WO2004050345A1

WO2004050345A1 - Moisture permeable waterproof woven fabric excelling in tearing strength and process for producing the same

Info

Publication number: WO2004050345A1
Application number: PCT/JP2003/014686
Authority: WO
Inventors: Noriki Fukunishi; Yoshihiro Matsui
Original assignee: Toyo Boseki Kabushiki Kaisya
Priority date: 2002-12-04
Filing date: 2003-11-18
Publication date: 2004-06-17

Abstract

A moisture permeable waterproof woven fabric comprising a woven base cloth, the woven base cloth composed of synthetic filament yarns of 50 dtex or less fineness containing 1.0 wt.% or more of inorganic fine particles, and at least one resin layer, which moisture permeable waterproof woven fabric exhibits a tearing strength of 5 N or greater in the warp tearing and weft tearing directions. There is further provided a process for producing an excellent moisture permeable waterproof woven fabric, comprising first heating in vacuum polyamide resin chips so as to exhibit a relative viscosity of 2.8 or higher, subjecting the same to a one-step spinning process so as to obtain multifilament yarns of 30 to 50 dtex total fineness and 0.5 to 1.5 dtex single filament fineness, thereafter weaving the yarns and providing the woven fabric with at least one resin layer. By this process, there can be obtained a moisture permeable waterproof woven fabric of dull feeling which excels in tearing strength irrespective of thin fabric.

Description

TECHNICAL FIELD The present invention relates to a moisture-permeable waterproof fabric excellent in tear strength and a method for producing the same.

The present invention relates to a moisture-permeable and waterproof fabric made of a thin base fabric having a dull feeling and having excellent tear strength, and a method for producing the same. Background art

In recent years, as interest in comfort and health has increased, especially for use in clothing and living materials, fabrics that have moisture permeability, waterproofness, and water repellency, and have a light and flexible feel are required. It has become to. Conventionally, as a method of realizing such a demand, for example, a method of laminating a polymer film on a cloth made of bulky yarn obtained from nylon 66 multifilament has been generally used. BACKGROUND ART Fabrics having a water-repellent, water-repellent and water-repellent function are widely used in sports clothing such as windbreakers, and in dust-removing clothing utilizing their high dust-removing property and low dust-producing property. A waterproof fabric having a waterproof and moisture-permeable urethane resin film on the back surface of such a polyester fabric is excellent in moisture permeability and waterproofness, but has a drawback that the tear strength of the fabric is low. . This is thought to be because the resin penetrates into the inside of the fiber structure of the fabric, and the braces restrain the fibers and significantly reduce the degree of freedom of the fibers, so that the texture of the obtained fabric hardens and its tear strength decreases. ing. It is extremely difficult to avoid the problems of hardening of the hand and lowering of the tear strength even if a soft resin such as urethane is used. As a measure to increase the tear strength, a multifilament of 70 dtex or more is generally used.

In addition, measures have been taken to interweave high-elastic yarns such as aramide fibers.However, the difference in shrinkage between the high-elastic yarns and nylon or polyester yarns is too large. Even when a urethane film having moisture permeability and waterproofness was laminated in this state, the adhesion between the fabric and the urethane film was poor, and the urethane film was easily peeled off. Furthermore, among the yarns in which the high elasticity yarn is interwoven with nylon yarn or polyester yarn, the yarns in which the high elasticity yarn is interwoven in a lattice shape in the horizontal direction are particularly high elasticity yarns after dyeing or heat treatment. The intersection point of the weft yarn becomes thicker, and the intersection point becomes the most protruding state even after the urethane film is laminated. For this reason, the protruding portion is easily worn when the fabric is washed, and the wear portion is easily broken in a water resistance test after washing, so that only a fabric with low water resistance can be obtained. Therefore, in order to improve the water resistance by this processing method, a method of making the urethane film very thick or the like was used, and there was a drawback that the fabric became thick and heavy.

