TWI569987B - A method of forming a layer on a composite surface - Google Patents

Description

Method of forming a layer on a composite surface

The present invention relates to a method of manufacturing a composite material, and more particularly to a method of forming a layer on the surface of a composite material.

According to the characteristics of light weight, high mechanical strength and corrosion resistance, composite materials are widely used in various industrial products, such as shipbuilding, racket, notebook case, mobile phone case and bicycle frame, etc., and in order to enhance the composite material. The appearance of the composite material is usually formed by spraying a layer, and a layer of transparent paint is sprayed on the outside of the layer to protect the layer from damage.

However, since the composite material is composed of a woven fiber cloth impregnated resin, the surface of the composite material is covered with the woven holes due to the overlapping of the fiber bundles, so that the composite material must be replenished before spraying the layer. The method of soil leveling and background color painting can effectively spray the layer on the composite material, and in order to make the surface of the transparent paint smoother, the transparent paint must also be surface-polished with an abrasive, so that The overall process of composite materials is not only time-consuming and labor-intensive, but also very energy-intensive and environmentally friendly. Therefore, how to develop a method for directly forming the layer on the surface of the composite material without refining, bottoming, polishing and polishing It is necessary.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for forming a layer directly on the surface of a composite material without the need for soil leveling, undercoating, and polishing.

In order to achieve the above object, a method for forming a layer on a surface of a composite material provided by the present invention comprises a step of forming a layer, a step of forming a surface layer, and a step of completing a finished product, wherein the step of forming the layer forms a predetermined pattern on a substrate. Forming a layer on the substrate; and the step of forming the surface layer comprises disposing a polyurethane on the outer side of the substrate and covering at least the layer to form a transparent surface layer on the substrate; The finished product step is to bond the substrate to a composite material such that the layer is formed on the surface of the composite.

The method for forming a layer on the surface of the composite material provided by the present invention, through the step of forming the layer, the step of forming the surface layer, and the step of completing the finished product, the user only needs to form the layer on the substrate, and then cover the substrate with the transparent surface layer. Then, the substrate and the composite material are combined with each other to form the layer on the surface of the composite material, thereby not only effectively improving the conventional composite material process, but also requiring soil leveling and background color coating. The disadvantage of effective spraying of the layer, and because the transparent surface layer is composed of polyurethane, and can fill the unevenness on the substrate and form a smooth and flat surface, the user does not need to perform the transparent surface layer. Grinding and polishing, so that the present invention can achieve the effect of shortening the process and saving energy and reducing carbon compared with the conventional process.

Please refer to the first, second and third figures, which are flowcharts, perspective views and cross-sectional views of a preferred embodiment of the invention, which disclose a method for forming a layer on a composite surface, the method mainly The method comprises the steps of: forming a layer: forming a predetermined pattern on a substrate 10 such that a layer 20 is formed on the substrate 10, wherein the predetermined pattern is one of sublimation transfer or UV printing. The substrate 10 is directly molded on the substrate 10, and the substrate 10 is selected from the group consisting of a nonwoven fabric, an elastic cloth, a PE film, a PET film, and a rubber film.

Forming the surface layer step: mixing an NCO-containing isocyanate polymer with an OH-containing hydroxy compound into a liquid polyurethane, and pouring the polyurethane onto the substrate 10, and at least The layer 20 is covered to form a transparent surface layer 30 on the substrate 10. In this embodiment, the polyurethane is selected from the group consisting of thermoplastic polyurethane (TPU) and reactive thermosetting polyurethane. One of the esters (R-TPU), and the transparent skin 30 covers the entire substrate 10.

Finishing the finished product step: bonding the substrate 10 to a composite material 40, such that the layer 20 is formed on the surface of the composite material 40, wherein the substrate 10 is bonded to the composite material 40 by thermoforming. And the composite material 40 is composed of a woven fiber cloth impregnated resin selected from one of a glass fiber cloth, a carbon fiber cloth and a boron fiber cloth.

For a further understanding of the structural features of the present invention, the application of the technical means, and the intended effect, the manner of use of the present invention will be described. It is believed that the present invention may be further understood and understood as follows: As shown in the first, second and third figures, the user can directly form the layer 20 on the substrate 10 by means of sublimation transfer or UV printing, and then the transparent surface layer. 30 covers the substrate 10, and finally the substrate 10 is hot-pressed together with the composite material 40, so that the layer 20 can be formed on the surface of the composite material 40, thereby not only effectively improving the conventional composite The material process requires the disadvantages of the soil leveling and the base color coating to effectively spray the layer, and because the transparent surface layer 30 is composed of polyurethane, it can fill the unevenness on the substrate 10 and form a Smooth and flat surface, so the user does not need to polish and polish the transparent surface layer 30, so that the invention can shorten the process and save energy and reduce carbon compared with the conventional process. fruit.

