JPS643907Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a pipe covering material that crushes the pipe and prevents fire, smoke, etc. from passing through the pipe in the event of a fire, etc. It is something.

[Problems with the past]

As is well known, buildings are equipped with pipes such as covered pipes for water and sewer pipes, electric wires, telephone lines, etc. In the event of a fire, fire, smoke, etc. can pass through the pipes, causing the fire to spread.
It is very often the main cause of the spread of smoke pollution. Therefore, a method has been considered in which the outer periphery of the pipe is coated with a pipe closing material having an expansion layer provided on a base material. The conduit closing material has an expansion layer that expands due to high heat during a fire and closes the conduit by crushing it. However, since the expansion layer contains a chemically unstable foaming agent, if the outer periphery of the pipe is coated with the conduit closing material, the expansion layer may change in quality and lose its expandability. Therefore, it is possible to cover the conduit closing material with a protective film. However, when a conduit is covered with a conduit closing material covered with a protective film and the excess portion is cut off, the conduit closing material is exposed from the cut portion. Therefore, it is necessary to form a protective film on each cut portion by painting or the like, which is time-consuming.

[Means for solving problems]

In order to solve the above conventional problems, this invention
Two protective films are polymerized, and a plurality of packaging parts are arranged between the two protective films and surrounded by an adhesive part in which the inner surfaces of the two protective films are adhered to each other. The gist is that the bag portion is sealed with a conduit closing material that is provided with an expansion layer that expands due to heat on a base material that does not substantially expand or contract.

〔Example〕

The present invention will be described with reference to an embodiment shown in FIGS. 1 and 2. Two protective films 1 are superimposed, and the two protective films 1, 1 are bonded at a predetermined location to form a bonded portion. form 2. A conduit closing material 3 is sealed in the envelope portion 1A, which is surrounded by the adhesive portion 2 between the two protective films 1, 1. The conduit closing material 3 has an expansion layer 3B that expands due to heat on a base material 3A that does not substantially expand or contract.

The material for the protective film 1 is preferably glass or plastic that is impermeable to moisture. Such plastics include polyvinyl chloride, polyvinylidene chloride, acrylic resin, methacrylic resin, vinyl acetate resin, styrene resin, urethane resin, epoxy resin, polyester, ethylene-vinyl acetate copolymer, and styrene-vinyl acetate copolymer.
Synthetic resins such as butadiene copolymer and acrylonitrile-butadiene copolymer are exemplified.

The base material 3A of the pipe closing material 3 may include metals such as iron, aluminum, and stainless steel, or fibers of these metals, ceramics such as alumina, silica, and zirconia, and other inorganic materials such as asbestos, rock wool, glass, and carbon. Or plate-like materials such as these inorganic fibers, paper, plastics, etc.
It is made of a material that does not substantially expand or contract, such as a sheet-like body, a net-like body, a woven or knitted fabric, or a non-woven fabric. The base material 3A is the expansion layer 3
B should maintain the property of not substantially expanding or contracting at the temperature at which it expands, and it is desirable that it does not emit harmful gases due to the high heat of a fire.In this respect, inorganic non-flammable materials are preferred over organic materials. It is advisable to choose a material with a high quality.

The expansion layer 3B of the conduit closing material 3 is an organic foaming material such as azodicarbonamide or azobisisobutyronitrile, or an inorganic compound having crystal water such as a silicate, a borate, a sulfate, a phosphate, or a chromate. , lower fatty acid salts such as formate, acetate, oxalate, carbonate,
Bicarbonate, alum, capsules of the above organic blowing agents and organic solvents are decomposed by heat to produce nitrogen gas,
Mainly contains substances that release gases such as water, lower fatty acids, carbon dioxide gas, and organic solvents, and if desired, binders such as vinyl acetate resin, vinyl chloride resin, etc.
Acrylic resin, methacrylic resin, styrene resin,
Polyethylene, propylene, fluororesin, acrylonitrile-butadiene copolymer, acrylonitrile-butadiene-styrene copolymer, styrene-butadiene copolymer, styrene-butadiene block copolymer, vinyl acetate-ethylene copolymer, urethane resin, Urea resin, melamine resin, phenolic resin, resorcinol resin, epoxy resin,
Natural resins, synthetic resins, and semi-synthetic resins such as polyamide, polyester, natural rubber, starch, polyvinyl alcohol, sodium alginate, carboxymethyl cellulose, rosin, and petroleum resin are mixed singly or as a composite. Also, if desired, calcium carbonate, titanium white, chrome yellow, carbon black, aluminum oxide, aluminum hydroxide, magnesium oxide, magnesium hydroxide, gypsum, silica, alumina, zirconia, holsterite,
Fillers such as whitebait balloons, vermiculite, perlite, lime, borax, river sand, cement, and slag may be added. Furthermore, if desired, anti-aging agents, ultraviolet absorbers, flame retardants, and other additives may be added. It is necessary for the expansion layer 3B to start expanding at high temperatures such as during a fire, and it is desirable that the expansion layer 3B does not expand at all at high temperatures, such as in the summer. Therefore, the expansion start temperature of the expansion layer 3B is at least 100°C or higher, preferably about 120°C or higher.

