WO2016027456A1 - Coating material for forming electrolytic corrosion prevention layer, and heat shielding material - Google Patents

Coating material for forming electrolytic corrosion prevention layer, and heat shielding material Download PDF

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Publication number
WO2016027456A1
WO2016027456A1 PCT/JP2015/004106 JP2015004106W WO2016027456A1 WO 2016027456 A1 WO2016027456 A1 WO 2016027456A1 JP 2015004106 W JP2015004106 W JP 2015004106W WO 2016027456 A1 WO2016027456 A1 WO 2016027456A1
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Prior art keywords
heat
layer
electrolytic corrosion
film
heat shielding
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PCT/JP2015/004106
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French (fr)
Japanese (ja)
Inventor
野口　修平
彩乃 野口
栄治 菊元
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日本遮熱株式会社
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Publication of WO2016027456A1 publication Critical patent/WO2016027456A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
    • C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D123/10—Homopolymers or copolymers of propene
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • C09D167/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D201/00—Coating compositions based on unspecified macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/64—Insulation or other protection; Elements or use of specified material therefor for making damp-proof; Protection against corrosion
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E04B1/78—Heat insulating elements

Definitions

  • the present invention is a coating material for forming an electrolytic corrosion prevention layer for forming an electrolytic corrosion prevention layer that prevents an electrolytic corrosion phenomenon that one metal corrodes when the state in which the metals are in contact with each other is maintained. And this is related with the heat-shielding material currently formed in the surface.
  • a thin film such as aluminum alloy (for example, aluminum foil), which is a material having high reflectivity against radiant heat, is used as a metal outer wall material constituting factories and stores, Increasing cases have been placed on roofing or shutter materials.
  • aluminum alloy for example, aluminum foil
  • an aluminum foil is directly attached to a roof or an outer wall with an adhesive or a double-sided tape, or an aluminum foil is directly fixed to a lightweight iron material on a ceiling with screws or the like.
  • This aluminum foil is generally made by rolling high-purity aluminum and has a thickness of about 5 to 350 microns.
  • Patent Document 1 the inventors have conventionally used heat shielding materials applicable to new and existing buildings as metal outer wall materials, metal roof materials, metal shutter material plate materials, and the like. Board material has been provided.
  • an anti-corrosion agent is disposed between a base material such as a metal plate and an aluminum layer, which is a material having a high reflectivity with respect to radiant heat, to take measures to prevent electrolytic corrosion.
  • an air layer is formed on one of the front and back surfaces of a base material used as any one of an outer wall material, a roof material, and a shutter material of a building that is directly irradiated with sunlight.
  • a heat shield layer which is a layer made of a material having a high reflectivity with respect to radiant heat
  • the surface provided with the heat shield layer is exposed to the indoor side opposite to the surface directly irradiated with sunlight.
  • a heat shield plate that is characterized by In Patent Document 1, a layer made of a material having a high reflectivity with respect to radiant heat is an aluminum layer, and a chemical fiber sheet, a resin sheet, a resin film, or a resin film is interposed between the metal substrate and the aluminum layer. The thing which intervened the anti-corrosion layer is also proposed.
  • the electrolytic corrosion phenomenon can be prevented.
  • the case where the heat shielding effect by the aluminum layer is reduced occurs. In such a case, if the heat shielding effect is sufficiently maintained, the effect of preventing the electrolytic corrosion phenomenon may not be obtained. That is, there is a demand for means that can reliably achieve both the electrolytic corrosion prevention effect and the heat shielding effect.
  • the present invention has been proposed in view of the above circumstances, and has a coating material for forming an anti-corrosion layer capable of achieving both an anti-corrosion effect and a heat-shielding effect of a material having a high reflectivity against radiant heat, and a heat-shielding
  • the purpose is to provide materials.
  • the coating material for forming an electrolytic corrosion prevention layer according to the present invention is such that the film formed on the surface of the material having a high reflectivity with respect to radiant heat has a hardness higher than that of polypropylene in Rockwell hardness.
  • the present invention is characterized by comprising a heat shielding layer comprising the above material and a film of the coating material for forming the electric corrosion prevention layer formed on the surface of the material so as to have a thickness of 10 microns or less.
  • the material is an aluminum alloy.
  • high reflectance means a reflectance of 90% or more.
  • a layer formed of a material having a high reflectance with respect to radiant heat is simply referred to as a “high reflectance layer” in the following description.
  • aluminum layer refers to a thin film (film-like) aluminum alloy foil (also referred to as aluminum foil) having a thickness of 0.005 to 0.035 mm or aluminum vapor deposition. It refers to the layer.
  • the film formed on the surface of the material having high reflectivity with respect to radiant heat has a Rockwell hardness of not less than polypropylene and not more than polyethylene terephthalate. It is the structure which is insulating resin which has the hardness of. If a film having a hardness lower than polypropylene (PP), that is, a film softer than PP, is formed, the surface is easily scratched, and there is a possibility that the electrolytic corrosion prevention effect may be reduced. If a film harder than polyethylene terephthalate (PET), that is, a film harder than PET, is formed, it may be too hard to handle such as rolling or rolling the material. Therefore, the coating material for forming an electrolytic corrosion prevention layer according to the present invention can form a film having an appropriate hardness on a material having a high reflectance with respect to radiant heat.
  • PP polypropylene
  • PET polyethylene terephthalate
  • the coating material for forming an electrolytic corrosion prevention layer according to the present invention has a thickness of 10 microns or less and forms a film on the surface of a material having a high reflectance with respect to radiant heat. Can be made compatible.
