JP2587171Y2 - Flameproof sheet - Google Patents

Description

[Detailed description of the invention]

[0001]

[Technical Field of the Invention] The present invention is a flameproof sheet, and more specifically, in the event of accidental ignition or ignition in a home or a factory, the spread of a fire is prevented by covering the sheet with a flame. And a flameproof sheet that does not generate toxic gas.

[0002]

2. Description of the Related Art Conventionally, as a flameproof sheet for preventing such spread of fire, a sheet using a glass cloth has been used. However, for example, when a gaseous substance is burning, there is a disadvantage that the gaseous substance permeates through the weave of the glass cloth and reignites on the sheet surface. Further, since the glass cloth has a melting temperature of about 850 ° C., there is a possibility that a hole or the like may be opened in an application exposed to a high temperature such as a welding spark.

In order to eliminate the above-mentioned drawbacks, polyvinyl chloride, chloroprene rubber,
A flameproof sheet provided with a flame retardant layer made of a halogen polymer such as CPE to prevent gas permeation has also been developed. However, according to such a flameproof sheet, since the above-mentioned flame-retardant layer contains chlorine, there is a drawback that toxic halogen gas and black smoke are generated during combustion.

The present invention has been made in view of the above-mentioned drawbacks, and has as its object to provide a flameproof sheet which is excellent in flameproofness and does not generate toxic gas during combustion.

[0005]

Means for Solving the Problems In order to solve the above problems, the flameproof sheet of the present invention comprises at least one halogen selected from the group consisting of glass fiber, rock wool, phenolic fiber and aramid fiber. At least one surface of a cloth made of flame-retardant fiber containing no halogen contains at least one halogen selected from the group consisting of ethylene propylene, butyl, SBR, NR, polyolefin and urethane rubbers. provided with a flame-retardant rubber layer, the flame retardant
The rubber layer contains 100 parts by weight of the rubber component and one metal hydrate.
100 to 500 parts by weight, and further contains a phosphoric acid compound and
10 to 100 parts by weight of at least one salt and / or phosphorus
It is characterized by containing 10 to 50 parts by weight.

According to the present invention, since a material containing no halogen is used for the cloth and the flame-retardant rubber layer as the base material, a flame-proof sheet which is excellent in flame resistance and does not generate toxic gas is provided. can do.

[0007]

DETAILED DESCRIPTION OF THE INVENTION FIG. 1 is a sectional view of the present invention.
As is apparent from this figure, the flameproof sheet according to the present invention has a structure in which a halogen-free flame-retardant rubber layer 2 is provided on both surfaces of a cloth body 1 made of halogen-free flame-retardant fibers. In this embodiment, the flame-retardant rubber layer 2 is provided on the surface. However, in the present invention, it is sufficient that at least one side is provided, and a plurality of these layers may be laminated.

[0008] As the flame-retardant fiber containing no halogen which constitutes the fabric body as described above, glass fibers, rock wool inorganic fibers, phenolic, organic fiber A aramid-based one
Use more than species.

Further, as the flame-retardant rubber layer 2 containing no halogen, for example, ethylene-propylene,
Use the system, S BR, those flame-retardant and NR-based rubber
You. Further, a flame-retardant elastomer containing no polyolefin-based or urethane-based elastomer such as EVA or EEA is used.

As the flame retardant added to make the elastomer flame-retardant, for example, a metal hydrate that releases water of crystallization and lowers the combustion temperature to make it flame-retardant is used . As such a metal hydrate, for example, one or more of magnesium hydroxide, aluminum hydroxide and the like can be used. 100 to 500 parts by weight of such a metal hydrate is added to 100 parts by weight of the rubber component . If the amount is less than 100 parts by weight, the flame retardant effect is small, while if it exceeds 500 parts by weight, the processability is reduced.

In addition to the above-mentioned flame retardants, one or more kinds of phosphorus, for example, red phosphorus, yellow phosphorus and the like are added in order to further improve the flame retardancy . Phosphorus is preferably added in a solid phase or a liquid phase, and particularly has a good function in the solid phase. Since the chemical reaction in the decomposition stage is directed to the direction in which carbon is easily formed, carbon monoxide, carbon dioxide, etc. are hardly formed, so this carbon forms a surface film, physically shields oxygen, and prevents the diffusion of combustible gas And prevent carbon vaporization. The above-mentioned phosphorus is added in an amount of 10 to 50 parts by weight. If the amount is less than 10 parts by weight, there is a possibility that it hardly contributes to flame retardancy.
Exceeding the weight parts may cause the physical properties of the rubber to be impaired.

In addition to the metal hydrate or the metal hydrate and phosphorus, one or more of a phosphate compound and a salt thereof are added to further improve the flame retardancy . Examples of the above-mentioned phosphate compound and phosphate include one or more of metaphosphate, polyphosphate, ultraphosphate, hydrogen orthophosphate and the like. Such compounds and salts become glassy and cover the surface,
Physically shut off oxygen. A phosphate compound as described above,
One or more phosphates are added in an amount of 10 to 100 parts by weight.
If the amount is less than 10 parts by weight, the effect of improving the flame retardancy is small, while if it exceeds 100 parts by weight, the effect is not improved.

The thickness of the flame-retardant rubber layer 2 is preferably 0.1 to 1.0 mm. 0.1mm
If it is less than 1.0 mm, sufficient flame resistance may not be obtained. On the other hand, if it exceeds 1.0 mm, flexibility may be lost, weight may increase, and transportability and workability may be impaired.

[0014]

EXAMPLE On both sides of a glass cloth, an ethylene propylene (EPDM) rubber layer having a flame retardancy by adding 100 parts by weight of magnesium hydroxide and 50 parts by weight of ammonium phosphate to 100 parts by weight of rubber was used. 3 mm was laminated to produce a flameproof sheet.

For comparison, a flameproof sheet in which three layers of glass cloth were laminated and a glass cloth in which chloroprene rubber flame-retardant compounded rubber was laminated on both sides by 0.3 mm, were covered over the gasoline combustion part.

As a result, the flameproof sheet of the present invention was initially fired from the end, but was easily extinguished by pressing it.
No toxic gas or black smoke was generated. On the other hand, those simply laminated with glass cloth seemed to have disappeared at first, but after a while, fired from the cloth surface. Also,
Since a large number of layers are stacked, the weight is large and handling is inconvenient. Further, the flameproof sheet having the chloroprene rubber layer generated black smoke and cracks on the rubber surface, and the surface was ignited after a further lapse of time.

[0017]

As described above, since the flameproof sheet according to the present invention is flexible and is composed of a cloth body and a flame-retardant rubber layer which do not contain halogen, toxic gas is generated at the time of fire extinguishing. There is an advantage that there is no.

[Brief description of the drawings]

FIG. 1 is a sectional view of a flameproof sheet according to the present invention.

[Explanation of symbols]

 1 Flame retardant cloth 2 Flame retardant rubber layer

Claims (1)

(57) [Scope of request for utility model registration] 1. A fabric comprising at least one halogen-free flame-retardant fiber selected from the group consisting of glass fiber, rock wool, phenolic fiber and aramid fiber, wherein at least one surface of the cloth comprises ethylene propylene. System, butyl system,
At least one halogen-free flame-retardant rubber layer selected from the group consisting of SBR, NR, polyolefin-based, and urethane-based rubber is provided, and the flame-retardant rubber layer is a rubber component.
100 to 500 parts by weight of metal hydrate
And one or more phosphate compounds and salts thereof.
0-100 parts by weight and / or 10-50 parts by weight of phosphorus
A flameproof sheet comprising: