JP3166104U - Veneer laminated plywood - Google Patents

Abstract

Provided is a plywood for affixed structure having a beautiful ideogram and having a structural strength. A structural plywood is applied to a substrate and a veneer is attached to at least one surface thereof. The veneer 2 and the prepreg adhesive sheet are temporarily bonded, and then the member 1 and the substrate 1 that are temporarily bonded to the veneer 2 and the prepreg adhesive sheet are heated and pressed. [Selection] Figure 1

Description

      The present invention relates to a plywood for a veneer pasting structure.

In general, a veneer-attached decorative plywood is obtained by adhering a veneer to a plywood having good surface properties, giving a beautiful grain to the surface of the plywood, and having a good surface accuracy. Although the surface property of this veneer decorative board is good, it cannot be said that the strength as a structural member is ensured, and it is not inexpensive in terms of price. On the other hand, structural plywood stipulated by the Japanese Agricultural Standards (JAS) has the strength of structural members, but the surface of the plywood is peeled off, wormholes, cracks, scratches, dirt, open cracks and missing joints, etc. It was seen that the surface properties were not good.

JP2003-1605 JP 2002-46105 A JP-A-10-305530

    Structural plywood is made for the purpose of using the main parts in terms of structural strength, and is mainly used for wall base materials, floor base materials, roof base materials and the like of wooden buildings. However, in recent years, from the viewpoint of building price reduction and request for shortening the construction period, depending on the place where structural plywood is applied, there is a method of applying it as a finishing material with improved surface condition and structural strength depending on the application location. ing. Although the surface condition of structural plywood is regulated by the Japanese Agricultural Standards (JAS), it was originally applied as a base material, so it peeled off, wormholes, cracks, scratches, dirt, and openings on its surface Cracks, missing joints, etc. were seen, making it impossible to apply as it is as a finishing material. On the other hand, there is a decorative plywood that emphasizes the surface condition rather than the structural yield strength and has an excellent surface condition, but it is very expensive compared to the structural plywood. In view of such circumstances, the present invention aims to provide a structural plywood that is inexpensive and has an excellent surface condition.

In order to achieve the above object, the present invention applies a structural plywood conforming to the JAS standard to the base material, and attaches a veneer to this surface to improve the surface condition and structural veneer with a structural strength. Is to provide. The veneer surface may be further finished. As the finish coating, a clear coating or a light color coating is usually applied, and heat drying or UV curing is performed.

The veneer structural plywood of the present invention uses structural plywood as the base material, so it satisfies the characteristics of structural plywood according to the JAS standard, and a veneer is affixed to at least one of its surfaces Therefore, there is no peeling, bug holes, cracks, scratches, dirt, open cracks or missing joints on the surface, and even if multiple sheets are arranged, the pattern is almost uniform and the finish with structural strength without any problems in appearance Applicable as a material. For this reason, the use of the veneer plywood structure plywood has characteristics as a base material and a finishing material, so that the material can be obtained at a low cost and the work man-hours can be reduced. In addition, if thinned wood is applied to the veneer, the material can be obtained at a lower cost and the price can be reduced. If the veneer surface of the veneer for the veneer structure is applied with woodworking such as urethane or acrylic Further, it is possible to obtain a structural plywood having a surface protective layer which improves appearance and impact resistance and prevents the surface of the veneer from being damaged or dented.

Sectional drawing of the plywood for veneering structure of this invention is shown. Sectional drawing before adhesion | attachment of the plywood for veneer sticking structure using the veneer which bonded the veneer of this invention and the prepreg adhesive sheet is shown. Sectional drawing of the veneer for a veneer sticking structure in the case of bonding the veneer which bonded the veneer and the prepreg adhesive sheet of this invention to the structural plywood which apply | coated the adhesive agent is shown. Sectional drawing of the laminated board for veneer-pasting structures in the case of adhere | attaching on the laminated board for structures using the veneer which bonded together the veneer of this invention and the prepreg adhesive sheet with a cushioning property is shown. The prepreg sheet which has a part which does not apply | coat an adhesive agent while applying an adhesive agent in a rectangular shape is shown.

Next, modes for carrying out the present invention will be described with reference to the drawings.
FIG. 1 shows a cross-sectional view of a veneer structure plywood 10 according to an embodiment of the present invention. A structural plywood conforming to the JAS standard is applied to the base material 1, and a veneer 2 is pasted on one side thereof with an adhesive 3. Adhesion may be performed by applying or spraying the adhesive 3 to the substrate 1 or applying a prepreg adhesive sheet. After sticking the veneer 2 to the substrate 1, the substrate 1 and the veneer 2 are firmly bonded by a heat and pressure press. The sticking plate 2 is usually attached to the substrate 1 on one side, but depending on the application, it may be attached to both the front and back surfaces. In addition, depending on the application, it has a surface protection layer that makes natural wood feel good by applying clear or light-colored urethane or acrylic woodwork to the veneer surface of one or both sides of the veneer for attaching veneer structure Structural plywood can be obtained.

    FIG. 2 is a sectional view of a veneer plywood 10 according to another embodiment of the present invention. In this example, a structural plywood conforming to the JAS standard is applied to the substrate 1 and a prepreg adhesive sheet 4 is applied to the veneer 2 for bonding. In this case, the veneer 2 and the prepreg adhesive sheet 4 are temporarily bonded at a temperature lower than the main curing temperature to increase the strength of the veneer 2. Then, the thing which bonded the veneer 2 and the prepreg adhesive sheet 4 temporarily is bonded to the base material 1, and the base material 1 and the veneer 2 are firmly bonded by a heat and pressure press heated to the main curing temperature. When the veneer 2 alone is attached to the structural plywood of the base material 1 via the prepreg adhesive sheet 4, the veneer 2 may be damaged depending on the surface state of the structural plywood. By applying a material in which the plate 2 and the prepreg adhesive sheet 4 are temporarily bonded, the strength of the veneer 2 is increased and the damage is reduced.

