TW202229690A - Breathable waterproof composite cloth capable of providing good waterproof property and maintaining good breathability - Google Patents

Abstract

A breathable waterproof composite cloth includes a cloth sheet and a waterproof plastic film. The cloth sheet includes a first surface and a second surface, and defines a plurality of micropores. The plastic film is bonded to the first surface of the cloth sheet and forms a plurality of hollow flanges. The plastic film includes an inner surface and an outer surface. The inner surface is in contact with the first surface of the cloth sheet. Each of the hollow flanges includes a connecting part and a main body part. The connecting part is located in the micropore and connects the first surface and the second surface of the cloth sheet. The main body part is connected to the connecting part and extends radially from the second surface of the cloth sheet toward the first surface. The main body part defines a passage which extends through the inner surface and the outer surface to make the plastic film breathable. The breathable waterproof composite cloth of the present invention can provide good waterproof property and maintain good breathability.

Description

Breathable waterproof composite fabric

The present invention relates to a breathable and waterproof composite cloth, in particular to a breathable and waterproof composite cloth comprising a cloth sheet and a plastic film with hollow protrusions.

The conventional Gore-tex® breathable waterproof cloth for outdoor clothing includes an outer cover, an inner lining and a sponge-like porous membrane sandwiched between two protective layers and is breathable and waterproof. This type of sponge porous membrane is made from a polymer such as Teflon®, polyvinylidene fluoride (PVDF) or polyurethane (PU) and is formed by the methods disclosed in US Pat. Nos. 3,953,566 and 4,187,390 holes. In order to allow water vapor transpiration and prevent the passage of water, the pores formed in this type of sponge porous membrane have a pore size level of less than 1 μm. The thickness of such sponge porous membranes ranges from 50 μm to several hundreds of μm, and the manufacturing cost of such sponge porous membranes is quite high.

Therefore, the purpose of the present invention is to provide a breathable waterproof composite fabric that can overcome the above-mentioned shortcomings of the prior art.

Therefore, the breathable waterproof composite cloth of the present invention includes a cloth sheet and a waterproof plastic film. The cloth sheet includes two opposite first and second surfaces, and the cloth sheet defines a plurality of micropores extending through the first and second surfaces. The plastic film is bonded with the first surface of the cloth sheet and forms a plurality of hollow flanges. The plastic film includes an inner surface and an outer surface, and the inner surface is in contact with the first surface of the cloth sheet. Each hollow flange includes a connecting portion and a main portion. The connecting portion is located in the micro-hole and connects the first surface and the second surface of the cloth sheet. The main body portion is connected to the connecting portion and extends radially from the second surface of the cloth sheet toward the first surface, the main body portion defines a channel, the channel extends through the inner surface and the outer surface, so that the The plastic film is breathable.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are designated by the same reference numerals.

The present invention will be further described with respect to the following examples, but it should be understood that these examples are only used for illustration and should not be construed as a limitation of the implementation of the present invention.

Referring to FIG. 1 and FIG. 2 , the first embodiment of the breathable waterproof composite cloth of the present invention includes a cloth sheet 1 and a waterproof plastic film 2 . The cloth sheet 1 includes two opposite first surfaces 11 and second surfaces 12 , and the cloth sheet 1 defines a plurality of micropores 13 extending through the first surface 11 and the second surface 12 . The plastic film 2 is bonded to the first surface 11 of the cloth sheet 1 to form a plurality of hollow flanges 21 .

The plastic film 2 includes an inner surface 22 and an outer surface 23 , and the inner surface 22 is in contact with the first surface 11 of the cloth sheet 1 . Each hollow flange 21 includes a connecting portion 211 , a main portion 212 and a protruding portion 214 . The connecting portion 211 is located in the micro-hole 13 and connects the first surface 11 and the second surface 12 of the cloth sheet 1 . The main body portion 212 is connected to the connecting portion 211 and extends radially from the second surface 12 of the cloth sheet 1 toward the first surface 11 , the main body portion 212 defines a channel 213 , and the channel 213 extends through the inner surface 22 and the outer surface 23 to allow water vapor to pass through and prevent water droplets from passing through, thereby making the plastic film 2 breathable. The protruding portion 214 is connected to the main body portion 212 and away from the connecting portion 211 , and defines a through hole 215 communicating with the channel 213 . The minimum diameter of the through hole 215 is smaller than the minimum diameter of the channel 213 .

