JPH07172899A - Ornamental material for building - Google Patents

Abstract

PURPOSE:To obtain an ornamental material having the same feeling as natural marble, flame resistant and seamless and capable of freely selecting pattern by blending a hydraulic gypsum, a coagulation modifier and a glue aq. solution. CONSTITUTION:The ornamental material for building contains 100 pts.wt. hydraulic gypsum composed mainly of beta-type gypsum hemihydrate, 1-2 pts.wt. coagulation modifier and 30-40 pts.wt. 2-3% glue aq. solution. Potassium citrate, ammonium phosphate, carboxymethyl cellulose and the like are exemplified as the coagulation modifier. It is conceivable that the coagulation modifier surrounds crystal forming nucleuses and disturbs the crystal growth to retard the coagulation. At the time of using for the ornament of an actual building, the thickness of the ornamental material is controlled to about 5mm. Then, a reinforcing material is used on the rear. As the reinforcing material, a material obtained by weaving natural fibers such as hemp, artificial fibers such as nylon, glass fiber, carbon fiber, metallic fiber or the like into a sheet with a coarse mesh and hardening with a usual gypsum is used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative material for a building, and more particularly to a decorative material used for decorating a wall surface or a pillar surface exposed inside a building.

[0002]

2. Description of the Related Art Conventionally, natural marble has been mainly used for decoration on the surface of building materials. Recently, patterned synthetic resins and metal plates have also been used.

[0003]

However, natural marble has problems that it is difficult to obtain a large gemstone, and if small pieces are pasted together, a seam will be created and the eyes will be obstructed, and the pattern cannot be freely selected. Synthetic resins do not have a high-class look and are flammable or generate toxic gases when burned,
There is a limitation in using it as an interior material for buildings, and a metal material has a problem that it feels cold.

It is an object of the present invention to provide a decorative material for a building, which has the same feeling as natural marble and is flame resistant, seamless, and free to choose a pattern.

[0005]

The present invention is based on 100 parts by weight of hydraulic gypsum mainly composed of β-type hemihydrate gypsum and a setting regulator 1 to 1.
A decorative material for a building, comprising 2 parts by weight and 30 to 40 parts by weight of a 2-3% aqueous glue solution.

[0006]

According to the present invention, the present decorative material is a mixture of hydraulic gypsum, a coagulation modifier and a pigment optionally added, which is kneaded and coagulated with an aqueous solution of glue. Here, the hydraulic gypsum serves as a base material for the present decorative material. The setting modifier delays the setting of hydraulic gypsum, and by adding it, the setting time is extended to about 3 to 5 hours (about 20 minutes for the non-added one), which will be described later. The operation can be performed. The pigment colors the present decorative material, and various colored decorative materials can be manufactured depending on the type and amount thereof. Further, when manufacturing the white decorative material, the pigment is not mixed. Nikawa has the effect of increasing the affinity of hydraulic gypsum with water,
It has a slow-setting effect.

There are various theories regarding the setting process of hydraulic gypsum. In summary, hydraulic gypsum is divided into hemihydrate gypsum (CaSO ₄ .1 / 2H ₂ O) and anhydrous gypsum (CaS).
It is a mixture of O ₄ ). When kneading this hydraulic gypsum with water,
Hemihydrate gypsum and anhydrous gypsum are soluble in water and become insoluble dihydrate gypsum (CaSO ₄ .2H ₂ O). The precipitate of dihydrate gypsum is acicular crystals, and the crystals grow with the formation of the precipitates and cross each other to form a network structure. At this time, heat generation and expansion are involved. Also, if the water content is high, excess water will enter the network and reduce the hardness of the gypsum. In addition to this, a part of anhydrous gypsum has β type which is insoluble in water, which also causes a decrease in hardness after hardening. Also, soluble hemihydrate gypsum and anhydrous gypsum differ in degree of setting and expansion depending on their types, so β-type hemihydrate gypsum, which does not cause pattern distortion and has a low degree of expansion, is used as the main component for the decorative material. The amount of water used for kneading is preferably a theoretical value according to the following reaction formula.

