JPS5976246A - Extensible moisture permeable waterproof cloth - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stretchable moisture-permeable waterproof fabric, and more particularly to a stretchable moisture-permeable waterproof fabric that has a polyurethane microporous membrane and has moisture-permeable waterproof properties and excellent elasticity. Regarding moisture-proof fabric.

Recently, moisture-permeable waterproof fabrics have emerged that are improved from conventional waterproof fabrics.

Regarding these, a representative example is JP-A-55-8
0583. 56-26076, 57-18237.
One example is the Japanese Patent Publication No. 51-18991.

All of these fabrics have a moisture-permeable waterproof membrane, and although there are differences in material and structure, these membranes have a microporous structure that essentially does not allow water to pass through, but allows water vapor to pass through.

However, the moisture-permeable waterproof fabric has the disadvantage that the moisture-permeable waterproof membrane itself has no stretchability, and the fabric does not have sufficient stretchability due to the method of twisting or coating.

Moisture-permeable and waterproof fabrics are in high demand primarily for sports clothing, and therefore often require both moisture-permeable and waterproof properties as well as stretch properties.

SUMMARY OF THE INVENTION Therefore, the present invention aims to improve such drawbacks and provide an excellent stretchable moisture-permeable waterproof fabric that is moisture-permeable, waterproof, and stretchable.

That is, the first invention has a stretchable base fabric on at least one side of a microporous membrane mainly made of polyurethane, has a stretching ratio of at least 2 parts in the vertical and horizontal directions, and has a stretchable base fabric of at least 2 parts or more according to the Bundesmann test. A stretchable, moisture-permeable, waterproof fabric that exhibits no water leakage after 2 hours and has a water leakage resistance index of 50 or more when stretched by 20% in both length and width.

Further, the second invention has a stretchable base fabric on at least one surface of the microporous membrane mainly composed of polyurethane,
A stretchable moisture-permeable waterproof material having an elongation rate in the vertical and horizontal directions of at least 20%, a water pressure resistance of 1500 mm or more, and a water pressure resistance of 1000 mm or more when stretched by 20% in the vertical and horizontal directions. Exists in fabric.

The base fabric that is the base of the stretchable, breathable, waterproof fabric according to the present invention may be of any type as long as it itself has stretch properties, and all of the structures of the five knitted fabrics may be used. Can be used. Currently, it is possible to easily obtain a base fabric having desired stretchability in both the vertical and horizontal directions.

The microporous membrane of the present invention has a microporous layer composed of a synthetic polymer mainly composed of polyurethane, and this layer has a large number of fine pores penetrating from the front surface to the back surface. There is a relatively thick cavity that communicates with this small hole, and at least one part of the wall that partitions the adjacent cavities is
It has a structural characteristic in that it has a communicating hole in the cavity, and a water repellent agent is also attached to the wall surface of the original cavity. Here, the surface pores typically have an average diameter of less than 5 microns, such as less than 1 micron, and the internal cavities typically have a diameter of at least three times the pore diameter.

Such microporous membranes desirably have an elongation ratio of 100 or more in length and width, preferably 150 or more. This is because when the microporous membrane is attached to the base fabric, even if the overall stretchability is low, the microporous polyurethane membrane is partially stretched to a large extent.

Next, as for stretch as a product, if we take into account the amount of slack in the garment itself and summarize the required elongation rate for each purpose,
It will be roughly as follows.

Fabric for Japanese golf and fishing with a vertical and horizontal elongation rate of 40% Skiing and mountain climbing fabric Fabric for gymnastics with 60-80%
The reason why the required elongation rate for gymnastic fabrics of 150 to 250 cm is extremely high is that this type of clothing originally does not allow for any looseness at all and is tightly fitted to the body.

As is clear from these, the comfort level is 5 for sports use.
In order to obtain functionality, it must extend in at least two directions, and the sum of the two directions must be at least 40%, that is, vertically,
It is necessary that the elongation rate in the lateral direction is at least 20% or more.