    FIG. 3 shows a cross-sectional view of a veneer structure plywood 10 according to another embodiment of the present invention. In this example, a structural plywood conforming to the JAS standard is applied to the base material 1, and the adhesive 3 applied to the base material 1 and the prepreg adhesive sheet 4 is applied to the veneer 2. In this case, the veneer 2 and the prepreg adhesive sheet 4 are temporarily bonded at a temperature lower than the main curing temperature to increase the strength of the veneer 2. Thereafter, the substrate 1 and the veneer 2 are firmly bonded with a heating and pressing press heated to the main curing temperature by pasting the veneer 2 and the prepreg adhesive sheet 4 to the substrate 1 coated with the adhesive 3. Adhere to. In this device, since the adhesive 3 is applied to the base material 1, it is difficult to cause a bonding failure between the veneer 2 and the base material 1 due to the unevenness of the surface of the structural plywood as the base material 1.

    FIG. 4 shows a cross-sectional view of a veneer structure plywood 10 according to another embodiment of the present invention. In this example, a structural plywood conforming to the JAS standard is applied to the base material 1, and the adhesive 3 applied to the base material 1 and the prepreg adhesive sheet 5 is applied to the veneer 2. The prepreg adhesive sheet 5 is a cushioning sheet. In this case, the veneer 2 and the cushioned prepreg adhesive sheet 5 are temporarily bonded at a temperature lower than the main curing temperature to increase the strength of the veneer 2. Thereafter, the product obtained by temporarily adhering the veneer 2 and the cushioning prepreg adhesive sheet 5 is bonded to the base material 1 to which the adhesive 3 is applied, and the base 1 is struck with a heating and pressing press heated to the main curing temperature. The plate 2 is firmly bonded. Since the cushioned prepreg adhesive sheet 5 is applied, it is easy to bond even when the surface of the structural plywood which is the substrate 1 is uneven.

FIG. 5 shows an application example of the adhesive applied to the prepreg adhesive sheet 3 and the cushioned prepreg adhesive sheet 5. Although FIG. 5 shows an application example to the prepreg adhesive sheets 3 and 5, the adhesive having the same shape may be applied to the base material 1. The shape in which the adhesive is applied is a solid, substantially rectangular shape 7, and the shape in which the adhesive is applied across the portion 8 where the adhesive is not applied is arranged so as to be substantially linear in a plurality of rows. . The portion 8 where the adhesive is not applied is substantially linear, and all the portions communicate with each other and are in contact with the outside at the end of the sheet. The adhesive is not applied to the entire surface in this way, but the adhesive 8 is applied to each other by providing a portion 8 which is not applied with the adhesive between the rectangular shapes 7 to which the adhesive is applied. When the uncoated portion 8 adheres the base 1 and the veneer 2 with a heat and pressure press, it is generated from the base 1, the veneer 2, the adhesive 3, the prepreg adhesive sheet 3, the cushioned prepreg adhesive sheet 5, etc. It becomes a passage for moisture, steam, gas, etc., and the substrate 1 and the veneer 2 can be bonded well.

Instead of structural plywood used in places where aesthetics are also required and structural strength is required, it is mainly used for wall base materials, roof base materials, etc. for wooden buildings, reducing the price of buildings Expected to shorten the work period.

1 Base material (plywood for structure)
2 Veneer
DESCRIPTION OF SYMBOLS 3 Adhesive 4 Prepreg adhesive sheet 5 Cushioning prepreg adhesive sheet 6 Sheet material 7 Adhesive applied in a rectangular shape 8 Part where adhesive is not applied
9 Paint 10 Veneer plywood

Claims (7)

A plywood pasting structure plywood characterized in that a structural plywood is applied to a substrate and a veneer is pasted on at least one surface thereof.
2. The veneer sticking according to claim 1, wherein the veneer and the prepreg adhesive sheet are temporarily bonded, and then the member temporarily bonded to the veneer and the prepreg adhesive sheet and the base material are heated and pressed. Structural plywood.
2. The pressure-bonding is performed by temporarily bonding a veneer and a prepreg adhesive sheet, and thereafter, a member temporarily bonded to the veneer and the prepreg adhesive sheet, and a substrate coated with an adhesive. Plywood for veneer pasting structure.
The plywood for a veneer sticking structure according to any one of claims 2 and 3, wherein a prepreg adhesive sheet having a cushioning property is applied to the prepreg adhesive sheet.
The adhesive in the prepreg state applied to the adhesive sheet is a solid, almost rectangular, rhombus, circular, elliptical shape, etc., and the adhesive applied shapes do not overlap each other. 5. The device according to claim 2, wherein the adhesive is applied so that the shape of the applied adhesive is substantially linear in a plurality of rows through a portion where the adhesive is not applied to the entire periphery. Plywood for veneer pasting structure as described.
The adhesive applied to the base material is a solid, almost rectangular, rhombus, circular, elliptical shape, etc., with the adhesive applied to the entire circumference so that the shapes applied with the adhesive do not overlap each other The veneer pasting structure according to any one of claims 1 and 3, wherein a shape in which the adhesive is applied is arranged so as to be substantially linear in a plurality of rows through a portion where the adhesive is not applied. plywood.

A veneer pasting characterized in that the veneer surface of the veneer for a veneer pasting structure according to any one of claims 1, 2, 3, 4, 5 and 6 is coated with wood, such as urethane or acrylic, on the veneer surface Plywood for mounting structure.

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