JP5479690B2 - Fireproof metal folded plate roof laminated structure - Google Patents

Description

  The present invention relates to a metal folded plate roof laminated structure, and more specifically, to a fire resistant metal folded plate roof laminated structure having excellent fire resistance that passes the roof fire resistance 30 minute certification test.

  2. Description of the Related Art Conventionally, as a metal folded plate roof laminated structure having heat insulation, a metal roof obtained by molding a resin roof and an inorganic fiber layer bonded with an adhesive is used. Patent Documents 1 and 2 have been proposed for the purpose of providing a noise reduction function due to rain sound or the like. The metal folded plate roof laminated structure of Patent Document 1 is a heat-insulated metal roof material that has been subjected to bending processing as a whole, and the main component is a metal plate and an acrylate ester composed of butyl acrylate and 2-ethylhexyl acrylate. The resin layer of the acrylic ester copolymer, the metal sheet, and the foam sheet are laminated in this order to have a heat insulating structure integrated. The metal folded plate roof laminated structure of Patent Document 2 is a heat insulating metal roof material that is entirely bent, and includes a metal plate, at least an acrylate polymer, a halogen-containing phosphate, and an inorganic material. It has a heat insulating structure in which a resin layer made of a flame-retardant vibration-damping resin composition containing a flame retardant, a metal sheet, and a foam sheet are laminated and integrated in this order.

  In a metal folded plate roof laminated structure, as a foam sheet, what consists of polyolefin resin foam is normally used. Polyolefin resin foams are used in a wide range of fields such as building materials, home appliances, automobiles, energy, and toys because of their excellent light weight, heat insulation, water resistance, and chemical resistance. Since polyolefin-based resins themselves are easily flammable, in an area where flame retardancy is required, inorganic flame retardants such as aluminum hydroxide and magnesium hydroxide are blended to impart flame retardancy. Yes.

  However, in the field where fire resistance is required, such as the building material field, the above-described resin foam has a small effect of suppressing the temperature rise of the steel sheet that causes strength deterioration of the steel sheet, and its influence on the improvement of fire resistance is negligible.

Japanese Patent No. 3625576 JP 11-270063 A

  The metal folded plate roof laminated structure has different fire resistance depending on the type of steel plate, thickness, shape, size between beams, and the like. In addition, in the metal folded plate roof laminated structure, a resin foam and an inorganic fiber-based heat insulating material are bonded to the indoor side in order to prevent condensation, but the resin foam has a fireproof performance as described above. Since the effect on the improvement of the structure is slight, it could not be applied depending on the design of the metal folded plate roof laminated structure.

  The present invention has been made in view of the above problems, and is a metal folded plate roof laminated structure using a resin foam, has excellent fire resistance, and passes the roof fire resistance 30-minute certification test. An object of the present invention is to provide a fire-resistant metal folded plate roof laminated structure capable of performing the above.

  As a result of various investigations to achieve the above object, the present inventors have determined that a metal folded plate roof laminated structure is a steel plate / metal foil / resin foam or a steel plate / resin foam / metal foil laminate structure. It has been found that the fire resistance can be drastically improved.

This invention is made | formed based on the said knowledge, and provides the fireproof metal folded-plate roof laminated structure of following (1)-( 4 ).
(1) A fireproof metal folded plate roof laminated structure composed of a steel plate, a metal foil and a resin foam, wherein the metal foil is bonded to one side of the steel plate, and the thickness of the metal foil is 6 to 30 μm. And a fire-resistant metal folded plate roof laminated structure (first invention), wherein the resin foam is bonded to the metal foil.
(2) A fireproof metal folded plate roof laminated structure composed of a steel plate, a resin foam and a metal foil, wherein the resin foam is bonded to one side of the steel plate, and the metal foil is bonded to the resin foam And the thickness of the said metal foil is 6-30 micrometers, The fireproof metal folded-plate roof laminated structure (2nd invention) characterized by the above-mentioned .
(3) The fire-resistant metal folded plate roof laminated structure according to (1) or (2), wherein the metal foil is an aluminum foil.
(4) The fire-resistant metal folded plate roof laminated structure according to any one of (1) to (3), wherein the resin foam has flame retardancy .

  The roof fire resistance 30 minute certification test is to heat the inside of the furnace according to the heating curve of ISO834 and measure the amount of deflection and the rate of deflection of the roof specimen installed in the upper part of the furnace. It is necessary to keep the amount of deflection and the rate of deflection within a certain standard. Since the fire-resistant metal folded plate roof laminated structure of the present invention has the above-described configuration, it can effectively suppress the temperature rise of the roof steel plate itself that affects the deflection (strength) of the roof during heating. Excellent fire resistance that passes the 30-minute roof fire resistance certification test can be obtained. In the present invention, as described above, the temperature rise of the roof steel plate itself can be suppressed because the radiant heat from the burner flame which is a heating source during the fire resistance test is reflected by the metal foil having a low emissivity, and the metal folded plate This is because the temperature rise of the roof itself is suppressed.