Preferably, it extends almost uniformly in the vertical and horizontal directions.

Although the elongation rate of the stretchable moisture-permeable waterproof fabric of the present invention depends on the performance of the base fabric, the elongation recovery rate is extremely excellent and is usually 90 coefficients or more. If it is 9 or above, there is no problem with sewn products losing their shape after wearing, but preferably 9
An elongation recovery rate of 5% or more is optimal.

Here, the elongation rate and elongation recovery rate are 1 for a fabric with a width of 5 cTL.
．． When the length when a load of 8 kg is applied is A, the original length is B, and the length after removing the load of A is C, -C x 100 = value specified by elongation recovery rate It is.

Regarding moisture permeability, strong fabrics that are not waterproofed, such as tanks, usually have a rating of 9000 fi.
'/, 2, usually 100-500'/77122 with non-moisture permeable materials such as rubberized coatings.
It has a performance of 4 hr.

In the present invention, since the polyurethane microporous membrane is adhered to the base fabric, it is essentially 9000'4' 24.
It cannot exceed hr.

Regarding the relationship between the amount of exercise and the amount of water vapor generated by the body,
Conventionally, there are few authoritative documents, but generally speaking, when the outside temperature is
Approximately 1000'/m2.24 h r at oC, 10
1300-1500'4' at °C, 24 hr,
1800-2000'/m' at 20°C, 24
hr.

At 30°C, water is generated at a rate of approximately 5000 f/', 24 hr.

Even stronger exercise (exercise load 300 K% 2.hr) f
is about 2000'/m2.24 hr at 0°C,
It is said that water is generated at 3000 f/2.24 hr at 21°C.

Complete moisture permeability at high temperatures is impossible, but in order to average moisture dissipation from the body at normal outside temperatures, normally at least 3000 Gua7)1', 24 hr, preferably 5000ξ2,24 hr is required. It is.

The fabric having a polyurethane microporous membrane produced by the method described below has a polyurethane microporous membrane of approximately 2500 to 5500iii'/2.
．． Although it has a moisture permeability of 24 hours, it is the 30007 that has been confirmed to be clearly comfortable in practical tests.
It was 42.24 hr.

Here, the moisture permeability refers to a value measured according to JIS Z-0208.

Furthermore, in addition to the stretchability and moisture permeability described above, waterproofness is essential in the present invention.

The waterproof performance of breathable waterproof fabrics during rain is evaluated using Puntes Mantes (DIN) modeled after actual rain wearing conditions.
53888) is in good agreement with the actual situation.

Moisture-permeable waterproof fabrics using microporous membranes cannot guarantee that they will never leak water even in the rain.

The micropores created to provide moisture permeability allow moisture to enter when the fabric is violently pounded, and when the fabric is kneaded, moisture is absorbed into the micropores.

Therefore, it is necessary to control the microporosity of the film so as not to cause practical problems.

That is, the Bundesmann test (rainfall amount 550”!/h
r), the fact that water does not leak even after about 2 hours means that water does not leak even after being worn for 10 hours in actual heavy rain (100 mIVhr).

One exercise in the rain does not last more than 10 hours, so in order to make the wearer comfortable while exercising in the rain, it is necessary that the Bundesmantes does not leak water for at least 1 to 2 hours. .

The fabric of the present invention has elasticity as described above, and when it is stretched, the size of the pores naturally increases due to the stretching of the microporous film, making it more likely to cause water leakage. Therefore, it is necessary to prevent water leakage even when stretched, that is, when stretched by 20% both vertically and horizontally.

Next, the fabric of the present invention has a water leakage resistance index of 50 or more, preferably 80 or more when stretched by 20% in both length and width.

To measure the water leakage resistance index, first draw a circle with a diameter of 10C1n on the back of the fabric that will be subjected to the artificial rain test, and place a square of 7><7cm inside it.
Divide into Tn squares to form 49 squares. Next, after the artificial rain test, the surface leakage resistance value inside each of the above-mentioned drainage holes was measured.

