JP3062367U - 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 by simply applying a heat-insulating coating material to the surface of a metal molded tile, and requiring a seaming board or the like on the back surface. In addition, the present invention provides a metal heat-insulating roofing material which is greatly improved and has an excellent appearance. SOLUTION: On a surface of a metal molded roof tile formed by press-molding a metal thin plate, an alkali metal silicate aqueous solution, kneaded ceramic fine hollow particles, ceramic waste ground particles, siliceous fine powder, glass powder, and an alkali metal silicate hardener are kneaded. A heat insulating coating material is applied as a surface layer, and after drying, 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, the metal roofing material was made to take advantage of the characteristics of metal, such as long tiled roofs and good rain performance.However, the monotonousness of the design led to the commercialization of metal molded tiles. 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 is composed of an alkali metal silicate aqueous solution, ceramic fine hollow particles, ceramic waste ground particles, siliceous fine powder, glass powder, and alkali metal silicate. A heat insulating coating material kneaded with a salt hardener is applied as a surface layer, dried, and then a fluororesin is applied to 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.

[0009] 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 forms ceramic fine hollow particles into ceramic waste ground particles, siliceous fine powder, and glass powder. And an alkali metal silicate hardener. After applying and drying this heat-insulating coating material, a fluororesin is applied to the surface.

Since the alkali metal silicate aqueous solution used in the present invention forms a strong glassy film, the general formula is represented by M ₂ O.nSiO ₂ .nH ₂ O, and the type of alkali metal M is There are sodium, potassium and lithium.

[0011] The alkali metal silicate hardener is added to make the alkali metal silicate aqueous solution into a hard glassy hardened product. Acids such as sodium silicate, magnesium silicate fluoride and ammonium chloride, water, etc. Hydroxides of alkali metals such as sodium oxide, potassium hydroxide and lithium hydroxide; carbonates of alkali metals such as sodium carbonate and potassium carbonate; hydroxides of alkaline earth metals such as calcium hydroxide and magnesium hydroxide; Polyvalent metal oxides such as zinc oxide, alumina, cement, calcium silicate, etc., polyvalent metal powders such as zinc and aluminum, and metals of acidic oxides such as aluminum phosphate, magnesium phosphate, aluminum borate, calcium borate Salt and the like can be used. These may be used alone or in combination of two or more. Of the above, alkali metal hydroxides can be more preferably used.

Further, various surfactants, anti-sagging agents, anti-settling agents, anti-freezing agents and the like may be added as a dispersant in order to improve properties as required. Further, for the purpose of improving the performance, a plasticizer which gives flexibility, a stabilizer which prevents deterioration due to heat and light, and a fungicide which prevents the occurrence of mold may be added.

The heat reflection efficiency is enhanced by mixing the ceramic fine hollow particles, and the particles having low thermal conductivity are combined with each other to exhibit excellent heat insulating properties. It can be a finished surface. By applying a fluororesin after drying, the weather resistance can be further improved.

As the filler of the heat insulating coating material, fine hollow ceramic 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, spraying, and roller application of the raw materials, so that a stone-grain or brick-like surface having light brightness cannot be obtained.

The hollow ceramic fine 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. Therefore, it is not broken at all under the kneading conditions in the heat insulating coating material manufacturing process, nor is it broken at all during the coating process on the base material 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 ceramic fine hollow particles are uniformly dispersed on the surface of the coating film, and reflect light to exhibit excellent gloss and light brightness. That is, the fine ceramic hollow particles have a small particle size and are transparent or translucent in appearance, reflect most of the heat when irradiated with light, exhibit extremely high gloss and brightness, and have a stone-grained or brick-like texture. Can be expressed. The ceramic fine hollow particles are 100% perfectly spherical. The compressive strength of conventional fine hollow particles is 80 to 300 kgf / cm ² , and such an effect cannot be obtained due to the small number of completely hollow spheres.

Particularly important when using the ceramic fine hollow particles in the heat insulating coating material are the heat reflection efficiency and the heat conductivity. The heat reflection efficiency of the ceramic fine hollow particles is as high as 70 to 80%, and the thermal conductivity is very excellent at around 0.1 (kcal / mhr ° C). Approximately half of conventional fine hollow particles are destroyed, so that the thermal conductivity is 0.2 to 0.1. 3 (kcal / mhr ° C). Only when completely fine hollow particles with high pressure resistance, which are not destroyed, are used, the effect of excellent heat insulation and sound insulation can be exhibited as a heat insulating roofing material.

The melting point of the hollow ceramic fine 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.). Is what it is. The particle size of the ceramic fine hollow particles is in the range of 5 to 350 μm, and the fineness is adjusted to 20 to 50 parts by weight, and the fineness is adjusted to 20 to 50 parts by weight. Parts, and 30 parts by weight of the mixture. The bulk specific gravity is heavy for fine particles and light for rough ones. For this reason, the range of the bulk specific gravity is 0.3 to 0.5 g / cm ³ , but that of which the particle size is adjusted is about 0.36 g / cm ³ .

