JPH04243949A - Production of reinforced inorganic board - Google Patents

Abstract

PURPOSE:To obtain the subject board having improved flexural strength by impregnating and curing a resin in a glass filament mat, filling an inorganic slurry to the obtained reinforced fiber material and curing the product. CONSTITUTION:A glass filament mat 20 such as continuous strand mat produced by spirally stacking a twisted glass filament in the form of a continuous mat is impregnated with a resin 21 such as unsaturated polyester compounded with a reaction initiator and a thickener. The resin-impregnated glass filament mat is passed through a gap between rolls to squeeze out excessive resin and obtain a prepreg mat composed of the glass filament mat 20 holding the resin. The prepreg mat is cured with heat to get a reinforced fiber material 2 having a prescribed porosity. The fiber material is placed in a mold, an inorganic slurry 3 such as mortar produced by mixing cement, aggregate and water is filled in the mold and the content in the mold is extruded, cured and demolded to obtain a reinforced inorganic board having high strength in the direction of thickness and excellent shape-retainability.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a reinforced inorganic board by filling and curing an inorganic slurry into a reinforcing fiber material.

0002

2. Description of the Related Art Generally, reinforced inorganic boards are required to have excellent bending strength.

Conventionally, as a manufacturing method of such a reinforced inorganic board with excellent bending strength, for example, Japanese Patent Laid-Open No. 57
As shown in Japanese Patent No. 183354, a method is known in which a net-like laminate of a predetermined thickness is filled with gypsum slurry and integrated into a net-like laminate having a plurality of layers laminated together. Also, JP-A-58
As shown in Japanese Patent No. 140353, a method is known in which concrete is cast and cured using a lattice-like mesh fabric attached or impregnated with a synthetic resin material as a reinforcing core material.

0004

[Problems to be Solved by the Invention] However, in the case of the above-mentioned conventional method for manufacturing a reinforced inorganic board, the following disadvantages occur.

That is, when manufacturing the reinforced inorganic board shown in JP-A-57-183354, since the thickness of the net-like material is limited, a plurality of net-like materials are required to maintain the shape in the thickness direction. There was an inconvenience that .

[0006] Furthermore, when manufacturing the reinforced inorganic board shown in JP-A-58-140353, the reinforcing core material is a lattice-like mesh fabric impregnated with or impregnated with a synthetic resin material. Although the structure can be maintained, the shape in the thickness direction cannot be maintained.

[0007]Furthermore, obtaining a reinforcing material having a net-like structure as described above requires a lot of man-hours and is expensive.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for manufacturing a reinforced inorganic board that can easily maintain its shape in the thickness direction.

[0009]

[Means for Solving the Problems] The method for manufacturing a reinforced inorganic board of the present invention is a method of filling and hardening an inorganic slurry into a reinforcing fiber material, the method comprising reinforcing fibers obtained by impregnating and hardening a long fiber glass mat with a resin. The material is filled with an inorganic slurry and hardened.

0010

[Function] The reinforced inorganic board of the present invention is made by filling and hardening an inorganic slurry into a reinforcing fiber material made by impregnating and hardening a long fiber glass mat with a resin, which has a relatively high porosity and is relatively thick as a mat. The long fiber glass mat improves the orientation of the fibers, particularly in the thickness direction, and the orientation is maintained by the resin that is impregnated and cured.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 schematically show the manufacturing process of the reinforced inorganic board 1. That is, this reinforced inorganic board 1 is made by filling and hardening an inorganic slurry 3 into a reinforcing fiber material 2 made by impregnating a long fiber glass mat 20 with a resin 21 and hardening it.

The long fiber glass mat 20 is, for example, a continuous strand mat (which is formed by twisting long fibers and stacking them in a spiral shape to form a continuous mat).
Usually, a thickness of 3 to 7 mm and a porosity of 95 to 98%) can be used. In the case of this long fiber glass mat 20, the porosity is high because the fibers are loosely intertwined with each other.
Formed in a bulky state.

