TWM479216U - Multi-layer composite material - Google Patents

Description

Multi-layer composite

The present invention relates to a multilayer composite material, and more particularly to a multilayer composite material comprising a base layer comprising a thermosetting resin matrix, a transparent flexible substrate, and a woven fiber.

Today's electronic product design trend emphasizes lightness and thinness, and it is moving toward portable products. In the past, the plastic case of injection molded electronic products, when considering the thickness of the plastic case less than 2mm, may be easily broken and damaged due to insufficient strength, so it is not suitable for thinning. Therefore, in recent years, other more suitable materials have been actively sought, for example, an aluminum-magnesium alloy or a woven fiber composite material having excellent mechanical properties and good appearance to prepare an outer casing of an electronic product.

The carbon fiber composite material used for preparing the outer casing is mainly prepared by impregnating the woven fiber with a thermosetting resin to form a prepreg, and then hot pressing the prepreg to form a woven fiber composite material having a woven texture, wherein the weaving The fibers may be, for example, carbon fibers or the like. However, during the hot pressing process, the uncured thermosetting resin may slide due to the presence of the uncured thermosetting resin, which may cause the texture of the finished product to be offset. Although it does not affect the structural toughness of the finished product, its appearance is not good, and the electronic product is not good. The shape and aesthetics of the impact are enormous.

Therefore, in order to solve the aforementioned problems and improve the quality of the woven fiber composite material, it is necessary to propose a multilayer composite material having excellent surface quality and higher yield.

Therefore, the object of the present invention is to provide a multilayer composite material having a good appearance.

The novel multilayer composite material comprises: a base layer comprising: a cured first thermosetting resin matrix, a transparent flexible sheet, and a first thermosetting resin matrix sandwiched between the curing and the transparent flexible The first woven fabric in the middle of the sheet is obtained by first fusion-bonding the transparent flexible sheet with the first woven fabric, and then bonding the cured first thermosetting resin matrix to the first woven fabric and penetrating the same The first woven fabric is in turn in contact with the transparent flexible sheet.

The utility model has the advantages that the multi-layer composite material has no problem of woven grain deviation except for maintaining good mechanical properties of the multilayer composite material, and has good appearance, and is suitable for being used as an outer casing of various electronic products.

1‧‧‧Basic layer

11‧‧‧First thermosetting resin matrix

12‧‧‧Transparent flexible sheet

13‧‧‧First woven fiber

131‧‧‧ first surface

132‧‧‧ second surface

2‧‧‧Intermediate

21‧‧‧Second elastic film

211‧‧‧Contact surface

22‧‧‧ Filling film

23‧‧‧Second thermosetting resin matrix

24‧‧‧Second woven fiber

3‧‧‧ thermoplastic layer

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a flow diagram illustrating a first preferred embodiment of the novel multilayer composite and a method of making the same; Figure 2 is a cross-sectional view showing a second preferred embodiment of the novel multilayer composite material; Figure 3 is a cross-sectional view showing a third preferred embodiment of the novel multilayer composite material; Figure 4 is a schematic flow chart showing the present invention A fourth preferred embodiment of a novel multilayer composite and a method of making same.

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

Referring to Figure 1, a first preferred embodiment of the novel multilayer composite comprises a base layer 1 comprising: a cured first thermosetting resin matrix 11, a transparent flexible sheet 12, and a sandwiched in the curing The first thermosetting resin matrix 11 and the first woven fabric 13 in the middle of the transparent flexible sheet 12. The multilayer composite material is prepared by first fusion-bonding the transparent flexible sheet 12 with the first woven fabric 13, and then bonding and curing the cured first thermosetting resin matrix 11 to the first woven fabric 13. The first woven fabric 13 is in turn in contact with the transparent flexible sheet 12. The fusion bonding may be carried out by a general method, and may be, for example but not limited to, various types of thermocompression bonding methods. Preferably, the transparent flexible sheet 12 has a thickness of 0.15 mm to 0.20 mm, and the first woven fabric 13 has a thickness of 0.25 mm.

When the multilayer composite material of the first preferred embodiment is applied to the outer casing of the electronic product, it is recommended that the transparent flexible sheet 12 be the outer surface, and the first thermosetting resin substrate 11 be the inner surface, that is, the first weaving can be made. The texture of the fibers 13 is seen through the transparent flexible sheet 12 and contributes to the lifting The aesthetics of the electronic product. Preferably, the first woven fabric is a woven fabric (via Weave or Fabric), so that the multilayer composite of the present invention can have both good mechanical properties and aesthetic effects.

