JPH0571075A - Misture permeable waterproof fabric having soft handle - Google Patents

Abstract

PURPOSE:To obtain fabric having both excellent moisture permeability and waterproofness by coating one side of superfine fabric having a specific handle with a polyurethane resin or polyamino acid urethane resin having <=a specific modulus. CONSTITUTION:One side of superfine fabric having <=10g total hand value by Handle-0-meter method is coated with a synthetic polymer consisting essentially of a polyurethane having <=8kg/cm<2> of 10% modulus or a synthetic polymer consisting essentially of a polyamino acid urethane resin to form a moisture permeable film of the resin, obtaining moisture permeable and waterproofing fabric having soft handle. The obtained fabric has >=1000mm H2O watertight pressure, >=7000g/m<2> 24hvs moisture permeability and <=20g total hand value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moisture-permeable waterproof cloth suitable for clothing, where the feeling and comfort are important, especially for sports applications.

[0002]

2. Description of the Related Art In recent years, along with the trend and popularization of golf and skiing, the related sports clothing has become more sophisticated, fashionable and cascading. For this reason, as golf wear and ski wear for rain, in addition to physiological comfort such as moisture permeability and waterproofness, there is a strong demand for athletic functional comfort such as comfort that does not interfere with exercise during wearing, It is desired to develop materials that have a soft texture.

Generally, a soft, breathable waterproof cloth having a feeling used in rain golf wear and ski wear is
It is a high density woven fabric that has been treated to be water repellent and is a so-called non-coated product. Although this non-coated product has sufficient moisture permeability, it has a water resistance of only about 500 mm water column (JIS L-1096 low water pressure resistance method) and is not sufficiently waterproof for practical use. Further, the non-coated product has a problem that the water repellency decreases with repeated washing and the waterproof property remarkably decreases. On the other hand, in conventional coating products, the coating resin itself has a high modulus, and since the resin enters the structure of the fabric during the coating process, the degree of freedom of the fabric structure is hindered, and the texture of the fabric tends to become hard.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a moisture-permeable waterproof cloth having excellent moisture permeability and waterproof property and having a soft texture. The purpose is to do.

[0005]

The present invention achieves the above-mentioned object and has the following configuration. That is, the present invention relates to a synthetic polymer or a polymer mainly composed of a polyurethane resin having a 10% module of 8 kg / cm ² or less on one side of a cloth mainly made of ultrafine fibers having a total hand value of 10 g or less according to the handle-o-meter method. Having a moisture permeable membrane composed of amino acid urethane resin-based synthetic polymer, water pressure resistance of 1000 mm water column or more, moisture permeability 7,000 g /
A moisture permeable waterproof fabric having a m ² · 24 hrs or more, and a summary of the moisture permeable waterproof fabric is that the total hand value of the moisture permeable waterproof fabric is 20 g or less. .. Hereinafter, the present invention will be described in detail.

The cloth made of ultrafine fibers used in the present invention means a cloth made of fibers finer than 1 denier, which is the single yarn fineness of general clothing fibers, and preferably a single yarn fineness of 0.5 denier or less. Composed of fibers. The number of filaments of fibers constituting the cloth may be any as long as it has a yarn strength of 240 g or more required for general clothing,
In addition, the yarn density is also the tensile strength required for general clothing 3
Any one may be used as long as it has 0 kg / inch.

The ultrafine fibers are a general method for producing ultrafine fibers, which is a direct spinning method (a method of making ultrafine fibers directly by drawing) or a sea-island division method (a large number of fibers are embedded in the sea of one fiber). Shaped multi-component fibers are immersed in a solvent to dissolve the sea component), split fiber type (a method in which multi-component fibers are spun so as to be stuck together, and then divided into ultrafine fibers by heat or solvent treatment) It may be manufactured by any of the methods,
The cross section of the ultrafine fibers may be circular or irregular.

The fabric made of the ultrafine fibers of the present invention is subjected to rope dyeing using a jet dyeing machine. It is difficult to obtain a fabric with a total hand value of 10 g or less by spreading dyeing using a known Zitger dyeing machine or a beam dyeing machine, so it is better to avoid it.