To measure the surface leakage resistance value, for example, use a multi-tester MODEL A-303TRD (manufactured by Sanwa Keiki Seisakusho), fix the distance between its detection parts to 5 mm, and touch any part of each square to measure the resistance. It can be found by measuring . In the present invention, a resistance value of 5×10''15 ram is used as a reference value to indicate a state in which there is no water leakage, and a portion exceeding this value is determined to be free of water leakage.

The water leakage resistance value was measured at 49 locations using the above method, and the result was 5×106
Calculate the number n of the first squares indicating Ω15 mm or more.

Based on this n, the water leakage resistance index is calculated from the following formula.

Water leakage resistance index knee x 100 9 Finally, the water pressure resistance of the fabric of the present invention will be described.

Although the Bundesmann test closely matches reality, it is not a common test method.

In Japan, water pressure resistance (
JIS L-1079) is used. Since this is a static water pressure test, the symmetry with the Pundesman test is not clear, but as a result of various studies, we found that
It has been found that there is no practical problem if the water pressure resistance when elongated by 500 mm or more and 20% in both length and width is 1000 mm or more.

The stretchable, moisture-permeable, waterproof fabric of the present invention described above is obtained as a synergistic effect of the combination of a specially prepared coating liquid and processing of a base fabric having stretchability.

An example of the method for manufacturing a fabric according to the present invention will be explained below for each manufacturing process.

First step. A base material having appropriate mold release properties and good dimensional stability is prepared.

Second process. A polar organic solvent solution containing mainly a polyurethane polymer is applied as a coating liquid onto the substrate.

Third step. A microporous polyurethane membrane is formed by immersion in a coagulation bath.

Fourth step. The base fabric having stretchability and the polyurethane microporous membrane are laminated together.

Fifth step. Apply water repellent treatment.

6th step. The base material having mold releasability is peeled off from the microporous polyurethane membrane.

7th step. If necessary, a stretchable fabric is laminated to the microporous polyurethane membrane.

That is, in manufacturing the fabric of the present invention, a polar organic solvent solution mainly containing the polyurethane polymer shown in the second step is directly applied to one side of the base fabric having stretchability, and then a coagulation treatment is performed. A finely porous polyurethane film may be formed, but the stretchability of the base fabric makes it difficult to obtain a uniform product. An advantageous method is to form a microporous polyurethane membrane on a base material with good dimensional stability, and then transfer the microporous membrane onto a stretchable base fabric using an adhesive.

Here, as a base material with mold releasability, polyurethane has good dimensional stability during processing in the so-called wet coagulation method, but it is also necessary to use polyurethane under tension and other conditions from the third step to the fifth step. A material that does not peel off from the porous membrane and can be easily peeled off in the sixth step is desirable.

Such a releasable base material is a high-density polyester fabric, for example, 75 denier length, 24 filaments, 99 filaments/inch,
Width 75 denier, 36 filament.

84 pieces per inch were immersed in a 0.2% water solution of a fluorine-based water repellent, squeezed to a squeezing rate of 60 inches, dried at 100°C, and
It can be easily obtained by heat treatment at 40° C. for 5 minutes and then calendering at 190° C. under high pressure.

Note that if the amount of fluorine-based water repellent deposited is large or if the calender treatment is strong, there is a problem that the microporous polyurethane membrane is likely to peel off from the third step to the fifth step.

In the fabric of the present invention, as described above, a polar organic solvent solution containing a polyurethane polymer as a main component is applied as a coating liquid to a base material which has been given an appropriate release property in advance.

As the polyurethane, polyester-based polyurethane distomer, polyether-based polyurethane distomer, etc. can be used arbitrarily, but in order to obtain good elongation properties and elongation recovery properties, the tensile strength should be 400, $7 or more, and the elongation at break should be 50.
A coefficient of 0 or higher is preferable. These concentrations are usually 8-2
5% by weight is preferred. Essentially, any polar organic solvent may be used as long as it can dissolve polyurethane, and commonly known polar organic solvents such as dimethylformamide, dimethylsulfoxide, and tetrahydrofuran are used, but dimethylformamide is economically most advantageous. .

