) / (A) of the organic diisocyanate (B) to the polymer diol (A) is 1.5 to 4.5 in a molar ratio of 1.5 to 4.5 in terms of overall performance such as elastic recovery, heat resistance, and cold resistance. I have.

Further, in the composition ratio of the polymer diol (A), the organic diisocyanate (B), and the chain extender (C), (B) /
The molar ratio of [(A) + (C)] is in the range of 0.9 to 1.2, especially 0.1.
The range from 95 to 1.15 is preferred. With this range, heat resistance,
A polyurethane elastic fiber having excellent elastic recovery and elongation can be obtained.

The molar ratio of (B) / [(A) + (C)] can be controlled during polyurethane polymerization or spinning. In the case of melt polymerization, the temperature is not particularly limited, but is preferably 200 ° C or higher and 260 ° C or lower.

The polyurethane constituting the polyurethane elastic fiber of the present invention is substantially a. A divalent group in which two hydrogen atoms are removed from hydroxyl groups at both ends of a polymer diol molecule; b. Derived from an organic diisocyanate General formula A group represented by the formula (R ³ represents a divalent organic group); c. A divalent form in which two hydrogen atoms capable of reacting with an isocyanate of a low-molecular compound (chain extender) molecule are removed. The group is considered to consist of the structural unit of.

Examples of the method for producing a polyurethane elastic fiber from the polyurethane thus obtained include a melt spinning method and a dry spinning method. In the case of the melt spinning method, the following conditions are essentially used for spinning. First, the spinning speed is important, at least below 900 m / min.
It is preferable to be 600 m / min or less. The spinning tension when the yarn is wound on the bobbin by the winder is 0.1 g / d or less, more preferably 0.05 g / d or less, and the difference in the feeding speed from the godet roller to the winder is 5%. It is necessary not to exceed, and it is preferable to approach constant velocity.

In addition, the wound thread is +20 to -50 ° C against the glass transition temperature (Tg) of the hard segment under low humidity.
It is preferable to perform heat treatment in the range of 3 to sufficiently carry out phase separation of hard and soft segments.

Next, regarding the thermoplastic multi-filament yarn used in the present invention, strict quality standards (length, width, property, wrinkle appearance, etc.) are required when shipping finished fabric even with stretchable fabrics. It is necessary that the intermediate heat set and the final heat set during dyeing and finishing be possible (thermoplasticity). That is, the intermediate heat set can suppress the occurrence of wrinkles during dyeing, and the final heat set can control the width and length. In order to ensure water repellency, multifilament yarn is better than spun yarn with fluff and high air content, and multifilament yarn, especially crimped yarn, is used to follow the expansion and contraction of polyurethane elastic yarn. Good to have.

Further, the polyurethane elastic yarn of the present invention used in the present invention can be dyed at a temperature of 120 ° C. or higher, and its elasticity is not impaired even when it is mixed with polyester fiber and dyed at high temperature and high pressure. Accordingly, the polyester multi-filament yarn can be used as a cold stretchable fabric.

The knitting and weaving is performed by a conventional method, but the polyurethane elastic yarn as the stretch member does not appear on the surface as a bare yarn. For example, it is needless to say that it is used as a back yarn or as a covered yarn covered with a thermoplastic multifilament yarn used as a front yarn, and it does not limit the structure, but it is a polyurethane elastic yarn in terms of elasticity. Is required to have a content of 5% by weight or more, and less than 5% by weight lacks tension.

The cold stretchable fabric of the present invention has a woven structure such as plain weave, twill, satin, and the like, and knitted structure includes half and satin.

The woven and knitted raw fabric is dyed by a dyeing method suitable for the thermoplastic multifilament used as the surface yarn. For example, if you use polyester multifilament yarn, 120 ℃
Dyeing is carried out in the above dyeing solution by a conventional method using a disperse dye. At this time, as described above, in order to avoid wrinkling during dyeing and excessive shrinkage, it is necessary to carry out heat set before dyeing (intermediate heat set), and the temperature is 150 ° C to 200 ° C, more preferably Is 170 to 190 ° C. If the temperature is lower than 150 ° C, the settability is poor, and if the temperature is higher than 200 ° C, hand hardening is observed.

