TW201946772A - Multi-layer composite fabric - Google Patents

Abstract

A multi-layer composite fabric has a functional member (10A, 10B, 10C) and at least one protecting member (20A, 20B). The functional member (10A, 10B, 10C) has two sides, a micro-porous membrane (11), a hydrophilic membrane (12), and a fabric material substrate (13). The fabric material substrate (13) is disposed between the micro-porous membrane (11) and the hydrophilic membrane (12). The at least one protecting member (20A, 20B) is selectively disposed on one of the two sides of the functional member (10A, 10B, 10C) for protecting the functional member (10A, 10B, 10C). Each protecting member (20A, 20B) has at least one filtering layer (21). The at least one filtering layer (21) is disposed on the functional member (10A, 10B, 10C) to filter the particulate matter and absorb oil and protect the functional member (10A, 10B, 10C).

Description

   Multilayer composite   

The invention relates to a multilayer composite material, in particular to a multilayer composite material for blocking suspended particles with good protection effect and good isolation effect.

In the production of the early cloth products, they were all single-layer structures. In accordance with the different functional requirements of users, various composite materials 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 materials.

TPU film and PTFE film are applied to functional composite materials to exert the effect of composite materials. The hydrophilic group of TPU film and the micropores in PTFE film can achieve the effect of composite materials. When these composite materials are made into clothing and worn on the human body, or when outdoor products such as sleeping bags are exposed to the air, the body's naturally secreted oil and fine particles in the air may slowly adhere and block the PTFE membrane On the micropores, thereby reducing the overall effect of the multilayer composite fabric.

In order to overcome the above disadvantages, the present invention provides a multilayer composite material that can alleviate or eliminate at least one of the disadvantages of the prior art. An object of the present invention is to provide a multilayer composite material capable of filtering particulate matter to maintain the effect of the multilayer composite material.

The multilayer composite material of the present invention includes a functional structure and at least one protection unit. The functional structure has a fiber substrate, and a hydrophilic film and a microporous film combined on the opposite side of the fiber substrate. At least one protection unit is selectively disposed on one side of the functional structure. Each protection unit includes at least one filter layer, and the at least one filter layer is disposed on the functional structure.

Preferably, the at least one filter layer is a material having a better filtering effect, such as a melt-blown nonwoven fabric, an electrostatic cotton cloth, and a pure cotton filter cloth, and a filter material having a special treatment may also be used when necessary.

Preferably, each protection unit can be added with at least one breathable protective layer according to the use requirements, and the at least one breathable protective layer is disposed on the at least one filter layer. In addition, the at least one breathable protective layer is preferably made of a fiber material with good structural strength and breathability, and specific examples may be selected from the group consisting of spunbond nonwoven fabric and nylon fabric.

Preferably, the microporous film is polytetrafluoroethylene (PTFE), and the PTFE membrane includes a plurality of micropores, and each micropore has a size between 0.1 μm and 0.5 μm. The hydrophilic film is a thermoplastic polyurethane (TPU).

Therefore, in the present invention, a microporous film and a hydrophilic film are used to improve the waterproofness, air permeability, and moisture diffusion of the multilayer composite material. At least one protection unit of the multilayer composite material utilizes at least one filter layer to filter particulate matter and absorb grease. Oils and fats in human sweat and particulate matter in the air may not adhere and may not directly block microporous and hydrophilic films. The functions of the microporous film and the hydrophilic film can be well maintained by at least one filter layer.

In addition, multilayer composites can be used to make a variety of products, such as bags, clothing or treatment pads. In addition, the multi-layer composite material can also be reduced by heat treatment to achieve the purpose of reuse. The heat treatment refers to reducing the moisture content of the multi-layer composite material by an external force, such as using sunlight, a dryer, Microwave dehumidification and so on. The object of the present invention is also to increase the application for widening the temperature range and widening the humidity range of the multilayer composite material. The multilayer composite material can also achieve good moisture permeability and waterproof performance in harsh environments such as severe cold weather or extremely humid environments.

In addition, at least one filter layer of the at least one protection unit has good air permeability, good filterability, good barrier properties, good thermal insulation and good oil absorption. Moisture can be absorbed by the hydrophilic film and then removed from the fiber substrate by diffusion and convection, but water droplets cannot wet the fiber substrate through the microporous film, and the vapor in the fiber substrate can pass through the fiber substrate. A microporous film is dissipated from the fibrous substrate. The multi-layer composite material combines the advantages of a microporous film, a hydrophilic film, and at least one filter layer to form a multi-layer composite material with good waterproof and humidity control capabilities.