After dyeing, the cloth made of ultrafine fibers is subjected to a water repellent treatment. The water repellent used here may be a known paraffin water repellent, a polysiloxane water repellent, a fluorine water repellent or the like. A fluorine-based water repellent is preferably used. A water repellent is applied by a padding method, a spray method, a coating method, etc., and water repellent treatment is performed by drying and heat treatment.

After the water repellent treatment, calendering is performed prior to coating. The calendering is preferably carried out at a temperature of 170 ° C. or higher and a roll pressure of 40 kg / cm ² or higher. Calendering condition is 170 ℃, 4
If it is less than 0 kg / cm ² , resin penetration is likely to occur during the coating process and the target total hand value is 20.
A moisture-permeable waterproof fabric having a weight of g or less cannot be obtained.

Subsequent to the calendar processing, a resin solution of a synthetic polymer mainly composed of polyurethane resin or a synthetic polymer mainly composed of polyamino acid urethane resin is used to form a moisture-permeable waterproof film on one surface of a cloth made of ultrafine fibers.

The synthetic polymer mainly composed of polyurethane resin used in the present invention includes polyurethane as the synthetic polymer.
It means a synthetic polymer containing 0 to 100%, and other synthetic polymers include, for example, polyacrylic acid, polyvinyl chloride,
Polymers such as polystyrene, polybutadiene, and polyamino acids may be contained in the range of less than 50%, and the form may be a copolymer or a blend.

The polyamino acid urethane resin-based synthetic polymer (hereinafter referred to as PAU resin) used in the present invention is a copolymer of amino acid and polyurethane, and has a degree of affinity for water. 50 to 1 of the synthetic polymer in which the amino acid component, the polyurethane component or both the amino acid component and the polyurethane component are hydrophilized
It means a copolymer containing 100%, and other synthetic polymers such as polyurethane, polyacrylic acid, polyvinyl chloride, polystyrene, polybutadiene, and polyamino acid may be contained in a range of less than 50%. Often,
The form may be a copolymer or a blend.

The constituent amino acids include D, L-alanine, L-aspartic acid, L-cystine, L-glutamic acid, glycine, L-lysine, L-methionine and L.
-Leucine and derivatives thereof are mentioned, and when synthesizing a polyamino acid, an amino acid N-carboxylic acid anhydride (hereinafter, N-carboxylic acid anhydride is referred to as NCA) obtained from an amino acid and phosgene is generally used. Especially, from the viewpoint of film performance, optically active γ-alkyl-glutamate-NCA is preferably used, and among them, γ-methyl-L-glutamate-NC is preferred from the viewpoint of price and film physical properties.
A or γ-methyl-D-glutamate-NCA is PA
Often, it is advantageously selected as the amino acid component of the U resin.

Polyurethane is a polymer obtained by reacting polyisocyanate and polyol,
As the polyisocyanate, known aliphatic and aromatic polyisocyanates can be used, and examples thereof include hexamethylene diisocyanate, toluene diisocyanate, xylene diisocyanate, and reaction products of these excesses with polyhydric alcohols. As the polyol, it is possible to use publicly known ones such as polyether or polyester which are used in the usual production of polyurethane resin. Examples of the polyester include a reaction product of a polyhydric alcohol such as ethylene glycol, diethylene glycol or 1,4-butanediol and a polybasic carboxylic acid such as adipic acid, oxalic acid or sebacic acid. Examples of the polyether include those obtained by adding one or more alkylene oxides such as ethylene oxide, propylene oxide and butylene oxide to a polyhydric alcohol such as ethylene glycol and propylene glycol.

The moisture-permeable waterproof fabric of the present invention is manufactured by various methods. If high moisture permeability is desired, a wet film formation method by direct coating may be used, and if productivity is considered, a dry film formation method by direct coating may be used.

First, in the wet film forming method, a resin solution is diluted and mixed with a polar organic solvent (a surfactant is also used if necessary), and the resin solution is applied to the surface of the cloth or the surface of the release cloth, and then the water is applied in water. A water-permeable and waterproof membrane is obtained by immersing in a resin to solidify the resin component. In this case, the porosity of the moisture-permeable waterproof membrane is controlled by the dilution ratio of the polar organic solvent (resin solid concentration), the addition of a surfactant, the temperature of water as a coagulating liquid, and the like. Examples of the polar organic solvent used here include dimethylformamide, dimethylacetamide, dimethylsulfoxide, N-methylpyrrolidone, and hexamethylenephosphonamide.