As the resin 21 with which the long fiber glass mat 20 is impregnated, various resin materials such as thermosetting resins and ultraviolet curable resins can be used. Specifically, 100 parts by weight of an unsaturated polyester resin (trade name "Rigolac 2064" manufactured by Showa Kobunshi Co., Ltd.) and a reaction initiator (trade name "Trigonox 21LS50" manufactured by Kayaku Akzo Co., Ltd.)
A mixture of 1.5 parts by weight of 1.5 parts by weight of a thickener (Kyowa Mag 150, magnesium oxide manufactured by Kyowa Kagaku Co., Ltd.), or a mixture of 1.5 parts by weight of the above reaction initiator and a UV curing initiator ( Ciba Geigy product name “Irgacure #651”
'') can be used with the amount changed to 0.5 part by weight.

The reinforcing fiber material 2 is the above-mentioned long fiber glass mat 20, for example, "Continuous Strand Mat" manufactured by Asahi Fiberglass Co., Ltd. (M8600, 300 g/m
2. Approximately 5 mm thick, porosity 96-97%) with resin 21
It is formed by impregnating and curing. However, the resin 21 must be impregnated and cured to such an extent that the high porosity, which is a characteristic of the long fiber glass mat 20, is not impaired. As a specific method for impregnating and curing the resin 21 in a state of high porosity, first, the long fiber glass mat 20, for example, the continuous strand mat described above, is impregnated with the resin 21. Then, the long fiber glass mat 20 is passed between rolls and the excess resin 21 is squeezed out so that the long fiber glass mat 20 contains resin 21. For example, 600g/m 2 (glass fiber 300g/m 2
, a resin content of 300 g/m 2 ). Thereafter, by curing this resin 21 at a mold temperature of 150 degrees Celsius, for example, a reinforcing fiber material 2 having a thickness of about 3 mm and a porosity of 80 to 90% can be obtained.

The inorganic slurry 3 may be concrete, mortar, etc. mixed with cement, aggregate, water, etc.
Various materials used in the manufacture of general inorganic boards can be used.

The procedure for filling and hardening the reinforcing fiber material 2 with this inorganic slurry 3 is to first place the reinforcing fiber material 2 in the lower mold 40 . Next, the inorganic slurry 3 is filled into the lower mold 40 and pressed with the upper mold 41. On this occasion,
By interposing the spacer 5 or the like between the lower mold 40 and the upper mold 41, the thickness of the reinforcing fiber material 2 can be freely regulated. After the inorganic slurry 3 is cured, the lower mold 40 and the upper mold 41 are demolded to obtain the reinforced inorganic board 1.

[0018]

[Effects of the Invention] As described above, according to the present invention, the long fiber glass mat improves the orientation of the fibers, and the resin that is impregnated and cured maintains the orientation. , a reinforced inorganic board with excellent strength in the thickness direction and shape retention performance can be obtained. In addition, since we are simply using reinforcing fiber material made by impregnating long fiber glass mat with resin, there is no need to increase the number of man-hours and efforts in manufacturing the reinforcing fiber material, and it is easy and inexpensive to use reinforced inorganic board. It becomes possible to manufacture

[Brief explanation of the drawing]

FIG. 1 is a drawing showing a manufacturing process of a reinforced inorganic board according to the present invention, and is a sectional view showing a reinforced inorganic material.

FIG. 2 is a drawing showing the manufacturing process of the reinforced inorganic board according to the present invention, in which the reinforced inorganic material shown in FIG. 1 is placed in the lower mold,
FIG. 3 is a cross-sectional view showing a state filled with inorganic slurry.

3 is a drawing showing the manufacturing process of the reinforced inorganic board according to the present invention, and is a sectional view showing a state in which the upper mold is closed in the state shown in FIG. 2. FIG.

FIG. 4 is a diagram showing the manufacturing process of the reinforced inorganic board according to the present invention, and is a cross-sectional view showing the product after being demolded from the state shown in FIG. 3.

[Explanation of symbols]

1. Reinforced inorganic board 2 Reinforced fiber material 20 Long fiber glass mat 21 Resin 3 Inorganic slurry

Claims (1)

[Claims] 1. A method of filling and curing a reinforcing fiber material with an inorganic slurry, the method comprising filling and curing the inorganic slurry into a reinforcing fiber material obtained by impregnating and curing a long fiber glass mat with a resin. Method of manufacturing inorganic board.