JPS586707B2 - Fire door construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for constructing a fire door that exhibits excellent fire resistance, vibration resistance, and corrosion resistance using a foamable inorganic composition. invented a door with fire-retardant properties in which a room-temperature foamable insulating material made of inorganic material is injected into the hollow part of the door panel as a core material and then foamed and hardened, or when manufacturing such a door, a sheet-like base conditioning material is placed on the back of the door panel in advance. This relates to a fire door construction method.

As already detailed in the previous invention, the present inventors have continued to study the possibility of forming a gypsum board or other lightweight inorganic board material as a core material inside the door panel.
Fundamentally, no definitive solution could be found from the viewpoints of workability and heat insulation.

However, as a result of continuing research into inorganic foam insulation materials that can replace polyurethane foam, which inherently has excellent heat insulation properties, we have filed a patent application No. 51-55928 for the use of the foam insulation material of the present invention described below. stated.

That is, in Japanese Patent Application No. 51-55928, the foamable heat insulating material of the present invention was simply injected as a core material into the hollow part of the door panel and foamed and hardened. There were some problems in terms of adhesion, corrosion resistance, etc. when poor plastic plates and iron plates, steel plates, etc., which cause rust, were used.

Therefore, as a result of further investigation into the method of using the foamed heat insulating material of the present invention in the hollow part of a door, we found that after a sheet-like base conditioning material was attached to the back side of the door panel in advance, the foamed heat insulating material of the present invention was injected and foamed. Created a method for constructing fire doors by curing them.
This work has succeeded in correcting the various shortcomings of the prior art and in addition, developing a door that has physical properties such as vibration resistance and corrosion resistance.

The foamable heat insulating material described in the present invention is prepared by the following method.

That is, (a) the ionization constant (pKa) at 25°C is 4.
(b) at least one basic powder selected from anhydrous alkali silicates and cement materials; (c) a metal blowing agent; and (d) silica gel, zeolite, By mixing at least one foaming stabilizer selected from carbon black, activated carbon, talc and mica into a paste and operating the paste according to the method of the present invention, a heat insulating material having inorganic heat insulating properties can be obtained.

This foam insulation material essentially has uniform closed cells with a size of 0.5 to 10 mm, although it varies depending on the manufacturing method, and has low specific gravity, high strength, and is waterproof, water resistant, and chemical resistant. It exhibits excellent properties such as heat resistance, heat insulation, and flame resistance.

The present applicant has already published Japanese Patent Publication No. 55-32669 and Japanese Patent Application Laid-open No. 52-81325 regarding the manufacturing method of the foamable heat insulating material.
Publication No. 55-4709, Japanese Patent Publication No. 52-8
1327 and Japanese Patent Publication No. 55-4708, so we will only briefly mention them here in the examples, but in addition to the above four ingredients, gypsum, silica powder, fly ash, glass can be used as fillers or extenders. Fibers, carbon fibers, etc. can be mixed.

Next, the sheet g base conditioning material in the present invention is a sheet-like material such as corrugated paper, kraft paper, high-quality paper, asbestos paper, woven fabric, non-woven fabric, etc., and has good adhesion to the foamed heat insulating material of the present invention. Any of them can be used effectively.

The fire door construction method of the present invention will be explained with reference to FIG.
When injecting the sheet material 1 in advance into the hollow part 3 of the steel door panel 2 attached to the back surface via the adhesive 6, the foamed heat insulating material 4 of the present invention is mixed to form a paste, and this paste is poured into the hollow part 3 of the steel door panel 2 attached to the back surface through the adhesive 6. Inject the blended amount adjusted to the foaming ratio.

FIG. 2 shows a drawing in which the foamed heat insulating material forms a foamed body 5 throughout the hollow portion 3. FIG.

Note that FIGS. 1 and 2 show a door consisting of a single panel.

The invention is of course capable of other than single-panel doors, and the connections between the panels can be made in any desired manner.

Examples are shown below.

Example A foamable heat insulating material was prepared as follows, and first, the prisoner component and (B)
Separate into components.

(A) Ingredient 100 parts by weight of primary aluminum phosphate (solid content 50%) (B) Ingredient anhydrous sodium silicate No. 2 60 parts by weight Fine aluminum powder 4 parts by weight Fine activated carbon powder
20 parts by weight Glass fiber 1 part by weight Meanwhile, as shown in FIG. 1, the above-mentioned prison component and component (B) were mixed and stirred on a steel door panel with asbestos paper attached to the back side in advance to form a paste. Inject into the hollow part of the door panel as quickly as possible.

After several minutes, the foamable heat insulating material gradually generates bubbles and expands over the entire hollow space until the hollow space is completely filled.

Doors manufactured in this way have strong properties against vibrations and impacts because the foam insulation material adheres well to the inside of the door panel due to the sheet-like base conditioning material being attached to the back side in advance. In addition to this, it was surprisingly found that the adhesive layer and asbestos paper layer were also effective in preventing corrosion.

Of course, since it is inorganic, it has excellent heat resistance, but even more surprisingly, it has been found to have great fire resistance, and it has been confirmed that it has extremely good fire prevention performance because it has excellent heat insulation properties. It was done.

Furthermore, it was confirmed that the continuous insulation properties of the boundary part 7 between the steel plate 2 and the foam insulation material 5 in FIG. This is presumed to be because the base conditioning material was attached to the back surface, which allowed it to adhere better to the steel plate, and the air bubbles in the heat insulating material were evenly dispersed all the way to the boundary.

[Brief explanation of the drawing]

In the drawings, Fig. 1 is a cross-sectional view of the foam of the present invention made into a paste and injected into the hollow part of the door panel, and Fig. 2 is a cross-sectional view of the foam of the present invention cured and filled into the entire hollow part of the door panel. shows.

Claims (1)

[Claims] 1 (a) Ionization constant (pKa) at 25°C is 4.0
(b) at least one basic powder selected from anhydrous alkali silicates and cement materials; (c) a metal blowing agent; and (d) silica gel, zeolite, A foaming composition consisting of at least one foaming stabilizer selected from carbon black, activated carbon, talc, and mica is mixed into a paste and injected into the hollow part of the door panel for foaming and hardening. A method of constructing a fire door, which is characterized by applying adjustment material.