JPH0310035Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to non-combustible, lightweight, and heat-insulating siding.

(Prior technology) Conventional lightweight, heat-insulating siding is made by combining synthetic resin foam on the back side of an inorganic substrate, but it has problems in terms of flame retardancy and the generation of toxic gas when exposed to flames. Although there are some products in which a lightweight inorganic material such as pearlite is composited on the back side, the specific gravity and water absorption are large, and there is also the problem that pearlite tends to turn into powder. Furthermore, there are also sliced chemically foamed lightweight cements such as ALC, which have a light specific gravity and good insulation properties, but due to the nature of the foaming process, they are continuously foamed, so they have high water absorption and freeze-thaw in cold regions. There are also problems such as low resistance to water and low mechanical strength of the surface.

(Problems that the invention aims to solve) As mentioned above, conventional lightweight insulating siding has problems with nonflammability, generation of toxic gas, and water absorption, and it is difficult to reduce weight due to its specific gravity, and it is also difficult to reduce weight in cold regions. There were also problems with cracks caused by freezing and thawing caused by water absorption.

In view of the above-mentioned problems, the present invention aims to provide siding that is nonflammable, lightweight, has low water absorption, and does not cause cracks due to freeze-thaw phenomena caused by absorption of water in cold regions.

[Structure of the idea]

(Means for Solving the Problems) The present invention consists of an extruded substrate made of a composition containing a hydraulic inorganic material and having one side concave, and a heat insulating material having the same composition as the substrate filled in the concave surface of the substrate. It consists of a heat insulating material made of a hardened material and hollow polystyrene balloons dispersed in the heat insulating material by melt-hardening expanded polystyrene beads blended into the heat insulating material composition.

(Function) In the present invention, expanded polystyrene beads dispersed in a heat insulating material filled in the concave surface of an inorganic substrate melt and harden during heat curing to form a polystyrene balloon surrounded by a waterproof film inside the heat insulating material. It forms hollow cells that reduce weight and provide insulation and waterproof properties.

(Embodiment) An embodiment of the present invention will be described with reference to FIGS. 1 to 8.

Reference numeral 1 denotes an extrusion molded substrate, which is an elongated plate-shaped body having a concave cross section in the width direction. and board 1
Both end surfaces 2 and 3 in the width direction are planar as shown in FIG.
A real engagement consisting of longitudinal protrusions 5 and grooves 6 that engage with each other as shown in Fig. 2, and a reciprocal engagement consisting of protrusions 7 and 8 that are engaged with each other in a different manner as shown in Fig. 3. The grooves 9 and 10 are engaged in a continuous manner in the width direction by means of grooves 9 and 10 formed opposite each other in the length direction as shown in FIG.

The composition constituting the substrate 1 is mainly composed of hydraulic inorganic materials such as cement, lime, and gypsum slag, and contains aggregates such as silica stone (silica sand), inorganic fibers or synthetic fibers, and lightweight aggregates such as perlite. , a fluidity modifier such as methyl cellulose, and water were added, mixed, kneaded, and extruded using a screw type vacuum extruder with one side having a concave surface 11. Further, as shown in FIG. 5, a large number of hollow portions 12 may be formed in the substrate 1 to reduce weight and improve heat insulation.

Next, the heat insulating material composition to be filled into the concave surface 11 of the substrate 1 is 10 parts by weight of the same composition as the substrate 1 per 100 parts by weight of water.
~500 parts by weight, 0.1 to 20 parts by weight of polystyrene beads expanded 1 to 100 times, and further 0.1 to 10 parts by weight of an alkali-resistant synthetic resin emulsion such as acrylic resin per 100 parts by weight of the heat insulating material composition;
Add short fiber 17 such as asbestos, carbon fiber, glass fiber, etc. as shown in Figure 6 to 100 parts by weight of water.
It was added in an amount of 0.1 to 16 parts by weight.

Then, the above-mentioned heat insulating material composition is filled into the concave surface 11 of the uncured substrate 1 and heated under pressure in an autoclave together with the substrate 1, so that the heat insulating material 13 in which the heat insulating material composition is cured is integrated into the concave surface 11 of the substrate 1. is formed. In this heat insulating material 13, expanded polystyrene beads 15 in a heat insulating material composition 14 shown in FIG.
Polystyrene balloons 16 having a diameter of 0.1 to 3 mm as shown in FIG. Expanded polystyrene beads 15
If the expansion ratio is 100 times or more or the diameter of the polystyrene balloon 16 is 3 mm or more, the polystyrene balloon will float on top of the heat insulating material composition, making uniform dispersion difficult. Further, if the expanded polystyrene beads 15 are 20 parts by weight or more or the diameter of the balloon 16 is 0.1 mm or less, the insulation composition slurry will be insufficient. The addition of the acrylic resin emulsion imparts water resistance to the heat insulating material 13, and the addition of the short fibers 17 provides the heat insulating material 13 with mechanical strength.

Next, the operation of the above embodiment will be explained.

Both the substrate 1 and the heat insulating material 13 are heat insulating and nonflammable, and the polystyrene balloons 16 dispersed in the heat insulating material 13 reduce the weight of the heat insulating material 13, and the waterproof property of the polystyrene resin film forming the balloons 16 prevents moisture from penetrating. There is no risk of cracks occurring due to freezing and thawing of moisture that has penetrated in cold regions.

[Effect of idea]

According to the present invention, it is heat insulating, nonflammable, lightweight, does not allow moisture to penetrate, and does not cause cracks due to freezing and thawing.

[Brief explanation of the drawing]

1 to 6 are partial perspective views showing different embodiments of the siding of the present invention, respectively. FIG. 7 is an enlarged view of a part of the above heat insulating material composition, and FIG. 8 is an enlarged sectional view of a part of the above heat insulating material. 1...Substrate, 11...Concave surface, 13...Insulating material,
15...Expanded polystyrene beads, 16...Polystyrene balloon.

Claims (1)

[Scope of utility model registration request] an extrusion molded substrate made of a composition containing a hydraulic inorganic material and having one side concave; a heat insulating material filled with the concave surface of the substrate, which is made by curing the same heat insulating material composition as that of the substrate; A siding comprising hollow polystyrene balloons dispersed in the heat insulating material by melt-hardening expanded polystyrene beads blended into the material.