JPH0630440Y2 - Decorative plywood for vehicle interior - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] This invention is for interior plywood, especially for vehicle interiors that does not deteriorate in quality over a wide range of temperature fluctuations, has excellent heat resistance, and has good moldability. It relates to a suitable thin decorative plywood.

[Conventional technology]

From the viewpoint of reducing vehicle weight and increasing interior space, vehicle interior materials are required to be light and thin.

Therefore, the decorative plywood for vehicle interior needs to be so-called thin.

Conventionally, such a thin decorative plywood has a thickness of 2 to 3
Thickness of 0.1 mm on the surface of core material such as lauan plywood of about mm
A decorative veneer with a thickness of about 0.3 mm is laminated and a transparent coating film with a thickness of 0.1 to 0.3 mm is formed on this decorative veneer, or a heat is applied between the decorative veneer and the core material. Some include a curable resin-impregnated paper laminated cured product.

[Problems to be solved by the device]

However, the former decorative plywood has the drawback of lacking rigidity and being easily deformed by a slight external force, and the dimensional change due to moisture absorption / exhaust of the core material and decorative veneer or temperature change is caused. Affect the transparent coating of
There is a problem that it causes minute irregularities in the coating film, and there is a problem that it is not suitable for vehicle interior applications where the operating conditions are severe and the temperature changes drastically.The latter decorative plywood has poor moldability, and shape stability and rigidity after curved surface molding. There were also shortcomings such as shortage.

Therefore, the present invention is suitable for vehicle interior applications, which are thin, yet have high rigidity, do not suffer quality deterioration due to large changes in environmental conditions such as temperature changes, and have good moldability, shape stability, and rigidity. The purpose is to provide a simple makeup plywood.

[Means for Solving the Problems]

In this invention, an aluminum plate is laminated on one surface of a core material made of a thin wooden plate, and a thermosetting resin-impregnated paper laminated cured product is laminated on the other surface, and a decorative single layer is applied on the thermosetting resin-impregnated paper laminated cured product. The above problem is solved by arranging a plate and a thin wood plate on the outside of the aluminum plate and providing a transparent coating film on the decorative veneer.

[Action]

Since the thermosetting resin-impregnated paper laminated cured product is a fiber-reinforced synthetic resin (FRP) in a broad sense, it has high hardness, rigidity and dimensional stability. Therefore, since the core material has a sandwich structure in which the thermosetting resin-impregnated paper laminated cured product and the aluminum plate are inserted, the rigidity of the molded product is large and the molded product is not easily deformed by an external force. In addition, moisture absorption and desorption of makeup veneer,
The movement due to the temperature change is suppressed by the thermosetting resin-impregnated paper laminated cured product adhered thereto, or does not adversely affect the surface coating film. Further, the moisture absorption / exhaust of the core material and the movement due to the temperature change are suppressed by the thermosetting resin-impregnated paper laminated cured product attached thereto, and are prevented from being transmitted to the decorative veneer. Further, since the aluminum plates are bonded together, the plasticity is increased and the shape stability of the molding after molding is improved. Further, since the back surface is a thin wood plate, when the decorative plywood is used by being joined to another structural material, the thin wood plate provides a cushioning effect and the selection range of the adhesive is widened.

〔Example〕

FIG. 1 shows an example of a decorative plywood for vehicle interior according to the present invention. In the drawing, reference numeral 1 is a thin wood plate which serves as a core material. As this wood thin plate 1, only one Lauan thin veneer having a thickness of about 0.3 to 0.5 mm or a laminate of two or three of these laminated with an adhesive is used. 0.3
It is about 1.5 mm.

A thermosetting resin-impregnated paper laminated cured product 2 is integrally attached to one surface of the core material 1. This thermosetting resin-impregnated paper laminated cured product 2 is a plurality of resin-impregnated papers obtained by impregnating raw paper such as kraft paper or rayon paper with an uncured liquid of a thermosetting resin such as phenol resin, diallyl phthalate resin or guanamine resin. It is a sheet-like material which is laminated, heated and pressed to be in a cured state, and has a thickness of about 0.6 to 1.5 mm and a resin content of about 40 to 60% by weight.

An aluminum plate 3 is integrally attached to the other surface of the core material 1. The aluminum plate 3 has a thickness of 0.5 to 0.5 such as a hard aluminum plate and a high strength aluminum plate.
The thing of about 1.5 mm is used.

A decorative veneer 4 is integrally attached to the surface of the thermosetting resin-impregnated paper laminated cured product 2. As the decorative veneer 4, a thin decorative veneer having a thickness of about 0.1 to 0.4 mm such as oak, teak, walnut, and rosewood is used.

A transparent coating film 5 is provided on the surface of the decorative veneer 4. The transparent coating film 5 is coated with a paint such as melamine resin paint, epoxy resin paint, unsaturated polyester resin paint, polyurethane resin paint, acrylic resin paint,
It is a colorless and transparent or colored transparent coating film having a thickness of about 0.2 to 0.8 mm formed by drying.

Furthermore, a thin wood plate 6 is provided on the surface of the aluminum plate 3.
Are pasted together. As the wood thin plate 6, only one Lauan thin veneer having a thickness of about 0.3 to 0.5 mm or a thin plywood laminated with about 2 to 3 of these is used.
Its thickness is about 0.3 to 1 mm.

