JP3047180U - Insulated roofing material - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To increase the durability of a metal roofing material and to provide heat insulation and soundproofing properties only by applying a heat-insulating coating material on the surface of a metal-molded tile, and requiring a seeing board or the like on the back surface. The present invention provides a significantly improved metal insulation roofing material. An alkali metal silicate aqueous solution having a compressive strength of 600 kgf is applied to the surface of a metal-molded roof tile formed by pressing a thin metal plate.
/ Cm ² or more, bulk specific gravity 0.3-0.5 g / cm ³ , melting point 1500 ° C. or more, and applying as a surface layer a heat insulating coating material kneaded with ceramic fine hollow particles, glass powder, silica flour, and natural crushed stone particles. After drying, it is heated at 100 to 300 ° C., and after slow cooling, a fluororesin is applied to the surface.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention is a heat-insulating roofing material that is made of a thin metal sheet with excellent heat insulation and soundproofing properties that can express a sense of quality without damaging the landscape.

[0002]

[Prior art]

 With the advent of colored iron plate coils, metal roofing materials made use of the characteristics of metal, such as long tiled roofs and good rain performance. Was. Although the metal molding tile has a design property, it has the drawback that, like the roof tile, it is cheap, hot, noisy by rain, and rusts immediately.

[0003] To compensate for such a drawback, a long vertical-roofed metal tile has appeared. This long vertical roofing metal tile is made of ultra durable steel. It is roll-formed into a corrugated form using a fluororesin steel sheet as an original sheet, and then special continuous press forming. However, metal roofing materials have various drawbacks, such as the cheap iron plate, lack of heat insulation, noisy hot and rainy noise, rusting and lack of durability, and there is a strong sense of distrust.

[0004] There is a technology in which a steel sheet whose weather resistance is improved by baking coating of a fluororesin is used, and silica sand is baked on the surface of the steel sheet with a fluororesin to finish ricin. However, since the fluororesin is used, the weather resistance is reduced. The heat resistance and sound insulation were not improved, but the effect was not obtained unless a sealing board was provided on the back side of the steel sheet.

[0005]

[Problems to be solved by the invention]

 The present invention has been made in view of such circumstances, and thus, the durability and durability of metal roofing materials have been increased, and the heat insulation and soundproofing properties, which have been regarded as the biggest problems, are only applied to the surface of the metal-molded tile by applying a heat-insulating coating material. The purpose of the present invention is to provide a thermally insulated metal roofing material that does not require a sealing board or the like on its rear surface and is greatly improved.

[0006]

[Means for Solving the Problems]

The insulated metal roofing material of the present invention has a compressive strength of 600 kgf / cm ² or more and a bulk density of 0. As a surface layer, a heat insulating coating material in which ceramic fine hollow particles having a melting point of 1500 ° C. or more, glass powder, silica flour, and natural crushed stone particles having a melting point of ^{3 to} 0.5 g / cm ³ or more are applied, dried and heated to 100 to 300 ° C. Apply fluororesin on the surface.

[0007]

[Embodiment of the invention]

 As the thin metal sheet used in the present invention, stainless steel, copper, aluminum, titanium, plated steel sheet, clad steel sheet, PVC steel sheet, galvalume steel sheet and the like can be used, and galvalume steel sheet is more preferable.

[0008] The galvalume steel sheet is a hot-dip aluminum / zinc alloy-plated steel sheet. Since it has both the corrosion resistance, heat resistance and heat reflection properties of aluminum and the sacrificial anticorrosion effect of zinc, it can be said that it is optimal for the metal roofing material of the present invention. Galvalume steel sheets with a thickness of 0.35 to 1.6 mm depending on the roof construction method are used.

The heat-insulating coating material applied to the metal sheet surface of the heat-insulating roofing material of the present invention uses an alkali metal silicate aqueous solution as a binder, and has a compressive strength of 600 kgf / cm ² or more and a bulk density of 0.3 to 0. Glass powder, silica flour, and natural crushed stone are kneaded with ceramic fine hollow particles having a melting point of 1500 ° C. or more and a melting point of 5 g / cm ³ . This heat-insulating coating material is applied, dried, heated to 100 to 300 ° C., gradually cooled, and then coated with a fluororesin on the surface.

The reason for applying the coating material and drying it and then heating it to 100 to 300 ° C. is that the mixture obtained by mixing silica flour into an aqueous solution of an alkali metal silicate and solidifying it becomes glass and hardly soluble in water. On the other hand, transparency is increased, and a beautiful finished surface can be obtained in combination with the mixture of fine ceramic hollow particles and natural crushed stone.