As a countermeasure, the yarn is composed of a yarn containing low-shrinkage organic yarn A and high elastic yarn B, and the high elastic yarn B is interposed in the direction of the weft and / or the horizontal so that the weight of the high elastic yarn B is 10% or less of the weight of the fabric. A waterproof fabric that is flat and has high elasticity and no looseness in the high elasticity yarn B has been proposed, but the use of high elasticity yarns, especially high elasticity yarns with high fineness, makes the fabric thicker and harder. Also, because of the different dyeing properties, the design was inferior and was not preferable as a garment (for example, see Japanese Patent Application Laid-Open No. 6-220779 (claims)).

An object of the present invention is to provide a moisture-permeable waterproof fabric excellent in tearing strength despite having a dull feeling and a thin fabric, and a method for producing the same. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is an organization chart showing a mini-lip organization, which is an embodiment of a ribstop organization.

FIG. 2 is an organization diagram showing a double lip organization which is another embodiment of the ribstop organization.

Figure 3 is an organization chart showing a flat organization. Disclosure of the invention

The present inventors have conducted intensive studies to achieve the above object, and as a result, by improving the multifilament polymer constituting the base fabric, the moisture permeability that satisfies the tearing strength even when a resin is applied to a thin base fabric. The invention of a waterproof fabric and a method for producing the same have been achieved. That is, the present invention

1. It is composed of a woven fabric base made of synthetic filament yarn with a fineness of 50 decitex or less and containing inorganic fine particles of 1.0 wt% or more and at least one resin layer, and has a tear strength of 5 N in the warp tear direction and the weft tear direction. A moisture-permeable waterproof fabric excellent in tear strength, characterized in that:

2. The moisture-permeable waterproof fabric excellent in tear strength according to the above item 1, wherein the synthetic filament yarn is made of a polyamide having a relative viscosity of 2.8 or more.

3. The first or second above, wherein the structure of the woven fabric is a rib-stop structure, and the number of yarns inserted into a plurality of warp and weft yarn insertion portions is 20 / 2.54 cm or more, respectively. 2. A moisture-permeable waterproof fabric excellent in tear strength according to item 1.

4. The moisture-permeation and waterproofness excellent in tear strength according to any one of the above items 1 to 3, wherein the ratio of the cover factor of the warp to the weft of the woven fabric is 45:55 to 60:40. Fabric.

5. It is characterized in that at least one resin layer is a porous membrane, the moisture permeability is 6000 g / m ² · 24 hrs or more according to the A-1 method, and the water pressure resistance is 60 kPa or more. The moisture-permeable waterproof fabric excellent in tear strength according to any one of the first to fourth aspects described above.

6. Make sure that at least one resin layer is a non-porous membrane, has a moisture permeability of at least 1800 g / m ² · 24 hrs by the B-1 method, and a water pressure resistance of at least 100 kPa. The moisture-permeable and waterproof fabric excellent in tear strength according to any one of the first to fourth aspects, characterized in that:

7. A method for producing a moisture-permeable and waterproof fabric excellent in tear strength according to any of the first to sixth aspects, wherein the solid contains lw% or more of titanium oxide and has a relative viscosity of 2.7 or less. The polyamide resin chip of the above is heated under reduced pressure to a relative viscosity of 2.8 or more, and a one-step spinning method is used to obtain a multifilament yarn having a total fineness of 30 to 50 dtex and a single yarn fineness of 0.5 to 1.5 dtex, and woven fabric. A method for producing a moisture-permeable and waterproof fabric having excellent tear strength, comprising applying at least one resin layer after the above. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described in detail.

The moisture-permeable waterproof fabric according to the present invention comprises a woven fabric base made of synthetic filament yarn and at least one resin layer selected from a polyurethane polymer. It is.

