JPH0659037U - Real wood products - Google Patents

Abstract

(57) [Summary] [Structure] A wooden board 16 for designing is laid on a base material 12 with a nonwoven fabric 14 interposed therebetween, and a resin sheet material 20 made of a thermoplastic resin is laid on it to integrally bond them. The coating layer 18 was formed on the surface of the resin sheet material 20. [Effect] By arranging a resin sheet material between the coating layer and the designing wooden board to improve waterproofness, the designing wooden board is prevented from absorbing moisture and the coating layer is prevented from being thinned. Further, since the coating layer is advantageously thinned, the coating work can be reduced and the cost can be reduced. Furthermore, by eliminating the conventional undercoat layer, the problem of deterioration of product properties due to insufficient drying of the undercoat layer is solved.

Description

[Detailed description of the device]

[0001]

【Technical field】

 The present invention relates to a genuine wood product used for automobile interior parts and the like, and more particularly to ensuring the quality of the genuine wood product and reducing the cost.

[0002]

[Background technology]

 In recent years, automobiles have become more sophisticated, and for interior parts such as armrest bases, clusters, and register bezels, it is preferable to use genuine wood rather than simply transferring wood grain to synthetic resin. It is rarely used. In terms of workability, availability of wood used as a design panel, and economical efficiency, in practice, a laminated structure in which a design wooden board is pasted on the surface of a base material made of synthetic resin or the like is used. The parts are used.

[0003] Specifically, for example, a laminated wood product shown in FIG. 1 is known. Therein, 2 is a base material made of a synthetic resin such as ABS resin, and a thin design wood board 6 having a thickness of about 0.3 mm is generally provided on the base material 2 via a nonwoven fabric 4. They are piled up and pressure-bonded integrally by a method such as a vacuum laminating method. The surface of the design wooden board 6 is usually subjected to a coating treatment to form an undercoat layer 10 (thickness: 15 μm to 25 μm) and a coating layer 8 (thickness: 100 to 800 μm). Has been. The coating layer 8 is formed of a polyester-based paint or the like, and the thickness of the coating layer 8 is increased to give the wood product a color tone and a feeling of depth.

The undercoat layer 10 is provided for the purpose of improving waterproofness in order to prevent moisture absorption of the design wooden board 6 because the coating layer 8 has water permeability. It also serves as a primer between the wood board 6 and the coating layer 8. The undercoat layer 10 is usually formed of a two-component curing type polyurethane paint or the like.

However, in the actual wood product having such a structure, since the waterproof property of the undercoat layer 10 is not perfect, a phenomenon in which the design wood board 6 expands due to the inclusion of water gradually occurs, which causes the undercoat layer. As a result of the layers 10 and the coating layer 8 being pushed up, the coating layer 8 becomes thin, and the coating surface has a problem of becoming silky. In order to prevent such a phenomenon, it may be possible to increase the thickness of the coating layer 8 and the undercoat layer 10. However, the coating process will take more time and the material cost will increase. Then, there is a drawback that the cost is increased.

Further, since a two-component curing type polyurethane paint is used for the undercoat layer 10, forced drying and normal temperature drying are carried out, but the undercoat layer 10 is not sufficiently dried. Then, even if the coating layer 8 is cured, there is a problem that the strength of the product is insufficient or the appearance is deteriorated.

[0007]

[Solution]

 The present invention has been made in view of such circumstances, and the problem to be solved is to enhance the waterproof property of the actual wood product and to prevent the moisture absorption and expansion of the design wood board from causing a coating layer. To prevent thinning of the undercoat and to prevent deterioration of physical properties of the product due to insufficient drying of the undercoat layer.

[0008]

[Solution]

 Then, in order to solve such a problem, in the present invention, a design wood board is stacked on a base material, and a resin sheet material made of a thermoplastic resin is further stacked on the design wood board. The present invention has as its gist a wood product, which has a laminated structure in which are integrally bonded and a coating layer is formed on the surface of the resin sheet material.

