JPH04115084A - Fire door - Google Patents

Abstract

PURPOSE:To improve the heat resistance and water resistance by using a complex material made by forming a metallic film layer on the surface of a wooden chip plate which is made by glued-forming and incorporating chips through an adhesive, making the metallic film layer as the front side plate, so as to form a fire door. CONSTITUTION:Wooden chips are obtained by cutting a needle-leaved wood or a broad-leaved wood. Then an incombustible inorganic compound is filled in clearances of cell holes, capillary tubes, and the like of the chips, or the incombustible inorganic compound is fixed or attached in layers along the inner walls of the cell holes, and furthermore, the incombustible inorganic compound is fixed or attached also to the periphery of the wooden chips. Then the wooden chips are formed into a specific thickness of wooden chip mat. Then, a thermo-compression process is applied to the wooden chip mat to produce a chip plate. Furthermore, a molten metal is thermo-sprayed on the surface of the chip plate to form a metallic film. And by using the metallic film layer as the front side plate, a fire door can be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a fire door, and more particularly to a fire door using a composite material comprising a metal coating layer formed on a wood chip board as a face plate.

<Prior art and its problems> It is mandatory to use fire-proof doors for fire protection and prevention of fire spread at the entrance doors of rooms in hotels, condominiums, etc. These fire doors are generally made of metal such as aluminum or steel, and are extremely effective in achieving the objectives of fire prevention and prevention of fire spread.

However, although these metal fire doors can avoid the spread of fire, they have had the serious problem of becoming warped and deformed by the high heat that accompanies a fire, making it difficult to open and close the door.

Furthermore, since the door is made of metal, it has problems such as a loud metallic sound when opening and closing the door, a cold feel to the touch, and poor insulation properties.

On the other hand, in JP-A-50-12948, a metal or alloy having a melting point of 900°C or less is thermally sprayed onto the surface of a base board such as hardboard, plywood, wood, slate, ceramics, etc. A technique for obtaining a heat-resistant board by thermally spraying a metal or alloy having a melting point of ~1600°C has been disclosed. This conventional board is thermally sprayed in two layers, and is said to have excellent heat resistance and water resistance. However, if the base material is organic such as hardboard, plywood, or wood, metal Under the influence of heat transmitted through the layers, the base material itself gradually deteriorates or becomes carbonized, and there is a risk that it will eventually catch fire. For this reason, it has been impossible to use it as a material for fire doors.

Means for Solving the Problems> Therefore, the present invention basically involves conducting various studies on fire prevention doors using wood materials, developing a new composite material, and providing a fire prevention door using this composite material as a surface plate. This is what led to this.

That is, the present invention provides wood chips in which a noncombustible inorganic compound is filled, attached, or fixed in the cell pores of the present chips and/or on the inner wall surface of the cell pores and/or on the outer periphery of the wood chips. The substrate is a wood chip board formed integrally by adhesive molding via an adhesive substance mixed with a nonflammable inorganic compound that is the same as or different from the nonflammable inorganic compound, and at least one surface of the substrate is coated with a metal coating layer by a thermal spraying method. By cutting the formed composite material using the metal coating layer cutting device, wood chips in the form of chips, flakes, strands, etc. are obtained.

The obtained wood chips are washed with water if necessary, and then dried using a drying device.

A nonflammable inorganic compound is filled into the voids such as cell pores and conduit pores of the dried wood chips, or the nonflammable inorganic compound is fixed or attached in a layer along the inner wall of the cell pores, and then the main cutting is performed. Nonflammability treatment is performed by fixing or adhering the nonflammable inorganic compound to the outer periphery of the piece. This nonflammability treatment can be performed, for example, by the following steps. That is, the present chip is sufficiently immersed in an aqueous solution of a water-soluble inorganic salt (hereinafter referred to as the "first solution") to impregnate it. At this time, it is effective to forcibly accelerate the impregnation treatment by applying reduced pressure or increased pressure. As the first liquid, MgCl2. MgBr2゜Mg SO
4.H2O, Mg(NO3)2.6H20, AlClI
3゜Δ1Br3. A/2 (SO4)3. Aff(NO3
) 3.9H20°CaCA'2. CaBr2. Ca(
NO3)2. ZnC1!2BaC7!2・2H20,B
aBr2. This fire door is characterized in that it is used as a surface plate on at least one side so that water such as Ba(NO3)2 is on the surface.