The synthetic filament yarn referred to in the present invention is a filament yarn made of a polyester such as polyethylene terephthalate, polytrimethylene terephthalate, polytetramethylene terephthalate, or a polyamide such as an aliphatic polyamide or an aromatic polyamide. For example, it means a filament yarn made of nylon 6, nylon 66, a filament yarn made of a polyolefin such as polyethylene or polypropylene, or a filament yarn made of a synthetic resin such as an acrylacrylite-based filament yarn. In view of the texture and tear strength of the fabric, nylon filaments, particularly nylon 6, are preferably employed. In the case of polyester, other third components may be copolymerized within a range that does not impair the object of the present invention. Specifically, dicarboxylic acids such as adipic acid, oxalic acid, sebacic acid, isophthalic acid, and 5-sodium sulfoisophthalic acid, daricols such as diethylene glycol and polyethylene dalicol, and addition of pisphenol A or its ethylene oxide Substances, oxycarboxylic acids such as hydroxybenzoic acid, etc. can be used alone or in combination of two or more. Additives such as a matting agent, an antioxidant, a fluorescent brightener, an ultraviolet absorber, an antistatic agent, and a flame retardant may be further compounded within a range not to impair the object of the present invention.

The inorganic fine particles contained in the synthetic filament yarn are not particularly limited, and any inorganic fine particles can be used. The type of inorganic fine particles to be added varies depending on the target fiber.For example, when the purpose is to obtain an ultraviolet shielding fiber, fine particles that reflect or absorb ultraviolet light, that is, fine particles that do not substantially transmit ultraviolet light, are used. Used. Typical examples thereof include inorganic compounds such as titanium dioxide, zinc oxide, magnesium oxide, alumina, silicon dioxide, barium sulfate, calcium carbonate, sodium carbonate, talc, and kaolin, and various kinds of fine particles treated with inorganic compounds. One or a mixture of two or more can do. More preferred are titanium dioxide, zinc oxide and alumina. Particularly preferred is titanium dioxide. It is desirable that the addition amount be 1 wt% or more in order to obtain a dull surface, and more preferably 2 wt% or more, but if it exceeds 5 wt%, the spinning operability will be significantly deteriorated, Preferably, the content is 4 wt% or less because the strength of the fiber is reduced. In addition, for the purpose of obtaining, for example, brightly colored fibers, inorganic pigments are used as inorganic fine particles. Further, when the purpose is to obtain conductive fibers, conductive metal oxides and metal powders are used as inorganic fine particles. When the purpose is to obtain magnetic fibers, iron, cobalt, nickel, etc. Metals and magnetic powders of these oxides or ferrites are used as inorganic fine particles. The content of inorganic additives is determined by measuring according to JISL 1013 (8.25 ash), but when the inorganic additive is titanium oxide, it can also be measured according to JISL 1013 (8.26 titanium oxide). it can. The average particle diameter of the inorganic fine particles is preferably 5 or less, particularly preferably 1 / X or less. If the particle size is too large, problems such as clogging in the filter during spinning and yarn breakage will occur, and yarn breakage will also occur during drawing. The average particle size mentioned here is a value measured using a particle size distribution analyzer (CA PA-500) manufactured by Horiba, Ltd. The shape of the inorganic fine particles can be used without limitation, such as polygonal, needle-like, spherical, cubic, spindle-like, and plate-like. However, the shape of the inorganic fine particles is spherical or spindle-like in view of dispersibility and abrasion resistance. I prefer it.

It is desirable that the fineness of the filament yarn constituting the woven fabric is 50 decitex or less. If it exceeds 50 decitex, the fabric becomes thicker and the difference from the conventional one disappears, so it is out of the scope of the present invention. Due to the texture and lightness of the fabric, it is preferably 45 dtex or less, and more preferably 40 dtex or less. As a result, the thickness of the moisture-permeable and waterproof fabric can be reduced to 0.15 mm or less. A preferred range of the thickness is 0.13 mm or less, which is good in terms of lightness and softness. ^ Since the single yarn fineness also greatly affects the texture, it is preferably 1.5 dtex or less, and more preferably 1.0 dtex or less. preferable. The cross-sectional shape may be any shape such as a polygon such as a circle, a triangle, or a square, a flat, hollow, star, or gear type. There is no particular limitation in the present invention.