The conduit closing material is preferably a flexible trowel so as to be brought into close contact with the outer periphery of the conduit. However, even if the conduit closing material is not flexible, the conduit covering material of the present invention can be bent at the adhesive part 2 of the protective film 1 and can be wrapped around the outer circumference of the conduit.

A desirable specific example of the conduit closing material 3 consisting of the base material 3A and the expansion layer 3B will be shown below.

Pipe closure material No. 1 Base material 3A: Stainless steel wire mesh Expansion layer 3B: Water glass powder 100 parts by weight Acrylic resin emulsion 30 (50% solids by weight) Water glass solution 15 The above mixture was applied on base material 3A. By drying, an expanded layer 3B is obtained.

Pipe closure material No. 2 Base material 3A: Glass cloth Expanding layer 3B: Potassium borate crystals 100 parts by weight Styrene-butadiene copolymer 30 Latex (40% solids by weight) Carboxymethyl cellulose 0.5 Water 10 No. 3 Base material 3A: Aluminum thin film Inflatable layer 3B: Azobisisobutyronitrile 5 parts by weight Vinyl acetate resin emulsion 30 Water glass powder 100 Aluminum hydroxide 100 The above mixture is applied onto the base material 3A and dried to obtain the inflatable layer 3B. .

Other than this embodiment, for example, the packaging parts may be arranged in a grid pattern as shown in Fig. 3, in a diamond shape as shown in Fig. 4, or in a circular shape as shown in Fig. 5. It may be made into various shapes, such as a shaped one.

For example, as shown in FIG. 6, the pipe covering material is
For example, the outer periphery of the part protruding from the wall 5 of the pipe 4 made of polyvinyl chloride, polyethylene, polypropylene, glass fiber, reinforced plastics, synthetic resin such as polybdenum, metal such as aluminum or lead, or the inner part of the wall 5; It is wound around the inner and outer parts of the wall 5 in a spiral or cylindrical shape.
Once the pipe 4 has been wound to a predetermined length, it is cut. If the cut point at this time is the adhesive part 2 of the pipe covering material, the pipe closing material 3 will not be exposed. The pipe 4 and the conduit covering material 3 may be fixed with adhesive, adhesive, etc., if desired.

In Figure 6, when the pipe covering structure is directly or indirectly exposed to flame in the event of a fire, etc.
As shown in the figure, the pipe 4 is softened by the high heat of the flame 4, and the expansion layer 3B expands, but since the expansion layer 3B is restricted from expanding in the outer circumferential direction by the base material 3A, the inner circumference It expands in the direction, that is, in the direction that crushes the pipe 4. In this way, the pipe 4 is crushed and the conduit is cut off.

[Function/Effect] The present invention consists of a conduit closing material made by polymerizing two protective films, and surrounded by an adhesive part between the two protective films, in which the inner surfaces of the two protective films are bonded to each other. Since the expansion layer of the conduit closing material is sealed in a sealed bag, the protective film prevents air,
By being shielded from external factors such as moisture, deterioration is prevented and stable expandability can be maintained over a long period of time. When cutting the conduit covering material of the present invention to the required length, if it is cut at the adhesive part, the conduit closing material is still sealed in the envelope part and is not exposed to the outside world, ensuring stable expansion. can be maintained. Furthermore, even if the conduit closing material is inflexible, the conduit covering material of the present invention can be bent freely at the bonded part.
It can be easily wrapped at any position on the outer periphery of the pipe. When the expansion layer of the pipe coating material of the present invention that covers the outer circumference of the pipe expands due to heat, it is restricted from expanding in the outer circumferential direction by the base material.
It expands in the inner circumferential direction, crushes the pipe, blocks the pipe, and reliably prevents flame and smoke from passing through the pipe.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of one embodiment of the present invention, Fig. 2 is a plan view, Fig. 3 is a plan view of another embodiment, Fig. 4 is a plan view of yet another embodiment, and Fig. 5. 6 is a partially cutaway side view of a pipe covered with the pipe covering material of the present invention wrapped around a pipe, and FIG. 7 is a plan view of another embodiment of the present invention. It is a side sectional view showing a state. In the figure, 1...protective film, 2...adhesive part, 3
... Pipe closing material, 3A ... Base material, 3B ... Expansion layer.

Claims (1)

[Claims for Utility Model Registration] (1) A package made by polymerizing two protective films and surrounded by an adhesive portion between the two protective films, in which the inner surfaces of the two protective films are bonded to each other. A pipe covering material, characterized in that a plurality of bag parts are arranged, and a pipe closing material is sealed in the bag part, which is provided with an expansion layer that expands due to heat on a base material that does not substantially expand or contract. . (2) The pipe coating material as described in "Claim (1) for Utility Model Registration", in which the base material is made of a nonflammable material. (3) The tube described in "Utility Model Registration Claims (1) or (2)" wherein the expansion layer is composed of an inorganic compound that foams with heat and a synthetic resin binder that binds the inorganic compound. Road covering material.