Water repellency is obtained by water repellent processing. Regarding the water repellent treatment, the initial water repellency by JIS L 1079 spray method (when unstretched) is at least 90 points (those showing slight adhesion and wetting on the surface), preferably 100 points (of water adhesion and wetting on the surface). (Not available) is required. Usually, 80 points or more (those showing wetness in the form of water droplets) are regarded as water repellent treatment, but with stretchable fabric the water repellent effect is lower when stretched than when unstretched, and at 80 points sufficient water repellent effect Can't get

In the present invention, the water repellent agent and the processing method are not limited as long as the initial water repellent performance (at the time of non-stretching) is 90 points or more, but as a water repellent agent, a pyridinium salt type water repellent agent, methylol is commonly used. Amide type water repellents, ethylene urea type water repellents, silicone type water repellents, chrome chloride type water repellents, aluminum complex compound type water repellents, fluorine compound type water repellents and the like can be used. From the viewpoint of toxicity, handleability and performance, the silicon type and fluorine compound type are preferable. As the processing method, there are a treatment method in a bath and a post-processing method by DIP-NIP, but the DIP-NIP method is preferable because it is simple and easy to manage.

Generally, the effect of water repellent increases as the temperature of heat treatment after it adheres to the fabric becomes higher (usually 150 ° C or higher), and this point is excellent in heat resistance. The polyurethane elastic yarn used in the present invention is capable of final finishing set at 150 ° C or higher. Is. Further, polyester having a higher melting point is more advantageous than nylon-6.

Further, in the present invention, other post-processing such as combined use with an antistatic agent is possible as long as the above-mentioned initial water repellency is not impaired. Furthermore, for the purpose of obtaining heat retention, water pressure resistance, etc., it is possible to attach it to other materials such as napped products and films.

[Operation and Effect of the Present Invention] The cold stretchable fabric of the present invention comprises a thermoplastic multifilament yarn, a polyurethane elastic yarn excellent in hot water resistance, and a polyurethane elastic yarn excellent in elastic recovery even at a low temperature. And, at least the initial water repellency is 90 points or more, it fits smoothly in movements in the environment used for skiing and skating wear with snow and ice, and it is comfortable to wear with little water penetration into clothes. It is a stretchable fabric that can be used, and further has the effect that polyester multifilament can be used as the surface yarn.

These are extremely new material effects and can be expected as epoch-making materials.

An example will be described below. The measuring method adopted in the present invention is as follows.

<Measurement of Strong Elongation and Elastic Recovery of Elastic Yarn> The strong elongation and elastic recovery were determined according to JIS L-1013. However, the latter measured the elastic recovery rate at 200% elongation.

<Measurement of Elongation Instantaneous Elastic Recovery Rate of Finished Fabric> It was obtained by the following method according to JIS L-1013. Width 7 cm
× Instron (speed 1 cm /
Minute). Elongation is 3 kg, instantaneous elastic recovery is 50
% After stretching (holding for 2 minutes), return to the original state at the same speed, and calculate from the length where the stress becomes zero. Measurement temperature is 20 ℃, 0 ℃ and -10 ℃.

<Measurement of water repellency> Measured by JIS L-1079 Spool method. The compounds used are indicated by abbreviations, but the relationship between abbreviations and compounds is
It is as shown in Table 1.

Reference Example 1 (Production of Polyester Diol) Condensation water of 3-methyl-1.5-pentanediol (1534 g) and azelaic acid (1880 g) (MPD / AZ molar ratio of 1.3 / 1) was passed under nitrogen at a temperature of about 220 ° C. while passing nitrogen gas. Esterification was performed while distilling off. When the oxidation of the polyester became 0.3 or less, the degree of vacuum was gradually raised by the vacuum pump to complete the reaction. Thus, a polyester diol having a hydroxyl value of 56 and an oxidation of 0.23 (hereinafter referred to as polyester a) was obtained. The molecular weight of this polyester a was 1985.