In the present invention, it is desirable to add a water repellent and a pore regulating agent to the polyurethane solution in a 4-g organic bath medium in order to impart durable waterproofness and excellent moisture permeability.

As such a water repellent, a fluorine-based water repellent, a silicone-based water repellent, etc. can be used. In particular, a fluorine-based water repellent can be used not only on the narrow surface of a microporous polyurethane membrane produced by a wet coagulation method, but also on the narrow surface of the polyurethane microporous membrane produced by a wet coagulation method. Durable water repellency can be imparted to the surface of the numerous micropores inherent in the material.

The content of the water repellent in the coating liquid is 0.1 to 2.
．． 0% by weight is desirable; if it is less than 0.1% by weight, sufficient water repellency will not be obtained, while if it exceeds 2.0% by weight, the size of the pores inherent in the microporous membrane produced during wet coagulation may become uneven. There is a tendency for moisture permeability to decrease.

Polyiso/anate is added to the coating liquid.

As the polyiso/anate, an organic compound having two or more isonoanate groups such as diincyanate and triiso7tunate is used. Specifically, for example, 2.4-
Diisocyanates such as (2,6-)tolylene diinocyanate, diphenylmethane 4,4'-diincyanate, 1,4-naphthalene diiso7anate, inophorone diiso7anate, hexamethylene diinocyanate, and these diiso/anates 3 It can be arbitrarily selected and used from triisocyanates obtained by an addition reaction between 1 mole and a compound having 3 moles of active hydrogen, such as trimethylerpropane or glycerin. Note that these polyisocyanates may be in a form in which the incyanate group is free or in a form stabilized by adding phenol or the like. When adding polyisocyanate to the coating liquid, the amount added is 0.
．． 2 to 3% by weight is preferred. Such a polyisocyanate contributes to improving the adhesion between the water repellent and the microporous polyurethane membrane.

As the pore regulator, ordinary wet coagulation, surfactants used in the same method, water-soluble inorganic salts, water-insoluble inorganic salts, and other povals can be used, but in the present invention, sulfosuccinic acid alkyl ester type anions are used. Surfactants give favorable results.

That is, by adding 1 to 8% by weight of such a surfactant, it exhibits an excellent pore adjustment effect, makes the pores inherent in the microporous membrane produced by wet coagulation uniform and fine, and provides excellent moisture permeability. can do.

If the content of the surfactant is less than 1% by weight, its effect will be insufficient, while if it exceeds 8% by weight, the pore size inside the resulting microporous membrane will tend to become coarse.

The polar organic solvent solution mainly containing the polyurethane polymer prepared above is coated uniformly to a desired thickness using a knife-over-roll coater or other conventional coating machine.

The third step is not particularly limited, but it is advantageous to use an aqueous solution containing 5 to 15% of dimethylformamide E as the coagulation bath.

The microporous polyurethane membrane obtained as described above is then bonded to a stretchable base fabric using an adhesive. Although various adhesives can be used as the adhesive, it is preferable to use a so-called two-molded polyurethane liquid adhesive.

In addition, in the present invention, it is necessary to maintain the excellent moisture permeability of the polyurethane microporous membrane as much as possible9 and to firmly adhere it to the stretchable base fabric, so the adhesive is applied in the form of dots or diagonal lines. It is desirable to apply it intermittently.

As such a coating method, it is advantageous to use a gravure roll coater which is engraved in the form of dots or diagonal lines.

Note that a normal laminating machine can be used for bonding.

The base fabric having stretch properties bonded to the polyurethane microporous membrane obtained above is subsequently subjected to water repellent treatment (fifth step).

Fluorine-based water repellent, 7 Ricoh? Any water repellent can be used, such as a water repellent.

The amount of water repellent applied to the base fabric can be any amount depending on the application, but it is 0.5 to 2. The Oi amount is generally within a range of 1 to 3.

