JP2000240224A - Heat-insulating roof material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metallic heat-insulating roof material with improved durability and greatly enhanced heat-insulating property and sound proofing property without requiring any sheathing board on the back face only by applying a heat insulating paint material onto the surface of a metal molding tile. SOLUTION: In this heat-insulating roof material 1, a heat-insulating paint material 3 prepared by mixing and kneading ceramic fine hollow particles with a compression strength of 600 kgf/cm2 or more, a bulk density of 0.3-0.5 g/cm3 and a melting point of 1500 deg.C or more, ceramics waste crushed particles, and glass powder with resol type phenol resin is applied as a surface layer onto the surface of a metal molding tile 2 press-molded of a metal thin plate, and fluororesin is applied to the surface after the surface layer is dried.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-insulating roofing material made of a thin metal plate having excellent heat insulation and soundproofing properties, which can express a sense of quality without impairing the scenery.

[0002]

2. Description of the Related Art With the advent of colored iron plate coils, the use of metal roofing materials has been promoted to take advantage of the characteristics of metal, such as long tiled roofs and good rain performance. Has been commercialized. Although the metal molded tile has a design property, it has the drawbacks that it is cheap, hot, noisy by rain, and rusts immediately, like the tiled roof.

[0003] Long vertical-roofing metal tiles have appeared to compensate for such disadvantages. This long vertical roofing metal tile is made of a super durable steel sheet. This is a roll formed into a corrugated form using a fluororesin steel plate as an original plate, followed by special continuous press forming. However, the metal roofing material has various drawbacks such as a cheap iron plate which is inexpensive, does not have heat insulation, is noisy due to hot and rainy noise, and rust is generated immediately and is not durable.

[0004] There is a technique of baking silica sand with fluororesin on a steel sheet of which the weather resistance has been improved by baking and coating a fluororesin, and applying a lysine finish to this surface. However, the heat insulating property and the soundproofing property were not improved, and the effect was not obtained unless a sealing board was provided on the back side of the steel sheet.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been proposed in order to improve the durability of metal roofing materials and to provide the heat insulation and soundproofing properties, which are the most important problems, to the surface of a metal molded tile. The present invention provides a heat-insulating metal roofing material that has been significantly improved by only applying a heat-insulating coating material to the back surface thereof without requiring a sealing board or the like on the back surface.

[0006]

The heat-insulating metal roofing material of the present invention has a compression strength of 600 kgf / c on a resol-type phenolic resin on the surface of a metal-formed tile formed by pressing a thin metal plate.
m ² or more, bulk specific gravity 0.3-0.5 g / cm ³ , melting point 15
A heat insulating coating material obtained by kneading ceramic fine hollow particles of 00 ° C. or more, crushed ceramic waste particles, and glass powder is applied as a surface layer, and after drying, a fluororesin is applied to the surface.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION As the 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.

A 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 corrosion protection effect of zinc, it can be said that the metal roofing material of the present invention is optimal.
Galvalume steel sheet is 0.35 to 1.6 depending on the roof construction method.
Use a mm-thick one.

The heat-insulating coating material applied to the metal sheet surface of the heat-insulating roofing material of the present invention is a resol type phenol resin in a bander, which has a compressive strength of 600 kgf / cm ² or more and a bulk specific gravity of 0.3 to 0.5 g / cm ^2. cm ^3, is obtained by kneading a glass powder thereto ceramic waste ground particles to the melting point 1500 ° C. or more ceramic fine hollow particles. After applying and drying this heat-insulating coating material, a fluororesin is applied to the surface.

The resol type phenolic resin of the present invention is obtained by converting phenols such as phenol, cresol, xylenol, paraalkylphenol, paraphenylphenol and resorcin and modified products thereof with aldehydes such as formaldehyde, paraformaldehyde, furfural and acetaldehyde by sodium hydroxide. , Potassium hydroxide, calcium hydroxide, hexamethylenetetramine, trimethylamine, triethylamine and the like.

The curing agent used for the resole type phenol resin includes inorganic acids such as sulfuric acid and phosphoric acid, and organic acids such as benzenesulfonic acid, naphtholsulfonic acid and phenolsulfonic acid.