The resin used for at least one resin layer constituting the moisture-permeable and waterproof fabric is a resin alone containing a polyurethane-based, acrylic-based, polyester-based, polyamide-based, silicone-based, or fluorine-based polymer alone, or It is also possible to mix and use one or more kinds of inorganic fine particles and organic fine particles, especially fine particles having high moisture absorption / desorption and heat generation.

The tear strength of the moisture-permeable waterproof cloth is preferably 5 N or more in both the warp tear direction and the weft tear direction. If the tear strength is less than 5 N, tearing is likely to occur at a site where elasticity is required, such as an elbow, when worn. Therefore, the tear strength is preferably 7 N or more, more preferably 1 ON or more. If the thickness of the fabric is increased, that is, if the fineness of the constituent fibers is increased, the tear strength can be improved. However, since the thickness increases, the fineness of the fibers used is preferably 50 decitex or less. The higher the tear strength, the better, but if it exceeds about 3 ON, the spinning operability tends to be inferior, and it is difficult to produce stably, so it is not so preferred.

The relative viscosity of the polyamide filament is preferably 2.8 or more. In the present invention, it is important to increase the molecular weight of filaments, in other words, the relative viscosity, more than the structure of the woven fabric, in order to obtain a fabric in which the tear strength is not significantly reduced even when the resin layer is applied. Clarified. The more preferable range is 3.0 or more, but it is more preferably less than 5.0, more preferably less than 4.0, from the viewpoint of spinnability.

The fabric base fabric constituting the moisture-permeable waterproof fabric of the present invention is preferably a fabric having a ripstop structure such as a single lip / double lip. A ribstop structure in which thick yarns and aligned yarns are arranged at several mm intervals in the background is resistant to tearing, and is widely used especially in light fields such as paragliders where tearing is required. The structure preferably has at least 6 / 2.54 cm or more multifilament insertion portions in which two to three ground yarns are aligned at the same opening in the weft direction, and in particular, 2.54 cm (= 1 The number of thread insertions multiplied by the number of thread insertion sections between two inches and the number of threads aligned in a single thread insertion section is 20 or more. Is preferred. If the number of yarns to be aligned at the same opening is four or more, the aligned yarns are likely to overlap each other, causing a step (unevenness) between the yarn and the ground structure, resulting in a large number of yarns after resin coating. It is not preferable because the resin coating of the thread insertion portion becomes thin, resulting in poor durability and easy peeling. 2. It is not preferable that the number of inserted yarns multiplied by the number of the multi-thread insertion portions between 54 cm and the number of aligned yarns is less than 20, since the tearing strength is difficult to satisfy 5N. On the other hand, if it exceeds 80, the texture of the dough becomes hard, which is not preferable. It is more preferably 25 or more and 70 or less, and further preferably 30 or more and 60 or less.

In the present invention, it has been found that when the fiber strength is the same, the tear strength increases as the density of the base fabric increases and the cover factor increases. In order to balance the tearing strength between the warp tearing direction and the weft tearing direction, the ratio of the cover factor between the warp and the weft of the woven fabric fabric constituting the moisture-permeable waterproof fabric is preferably 45:55 to 60:40. . If the cover factor ratio of the warp is lower than 45%, the operability during weaving deteriorates and the strength in the warp tear direction tends to be less than 5 N, and if it exceeds 60%, the strength in the weft tear direction tends to be less than 5 N. . More preferably, the ratio is 47:53 to 55:45, more preferably 50:50 to 53:47. Note that the cover factor (CF) is a coefficient that represents the ratio of the yarn cross-section occupied by the unit area, and is expressed by the formula: {Yarn fineness (decitex)} ¹² X {Woven density (lines / 2.54 cm) }, The higher the cover factor value, the smaller the gap, that is, the higher the denseness

Is shown.

