JP2006231885A - Core material for building material using processed material of albizzia falcataria that is planted tree of pea family - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a core material for a building material for conserving forests and achieving inexpensive and sustainable supply by using a processed material of albizzia falcataria, which is strong and hard to break, and capable of securely holding nails or screws by using an adhesive. <P>SOLUTION: The albizzia falcataria, a planted tree of a pea family, which grows to a mature tree in five or six years, is used for core material for a building material. Dried albizzia falcataria wood is not used as it is, but used as a processed material such as a plywood, a veneer board or a laminated lumber, or a block material formed by laminating the laminated lumber with a plywood, a particle board, a fiber board or the like. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

    The present invention relates to a core material for building materials used for pillars, fences, and the like, which is made from a processed material of Falcata, which is a plantation tree of the leguminous family.

    Conventionally, core materials for building materials have been made of fast-growing materials such as Southern plywood such as Lauan, single-ply laminated material and fiberboard, Radiata pine and cedar, and Falcata.

This has the following problems.
B) The use of southern seawood such as Lauan often led to the destruction of forests, which are the source of carbon dioxide. B) The price of radiata pine imported mainly from the Southern Hemisphere fluctuated greatly. C) The desiccant of Falcarta is characterized by its very low specific gravity, but it has the disadvantages that it is easy to break and the holding power of nails and screws is very small.
The present invention has been made to eliminate the above problems.

A) Forest destruction can be reduced by using the fast growing Falcata, which is a leguminous plantation tree, instead of a broad-leaved tree of southern seawood or a conifer such as pine or cedar. B) By using a falcater of about 5-6 years to become a mature tree, cheap and sustainable supply can be achieved. C) Instead of using the dried Falcata material as it is, if it is processed into a plywood, single-ply laminate, laminated laminate, or laminated material and plywood, block material laminated with particle board, fiberboard, etc. The strength is increased and it is difficult to break, and the use of an adhesive or the like increases the holding force of the nail or screw.
As described above, it is a building material core material using a processed material of Falcarta.

    The specific gravity of Falcarta is very light, and when used as a core material for building materials as it is, it easily breaks and the holding power of nails and screws is weak. Therefore, a) A Falcata veneer is obtained from a Falcata log using a cutting machine. After the veneer is artificially dried, it is laminated so that the grain direction of this Falcata veneer is alternately almost perpendicular to obtain a plywood. This plywood is cut into arbitrary dimensions to obtain a building material core. B) Laminate each Falcater veneer so that the grain direction of each veneer is almost parallel to obtain a veneer laminate, and cut the veneer laminate into an arbitrary size to obtain a building material core. C) Laminating Falcarta laminated plates to obtain a laminated laminated material, and cutting the laminated laminated material into an arbitrary size to obtain a core material for building materials. D) A block material is obtained by laminating a plywood, a particle board, or a fiber board between or on the surface of the Falcarta laminated plates, and the block material is cut into an arbitrary size to obtain a core material for building materials.

    Usually, the length of the core material for building materials is about 1.8 m to about 2.4 m. On the other hand, the length of a log cut out from a plantation before cutting is usually about 1.3 m, and at most about 1.9 m, it is rare. Therefore, in order to obtain the length dimension of the Falcarta veneer, the veneer, finger joint, or scarf joint is used to obtain a sufficiently long veneer. When laminating these Falcarter single plates obtained by joining, the joints should not be overlapped at the same place. In particular, in the case of spliced joint, the strength decreases when the joints are adjacent to each other, and therefore, the joints are laminated so as to be random. On the other hand, when the laminated plates are laminated, a plywood, a particle board, or a fiber board is sandwiched between the surface and an arbitrary place and laminated together to obtain further strength.

B) Recently, the unidirectional increase in carbon dioxide (CO2) in the atmosphere has become a major cause of global warming, which destroys the global environment. And the reduction has become an urgent task. On the other hand, Falcata is a high-growth leguminous plantation tree with the world's fastest growth record, with a trunk diameter of about 50 cm in about 5-6 years. In this way, the use of Falcata, which is a very fast-growing plantation tree, circulates carbon dioxide in a short period of time and does not increase unidirectionally into the atmosphere.
B) Because it is a fast-growing plantation, price fluctuations are small and stable supply is possible.
C) Because the specific gravity is very light, workability on site is very good.
From the above three points, it is considered that the core material for building materials of processed materials using Falcarta which is a 100% plantation material of the present invention has great industrial applicability.

  It is a perspective view of an example of the present invention using a Falcater plywood.   It is a perspective view of an example of the present invention using a Falcata veneer laminate.   It is a perspective view of an example of the present invention using a laminated laminated material of a Falcata laminated board.   It is a perspective view of an example of the present invention using the block material which laminated the Falcata laminated board and the plywood, the verticle board, the fiber board, etc.

Explanation of symbols

1 Falcarta veneer with wood grain in the length direction 2 Falcarta veneer with wood grain in the width direction 3 Scarf joint part 4 Falcata laminated board 5 Plywood, hard board, fiber board, etc.

Claims (5)

    A core material for building materials using processed material of Falcata, which is a plantation tree of legumes.     Core material for building materials using Falcata plywood.     A core material for building materials that uses Falcata veneer laminates.     A core material for building materials that uses laminated laminates of Falcarta laminated lumber.     A core material for building materials using a block material in which Falcarta laminated lumber and plywood, particleboard, fiberboard, etc. are laminated.

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