The sixth step is to peel off the base material having mold releasability from the microporous polyurethane membrane, and a normal peeling machine can be used for one cycle.

A stretchable moisture-permeable waterproof fabric is obtained through the above steps, but if necessary, a stretchable base fabric can be further bonded to the polyurethane microporous membrane surface of this fabric. In this case, any type of adhesive can be used as the adhesive, but it is preferable to apply the adhesive intermittently so as not to impede moisture permeability.

As is clear from the manufacturing method, the stretchable moisture-permeable waterproof fabric of the present invention has excellent moisture permeability and durable waterproofness without impairing the stretchability and texture of the base fabric used. It can be applied to a wide range of applications, including golf wear, ski wear, sportswear, winter clothing, rain clothing, and work clothing.

Examples of the present invention will be described below.

Example 1 Polyester polyurethane F / () Mer (10
0% Moshu7, t, 65KLi/7712. 9/cut to tensile strength 500.

elongation at break 550%), 1 part by weight of a fluorine-based water repellent, 1 part by weight of trimethylolpropane-tolylene isocyanate (molar ratio 1:3) adduct, and anionic surfactant (sulfosuccinic acid alkyl ester soda). salt) 2
Part by weight was dissolved in 6 parts by weight of dimethylformamide to prepare a coating liquid.

The viscosity of this coating liquid is 5000 C1) S/30
'C.

Polyester fabric (vertical 75 tenier 24 filament 9
9 filaments/inch, width 75 tenier 36 filaments 84 filaments/inch) were immersed in a 0.2% aqueous solution of fluorine-based water repellent, squeezed to a squeezing rate of 60%, dried at 100°C, and dried at 140°C.
Heat treatment was performed at °C for 5 minutes.

This water-repellent fabric was treated with Calendar Row/L.
Calendaring with pressure at 90°C,
A smooth surface with appropriate mold release properties was obtained.

Approximately 2507/rIL2 of the coating liquid was applied to the obtained smooth surface using a knife over roll coater,
Next, it was immersed in an aqueous solution containing 10% by weight of dimethylformamide and gelled at 30'C for 5 minutes.
After washing with hot water at 0°C for 30 minutes, drying with hot air, heat treatment was performed at 160°C for 30 seconds.

In this way, a highly stretchable polyurethane film having a microporous structure was formed.

Polyester-based polyurethane elastomer (active ingredient: 70%)
) Adhesive liquid (viscosity 3500 CI) S/3
0 'C) was applied in dots at approximately 35 f/2 using a gravure roll coater engraved in a grid pattern of 30 meshes.
It was dried with hot air at 100°C.

A nylon two-way stretch fabric (using nylon 70D2 elastic yarn 4013) with elastic fibers having a stretch of 50% vertically and 50% horizontally is pasted on this adhesive-coated surface in a non-tensioned state, and then lightly twisted with a mangle. , heated to 100°C,
Further aging was performed at 40°C for 24 hours.

Subsequently, approximately 80 g/rrL2 of a trichloride solution containing 2 parts by weight of a fluorine-based water repellent was applied to the surface of the stretch fabric.
Heat treatment was performed at °C for 5 minutes.

After the above treatment, the polyurethane microporous membrane and the releasable offal were peeled off.

The resulting product has a microporous polyurethane membrane and a stretchable base fabric bonded together via a dotted adhesive layer, so it has an extremely soft texture, and the base fabric has almost no stretch and stiffness. No damage, water pressure resistance 2000 w'm H20 weight m
2. Buntesman rain test 5 somm x 2 hours, no leakage, moisture permeability 4100 for 2.24 hours, peel strength 5
50g, weight resistance (IKg load ME) It has excellent waterproofness and moisture permeability that can withstand more than 5000 cycles, and even when this product is stretched by 20 degrees both vertically and horizontally, it has a water pressure resistance of 1
It has 900 mmH2O/C1 fl, and no water leakage was observed after Buntesman test (550 mm x 2 hours).
Moreover, the water leakage resistance index to the back surface was 80.