The hydrophilic film of the present invention is preferably made of thermoplastic polyurethane (TPU) with high moisture diffusion characteristics, and the microporous film is preferably made of porous microstructures with excellent water resistance and moisture permeability. Polytetrafluoroethylene (PTFE). The hydrophilic film and the microporous film may be formed on the opposite side of the fibrous substrate by a coating method, or may be separately manufactured and then bonded to the fibrous substrate. The means of bonding are not particularly limited. The resin liquid can be used for bonding, or the fiber substrate can be dipped in the resin liquid and then overlapped with the hydrophilic film and the microporous film.

The beneficial effect of the present invention is that: using the protection unit to protect the functional structure, the microporous film can maintain long-term waterproofness and breathability, and at the same time, the hydrophilic film has a long-lasting moisture diffusion property. , Can make the multilayer composite material have long-lasting functional properties.

(10A, 10B, 10C) ‧‧‧ Functional Structure

11‧‧‧ microporous film

12‧‧‧ hydrophilic film

13‧‧‧ fiber substrate

14‧‧‧fiber material layer

(20A, 20B) ‧‧‧Protection unit

21‧‧‧Filter layer

22‧‧‧ breathable protective layer

111‧‧‧ the first side

121‧‧‧ second side

With reference to the drawings, other objects, advantages and novel features of the present invention will become more apparent from the following detailed description, in which: FIG. 1 is a side view of a first embodiment of the multilayer composite material of the present invention; FIG. 2 Is a side view of a second embodiment of the multilayer composite material of the present invention; FIG. 3 is a cross-sectional side view of the multilayer composite material of FIG. 1; FIG. 4 is an enlarged perspective exploded schematic view of the multilayer composite material of FIG. 1; 5 is a cross-sectional side view of the multilayer composite material of FIG. 2; and FIG. 6 is a cross-sectional side view of the functional structure of the third embodiment of the multilayer composite material of the present invention.

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

Referring to FIG. 1 and FIG. 2, in the first and second embodiments of the multilayer composite material of the present invention, in addition to being suitable for making clothes, it can also be made into outdoor products such as bags, backpacks, outdoor sleeping bags, etc. The application is not limited to the foregoing examples. The multilayer composite material includes a functional structure 10A, 10B and at least one protection unit 20A, 20B.

As shown in FIGS. 3 to 5, the functional structures 10A and 10B have two sides, a microporous film 11, a hydrophilic film 12, and a fiber substrate 13. The fiber substrate 13 is disposed between the microporous film 11 and the hydrophilic film 12. The material of the fiber base material 13 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 13 is also not particularly limited. Cloth or non-woven. Among them, natural fibers can be divided into plant fibers, animal fibers, and mineral fibers such as asbestos. Common plant fibers include cotton and hemp. Common animal fibers include wool, camel hair, silk, and so on. The types of man-made fibers are more diverse, and can be roughly divided into recycled fibers processed from natural raw materials, semi-synthetic fibers processed from natural cellulose, and synthetic fibers made of petrochemical materials. There are many types, so I won't give examples one by one. In this embodiment, a heat-resistant non-woven fabric is preferably used.

As shown in FIGS. 3 to 5, at least one protection unit 20A, 20B is located on one of the two sides of the functional structure 10A, 10B. Each protection unit 20A, 20B has at least one filter layer 21 and at least one breathable protection layer 22. At least one filter layer 21 is disposed on the functional structures 10A, 10B, and at least one breathable protective layer 22 is disposed on the at least one filter layer 21. Further, at least one filter layer 21 is indirectly disposed on the functional structures 10A and 10B. At least one filter layer 21 is made of a breathable material with high isolation. In this embodiment, a melt-blown nonwoven fabric with better filtering effect is used.

The fineness of at least one filter layer 21 is between 2 μm and 5 μm. The material of the breathable protective layer 22 is not particularly limited. In this embodiment, at least one breathable protective layer 22 is a spunbond non-woven fabric with better strength and breathability.

As shown in FIG. 3 and FIG. 4, at least one protection unit 20A includes two protection units 20A. The protection units 20A are respectively disposed on both sides of the functional structure 10A, and are in contact with the microporous film 11 and the hydrophilic film 12, respectively. Each of the two protection units 20A has a filter layer 21 and a breathable protective layer 22 between the filter layer 21 and the functional structure 10A. Of course, the breathable protective layer 22 can also be laminated at any position as required.

As shown in FIG. 5, the at least one protection unit 20B includes two protection units 20B. The two protection units 20B are respectively disposed on two sides of the functional structure 10B, and are respectively connected to the microporous film 11 and the hydrophilic film 12. A protective unit 20B includes two breathable protective layers 22 and a filter layer 21 located between the two breathable protective layers 22, and one of the two breathable protective layers 22 of each protective unit 20B is provided on the microporous film 11 and One of the hydrophilic films 12.