In order to improve the properties as required, various surfactants, thickeners, anti-sagging agents,
An anti-settling agent, an anti-freezing agent and the like may be added. Plasticizer that gives flexibility for the purpose of further improving performance, heat,
A stabilizer for preventing deterioration due to light, a fungicide for preventing the occurrence of mold, and the like may be added.

[0013] 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 light can be softly diffusely reflected to provide a calm finished surface. . By applying a fluororesin after heating and slow cooling, the weather resistance can be further enhanced.

The filler of the heat insulating coating material has a water pressure resistance of 600.
Use ceramic fine hollow particles of kgf / cm ² or more. The hydrostatic strength is synonymous with the compressive strength of the ceramic fine hollow particles. When the compressive strength of the ceramic fine hollow particles is measured, the particles are put into water and 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. If the ceramic fine hollow particles have low water pressure resistance, most of them are broken during kneading, spraying, and roller application of the raw materials, so that it is impossible to obtain a stone-grain or brick-like surface having light brightness.

The fine hollow ceramic particles used have a compressive strength of at least 600 kgf / cm ² and a bulk specific gravity of 0.3 to 0.5 g.
/ Cm ³ and a melting point of 1500 ° C. or higher, so that it is not destroyed at all under the kneading conditions in the heat-insulating coating material production process, but is completely destroyed in the application step to the base material and the molding after application. Never. In addition, 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. That is, the ceramic fine hollow particles have a small particle size and are transparent or translucent in appearance, irregularly reflected when irradiated with light, exhibit an extremely high gloss and luminance surface, and can express a stone-like or brick-like texture color. You can. The ceramic fine hollow particles are 100% perfectly spherical. Conventional fine hollow particles have a compressive strength of 80 to 300.
kgf / cm ² , and such an effect could not be obtained because the number of completely hollow spheres was small.

Particularly important when using the ceramic fine hollow particles in the heat insulating coating material is thermal conductivity. The ceramic fine hollow particles are excellent at around 0.1 (kcal / mhr ° C.). Most of the conventional fine hollow particles are destroyed, so that the thermal conductivity is 0.2 to 0.3 (k
cal / mhr ° C). Only when completely fine hollow particles having high pressure resistance which are not broken 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 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 composed of 50-60% of silica and 40% of alumina.
-45%, and other 1.5-2.5% ceramic composition foamed and formed, having physical properties of a compressive strength of 700 kgf / cm ² , a melting point of 1600 ° C., and a bulk specific gravity of 0.3.
０．５0.5 g / cm ³ , thermal conductivity 0.1 (kcal / mh)
(r.degree. C.) and composed only of completely hollow particles. The particle diameter of the ceramic fine hollow particles is in the range of 5 to 350 μm, and fine 5 to 75 μm, medium 75 to 150 μm.
m, coarseness 150-350 μm, fine adjustment of fineness 20
Parts by weight, 20 parts by weight of medium mesh and 30 parts by weight of coarse mesh are used. 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 /
Although cm ^3, and those that were particle size control is 0.36g / cm
It is around ³ . The addition amount of the ceramic fine hollow particles is 300 to 100 parts by weight of the resole type phenol resin.
900 parts by weight. If the amount is 300 parts by weight or less, a texture exhibiting a high gloss and luminance surface is not exhibited, and the heat insulating performance is not improved. If the amount is 900 parts by weight or more, the strength is reduced.

The glass powder used in the present invention is most 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, for example, any one or more of feldspar, feldspar, magnesium carbonate, lime phosphate, lead oxide, boric acid, sodium carbonate, sodium nitrate, zinc oxide and the like may be added. Good. Particle size of glass powder and flux is 5 ~
The range of 100 μm is preferable, and it is effective as a binder for improving the fire resistance when the insulated roofing material is heated.
The amount of glass powder added was 100 resole phenolic resin.
It is 100 to 250 parts by weight based on parts by weight. If the amount is less than 100 parts by weight, the effect as a binder having fire resistance cannot be exhibited, and if it is more than 250 parts by weight, the strength is reduced.