The total warp and weft cover factor is preferably between 1500 and 2200, more preferably between 1550 and 2150 and more preferably between 1600 and 2100. ■ When the resin layer constituting the moisture-permeable waterproof fabric of the present invention is a porous membrane type, the moisture permeability of the moisture-permeable waterproof fabric is 6000 g / m by the measurement method of JISL-1099 (A-1 method). It is preferably at least ² · 24 hr, and the water pressure resistance is preferably at least 60 kPa according to the JISL-1092 measurement method. (A- 1) method moisture permeability of 6 000 g / m ² - is less than 24 hr, will be feel a sense of stuffiness during summer wear, also when the water pressure resistance is less than 60 kP a, sufficient waterproofness Not available, in the rain Water may leak when clothes are worn, which is not very desirable. More preferably (Method A-1), the water vapor permeability is more preferably 7000 g / m ² · 24 hr or more, and even more preferably 8000 g / m ² • 24 hr or more, but if it is too high, the water pressure resistance tends to decrease. ^{Therefore, 15000 g / m 2 - 24} hr , more preferably not more than 14000 g / m ² - 24h r less. Also, if the water pressure is too high, the moisture permeability tends to decrease, so the preferable range is from 70 kPa to 160 kPa, more preferably from 80 kPa to 140 kPa.

When the resin layer constituting the moisture-permeable and waterproof fabric of the present invention is a non-porous membrane type, the moisture permeability is 18,000 g / m ² '24 hr according to the measurement method of JISL-1099 (B-1 method). It is necessary to have a water pressure resistance of at least 60 kPa according to JISL-1092. (Method B-1) If the moisture permeability is less than 18,000 g / m ² · 24 hr, you will feel a stuffy sensation when you wear it in winter, and if the water pressure drops below 10 OkPa, Lack of sufficient waterproofing performance may result in water leakage during clothes in the rain. Preferably (method B-1), the moisture permeability is more than 20000 g / m ² · 24 hr, more preferably more than 22000 g / m ² · 24 hr, but if it is too high the water pressure tends to decrease. The upper limit is 60000 g / m ² · 24 hr or less, more preferably 40,000 gZm ² ′ 24hr or less. If the water pressure is too high, the moisture permeability tends to decrease, so that the preferred range is from 120 kPa to 250 kPa, more preferably from 150 kPa to 210 kPa.

Although there is no particular limitation on the method for producing the moisture-permeable waterproof fabric of the present invention, in a preferred embodiment, a solid polyamide resin chip containing titanium oxide of lwt% or more and having a relative viscosity of 2.7 or less is heated under reduced pressure. To obtain a multifilament with a total fineness of 30 to 50 dtex and a single-fiber fineness of 0.5 to 1.5 dtex by a one-step spinning method. And providing a layer. It is also preferable to carry out one or more calendering steps on one or both sides at a stage before applying the resin layer to increase the water pressure resistance. It is possible to increase the degree of polymerization by heating the polyamide resin containing titanium oxide in a molten state under reduced pressure in the molten state, but the melt viscosity increases. Not only is it easy for clogging to occur in the sewage pipes, but especially at high viscosities with relative viscosities of more than 2.7, the quality of the titanium oxide is not stable because biased titanium oxide tends to occur. Increasing the degree of polymer polymerization by solid-state polymerization is a means of minimizing these problems. In the spinning method, it is possible to produce both the two-step method consisting of the spinning step and the drawing step and the one-step method such as the continuous spinning drawing method and ultra-high-speed spinning method, but it contains a large amount of titanium oxide. Since the fibers have abrasion due to friction with guides, etc., it is better to keep the spinning process as simple as possible. Furthermore, in the two-step spinning method, in which the drawing speed is slow, draw strain tends to occur partially, and for example, there is a problem in that strain is concentrated in a portion where a large proportion of titanium oxide is present, and the yarn breaks easily. For this reason, the one-step spinning method is preferably employed. Example

Hereinafter, the present invention will be described with reference to specific examples, but the present invention is not limited thereto. In addition, each characteristic value in the examples was measured according to the content of inorganic fine particles: JIS 1013 measured by the following method.

Fineness: Measured according to JIS L1013.

Tear strength: Measured according to the pendulum method described in JIS L-106.

