JP2000054732A - Fireproof cash box - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a fireproof safe that is lightweight, easy to move and install. A fire-resistant expansion sheet (4) is constituted by an outer box (11) and an inner box (12), and is attached to either the inner surface of the outer box (11) or the outer surface of the inner box (12).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a fireproof safe.

[0002]

2. Description of the Related Art Conventionally, a fire-resistant safe comprising an outer box and an inner box, in which a space between the outer box and the inner box is filled with an inorganic refractory such as brick, concrete, sand or the like, is known.

[0003]

However, such a fire-resistant safe has a problem that it is difficult to move because of its heavy weight, and the installation place is limited.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a fireproof safe which is lightweight, easy to move and install.

[0005]

The fireproof safe according to the first aspect of the present invention comprises an outer box and an inner box, and a fire-resistant expansible sheet is provided on either the inner surface of the outer box or the outer surface of the inner box. It is characterized by being stuck.

The fire-resistant safe according to the second aspect of the present invention is further characterized in that the fire-resistant expansible sheet is made of a mixture of a thermoplastic resin and / or a synthetic rubber, a phosphorus compound, neutralized heat-expandable graphite, and an inorganic filler. It is characterized by.

In the fireproof safe according to the first aspect of the present invention, the material of the fire-resistant expansible sheet is not particularly limited, and may be, for example, a thermoplastic resin and / or a synthetic rubber, a phosphorus compound, a neutralized heat-expandable heat-resistant sheet. A mixture of graphite and an inorganic filler is included.

[0008] The thermoplastic resin is not particularly limited.
For example, a polyethylene resin such as a homopolymer of ethylene (polyethylene), a copolymer of ethylene and another α-olefin, or the like can be used.

[0009] Examples of the polyethylene resin include those obtained by polymerizing a Ziegler-Natta catalyst, a vanadium catalyst, a metallocene compound containing a tetravalent transition metal as a polymerization catalyst, etc. Among them, a metallocene containing a tetravalent transition metal is preferable. Those obtained using a compound or the like as a polymerization catalyst are preferred.

The tetravalent transition metal contained in the metallocene compound is not particularly restricted but includes, for example, titanium, zirconium, hafnium, nickel, palladium, platinum and the like.

The metallocene compound is a compound in which one or more cyclopentadienyl rings and one or more analogs thereof are present as a ligand (ligand) in the above-mentioned tetravalent transition metal.

Commercially available polyethylene resins obtained by using a metallocene compound containing a tetravalent transition metal as a polymerization catalyst include, for example, “CGC” manufactured by Dow Chemical Company.
T "," Affinity "," Engage ", Exxon Chemical Co., Ltd., trade name" EXTRACT ", and the like.

[0013] The thermoplastic resin may be used alone,
More than one species may be used in combination, or any of them may be used. A blend of two or more resins may be used as the base resin in order to adjust the melt viscosity, flexibility, tackiness, etc. of the resin.

[0014] Further, the thermoplastic resin contains the fire-resistant expansible sheet of the present invention in a range that does not impair the fire resistance.
Crosslinking or modification may be performed. The timing of crosslinking or modifying the thermoplastic resin is not particularly limited, and even if a previously crosslinked and modified thermoplastic resin is used, crosslinking is simultaneously performed when other components such as a phosphorus compound and an inorganic filler described later are blended. Or modification, or crosslinking or modification after blending other components with the thermoplastic resin.

Regarding the method for crosslinking the thermoplastic resin,
There is no particular limitation, and a cross-linking method generally used for thermoplastic resins, for example, a cross-linking method using various cross-linking agents, peroxides, and the like, a cross-linking method using electron beam irradiation, and the like can be mentioned.

The synthetic rubber is not particularly limited, and includes, for example, butyl rubber (IIR).

The phosphorus compound is not particularly restricted but includes, for example, various phosphoric esters such as red phosphorus, triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, xylenyl diphenyl phosphate, and sodium phosphate. Metal phosphates, such as potassium phosphate, echinesium phosphate, etc., ammonium polyphosphates, and compounds represented by the following general formula (1) are preferred, and ammonium polyphosphates are most preferred in terms of performance, safety, cost and the like. .

[0018]

(Equation 1)

In the formula, R ¹ and R ³ are hydrogen, C ¹ -C 1
6 represents a linear or branched alkyl group or an aryl group having 6 to 16 carbon atoms. R ² is a hydroxyl group, a linear or branched alkyl group having 1 to 16 carbon atoms, a linear or branched alkoxyl group having 1 to 16 carbon atoms, or an aryl group having 6 to 16 carbon atoms, or , Carbon number 6-1
6 represents an aryloxy group. The phosphorus compounds may be used alone or in combination of two or more.

Addition of a small amount of red phosphorus improves the flame retardant effect. Commercially available red phosphorus can be used as the red phosphorus, but those obtained by coating the surface of red phosphorus particles with a resin are preferably used from the viewpoints of moisture resistance and safety such as not spontaneously igniting during kneading.