There are various methods for forming the moisture-permeable and waterproof film by the dry film forming method, and a typical method is as follows.
After mixing the emulsion type resin, the volatile solvent and water and emulsifying it uniformly, apply the resin solution on the surface of the fabric, and first,
A microporous moisture-permeable waterproof membrane that evaporates the volatile solvent under the temperature conditions where only the volatile solvent evaporates and does not evaporate the water, and then evaporates the water under the temperature condition that the water evaporates To get In this case, the porosity of the microporous resin film is
It is optionally controlled by the amounts of volatile solvent and water added to the resin. Volatile solvents used here include ketone solvents and aromatic hydrocarbon solvents. As ketone solvents, acetone, methyl ethyl ketone, methyl isobutyl ketone, etc., and aromatic hydrocarbon solvents are used. Examples thereof include toluene and xylene.

In the present invention, an isocyanate compound is used in combination with the resin solution of the direct coating method for the purpose of improving the peeling resistance between the moisture-permeable waterproof membrane and the cloth. As the isocyanate compound, 2,4-tolylene diisocyanate, diphenylmethane diisocyanate, hexamethylene isocyanate or the like is used.

In the present invention, a water repellent treatment may be performed as a post process. The water repellent used here may be a known one such as a paraffin water repellent, a polysiloxane water repellent, a fluorine water repellent, and a water repellent treatment is appropriately performed by a padding method, a spray method, a coating method, or the like. I'll do it. The present invention has the above configuration.

[0021]

[Working] Ordinary moisture permeable membrane is 15% for 10% module.
Because of the high elastic modulus of / cm ² or more, the texture of the moisture-permeable waterproof fabric using the moisture-permeable membrane was the dry and hard texture peculiar to the coating fabric. On the other hand, the moisture permeable waterproof fabric of the present invention has a moisture permeability of 10% module 8 kg / cm.
^Since a moisture-permeable membrane of ² or less is used, the moisture-permeable membrane itself is soft, and a soft fabric mainly composed of ultrafine fibers with a single yarn fineness of 1 denier or less is used as a fabric, and even in the dyeing process of this fabric, When dyeing with a jet dyeing machine, the fabric is rubbed at the time of dyeing and the texture of the fabric is softened.
Furthermore, by setting the crushing calendering condition of the cloth to a high pressure during calendering, it is possible to prevent the coating resin from penetrating into the structure of the cloth during coating and prevent hardening of the texture. Become.

Thus, the moisture-permeable waterproof fabric of the present invention is
At the time of its production, the fabric has a soft texture similar to that of the conventional base fabric because the moisture permeable membrane, the fabric, and the processing steps are designed to be flexible.

[0023]

EXAMPLES The present invention will be described below with reference to examples. The performance of the fabrics in the examples was measured by the following method. (1) Handle Handle-O-Meter method (JIS L-109
6) Handling method By handling, the following four grades were relatively evaluated. ◎: Very soft ○: Soft △: Slightly hard ×: Hard (2) Water resistance (water pressure resistance) JIS L-1096 (low water pressure resistance method) (3) Moisture permeability (moisture permeability) JIS L-1099 (A-1) Method) (4) A 10% modular coating resin solution was applied to the surface of the release paper with a knife over roll coater to form a film, the resin film was peeled from the release paper, and the resin film was cut into 10 × 100 mm ² The stress-strain curve is measured according to JIS L-109 in a tensile test.
It measured according to 6.