Relative viscosity: 96.3 ± 0.1 wt% Resolve the sample in a special grade concentrated sulfuric acid so that the polymer concentration is 1 Omg / m1, adjust the sample solution, and then add the sample at 20 ° C ± 0.1. Measure the relative viscosity of the solution using a Ostwald viscometer with a water fall time of 6 to 7 seconds at a temperature of 0 5. The same viscometer was used for the measurement, and the ratio of the drop time T 0 (second) of sulfuric acid 2 Om1 and the drop time T 1 (second) of sample solution 20 m1 was the same as when the sample solution was adjusted. The relative viscosity RV is calculated using the following equation.

RV = T 1 / T 0

Moisture permeability:

(A-1): Measured according to JIS L-109 (A-1 method). (B-1): Measured according to JISL-1099 (B-1 method).

Water pressure resistance: Measured according to JISL-1092.

Fabric thickness: The thickness of the moisture-permeable and waterproof fabric was measured according to the thickness of JIS L-1096.

Glossiness: Determined visually.

(Examples 1 to 8, Comparative Examples 1 to 3)

(Example 1)

Relative viscosity containing 2 wt% of titanium oxide 2.5 Nylon 6 resin is adjusted to 3.1 by solid-state polymerization by heating under reduced pressure, and the strength is increased by conventional spinning continuous drawing method 4.7 dNZd te X A nylon 6 fiber of 44 decitex and 34 filaments having an elongation of 46% and a boiling water shrinkage of 11.5% was obtained. The fibers were used for warp and weft, woven in a mini-lip structure (FIG. 1), dyed by a conventional method, calendered, and finished. The cover factor ratio of the obtained fabric was 51:49, and the number of inserted fabrics was 43 and the weft was 41. The cloth was impregnated with a 6% solution of Asahigard A G710 (a water repellent manufactured by Asahi Glass Co., Ltd.), squeezed with a mangle, dried, and then heat-treated at 160 ° C. for 30 seconds. The following resin was applied to this cloth with a knife coater, guided into water, coagulated for 2 minutes, washed with 55 ° C hot water for 8 minutes, and dried. The following resin composition was blended for the porous membrane.

Ester-based polyurethane resin containing silicon oxide

Ether polyurethane resin

N, N'-dimethylformamide

HU-720P (Hygroscopic particles: manufactured by Nippon Xelan Industry Co., Ltd.)

Colony HL

The fabric surface of the obtained fabric had a dull feeling, and was a moisture-permeable waterproof fabric excellent in tearing strength despite being thin. Table 1 shows the physical properties.

(Example 2)

Except for changing the resin component of the fiber to nylon 66, weaving it with a double lip structure (Fig. 2), then applying the following resin film by the dry method and applying it: Created almost the same as 1.

Film forming conditions: After the base fabric is subjected to a known dyeing finish, the fabric is impregnated with a 6% solution of Asahigard AG710 (a water repellent manufactured by Asahi Glass Co., Ltd.), squeezed with a mandal, and dried. Heat treatment was performed at 160 for 30 seconds. On the other hand, the following resin was applied to release paper at NIFCO Co., Ltd., and dried at 100 ° C. using an air oven to obtain a nonporous membrane. A resin film was applied to the cloth using an adhesive resin by a lamination method. Water swellable ester polyurethane resin 7 5 parts Water swellable ether polyurethane resin 35 5 parts

N, N'-dimethylformamide 80 parts

HU-720P (moisture-absorbing and desorbing fine particles: manufactured by Nippon Xelan Industry Co., Ltd.) 10 parts Coronate HL 3 parts The resulting fabric has a dull feeling and excellent tear resistance despite thin fabrics. It was a waterproof fabric. Table 1 shows the physical properties.

