TWM556085U - Composite cloth - Google Patents

Abstract

A composite cloth includes a fiber substrate, the fiber substrate has a first side surface and a second side surface on opposite sides, and the composite cloth further includes a fiber substrate bonded to the first side surface of the fiber substrate. A hydrophilic film, and a microporous film bonded to the second side of the fibrous substrate. The microporous film can provide waterproofness and breathability of the composite cloth, and the hydrophilic film can provide moisture diffusion characteristics of the composite cloth. Therefore, when the product made of the composite cloth is worn or carried, it has durability and comfort.

Description

Composite cloth

The present invention relates to a kind of cloth, in particular to a composite cloth having a waterproof membrane and a water-permeable membrane. The composite cloth is also referred to as a composite laminated cloth because it is composed of layers of different materials.

In the production of the early cloth products, they all had a single-layer structure. With the different requirements of users for their functions, various types of composite cloths with different functions have been developed in recent years. Thermoplastic polyurethane (TPU) has high moisture diffusion characteristics, and polytetrafluoroethylene (PTFE), which has a porous microstructure, has the advantages of waterproofness and moisture permeability, so the aforementioned materials are often used. On composite cloth.

However, the thermoplastic polyurethane film is a hydrophilic film. When a hydrophilic film is combined on the opposite side of the fiber substrate, although the composite cloth has moisture diffusion characteristics, it lacks excellent moisture permeability. Another known composite fabric is a PTFE film combined on the opposite side of the fiber substrate. Since the PTFE film is a microporous structure and does not have moisture diffusion characteristics, it is not a conventional composite fabric. , Can not simultaneously obtain excellent water resistance, moisture permeability and water diffusion ability. In addition, the films of the same material are respectively bonded on opposite sides of the fiber substrate, and since the foregoing films have the same properties, the composite fabric also lacks a function of regulating humidity.

Another known composite cloth includes a fiber substrate, a TPU film on one side of the fiber substrate, and a PTFE film attached to the TPU film, that is, the fiber substrate and the PTFE film. They are located on opposite sides of the TPU film, respectively. The advantage of this composite cloth is that it has both the moisture permeability function of the TPU film and the waterproof effect of the PTFE film. However, the coefficient of friction of the PTFE film is very low, and it is not easy to adhere to the TPU film with high moisture permeability, so the peel strength after the combination of the two is insufficient. In addition, the TPU film is moisture-permeable through a hydrophilic group, and self-swelling also occurs after moisture absorption, while the PTFE film is moisture-permeable through microporosity, and the moisture permeability methods of the two are different. When the TPU film swells due to moisture absorption, the peel strength between the TPU film and the PTFE film will be further reduced. That is, although the composite fabric directly bonded with the TPU film and the PTFE film has a function of waterproofing and moisture permeability, the bonding strength between the layered structures is not ideal.

The object of the present invention is to provide a composite cloth having water resistance, moisture permeability and moisture diffusion.

The novel composite cloth includes a fiber substrate, the fiber substrate has a first side and a second side located on opposite sides, and the composite cloth further includes a first side bonded to the fiber substrate A hydrophilic film, and a microporous film bonded to the second side of the fiber substrate.

The hydrophilic film and the microporous film may be formed on the first side and the second side of the fiber substrate by a resin coating method, or may be separately manufactured and then bonded to the fiber substrate. Bonding can be combined with a resin solution, or the fiber substrate can be dipped in the resin solution and then bonded to the hydrophilic film and the microporous film. The hydrophilic film and the microporous film can also be bonded to each other first. A layer of fibrous material is then bonded to the fibrous substrate.

The aforementioned fibrous material layer may be combined with the fibrous substrate, that is, the hydrophilic film and the microporous film are respectively located on the outside of the composite cloth, or the hydrophilic film and the microporous film and the fibrous substrate And the fiber material layer is located outside the composite cloth. In manufacturing, in addition to firstly combining the hydrophilic film and the microporous film with the fiber material layer, and then selecting one of them to be combined with the fiber substrate, the hydrophilic film and the The microporous film is first bonded to the fibrous substrate, and then a layer of fibrous material is bonded to the hydrophilic film and the microporous film outside of the fibrous substrate, respectively. With the rich changes of the composite fabric, the competitiveness of the product on the market can be improved.

The materials of the novel fiber base material and the fiber material layer are not particularly limited, and may be cloth materials made of common natural fibers or man-made fibers, and the form of the fiber base material and the fiber material layer is also not particularly limited. The limitation may be a woven fabric, a knitted fabric, or a non-woven fabric, and the materials and forms of the aforementioned fibrous substrate and fibrous material layer may be the same or different.

That is, the composite cloth provided by the new model can automatically adjust the humidity on both sides of the composite cloth under different actual and effective temperatures. Because the new composite cloth combines the advantages of hydrophilic films and microporous films, And it can realize the function of automatically adjusting the humidity on both sides. Therefore, the composite cloth can be used in many fields, such as making bags, clothes, or medical treatment pads. The composite cloth can also be used after the thermal reduction process.

