JPH07139084A - Composite panel - Google Patents

Abstract

PURPOSE:To improve a retaining force for the nail and screw of woody fiberboard used as a batten without increasing the specific gravity thereof, regarding a composite panel having a face material pasted to both sides of a frame body formed out of woody fiberboard as a rod material. CONSTITUTION:Regarding a composite panel formed out of a frame body assembled with a batten material and a face material pasted to both sides of the frame body, woody fiberboard having a hard layer on both sides is used as the batten material. The vertical batten at both sides, and upper and lower battens are assembled, so that the hard layer of the woody fiberboard is positioned at right angles with both sides of the frame body.

Description

Detailed Description of the Invention

[0001]

[Industrial application] The present invention relates to a composite panel used for building wall materials, furniture, fittings, and the like.

[0002]

2. Description of the Related Art Conventionally, a bar assembly made of plywood, laminated veneer lumber, lumber, wood shavings (particle board, flake board, strand board, OSB, etc.) is used as a crosspiece for core assembly. Then, a frame body was obtained, and face materials were attached to the front and back sides to form a composite panel. By the way, in recent years, as the problem of resource depletion including South Sea timber and the problem of environmental protection have been highlighted, wood fiber boards made from wood fiber obtained from scrap wood and waste wood have attracted attention and are used as crosspieces. A composite panel has been provided.

However, since the wood fiberboard is made of a homogeneous material throughout, it is good for warping and twisting of the panel, but it is made of wood fibers hardened with an adhesive, such as nails and screws. Since the holding power was low, the specific gravity of the wood fiberboard was increased and used. Therefore, there remains a problem that the weight of the composite panel could not be reduced.

[0004]

[Technical Means] In a composite panel in which face materials are attached to the front and back surfaces of a rectangular frame core-assembled by rail members composed of upper and lower horizontal rails and vertical rails on both sides, a hard material is used on the front and back surfaces as a rail material. A composite panel that uses a wooden fiberboard having layers, and the vertical rails on both sides and the upper and lower horizontal rails are cored so that the hard layers of the wooden fiberboard are perpendicular to the front and back of the frame body.

[0005]

[Description of Configuration] The configuration of the present invention will be described below. A bar material obtained by cutting a wood fiberboard having hard layers on the front and back surfaces into an arbitrary width is used as the crosspiece. The wood fiberboard is preferably a medium-density fiberboard having a hard layer on the front and back surfaces and a center layer disposed between the hard layers and having a specific gravity of 0.4 to 0.8. The front and back parts are 0.8 to 1.4, preferably 1.0 to 1.
It has a specific gravity of 2 and a thickness of 0.3 to 3 mm, preferably 0.5 to 2 mm. The specific gravity of the central layer is 0.4 to 0.75, preferably 0.6 to 0.7.

The specific gravity of the hard layer differs from that of the central layer by at least 0.1, preferably 0.3 or more.
In this way, since the specific gravity is higher than that of the central layer, and the hard layers having excellent tensile strength and compressive strength are arranged on the front and back portions,
Light weight, high bending strength, and small change in deflection with load. Hard layer thickness 0.3mm
If the specific gravity is less than 0.8, the specific resistance is less than 0.8, the pull-out resistance when driving a nail, a screw, or the like is small, the holding force becomes insufficient, and the product easily comes off.

On the contrary, the layer thickness exceeds 3 mm and the specific gravity is 1.4.
If it exceeds, it becomes too hard and it becomes difficult to drive nails, screws and the like. Regarding the specific gravity of the central layer,
If it is less than 0.4, the strength of the crosspiece becomes insufficient,
On the other hand, when it exceeds 0.75, the total weight of the composite panel becomes large, which causes inconvenience in handling.

Regarding the difference in specific gravity between the hard layer and the central layer,
If it is less than 0.1, sufficient bending strength and bending cannot be obtained unless it is made as large as the layer thickness of the hard layer, resulting in a large weight, which makes the composite panel large in total weight and inconvenient to handle. Occurs.

On the contrary, if there is a difference in specific gravity larger than 0.8,
A large difference occurs in the physical properties of the hard layer and the central layer.
That is, for example, for a bending load, a compressive force acts on the load side and a tensile force acts on the opposite load side, but in the hard layer, the specific gravity is large and the wood fibers are dense, so in the inner surface direction While the compression and tensile deformation of 3) are unlikely to occur, the center layer has a small specific gravity and the wood fibers are sparse, so that compression and tensile deformation easily occur. When the physical properties are remarkably different from each other, delamination is likely to occur between the hard layer and the center layer, which is not preferable.

