JPH0712967B2 - Non-combustible wood board manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention is used for an outer wall base, an outer wall material, an interior material, a heat insulating / sound absorbing material, and the like, and has strength, corrosion resistance, sound absorbing property, heat insulating property, and heat absorbing property. The present invention relates to a method for producing a non-combustible wood board which has been improved in order to make the wood cement board having various characteristics of excellent moisture release incombustible.

[Prior Art] Wood cement boards such as conventional wood wool cement boards, wood fiber cement boards, and pulp-mixed cement boards have excellent heat insulating properties, sound absorbing properties, moisture absorbing / releasing properties, bending strength, etc. as building materials. However, regarding fire resistance, it is difficult to make it completely nonflammable because wood wool, wood fiber, pulp, etc. are used as raw materials even if various measures are taken to make it flame retardant. As a legally non-combustible material, its applications and places of construction are limited compared to non-combustible materials.

The only way to make wood cement board non-combustible is to set the mixing ratio of wood materials such as wood wool, wood fiber and pulp in wood cement board to about 35% by weight or less and 10% by weight or less, and a combustion inhibitor, etc. Although it is possible to make wood-based materials non-combustible by using, when the amount of wood-based materials is reduced to such an extent, the excellent properties as a wood cement board, such as heat insulation, sound absorption, moisture absorption and desorption, and light weight are achieved. Since the workability is considerably poor, it is difficult to put it into practical use. For this reason, even if it is a wood cement board with flame retardancy, it is not used at construction sites and its applications where the use of materials that use flammable organic materials is restricted, and inorganic materials are used as non-combustible materials. The use of asbestos cement boards and lightweight cellular concrete panels is inevitable.

[Problems to be Solved by the Invention] However, in the lightweight cellular concrete panel or the like used in the above-mentioned non-combustible material construction site, even if the non-combustible property is excellent, the excellent bending strength in the wood cement board,
It lacks heat insulation, sound absorption, and moisture absorption / release.

Therefore, in the present invention, there is provided a method for producing a non-combustible wood board that leaves the useful and excellent properties of the conventional wood cement board as it is, and further devises incombustibility that was impossible with the conventional technology. The purpose is to do.

[Means for Solving the Problem] The above-mentioned problem is that the wood is soaked in a solution of one or more of an alkali silicate, a hydrate of silicic acid, colloidal silicic acid, and a silicate gel, and then the wood is chopped. A machined wood strip, and a binder such as cement, gypsum, or magnesium carbonate, and one or more of antimony trioxide, lead monoxide, ammonium hydrogen phosphate, and barium sulfate that suppress the burning rate. And one or more of magnesium hydroxide, aluminum hydroxide, borax, gypsum dihydrate, antimony hydroxide, and aluminum phosphate, which is a substance that holds water of crystallization and suppresses the amount of heat generated A non-combustible wood board, characterized by pouring or pressing it into a mold and curing and drying, or wood wool, wood fiber, wood chips, pulp, bamboo. , Wood, which is made of one or more of hemp, etc., is dipped in a solution of one or more of alkali silicate, hydrate of silicic acid, colloidal silicic acid, and silica gel, and then cemented to the wood. Binder such as gypsum and magnesium carbonate, and one of antimony trioxide, lead monoxide, ammonium hydrogen phosphate, and barium sulfate that suppresses the burning rate.
And one or more of magnesium hydroxide, aluminum hydroxide, borax, gypsum dihydrate, antimony hydroxide and aluminum phosphate, which is a substance that holds water of crystallization and suppresses heat generation. This is solved by a method for producing a non-combustible wood board, which comprises depositing a combustion inhibitor, pouring it into a mold or pressure molding, and curing and drying.

[Example] An example of the method for producing a non-combustible wood board of the present invention will be described below.

The drawing shows a non-combustible wood board manufactured by an embodiment of the manufacturing method of the present invention, in which 1 is a non-combustible wood board, 2 is a silicic acid-treated wood strip, and a binder of a hardening agent such as cement is provided on the surface thereof. It has the appearance of being attached and having many pores 3.

In the method for producing the non-combustible wood board 1, first, wood is cut into an appropriate size and made of one or more of alkali silicate, hydrate of silicic acid, colloidal silicic acid, and silicic acid gel. Immerse in the solution. The alkali silicate is sodium disilicate, potassium disilicate, lithium disilicate or the like, and contains a large amount of silicic acid. This silicic acid treated wood is then chopped to form wood strips 2 which are placed in a mixer and mixed with cement and burn suppressing agent.

As the binder, gypsum other than the above cement, magnesium carbonate or the like may be used. As the combustion inhibitor, there are one that suppresses the combustion rate and one that suppresses the amount of heat generation, and antimony trioxide, lead monoxide, ammonium hydrogen phosphate, barium sulfate, etc. are oxygen in the air due to thermal decomposition. Combustion rate is suppressed by combining with it, and magnesium hydroxide, aluminum hydroxide, borax, gypsum dihydrate, antimony hydroxide, aluminum phosphate, etc. cause endothermic reaction due to thermal decomposition and evaporation of crystal water. The latent heat suppresses a temperature rise due to combustion, and an effective combustion suppressing action can be exhibited by combining one or more of each of the combustion rate suppressing substance and the calorific value suppressing substance.

