JPS6316730Y2 - - Google Patents

Description

[Detailed description of the invention] This invention has excellent heat insulation and weather resistance due to the low thermal conductivity of the synthetic resin foam layer, low light transmittance and high reflection of radiant heat of the aluminum foil, waterproof properties due to the asphalt felt, This invention relates to a construction board that has improved flame retardancy by interposing a heat-resistant coating layer, has strengthened mechanical strength by integrally sandwiching a synthetic resin foam layer with plywood and a radiant heat reflective layer, and is also lighter than before.

In building materials, such as interior materials, exterior materials, and underlayment materials, materials that combine multiple functions such as heat insulation, weather resistance, waterproofing, and mechanical strength are the most desirable ideal building materials. However, no building materials that combine such functions have appeared to date. However, due to rapid advances in technology related to polyurethane resins and phenolic resins, for example, they can now be used as core materials for building materials. As a result, polyurethane resins and the like can bond other components at once and form foams with closed cell structures in a short time, so-called polyurethane foams, polyisocyanurate foams, and phenolic foams, making it extremely easy to form composites that are super heat insulating, moisture-proof, waterproof, chemical-resistant, flame-retardant, and other properties. However, these foams themselves have the disadvantages of poor weather resistance (sun radiation) and mechanical strength. Therefore, when using the above-mentioned synthetic resin foams in the building field, they can only be expected to be used in particularly limited areas.

In order to eliminate these drawbacks, the present invention uses a sandwich structure with a rigid member, a synthetic resin foam, and a radiant member to achieve heat insulation, water resistance, and water resistance through a synergistic effect that adds to the properties of the constituent members. We propose a construction board that has significantly improved moisture resistance, mechanical strength, flame retardancy, and is also lightweight.

The construction board according to the present invention will be explained in detail below using the drawings. FIG. 1 is a perspective view showing the above-mentioned construction board, in which 1 is plywood to enhance rigidity and mechanical strength, 2 is a radiant heat reflective layer and is a sheet-like material 3, such as paper, kraft paper, asbestos paper. and aluminum foil 4 are integrally laminated together. The sheet-like material 3 contributes to integration with the synthetic resin foam layer 5 described below, to strengthen so-called adhesiveness, and to improve mechanical strength by impregnating the radiant heat reflecting layer 2 itself with resin. Further, the aluminum foil 4 functions as a heat radiation layer, a water repellent layer, a moisture barrier layer with high moisture permeability, and a beautiful outer surface layer. Reference numeral 5 denotes a synthetic resin foam layer (hereinafter simply referred to as foam), which is made of, for example, polyurethane foam, polyisocyanurate foam, or phenol foam, and is formed in a closed cell structure between the surface 1a of the plywood 1 and the radiant heat reflective layer 2. . This foam 5 functions as a core material, a heat insulating layer, a flame retardant layer, a lightweight bulking material, a waterproof layer, and a moisture barrier layer for the sandwich structure, and also serves as a core material for the sandwich structure, and also serves as a layer for the sheet material 3 and the plywood 1, as shown in FIG. It also has the function of penetrating into the tissue of the surface 1a and improving the mechanical strength of the sheet 3 and the surface 1a of the plywood 1. Further, when forming the foam 5, the raw material is discharged in a so-called liquid state, and since it exhibits self-adhesive properties during reaction foaming, it functions as the best adhesive.
Furthermore, when the foam raw material immediately after each component is mixed is discharged onto the sheet-like material 3, there is a difference between the temperature of the raw material during the reaction and the surface temperature of the sheet-like material 3, so that the contact A skin layer is formed in the area. This skin layer strengthens the waterproofness, moistureproofness and tensile strength of the sheet-like material 3, suppresses expansion and contraction of the sheet-like material 3 due to drying and wetting, and serves to prevent dimensional deformation and improve mechanical strength. 6 is asphalt felt, which mainly functions as a waterproof layer and a dew-proof layer for the plywood 1 which lacks water resistance. The asphalt felt 6 has a heat-resistant coating layer 7 on the back side 1b of the plywood 1.
Attach them together by interposing them. The heat-resistant coating layer 7 is made of a synthetic resin or an inorganic material, and improves the water resistance, moisture resistance, and flame retardancy of the plywood 1. Specifically, it is made of a non-flammable paint, a flame-retardant paint, Consists of foaming fire-retardant paint, etc. The above non-flammable paints include (1) alkaline type, (2) acidic type, and (3) other types. Flame-retardant paints include organic paints such as antimony trioxide, organic halide salts, and organic halogen phosphorus. It is a paint containing a flame retardant fire agent such as acid ester [tris (2-chloroethyl) phosphate, tris (2-bromoethyl) phosphate, tris (2,3 dibromopropyl) phosphate]. In addition, for foaming fireproofing paints, foaming agents (ammonium phosphate, guanidine phosphate, ammonium sulfate, sulfamic acid, ammonium sulfamate, ammonium bromide, boric acid, sodium borate, pentaerythritol dicyandiamide) are added to ordinary paint ingredients. Although it is normally no different from other paints, when exposed to fire or high temperatures, (a) the paint film becomes soft, and (b) gas is generated due to the decomposition of the foaming agent in the paint film, causing the paint to deteriorate. The film foams, and (c) foams or carbonizes and hardens, and the shape of the foam layer is maintained.

As mentioned above, the construction board according to the present invention exhibits super heat insulation properties due to the synergistic effect of the foam used as a core material and the radiant heat reflective layer, and has fire resistance.
Heat radiant aluminum foil and plywood are sandwiched together with foam, and asphalt felt is bonded together with a heat-resistant coating layer, so the synergistic effect of these results in greatly improved flame retardancy compared to plywood alone. It has characteristics. In addition, by effectively utilizing the self-adhesive property during foam formation, there is no need for adhesives to adhere to other members, and there is an advantage that manufacturing of architectural boards is easy and highly efficient. In addition, the liquid raw material permeates the sheet material and plywood, strengthening them and imparting waterproof and moisture-proof properties, as well as greatly improving mechanical strength due to their integration. Furthermore, the radiant heat reflective layer has high heat reflectivity and low light transmittance to block heat, so it has the characteristic of improving heat insulation. In addition, asphalt felt is attached to the plywood surface with a heat-resistant paint layer interposed, which strengthens the water resistance of the plywood and makes it easier to use when installing construction boards on the base.
It has the characteristic that there is no need to add a waterproof layer. In addition, the construction of the entire wall includes a waterproof layer, a heat insulating layer, and a radiant heat reflective layer in a single construction board, which significantly shortens construction time and improves weather resistance, condensation resistance, moisture resistance, and dimensions. It also has the characteristic of being highly stable.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a construction board according to the present invention;
FIG. 2 is an explanatory diagram that extracts and enlarges a part of it. 1... Plywood, 2... Radiant heat reflective layer, 5... Synthetic resin foam layer, 6... Asphalt felt, 7
...Heat-resistant coating layer.

Claims (1)

[Scope of utility model registration request] A closed-cell synthetic resin foam layer 5 is integrally fixed between the surface 1a of the plywood 1 and the radiant heat reflective layer 2 made of a laminated sheet material and aluminum foil.
Furthermore, an architectural board characterized in that an asphalt felt 6 is integrally adhered to the back surface 1b of the plywood 1 with a heat-resistant coating layer 7 interposed therebetween.