The crushed ceramic waste particles used in the present invention are obtained by crushing defective products generated in the porcelain production process. Pottery here means pottery, pottery, soap, porcelain, and concrete products include black clay tiles, bricks, earthen pipes, pottery tiles, interior and exterior tiles, sanitary ware, etc.
Stoneware is cold-resistant clay tiles, terracotta, pavement bricks, interior and exterior tiles, floor tiles, pottery tubes, etc., porcelain is interior and exterior tiles,
There are floor tiles, mosaic tiles, sanitary ware, etc. These products are used by crushing defective products and waste.

The crushed ceramic waste particles are fine, medium, and coarse, and the fine particle diameter is 0.1 to 0.5 mm for fine, 0.5 to 1.5 mm for medium, and 1.5 to 3 for coarse. Adjust to 4 mm before use. In addition to the crushed ceramic waste particles, silica powder, fly ash, silica fume, clay, talc, kaolin, annealed blast furnace slag slag, and siliceous dust may be added as necessary.

The color of the crushed ceramic waste particles differs depending on the original porcelain product, and a unique texture such as stone-grained or brick-like can be exhibited by blending them in various ways. By adding an appropriate amount of white mesh particles of sanitary garbage waste particles to the coarse and fine particles of the ground brick waste particles, a completely new tile-like pattern, which did not exist before, can be expressed.

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 insulated roofing material.

[0024]

Embodiments of the present invention will be described below in detail.

EXAMPLE A galvalume steel sheet having a thickness of 0.4 mm was press-molded to a total length of 1300 mm and a working length of 12 mm.
A metal molded roof tile having a size of 30 mm and a width of 320 mm was manufactured. On the surface of the metal molded roof which is to be the outdoor surface, 100 parts by weight of resol type phenol resin is applied with a compressive strength of 700 kgf / cm ² ,
Ceramic fine hollow particles having a bulk specific gravity of 0.3 to 0.5 g / cm ³ , a melting point of 1600 ° C., a thermal conductivity of 0.1 (kcal / mhr ° C.), and composed of only completely hollow particles, and having a particle size adjusted to 650 weight Parts, fine particles of brick waste as ground particles of ceramic waste, 10 parts by weight of fine particles, 70 parts by weight of coarse powder, 20 parts by weight of fine white ground sanitary waste particles mixed with 350 parts by weight, glass powder 200 parts A proper amount of a dispersant, a stabilizer and the like were added to parts by weight, a little amount of water, and other admixtures to prepare a heat insulating coating material, which was kneaded well 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.

[0026]

The heat-insulating roofing material thus manufactured is:
The ceramic fine hollow particles having a high heat insulating performance were able to exhibit excellent heat insulating and soundproofing effects equal to or better than those of a conventional metal roofing material in which a sheathing board was stretched on the back of a steel plate. The surface of the heat-insulating roof material has a beautiful stone-like or brick-like appearance, and the light can be softly diffused and reflected by the ceramic fine hollow particles to provide a calm and insulated roof material, and the surface is coated with fluororesin. Thereby, excellent weather resistance, heat resistance, and cold resistance were able to be improved.

[0027] By using rejected phenolic resin as a binder by using rejected crushed particles generated during the production process of ceramics, it is possible to effectively use ceramic waste disposed of as industrial waste. I was squeezed.

[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

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E108 AZ01 AZ02 BB01 BN02 CC01 CV07 CV10 DD05 GG01 GG04 GG19 4F100 AB01A AB03 AC10C AD00C AG00C AK17D AK34B BA04 BA07 BA10A BA10D DE01C EH46 EJ17 GB07 JA04C JA20

Claims (1)

[Claims] 1. A metal-molded roof tile obtained by press-molding a thin metal plate, a resol-type phenol resin is applied on the surface of the metal-molded roof tile with a compression strength of 600 kgf / cm ² or more and a bulk specific gravity of 0.3.
To 0.5 g / cm ^3, and characterized by applying a fluororesin coating and drying after the surface of the melting point of 1500 ° C. or more ceramic fine hollow particles and ceramic waste ground particles and the heat insulating coating material obtained by kneading glass powder as a surface layer Insulation roofing material.