JPH06220779A - Waterproof fabric and its production - Google Patents

Abstract

PURPOSE:To obtain a thin, lightweight and smooth waterproof fabric, free from the slack inherent in highly elastic yarns, excellent in water resistance and moisture permeability even after washed, also excellent in tear strength an resistance to cutting. CONSTITUTION:An interlaced woven fabric comprising low-shrinkage organic yarns A and highly elastic yarns B with the boiling water shrinkage difference between the yarns A and B being <=5% and the yarns B intermittently woven thereinto both longitudinally and laterally so as to account for <=10wt.% of the woven fabric, is dyed and calendered and then coated with a resin to provide a resin film bonded firmly thereto.

Description

Detailed Description of the Invention

[0001]

The present invention relates to sports, leisure,
The present invention relates to a base cloth which is excellent in water resistance such as work clothes to be worn during outdoor work, has moisture permeability, is light and has strong tear resistance and cut resistance.

[0002]

2. Description of the Related Art A waterproof cloth made by laminating a urethane resin film having waterproofness and moisture permeability on the back surface of nylon or polyester fabric has excellent moisture permeability and waterproofness, but has a low tear strength and low cut resistance. was there. In order to make up for this drawback, the woven fabric of high elastic yarn such as aramid fiber has a too large difference in shrinkage between the high elastic yarn and nylon yarn or polyester yarn. Even when a urethane film having moisture permeability and waterproof property was laminated in this state, the adhesiveness between the woven fabric and the urethane film was poor and the urethane film was easily peeled off.

Further, among the high-elasticity yarns woven together with nylon yarns or polyester yarns, the high-elasticity yarns woven in a warp or lattice pattern in the weft direction are particularly high-elasticity yarns after dyeing or heat treatment, The thickness of the intersection of the weft threads becomes thicker, and even after the urethane film is laminated, the intersection is in the most protruding state. Therefore, when the cloth is washed, the protruding portion is easily worn and the worn portion is easily broken in the water resistance test after washing, so that only the cloth having low water resistance can be obtained. Therefore, in order to improve the water resistance by this processing method, a means such as making the urethane film extremely thick is used, and thus the cloth becomes thick and heavy.

[0004]

DISCLOSURE OF THE INVENTION The present invention is thin, light, smooth, has no slack in highly elastic yarns, and has water resistance even after washing.
The waterproof fabric has excellent moisture permeability, tear strength, and cut resistance.

[0005]

The present invention employs the following means in order to achieve such an object. That is, the waterproof fabric of the present invention is composed of the low shrinkage organic yarn A and the yarn including the high elastic yarn B, and the high elastic yarn B is 10 times the weight of the woven fabric.
%, Which is characterized in that the flat and highly elastic yarn B, which is woven intermittently in the vertical and / or horizontal directions, has no slack.

The method for producing a waterproof cloth of the present invention is a method for producing a mixed woven fabric comprising a low-shrinking organic yarn A and a yarn including a high-elasticity yarn B, and the difference in boiling water shrinkage between the yarns is 5 %
In the following, the highly elastic yarn B is intermittently woven in the warp and / or the weft direction so as to be 10% or less of the weight of the mixed woven fabric, calendered after dyeing, and a resin film is applied.

[0007]

In the present invention, the low-shrinkage organic yarn refers to commonly used fibers such as polyamide, polyester, acrylic and vinylon. Particularly, polyamide and polyester fibers have high strength of the original yarn and are dyeable, settable and urethane. It is preferable because it has excellent adhesiveness to a resin. The raw yarn weaving degree of these organic yarns is about 100 to 500 denier, and as a means for lowering the boiling water shrinkage, for example, after soft winding the raw yarn, steam or warm water at 80 to 110 ° C. for 10 to 3 is used.
It can be obtained by a method of treating for 0 minutes, or by treating on a hot plate having a dry heat of 180 to 220 ° C. at a speed of 200 to 400 m / min.

