JPH07102746A - Floor plate - Google Patents

Abstract

PURPOSE:To improve the shock-absorbing and sound-insulating characteristics, by cutting a plurality of grooves with a shorter pitch than a specified distance on the rear face of a wooden fiber plate having an idle veneer thereto, in the direction crossing in right angles with the fiber direction of the idle veneer. CONSTITUTION:A decorative veneer is stuck at the rear face of a wooden fiber plate and an idle veneer having the same fiber direction with the decorative veneer and a buffering material are stuck on the front face thereof. A plurality of grooves with a shorter pitch than 35mm are cut in the crossing in right angles with the fiber direction of the idle veneer on the rear of the wooden fiber plate with the idle veneer. It is preferable that a hard layer having a high specific gravity is provided at the front face of the wooden fiber plate. In such constitution, the grooves serves as a sound absorbing space absorbing a solid-propagating sound resulting from the impulses from the surface and the rigidity of wooden fiber plate itself is remarkably reduced.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a concrete slab and a soundproof floor plate directly attached to a floor base.

[0002]

2. Description of the Related Art As a floor board having soundproofness, a floor board having a decorative veneer on the front surface and a cushioning material on the back surface has been conventionally proposed. In addition, a concrete slab and a floor substrate for direct bonding have also been proposed in which a groove is formed on the back surface of the plywood and a cushioning material is bonded thereto.

The groove formed on the back surface in this proposal is provided in order to absorb unevenness such as a concrete slab and a floor base by the floor plate, and the groove pitch is 50 mm.
It was carved at a pitch or more.

In this case, if the groove pitch is too small,
By engraving the groove, the balance of the synthetic residue on the groove part is unbalanced, and the expansion due to the absorption of water in the veneer is remarkably exhibited, and the corrugated unevenness on the upper surface of the groove part easily occurs. . Therefore, the groove pitch was never set to 50 mm or less.

[0005]

Conventionally, concrete slabs,
As a floor board for direct attachment of a floor base, one in which a groove is formed on the back surface of plywood and a cushioning material is adhered is used in order to absorb unevenness of the floor base. However, this groove pitch is 50 mm
In the case of the following, there was a problem that the floor board was wavy. The present invention intends to obtain a floor board which can absorb impact without waviness even if the groove pitch is 50 mm or less and has high soundproofness.

[0006]

[Technical Means] A floor veneer in which a decorative veneer is attached to the front surface of a wood fiberboard, and a discarding veneer having the same fiber direction as the decorative veneer is attached to the back surface, and a cushioning material is adhered to the veneer veneer. A floorboard in which a plurality of grooves are engraved in a direction orthogonal to the fiber direction of the discarded veneer at a pitch of 35 mm or less on the back surface of the wood fiberboard.

[0007]

[Description of Configuration] A wood fiber board is used as a substrate, and a decorative veneer is attached to the front surface of the substrate and a discarded veneer is attached to the back surface thereof. The wood fiber board having a specific gravity of 0.4 to 0.9 is used, and preferably a wood fiber board having a hard layer having a high specific gravity at least near the surface (specific gravity 0.7 to 1.2) is used.

The wood fiberboard is manufactured as follows.
For example, in the manufacturing process by the dry method, pine, cedar, cypress and other softwood materials, kapole, rawan, chestnut, wood chips such as hardwood materials such as poplar, waste wood chips obtained from wood waste materials such as buildings and furniture It is refined and made into wood fiber, and Thunder dust, Saw dust, etc. are appropriately mixed and used as a raw material.

Adhesives, water repellents, etc. are added to the raw materials, mixed and dried, then formed, deposited on a screen conveyor and temporarily pressed to obtain a wood fiber mat.

Next, a wood fiber board of the desired size is obtained by cutting the wood fiber mat to a constant size into a standard length wood fiber mat and then heat-pressing the mat.

Since a low specific gravity thin surface layer may be formed on the wood fiber board by pre-cure of the adhesive at the time of heat pressing, sanding is performed as necessary to remove the low specific gravity thin surface layer, and the hard fiber layer is hardened. Expose the layer to the surface.

Further, in the above manufacturing process, water is applied to the upper surface or the lower surface of the standard length wood fiber mat, or a water-retaining sheet-like material such as a non-woven fabric, paper or cloth is impregnated with water to obtain the wood fiber mat. When it is placed on the upper surface or the lower surface and heated in this state, it is heated and clamped with the water content of the front and back portions being increased, so that the hard layer on the surface can be formed more significantly.

In this case, the amount of water applied and the amount of water contained in the sheet-like material are appropriately adjusted, the amount of the adhesive added to the wood fibers and the water content of the wood fibers themselves are properly adjusted, and the temperature at the time of pressing is adjusted. By adjusting the press schedule, the hard layer on the surface can be selected to have a desired specific gravity and layer thickness. By exposing the hard layer, the surface was made harder, and wear resistance, scratch resistance, pressure resistance, etc. were improved.

As the decorative veneer, slice veneer, thorn veneer, rotary veneer, half land veneer, artificial veneer, etc. are used. Further, a sheet-like material such as non-woven fabric, thin paper, kraft paper, etc. may be attached to the back surface of the decorative veneer.

As the discarded veneer, the same veneer as the decorative veneer or a defective veneer is used. Alternatively, a veneer obtained from a low-grade lumber that does not give a wood grain for cosmetic use can be used at low cost.

