JP2002036213A - Core material board and finish material using the core material board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably feed a core material board and a finish material using the core material board at a low cost by lessening a use amount of wood. SOLUTION: Singly a rice straw piece or both of a barley straw piece and the rice straw piece 2 are coagulated by a binder 4, or a mixture wherein those and a wood chip or a wood fiber 3 is solidified by the binder 4 to form the core material board.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core board used for interior materials and furniture of buildings, fittings, automobiles and the like, and a finishing material using the same.

[0002]

2. Description of the Related Art Finishing materials are often produced by bonding a surface decorative material to a wood board such as plywood. In recent years, major producers of southern timber have tightened timber logging regulations to halt the destruction of tropical forests. for that reason,
The price and supply of plywood have become unstable, and the need for replacement with particle board, wood fiber board and the like has increased.

[0003]

Recently, there has been a shortage of wood-based chips that also use particle boards and the like, and prices have been rising. Further, in order to prevent deforestation, it is necessary to further restrict the cutting of timber. Therefore, there has been a demand for an alternative core material board in which the amount of used timber is reduced.

Accordingly, an object of the present invention is to provide a core board in which the use of wood is reduced and a finishing material using the core board.

[0005]

In order to achieve the above-mentioned object, the present invention comprises a method of solidifying rice straw pieces with a binder, or a method of solidifying both wheat straw pieces and rice straw pieces with a binder. Further, a mixture obtained by mixing wood-based chips or wood-based fibers with these is solidified with a binder. In addition, the finishing material of the present invention, a prepreg sheet is superimposed on one side of a core material board obtained by solidifying a rice straw piece alone or a mixture of wheat straw piece and rice straw piece and a woody chip or fiber with a binder, The decorative material is overlapped on the prepreg sheet and hot pressed.

[0006]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0007] Rice straw pieces 2 and wood chips (wood fibers) 3
FIG. 5 is an enlarged view of a mixture obtained by solidifying a mixture mixed with a binder 4 with a binder. Both wheat and rice straw pieces may be used. As the binder 4, diphenylmethane diisocyanate,
One or a mixture of two or more of melamine resin, urea resin, phenol resin, epoxy resin, and urethane resin is used. To harden a mixture of rice straw pieces 2 and wood chips 3 (further straw pieces may be added) with binder 4
An ordinary particle board manufacturing method can be applied.

FIG. 2 shows a finish using the core board 1.
Shows materials and heat cures to sheet base material such as paper, woven fabric, non-woven fabric
In a semi-cured state impregnated with a thermoplastic resin or a thermoplastic resin
The prepreg sheet 5 is overlaid and the prepreg sheet
It is made by overlaying cosmetic material 6 on 5 and hot pressing
is there. The prepreg sheet 5 is a sheet as shown in FIG.
It is obtained by impregnating the substrate 20 with the resin solution 10. Sheet
Gypsum board paper, kraft paper, rayo
In addition to the use of paper such as paper, organic fiber fabrics,
Fiber, carbon fiber, inorganic whisker, rock fiber
ー, woven fabric of inorganic fiber such as rock wool, amorphous gold
A woven fabric such as a genus fiber can be suitably used. Also, sheet base
Nonwoven fabric used as 20 is glass fiber, cotton, rayon
And / or intertwining the raw fibers such as
Using mechanical, chemical, thermal or solvent
Seas made by methods or their combinations
Can be used. 3-50 as a fiber raw material
wet cut paper or dry non-woven fabric
Matting by manufacturing method and binding with binder resin
What has been used can be suitably used. As a fiber material,
Fiber alone, glass fiber and alumina fiber, aluminum fiber
Inorganic fibers such as minasilica fiber, carbon fiber, and metal fiber
, Aramid fiber, rayon fiber, vinylon fiber, nylon
Fiber, polyester fiber, polypropylene fiber,
Organic fiber such as polyethylene fiber alone or mixed
Can be used. The basis weight of the sheet substrate 20 is 10
~ 1000g / m^TwoIt is preferable that Even more preferred
New basis weight is 50-250g / m^TwoIt is. In addition, resin melt
Reaction of phenols and aldehydes as liquid 10
Can be suitably used. This
A phenolic resin such as
~ 500g / m^Two, Preferably 150 to 350 g / m ^Two
Impregnated so that 50g / m^TwoLess than enough
Difficult to develop scratch resistance, 500g / m^TwoIf not
It takes a long time to cure, and there is also a problem with the appearance such as protrusion from the end.
The title arises. For example, fiber diameter 10 μm, short fiber and long fiber
Basis weight of 100 g / m composed of mixed fibers of^TwoSingle glass fiber
The German thing is made into the sheet base material 20, and this sheet base material 20
Impregnated with 40% solids aqueous dispersion phenolic resin
200g / m^TwoWhen
This is dried at 105 ° C. for 10 minutes to leave a semi-cured state.
That is, a sheet in a prepreg state can be obtained. Conversion
As the cosmetic material 6, a veneer veneer was used. Core board 1 is also available
The cosmetic material 6 also allows resin impregnation.