Moreover, it has extremely good washability, with almost no change in physical properties even after 5 washes, making it suitable for ski anoraks,
Other suitable uses include sportswear and raincoats.

Example 2 Polyester polyurethane distoner (100% modulus 80, tensile strength 560).

Breaking elongation 550%) 20 parts by weight, fluorine-based water repellent 1
A coating liquid was prepared by dissolving 4 parts by weight of an anionic surfactant (Noda salt of sulfoconophosphate alkyl ester) in 75 parts by weight of dimethylformamide. The viscosity of this coating liquid is 4500 CI) S/30
'C.

The coating solution was applied to the smooth surface of a polyester fabric having appropriate mold release properties obtained by the same treatment as in Example 1 using a knife over roll coater for approximately 2,007 hours.
/7712 was applied, then immersed in an aqueous solution containing 10 parts by weight of dimethylformamide to gel at 30°C for 5 minutes, washed with hot water at 80°C for 30 minutes, and dried with hot air at 160°C. Heat treatment was performed at C for 30 seconds.

In this way, a highly elastic polyurethane film having a microporous structure was formed.

Polyester-based polyurethane nystomer (active ingredient 70%) 1
Adhesive liquid (viscosity 3500 cps/3o °C)
Using a gravure roll caulk engraved in a grid pattern of 30 meshes, apply approximately 35S'/2 dots of
It was dried with hot air at °C.

Elastic fiber interwoven nylon - futricot, which has stretchability of 190 degrees in length and 110 degrees in width, was laminated in a non-tensioned state, lightly nipped in a mangle, heated to 110"C, and further heated to 40 degrees. Aging was performed at C for 24 hours.

Subsequently, a trichlene solution containing 2 parts by weight of a fluorine-based water repellent was applied to the surface of the stretchable base fabric, and heat treated at 140°C for 5 minutes.

After the above treatment, the polyurethane film surface and the releasable fabric were peeled off.

Next, 100 parts by weight of a polyester polyurethane elastomer (70% active ingredient) and 1) Mef O-Rufrono: /
-) 15 parts by weight of Louis Rencione Ane-1 (molar ratio 1:3) adduct and 5 parts by weight of a crosslinking accelerator were added to 6 parts by weight of Kijirol.
Adhesive liquid (viscosity 3500C) prepared by dissolving 0 parts by weight
pS/30°C) intermittently at approximately 30°C using a gravure roll coater. /, 2 coats, vertical 140 on this coated surface
(Yellow 170% stretch crimped nylon jersey knitted fabric (nylon 70 tenier)
It was heated at .degree. C. and further aged at 40.degree. C. for 24 hours.

The obtained product has a three-layer structure, and is laminated through a microporous polyurethane membrane, which hardly impairs the shrinkability of the base A and B, and has a texture of 4 layers. flexible and
Water pressure 2000 mm H20/Cd, Buntesman rain test 550 mm x 2 hours, no leakage, moisture permeability 3
2.24 hours to 500, 4 kneading strength (I Kq load) 5
It has excellent moisture permeability and waterproofness of over 91,000 times, and even when this product fabric is lengthened by 20% both vertically and horizontally, its water resistance does not decrease at all, making it a fine material. Even after the test (550 mi x 2 hours), no water leakage was observed, and the wet water resistance index was 60. Moreover, the washing resistance is extremely good, and the physical properties hardly change even after washing 5 times.

Agent Patent Attorney Makoto Ogawa - Patent Attorney Masaru Noguchi Patent Attorney Kazuhiko Saishita Procedural Amendment 1982-11++31u Director-General of the Japan Patent Office 1, Indication of Case 1975-1 Patent Application No. 186855
J2, Name of the invention Stretchable breathable waterproof fabric 3, Person making the amendment Relationship to the case Patent applicant (IB +'l'r (+yo, □) (31s)
Toshi Co., Ltd. L″Q e <Name 44:ゝ Daiichi Race Co., Ltd. 4, Agent Address 31'l J3-3 J Pelican Building 7, Minato-ku, Tokyo 105 Contents of amendment (1 ) Amend the scope of claims as shown in the attached sheet.