[0009]

[Action / effect]

 In short, in the wood product according to the present invention, the conventional undercoat layer is eliminated, and the resin sheet material made of the thermoplastic resin is arranged between the design wood board and the coating layer. As a result, in the present wood product of the present invention, the resin sheet material ensures complete waterproofness, and the design wood board is prevented from absorbing moisture and swelling. Can be prevented. In addition, since the resin sheet material is highly waterproof, the coating layer can be made thinner than before, so the work of the painting process can be shortened and reduced, and cost reduction can be achieved advantageously. it can. Furthermore, even if the coating layer is thinned, the resin sheet material is thicker (about 80 μm) than the conventional undercoat layer (15 to 25 μm), so the total thickness of the coating layer and the resin sheet material is sufficient. It has a characteristic that the thickness is obtained and the color tone and depth of the grain are not lost. By eliminating the undercoat layer, the problem of deterioration of product properties due to insufficient drying of the undercoat layer can be fundamentally solved.

[0010]

【Example】

 Hereinafter, in order to clarify the present invention more specifically, representative embodiments of the present invention will be described in detail with reference to the drawings.

First, FIG. 2 shows an example of a laminated structure of a real wood product according to the present invention. Here, 12 is a base material similar to the conventional one, and is usually formed of a synthetic resin such as ABS resin in a thickness (usually about 2 to 3 mm) to obtain a desired strength. . A design wooden board 16 is laid on the base material 12 via a nonwoven fabric 14 and integrally bonded.

There are various types of design wood boards 16 such as wood boards in which the grain directions are aligned, wood boards in which the grain directions are intricate, and the like, and are appropriately selected according to the application and preference. However, a wood board having a thickness of about 0.3 mm is generally used. The non-woven fabric 14 is provided to enhance the adhesiveness between the base material 12 and the design wooden board 16, and is generally made of nylon-based or olefin-based chemical fiber and preferably has a thickness of about 20 μm. Used. Then, the non-woven fabric 14 is usually used by being integrally bonded to a required surface of the design wooden board 16 with an adhesive. However, the nonwoven fabric 14 is not an essential component in the present invention.

The resin sheet material 20 made of a thermoplastic resin and having a thickness of about 80 μm is superposed and integrally joined on the design wooden board 16, which makes it possible to obtain excellent properties. Water resistance is obtained, and moisture absorption and expansion of the design wooden board 16 can be effectively prevented.

Various thermoplastic resins are used as the material of the resin sheet material 20, but transparent materials such as vinyl chloride resin (PVC) and acrylic resin are preferably used, and among them, a PVC sheet is used. Wood is suitable. Since the resin sheet material 20 is made of a thermoplastic resin, it can be joined to the design wooden board 16 very easily by hot press molding or the like, and is used as an integral composite sheet material. It is possible.

Specifically, for example, a resin sheet material made of PVC in which a plasticizer is blended in a ratio of about 5 to 20 parts by weight per 100 parts by weight of a resin in a wooden board for design 16 laminated with the above-mentioned nonwoven fabric 14 20 are piled up, placed in a press mold heated to 90 to 160 ° C., pressed for 3 minutes under heating, and then pressed for 3 minutes while cooling the mold, whereby a non-woven fabric 14-design wood board 16- An integrated composite sheet material 22 having a laminated structure of the resin sheet material 20 can be obtained.

The composite sheet material 22 can be joined to the base material 12 by various known methods such as a vacuum laminating method and a vacuum pressing method. For example, the vacuum pressing method can be carried out using an apparatus as shown in FIGS. 3 and 4. In these drawings, 24 is an upper mold and 34 is a lower mold. A compressed air device (not shown) is connected to the upper mold 24 through a through hole 26, and the silicone rubber 30 is supplied by supplying air to the pressurizing chamber 28. (Thickness: 2 to 3 mm) can be deformed to the side of the lower mold 34 and pressure-bonded to the molded product placed on the lower mold 34. Further, a heater 32 is provided in the pressurizing chamber 28 so that the silicon rubber 30 can be heated. On the other hand, a suction device (not shown) is connected to the lower mold 34 through a through hole 36 so that the molding space formed by the silicone rubber 30 covering the molded product can be set to a vacuum state.