The ammonium polyphosphates are not particularly limited, and include, for example, ammonium polyphosphate and melamine-modified ammonium polyphosphate. Commercially available products include, for example, “AP422” (trade name, manufactured by Hoechst),
"AP462", manufactured by Chisso Corporation, trade name "TERAGE C8"
0 "and the like.

The compound represented by the general formula (1) is not particularly restricted but includes, for example, methylphosphonic acid, dimethyl methylphosphonate, diethyl methylphosphonate, ethylphosphonic acid, propylphosphonic acid, butylphosphonic acid, 2-methyl Propylphosphonic acid, t-butylphosphonic acid, 2,3-dimethyl-butylphosphonic acid, octylphosphonic acid, phenylphosphonic acid, dioctylphenylphosphonate, dimethylphosphinic acid, methylethylphosphinic acid, methylpropylphosphinic acid, diethylphosphinic acid, Examples include dioctylphosphinic acid, phenylphosphinic acid, diethylphenylphosphinic acid, diphenylphosphinic acid, and bis (4-methoxyphenyl) phosphinic acid. Among them, t-butylphosphonic acid is
Although expensive, it is preferred in terms of high flame retardancy.

The neutralized heat-expandable graphite is obtained by neutralizing heat-expandable graphite which is a conventionally known substance. The heat-expandable graphite is made of natural scaly graphite, pyrolytic graphite, quiche graphite, etc.
Graphite intercalation compounds formed by treating with inorganic acids such as nitric acid and selenic acid and strong oxidizing agents such as concentrated nitric acid, perchloric acid, perchlorate, permanganate, dichromate and hydrogen peroxide And a crystalline compound that maintains the layered structure of carbon.

The heat-expandable graphite obtained by the acid treatment as described above is further neutralized with ammonia, an aliphatic lower amine, an alkali metal compound, an alkaline earth metal compound, etc. The resulting heat-expandable graphite. Commercially available products of the neutralized heat-expandable graphite include, for example,
"GREP-EG" manufactured by Tosoh Corporation and the like.

The aliphatic lower amine is not particularly restricted but includes, for example, monomethylamine, dimethylamine, trimethylamine, ethylamine, propylamine, butylamine and the like.

The alkali metal compound and alkaline earth metal compound are not particularly restricted but include, for example, hydroxides, oxides, carbonates, sulfates and organic acid salts of potassium, sodium, calcium, barium, magnesium and the like. Is mentioned.

The particle size of the neutralized heat-expandable graphite is 2
0-200 mesh is preferred. If the particle size is smaller than 200 mesh, the degree of expansion of graphite is small and a sufficient refractory heat insulating layer cannot be obtained. If the particle size is larger than 20 mesh, there is an advantage that the degree of expansion of graphite is large, but there is an advantage that it is kneaded with a thermoplastic resin. This is because the dispersibility deteriorates when performing the process, and a decrease in physical properties cannot be avoided.

The inorganic filler is not particularly restricted but includes, for example, metal oxides such as alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide and ferrite, calcium hydroxide, Hydrous inorganic substances such as magnesium hydroxide, aluminum hydroxide, hydrotalcite, etc., metal carbonates such as basic magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, strontium carbonate, barium carbonate, calcium sulfate, gypsum fiber, calcium silicate, etc. Calcium salt, silica, diatomaceous earth, dawnite, barium sulfate, talc, clay, mica, montmorillonite, bentonite, activated clay, sebiolite, imogolite, sericite, glass fiber, glass beads, silica-based balun, aluminum nitride, boron nitride, Nitriding Arsenide, carbon black, graphite, carbon fiber, carbon balloon, charcoal powder, various metal powders,
Examples include potassium titanate, magnesium sulfate, lead zirconate titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powders, slag fiber, fly ash, dehydrated sludge, and the like. Among them, hydrous inorganic substances and metal carbonates are preferred.

The water-containing inorganic substance absorbs heat due to water generated by a dehydration reaction at the time of heating, so that the temperature rise is reduced, high heat resistance is obtained, and an oxide remains as a heating residue. It is particularly preferable in that it works as a material to improve residue strength.

Magnesium hydroxide and aluminum hydroxide have different temperature ranges in which the dehydrating effect is exhibited. Therefore, when used in combination, the temperature range in which the dehydrating effect is exhibited is expanded, and a more effective temperature rise suppressing effect is obtained. Is preferred.

When ammonium polyphosphate is used as the phosphorus compound, the metal carbonate is considered to promote expansion by a reaction with ammonium polyphosphate. In addition, it acts as an effective aggregate and forms a residue having high shape retention after burning.

In general, since the inorganic filler acts as an aggregate, it is considered that it contributes to the improvement of the residue strength and the increase of the heat capacity. The inorganic filler may be used alone or in combination of two or more.