In addition, the new type of composite cloth can increase the temperature range and humidity range, so even in severe cold weather or harsh environments with high humidity, it can achieve perfect moisture permeability and waterproof performance. Therefore, the scope of use of the composite cloth can be expanded.

It is further explained that the new type uses microporous film and hydrophilic film to improve the waterproofness, breathability and moisture diffusion of the composite cloth, that is, moisture can be absorbed by the hydrophilic film, and then diffused and convected to The fiber substrate is removed, but water droplets cannot wet the fiber substrate through the microporous film, and the vapor in the fiber substrate can pass through the microporous film and dissipate from the fiber substrate. Compared with the conventional composite cloth, the new type does have high water resistance, breathability and moisture diffusion.

Specifically, the new composite cloth not only has perfect moisture permeability, but also has good waterproof performance. In addition, the new composite cloth can also automatically adjust the humidity on both sides at different temperatures. Therefore, when the composite cloth When the cloth is made into clothes, the comfort during wearing can be improved, and when the composite cloth is made into a bag, it also has good waterproof and moisture control capabilities.

The beneficial effect of the present invention is that the hydrophilic film and the microporous film are combined through the fiber substrate, in addition to allowing the hydrophilic film and the microporous film to perform their respective functions to achieve the purpose of complementary functions , Which can also improve the bonding strength of the composite cloth.

Referring to FIGS. 1 and 2, a first embodiment of the new composite cloth 1 is suitable for making clothes, and can also be used as outdoor items such as bags, backpacks and the like. The composite cloth 1 includes a fiber substrate 11, a hydrophilic film 12 having a strong moisture absorption ability, and a microporous film 13. The material of the fiber base material 11 is not particularly limited, and may be a cloth made of natural fibers or man-made fibers, and the form of the fiber base material 11 is also not particularly limited. The fabric or non-woven fabric is preferably a heat-resistant non-woven fabric, and the fiber base material 11 has a first side surface 111 and a second side surface 112 located on opposite sides.

The hydrophilic film 12 is bonded to the first side 111 of the fibrous substrate 11 in a coating manner. A thermoplastic polyurethane film is preferred. The heat-resistant aging temperature is about 150 ° C and the low-temperature resistance can reach minus 30 ° C. This hydrophilic film 12 has a hydrophilic group, so it can absorb the moisture emitted by the human body, and then convey the moisture to the fiber substrate 11 by convection, and then it is discharged from the microporous film 13, that is, the hydrophilic film 12 has strong moisture absorption capacity. In addition, the hydrophilic film 12 has good adhesion to the fabric, so it can be firmly combined with the fiber substrate 11.

The microporous film 13 is also bonded to the second side surface 112 of the fiber substrate 11 in a coating manner. Preferably, the microporous film 13 is selected from the group consisting of polytetrafluoroethylene and polyethylene, and more preferably Polytetrafluoroethylene, which is heat-resistant to 260 ° C, is used, that is, the microporous film 13 made of polytetrafluoroethylene has several micropores with a pore size of 0.1 to 0.5 μm, and the size of the micropores is much smaller than water droplets. , But it is much larger than the diameter of water vapor (0.0004μm). Therefore, even under pressure, the effect of blocking water penetration can be achieved, and the moisture can be directly discharged near the human body, but the role of water molecules in surface tension It cannot pass under the water, so it has the effect of waterproof and moisture permeability.

In addition, the microporous film 13 made of polytetrafluoroethylene can have a moisture permeability of up to 15000g / m ² ˙ 24 hours or more. It is an excellent waterproof and moisture permeable material, and can prevent water vapor from condensing into liquid water. Reduce the possibility of water conducting heat. Although the microporous film 13 made of this material is densely covered with the micropores, the wind cannot pass directly due to the irregular microweb spider structure, so the fiber substrate 11 is combined. After that, it can effectively prevent the invasion of the gale. That is, the microporous film 13 made of polytetrafluoroethylene has the advantages of waterproof, breathable, windproof and warm, and also has the advantages of blocking germs, fine dust, and preventing infrared and ultraviolet rays from passing through.

In this embodiment, the composite cloth 1 passes through the fiber substrate 11 to combine the hydrophilic film 12 and the microporous film 13, except that the peeling derived from the direct bonding of the hydrophilic film 12 and the microporous film 13 can be improved. In addition to the problem of insufficient strength, the fiber base material 11 can also play a cushioning function, avoiding reducing the bonding strength of the composite fabric 1.

On the other hand, in the role of moisture permeability, the hydrophilic group of the hydrophilic film 12 can directly absorb the moisture of the adjacent human body and transfer it to the fiber substrate 11, because the moisture will be from the high-humidity side to the low-humidity Progressive diffusion on one side, so when the humidity on the side adjacent to the hydrophilic film 12 is high, the humidity will naturally and gradually pass through the fiber substrate 11 and finally to the composite fabric through the microporous film 13 The other side of 1 diffuses, thereby achieving the purpose of automatically adjusting the humidity on both sides of the composite cloth 1. Since the composite cloth 1 in this embodiment can gradually adjust the humidity on both sides, when the composite cloth 1 is made into a waterproof bag, the external and internal humidity of the waterproof bag can also be automatically adjusted, and The humidity process is gentle and gradual, so it can avoid large changes in humidity.

