JPS593060A - Construction material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a building material based on gypsum.

The use of gypsum as a building material has been practiced for a long time. Such gypsum materials have various advantages such as being inexpensive and having excellent fire resistance, and are widely used as interior wall materials or ceiling materials. On the other hand, although gypsum as a construction material is lighter than concrete, it generally has the disadvantage of being heavy, so when boards or panels made of such gypsum materials are used, they are difficult to use on site. There are disadvantages in that it is difficult to handle and has poor workability. On the other hand, in recent years, in order to improve the impact resistance of gypsum boards or gypsum panels, it has been considered that they are reinforced with perlite, but even in this case, the weight is almost the same as regular gypsum boards. It remains the same, and the drawback of poor workability has not been resolved.

In view of the above points, the object of the present invention is to provide a building material mainly made of gypsum that is lightweight and has excellent workability, and also achieves a building material that has excellent heat insulation and sound insulation properties. In order to achieve this purpose, the first aspect of the present invention is as follows.
The invention is characterized in that the main material is gypsum, and foamed beads of synthetic resin such as foamed polystyrene and glass fibers are mixed into the gypsum main material.
The invention is characterized in that the main material is gypsum, and foamed beads of synthetic resin such as expanded polystyrene, glass fibers, and a water-soluble adhesive are mixed into the gypsum main material.

That is, according to the present invention, for example, foamed beads of polystyrene resin are added in a gypsum slurry mixed with water at a weight ratio of 3% and an electric ratio of about 3 to 1 gypsum, and an appropriate amount of glass fibers. The slurry containing foamed synthetic resin beads and glass fibers is poured between base paper sheets and dried.

The drawing shows a cross section of the board obtained in this way, in which foamed synthetic resin beads (3) and glass fibers (4) are contained in the gypsum main material (2) sandwiched between the board base paper (1). It's mixed.

The building material of the present invention obtained as described above has a specific gravity of 0.4, whereas the specific gravity of ordinary gypsum is 0.75.
7, it is much lighter, easier to handle, and has excellent workability.
Furthermore, the synthetic resin foam beads (3) do not cause air bubbles in the gypsum board or panel, and therefore have excellent heat insulation and sound insulation properties. In this case, even if the foam beads (3) disappear or deteriorate due to heat, the air bubbles will still remain, and the heat insulation and sound insulation properties will be better, so the fire retardant performance will be higher than that of ordinary gypsum. will improve. Furthermore, although gypsum usually requires time to dry, the presence of the foamed beads (3) as described above provides a manufacturing advantage in that the drying time becomes faster. Furthermore, according to the second aspect of the present invention, a water-soluble adhesive such as a resin emulsion is mixed, and the water-soluble adhesive reacts with moisture and hardens to increase strength and improve water resistance, which is a weak point of plaster. and improves adhesion to metals, etc.

In addition, although the embodiment shown in the drawing shows a board with base paper (1) attached, it is also possible to increase the fire retardance by attaching a steel plate or aluminum plate to one or both sides instead of this. Furthermore, it is also conceivable to interpose a metal mesh material in the intermediate portion.

As can be seen from the above explanation, the present invention takes advantage of the advantages of gypsum, which has excellent fire retardant properties, further improves this fire retardant property, and is much lighter and easier to work with than conventional ones. It also has excellent heat insulation and sound insulation properties, making it ideal for ceiling materials or interior wall materials. We were able to obtain a remarkable effect in that it was possible to improve the

[Brief explanation of the drawing]

The drawing is a cross-sectional view of a board obtained according to the invention. +11. ,,Base paper, +21 ,,,Gypsum,
+31. ,,foamed beads, (41,,glass fiber.

Claims (1)

[Scope of Claims] 1. A building material characterized in that the main material is gypsum, and foamed beads of a synthetic resin such as expanded polystyrene and glass fiber are mixed into the gypsum main material.2. Architectural material 3 in which base paper is attached to the surface of a gypsum board molded according to claim 1. The main material is gypsum, and the gypsum main material contains foamed beads of synthetic resin such as expanded styrene, glass fiber, and Architectural material characterized by containing a water-soluble adhesive