Preferably, the transparent flexible sheet 12 has a melting point lower than the melting point of the first woven fiber 13, so that the transparent flexible sheet 12 and the first woven fiber 13 are not damaged or caused by fusion bonding. The first woven fabric 13 is deformed.

The transparent flexible sheet 12 is not particularly limited as long as it can be fusion-bonded to the first woven fibers 13. Preferably, the transparent flexible sheet 12 is formed of a first elastic material; more preferably, the first elastic material is selected from a thermoplastic elastomer having a Shore hardness of 90 A or more ( Thermoplastic Elastomer (TPE), a combination of elastomer and nylon (Nylon), or a polyether block amide. Among them, the thermoplastic elastomer includes a styrene-based thermoplastic elastomer, a polyolefin-based thermoplastic elastomer, a polyurethane-based thermoplastic elastomer, a polyester-based thermoplastic elastomer, and a polyamide-based thermoplastic elastomer.

The kind of the first woven fiber 13 is not particularly limited, and is preferably a reinforcing fiber. Reinforcing fibers such as: metal fibers such as aluminum, brass, and stainless steel; carbon fibers such as polyacrylonitrile and lanthanum; insulating fibers such as graphite fibers and glass; aromatic polyamides, polyesters, acrylics, nylons, polyethylenes, etc. Organic fibers; and inorganic fibers such as tantalum carbide and silicon nitride. More preferably, the first woven fabric 13 is a carbon fiber.

The kind of the first thermosetting resin matrix 11 may be, for example but not limited to, an epoxy resin and a phenol resin, wherein when the first thermosetting resin matrix 11 In the case of a phenolic resin, since the phenolic resin has a high fire resistance rating, the obtained multilayer composite material is particularly suitable for use as a building material or furniture. Preferably, the type of the first thermosetting resin matrix 11 is an epoxy resin.

See Figure 2. A second preferred embodiment of the novel multilayer composite material comprises a base layer 1 and an intermediate layer 2. Laminating the intermediate layer 2 on the curable first thermosetting resin substrate 11 of the base layer 1, the intermediate layer 2 comprising a second elastic film 21 formed of a second elastic material, the intermediate layer 2 being The curable first thermosetting resin matrix 11 is contacted; the intermediate layer 2 and the base layer 1 which are stacked are subjected to heat and pressure to cure, and the intermediate layer 2 is bonded to the first thermosetting resin matrix 11.

The description and variations of the second elastic material are the same as those of the first elastic material forming the transparent flexible sheet 12, and will not be described herein.

The thickness of the intermediate layer 2 is adjusted according to the subsequent use and needs to increase the strength or shock absorption effect. Preferably, the intermediate layer 2 has a thickness of from 0.8 mm to 2.5 mm; more preferably from 0.8 mm to 1.3 mm.

See Figure 3. A third preferred embodiment of the novel multilayer composite material comprises a base layer 1, an intermediate layer 2, and a thermoplastic material 3 which is formed on the second elastic film 21 of the intermediate layer 2.

The fabrication of the thermoplastic material layer 3 is as follows: in the injection molding process, when the thermoplastic material is ejected, the thermoplastic material has an elevated temperature, and the elevated temperature is sufficient to melt the contact surface 211 of the second elastic film 21, Therefore, in the process of injection molding, when the thermoplastic material is in contact with the contact surface 211, the thermoplastic material and the contact surface 211 are generated. Fusion bonding. It is to be noted that only the contact surface 211 is melted by the thermoplastic material in the injection molding process, and the shape of the second elastic film 21 remains intact and uniform in thickness. In addition, the thermoplastic material layer 3 may be formed by injection molding, and the thermoplastic material layer 3 may be bonded to the contact surface 211 by a conventional method such as adhesion through a viscose or laser light to make the thermoplastic material layer 3 Bonded to the second elastic film 21.

Preferably, the thickness of the second elastic film 21 is 0.15 mm or more. When the thermoplastic material layer 3 is thermoplastically molded on the contact surface 211 of the second elastic film 21, the second elastic film 21 is not heated. Shrink, or only a slight shrinkage occurs; more preferably, the thickness of the second elastic film 21 is 0.15 to 0.3 mm.