The structure of the fire door according to the present invention is the same as that of a general door, and suitably decorated surface plates are attached to the front and back sides of the core material assembled into the stile, or a honeycomb core or core root is provided within the stile assembly. It consists of a surface plate attached to the front and back sides.

The face plate on at least one side of the fire door of the present invention is
This wood chip in which a nonflammable inorganic compound is filled, attached, or fixed in the cell pores of the wood chip and/or on the inner wall surface of the cell pore and/or on the outer periphery of the wood chip is made of the same nonflammable inorganic compound as the above-mentioned nonflammable inorganic compound. Alternatively, a particle board formed by adhesive molding and mounting through an adhesive substance mixed with a different nonflammable inorganic compound is used as a substrate, and a metal coating layer is formed on at least one surface of the substrate by a thermal spraying method. It is a composite material made of

The wood chip board used in this composite material is obtained as follows. First, for example, a chipper, a flaker, or the like solution is exemplified for pine, cedar, cypress, and other hardwoods, or lauan, capor, chestnut, poplar, and willow, and other hardwoods. After impregnating with the first liquid, the liquid is removed, and the wood chips are dried to bring the surface to a dry state or an absolutely dry state, and if necessary, component crystals of the first liquid deposited on the surface are removed. Next, a compound liquid (hereinafter referred to as "second liquid") that reacts with the first liquid to produce a water-insoluble, nonflammable inorganic compound is added to the blender.

The second liquid is impregnated into the wood chips by adding and mixing them with a spray or the like or by dipping them into the wood chips. 1st
As in the case of the liquid, impregnation of the second liquid into the wood shavings can be promoted by vacuum or pressure treatment. Second
As a liquid, Na2CO3, (NH4)2CO3, H2
S04Na2S04. (NH4)2S04. H2PO4
+Na2HPO4, (NH4)2HPO4, H3BO3
Examples include NaBO2, NH<BO2, etc. By applying and impregnating the second liquid, the first liquid and the second liquid react in the wood shavings, and a nonflammable inorganic compound is generated. Nonflammable inorganic compounds produced include carunium compounds such as magnesium phosphate, calcium phosphate, ni(lium phosphate, aluminum phosphate, magnesium borate, magnesium carbonate, calcium carbonate, zinc phosphate, barium carbonate, calcium nitrate, barium nitrate, etc.) Examples include magnesium compounds, aluminum compounds, barium compounds, lead compounds, zinc compounds, silicic acid compounds, etc.After the reaction is completed, the liquid is removed and dried.Since this nonflammable inorganic compound is water-insoluble, after drying, It fills, adheres, or adheres to the inside of the cell pores of the wood chips or the inner wall surface of the cell pores and the outer periphery of the main particle.Thereby, even if the cell wall of the outer periphery of the main particle contains cracks or fissures. , the nonflammable inorganic compound is present in a form that blocks or fills this.

It is preferable that the nonflammable inorganic compound be mixed in at a ratio of 33% or more by weight based on the main shavings, and if it is less than this, sufficient fire protection performance cannot be obtained. Further, in order to increase the reaction efficiency of the first liquid and the second liquid, it is preferable that the addition and mixing of the second liquid is carried out under a heated atmosphere, particularly at a temperature of 40°C or lower, more preferably 509°C or higher. Alternatively, the first liquid and the second liquid may be heated and the particles are immersed therein, or the first liquid and the second liquid may be collected, dried and sieved as necessary, and then the adhesive substance can be added. May be mixed with

After cutting the obtained particle mat to a specified length, it is inserted into a hot press and hot-pressed to obtain a wood particle board. The moisture content of this particle board is preferably 20% or less. The reason for this is that if the moisture content is 20% or more, the internal water on the sprayed surface side will evaporate and move to the opposite side due to the influence of heat during metal spraying, causing an internal balance to be disrupted. This is because the wood chip board itself tends to warp with the sprayed surface side concave.

After sanding the surface (the side on which the metal coating layer will later be formed) of the resulting particle board as necessary, a necessary amount of molten metal is sprayed using a thermal sprayer. Metal spraying can be carried out to cover not only the front surface of the particle board, but also necessary locations such as the back surface, butt surface, and the entire surface. It is preferable that the temperature of the surface of the wood particle board to be subjected to metal spraying is 40 to 100°C, and from this point of view, the temperature of the surface of the wood particle board to which metal spraying is performed is preferably 40 to 100°C. If ultrasonic waves or mechanical vibrations are applied when the board is immersed, diffusion and reaction into the wood chips will be facilitated. Note that the order of treatment with the first liquid and the second liquid is not limited, and it is of course possible to perform the treatment with the second liquid first.

