JPS586622B2 - Funenshi Tojiyoukenchikuyouzai - Google Patents

Description

[Detailed description of the invention] The present invention relates to a noncombustible sheet construction material.

Conventionally, sheet-like building materials such as asphalt roofing materials, which are made by impregnating asphalt with organic fiber sheet materials such as paper and cloth or inorganic fibers such as asbestos, rock wool, and glass fibers, have been widely used. Conventional sheet-shaped construction materials have not been satisfactory in terms of fire resistance, and have been unsatisfactory as construction materials for urban areas.

The present invention aims to solve the problem of fire resistance of sheet-like construction materials, and is intended to improve the water resistance, flexibility, etc. of adhesive substances such as asphalt or atactic polypropylene. A mixture of plastics or rubber as a modifier is added with a weight ratio of O,
An impregnating mixture obtained by mixing an inorganic nonflammable agent containing 8 to 4 times the amount of crystallization water with a dehydration temperature of 200 to 400 °C,
Organic fiber sheet materials made of paper, cloth, etc. or asbestos;
It is characterized by being impregnated with an inorganic fiber sheet material made of rock wool, glass fiber, etc.

It is difficult to obtain adhesive substances such as naturally produced asphalt or industrial waste attack polypropylene that have a certain quality suitable for the purpose of use in terms of water resistance, flexibility, etc.

Therefore, in the present invention, the flexibility of these adhesive materials,
Plastics or rubber is added as a modifier to improve water resistance.

The amount added should be determined appropriately depending on the properties of the asphalt or atactic polypropylene used and the purpose of use, but it should be added in the range of 0.5 to 2.5% by weight based on the asphalt or atactic polypropylene. be done.

As the above-mentioned plastics for the modifier, polyethylene, polypropylene, polyester, etc. are used, and as the rubber for the modifier, sterene butadiene rubber, nitrile rubber, neoprene rubber, etc. are used.

It is not possible to obtain a sheet-like building material having satisfactory non-combustibility, which is the object of the present invention, by using only a mixture of a sticky substance such as the above-mentioned asphalt or adhesive polypropylene and a modifier such as plastics or rubber.

Therefore, in the present invention, the above mixture has a weight ratio of 0.8 to
An inorganic nonflammable agent containing crystal water with a dehydration temperature of 200 to 400° C. is mixed in four times the amount.

As the hydrated inorganic flame retardant, tricalcium, aluminate, hexahydrate, aluminum hydroxide, hydrated gypsum, calcium silicate, etc. are used.

The amount added is 0.8 to 4 times the weight ratio of the above mixture; if the amount used is less than 0.8 times, the effect of imparting nonflammability will be insufficient, and if the amount used is more than 4 times the amount, The flexibility and adhesiveness of the impregnating mixture obtained by blending these materials are extremely reduced, making it impossible to obtain a satisfactory sheet-like building material.

The noncombustible sheet-like building material S of the present invention can be obtained by impregnating an organic or inorganic fiber sheet material 2 with the thus obtained noncombustible impregnating mixture 1 as shown in FIG. Glass powder, silica sand, river sand, perlite, calcium carbonate, hydrated gypsum, etc. can be added to the impregnating mixture as a filler depending on the need.

By adding these fillers, the heat insulation properties of the noncombustible sheet-like building materials can be improved, and the production cost thereof can be reduced.

Moreover, the noncombustible sheet-like construction material S of the present invention can be easily handled by pasting a separate film 3 on one side to prevent stickiness, as shown in FIG.

This separate film is preferably one that does not exhibit adhesiveness at a temperature of 40 to 50°C or lower, but exhibits adhesiveness at a temperature of 50°C or higher.

The present invention is as explained above, and uses an inorganic material containing water of crystallization with a dehydration temperature of 200 to 400°C as a nonflammable agent. Without dehydration, it begins to dehydrate rapidly when heated to near the decomposition temperature of rubber and plastics, suppressing the rise in temperature, and blocking the air with the generated water vapor, preventing ignition and increasing the tendency to carbonize. can.

Therefore, it has much better nonflammability than conventional sheet-like construction materials.

In addition, in the present invention, plastic or rubber is added as a modifier to asphalt or atactic polypropylene, so it has better water resistance than conventional sheet-like construction materials and also has appropriate flexibility. .

Furthermore, by selecting and adjusting the type and amount of modifier added, the product is always non-sticky and easy to handle.
After this material is attached and fixed to a building as a roofing material or an interior/exterior wall material, when the temperature of the roof or wall rises to 50℃ or higher, it exhibits adhesive properties and adheres to the roof or wall surface, improving the water resistance of the roof. , can exhibit wind resistance and fire resistance.

[Brief explanation of drawings]

FIG. 1 is an enlarged sectional view of a main part of an example of a noncombustible sheet-like building material according to the present invention, and FIG. 2 is an enlarged sectional view of a main part of another example of the same. 1 is a noncombustible impregnation mixture, 2 is a fiber sheet material, 3 is a separate film, and S is a noncombustible sheet construction material.

Claims (1)

[Claims] 1 A mixture of asphalt or atactic polypropylene and plastic or rubber with a weight ratio of 0.8
A noncombustible sheet characterized in that an organic or inorganic fiber sheet material is impregnated with an impregnating mixture obtained by mixing an inorganic nonflammable agent containing ~4 times the amount of crystallization water with a dehydration temperature of 200 to 400°C. shaped construction material.