(Comparative Example 1)

1155 Nanairolon 66 resin resin having a relative viscosity to viscosity of 22..55 was prepared by spinning continuous continuous drawing method to form 77 88 TT 33 44 Filamara Menmento. Except that the ratio of the factor factor was set to 55 66 :: 4444, the procedure was in accordance with Example 11 of the practical example. . The obtained cloth cloth has a feeling of dadarul, and is excellent in tearing and tearing strength. However, the tearing strength in the warp direction and the weft direction is poor, and the barbara runance is poor, and the thickness is as thick as 00..22 22 mmmm. It was a good thing that was thick. . Table 11 shows the physical properties of each. .

2200 ((Comparative Comparative Example 22))

Except for the fact that Nanairolon 66 resinene having a relative viscosity to viscosity of 22..55 was prepared by using the well-known Wanunsuteppu spinning method, to form a filler. According to the working example 11. . The resulting fabric is thin and thin, and although it may have the feeling of having a dadaruul feeling, it is inferior to tearing and breaking strength. It was only a moisture-permeable, moisture-proof, waterproof, water-resistant fabric. . Table 11 shows the physical properties of each. .

2255 ((Comparative Comparative Example 33))

Acid oxidized tititatan containing 00..33 ww tt %%

A 56 T34 filament was prepared by a spinning method, and was prepared in accordance with Example 2 except that a woven fabric having a flat structure (FIG. 3) was woven. The resulting fabric was a slightly thicker moisture-permeable waterproof fabric having no dullness and inferior tear strength. Table 1 shows each physical property Shown in

(table 1 )

Industrial applicability

According to the present invention, by appropriately adjusting the relative viscosity of the fibers constituting the dough and the content of the inorganic fine particles, a moisture permeable material having a dull feeling and having excellent tearing strength despite being a thin fabric. It has become possible to provide a waterproof fabric and a method for producing the same. The moisture-permeable waterproof fabric of the present invention can be suitably used for sports clothing such as windbreakers.

Claims

The scope of the claims

1. Consisting of a woven fabric base made of synthetic filament yarn with a fineness of 50 decitex or less and containing inorganic fine particles of 1.0 wt% or more and at least one resin layer, the tear strength in the warp tear direction and the weft tear direction is high. A moisture-permeable and waterproof fabric excellent in tearing strength, characterized in that it is 5 N or more.

2. The moisture-permeable and waterproof fabric having excellent tear strength according to claim 1, wherein the synthetic filament yarn is made of a polyamide having a relative viscosity of 2.8 or more.

3. The structure of the woven fabric is a ribstop structure, and the number of yarns inserted into the plurality of yarn insertion portions in the warp direction and the weft direction is 20 or more Z2.54 cm or more, respectively. Item 3. A moisture-permeable waterproof fabric excellent in tear strength according to Item 1 or 2.

4. The tear strength according to any one of claims 1 to 3, wherein the ratio of the cover factor of the warp and the weft of the woven fabric is 45:55 to 60:40. Moisture permeable waterproof fabric.

. 5 at least one layer of the resin layer is a porous membrane, in moisture permeability A- 1 Method ^{6 0 0 0 g / m 2} - 2 4 hrs or more, and water pressure is 6 0 k P a more cloth A moisture-permeable waterproof fabric excellent in tear strength according to any one of claims 1 to 4, characterized in that:

6. At least one resin layer is a non-porous membrane, has a moisture permeability of 1800 g / m ² · 24 hrs or more according to the B-1 method, and a water pressure of 100 kPa or more. The moisture-permeable and waterproof fabric excellent in tearing strength according to any one of claims 1 to 4, which is a fabric.

7. A method for producing a moisture-permeable and waterproof fabric having excellent tear strength according to any one of claims 1 to 6, wherein the solid contains lwt% or more of titanium oxide and has a relative viscosity of 2.7 or less. The polyamide resin chip is heated under reduced pressure to a relative viscosity of 2.8 or more, and a multi-filament yarn having a total fineness of 30 to 50 dtex and a single yarn fineness of 0.5 to 1.5 dtex is obtained by a one-step spinning method. A method for producing a moisture-permeable and waterproof fabric having excellent tear strength, which comprises applying at least one resin layer after forming a woven fabric.