JPH04127489U - Nonflammable synthetic resin pipe - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to obtain a nonflammable synthetic resin pipe such as a fiber-reinforced plastic pipe that is water resistant and lightweight, and also has excellent heat resistance and flame resistance. . [Structure] A glass-like film 2 made of a composite material of metal alkoxide and inorganic filler is integrally formed on the inner or outer surface (the inner surface in the illustrated example) of the tube body 1A made of fiber-reinforced resin. High heat resistance due to membrane,
Provides flame resistance.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to nonflammable synthetic resin pipes.

0002

[Conventional technology]

Traditionally, cement mortar pipes or duct ties have been used as protection pipes for underground cables. Underground sewer pipes such as cast iron pipes may be used. However, cement mortar pipes or duct ties are used as underground sewer pipes. Cast iron pipes have the advantage of being extremely strong and water resistant, but they are also heavy. The efficiency of transportation and construction is poor, and the equipment is too large to be used as a protection pipe for underground cables. There was a problem. In view of these problems, plastic pipes, etc. are used as protection pipes for underground electric wires. It is possible to do so.

0003

[Problems with conventional technology]

However, the above plastic pipes are flammable or resistant due to heat from inside and outside. There is a problem with heat, and the protection tube may leak inside due to a short circuit or overheating of the electric wires stored inside. There is a risk of fire spreading due to deterioration or fire in the vicinity, which poses safety concerns. There was a problem with the problem.

0004

[Problems that the invention aims to solve]

In view of the above problems, this idea was developed using fiber-reinforced plastic pipes that are water resistant and lightweight. What kind of synthetic resin pipe is it made of non-flammable synthetic resin with excellent heat resistance and flame resistance? This was done for the purpose of obtaining pipes.

[0005] In other words, the nonflammable synthetic resin pipe of this invention has an inner surface or inner surface of the pipe body made of fiber reinforced resin. has a glass-like film made of a composite material of metal alkoxide and inorganic filler on the outer surface. It is characterized by being formed.

[0006]

【Example】

Next, an example of this invention will be described. FIG. 1 is a sectional view of an embodiment of this invention. The nonflammable synthetic resin pipe 1 of this invention has a pipe body 1A made of fiber-reinforced resin. is made of a composite material of metal alkoxide and inorganic filler on the outer surface (the inner surface in the example shown). The glass-like film 2 is integrally formed. In the above example, a glass made of a composite material of metal alkoxide and inorganic filler was used. Although the case where the lath-like membrane 2 is provided only on the inner surface is shown, it may be provided on the outer surface, and it may also be provided on the inner surface. It may be provided on both sides of the outer surface.

[0007] What is the glassy film 2 made of a composite material of metal alkoxide and inorganic filler? , a sol-like metalloxane polymer is produced by the hydrolysis and polycondensation reaction of the above metal alkoxide. Rimmer is a product made by heating this and scattering water and alcohol to harden it. Inorganic filler is added as an extender to the reaction matrix. .

[0008] When manufacturing the nonflammable synthetic resin pipe 1, a glass-like film 2 is formed on the inner surface. In this case, a coating made of a composite material of metal alkoxide and inorganic filler is applied to the surface of the core metal. Using a roll, etc. Apply it to a uniform thickness, heat it in a hot air oven at 120°C for 10 minutes to cure it, and then The resin-impregnated fibers are wound around the core metal in the same way as ordinary FRP pipes are formed. It is molded, hardened by heating and drying again, and molded by pulling out the core metal. It will be done.

[0009]

[Effect]

The nonflammable synthetic resin pipe 1 of this invention has a metal aluminum constituting the inner layer or the outer layer. Coating layer 2 made of a composite material of coxide and inorganic filler is heat resistant and flame resistant. The main body is a tube made of synthetic resin as a seed component. It provides sufficient protection for its internal and external surfaces. It is also hard enough to rival that of glass. It also contributes to imparting strength to the tube body.

0010

[Effect of the idea]

As explained above, this idea is based on coating the inner and outer surfaces with a ceramic-like film. Even if the pipe is made of synthetic resin such as flammable resin, the heat resistance or flame resistance can be improved by the above coating. A plastic pipe that can be safely used as a protection pipe for underground electric cables This makes it possible. In addition, the coating layer is made of a composite material of metal alkoxide and inorganic filler. 2 has various effects such as being easy to manufacture because the temperature required for curing is low. have fruit.

[Brief explanation of drawings]

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

[Explanation of symbols]

1 Nonflammable synthetic resin pipe 1A Pipe body 2 Glass-like film made of a composite material of metal alkoxide and inorganic filler

Claims (1)

[Scope of utility model registration request] 1. A non-flammable synthetic resin pipe, characterized in that a glass-like film made of a composite material of metal alkoxide and inorganic filler is formed on the inner or outer surface of a pipe body made of fiber-reinforced resin.