Then, using such an apparatus, first, as shown in FIG. 3, the base material 12 having the surface side (the upper mold 24 side) coated with the adhesive in advance is set on the lower mold 34. Then, the composite sheet material 22 (nonwoven fabric 14-wood board 16 for design-resin sheet material 20) is placed thereon. Next, as shown in FIG. 4, the upper mold 24 is brought into close contact with the lower mold 34, air is supplied to the upper mold 24, and the lower mold 34 is evacuated to a temperature of 80 to 90 ° C. by the heater 32. The silicon rubber 30 heated to the above is pressure-bonded to the molded product (12, 22), and the composite sheet material 22 is pressure-bonded along the base material 12 to complete the adhesion. After that, the mold is opened, the molded product is taken out, and trimming is performed.

As is apparent from FIG. 2, a coating layer 18 is further formed on the surface of the resin sheet material 20, and thus the present wood product has a base material 12-nonwoven fabric 14-design. The wood board 16-resin sheet material 20-coating layer 18 has a laminated structure.

It should be noted that the coating layer 18 is formed by using various known techniques such as electrostatic coating and manual spraying using a spray gun, using the same polyester-based coating as in the conventional case. Due to the excellent waterproofness of the resin sheet material 20, the coating layer 18 can be formed to be much thinner than before. Even if the coating layer 18 is thin due to the presence of the resin sheet material 20, the total thickness of the resin sheet material 20 + the coating layer 18 is the same as the total thickness of the undercoat layer + the coating layer in the conventional wood product. Since it is about the same level, it is possible to obtain the same color tone and depth as the conventional wood grain. Therefore, the coating film layer 18 is usually formed with a thin thickness of about 30 to 50 μm, and the work is completed by polishing the surface with sandpaper or the like after the coating process.

Therefore, in the actual wood product having such a structure, moisture absorption of the design wood board 16 can be prevented, the thinning of the coating layer 18 can be effectively prevented, and the coating wood layer can be coated more than before. Since the film layer 18 can be thinned, the work of the coating process can be shortened and reduced, and cost reduction can be achieved advantageously. Further, even if the coating layer is thinned, a sufficient film thickness can be obtained in combination with the resin sheet material, so that the color tone and the feeling of depth of the grain are not lost. By eliminating the undercoat layer, the problem of deterioration of the physical properties of the product due to insufficient drying of the undercoat layer could be fundamentally solved.

The representative embodiments of the present invention have been described above in detail, but it goes without saying that the present invention is not subject to any restrictions due to the description of such embodiments. By the way. Further, in addition to the above-described embodiments, the present invention may be modified, modified, improved, and the like without departing from the spirit of the present invention. Should be understood.

[Brief description of drawings]

FIG. 1 is an explanatory cross-sectional view showing an example of a conventional laminated structure of a real wood product.

FIG. 2 is a cross-sectional explanatory view showing an example of a laminated structure of a wood product according to the present invention.

FIG. 3 is a diagram showing a state in which a molded product is set in a lower mold in a step of pressure-bonding a base material and a composite sheet material by a vacuum pressing method.

FIG. 4 is a diagram showing a pressed state in a step of pressure-bonding a base material and a composite sheet material by a vacuum pressing method.

[Explanation of symbols]

 12 base material 14 non-woven fabric 16 wood board for design 18 coating layer 20 resin sheet material 22 composite sheet material 24 upper mold 28 pressure chamber 30 silicon rubber 32 heater 34 lower mold

Claims (1)

[Scope of utility model registration request] 1. A laminated wooden board for designing is laminated on a base material, and a resin sheet material made of a thermoplastic resin is further laminated on the wooden board for designing to have a laminated structure in which they are integrally joined. A wood product, wherein a coating layer is formed on the surface of the resin sheet material.