JP3101058U - Construction materials - Google Patents

Abstract

【Task】
The present invention is intended to provide a building material that is most suitable for a sill, a door frame, and the like by improving a particle board that can be manufactured at a low cost, improving a wood screw holding force, a bending strength, and the like.
[Solution]
On the front and back surfaces of the core layer obtained by adding the adhesive to the coarse wood chip, the surface layer obtained by adding the wood powder and the adhesive is applied. This is a working material in which 45 to 20% of a hard urethane home powder is bonded with an adhesive to 80% by weight, and an MDF material is layered on the front and back surfaces of the particle board.
[Selection diagram] Fig. 1

Description

TECHNICAL FIELD The present invention relates to a construction material used for an internal construction of a building such as an indoor sill, a Kamoi.

Materials used as internal building materials for conventional buildings include those obtained by laminating and bonding a plurality of veneers (hereinafter referred to as LVL: Laminated Veneer Lumber), and fiberizing wood as a material to produce urea, melamine, and phenol resin. (Hereinafter referred to as MDF: Medium Density Fiber Board; also referred to as medium fiber board), or a composite material (hereinafter referred to as "MDF") in which the surface property is improved by bonding MDF to the surface of LVL. LVX).

However, both LVL and MDF are expensive, and the LVX to which they are bonded is naturally expensive. Therefore, it is desired to provide an inexpensive building material which causes a rise in building costs and a rise in products using the building.

On the other hand, there is a particle board made by mixing, heating, and molding an adhesive such as urea, melamine, and phenolic resin into wood chips (chips). It cannot be used for door frames, etc., and it may have a rough appearance due to the rough surface of the wood and the appearance of irregularities may appear even if a decorative cloth is applied. It is generally used for boards and the like.

  In view of the above, the present invention aims to provide a building material that is most suitable for a sill, a door frame, and the like by improving a particle board that can be manufactured at a low cost, improving a wood screw holding force, a bending strength, and the like.

  The present invention relates to a board obtained by laminating a surface layer containing wood flour and an adhesive on the front and back surfaces of a core layer obtained by adding an adhesive to a coarse wood chip and thermally pressing and drying the board. 45 to 20% of hard urethane home powder was bonded with an adhesive to 55 to 80% by weight with an adhesive and thermocompression-bonded, and wood flour and an adhesive were added to the front and back surfaces of the core layer where the adhesive was added to the coarse wood chip. In a particle board that has been subjected to thermo-compression bonding and drying with a surface layer, 45 to 20% of hard urethane home powder is bonded with an adhesive to at least 55 to 80% by weight of the coarse wood chip of the core layer, and the front and back surfaces of the particle board Has an MDF material layered thereon.

  As an effect of the present invention, existing particle board manufacturing equipment can be provided as it is at a low cost, and it has excellent wood screw holding power, bending strength, etc., and has as little surface irregularity as possible. There is an advantage that even if the makeup is applied, it can be made smooth and can provide a building material that can be used for a dashi, a sill, a door frame, and the like, and that a hard urethane home that is used as a waste material of a building or the like can be reused.

Best mode for carrying out the invention

  On the front and back surfaces of the core layer 2 in which the adhesive is added to the coarse wood chip 1, the surface layer 4 in which the wood powder 3 and the adhesive are added is superimposed and thermocompressed and dried. 45 to 20% by weight of the hard urethane home powder (5) is bonded to 55 to 80% by weight of the coarse wood chip chip (1) with an adhesive, and the MDF 7, 7 material is laminated and bonded on the front and back surfaces of the particle board 6. It becomes.

  If the amount of the coarse wood chips of the core layer 2 is less than 55% by weight and the hard urethane home powder is 45% or less, the woody feeling may be lost, and if it exceeds 80% by weight of the coarse wood chips and less than 20% of the hard urethane home powder. There is a possibility that the rough surface of the wood edge becomes remarkable and the surface of the laminated decorative cloth or the like becomes uneven, resulting in a poor finish, and a weakening of the wood screw holding power. Preferably, the hard urethane home powder (5) is 40 to 30% with respect to the coarse wood chip (1) 60 to 70% by weight.

  The thickness of the particle board 6 in which 35% of hard urethane home powder is mixed with 65% by weight of coarse wood chips is 18 mm, and the thickness of the particle board 6 is the same as that of the embodiment of the present invention in which 3 mm MDF is attached to the front and back surfaces of the particle board 6. Physical properties test results of MDF and LVX of the following are shown in Tables 1 to 5 (Director of Yamagata Prefectural Industrial Technology Center, July 31, 2003, test date: July 16 to 17, 2003). The products of the present invention are indicated as prototypes 1 and 2 (both are circled).

  FIG. 3 is an explanatory sectional view according to the present invention.

Explanation of reference numerals

1: coarse wood chip 2: medium core layer 3: wood flour 4: surface layer 5: hard urethane home 6: particle board 7: MDF

Claims (1)

  On the front and back surfaces of the core layer in which the adhesive is added to the coarse wood chip, the surface layer in which the wood powder and the adhesive are added is superimposed, and in a thermocompression-bonded and dried particle board, at least the coarse wood chips 55 to 55 in the core layer A work material in which 45 to 20% of a hard urethane home powder is mixed with an adhesive with respect to 80% by weight, and an MDF material is layered on the front and back surfaces of the particle board.

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