  The fire-resistant metal folded-plate roof laminated structure of this invention has the outstanding fire resistance which passes a roof fire-proof 30 minute certification test. In addition, the laminated structure of the first invention having a laminated structure of steel plate / metal foil / resin foam, as a secondary effect, is damped by the strength of the adhesive between the steel plate and the metal foil and the type and thickness of the metal foil. It can be expected to improve the performance. In addition, the laminated structure of the second invention having a laminated structure of steel plate / resin foam / metal foil has, as a secondary effect, improved indoor illuminance by light reflection of the metal foil and dirt adhesion due to the conductivity of the metal foil. Improvement, improvement of durability of the resin foam by cutting ultraviolet rays with a metal foil, and the like can be expected.

  Hereinafter, the present invention will be described in more detail. As shown in FIG. 1, the metal folded plate roof laminated structure of the first invention is composed of a steel plate 10, a metal foil 12 and a resin foam 14, and the metal foil 12 is bonded onto the steel plate 10. The resin foam 14 is adhered on the top. As shown in FIG. 2, the folded metal plate roof laminated structure of the second invention is composed of a steel plate 10, a resin foam 14 and a metal foil 12, and the resin foam 14 is bonded onto the steel plate 10 to form a resin foam. A metal foil 12 is bonded on the body 14. The metal folded plate roof laminated structures of the first and second inventions are bent as a whole, and peaks and valleys are alternately formed in the left-right direction in the figure.

  In the present invention, a steel sheet having a thickness of about 0.3 to 1.5 mm can be suitably used.

In the present invention, the metal foil plays a role of reflecting radiant heat from the heating source because of its excellent emissivity. Further, the metal foil has a smaller surface roughness and can reflect radiant heat as the gloss becomes stronger. As the metal foil, aluminum foil, copper foil, silver foil, gold foil or the like can be used, and aluminum foil is particularly preferable. The thickness of the metal foil is suitable to be 6 30 .mu.m.

  In the present invention, the resin foam functions as a heat insulating material and at the same time exhibits a dew condensation preventing effect. As the resin foam, a polyolefin resin foam can be suitably used. For example, low density polyethylene, linear low density polyethylene, high density polyethylene, ethylene-α-olefin copolymer, ethylene-propylene copolymer are used. A single polymer or a mixture of two or more of a polymer, an ethylene-vinyl acetate copolymer, an ethylene-ethyl acrylate copolymer, an ethylene-vinyl acetate-vinyl chloride copolymer, an ethylene-acrylic acid copolymer, etc. Foam can be used. In these, the foam which consists of a low density polyethylene, a linear low density polyethylene, a high density polyethylene, and an ethylene-vinyl acetate copolymer is especially preferable. Further, as the resin foam, a foam having a closed cell structure, particularly a crosslinked foam having a closed cell structure is preferable.

In the present invention, the density of the resin foam is preferably 0.02 to 0.2 g / cm ³ , and particularly preferably 0.02 to 0.06 g / cm ³ . In the case of a resin foam having a density of less than 0.02 g / cm ³ , bubbles are likely to be broken during bending using a roll forming apparatus, and it becomes difficult to form a heat insulating layer having a predetermined thickness. Moreover, in the case of a resin foam larger than 0.2 g / cm ^{3, a} tendency of decreasing the heat insulation effect may begin to appear.

  In addition, if the thickness of the resin foam is too thin, a tendency to decrease the heat insulation effect and the anti-condensation effect starts to appear, and conversely, if it is too thick, it becomes difficult to bend when using a roll forming device, so the thickness is It is preferable that it is 2-30 mm, and it is especially preferable that it is 3-15 mm.

  In the present invention, the resin foam preferably has flame retardancy. Examples of means for imparting flame retardancy to the resin foam include means for adding a flame retardant to the resin foam. There are no particular restrictions on the type of flame retardant, but examples include aluminum hydroxide, magnesium hydroxide, antimony trioxide, titanium oxide, zinc oxide, aluminum oxide, calcium carbonate, lithium carbonate, magnesium carbonate, talc, mica, kaolin, and shirasu. Inorganic flame retardants such as balloons and hollow ceramics can be used. Among these, aluminum hydroxide, magnesium hydroxide, and antimony trioxide are particularly preferable. Further, as flame retardants, tris (chloroethyl) phosphate, tris (dichloropropyl) phosphate, bis (2,3-dibromopropyl) 2,3-dichloropropyl phosphate, tris (2,3-dibromopropyl) phosphate, bis (chloro) Organic flame retardants such as propyl) monophenyl phosphate, bis (chloropropyl) monooctyl phosphate, tris (bromochloropropyl) phosphate may be used. A flame retardant may be used individually by 1 type, and 2 or more types may be mixed and used for it.