In addition, the number of the at least one filter layer 21 and the at least one breathable protective layer 22 can be adjusted according to use requirements, and can also be overlapped at any position as required, and the at least one filter layer 21 and the at least one breathable protective layer 22 The material can also be appropriately selected.

The microporous film 11 is bonded to the surface of the fibrous substrate 13 in a coating manner. Preferably, the microporous film 11 is selected from the group consisting of polytetrafluoroethylene and polyethylene. Polytetrafluoroethylene at 260 ° C, that is, the microporous film 11 made of polytetrafluoroethylene has several micropores with a pore diameter of 0.1 to 0.5 μm, and the size of the micropores is much smaller than that of 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 moisture can be directly discharged from the adjacent 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 11 made of polytetrafluoroethylene can have a moisture permeability of up to 15000g / m2˙24h or more. It is an excellent waterproof and moisture permeable material, and can prevent water vapor from condensing into liquid water, reducing It is possible for water to conduct heat. Although the microporous film 11 made of this material is densely covered with the micropores, the wind cannot pass directly due to the irregular spider web structure of the micropores. Can effectively prevent the invasion of strong winds. That is to say, the microporous film 11 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.

The hydrophilic film 12 is also bonded to the surface of the fibrous substrate 13 in a coating manner. A thermoplastic polyurethane film is preferably used. The heat-resistant aging temperature is 150 ° C and the low-temperature resistance can reach minus 30 ° C. This hydrophilic film 12 has hydrophilic groups, so it can absorb the moisture emitted by the human body, and then transfer the moisture to the fiber substrate 13 through diffusion and convection, and finally discharge it from the microporous film 11, that is, The hydrophilic film 12 has a strong ability to absorb moisture. In addition, the hydrophilic film 12 and the fabric have good lamination properties, so they can be firmly combined with the fiber substrate 13.

It is further explained that in this embodiment, the multilayer composite material is combined with the microporous film 11 and the hydrophilic film 12 through the fiber substrate 13, except that the microporous film 11 and the hydrophilic film 12 can be directly improved. In addition to the problem of insufficient peel strength derived from lamination, the fiber substrate 13 can also play a cushioning function, avoiding reducing the bonding strength of the multilayer composite material.

As shown in FIG. 6, the microporous film 11 includes a first side 111 that is far from the fiber substrate 13, and the hydrophilic film 12 includes a second side 121 that is far from the fiber substrate 13. The functional structure 10C has two A fibrous material layer 14 is disposed on the first side surface 111 and the second side surface 121 respectively. The two fibrous material layer 14 is preferably made of a fiber material with good structural strength and air permeability. It can be selected from the group consisting of spunbond non-woven fabrics and nylon fabrics. Spunbond non-woven fabrics are preferred. In addition, the two-fiber material layer 14 can provide a variety of multilayer composite material products through different processing methods.

The multilayer composite material can be used in waterproof bags. The outer surface of the waterproof bag can be covered by the microporous film 11. Water cannot penetrate into the waterproof bag through the microporous film 11. The inner surface of the waterproof bag can be covered by the hydrophilic film 12. The hydrophilic film 12 can absorb the moisture in the waterproof bag, and the moisture can be gradually transported out of the fibrous substrate 13 by diffusion and convection from the hydrophilic film 12, and then the water vapor caused by the moisture can be transported out of the waterproof bag by the microporous film 11. The waterproof bag can automatically adjust the humidity between the outer space of the waterproof bag and the inner space of the waterproof bag, and the change of moisture or humidity between the outer space of the waterproof bag and the inner space of the waterproof bag is reduced.

Multi-layer composite PTFE film can prevent water from entering the inner space of the waterproof bag. Multi-layer composite TPU film can help remove moisture from the inner space of the waterproof bag. The waterproof bag uses the advantages of the PTFE film and the advantages of the TPU film while maintaining water resistance. The dry, multi-layered composite material of the bag can automatically adjust the external and internal humidity of the waterproof bag, and it is gentle and gradual in the process of adjusting the humidity, so it can avoid a large change in humidity.

In addition, the at least one protection unit 20A, 20B and at least one filter layer 21 on the functional structures 10A, 10B, and 10C can filter particulate matter and prevent the particulate matter from attaching to the functional structures 10A, 10B, and 10C. In addition, at least one filter layer 21 of the at least one protection unit 20A, 20B can absorb oil and can prevent oil and fat from human sweat from adhering to the functional structures 10A, 10B, and 10C. The at least one filter layer 21 of the at least one protection unit 20A, 20B can prevent particulate matter and grease from reducing the effects of the functional structures 10A, 10B, and 10C. By using the protection units 20A and 20B to protect the functional structures 10A, 10B, and 10C, the microporous film 11 can maintain long-term waterproofness and breathability, and at the same time, the hydrophilic film 12 has long-lasting moisture diffusion characteristics. In this way, the multilayer composite material can have long-lasting functional properties.