The crushed ceramic waste particles used in the present invention are obtained by crushing defective products generated in the porcelain production process. The pottery here includes pottery, pottery, stoneware, and porcelain.Specific products include black clay tiles, bricks, clay pipes, earthen pipes, pottery tiles, interior and exterior tiles, sanitary ware, etc. Porcelain includes interior and exterior tiles, floor tiles, mosaic tiles, sanitary ware, etc. To use.

[0020] The ground ceramic waste particles are fine, medium, and coarse, and the fine particle diameter is 0.005 to 0.1 mm, the medium is 0.1 to 1.5 mm, and the coarse is 1.5 to 1.5, respectively. Adjust to 3.4 mm before use. In addition to the crushed ceramic waste particles, silica powder, fly ash, silica fume, clay, talc, kaolin, slow-cooled blast furnace slag slag, siliceous dust and the like may be added as necessary.

The color of the ground ceramic waste particles differs depending on the original ceramic product, and a unique texture can be obtained by blending them in various ways. For example, the addition of an appropriate amount of white mesh particles of sanitary ware waste particles to the coarse and fine particles of the ground brick particles makes it possible to express a completely new tile-like pattern that did not exist before.

As the siliceous fine powder used in the present invention, silica fume, fly ash, silica sand, silica stone powder, clay, kaolin, talc, slowly cooled blast furnace slag fine powder, blast furnace granulated slag, siliceous dust, etc. can be used. . These preferably have an average particle size of about 1 μm and a specific surface area of 200,000 cm ² / g or more. Suitable are silica fume, silica powder, blast furnace slag fine powder, and the like.

The glass powder used in the present invention is most preferably a silicate glass in an oxide glass made of Na ₂ O—CaO—SiO ₂ based soda lime glass. To this glass powder, as a flux, one or two 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 diameter 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.

After applying the heat insulating coating material, a fluororesin is applied to the coating film surface. 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.

[0025]

【Example】

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

Example 1 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 prepared by press molding a 0.4 mm thick galvalume steel plate. On the surface of the metal molded roof tile to be the outdoor surface, 100 parts by weight of an aqueous solution of sodium silicate consisting of 9.4% by weight of Na ₂ O and 29.4% by weight of SiO ₂ have a compressive strength of 700 kgf / cm ² and a bulk density of 0.3 to 0.3%. 0.5 g / cm ³ , melting point of 1600 ° C., thermal conductivity of 0.1 (kcal / mhr ° C.), fine particle size of fine ceramic hollow particles composed of only completely hollow particles 150 parts by weight, pulverized brick waste Fine particles of 30 parts by weight, coarse 5 parts by weight, and 20 parts by weight of ground white sanitary garbage waste particles were added to adjust the particle size. 250 parts by weight of ground ceramic waste particles, 30 parts by weight of silica fume, 25 parts by weight of glass powder Parts, 8 parts by weight of sodium hydroxide, a little amount of water, and other appropriate amounts of a dispersant, a stabilizer, and the like were added to the admixture to prepare a heat insulating coating material, which was kneaded sufficiently, and then applied to a thickness of 3 mm. After drying the heat-insulating coating material, a fluororesin was applied to the surface to produce a heat-insulating roof material.

Example 2 In Example 1, a heat-insulating coating material was applied to a metal-formed roof tile, dried and heated at 120 ° C. for 30 minutes to vitrify the surface. Was applied to produce an insulated roofing material.

[0028]

[Effect of the invention]

 The heat-insulated roofing material produced in this way has excellent thermal insulation properties equivalent to or better than conventional metal roofing materials with a sheathing board attached to the back of a steel plate, using ceramic fine hollow particles with high heat reflection performance and heat insulation performance. The effect and soundproofing effect were able to be exhibited. In addition, the surface of the heat-insulating roof material has a beautiful stone-like or brick-like appearance, and the light is diffused softly and diffusely reflected by the fine ceramic hollow particles, so that the heat-insulating roof material can be settled down and coated with fluororesin. As a result, excellent weather resistance, heat resistance, and cold resistance were able to be improved.

The use of rejected crushed particles generated during the production process of porcelain made it possible to make effective use of porcelain waste disposed of as industrial waste.

[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 roofing 6. Absolutely 7. Corner patch

Claims (1)

[Utility model registration claims] 1. A surface of a metal-formed roof tile formed by press-molding a thin metal plate, an alkali metal silicate aqueous solution is mixed with fine ceramic hollow particles, ground ceramic waste particles, siliceous fine powder, glass powder, and an alkali metal silicate hardener. A heat-insulating roofing material characterized in that a heat-insulating coating material is applied as a surface layer, dried and then a fluororesin is applied to the surface.