Preferably, the thermoplastic material layer 3 is at least one selected from the group consisting of nylon 6, nylon 66, thermoplastic polyurethane, polycarbonate (PC), acrylonitrile butadiene. Acrylonitrile Butadiene Styrene (ABS), a mixture of polycarbonate and acrylonitrile butadiene styrene, and a polyether guanamine block.

Preferably, the layer of thermoplastic material 3 is a patterned layer of thermoplastic material. The thermoplastic material layer 3 can be patterned, for example but not limited to, to form one or more functional components; when the multilayer composite material is applied to various electronic product housings, the functional components can facilitate assembly and complete adhesion.

See Figure 4. A fourth preferred embodiment of the novel multilayer composite material comprises a base layer 1 and an intermediate layer 2. Different from the second preferred embodiment The intermediate layer 2 further comprises a filling film 22, a cured second thermosetting resin matrix 23, and a second woven fiber 24.

A specific embodiment of the fourth preferred embodiment is that first, the first woven fiber 13 is overlapped with the transparent flexible sheet 12, and heat and pressure are applied to fuse the transparent flexible sheet 12 to the first The first surface 131 of the woven fiber 13 and the first woven fiber 13, the cured first thermosetting resin substrate 11, the filling film 22, the cured second thermosetting resin matrix 23, and the second woven fiber 24 are The second elastic film 21 is sequentially laminated and bonded to the heat and pressure. The fourth preferred embodiment can selectively provide a layer of thermoplastic material 3 according to the subsequent use and needs. In the same manner as described above, a thermoplastic material is injection molded on the second elastic film 21 of the intermediate layer 2, that is, The layer of thermoplastic material 3 is formed and will not be described again.

The function of the filling film 22 is to provide buffering or shock absorption, and the material thereof may be, for example, but not limited to, a thermoplastic elastomer or a polyether amide block, which may be preliminarily sandwiched and fixed to the cured first thermosetting resin during preparation. The matrix 11 and the cured second thermosetting resin matrix 23 are intermediate.

The description and variations of the second thermosetting resin matrix 23 are the same as those of the first thermosetting resin matrix 11, and will not be described herein. The description and variations of the second woven fabric 24 are the same as those of the first woven fabric 13, and will not be described herein.

In summary, the novel method for preparing a multilayer composite material is formed by sandwiching a first woven fiber 13 between a cured first thermosetting resin substrate 11 and a transparent flexible sheet 12 by applying heat and pressure. Got The multi-layer composite material has a good surface appearance, the texture of the woven fiber is not easily offset, and the multi-layer composite material retains excellent mechanical properties, and is suitable for use as an outer casing of an electronic product, furniture, building materials, and an automobile hood, fender or insurance. Rods, etc., can indeed achieve the purpose of this new type.

However, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, that is, the simple equivalent changes and modifications made in accordance with the scope of the present patent application and the contents of the patent specification, All remain within the scope of this new patent.

1‧‧‧Basic layer

11‧‧‧First thermosetting resin matrix

12‧‧‧Transparent flexible sheet

13‧‧‧First woven fiber

Claims (5)

A multilayer composite comprising: a base layer comprising: a cured first thermosetting resin matrix, a transparent flexible sheet, and a first thermosetting resin matrix sandwiched between the curing and the transparent flexible sheet The first woven fiber in the middle of the material is obtained by first fusion-bonding the transparent flexible sheet with the first woven fiber, and then bonding the cured first thermosetting resin matrix to the first woven fiber and penetrating the first The woven fibers are in turn in contact with the transparent flexible sheet. The multilayer composite material of claim 1, further comprising: an intermediate layer bonded to the cured first thermosetting resin matrix and comprising a second elastic film formed of a second elastic material; and a bonding to the intermediate layer a layer of thermoplastic material on the second elastic film. The multilayer composite of claim 2 wherein the thermoplastic layer is a patterned layer of thermoplastic material. The multilayer composite material of claim 2, wherein the intermediate layer further comprises a filling film, a cured second thermosetting resin matrix, and a second woven fiber, the first woven fiber, the cured first thermosetting resin The substrate, the filling film, the cured second thermosetting resin matrix, the second woven fiber and the second elastic film are sequentially laminated and bonded to each other by applying heat and pressure. The multilayer composite material according to claim 2, wherein the second elastic material is selected from the group consisting of a thermoplastic elastomer having a Shore hardness of 90 A or more, a combination of an elastomer and a nylon, or a polyether amide block.