Such a decorative plywood is manufactured by laminating a thermosetting resin-impregnated paper laminated cured product separately on one surface of a wood thin plate 1 serving as a core material with an adhesive, and epoxy resin on the other surface. An aluminum plate 3 coated with an adhesive such as a system adhesive is stacked, a thin wood plate 6 is stacked on the aluminum plate 3, and a decorative veneer 4 is stacked on the thermosetting resin-impregnated paper laminated cured product 2. To match. The stacked product is heated and pressed using a hot press or the like, and the core material 1, the thermosetting resin-impregnated paper laminated cured product 2, the aluminum plate 3, the decorative veneer 4 and the wood thin plate 6 are bonded and integrated. At this time, if a molding die having a desired shape including a male die and a female die is used and heated and pressed, a laminate shaped into a desired shape can be obtained. Then, a transparent coating film 5 is formed on the surface of the decorative veneer 4 of the obtained laminate by a usual coating method.

In such a decorative plywood, since the highly rigid thermosetting resin-impregnated paper laminated cured product 2 and the aluminum plate 3 are bonded to the core material 1, the rigidity is increased and the shape after molding is improved. It is stable against changes in environmental conditions and does not easily deform due to external force. In addition, since the decorative veneer 4 is integrally attached to the thermosetting resin-impregnated paper laminated cured product 2 having good dimensional stability, the decorative veneer 4 is prevented from absorbing / exhausting moisture and dimensional change due to temperature change. It is possible to prevent the smoothness of the transparent coating film 5 from being deteriorated due to the dimensional change of the single plate 4. Further, since the core material 1 is integrated with the thermosetting resin-impregnated paper laminated cured product 2, the movement of the core material 1 itself due to moisture absorption / exhaustion and temperature change is suppressed, and this movement is propagated to the decorative veneer 4. It is also prevented. Furthermore, thin decorative veneer 4
However, since the smooth thermosetting resin-impregnated paper laminated cured product 2 is bonded to this, the surface roughness or movement of the core material 1 does not appear on the surface, and The feeling of metal material due to the aluminum plate 3 used on the back surface of the material 1 is cut off. Further, since the aluminum plate 3 is attached, the shape after the curved surface is not restored to the desired curved shape, and the shape variation is suppressed,
A molded plywood having a primary curved surface or a secondary curved surface can be used. Furthermore, the dimensional change due to the temperature change of the aluminum plate 3 having a relatively large thermal expansion coefficient is transmitted to the decorative veneer 4 by the core material 1 and the thermosetting resin-impregnated paper laminated cured product 2 having a low thermal expansion coefficient. Is suppressed and the quality of the transparent coating film 5 is not deteriorated. Furthermore, since the wood-based wood thin plate 6 is exposed on the back surface, a wide selection range of adhesives when the decorative plywood is attached to other structural materials,
Strong and inexpensive adhesion is possible, and in this joining, the elasticity of the thin wooden plate 6 provides a cushioning effect, which improves the safety against cushioning and reduces the impact of external force on the coating film.

[Experimental example]

A thermosetting resin obtained by using Lauan veneer having a thickness of 0.5 mm as a core material 1, and a phenol resin-impregnated kraft paper laminated semi-cured sheet (0.6 mm in thickness) is previously cured on one side thereof by hot pressing. An aluminum plate 3 coated with polyurethane resin adhesive on both sides is laminated on the other surface of the impregnated paper laminated cured product 2, and a 0.5 mm thick lauan veneer is used as a wood thin plate 6 on the aluminum plate 3. A thickness of 0.
A 2 mm walnut decorative veneer was laminated as a decorative veneer 4 to obtain a laminated product. Using a semi-cylindrical forming die with a radius of curvature of 100 mm, this laminated product is heated at a temperature of 120.
The mixture was heated and pressed at 0 ° C., a pressure of 0.2 MPa, and a time of 15 minutes to laminate and integrate the layers to obtain a semi-cylindrical laminate. An unsaturated polyester resin coating material was applied to the surface of the laminated veneer 4 of this laminate to form a transparent coating film 5 having a thickness of 0.5 mm to obtain a decorative plywood.

The molded decorative plywood was left for 72 hours in an environment of a temperature of 80 ° C. and a relative humidity of 90%, and the surface condition was observed.
No abnormalities were observed in the transparent coating film 5, the original smooth surface was maintained, and almost no change was observed in the shape and size of the entire decorative plywood.

[Effect of device]

As described above, the decorative plywood for vehicle interior of the present invention has an aluminum plate on one surface of a core material made of a thin wooden plate,
A thermosetting resin-impregnated paper laminated cured product is superposed on the other surface, a decorative veneer is placed on the thermosetting resin-impregnated paper laminated cured product, and a wood thin plate is placed on the aluminum plate. As a transparent coating is provided on a single plate, it is highly rigid and does not easily deform due to external force, and its shape is stable and stable against wide changes in environmental conditions such as temperature changes. In addition, there is an effect that molding such as curved surface molding can be performed, a thin product having a small thickness can be obtained, and an adhesive design is easy when bonding to another structural material.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an example of a decorative plywood for vehicle interior of the present invention. 1 ... Core material, 2 ... Thermosetting resin impregnated paper laminated cured product, 3 ... Aluminum plate, 4 ... Decorative veneer, 5 ... Transparent coating film, 6 ... Wood thin plate.

Claims (1)

[Scope of utility model registration request] 1. An aluminum plate is laminated on one surface of a core material made of a thin wooden plate, and a thermosetting resin-impregnated paper laminated cured product is laminated on the other surface, and the thermosetting resin-impregnated paper laminated cured product is placed on the outside of the laminated product. A decorative plywood for vehicle interior, comprising a decorative veneer, a thin wood plate on the outside of the aluminum plate, and a transparent coating film provided on the decorative veneer.