To apply the decorative veneer and the discarded veneer to the front and back of the wood fiberboard, use a coating device (roll coater, flow coater, curtain coater, spreader, sponge coater, sprayer, etc.) on the wood fiberboard. Apply adhesive.

Adhesives are vinyl acetate resin, urea resin,
Melamine resin, phenol resin, acrylic resin, polyester resin, polyurethane resin, epoxy resin, isocyanate, polyethylene resin, SBR, MBR, NBR
Adhesives of synthetic resins or rubbers such as those mentioned above, and the adhesives used alone or optionally modified are used.

A decorative veneer and a discarded veneer are laminated on the front and back surfaces of a wood fiberboard coated with an adhesive, and then hot or cold pressure is applied using a pressing device ((roll press, flat plate press, etc.). The fastening adhesive is cured and then adhered.It is preferable that both the decorative veneer and the discarded veneer have the same fiber direction.

A plurality of grooves are formed on the back surface of the wood fiberboard to which the discarded veneer is attached, in the direction orthogonal to the fiber direction of the discarded veneer. The groove acts as a sound-absorbing void that absorbs solid sound due to the impact from the surface, reduces the rigidity of the wood fiberboard itself, absorbs impact, and is easy to adapt to the ground and absorbs unterrain. it can.

The cutting pitch of the grooves is 35 mm or less, preferably 5 to 30 mm. When the cutting pitch is 5 mm pitch or less, the remaining wood fiber board between the grooves is likely to be chipped, and when it is 35 mm pitch or more, the rigidity of the wood fiber board cannot be lowered, and the ease of fitting with the substrate is lost.

By engraving grooves at a pitch of 35 mm or less, the rigidity of the wood fiberboard itself is lost, and its Young's modulus of bending is 10,000 kg / cm ² or less, preferably 300.
It can be set to 0 to 10000 Kg / cm ² . (The bending Young's modulus when a load is applied in the direction parallel to the groove is shown.)

The width of the groove is 2 to 7 mm, and the groove depth is 2.5 mm or more, preferably 2.5 to 5 mm, so that the rest of the base material remains on the surface regardless of the plate thickness. preferable. If the groove width is 2 mm or less, it is not possible to obtain a sufficient area as a sound absorbing void, and if it is 7 mm or more, the strength of the remaining base material on the groove is reduced and the plate itself cannot be held, and the plate is easily broken. 2.5m remaining base material remaining on groove surface
If it is less than m, not only the strength is lowered, but also the surface of the groove is dented, and a surface wavy state is generated in the groove.

The wood fiberboard is a homogeneous material, and even if a groove is formed, the remaining wood fiberboard on the groove has a hard layer so that the balance of the thickness is not disturbed, and the wood fiberboard absorbs water. Expansion is uniformly generated, and no wavy unevenness is generated on the upper surface of the groove. Furthermore, a plurality of grooves may be engraved in parallel with the fiber direction of the discarded veneer.

Next, a cushioning material is attached to the back surface of the wood fiber board having grooves. As the cushioning material, polyethylene, polyurethane, polystyrene, vinyl chloride, acrylic, synthetic resin such as SBR, MBR, NBR, rubber-based foam, non-woven fabric, fiber mat and the like are used.

The cushioning material is discarded, and a coating device (roll coater, flow coater,
Curtain coater, spreader, sponge coater,
Apply the adhesive using a spray or the like). Adhesives are synthetic resins such as vinyl acetate resin, urea resin, melamine resin, phenol resin, acrylic resin, polyester resin, polyurethane resin, epoxy resin, polyethylene resin, isocyanate resin, SBR, MBR, NBR, or rubber adhesives. The adhesives are used alone or by optionally modifying them.

Next, a cushioning material is laminated, and hot or cold pressure is applied by using a pressing device (roll press, flat plate press, etc.) to harden the adhesive, and then it is attached. In this way, a decorative veneer is attached to the front surface of the wood fiber board, and a discarding veneer having the same fiber direction as the decorative veneer is attached to the back surface and a cushioning material. A floor board was obtained in which a plurality of grooves were engraved at a pitch of 35 mm or less in the direction orthogonal to the fiber direction of the discarded veneer on the back surface of the wood fiber board.

[0027]

EFFECTS OF THE INVENTION A decorative veneer and a discarded veneer are attached to the front and back of a wood fiberboard, and a plurality of grooves are engraved on the backside in a direction orthogonal to the fiber direction of the discarded veneer at a pitch of 35 mm or less. It is a floor board to which a cushioning material is attached, and the groove acts as a sound absorbing void that absorbs solid propagation sound due to impact from the surface, reduces the rigidity of the wood fiber board itself, absorbs impact and is soundproof Improved. In addition, it is easy to fit with the groundwork and can absorb non-terrain.

The wood fiberboard is a homogeneous material, and even if a groove is formed, the remainder of the wood fiberboard on the groove has a hard layer so that the balance of the thickness is not disturbed and the wood fiberboard absorbs water. Expansion is uniformly generated, and no wavy unevenness is generated on the surface of the groove.

Claims (2)

[Claims] 1. A floorboard in which a decorative veneer is attached to the front surface of a wood fiberboard, and a discarding veneer having the same fiber direction as the decorative veneer is attached to the back surface, and a cushioning material is attached to the floorboard. A floorboard, characterized in that a plurality of grooves are engraved in a direction orthogonal to the fiber direction of the discarded veneer at a pitch of 35 mm or less on the back surface of the wood fiberboard. 2. The floor board according to claim 1, wherein a hard layer having a high specific gravity is provided on at least the surface of the wood fiber board.