CaSO ₄ 1 / 2H ₂ O + 3 / 2H ₂ O =
CaSO ₄ .2H ₂ O However, since the affinity of hydraulic plaster and water is not so good,
Kneading with such a small amount of water is difficult.
Therefore, use an aqueous solution of glue that has an affinity for both hydraulic gypsum and water, and knead with the amount of water as close to the theoretical amount as possible. It should be noted that the glue may be made from animal bones such as a rabbit and a rabbit by a known method.

The setting regulators are potassium citrate, ammonium phosphate, carboxymethyl cellulose (CM
C) is used. This surrounds the crystal-forming nuclei and hinders their growth, which is considered to delay the setting.

When the decorative material produced as described above is used for the actual decoration of a building, its thickness is about 5 mm. Therefore, a reinforcing material is used on the back surface. As the reinforcing material, a natural fiber such as hemp, an artificial fiber such as nylon or vinylon, a glass fiber, a carbon fiber, a metal fiber or the like is woven with a coarse mesh to form a sheet, which is hardened with an ordinary plaster. Since the woven cloth is hardened with 2 to 5 sheets of laminated gypsum, the thickness of the reinforcing material is about 10 to 20 mm, although it depends on the size.

The decorative material produced by the above method is hard and tough after setting. After it is attached to a building, its surface is polished to give gloss.

[0012]

The present invention will be described in more detail by the following examples.

100 parts by weight of hydraulic gypsum containing β-type hemihydrate gypsum as a main component and 1.0 to 1.
2 parts by weight and the pigment were added and mixed well. The type and mixing amount of the pigment differ depending on the type of color of the decorative material to be manufactured and its shade. On the other hand, an aqueous solution of glue was prepared by dissolving 2.5 g of glue in 100 g of water, and 100 parts by weight of the mixture and 30 to 40 parts by weight of the aqueous solution of the glue were thoroughly mixed and kneaded to obtain a decorative material composition. This decorative material composition was solidified in about 3 hours after kneading.

FIG. 1 is a sectional view for explaining an embodiment using the method of the present invention. An anchor bolt 4 for mounting a decorative material is embedded in a building to be decorated, for example, a concrete wall 7. A porous sheet, for example, a woven fabric 3 woven with coarse hemp is attached to this, and hydraulic gypsum is mixed with a coagulation modifier and kneaded with water (hereinafter simply referred to as "plaster").
2) is applied to the extent that it oozes from the top of the woven fabric 3 to the back thereof, and then the second woven fabric 3 is applied and the plaster 3 is applied again to obtain a reinforcing material. The unconsolidated decorative material composition 5 of various colors is attached to the surface of the plaster 2 by pressing with a finger according to the pattern until the plaster 2 is set. The size of the decorative material composition 5 to be applied varies depending on the pattern, but it varies from a spherical shape having a diameter of about 1 cm to a hand-held size 5b according to the pattern, and the shape is further adjusted with a bamboo stick or the like. When the decorative material composition 5 is applied over the entire surface of the plaster 2, the surface is finished to be a substantially flat surface, and after waiting until the plaster 2 and the decorative material composition 5 are completely solidified, the decorative material composition The surface of 5 is ground to the polishing line 6, and the surface is ground.

Since the decorative material 1 is attached to the wall surface 7 by several anchor bolts 4 as described above and is reinforced by the reinforcing material composed of the woven fabric 3 and the plaster 2, it is hard and tough. .

[0016]

As described above, according to the present invention, a β-type hemihydrate gypsum base material is mixed with a settling agent and optionally a pigment, and this is kneaded with an aqueous solution of glue. , A hard marble-like gypsum crystal is obtained, which can be used as a decorative material for buildings. The color and shape of this decorative material can be freely selected.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

[Explanation of symbols]

 1 Decoration Material 2 Gypsum 3 Porous Sheet 5 Decoration Material Composition 7 Wall

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Claims (1)

[Claims] 1. A hydraulic gypsum 1 mainly composed of β-type hemihydrate gypsum.
00 parts by weight, 1 to 2 parts by weight of a coagulation modifier, and 30 to 40 parts by weight of a 2-3% aqueous glue solution, a decorative material for buildings.