As the decorative material 6, printing paper or vinyl chloride sheet can be used in addition to a wooden veneer. Further, the decorative material 6 made of these materials can be bonded to the core board 1 using one or more of vinyl acetate, melamine resin, urethane resin, epoxy resin, and urea resin.

Further, a finishing material can be formed by laminating at least one of a plywood, a wood fiber board, a particle board, a wafer board, an OSB, a resin film, and a resin plate on at least one surface of the core board 1.

A finishing material is manufactured by using a core board 1 made of rice straw pieces 2 having a thickness of 12 mm and a plywood having the same thickness as a finishing board. Test) and hardness were observed and measured. The results are shown in Table 1 below.

[0012]

[Table 1]

[0013]

As described above, the core board of the present invention comprises a piece of rice straw alone or a piece of wheat straw and a piece of rice straw fixed with a binder, and further comprises a wood chip or a wood fiber. The mixture obtained by solidifying the mixture with a binder reduces the amount of wood used, and can be supplied stably at low cost. In addition, a finishing material obtained by laminating a plywood or the like to the core board, a finishing material obtained by bonding a decorative material with vinyl acetate or the like, and a sheet material were impregnated with a thermosetting resin or a thermoplastic resin to be in a semi-cured state. By superimposing a prepreg sheet, superimposing a decorative material on the prepreg sheet, and hot-pressing the resulting material to obtain a finished material, it is possible to provide a material having excellent strength and scratch resistance.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view showing a preferred embodiment of the present invention.

FIG. 2 is a sectional view of a finishing material.

FIG. 3 is a diagram illustrating a method for manufacturing a prepreg sheet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Core material board 2 Wheat straw piece or rice straw piece 3 Wood chip or wood fiber 4 Binder 5 Prepreg sheet 6 Cosmetic material

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) B32B 5/02 B32B 5/02 A 33/00 33/00 F term (Reference) 2B200 AA01 BA01 BB01 BB15 BB20 CA15 DA23 DA27 EA06 EC18 EE13 EF11 FA24 FA31 HA03 HA05 2B250 AA01 AA11 AA13 AA31 BA09 CA11 DA04 EA02 EA13 FA21 FA31 FA37 2B260 AA07 AA20 BA01 BA07 BA18 BA19 CB01 CB04 CD02 CD06 CD10 CD30 DA01 DA02 DA03 DA04 DA05 DA02 EAEB EB02 DD02 AK01B AK01D AK15D AK22G AK33A AK36A AK36G AK51A AK53A AK53G AP01D AP02D AP03D AR00C AT00C BA03 BA10A BA10C CB00 DG01A DG10D DG11B DG15B DH00A DH01B EJ82B GB07 GB08 GB08 GB08 GB08

Claims (7)

[Claims] 1. A core board made by hardening rice straw pieces with a binder. 2. A core board comprising both wheat straw pieces and rice straw pieces hardened with a binder. 3. A core board comprising a mixture of a rice straw piece alone or a mixture of both wheat straw pieces and rice straw pieces mixed with wood chips or wood fibers with a binder. 4. The method according to claim 1, wherein any one or a mixture of two or more of diphenylmethane diisocyanate, melamine resin, urea resin, phenol resin, epoxy resin and urethane resin is used as the binder.
4. The core board according to any one of claims 3 to 3. 5. A semi-cured state by impregnating one side of the core board according to any one of claims 1 to 4 with a thermosetting resin or a thermoplastic resin on a sheet base material such as a woven fabric or a nonwoven fabric. Finished material obtained by laminating prepreg sheets, and overlaying a decorative material on the prepreg sheet and hot pressing. 6. A core material board according to any one of claims 1 to 4, wherein a decorative material selected from a wood veneer, a printing paper and a vinyl chloride sheet is coated on one surface of the core material board with vinyl acetate, melamine resin, urethane. A finishing material bonded by using one or more of a resin, an epoxy resin, and a urea resin. 7. A plywood, a wood fiber board, a particle board, a wafer board, and an OSB on at least one surface of the core board according to any one of claims 1 to 4.
(Oriented strand board), a resin film, a finishing material obtained by laminating at least one of a resin plate.