JPH0675743U - Laminate - Google Patents

Abstract

(57) [Summary] [Purpose] Uses a combination of wood fiberboard and wood slab that are homogeneous in bending strength and dimensional stability. To provide a laminated board suitable for excellent building materials and furniture. [Structure] Wood chipboard (particle board) 1 in the center layer
Is placed, and the wood fiber boards 2 and 2 having a specific gravity of 0.5 to 1.2 are laminated and adhered on both surfaces to be integrated to form a laminated board.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a laminated plate used as a building material or a furniture member.

[0002]

[Prior art]

 Wood-based boards such as sawn timber, plywood obtained by laminating veneers, and veneer laminated boards (LVL, LVB) are used for a wide variety of purposes as members for construction and furniture. It is used. Since these have a constant fiber direction, the coefficient of expansion in the direction perpendicular to the fiber direction due to water absorption and moisture is large, and dimensional stability is lacking. Furthermore, the strength against bending load parallel to the fiber direction is low, and 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 printing, surface painting, and paper sticking. There were problems such as

As a plate material having no fiber orientation, a wood fiber board and a wood shaving board are known. They can have homogeneous properties in bending strength and dimensional stability regardless of the orientation of the plate.

[0004]

[Problems to be solved by the device]

 The plate-shaped products generally called wood fiberboard are a generic name for a group of products with different properties, and many plate-shaped products with different properties are provided to meet the required performance for various applications. According to Japanese Industrial Standards, these fiberboards are classified into three types by specific gravity: soft fiberboard (specific gravity 0.4 or less), medium quality fiberboard (specific gravity 0.4 to 0.8) and hard fiberboard (specific gravity 0.8 or more). The properties and strength of each fiberboard differ depending on the difference in specific gravity. That is, soft fiberboard is mainly used for building walls, ceilings, base materials, tatami mats, etc., medium fiberboard is mainly used for furniture members and construction, and hard fiberboard is mainly used for automobile interior members. ing. The surface of the wood fiber board is subjected to various secondary processing treatments such as surface printing, surface painting, sheet attachment, and embossing, if necessary.

A wood fiber board is formed by continuously sprinkling wood fibers mixed with an adhesive at a predetermined position to form a continuous mat having an arbitrary thickness, cutting the mat into a certain size, and then pressing the fixed size mat. To obtain a plate-shaped body having a constant thickness. Although such a wood fiber board is homogeneous in terms of bending strength and dimensional stability, it does not reach the bending strength of wood shavings of the same specific gravity. Bending strength is improved by using wood fiberboard with high specific gravity, but it is inferior in lightness. Further, the wood fiber board has insufficient nail holding power because the disentangled wood fibers are only physically intertwined with each other.

On the other hand, the wood shavings plate is relatively excellent in bending strength, and is also excellent in nail holding power because it is formed in a state where the original wood structure remains as wood chips. Because of its randomly exposed surface texture, it has generally been used as a base material in the past. Moreover, even if a cutting process such as a groove process is performed on the surface of the wood shaving plate, the chips are scattered, which is actually difficult. As described above, the wood shavings plate is inferior in surface smoothness, cosmetic property, and workability, and it has been difficult to use it as a building material for interior and exterior or a plate material for furniture.

[0007]

[Means for Solving the Problems]

 The present invention has been made in view of the above problems of the prior art, and combines a wood fiber board and a wood shaving board, both of which are homogeneous wood materials, into a laminated board, and takes advantage of both of them. However, the purpose is to solve the drawbacks and to apply a material that has excellent bending strength and dimensional stability in all directions, and excellent surface properties and workability.

This object can be achieved by the present invention, which is a laminated plate formed by adhering and integrating wood fiberboards having a specific gravity of 0.5 to 1.2 on the front and back surfaces of a wood shaving plate.

As the center layer of this laminated plate, a wood chip plate such as a particle board, a wafer board or a strand board is used.

The wood fiber board to be the front and back layers of the laminated board has a specific gravity of 0.5 to 1.2. The reason is that if the specific gravity is less than 0.5, it is preferable from the viewpoint of weight reduction, but the bending strength as a laminated plate cannot be sufficiently obtained, and the intended use is limited. On the other hand, if the specific gravity exceeds 1.2, the bending strength is improved, but the weight increase is remarkable. In this way, the specific gravity range of the wood fiberboard is specified in order to achieve both high lightness and strength characteristics as a laminated board.

Further, in consideration of workability, the specific gravity of the wood fiber board is preferably 0.8 or less. If a wood fiber board of 0.8 or more, that is, a hard fiber board is used for the front and back layers, it becomes difficult to nail from the surface, and there arises a problem that the blade edge of the saw is deteriorated even in the cutting process.

[0012] Such a laminated board is manufactured by manufacturing a wood shaving board forming a central layer and a wood fiber board forming front and back layers respectively according to a conventional method, and then producing a urea resin type, a urethane resin type, an epoxy resin type, Using a synthetic resin adhesive such as vinyl resin type, phenol resin type, or their modified resin type, laminate the wood fiberboard on the outer surface of the wood shaving board, and then press it by hot press or cold press. Obtained by gluing.

Since the front and back layers of the laminated board are made of wood fiberboard having good surface properties, surface treatment of a sheet-shaped decorative material such as a vinyl chloride sheet, a veneer, or a decorative paper (overlay) is performed on the surface as necessary. Processing), surface printing processing, surface coating processing, embossing by pressing, etc. can be easily performed.

[0014]

[Action]

 When an external force is applied from the front side, excellent bending strength is exhibited due to the compressive strength of the wood fiberboard placed on the front side and the tensile strength of the wood fiberboard placed on the back side. In addition, the wood fiber boards forming the front and back layers have excellent surface smoothness and cosmetic properties, and can be easily subjected to cutting such as grooving.

The wood shaving plate forming the center layer is formed in a state where the original wood structure remains as wood chips, and therefore exhibits excellent nail holding power.

[0016]

【Example】

 A laminated board according to an embodiment of the present invention shown in FIG. 1 is formed by bonding wood fiberboards 2 and 2 having a specific gravity of 0.65 to the front and back surfaces of a particle board 1 having a specific gravity of 0.55, respectively. .

[0017]

[Effect of device]

 Since the present invention is a laminated board that is a combination of wood fiber board and wood shaving board that exhibits uniform bending strength and dimensional stability, it can be used regardless of the direction of the board when it is used for building materials or furniture. In addition, it is not necessary to consider the direction of the plate material when performing cutting or the like.

Since the wood fiberboards are arranged on the front and back layers of the laminated board of the present invention, when an external force is applied to the surface, the compressive strength of the wood fiberboard on the front side and the wood fiberboard on the back side are It exhibits excellent bending Young's modulus (rigidity) depending on the tensile strength. Furthermore, since the wood fiber plates of these front and back layers are constrained by the wood shavings on the inner surface side, the bending strength is further increased.

In addition, the center layer of the laminated plate of the present invention is a wood shavings plate having a bending specific gravity superior to that of the wood fiberboard of the same specific gravity, so that the total weight of the laminated plate is reduced. However, it is possible to obtain a laminated plate which can exhibit a large bending strength and is excellent in nail holding power and which is suitably used as a member for construction and furniture.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a laminated plate according to the present invention.

[Explanation of symbols]

 1 particle board 2 wood fiberboard

Claims (1)

[Scope of utility model registration request] 1. A specific gravity of 0.
A laminated board made by adhering 5 to 1.2 wood fiberboards and integrating them.