REFERENCE EXAMPLES 2-16 Polyesters (polyesters bp) shown in Table 2 were obtained in the same manner as in Reference Example 1 except that the acid component and the diol component were respectively those shown in Table 2.

Reference Example 17 (Production of Polycarbonate Diol) 2-Methyl-1.8-octanediol (M
OD) and 1.9-nonanediol (ND) mixture (MOD / ND molar ratio: 50/50) 1730 g and diphenyl carbonate 214
A mixture consisting of 0 g was heated, and phenol was distilled off from the reaction system at 200 ° C. Gradually raise the temperature to 210-220 ° C, remove most of the phenol and evacuate, 6-10mmHg
The remaining phenol was completely distilled off at 210 DEG-220 DEG C. under a vacuum. As a result, a polycarbonate diol (polycarbonate a) having a hydroxyl value of 56 and a molecular weight of 2,000 was obtained.

Reference Examples 18 to 24 Polycarbonates (polycarbonates b to h) shown in Table 3 were obtained in the same manner as in Reference Example 17 except that the diol component and the carbonate compound shown in Table 3 were used.

Example 1 A mixture of polyester a and BD heated to 30 ° C. and MDI heated to 50 ° C. were melted with a metering pump in an amount such that the molar ratio of polyester / MDI / BD used was 1 / 3.15 / 2. Continuously charged in a twin-screw extruder that rotates in the direction,
Continuous melt polymerization was performed. At this time, the inside of the extruder was divided into three zones of a front portion, an intermediate portion and a rear portion, and the temperature (polymerization temperature) of the intermediate portion was set to 230 ° C. The resulting polyurethane (PU) was continuously extruded in the form of strands into water and then formed into pellets with a pelletizer.

This pellet was vacuum dried at 80 ° C for 10 hours, and the spinning temperature was 230 ° C and the spinning speed was 500m / min by a spinning machine equipped with a single screw extruder.
The spinning tension is about 0.05g / d, and the yarn feeding speed difference is about 3%
Was spun as an underfeed to obtain 40 denier / 2 filament polyurethane fiber. The fiber was heat-treated at 80 ° C. for 20 hours, and the physical properties were measured. As a result, preferable results were obtained as shown in Table-4. This yarn was wrapped with polyester calcination processed yarn 75d-36f (POY-Indore calcination yarn) to obtain a covering ring. The covering conditions were as follows.

Twisting machine: Teijin Seiki's single covering machine Draft ratio: 3.7 times Yarn speed: 20m / min Twisting number: 500 times / m Then, the covering ring is used as warp and polyester weft-processed yarn as weft 100d-36f (POY Indro temporary) Weaving was performed using the (fire yarn) to obtain a raw fabric. The conditions at this time were as follows.

 Warp draft: 2 times Texture: Twill On-machine density: 120 warp x 80 weft This greige was dyed and finished under the following conditions.

Scouring relax: 80 ° C x 1 minute (continuous relaxer) Preset: 180 ° C x 40 seconds (pin tenter) Dyeing dye: Resolin Blue FBL (Made by Bayer) 2.5% owf Auxiliary agent: Disper TL (Meisei Chemical Co., Ltd.) 1g / l bath Ratio: 1:30 Temperature condition: 40 ℃ up to 130 ℃ in 40 minutes, then 130
Hold at 30 ° C for 30 minutes.

・ Reduction cleaning ・ Water-repellent finish, finishing set Asahi Guard AG-710 (Fluorine-based ... Meisei Chemical Industry) Concentration 1.5% Pad 80% Pickup Dry 100 ℃ × 3 minutes Heat treatment 150 ℃ × 3 minutes Finishing density: 145 pieces / in × weft 125 pieces / in As a result, warp elongation is 60% and instantaneous elastic recovery rate (50% elongation)
The stretchable woven fabrics having the values of 97% (20 ° C), 97% (0 ° C) and 96% (-10 ° C) were obtained. The water repellency of the woven fabric was 100 points in the initial non-stretch water repellency.