In the first embodiment, the protruding portion 214 extends from the main body portion 212 in a direction away from the second surface 12 of the cloth sheet 1 , and the through hole 215 is located outside the channel 213 .

The plastic film 2 is made of a thermoplastic material. The thermoplastic material is preferably selected from polyolefins, polyesters or thermoplastic elastomers. Optionally, the plastic film 2 is made of thermoplastic polyurethane elastomer.

The cloth sheet 1 is a woven cloth or a non-woven cloth. In the first embodiment, the fabric 1 includes a plurality of warp yarns 14 and a plurality of weft yarns 15 interwoven with the warp yarns 14 to define the micro-holes 13 .

Preferably, the minimum diameter range of the channel 213 is less than 10 μm and greater than 0.2 μm, more preferably, the minimum diameter range of the channel 213 is less than 5 μm and greater than 0.5 μm, so as to obtain good waterproofness and air permeability.

Preferably, the diameter of the micro-holes 13 ranges from 20 μm to 200 μm, and the thickness of the plastic film 2 ranges from 10 μm to 70 μm.

Referring to FIG. 3 , the first embodiment can be manufactured by a method comprising the following steps: adhering the first surface 11 of a cloth sheet 1 to the inner surface 22 of a plastic film 2 ; making the plastic film 2 together with the cloth sheet 1 The second surface 12 of the cloth sheet 1 is placed on a first mesh mold (not shown); the plastic film 2 on the cloth sheet 1 is heated and softened; a first air extraction device (not shown) is used to penetrate The vacuum punching technique sucks the softened plastic film 2 from the cloth sheet 1 to the direction away from the plastic film 2, and cools the plastic film 2 on the cloth sheet 1 before stopping the suction; then, the plastic film 2. Put the outer surface 23 of the plastic film 2 on a second mesh mold (not shown) together with the cloth sheet 1; reheat and soften the plastic film 2 on the cloth sheet 1; use a second air extraction A device (not shown) sucks the softened plastic film 2 from the plastic film 2 in a direction away from the cloth sheet 1 to form the hollow flanges 21 on the plastic film 2; The plastic film 2 is cooled and released from the second mesh mold, thereby forming the breathable waterproof composite cloth. Wherein, the mesh size of the second mesh mold is not larger than the mesh size of the first mesh mold, and the first air extraction device and the second air extraction device may be the same or different. In the first embodiment, the plastic film 2 is cooled first, and then the suction is stopped and released from the second mesh mold, thereby forming the breathable waterproof composite fabric of the first embodiment.

The method of the present invention is beneficial to easily adjust the minimum diameter of the channel 213 in the plastic film 2 by adjusting the thickness of the plastic film 2 . In addition, the length of the hollow flanges 21 can be adjusted by adjusting the mesh diameter of the mesh mold, and the density of the hollow flanges 21 can be adjusted by adjusting the mesh number of the mesh mold. Basically, under the condition that the minimum diameter of the hollow flanges 21 is constant, the higher the density of the hollow flanges 21 , the higher the air permeability of the plastic film 2 .

Referring to FIGS. 4 and 5 , the second embodiment of the breathable and waterproof composite fabric of the present invention is similar to the first embodiment, except that in the second embodiment, the protruding portion 214 is directed from the main body portion 212 toward the The direction of the second surface 12 of the cloth sheet 1 extends, and the through hole 215 is located in the channel 213 . In the second embodiment, the suction is stopped first, and then the plastic film 2 is cooled and released from the second mesh mold, thereby forming the breathable waterproof composite fabric of the second embodiment.

Referring to FIG. 6 , the third embodiment of the breathable and waterproof composite fabric of the present invention is similar to the second embodiment, the difference lies in the size of the yarns constituting the second surface 12 of the cloth sheet 1 in the third embodiment Different from the size of the yarns constituting the first surface 11 of the cloth sheet 1, in other words, in the third embodiment, the cloth sheet 1 is made of thick yarns and fine yarns blended to make the first surface 11 and the structure of the second surface 12 are inconsistent, so that the body portion 212 is formed with a shoulder ring 216 away from the protruding portion 214 to further reduce the size of the channel 213 . In addition, the position and shape of the shoulder loop 216 can be adjusted by changing the blended yarns.