Generally, high elastic yarns have a very low boiling water shrinkage ratio. For example, when the high elastic yarns are aramid fibers such as Kevlar, the shrinkage ratio is 0%, so the boiling water shrinkage ratio of the organic yarns is 5%. If not treated as described below, the highly elastic yarn is slackened due to the contraction of the organic yarn, and the woven fabric becomes uneven. The method described above may be used to reduce the boiling water shrinkage to 5% or less.
The polyamide fiber is more effectively treated by steam treatment or hot water treatment, and the polyester fiber is more effectively treated by dry heat treatment.

The high elastic yarn is preferably an aramid fiber such as Kevlar or the like, which has a high Young's modulus such as acrylic and polyethylene, and the Young's modulus is preferably 300 g / denier or more. When the Young's modulus is lower than this, the tensile strength and cut resistance of the raw yarn are low, the tear strength after cutting into a fabric and the cut resistance are low, and it becomes difficult to obtain the effect of interweaving highly elastic yarns.

In general, high elasticity yarn is very expensive,
In order to obtain an effect with a small amount of use, aramid fibers having a high Young's modulus, flexibility and excellent adhesiveness with a resin are most preferable. The high-elasticity yarn interwoven with the low-shrinkage organic yarn may be a high-elasticity yarn in the form of a filament or staple, but a high-elasticity yarn mixed with an ordinary organic yarn such as polyamide or polyester may also be used. It may be mixed. This is to increase the shrinkage ratio of yarns including high-elasticity yarns by blending and mixed yarns, and to reduce the difference in shrinkage ratio with low-shrinkage organic yarns. It is not preferable because the cut resistance and tensile strength of the yarn and the mixed yarn become low.

As for the blending ratio and crossing ratio of the highly elastic yarn and the organic yarn, the weight of the organic yarn is preferably 50% or less of the weight of the yarn including the highly elastic yarn, and most preferably 20 to 30%. Smoothness of fabric after processing,
From the viewpoint of adhesiveness with a resin and cut resistance, staple fibers of high elasticity are most preferable. The fineness of the yarn including the high elastic yarn is preferably equal to that of the low shrinkage organic yarn, and is 100 to 500.
Denier is preferable.

When the yarn including the high elastic yarn is interwoven with the low shrinkage organic yarn, the weight of the high elastic yarn needs to be 10% or less of the weight of the interwoven fabric. This is because if the content exceeds 10%, the base fabric becomes hard and the adhesiveness with the urethane resin decreases. In order to maximize the effect of cut resistance and tear strength when the weight of the high elastic yarn is 10% or less of the weight of the mixed woven fabric, the yarn including the high elastic yarn is vertically and / or vertically interposed between the low shrinkage organic yarns. Alternatively, it is best to insert the high elastic yarns intermittently in the horizontal direction and arrange the high elastic yarns in a lattice pattern. In addition, as the yarn including the low-shrinkage organic yarn and the high-elasticity yarn, it is preferable to use a dendritic yarn in order to improve weavability.

The woven fabric after weaving will have some irregularities after the dyeing process, because the shrinkage rates of the two kinds of fibers to be woven are not completely the same. If the difference in shrinkage ratio is 5% or less, it can be made almost smooth by calendering in the next step. The term "smoothness" as used in the present invention means a wrinkle-like material due to creases or the like other than the warp due to the texture of the woven fabric and the bending of the weft.

The calendar is 30 kg at 150 to 180 ° C.
By passing it once or twice under a pressure of about / cm ² ,
In addition to eliminating the above-mentioned unevenness, it suppresses the intersection of high elastic yarns and flattens the surface of the fabric, so when laminating a high water resistant film on the fabric in the next step, it adheres compared to the one without calendering. Not only is the tenacity increased, but the intersections of the highly elastic yarns do not project, so the laminated film does not break even after washing due to abrasion during washing.

There are various types of calender rolls including resin rolls and metal rolls, metal rolls and metal rolls, etc., but rolls composed of resin rolls and metal rolls are preferred, and the next step is applied to the fabric surface that has passed through the metal rolls. It is most preferable to laminate a moisture permeable and water resistant film with.