Such a wood fiber board is defibrated and added with an adhesive or the like in a manufacturing process of the wood fiber board by a dry method, and the dried wood fiber is accumulated on a screen conveyor by a forming device, It is obtained by pressing to obtain a wood fiber mat, then cutting it into a fixed size to obtain a standard length wood fiber mat, and then heat-pressing this. In the above manufacturing process, if the amount of the adhesive added to the wood fiber is increased, the hard layer is formed to have a larger thickness. Further, water is applied to the upper surface or the lower surface of the regular length wood fiber mat, or a water-retaining sheet-like material such as a non-woven fabric, paper or cloth is hydrated and placed on the upper surface or the lower surface of the wood fiber mat. When heated in this state, heating and pressing are performed with the water content of the front and back portions being increased, so that the layer thickness of the hard layer increases.

In this way, the layer thickness of the hard layer in the wood fiberboard can be adjusted. The obtained wood fiber board has a low specific gravity thin surface layer formed by pre-cure of the adhesive at the time of heating and pressing, and therefore is sanded to remove the low specific gravity thin surface layer to expose the hard layer.

Next, a method of assembling the frame body of the panel of the present invention will be described. First, a rectangular frame body is formed by core-assembling using rod-shaped crosspieces consisting of upper and lower horizontal rails and both vertical rails obtained by cutting a wood fiberboard with hard layers on the front and back sides to an arbitrary width. . Alternatively, a bar-shaped crosspiece obtained by cutting a wood fiberboard having a plurality of wood fiberboards having hard layers on the front and back surfaces and adhering the wood fiberboard to an arbitrary width may be used. At this time, the vertical rails on both sides and the upper and lower horizontal rails are assembled so that the hard layers of the wood fiberboard are at right angles to the front and back of the frame. The core assembly may be made by forming the crosspiece into a square shape such as a square shape, a day shape, an eye shape, and a rice field shape, which is usually performed.

Next, face materials are attached to both surfaces of the frame body to obtain a composite panel. The surface material is plywood, wood fiber board, wood shaving board (particle board, strand board, flake board,
(OSB etc.) Laminated wood, laminated veneer, gypsum board, calcium silicate board, etc., or any composite material of these,
Decorative paper such as decorative paper, decorative resin-impregnated paper, decorative synthetic resin sheet, decorative veneer (slice veneer, rotary veneer, half-land veneer, sawn veneer, artificial veneer, etc.) Is.

If necessary, the composite panel may be chamfered or curved, or may be provided with a decorative material, pattern-printed, or color-painted.
When attaching the face material to which the decorative material has been attached to the frame body, the back surface may be subjected to V-cut processing and comb processing, and the wood mouth portion may be wound and attached. After applying plywood, wood fiberboard, wood shavings (particle board, strand board, flake board, OSB, etc.) as the surface material, make up to include the surface of the surface material or the surface of the surface material so as to include the mouth part of the panel. A material may be attached, or when the material is attached only to the surface, a cosmetic material may be attached to the mouth end portion or a mouth end treatment by color coating may be applied as necessary.

Thus, the wood fiberboard having hard layers on the front and back surfaces is used as the crosspiece, and the hard layers of the wood fiberboard are perpendicular to the front and back sides of the frame body on both side vertical crosspieces and upper and lower horizontal crosspieces. A composite panel was obtained in which the face materials were attached to the front and back surfaces of the frame body assembled in the core.

[0016]

Since a wood fiber board having hard layers on the front and back surfaces is used as the crosspiece, pullout resistance is large when nails, screws, etc. are driven in from the front and back surfaces, and a sufficient holding force can be obtained. In addition, vertical bars on both sides and upper and lower horizontal bars are core-assembled so that the hard layers on the front and back surfaces are at right angles to the front and back surfaces of the frame, and mounting of metal fittings etc. to the composite panel is good for attaching the surface material. To be done.

For example, when a composite panel is used as a folding door body of a closet receiving furniture, and a metal fitting such as a hinge is screwed to a wood mouth surface of the folding door body, a hard wooden fiberboard whose screws are vertical crosspieces. Driven through the layers. Further, even when the pivot metal fittings embedded in the upper and lower wood mouth portions are fixed, since they are embedded by penetrating through the hard layers of the wooden fiberboard which are the upper and lower horizontal crosspieces, a sufficient holding force is obtained and durability is improved.

Claims (1)

[Claims] 1. A composite panel in which face materials are adhered to the front and back surfaces of a frame body core-assembled with a rail material composed of upper and lower horizontal rails and vertical rails on both sides. A composite panel characterized by using a wood fiberboard having the above, and by vertically assembling the vertical crosspieces on both sides and the horizontal crosspieces so that the hard layers of the wood fiberboard are perpendicular to the front and back of the frame.