Referring to FIG. 4, FIG. 5 and FIG. 6 again, it is a flow chart, a perspective view and a cross-sectional view of another preferred embodiment of the present invention. The method for forming a layer on the surface of the composite material and the foregoing preferred embodiment The difference is that, before the step of completing the finished product, the method further comprises a step of forming a protective layer on the outer side of the transparent surface layer 30, the protective film 50 is selected from the PE film. And one of the high temperature resistant release film can be used to protect the transparent surface layer 30 from hot press forming after the substrate 10 and the composite material 40 are hot pressed and then peeled off from the transparent surface layer 30. No pollution during the process.

It is worth mentioning that, since the transparent surface layer 30 is composed of polyurethane and has high temperature resistance, when the substrate 10 is subjected to hot press forming together with the composite material 40, it is applied to The transparent surface layer 30 ensures that the layer 20 is not damaged, as in the flat hot stamping process shown in FIG. 2 or in the tubular internal pressure expansion process as shown in FIG.

Further, the features of the present invention and the achievable expected efficacy thereof are as follows: the method for forming a layer on the surface of the composite material of the present invention, through the step of forming a layer, the step of forming a surface layer, and the step of completing the finished product, the user only needs to form the layer first. And coating the transparent surface layer on the substrate, and then bonding the substrate and the composite material to form the layer on the surface of the composite material, thereby not only effectively improving the conventional structure. The composite material process requires the advantages of soil leveling and undercoating to effectively spray the layer, and because the transparent surface layer is composed of polyurethane, it can fill the unevenness on the substrate and form a smooth The surface is flat, so the user does not need to polish and polish the transparent surface layer, so that the invention can achieve the effects of shortening the process and saving energy and reducing carbon compared with the conventional process.

In summary, the present invention has excellent advancement and practicability in similar products, and at the same time, the technical materials of such structures are frequently investigated at home and abroad, and the same structure is not found in the literature. The invention already has the invention patent requirements, and the application is filed according to law.

However, the above-mentioned ones are merely preferred embodiments of the present invention, and the equivalent structural changes of the present invention and the scope of the claims are intended to be included in the scope of the present invention.

10. . . Substrate

20. . . Layer

30. . . Transparent surface

40. . . Composite material

50. . . Protective film

The first figure is a flow chart of a preferred embodiment of the present invention.

The second drawing is a perspective view of a preferred embodiment of the present invention.

The third drawing is a cross-sectional view of a preferred embodiment of the invention.

The fourth figure is a flow chart of another preferred embodiment of the present invention.

Figure 5 is a perspective view of another preferred embodiment of the present invention.

Figure 6 is a cross-sectional view of another preferred embodiment of the present invention.

10. . . Substrate

20. . . Layer

30. . . Transparent surface

40. . . Composite material

Claims (10)

A method for forming a layer on a surface of a composite material, comprising the steps of: forming a layer: forming a predetermined pattern on a substrate to form a layer on the substrate; and forming a surface layer: a step of: forming an isocyanate containing NCO The acid salt polymer is mixed with an OH-containing hydroxy compound to form a liquid polyurethane, and the polyurethane is disposed on the outer side of the substrate, and at least covers the layer to form on the substrate. a transparent skin layer; a finished product step: bonding the substrate on which the layer is formed to a composite material, the composite material being composed of a woven fiber cloth impregnated resin, such that the layer is formed on the surface of the composite material. A method of forming a layer on a surface of a composite material according to claim 1, wherein the step of completing the finished product further comprises a step of forming a protective layer attached to the outer side of the transparent surface layer. There is a protective film. A method for forming a layer on a surface of a composite material according to claim 2, wherein the protective film is selected from the group consisting of a PE film and a high temperature resistant release film. A method of forming a layer on a surface of a composite material according to claim 1, wherein the transparent surface layer covers the entire substrate. A method of forming a layer on a surface of a composite material according to claim 1, wherein the composite material is composed of a woven fiber cloth impregnated resin. A method of forming a layer on a surface of a composite material according to claim 5, wherein the woven fabric is selected from the group consisting of a glass fiber cloth, a carbon fiber cloth, and a boron fiber cloth. A method of forming a layer on a surface of a composite material according to claim 1, wherein the substrate is selected from the group consisting of a nonwoven fabric, an elastic cloth, a PE film, a PET film, and a rubber film. A method of forming a layer on a surface of a composite material according to claim 1, wherein the predetermined pattern is directly formed on the substrate by one of sublimation transfer or UV printing. A method of forming a layer on a surface of a composite material according to claim 1, wherein the substrate is bonded to the composite by thermoforming. A method for forming a layer on a surface of a composite material according to claim 1, wherein the polyurethane is selected from the group consisting of thermoplastic polyurethane (TPU) and reactive thermosetting polyurethane (R). -TPU).