JPS5938101B2 - Sandwich panel containing inorganic granulated refractory material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sandwich panel containing borax, a granulated refractory material having a borax core and an outer periphery coated with water glass, and an inorganic powder.

Conventionally, this type of sandwich panel includes (a) a panel in which only a synthetic resin foam layer is interposed between nonflammable front and back materials, (b) a panel in which an inorganic substance is mixed in the synthetic resin foam layer, and (c) a panel in which an inorganic substance is mixed in the synthetic resin foam layer. ) There are many types of panels, including panels made only of inorganic foam instead of synthetic resin.

However, these panels have various disadvantages; for example, (a) is lightweight but has poor heat resistance and fire resistance, and (b) does not have sufficient fire resistance.

In the case of (c), the fire resistance was excellent, but the mechanical strength (bending, cutting, impact) was lacking. In order to eliminate such drawbacks, the present invention mixes borax and a so-called granulated fireproof material made of borax coated with water glass in the synthetic resin foam layer, and at least We propose a sandwich panel that exhibits excellent fire and heat resistance by mixing and distributing granulated fireproof material, borax, and inorganic porous particles on either side. One embodiment of the sandwich panel according to the present invention will be explained in detail with reference to the drawings below. Figure 1 shows that granulated refractory material and borax are distributed in the synthetic resin foam layer, and the front and back materials are combined. FIG. 2 is a longitudinal cross-sectional view of a sandwich panel in which the granulated fireproof material, borax, and inorganic porous particles are distributed at high density on at least one side between the resin foam layers.

In the figure, 1 is a front material, 2 is a back material, and 3 is a synthetic resin foam layer that binds the front and back materials and forms an intermediate layer of the panel. , 4 is a granulated refractory material with borax as the core, the outer periphery of which is coated with liquid water glass, and dried, the particle size is approximately 0.5 to 5 mmφ, 5 is borax, and 6 is inorganic porous grain. be. To explain in more detail, the surface material 1 is an asbestos cement board or a metal plate, and the back material 2 is a thin metal plate, synthetic resin film, kraft paper, or any other well-known material.

The synthetic resin 3 includes both thermoplastic and thermosetting resins, with the former being polyethylene and styrene resin, and the latter being polyurethane resin and melamine resin. Moreover, the granulated refractory material 4 is made by granulating a core of borax and coating the outer surface with liquid water glass, and then drying the granulated material. When adding the granulated refractory material 4 to the synthetic resin foam layer, refractory materials of various sizes may be mixed, or granulated refractory materials of the same particle size may be used by filtration, etc. You can. However, it is more preferable when the particle sizes are different because foaming occurs in stages from the viewpoint of fire resistance. Further, when these borax and granulated refractory materials are heated to about 160 to 250°C, they gradually foam while releasing crystal water. Moreover, as the inorganic porous grains 6, pearlite grains and granulated 'Z-lite grains are mainly used. Its particle size is usually 1 to 5 aEψ. These inorganic porous particles have high fire resistance and high mechanical strength as the skeleton of the inorganic foam layer formed at high temperatures.
It reinforces the inorganic foam layer. Next, examples of the present invention will be described.

Note that 10 parts by weight of the 50 parts by weight of the granulated refractory material 4, 20 parts by weight of the 50 parts by weight of the borax 5, and 20 parts by weight of the pearlite grains 6 were combined with the surface material 1 and the synthetic resin foam layer. It was installed between 3.

Therefore, other borax, granulated refractory material, and polyurethane resin are mixed with a rotating blade, etc., and the above mixture is laminated on a surface material, such as a color steel plate (thickness: 0.35 ml), and aluminum foil is used as the back material. The plates 2 were laminated and integrated to produce a sandwich panel as shown in FIG. Next, when the surface material 1 side was exposed at right angles to the flame of a Bunsen burner at 900°C, an initial inorganic foam layer was formed on the surface of the polyurethane foam layer at 100°C. In addition, this foam layer melts from the borax near the surface material 1 side, which has a small heat capacity, and exhibits fluidity due to its physical properties with a large amount of crystal water, connecting the pearlite grains 6, and connecting the polyurethane foam layer 3 and the surface material. An inorganic foam layer as described above is formed between the granulated refractory materials 4 having a large heat capacity, and also bridges between the granulated refractory materials 4 having a large heat capacity. Furthermore, when heating continues and it is exposed to a flame of 600°C, the granulated fireproof material 4 on the surface of the polyurethane foam layer melts, and the inorganic foam layer becomes even thicker and has a skeleton of pearlite particles. An inorganic foam layer was formed between the surface material 1 and the combustible polyurethane foam layer. Therefore, the polyurethane foam layer did not emit smoke or catch fire.
As mentioned above, when the sanderch panel according to the present invention is exposed to high temperatures, the granulated refractory material and borax distributed between the surface of the synthetic resin foam layer and the front and back materials gradually foam while releasing moisture. Then, an inorganic foam layer is formed between the synthetic resin foam layer and the front and back materials using inorganic porous particles as cores, and as heating continues, the borax and granulated refractory material in the synthetic resin foam layer release water and the above-mentioned Since the inorganic foam layer is expanded to form a larger inorganic foam layer, it has the characteristic of protecting the combustible synthetic resin foam layer from high temperatures.

Furthermore, Sanderarche panels exhibit almost no dimensional deformation even when exposed to high heat.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing one embodiment of the sandwich panel according to the present invention. 1... Surface material, 2... Back material, 3...
... Polyurethane resin foam layer, 4 ... Granulated fireproof material, 5 ... Borax, 6 ... Inorganic porous grains.

Claims (1)

[Claims] 1 Borax in the synthetic resin foam layer provided between the front and back materials,
A granulated refractory material made of borax coated with water glass is distributed, and the granulated refractory material, borax, and inorganic porous particles are placed at high density on at least one side between the front surface material, the back surface material, and the synthetic resin foam layer. A sandwich panel characterized by a distribution of