When this woven fabric was cut and sewn into ski wear, it had excellent stretchability at low temperatures.

Examples 2 to 13 and Comparative Examples 1 to 12 Polyesters and polycarbonates having the compositions shown in Tables 2 and 3 were synthesized in the same manner as in Example 1, and polyurethanes having the compositions shown in Table 4 were synthesized and pelletized as they were without being pelletized. It is supplied and spun at a spinning temperature of 230 ° C and a spinning speed of 500 m / min.
A denier / 2 filament polyurethane elastic yarn was obtained.
The fiber was heat-treated at 80 ° C. for 20 hours to evaluate the physical properties. Further, weaving, dyeing and finishing were performed in the same manner as in Example 1, and the same evaluation as in Example 1 was performed. Examples 2 to 13 are good in the elongation and elastic recovery rate of the polyurethane elastic yarn, and the instantaneous elastic recovery rate at 50% elongation of the finished fabric at 20 ° C and 0 ° C. On the other hand, Comparative Examples 1 to 12 are inferior in overall performance because none of the elastic polyurethane yarn elongation, elastic recovery rate, and instantaneous elastic recovery rate of 50% elongation at 20 ° C. and 0 ° C. of the finished fabric are obtained. . Regarding Example 2, −
The instantaneous elastic recovery rate of the finished fabric at 50% elongation at 10 ° C is 96%, and it is surprising that the elastic recovery property does not almost decrease at -10 ° C as compared with room temperature (20 ° C) as in Example 1. It was an expected result. When the woven fabrics obtained in the examples were cut and sewn into ski wear, they were excellent in stretchability at low temperatures.

Examples 14 and 15 and Comparative Example 13 In the final water repellent / finishing process of Example 1, the concentration of the water repellent (Asahi Guard AG-710) was changed, and the initial water repellency without elongation was 80 and 90 points. Then, 100 stretch fabrics were obtained. Those that do not stretch these fabrics in the warp direction (0% stretch) and 30%
The wet feeling (by touch) of the back surface was examined with the stretched state.
The results were as follows.

When the initial water repellency was 90 or more, there was no feeling of wetting even at 30% elongation. When the woven fabrics obtained in Examples 14 and 15 were cut and sewn into skate wear, it was found to have excellent stretchability at a very low temperature.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Setsuo Yamashita 1621 Sakata, Kurashiki City, Okayama Prefecture Kuraray Co., Ltd. Examiner Yutaka Yamazaki (56) References JP 63-219620 (JP, A) JP 61 -222732 (JP, A) JP-A-54-23715 (JP, A)

Claims (1)

[Claims] Claims: 1. A cold stretchable fabric which comprises an elastic yarn composed of polyurethane elastic fibers and a thermoplastic multifilament yarn and which satisfies the following formulas (I-1) and (I-2), and has an instantaneous elastic recovery. Rate (%) ≧ 80 (I-1) (value at 0 ° C. at 50% elongation) Initial water repellency at no elongation ≧ 90 points (I-2) (JIS L 1079 spray method) The polyurethane is a polymer diol A polyurethane obtained by polymerizing an organic diisocyanate and a chain extender,
General formula with high molecular weight diol having a molecular weight of 1000-3500 (Wherein R ¹ is an alkylene group having 1 to 10 carbon atoms and having 6 to 10 carbon atoms, and R ² is an organic group), or a polyester diol which essentially has a structural unit represented by: (In the formula, R ¹ is an alkylene group having 1 to 10 carbon atoms and having 6 to 10 carbon atoms.) A polycarbonate diol which essentially has a structural unit represented by the following formulas (II) and (III): A cold stretchable fabric which is characterized by satisfying the conditions. 6 ≦ total number of carbons / (number of ester bonds or carbonate bonds) ≦ 11 (II) 0.015 ≦ number of methine groups / total number of carbons ≦ 0.13 (III) (wherein the total number of carbons means ester bonds and carbonates in the polymer diol) (The total number of carbons remaining excluding the carbons contained in the bond)