JPH0976413A - Laminated sheet and production thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a laminated sheet excellent in surface compression strength, high in rigidity and reduced in expansion and shrinkage by water and humidity absorption by arranging a wooden fiber layer only on a surface or on both upper and rear surfaces and arranging a composite plate layer on the rear surface of the surface wooden fiber layer or between the surface and rear wooden fiber layers. SOLUTION: Veneer la obtained by cutting a wooden material is used as a composite plate layer and a plurality of veneers are laminated through an adhesive C1 so that the fiber directions of them cross each other at a right angle. An even number of the veneers are laminated through an adhesive so that the fiber directions of them cross each other at a right angle. A plurality of the veneers 1a are laminated through the adhesive C1 so that all of fiber directions of them become parallel. A composite panel obtained by laminating a plurality of the veneers 1a through the adhesive C1 so that the greater part of them become parallel in a fiber direction or the fiber directions of one or two layers cross each other at a right angle is used. A wooden fiber layer 2 is obtained by compressing and bonding wooden fibers X obtained from a broadleaf tree and a needle-leaf tree.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminate used as a building or furniture member and a method for manufacturing the same.

[0002]

2. Description of the Related Art Wooden boards, generally called plywood and veneer laminated boards, are widely used as building and furniture members.

[0003]

Generally, since plywood and veneer laminated boards have unidirectional or bidirectional fiber directions, expansion and contraction occur due to absorption and release of water, especially in a direction perpendicular to the fiber directions. Has a large expansion coefficient and lacks dimensional stability.

Further, since there are conduit holes on the surface, it is necessary to perform a base treatment such as a sealer treatment or a sealing treatment at the time of processing such as surface coating and paper sticking. Moreover, in recent years, it is difficult to obtain a large amount of good veneers due to depletion of good quality wood, and it is necessary to use poor quality veneer even as a front veneer, so that it is necessary to sufficiently perform the base treatment, resulting in deterioration of quality. There are problems such as reduced productivity and increased cost. The present invention seeks to solve such problems.

[0005]

[Means for Solving the Problems] The wood fiber layers 2 and 2 are arranged only on the front surface or the front and back surfaces, and the composite board layer 1 is described between the back surface of the front wood fiber layers 2 and 2 or the front and back wood fiber layers 2 and 2. Laminated board. More preferably, the wood fiber layer 2 is made of a medium specific gravity fiber board having hard layers 2a having high specific gravity on the front and back portions.

[0006]

1 and 2 show a laminated board of the present invention, 1 being a composite board layer and 2 being a wood fiber layer.

The wood fiber layer 2 is obtained, for example, by pressing and adhering wood fibers x obtained from a hardwood material such as rawan, capol, chestnut and poplar and a softwood material such as pine, cedar and cypress. As for the wood fiber x, those obtained from hardwood are brown in color, whereas those obtained from softwood are white in color. Adhesive y is added to these wood fibers x and heat-bonded. The surface of the wood fiber layer 2 obtained by bonding is white or brown.

As the composite board layer 1, a single board 1a obtained by cutting a wood material is used, and a plurality of composite boards and single boards are laminated with an adhesive agent C1 so that their fiber directions are orthogonal to each other. A plurality of composite plates 1 laminated with an adhesive so that their fiber directions are orthogonal to each other, a plurality of single plates 1a, and a composite plate 1 laminated with an adhesive C1 so that their fiber directions are all parallel A composite plate 1 is used in which a plurality of single plates 1a are laminated, and most of them are laminated so that the fiber directions are parallel to each other, and one or two layers are laminated with an adhesive C1 so that the fiber directions are orthogonal to each other.

The laminated plate is made of a wood fiber layer which is stable against expansion and contraction due to absorption and release of water and has a smooth surface, so that the surface has good cosmetic properties and is a sheet such as a vinyl chloride sheet, a veneer or a decorative paper. It is possible to easily carry out surface pasting of the decorative cosmetic material, overlay processing such as press molding, surface coating and the like.

In the wood fiber layer 2, wood fibers x are entangled,
Since it is bonded with an adhesive to form a layer, it has excellent bending strength and high surface compressive strength. Further, as the wood fiber layer 2, a medium specific gravity fiber board having hard layers 2a having high specific gravity on the front and back portions is used. Hard part 2 with high specific gravity on the front and back
Since it has a, the wood fiber layer 2 is further improved in bending strength,
The compressive strength of the surface was improved.

The composite board 1 as the composite board layer 1 arranged on the back surface of the wood fiber layer 2 or between the wood fiber layers 2 and 2 on the front and back sides may be obtained by using the lower veneer 1a. It is lightweight, has excellent bending strength and compression strength, and is inexpensive.

The laminated plate P has a wood fiber layer 2 made of wood fibers x obtained by defibrating wood to which an adhesive has been added only on the front surface or the back surface, and the back surface of the wood fiber layer 2 or A plurality of single plates 1a between the front and back wood fiber layers 2 and 2
Are laminated and laminated so that the composite plate layer 1 obtained by laminating and bonding is arranged, and then pressure-bonded to integrally bond and form.

Specifically, as shown in FIG. 3, a plurality of single plates 1a obtained by cutting wood are laminated with an adhesive C1 and then pressure-bonded to obtain a composite plate 1. Next, an adhesive y is applied to the wood fibers x obtained by defibrating the wood, and the wood fibers x to which the adhesive y is added are spread in layers on the surface of the composite plate 1 and then compressed. Then, they were bonded and integrally molded to obtain a laminated board P having the composite board layer 1 on the surface of the wood fiber layer 2.