The wood shavings that have been rendered incombustible in this way are put into a mixing device,
Add and mix adhesive, sizing agent, etc. and stir to adhere. Next, the wood chips are blown with air, and a continuous wood chip mat of a constant thickness is formed on a conveying device using a forming device. One or more kinds of noncombustible inorganic compounds are mixed into the adhesive substance used to form and integrate the noncombustible wood chips. The nonflammable inorganic compound mixed into the adhesive substance may be the same or different from those produced by the reaction with the first and second liquids, but for example, If treatment with a liquid is performed first, an excess of nonflammable inorganic compounds will be precipitated in the treatment tank for the first liquid, so it is efficient and economical to collect this and mix it into the adhesive material. .

Alternatively, it is preferable to perform metal spraying after warming the temperature of the surface on which the extra noncombustible metal-free coating layer that is deposited during drying after the nonflammability treatment is formed. If the temperature is below 40°C, the sprayed molten metal will immediately cool and solidify, so that the adhesion force due to the anchoring effect to the coated surface of the particle board will not be sufficiently exerted. Further, if the temperature is 100° C. or higher, the temperature effect of the molten metal is strong, degrading the surface of the wood chip board and reducing the adhesion. Metal alloys such as tin, lead, zinc, copper, brass, bronze, aluminum, nickel, iron, and stainless steel are preferably used as the metal to be thermally sprayed. As the thermal spraying method, any of the commonly used electric wire spraying method, gas wire thermal spraying method, and powder spraying method may be employed. The sprayed metal is solidified by subsequent cooling, and a metal coating layer is formed in close contact with the surface of the wood chip board.

Effects> This is a fire door that uses a composite material, whose heat resistance is improved by a metal coating layer formed on the surface of a wood chip board, as at least one side surface plate. This particle board is made by filling, adhering, or fixing a nonflammable inorganic compound into the cell pores of the wood particles, the inner wall surface of the cell pores, or the outer periphery of the wood particles. Since the adhesive material used to form the single sheet is also mixed with a non-combustible inorganic compound to make it non-combustible, it will not deteriorate or carbonize even when heat is transmitted through the metal coating layer.

<Example> Chip-shaped wood shavings obtained by putting radiata pine logs into a chipper were put into a drying device and dried, and then immersed in an aqueous solution containing barium chloride as the main component for 20 minutes under reduced pressure.
After the diffusion treatment, centrifugal dehydration treatment was performed. Next, the wood chips are immersed in an aqueous solution containing ammonium phosphate as a main component for 20 minutes under reduced pressure to react with barium chloride, thereby removing the inside of the cell pores of the wood chips or the outer periphery of the wood chips. A flame retardant treatment was carried out to fill or adhere a nonflammable inorganic compound consisting of water-insoluble barium phosphate and barium hydrogen phosphate to the tube, followed by a centrifugal dewatering treatment.

The moisture content of the wood chips was then adjusted to 7% by hot air drying. The fire prevention door of the present invention produced by this flameproofing treatment uses a composite material with improved heat resistance by forming a metal coating layer on the surface of the wood chip board as at least one side surface plate, so it is different from the conventional metal fire prevention door. Disadvantages of doors can be eliminated. The composite material has excellent heat resistance and water resistance due to the metal coating layer formed on the surface of the particleboard, and the base material, wood fiberboard, has been sufficiently treated to make it non-combustible. It does not deteriorate or become carbonized due to heat transferred through the layer, and there is no risk of ignition over a long period of time.

Claims (1)

[Claims] (1) Inside the cell pore and/or inner wall surface of the cell pore and/or
Or a wood chip whose outer periphery is filled with, adhered to, or fixed with a nonflammable inorganic compound through an adhesive substance mixed with a noncombustible inorganic compound that is the same as or different from the above noncombustible inorganic compound. The substrate is a wood chip board that is integrated with adhesive molding.
A fire prevention door characterized in that a composite material comprising a metal coating layer formed by a thermal spraying method on at least one surface of the substrate is used as at least one side surface plate so that the metal coating layer is on the surface.