The resin film (moisture permeable and water resistant film) to be laminated on the woven fabric preferably has a water resistance of 2 kg / cm ² or more, and is preferably a polyether type urethane having high film strength and having micropores. From the viewpoint of strength, it is preferable that the maximum diameter of micropores is 5 microns or less, but the number of micropores per unit area is preferably small. In this case, however, moisture permeability decreases, so moisture permeability and water resistance should be considered. However, it may be appropriately selected. Further, the film thickness is preferably as thin as possible in view of the thickness of the base fabric after processing, and is preferably 10 microns or less.

Adhesion to the woven fabric may be carried out by urethane-based adhesive on the entire surface or by spot adhesion using a gravure coater, and the overall adhesion has a higher adhesive force between the woven material and the moisture permeable water resistant film. At the time of adhesion, processing at about 100 ° C for 1 to 2 minutes is appropriate.

EXAMPLES The present invention will be specifically described below with reference to examples.

<Example 1> 300 m on a heating plate at 210 ° C
A 250-denier 48-filament Tetoron filament yarn in which the boiling water shrinkage rate of the original yarn was 3% was heat-treated at a speed of 1 / min, and right twist was applied at 110 times / m by a Ringnen yarn machine. Also, Kevlar 20 count yarn of wholly aromatic polyamide fiber having a Young's modulus of 500 g / denier, a single yarn weave of 1.5 denier, and a raw yarn having a boiling water shrinkage of 0% gave the same twist. This thread is glued and warped, vertical 56 threads / inch,
Woven at a density of 53 horizontal / inch. The Kevlar 20 count yarn was inserted between the Tetoron yarn of the ground yarn at a rate of 1 cm in both the length and width directions.

This woven fabric was treated with a disperse dye at 130 ° C. for 60
After dyeing for a minute, the product is immersed in a 3% solution of Asahi Guard AG710, a fluorine-based water repellent manufactured by Asahi Glass Co., Ltd., for water repellent treatment, and then passed once through a calendar roller made of metal and nylon resin at 180 ° C. After calendering, acrylic and urethane resin is applied to the woven fabric, and then 20 μm of urethane adhesive is applied to the woven fabric surface that is in contact with the metal roll surface during calendering. A moisture-permeable, water-resistant film made of polyether type one-component urethane was laminated at 100 ° C. for 1 minute and aged at 50 ° C. for 48 hours to obtain a base fabric of the present invention. The characteristics of this base fabric are shown in Example 1 in Table 1.

<Example 2> The same tetron yarn as in Example 1 was used as the ground yarn, and the inserted yarn had a Young's modulus of 500 g / denier, a single yarn weave of 1.5 denier, and a boiling water shrinkage of 0%. A Kevlar filament yarn of group dendritic polyamide fiber having a denier of 200 denier was used, and a right twist was applied at 110 times / m with a Ringnen yarn machine. These twisted yarns are glued, warped, weaved, dyed, water repellent, calendered, as in Example 1.
The characteristics of the base fabric obtained by processing the undercoat resin and laminating the moisture permeable and water resistant film are shown in Example 2 in Table 1.

Example 3 Nylon yarn of 210 denier, 48 filaments, boiling water shrinkage of 10% was rewound with a soft winder, treated with a steam setter at 100 ° C. for 30 minutes and dried to obtain a boiling water shrinkage of 1. 2% of raw yarn was obtained. As in Example 1, this raw yarn was used as a ground yarn with a Ringnen yarn machine and used as a ground yarn, and as a high elastic yarn was used in Example 2 and Kevlar filament yarn was used under the same conditions as in Example 1. did. This woven fabric was dyed with an acid dye at 100 ° C. for 60 minutes, and then subjected to the following water repellent treatment under the same conditions as in Example 1. The characteristics of this base fabric are shown in Example 3 in Table 1.