In addition, multi-layer composite materials can be used on the treatment pad. The upper surface of the treatment pad can be covered with a hydrophilic film 12, and the lower surface of the treatment pad can be covered with a microporous film 11. When a person lies on the upper surface of the treatment pad, the human body The resulting water vapor can be absorbed and diffused by the TPU membrane, and then the vapor generated by the human body can be dissipated through the pores of the PTFE membrane and removed from the treatment pad.

The treatment pad can be kept dry and provide comfort to the human body through the TPU membrane and PTFE membrane. The treatment pad can automatically adjust the moisture between the human body and the outside space of the treatment pad. The TPU membrane of the treatment pad can absorb moisture and help the moisture from the treatment The upper surface of the pad diffuses and convects. The PTFE membrane of the treatment pad can remove moisture through the multiple pores of the PTFE membrane. The treatment pad utilizes the advantages of the TPU membrane and the PTFE membrane while keeping the treatment pad dry and maintaining human health.

Therefore, the microporous film 11 provides waterproofness and breathability for the multilayer composite material, and the hydrophilic film 12 provides moisture diffusion ability. The at least one filter layer 21 has good air permeability, good filterability, good barrier properties, good heat insulation properties, and good oil absorption. The at least one breathable protective layer 22 provides the multilayer composite material with good air permeability, good strength, good abrasion resistance, and good moisture absorption ability.

The at least one protection unit 20A, 20B of the multilayer composite material uses at least one filter layer 21 to filter particulate matter and absorb oil, and grease from human sweat and particulate matter in the air may not adhere to the microporous film 11 and hydrophilic The membrane 12 may not directly block the microporous membrane 11 and the hydrophilic membrane 12. The microporous membrane 11 and the hydrophilic membrane 12 can be maintained through the at least one filter layer 21 of the at least one protection unit 20A, 20B. Effect, the service life of multilayer composite materials can be effectively extended.

In addition, the protection units 20A, 20B can provide good wind resistance, good water pressure resistance, good chemical resistance or good virus resistance. The multilayer composite material combines a microporous film 11, a hydrophilic film 12 and at least The advantages of one protection unit 20A, 20B, therefore, multilayer composites are versatile.

In addition, the moisture content in the multilayer composite can be reduced by heat treatment for reuse.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, any simple equivalent changes and modifications made according to the scope of the patent application and the contents of the patent specification of the present invention are still Within the scope of the invention patent.

Claims (8)

    A multilayer composite material, characterized in that the multilayer composite material comprises: a functional structure (10A, 10B, 10C), including a fiber base material 13 and a microporous type bonded to the opposite side of the fiber base material 13 Film 11, a hydrophilic film 12, and at least one protection unit (20A, 20B), the at least one protection unit (20A, 20B) is selectively disposed on both sides of the functional structure (10A, 10B, 10C) One of them, and each protection unit (20A, 20B) has at least one filter layer (21), and the at least one filter layer (21) is disposed on the functional structure (10A, 10B, 10C).         The multilayer composite material according to claim 1, wherein the at least one filter layer (21) is selected from the group consisting of a meltblown nonwoven fabric, an electrostatic cotton sheet, and a pure cotton filter fabric.         The multilayer composite material according to claim 1 or 2, characterized in that each protection unit (20A, 20B) can be added with at least one breathable protection layer (22) according to the needs of use, and the at least one breathable protection A layer (22) is provided on the at least one filter layer (21).         The multilayer composite material according to claim 3, wherein the at least one breathable protective layer (22) is selected from the group consisting of a spunbond nonwoven fabric and a nylon fabric.         The multilayer composite material according to any one of claims 1 to 4, wherein the microporous film (11) is a polytetrafluoroethylene (PTFE) film or a polyethylene (PE) film.         The multilayer composite material according to any one of claims 1 to 4, wherein the microporous film (11) is a PTFE membrane, and the PTFE membrane has micropores, and the size of the micropores is between Between 0.1 μm and 0.5 μm.         The multilayer composite material according to any one of claims 1 to 6, wherein the hydrophilic film (12) is a thermoplastic polyurethane (TPU) film.         The multilayer composite material according to any one of claims 1 to 7, wherein the microporous film (11) includes a first side surface (111) away from the fibrous substrate (13), and the hydrophilic Type film (12) includes a second side surface (121) far from the fiber substrate (13), the functional structure (10C) has two fiber material layers (14), and the two fiber material layers (14) Respectively disposed on the first side surface (111) and the second side surface (121).