In addition, in this embodiment, the composite cloth 1 can also be reduced by heat treatment to achieve the purpose of repeated use. The heat treatment refers to reducing the moisture content of the composite cloth 1 by external force. Specific methods such as: using sunlight, using Clothes dryer or microwave dehumidification.

Referring to FIG. 3, the structure of a second embodiment of the novel composite cloth 1 is similar to that of the first embodiment, and also includes the fiber substrate 11, the hydrophilic film 12, and the microporous film 13. The first embodiment The hydrophilic film 12 and the microporous film 13 are combined with the fibrous substrate 11 by a coating method. The hydrophilic film 12 and the microporous film 13 of the second embodiment are separately manufactured into film sheets. Then, it is combined with the fiber base material 11.

The structure of a third embodiment of the novel composite cloth 1 is similar to that of the second embodiment, and also has the fiber substrate 11, the hydrophilic film 12, and the microporous film 13, the third embodiment and the second embodiment The difference between the embodiments is that the composite cloth 1 further includes two fiber material layers 14 for the hydrophilic film 12 and the micro-poly film 13 respectively. The form and material of the fiber material layer 14 are not particularly limited, and may be the same as or different from the fiber base material 11. The fiber material layer 14 is combined with the fiber base material 11.

The structure of a fourth embodiment of the novel composite cloth 1 is similar to that of the third embodiment, and also includes the fiber substrate 11, the hydrophilic film 12, the microporous film 13, and the fiber material layer 14. The difference between the fourth embodiment and the third embodiment is that the hydrophilic film 12 and the microporous film 13 are respectively bonded to the first side surface 111 and the second side surface 112 of the fibrous substrate 11, and the hydrophilic type The film 12 has a third side surface 121 away from the fiber substrate 11, and the microporous film 13 has a fourth side surface 131 away from the fiber substrate 11. The fiber material layer 14 and the hydrophilic film 12 are respectively The third side surface 121 and the fourth side surface 131 of the microporous film 13 are combined.

In summary, the novel composite fabric 1 can be used as a waterproof and moisture-permeable fabric, wherein the microporous film 13 can provide the waterproofness and vapor permeability of the composite fabric 1, and the hydrophilic film 12 can provide The composite cloth 1 has the ability of diffusing and convective moisture absorption, as well as the ability to remove moisture. Therefore, the composite cloth 1 can be made into various products, and the product can automatically adjust the humidity.

However, the above are only examples of the new model. When the scope of implementation of the new model cannot be limited by this, any simple equivalent changes and modifications made in accordance with the scope of the patent application of the new model and the content of the patent specification are still Within the scope of this new patent.

1‧‧‧ composite cloth
11‧‧‧ fiber substrate
111‧‧‧ the first side
112‧‧‧ second side
12‧‧‧ hydrophilic film
121‧‧‧ third side
13‧‧‧Microporous film
131‧‧‧ Fourth side
14‧‧‧fiber material layer

Other features and effects of the present invention will be clearly presented in the embodiment with reference to the drawings, in which: FIG. 1 is an incomplete side view of a first embodiment of the novel composite cloth; FIG. 2 is the first An incomplete cross-sectional enlarged view of an embodiment; FIG. 3 is an exploded perspective view of a second embodiment of the novel composite cloth; FIG. 4 is an exploded perspective view of a third embodiment of the novel composite cloth And FIG. 5 is an exploded perspective view of a fourth embodiment of the novel composite cloth.

1‧‧‧ composite cloth

11‧‧‧ fiber substrate

111‧‧‧ the first side

112‧‧‧ second side

12‧‧‧ hydrophilic film

13‧‧‧Microporous film

Claims (6)

A composite cloth includes: a fiber substrate having a first side and a second side on opposite sides; a hydrophilic film bonded to the first side of the fiber substrate; and a microporous type A film is bonded to the second side of the fiber substrate. The composite cloth according to claim 1, wherein the microporous film is selected from the group consisting of polytetrafluoroethylene and polyethylene. The composite cloth according to claim 1, wherein the microporous film is made of polytetrafluoroethylene and has a plurality of micropores having a pore size of 0.1 to 0.5 μm. The composite cloth according to any one of claim 1 to claim 3, wherein the hydrophilic film is a thermoplastic polyurethane film. The composite cloth according to claim 1, further comprising two fibrous material layers for the hydrophilic film and the microporous film to be disposed and combined with the fibrous substrate. The composite cloth according to claim 1, wherein the hydrophilic film has a third side away from the fiber substrate, the microporous film has a fourth side away from the fiber substrate, and the composite cloth further It includes two fiber material layers respectively bonded to the third side surface and the fourth side surface.