In the coating material according to the present invention, in addition to the above, if necessary, a surfactant, a stabilizing emulsifier, a thickener, an anti-sagging agent, an anti-settling agent may be used to improve the properties of the coating material. May be added. Further, for the purpose of improving the performance of the coating film, a plasticizer for giving flexibility to the coating film, a stabilizer for preventing deterioration due to heat or light, a fungicide for preventing the occurrence of mold, and the like may be added.

By mixing the ceramic fine hollow particles, not only particles having low thermal conductivity are bonded to each other to exhibit excellent heat insulating properties, but also a soft and irregularly reflected light to provide a calm finished surface. . By applying a fluororesin after heating and slow cooling, the weather resistance can be further improved.

The alkali metal silicate aqueous solution used as a binder in the heat insulating coating material of the present invention forms an excellent and strong glassy film, and the general formula is represented by M ₂ O · mSiO ₂ .nH ₂ O. Examples of the kind of the alkali metal M include sodium, potassium and lithium, and a special one is a quaternary ammonium salt.

The silica flour used for the heat insulating coating material is more effective in solidifying an alkali metal silicate aqueous solution as active silica particles having a smaller particle size have an average particle size of 1 to 5 μm and a specific surface area of 200,000 cm ² / g. The above is desirable.

As the filler of the heat insulating coating material, fine ceramic hollow particles having a water pressure resistance of 600 kgf / cm ² or more are used. The hydrostatic strength is synonymous with the compressive strength of the ceramic fine hollow particles. When measuring the compressive strength of the ceramic fine hollow particles, the particles are put into water, pressure is applied to the water, and the pressure applied to the water is transmitted to the ceramic fine hollow particles to measure the compressive strength. When the water pressure resistance of the ceramic fine hollow particles is low, most of the materials are broken during kneading of the raw materials, spraying, and coating with a roller, so that a stone-grain surface having light brightness cannot be formed.

The ceramic fine hollow particles used have a compressive strength of 600 kgf / cm ² or more, a bulk density of 0.3 to 0.5 g / cm ³ , and a melting point of 1500 ° C. or more. It will not be destroyed at all under the conditions, nor will it be destroyed at all during the coating process on the substrate and the molding after coating. Moreover, the hardness of the coating film and the impact strength of the coating film can be increased, and the fine hollow ceramic particles are uniformly dispersed on the surface of the coating film, and exhibit excellent gloss and light brightness. In other words, the ceramic fine hollow particles have a small particle size and are transparent or translucent in appearance, and reflect irregularly when light is radiated, exhibit an extremely high gloss and luminance surface, and can express a stone-like texture color. It is. The ceramic fine hollow particles are 100% perfectly spherical. The compressive strength of conventional fine hollow particles is 80 to 300 kgf / cm ² .

Particularly important when using the ceramic fine hollow particles in the heat insulating coating material is thermal conductivity. Ceramic fine hollow particles are excellent at around 0.1 (kcal / mhr ° C). About half of the conventional fine hollow foams are destroyed, so that the thermal conductivity is reduced to 0.2 to 0.3 (kcal / mhr ° C.). Only when a completely fine hollow foam with high pressure resistance that is not destroyed is used, the effect of excellent heat insulation and sound insulation can be exhibited as a heat insulating roofing material.

The melting point of the ceramic fine hollow particles is 1500 ° C. or higher. Naturally, the fine ceramic hollow particles are caused by their material, but generally, the higher the melting point, the higher the compressive strength. If the compressive strength is 600 kgf / cm ² or more, its melting point becomes 1500 ° C. or more.

As described above, the ceramic fine hollow particles used in the present invention are formed by foaming a ceramic composition comprising 50 to 60% of silica, 40 to 45% of alumina, and 1.5 to 2.5% of others. Its physical properties include a compressive strength of 700 kgf / cm ² , a melting point of 1600 ° C., a bulk specific gravity of 0.3 to 0.5 g / cm ³ , and a thermal conductivity of 0.1 (kcal / m hr ° C.). I have. The diameter of the ceramic fine hollow particles is in the range of 5 to 350 μm, and the fineness is adjusted to 20 parts by weight, and the fineness is adjusted to 20 parts by weight, with the fineness being 5 to 75 μm, the medium being 75 to 150 μm, and the coarse being 150 to 350 μm. Parts, and 30 parts by weight of the mixture. The bulk specific gravity is heavy for fine particles and light for rough ones. Scope of this for a bulk specific gravity of Ru 0.3 to 0.5 g / cm ³ der, but those particle size control is 0.36 g / cm ³ before and after.

