JPS5947661B2 - lightweight fireproof panel - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a lightweight fire-resistant panel that can be used as an exterior wall material for buildings and structures, has improved strength and fire resistance, and is also lightweight. It is something.

(Prior Art) Gypsum boards have conventionally been widely used as building material panels.

However, although gypsum board is noncombustible, it has poor insulation properties and has a large specific gravity and is heavy. In addition, the present inventor previously impregnated a honeycomb-shaped formwork formed of either a thin metal plate or asbestos paper with an inorganic material having heat-foaming property between the front surface material and the back surface material made of a thin metal plate. Invented and filed a patent application for a panel in which a foamed inorganic substance is filled into the voids of the formwork and a foamed inorganic substance is filled in the voids of the formwork. However, the strong alkalinity of the impregnated heat-foamable inorganic material caused corrosion and reduced strength. Therefore, regardless of the material of the formwork, it is fireproof,
There was a desire for a panel that could achieve the purposes of heat insulation and soundproofing. (Objective of the Invention) The object of the present invention is to eliminate the above-mentioned drawbacks of panels for building materials, and to provide a lightweight fireproof panel that is strong, has improved nonflammability and soundproofing properties, and is lightweight. It is something.

(Structure of the Invention) The following is an explanatory diagram showing a lightweight fireproof panel according to the present invention using drawings. In FIG. 1, 1 is a surface material formed from a thin metal plate into a gutter shape.

Reference numeral 2 denotes an adhesive which is either organic or inorganic and is used to fix the surface material 1 and the frame 3 together.

To explain further, the frame 3 is made of a noncombustible material such as a thin metal plate or asbestos paper, and has a honeycomb shape having voids 3a as shown in FIG. 2 as an example. Note that its height is equal to or lower than the height of the surface material 1. In particular, the formwork 3 is useful as a reinforcing material and a partitioning material. A plurality of fireproof particles 4 are filled in a part of the gap formed between the surface material 1 and the formwork 3, and a part of the fireproof particles are fixed with the adhesive 2.

To explain further, the granulated fireproofing material 4 contains inorganic particles such as perlite, borax, borates such as sodium metaborate, silicates such as sodium silicate and sodium metasilicate, or secondary
It is impregnated with one or more heated and melted phosphates such as sodium phosphate and sodium metaphosphate, and the outer periphery is coated with an impermeable film. When heated at high temperatures, it starts to expand and expand, forming a dense foam layer with strong fire resistance. 5 is foamed gypsum, and gypsum slurry is poured through the opening of the formwork 3 to fill the void 3. This fills a considerable portion of the

In addition, due to the high viscosity of the gypsum slurry, it is practically impossible to completely fill all the voids in the formwork 3, and some of the voids in the formwork 3 may be left unfilled. In many cases, a void 6 is left, and this figure shows this state. Gypsum slurry is made by adding water to hemihydrous gypsum, adding a water-soluble resin with a hardening agent (for example, urea resin emulsion, etc.) to it, and foaming it by rapidly stirring while blowing gas or adding bubbles. This is what I did. Reference numeral 7 is a backing material which is placed on the surface of the gypsum slurry poured into the gap 6 of the frame mold 3, and is pressed onto the surface by a roll or the like.

The backing material is made of one of asbestos paper, nonwoven fabric such as glass fiber, and synthetic resin film.

The gypsum slurry poured into the formwork 3 generates reaction heat and begins to harden, and after 15 to 20 minutes the shape is completed, reinforced by the formwork, and the constituent materials are integrated. The result is a lightweight fireproof panel. Further, when the surface material 1 side of this lightweight fireproof panel is exposed to high heat, the inside of the panel changes as shown in FIG. 3. That is, the back side of the facing material 1 of the lightweight fireproof panel exposed to high heat is between the back side of the facing material 1 where the granulated fireproofing material existing between the adhesive and the foamed gypsum 5 is foamed, the foamed gypsum 5, and the formwork 3. By sequentially filling the voids surrounded by the inorganic foam with inorganic foam, heat conduction to the back material 7 is suppressed. Note that FIG. 3 shows the middle of this process. (Effects of the Invention) The lightweight fireproof panel according to the present invention exhibits the following effects.

(1) Unlike conventional gypsum boards and the like, it is made from a combination of foamed gypsum, granulated refractory material, and formwork, so it is lightweight and has high mechanical strength.

(2) Lightweight fireproof panels have excellent sound insulation and heat insulation properties. When heated by fire, the granulated fireproofing material foams and fills the unfilled voids in the formwork with fireproof inorganic foam, creating foamed gypsum, etc. Combined with the fire resistance of this material, fire protection and fire resistance are greatly improved.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing a lightweight fireproof panel according to the present invention;
FIG. 2 is a perspective view showing an example of a formwork, and FIG. 3 is an explanatory view showing changes in the structure of a lightweight fireproof panel when the surface material of the panel is exposed to high heat. 1... Surface material, 2... Adhesive, 3... Formwork, 4...
... Granulated fireproofing material, 5... Foamed gypsum, 7... Back material.

Claims (1)

[Claims] 1. A surface material made of a thin metal plate formed into a gutter shape, a formwork made of a thin metal plate fixed to the back side of the surface material via an organic or inorganic adhesive, or asbestos paper formed into a honeycomb shape, and A granulated fireproofing material filled in a part of the gap formed between the formwork and the surface material, foamed gypsum filled in the gap between the top of the granulated fireproofing material and the tip of the formwork, and the foamed gypsum formwork. A lightweight fireproof panel characterized by being integrally formed with a backing material that closes the exposed surface of the panel.