Comparative Example As a comparative example, nylon 210 denier, 48 filaments, and a raw yarn having a boiling water shrinkage of 10% were used, and the same twist as in Example 1 was applied without low shrinkage processing, and weaving was performed at the same density. . This comparative product does not use the insert yarn made of high elastic yarn, and the dyeing is acid dye at 100 ℃ ×
Stained in 60 minutes. This woven fabric was treated with water-repellent and then with the same undercoat resin as in Example 1 without calendering.
The same moisture permeable and water resistant film as in Example 1 was laminated. The characteristics of this base fabric are shown in Comparative Example 1 in Table 1.

Further, the same nylon raw yarn as in Comparative Example 1 was used, and the high elastic yarn used in Example 1 was used.
Dyeing was carried out at 60 ° C. for 60 minutes, and under the same conditions as in Comparative Example 1, water repellency, undercoat resin processing, and laminate processing of a moisture permeable and water resistant film were carried out to obtain a fabric of Comparative Example 2.

In Table 1, the basis weight, thickness, tensile strength / elongation and water repellency are in accordance with JIS K-6328 (rubbered cloth), tear strength is JIS K-6328 single tongue method, water repellency is According to JIS L-1092. Cut resistance is NT cutter A.N.
S. K Spare blade A150 Two tips are piled up and the angle is 60
It is shown by the highest value of resistance when the sample is cut by the blade edge by pressing the sample set horizontally at a speed of 500 mm / min from above with a tensile tester. The moisture permeability is JIS Z
According to 0208. The peeling strength is the adhesive strength when a piece of a moisture permeable waterproof film having a sample width of 1 cm and a woven fabric are sandwiched by chucks of a tensile tester and peeled by the tensile tester.

[0025]

[Table 1]

In Table 1, ◯ marks of smoothness are good, Δ marks are slightly defective, and X marks are defective (large irregularities). Tensile strength,
Tensile elongation, tear strength, and cut resistance indicate vertical direction x horizontal direction. The water resistance after washing is 40 ° C for 5 minutes in a home washing machine, and then dehydration and air drying for 1 minute. After repeating this cycle 3 times, the value tested by JIS L 1092 is shown.

As can be seen from Table 1, Examples 1, 2, and 3 have the same base cloth thickness and tensile strength as the corresponding Comparative Example 1,
Tear strength is about 20% or higher and cut resistance is 50%.
-100% higher and the effect of highly elastic yarn insertion is seen, which is very excellent. Further, as compared with Comparative Example 2, since the cloth is smooth and the moisture permeable water resistant film is less likely to be abraded by abrasion during washing, the water resistance is very high even after washing, and the adhesive strength between the woven fabric and the moisture permeable water resistant film is excellent. It is understood that there is.

[0028]

The present invention has the following effects. (1) Since the waterproof cloth according to the present invention has the high elastic thread inserted therein, the base cloth has high tear strength and is hard to break. In addition, the resistance to cuts is high, so even if it is caught or pierced by a sharp object, it will not easily tear. (2) Since the waterproof fabric is smooth and the intersections of the high elastic yarns are not particularly projected, the waterproof fabric has high water resistance even after washing. (3) Since the waterproof fabric has a small basis weight, is flexible and has excellent water resistance, it is suitable not only for raincoats and winter clothes but also for outdoor work.

Claims (3)

[Claims] 1. A waterproof fabric having a resin layer on one surface of a base fabric, wherein the base fabric comprises a yarn containing a low shrinkage organic yarn A and a high elastic yarn B, and the high elastic yarn B is the weight of the woven fabric. 10% of
The resin layer is woven intermittently in the vertical and / or horizontal directions as shown below, and the resin layer is smooth and highly elastic.
Waterproof fabric characterized by no slack. 2. The waterproof fabric according to claim 1, wherein the high elastic yarn B is made of an aromatic polyamide fiber. 3. A method for producing a mixed woven fabric comprising a low shrinkage organic yarn A and a yarn containing a high elasticity yarn B, wherein the difference in boiling water shrinkage between the A and B yarns is 5% or less, and Manufacture of a waterproof cloth characterized in that the elastic yarn B is intermittently woven in the lengthwise and / or widthwise directions so as to be 10% or less of the weight of the mixed woven fabric, calendered after dyeing, and a resin film is applied. Method.