(2) Page 3 of the specification, lines 2 to 16, "Polyurethane...exists in stretchable, moisture-permeable, waterproof fabric." is amended as follows.

``A fabric having a stretchable base fabric on at least one side of a microporous membrane mainly composed of polyurethane, the fabric has an elongation rate of at least 20% in the longitudinal and lateral directions, and a moisture permeability of at least 3000'. /m2・24 hours or more, and the Bundesmann test showed no water leakage after 2 hours in both the non-stretched state and when stretched by 20% in both length and width, and the water leakage resistance index was The present invention relates to a stretchable moisture-permeable waterproof fabric characterized by having a polyurethane polyester fiber having a polyurethane resin of 50 or more.

In addition, the invention of wooden tablet 2 has a stretchable base fabric on at least one surface of a microporous membrane mainly made of polyurethane,
The elongation rate in the vertical and horizontal directions is at least 20%, the moisture permeability is at least 30009/rnζ24 hours or more, the water pressure resistance is 1500 mm or more, and the water pressure resistance when stretched by 20% in both the vertical and horizontal directions is 1000- or more. A stretchable, moisture-permeable, waterproof fabric characterized by: (3) Line 4 from the bottom of page 6 of the specification 1'-9000P/m" J to "9000 f 7m2
-24 R”.

(4) On page 9, lines 13 to 15, "Next, the fabric of the present invention...preferably has a size of 80 or more." is amended as follows.

[Next, no water leakage according to the present invention means that the amount of water leakage in the rain tester is zero ac, and the water leakage resistance index is 50 or more, preferably 80 or more. (5) On page 15, line 11, [triisocyanate] is corrected to [triisocyanate J].

(6) ``Trimethylolpropane'' on page 15, line 20 is corrected to ``trimethylolpropane.''

(7) Same page 16, line 13 Correct "Povaru" to "Povaru".

(8)　Page 17, line 4 of the specification Correct ``sparse dog'' to ``1 coarse''.

(9) ``Silicone water repellent'' on page 18, lines 11-12 is corrected to ``1 silicone water repellent''.

〇〇) Page 19, line 16 [65Kf/,, 2. Tensile strength 500 to 9/, zJ [6
5Ky/cri.

Tensile strength is corrected to 5001 (g/, 7 J).

(11) Change “2000m/mH2O/m2” from page 22, line 7 of the same page to [2000rn/m
H2O/cn? Correct it with J.

(121, page 23, line 11 Correct “coating liquid” to “coating liquid”.

(Attachment) Claim 1: A stretchable moisture-permeable waterproof fabric characterized by having a stretchable base fabric on at least one surface of a microporous membrane mainly made of polyurethane.

2. A microporous membrane mainly composed of polyurethane, which has a stretchable base fabric on at least one side, has an elongation rate of at least 20 inches in the vertical and horizontal directions, and has a moisture permeability of at least 300 cm.
A stretchable moisture-permeable waterproof fabric having a water pressure resistance of 1500+mn or more for 0''/m'・24 hours or more, and a water pressure resistance of 1000 van or more when stretched by 20% in both length and width.

217-

Claims (1)

[Scope of Claims] 1. A microporous membrane mainly composed of polyurethane, which has a stretchable base fabric on at least one side, has an elongation rate of at least 20% in the vertical and horizontal directions, and has a 2. A stretchable, moisture-permeable, waterproof fabric that exhibits no water leakage after hours and has a water leakage resistance index of 50 or more when stretched by 20% both lengthwise and widthwise. 2. A microporous membrane mainly made of polyurethane has a stretchable base fabric on at least one side, has an elongation rate of at least 20% in the vertical and horizontal directions, and has a water pressure resistance of 1500 tr.
tm or more, and has a water pressure resistance of 1000 mm or more when stretched by 20 degrees both lengthwise and widthwise.