To sum up, the breathable and waterproof composite cloth of the present invention can prevent the passage of water droplets by the waterproof plastic film 2 , provide good waterproofness by the hollow flange 21 formed by the plastic film 2 , and can use the cloth sheet 1 to prevent water droplets from passing through. The micro-holes 13, the channels 213 and the through-holes 215 of the plastic film 2 maintain good air permeability, so the purpose of the present invention can indeed be achieved.

However, the above are only examples of the present invention, and should not limit the scope of the present invention. Any simple equivalent changes and modifications made according to the scope of the application for patent of the present invention and the content of the patent specification are still within the scope of the present invention. within the scope of the invention patent.

1: cloth piece 11: The first surface 12: Second surface 13: Micropores 14: Warp 15: Weft yarn 2: plastic film 21: Hollow flange 211: Connector 212: main body 213: Channel 214: Protrusion 215: Through hole 216: Shoulder Rings 22: inner surface 23: Outer surface

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: [Fig. 1] is a perspective exploded schematic diagram of the first embodiment of the breathable waterproof composite fabric of the present invention; [Fig. 2] is an incomplete cross-sectional schematic diagram of the first embodiment; [ FIG. 3 ] is a manufacturing flow chart of the first embodiment; [Fig. 4] is a perspective exploded schematic view of the second embodiment of the breathable waterproof composite fabric of the present invention; [FIG. 5] is a fragmentary schematic cross-sectional view of the second embodiment; and [ Fig. 6 ] is an incomplete cross-sectional schematic view of the third embodiment of the breathable waterproof composite fabric of the present invention.

1: cloth piece

11: The first surface

12: Second surface

13: Micropores

2: plastic film

21: Hollow flange

211: Connector

212: main body

213: Channel

214: Protrusion

215: Through hole

22: inner surface

23: Outer surface

Claims (10)

A breathable waterproof composite fabric comprising: a cloth sheet including two opposing first and second surfaces, the cloth sheet defining a plurality of pores extending through the first and second surfaces; and A waterproof plastic film is bonded with the first surface of the cloth sheet and forms a plurality of hollow flanges, the plastic film includes an inner surface and an outer surface, and the inner surface is in contact with the first surface of the cloth sheet; Wherein, each hollow flange includes a connecting part and a main body, the connecting part is located in the micro-hole and is connected to the first surface and the second surface of the cloth sheet, the main part is connected to the connecting part and is separated from the cloth The second surface of the sheet extends radially toward the first surface, the main body defines a channel, the channel extends through the inner surface and the outer surface, so that the plastic film has air permeability. The breathable waterproof composite fabric according to claim 1, wherein each hollow flange further includes a protruding portion connected to the main body portion and away from the connecting portion, and the protruding portion defines a through hole communicating with the channel, The smallest diameter of the through hole is smaller than the smallest diameter of the channel. The breathable waterproof composite cloth according to claim 2, wherein the protruding portion extends from the main body portion in a direction away from the second surface of the cloth sheet, and the through hole is located outside the channel. The breathable waterproof composite cloth according to claim 2, wherein the protruding portion extends from the main body portion toward the second surface of the cloth sheet, and the through hole is located in the channel. The breathable waterproof composite fabric according to claim 1, wherein the plastic film is made of a thermoplastic material. The breathable waterproof composite fabric according to claim 5, wherein the thermoplastic material is selected from polyolefin, polyester or thermoplastic elastomer. The breathable waterproof composite fabric according to claim 1, wherein the fabric sheet is a woven fabric or a non-woven fabric. The breathable waterproof composite fabric according to claim 1, wherein the cloth sheet comprises a plurality of warp yarns and a plurality of weft yarns interwoven with the warp yarns to define the micropores. The breathable waterproof composite fabric according to claim 1, wherein the minimum diameter of the channel ranges from less than 10 μm to more than 0.2 μm. The breathable waterproof composite fabric according to claim 1, wherein the minimum diameter of the channel ranges from less than 5 μm to greater than 0.5 μm.

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