Example 1 First, the PAU resin used in this example was produced by the following method. Polytetramethylene glycol (OH number: 56.9), 1970 g, and 1,6-hexamethylene diisocyanate, 504 g, were reacted at 90 ° C. for 5 hours to give a urethane prepolymer having an isocyanate group at the end (NC
O equivalent weight 2340) was obtained. This urethane prepolymer 8
5 g and γ-methyl-L-glutamate-NCA 85 g were added to dimethylformamide / dioxane (weight ratio = 7/3).
Dissolved in 666 g of the mixed solvent of 50% and added with 50 g of a 2% triethylamine solution while stirring, and reacted at 30 ° C. for 5 hours, a yellowish brown emulsion with good fluidity of 32,000 cps (25 ° C.) A solution (hereinafter referred to as PAU resin X) was obtained. Take 836g of this PAU resin X,
Toluene / methyl ethyl ketone (weight ratio = 5 /
524 g of the mixed solvent of 5) was added, 34 g of 3-amino-1-propanol was added with stirring, and the reaction was carried out at 30 ° C. for 8 hours. A resin solution (hereinafter referred to as PAU resin Y) was obtained.

Next, both the warp and weft nylon fibers 70d
/ Warp density using 136f 120 threads / inch, weft density 80
A book / inchi plain woven fabric (taffeta) was prepared, and after scouring, drying and presetting in the usual manner, it was dyed with an acid dye in a Circular dyeing machine. Next, after performing water repellent treatment with 100% pick-up and heat treatment at 150 ° C x 2 minutes with a 5% aqueous solution of Asahi Guard 710 (product of Asahi Glass Co., Ltd.) of the fluorine-based water repellent Emulsion, a calendar with a mirror surface roll 170 ° C, 50kg / cm ² using a processing machine
Calendering was performed under the conditions described above to obtain a cloth made of the ultrafine fibers used in the present invention. The total hand value was 6 g.

A resin (10% module 6 kg / cm ² ) of the following formulation 1 was coated on the surface of the cloth made of the ultrafine fibers at a coating amount of 60 g / m ² , dried, and water-repellent treatment (the water-repellent treatment described above). The same conditions as above) and finishing setting were carried out to obtain a moisture-permeable waterproof fabric of the present invention having a coating layer of 10 g / m ² . [Formulation 1] PAU resin Y 100 parts by weight Resamine X-100 1 part by weight (Dainichi Seika Chemicals Ltd., isocyanate compound) Water 30 parts by weight

For comparison with the present invention, a plain weave (total hand value of 15 g) having a warp density of 120 threads / inch and a weft density of 90 threads / inch using nylon fibers 70d / 24f for both warp and weft is used in this embodiment. Other than that, a moisture-permeable waterproof cloth for comparison (Comparative Example 1)
And ) Got.

Further, a moisture-permeable waterproof cloth for comparison (referred to as Comparative Example 2) was obtained in the same manner as in this Example except that the following Formulation 2 was used in place of Formulation 1 in this Example. [Formulation 2] Heimlen X-3038 100 parts by weight (Dainichi Seika Kogyo KK, polyurethane resin) Resamine X 1 part by weight (Dainichi Seika KK, isocyanate compound) Water 30 parts by weight

The performances of the present invention and the moisture-permeable waterproof fabric for comparison obtained as described above were measured, and the results are also shown in Table 1.

[Table 1]

As is apparent from Table 1, the moisture-permeable waterproof fabric of the present invention has a softer texture than the ordinary moisture-permeable waterproof fabric and has both excellent moisture permeability and waterproof performance.

[0031]

The breathable waterproof fabric of the present invention is
A 10% module is 8 kg / cm ^{2 on} one side of an ultrafine fiber fabric with a total hand value of 10 g or less measured by the O-meter method.
Since it has a moisture permeable membrane of the following polyurethane resin or polyamino acid urethane resin, it has both extremely soft texture and excellent moisture permeability and waterproofness. The moisture-permeable waterproof fabric of the present invention is a material particularly suitable for rain golf wear, ski wear and the like.

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Claims (1)

[Claims] 1. A polyurethane resin-based synthetic polymer or polyamino acid having a 10% module of 8 kg / cm ² or less on one side of a cloth mainly composed of ultrafine fibers having a total hand value of 10 g or less measured by a handle-o-meter method. Having a moisture permeable membrane made of synthetic polymer mainly composed of urethane resin, water pressure resistance of 1000 mm or more water column, moisture permeability of 7,000 g /
A m ² · 24hrs or more moisture-permeable waterproof fabric, moisture-permeable waterproof fabric having a flexible feeling of total hand value of the transparent moisture waterproof fabric is equal to or less than 20g.