Commercially available inorganic fillers include, for example, aluminum hydroxide "H-4" manufactured by Showa Denko KK
2M "," H-31 ", manufactured by Shiraishi Calcium Co., Ltd., calcium carbonate, trade names" Whiteton SB Red "," BF30
0 "and the like. In addition, it is preferable to use a combination of a large particle size and a small particle size, because the combination enables higher filling.

A plate made of a noncombustible material is adhered to the inner surface of the outer box and the outer surface of the inner box, which are opposite to each other, to the surface opposite to the surface on which the fire-resistant expansion sheet is adhered. You may. The plate material made of a non-combustible material is not particularly limited, for example, calcium silicate plate, fiber-mixed calcium silicate plate, calcium carbonate plate, gypsum board, reinforced gypsum plate, inorganic plate such as slag gypsum plate, rock wool insulation plate, Ceramic wool blanket, alumina silica fiber felt, ceramic paper, aluminum hydroxide paper and the like can be mentioned.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fireproof safe according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an example of the fireproof safe according to the first aspect of the invention, FIG. 2 is a partially enlarged sectional view of the fireproof safe according to the first aspect of the invention shown in FIG. 1, and FIG. It is a partial expanded sectional view of the fireproof safe of the invention.

[Embodiment 1] In FIG. 1, reference numeral 1 denotes a safe main body, a door 2 is hinged to a front opening, and a caster 3 is attached to a bottom surface. Safe body 1
Is composed of an outer box 11 and an inner box 12.

As shown in FIG. 2, butyl rubber 42
Parts by weight, polybutene 50 parts by weight, hydrogenated petroleum resin 8 parts by weight,
Ammonium polyphosphate 100 parts by weight, thermally expandable graphite 30 parts by weight, aluminum hydroxide 50 parts by weight, calcium carbonate 100
A 4 mm thick fire-resistant intumescent sheet 4 obtained by kneading and extruding the mixture in parts by weight with a twin-screw extruder was attached to the entire inner surface of the outer box 11 to obtain a fire-resistant safe.

Example 2 A mixture of 42 parts by weight of butyl rubber, 50 parts by weight of polybutene, 8 parts by weight of hydrogenated petroleum resin, 100 parts by weight of ammonium polyphosphate, 50 parts by weight of thermally expandable graphite, and 130 parts by weight of aluminum hydroxide was prepared. A fire-resistant safe was obtained in the same manner as in Example 1 except that a 3 mm-thick fire-resistant inflatable sheet obtained by kneading extrusion molding was adhered to the entire inner surface of the outer box 11.

Example 3 Metallocene polyethylene 100
100 parts by weight of ammonium polyphosphate, 30 parts by weight of heat-expandable graphite, 50 parts by weight of aluminum hydroxide, obtained by kneading and extruding a mixture of 100 parts by weight of calcium carbonate,
A fire-resistant safe was obtained in the same manner as in Example 1 except that a fire-resistant intumescent sheet having a thickness of 4 mm was adhered to the entire inner surface of the outer box 11.

Embodiment 4 As shown in FIG.
It was obtained by kneading and extruding a mixture of 42 parts by weight of butyl rubber, 50 parts by weight of polybutene, 8 parts by weight of hydrogenated petroleum resin, 100 parts by weight of ammonium polyphosphate, 50 parts by weight of thermally expandable graphite, and 130 parts by weight of aluminum hydroxide. Example 1 except that the fire-resistant intumescent sheet 4 having a thickness of 2 mm was adhered to the entire inner surface of the outer box 11 and the rock wool board 5 made of rock wool having a thickness of 10 mm was adhered to the outer surface of the inner box 12. I got the fire safe in the street.

The fireproof safes obtained in the above Examples 1 to 4 were subjected to a fireproof test in accordance with JIS S1037, and the inside temperature after one hour was measured. Table 1 summarizes the composition of the fire-resistant expansible sheet and the results of the fire resistance test.

[0042]

[Table 1]

As is clear from Table 1, it can be seen that all the fireproof safes of Examples 1 to 4 sufficiently satisfy the fire resistance performance for one hour specified in JIS S1037.

[0044]

Since the fire-resistant safe of the present invention is constructed as described above, it is lightweight, and can be easily moved and installed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a fireproof safe according to the present invention.

FIG. 2 is a partially enlarged sectional view of the fireproof safe according to the first embodiment shown in FIG. 1;

FIG. 3 is a partially enlarged sectional view of the fireproof safe according to the second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Safe main body 2 Door 3 Caster 4 Fireproof expansion sheet 5 Rock wool board 11 Outer box 12 Inner box

Claims (2)

[Claims] 1. A fire-resistant safe comprising an outer box and an inner box, wherein a fire-resistant expansible sheet is attached to either the inner surface of the outer box or the outer surface of the inner box. 2. The fire-resistant expansible sheet according to claim 1, wherein the heat-expandable sheet is a thermoplastic resin and / or
3. The fire-resistant safe according to claim 1, comprising a mixture of a synthetic rubber, a phosphorus compound, neutralized heat-expandable graphite, and an inorganic filler.