Then, when the cement and the combustion inhibitor are evenly adhered to the surface of the wood piece 2, the wood piece 2 is poured into a mold, or pressure-molded, and then cured and dried to form the non-combustible wood board 1.

The silicic acid compound such as the alkali silicate or silicic acid hydrate, colloidal silicic acid, and silicic acid gel penetrates into the cell walls inside the wood and adheres to the surface, and when dried, it becomes a ceramic with the wood and solidifies as it is. To do. The wood piece 2 made into ceramic by this silicic acid treatment is very similar to the naturally silicified tree, that is, the tree is converted to silicic acid in the ground, and it can be said that it is equivalent in terms of its excellent noncombustibility. Is.

In addition, as another production method, a wood material made of one or more of wood wool, wood fiber, wood chips, pulp, bamboo, hemp, etc. is treated with an alkali silicate, or a hydrate of silicic acid, colloidal silicic acid,
After immersing in a solution consisting of one or more of silica gel, a binder such as cement, gypsum, magnesium carbonate, etc., and antimony trioxide, lead monoxide, ammonium hydrogen phosphate, sulfuric acid that suppresses the burning rate are added to this wood material. One or more of barium and one of magnesium hydroxide, aluminum hydroxide, borax, gypsum dihydrate, antimony hydroxide and aluminum phosphate, which is a substance that retains water of crystallization and suppresses heat generation Alternatively, a plurality of combustion inhibitors may be adhered, which may be poured into a mold or pressure-molded, and then cured and dried.

[Effects of the Invention] As described in detail above, according to the present invention, the conventional wood cement board was never able to obtain incombustibility, but the wood material is treated with silicic acid to be made into ceramic, and thus artificial silicidation is achieved. By making wood, further adding a combustion inhibitor, and hardening it with a binder such as cement, we achieved a temperature of 800 ° C or less for 20 minutes, which is the standard for non-combustible materials under the Building Standards Law, and we were able to obtain non-combustibility. In other words, by converting the wood material itself into a ceramic, the wood material, which is originally flammable, is made into a ceramic with excellent heat resistance and noncombustibility, and further, a noncombustible inorganic cement, a combustion rate suppressing substance, and a calorific value suppressing substance. By adhering with a combustion inhibitor consisting of, even if the mixing ratio of the wood material is about 35% by weight as in the conventional wood cement board, the noncombustibility standard is sufficiently satisfied.

And since there are many pores between the wood materials, it is excellent in heat insulation and sound absorption, and even though it is made into a ceramic, the wood material has moisture absorption and desorption properties because it is porous, and bending strength Also maintains the same characteristics as before.

As described above, the non-combustible wood board can exhibit excellent properties in all of workability, non-combustibility, heat insulation, sound absorption, bending strength, and moisture absorption / desorption due to its light weight.

Therefore, the non-combustible wood board according to the present invention, in addition to the above-mentioned excellent characteristics, can of course exhibit a sufficient safety against fire due to non-combustion, of course, and this safety point makes it impossible to perform the construction work conventionally. It is possible to further expand the uses of the wood cement board in.

[Brief description of drawings]

The drawings are side views showing an embodiment of a non-combustible wood board manufactured by the method for manufacturing a non-combustible wood board of the present invention. 1 ... Non-combustible wood board, 2 ... Silicic acid treated wood strips 3 ... Pores

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location C04B 22/16 A 28/14 28/30 (56) References JP 59-54655 (JP, A) Special features Kai 63-2843 (JP, A) JP 57-47762 (JP, A) JP 59-83974 (JP, A) JP 56-17963 (JP, A) JP 54-23935 (JP) JP, B2) JP 62-13315 (JP, B2)

Claims (2)

[Claims] 1. Wood is dipped in a solution consisting of one or more of alkali silicate or silicic acid hydrate, colloidal silicic acid, and silicic acid gel, and then the wood is carved into wood pieces, and the wood is cut into pieces. Binder such as cement, gypsum, magnesium carbonate, etc., and antimony trioxide that suppresses burning rate,
Magnesium hydroxide, aluminum hydroxide, borax, gypsum dihydrate, hydroxide which is a substance containing one or more of lead monoxide, ammonium hydrogen phosphate and barium sulfate and water of crystallization, which suppresses heat generation. A method for producing a non-combustible wood board, which comprises depositing a combustion inhibitor comprising one or more of antimony and aluminum phosphate, pouring it into a mold or press-molding it, and curing and drying it. 2. A woody material composed of one or more of wood wool, wood fiber, wood chips, pulp, bamboo, hemp, etc., selected from alkali silicates, hydrates of silicic acid, colloidal silicic acid and silica gels. Or, after immersing in a solution composed of a plurality of materials, a binder such as cement, gypsum, or magnesium carbonate is added to the wood material, and one of antimony trioxide, lead monoxide, ammonium hydrogen phosphate, and barium sulfate that suppresses the burning rate.
And one or more of magnesium hydroxide, aluminum hydroxide, borax, gypsum dihydrate, antimony hydroxide and aluminum phosphate, which is a substance that holds water of crystallization and suppresses heat generation. A method for producing a non-combustible wood board, which comprises depositing a combustion inhibitor, pouring it into a mold or press-molding it, followed by curing and drying.