  In addition to the above components, the resin foam used in the present invention includes a crystallization nucleating agent, a crystallization accelerator, a bubble nucleating agent, an antioxidant, an antistatic agent, an ultraviolet light inhibitor, a light stabilizer, a fluorescent enhancement agent. Various additives such as whitening agents, pigments, dyes, compatibilizers, lubricants, reinforcing agents, cross-linking agents, cross-linking aids, plasticizers, thickeners and thickeners may be blended.

  In the present invention, for example, an acrylic urethane-based, acrylic-based, urethane-based, polyester-based, SBR-based, ionomer-based adhesive, or the like is used as an adhesive for bonding a steel plate and a metal foil, and a metal foil and a resin foam. Can do.

  EXAMPLES Hereinafter, although this invention is demonstrated further in detail based on an Example and a comparative example, this invention is not limited to the following Example.

The laminated structures of Reference Examples 1 to 3 , Examples 1 to 3 , and Comparative Examples 1 and 2 having the configurations shown in Table 1 below were produced. In this case, as the flame-retardant resin foams in Reference Examples 1 to 3, Examples 1 to 3 and Comparative Example 1, Furukawa Electric Co., Ltd. Funenace (density 43 kg / m ³ , thickness 4 mm), Comparative Example 2 the inorganic fiber-based insulation, Sekisui Chemical Co., Ltd. Jifunen (density: 140 kg / ^{m 2,} thickness 5mm) was used. About various aluminum foil, the alloy number A1N30-O material which is the pure aluminum type by Nippon Foil Co., Ltd. was used.

Moreover, the evaluation samples of Reference Examples 1 to 3 and Examples 1 to 3 include a 300 mm square first layer (flat steel plate 10) and a 250 mm square second layer (aluminum foil 12 or flame retardant resin foam 14). ) And the third layer (resin foam 14 or aluminum foil 12) were laminated using spray paste for heat insulating material. In the evaluation samples of Comparative Examples 1 and 2, spray glue is used for the first layer (flat steel plate) of 300 mm square size and the second layer (flame retardant resin foam or inorganic fiber-based heat insulating material) of 250 mm square size. A laminate was used. Moreover, about all the evaluation samples using an aluminum foil, it laminated | stacked so that the glossy surface side might become a heating side.

The experiment was performed as shown in FIG. That is, an ALC plate (lightweight cellular concrete plate) 24 having a 250 mm square penetrating portion 22 is installed on the upper surface of the small horizontal refractory furnace 20, and the evaluation sample 26 is placed on the lower surface of the ALC plate 24 with the third layer or the second layer. It is attached by fixing the four corners with bolts so that the two layers are inside the furnace. On the inside of the furnace, a ceramic blanket 30 having a 200 mm square size through part 28 is provided at the center part of the through part 28 and the center part of the sample 26. Installed to match. The furnace 20 was heated by a burner 30 using LP gas as fuel in accordance with the ISO 834 standard curve, and the temperature rise of the steel plate 10 was confirmed by a thermocouple installed on the steel plate 10 side of the evaluation sample 26. The fire resistance was evaluated according to the following items 1 and 2.
1. 500 ° C. arrival time: Heat resistance was determined based on the time required for the steel plate temperature to reach 500 ° C. (500 ° C. is the time when the decrease in steel plate strength is considered to be large).
2. Final temperature: was determined by Ri耐 heat to the steel plate temperature of 30 minutes after heating.

  The results are shown in Table 1. From Table 1, it was confirmed that the metal folded-plate roof laminated structure of this invention has the outstanding fire resistance.

It is sectional drawing which shows an example of the metal folded plate roof laminated structure of this invention. It is sectional drawing which shows an example of the metal folded plate roof laminated structure of this invention. It is explanatory drawing which shows the experiment in an Example.

Explanation of symbols

10 Steel plate 12 Metal foil 14 Resin foam

Claims (4)

  It is a fireproof metal folded plate roof laminated structure composed of a steel plate, a metal foil and a resin foam, the metal foil is bonded to one side of the steel plate, and the thickness of the metal foil is 6 to 30 μm, A fireproof metal folded plate roof laminate structure, wherein the resin foam is bonded to a metal foil. It is a fireproof metal folded plate roof laminated structure composed of a steel plate, a resin foam and a metal foil, the resin foam is bonded to one side of the steel plate, the metal foil is bonded to the resin foam , A fire-resistant metal folded plate roof laminated structure , wherein the thickness of the metal foil is 6 to 30 μm .   The fire-resistant metal folded plate roof laminated structure according to claim 1 or 2, wherein the metal foil is an aluminum foil.   The fireproof metal folded plate roof laminated structure according to any one of claims 1 to 3, wherein the resin foam has flame retardancy.

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