Further, as shown in FIG. 4, the wood fibers x to which the adhesive y is added are sprinkled on a predetermined base b to form a layer, and then the composite plate 1 is laminated on the layered wood fibers and pressed to bond. It may be integrally molded.

Further, a plurality of single plates 1a obtained by cutting wood as shown in FIG. 5 are laminated with an adhesive and then pressure-bonded to obtain a composite plate 1. An adhesive y is applied to a wood fiber x obtained by defibrating wood. After spreading the wood fibers x to which the adhesive is added on a predetermined base b to form a layer,
The composite board 1 is laminated on the layered wood fiber. Next, the wood fibers to which the adhesive has been added are sprinkled in layers on the surface of the composite board 1. It is pressure-bonded and integrally molded, and the wood fiber layers 2 and 2 are arranged on the front and back surfaces.
To obtain a laminated plate P.

Or, a wood fiber x to which an adhesive y is added
Is sprayed on one surface of the composite plate 1 in layers. Alternatively, as shown in FIG.
After the wood fiber x to which the adhesive y is added is sprinkled on the predetermined base b to form a layer as shown in a, the composite plate 1 is laminated on the layered wood fiber and pressure-bonded to integrally form an adhesive. The wood fiber layer 2 is arranged on one side of the composite board 1. Next, as shown in FIG. 6 (b), the wood fiber layer 2 is similarly arranged on the surface of the opposite composite plate to obtain a laminated plate in which the wood fiber layers 2 and 2 are arranged on the front and back of the composite plate 1. To be

As another method, a plurality of veneers 1a obtained by cutting wood are laminated with an adhesive C1 and then pressure-bonded to obtain a composite plate 1. On the other hand, the adhesive y is applied to the wood fiber x obtained by defibrating the wood. After spreading the wood fiber on the predetermined base b to form a layered wood fiber (see FIG. 7).
(A)) Press-bonding to obtain the wood fiberboard 2 (FIG. 7 (b)) Next, the composite board P is laminated on the wood fiberboard 2 with the adhesive C2. A laminated plate P having the wood fiber layer 2 disposed on the front surface or front and back surfaces of the composite plate 1 was obtained by pressing and adhering and integrally molding.

The laminated board P has the wood fiber layers 2 and 2 arranged on the front surface or the back surface, and when an external force is applied to the wood fiber layer 2, the compressive strength and the tensile strength of the wood fiber layer 2 and the restraint by the wood fiber layer. The combined force exerts excellent rigidity, and a lightweight and high-strength laminated plate P can be obtained.

[0019]

EFFECT OF THE INVENTION The laminated board P uses the composite board 1 using the low-priced and cheap veneer 1a, and the wood fiber layer 2 is arranged on the front surface or the front and back surfaces thereof, so that the surface has a smooth cosmetic property. so,
Moreover, the laminated plate P having excellent surface compressive strength, high rigidity, and less expansion and contraction due to water absorption and moisture absorption can be obtained at low cost.

[Brief description of drawings]

FIG. 1 is a sectional view of a laminated plate of the present invention,

FIG. 2 is a cross-sectional view of a wood fiber layer 2 made of medium specific gravity fiberboard,

FIG. 3 is an explanatory view of a manufacturing method when wood fibers x are dispersed on the composite board 1,

FIG. 4 is an explanatory view of a manufacturing method in which the composite plate 1 is laminated on the wood fibers x scattered on the base b,

FIG. 5 is an explanatory view of a manufacturing method in the case where the wood fiber x is sprayed on the base b, the composite board 1 is laminated, and the wood fiber x is further sprayed on the composite board 1.

[FIG. 6] (a) (b) After spreading the wood fiber x on the booth b, the composite board 1 is laminated, and the thus obtained composite board 1 and the wood fiber layer 2 are spread on the base b. Wood fiber x
Illustration of stacking on top,

7A to 7C are explanatory views of a manufacturing method in the case where the composite board layer 1 and the wood fiber layer 2 are molded and then bonded with an adhesive C2.

[Explanation of symbols]

1: composite board layer or composite board, 1a: single board, 2: wood fiber layer or wood fiber board, 2a: hard layer, C: adhesive, x:
Wood fiber, y: Wood fiber adhesive, C1: Single board 1a mutual adhesive, C2: Wood fiber layer 2 and composite board layer 1 adhesive, b: Base, P: Laminate.

Claims (6)

[Claims] 1. A laminate comprising a wood fiber layer only on the front surface or the front and back surfaces and a composite board layer disposed between the wood fiber layers on the back surface and the front and back surfaces of the front wood fiber layer. 2. The laminated board according to claim 1, wherein the wood fiber layer comprises a medium specific gravity fiber board having hard layers having high specific gravity on the front and back portions. 3. The laminated board according to claim 1, wherein the composite board layer is formed by laminating and bonding a plurality of single boards. 4. A wood fiber layer made of wood fibers obtained by defibrating wood to which an adhesive has been added is provided only on the front surface or front and back surfaces, and a plurality of wood fiber layers are provided between the back surface of the front wood fiber layer and the wood fiber layers on the front and back surfaces. A method for producing a laminated plate, comprising laminating a plurality of single plates so that a composite plate layer obtained by laminating and bonding is arranged, and then pressure-bonding to integrally form an adhesive. 5. A wood fiber board is laminated on the front surface or front and back surfaces of a composite board obtained by laminating and bonding a plurality of veneers with an adhesive, and then pressure-bonded to integrally bond. A method of manufacturing a laminated plate. 6. The method for producing a laminated plate according to claim 4, which comprises a composite plate obtained by laminating and bonding an even number of veneers so that their fiber directions are orthogonal to each other.