The glass powder used in the present invention is preferably a silicate glass in an oxide glass obtained by powdering a soda-lime glass of Na ₂ O—CaO—SiO ₂ system. To this glass powder, as a flux, one or more of feldspar, feldspar, magnesium carbonate, lime phosphate, lead oxide, boric acid, sodium carbonate, sodium nitrate, zinc oxide and the like are added. Is also good. The particle size of the glass powder and the flux is preferably in the range of 5 to 100 μm, and it is effective as a binder for improving the fire resistance when the insulated roofing material is heated. The addition amount of the glass powder is 10 to 30 parts by weight. If the amount is less than 10 parts by weight, the effect as a binder exhibiting fire resistance cannot be exhibited, and if the amount is more than 30 parts by weight, the strength decreases.

The natural stone used as the raw material of the natural crushed stone to be mixed with the filler of the heat insulating coating material may be any of granite, andesite, marble, serpentine and the like, and is not limited. Natural crushed stone particles are fine, medium, and coarse, and the diameters of the fine particles are 0.1 to 0.5 mm, medium is 0.5 to 1.5 mm, and coarse is 1.5 to 3.4 mm. Adjust and use. In addition to natural crushed stone particles, silica sand, silica stone powder, fly ash, clay, talc, kaolin, pulverized ceramic, pulverized blast furnace slag, and siliceous dust may be added. The particle size of the natural crushed stone is adjusted to 40 to 60 parts by weight, 30 to 40 parts by weight, and 10 to 20 parts by weight. When 10 to 30 parts by weight of natural crushed stone particles are applied to the surface of the heat-insulating roofing material, the excellent light stone-like gloss and light brightness can be most effectively expressed.

After applying the heat-insulating coating material, the coating film surface is cooled to room temperature by heating and gradually cooling, and then the fluororesin is applied. The fluororesin used here is polytetrafluoroethylene (Teflon, polyflon), which can improve the weather resistance, heat resistance, and cold resistance of the heat insulating roofing material.

[0023]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail.

Example A metal molded roof tile having a total length of 1300 mm, a working length of 1230 mm and a width of 320 mm was produced by press molding a 0.4 mm thick galvalume steel plate. Ceramic fine hollow particles having a particle size adjusted to 28% by weight of a sodium silicate aqueous solution composed of 9.4% by weight of Na ₂ O and 29.4% by weight of SiO ₂ as an aqueous solution of an alkali metal silicate are placed on the surface of the metal roof tile serving as the outdoor surface. 25 parts by weight of glass powder, 22 parts by weight of glass powder, 3% by weight of silica flower and 18.5% by weight of natural crushed stone particles obtained by crushing granite to prepare a heat insulating coating material whose main constituent material is 3 kneaded after sufficient kneading. It was applied thickly.

After drying the heat-insulating coating material of the metal-molded tile, it is heated at 120 ° C. for 60 minutes to vitrify the surface to make it less soluble in water. After slow cooling, a fluororesin is applied to the surface to produce a heat-insulating roofing material. did.

[0026]

[Effect of the invention]

 The heat-insulated roofing material thus manufactured uses ceramic fine hollow particles with high heat-insulating performance to provide an excellent heat-insulating and sound-proofing effect equal to or better than that of a conventional metal roofing material with a sheathing board attached to the back of a steel plate. I was able to demonstrate. The surface of the heat-insulating roof material has a beautiful stone-grained appearance, and the fine hollow particles of the ceramic make the light soft and diffusely reflected to create a calm, insulated roof material.By coating the surface with fluorine resin, Excellent weather resistance, heat resistance, and cold resistance were able to be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of a heat insulating roof material.

FIG. 2 is a construction drawing of a heat insulating roof material according to an embodiment.

[Explanation of symbols]

 1. 1. Insulated roofing materials Metal molded roof tile 3. Thermal insulation coating material 4. Field board 5. Asphalt 6. Absolutely 7. Corner patch

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location E04D 1/28 E04D 1/28 F

Claims (1)

[Utility model registration claims] 1. A metal molded roof tile obtained by press-molding a thin metal plate, a compressive strength of 600 kgf / cm ² or more and a bulk density of 0.3 are applied to the surface of the metal molded roof tile with an alkali metal silicate aqueous solution.
0.5 g / cm ³ , melting point of 1500 ° C. or more, heat-insulating coating material kneaded with ceramic fine hollow particles, glass powder, silica flour, and natural crushed stone particles is applied as a surface layer and dried.
A heat-insulating roofing material characterized by being heated to 00 to 300 ° C and gradually cooled, and then coated with a fluororesin on the surface.