  • the coating material for forming an electrolytic corrosion preventing layer according to the present invention can obtain effects such as acid resistance and alkali resistance in addition to the electrolytic corrosion preventing effect after forming a film on the surface of the material.
  • the heat shielding material according to the present invention comprises the above material and a film of the coating material for forming an electrolytic corrosion prevention layer according to the present invention formed on the surface of the material so as to have a thickness of 10 microns or less.
  • a thermal layer is provided. Therefore, it is possible to provide a heat shielding material including a heat shielding layer that achieves both an electrolytic corrosion preventing effect and a heat shielding effect.
  • the material is an aluminum alloy
  • the reflectivity for the radiant heat is as high as 97 to 98%, and the emissivity is as low as 3 to 2%.
  • a heat shielding effect can be obtained.
  • the work can be easily performed by bonding with various metal substrates to which the heat shielding material according to the present invention is applied. is there. Material costs can also be reduced.
  • the thickness of the heat shield according to the present invention is thin, lightweight, and does not become bulky, the management cost and the conveyance cost can be greatly reduced.
  • the heat shielding material according to the present invention is not limited to the case where it is applied to a new outer wall material, roof material, or shutter material.
  • the outer wall material, roof material, or shutter material that has already been constructed or installed is used.
  • it can be attached to roof tiles (Japanese tiles, Western tiles, etc.), concrete blocks, steel materials, etc.
  • roof tiles Japanese tiles, Western tiles, etc.
  • the outer wall material, roof material, and shutter material from which the heat-shielding effect is acquired can be provided, providing the electric corrosion prevention effect.
  • the outer wall material, the roof material, and the shutter material provided with the heat shielding material according to the present invention can be applied with the same molding method as the conventional one, and the field installation work is also performed in the same manner as the conventional work. be able to. Therefore, the construction cost can be reduced compared to the case where heat insulation work and heat insulation work are separately performed.
  • the idea of the present invention is not to insulate heat transfer from the outermost base material with a heat insulating material or the like, but to use a low-radiation material as a heat shield layer to suppress an increase in indoor temperature. Since the sum of the reflectivity and emissivity of the metal is ⁇ (1), attention was paid to the fact that the heat shielding layer including a layer made of a material having a high reflectivity with respect to radiant heat has low emissivity.
  • an aluminum layer made of aluminum alloy foil (aluminum foil) or aluminum vapor deposition has a reflectivity of 97 to 98% with respect to radiant heat and an emissivity of only 2 to 3%.
  • the material having a high reflectivity with respect to the radiant heat is not limited to the aluminum alloy, and can be achieved by a noble metal such as gold or silver.
  • the largest factor that raises the temperature of the material is radiant heat. It is possible to reduce changes in environmental temperature of humans and animals such as chickens and cows. In addition, the temperature change of various substances stored in the room can be reduced. Furthermore, the heat flow that moves through the building reverses between the warm season such as summer and the cold season such as winter. On the other hand, the performance with high reflectivity can be effectively used in the cold season.
  • the present invention when the heat shield layer is composed only of a high reflectivity layer made of an aluminum alloy, attention has been paid to the possibility that electric corrosion may occur due to contact with the surface metal substrate (foreign metal). Then, as shown in FIG. 1, the present invention is formed by forming an electrolytic corrosion prevention film 2 on the surface of the aluminum layer 1 so as to have a thickness of 10 microns or less, for example, by coating the electrolytic corrosion prevention film 2.
  • the present invention relates to a heat shielding material provided with a heat shielding layer.
  • the aluminum layer 1 is made of, for example, an aluminum alloy foil (aluminum foil). It has a reflectivity of 97 to 98% with respect to radiant heat, and the emissivity is only 2 to 3%.
  • the electrolytic corrosion prevention film 2 is an insulating resin, and has a Rockwell hardness equal to or higher than that of polypropylene (hereinafter referred to as “PP”) and is equal to or lower than that of polyethylene terephthalate (hereinafter referred to as “PET”). Of hardness.
  • PP polypropylene
  • PET polyethylene terephthalate
  • This electrolytic corrosion prevention film 2 is also effective in acid resistance and alkali resistance.
  • the insulating resin having such a configuration for example, polyvinyl chloride (PVC) can be exemplified.
  • PVC polyvinyl chloride
  • Rockwell hardness it has a hardness of PP or higher and has a hardness of PET or lower, can be coated on the surface of a material having high reflectivity with respect to radiant heat, and has a thickness of 10 microns or less.
  • the present invention It can employ
  • PP or PET may be employed as the insulating resin.
  • the insulating resin to be coated is a film softer than PP, it is not preferable because the surface is easily scratched and the effect of preventing electrolytic corrosion may be reduced. If the film is harder than PET, it is not preferable because it is too hard to handle the heat-shielding material because it is difficult to handle such as rolling or rolling the material.
  • the thinner the film that coats the insulating resin the lower the reflectivity of the material with high reflectivity against radiant heat can be suppressed. This is not preferable because the prevention effect may be reduced.
  • the thickness of the film coated with the insulating resin is thicker, the effect of preventing electrolytic corrosion is surely obtained. However, if the thickness exceeds 10 microns, the reflectance may decrease by more than 10%. Absent. Therefore, the thickness of the film coated with the insulating resin is preferably about 3 to 7 microns. In particular, from the viewpoint of ease of formation, the thickness of the film that coats the insulating resin is preferably 5 microns.
  • the decrease in the reflectivity of the material caused by the formed film is considered if the heat shielding effect is considered. It is necessary to be within 10%.
  • the heat shielding effect is particularly taken into consideration, it is preferable that the decrease in the reflectance of the material after forming a film with an insulating resin is within 5%.
  • the electrolytic corrosion prevention film 2 As the best mode believed by the applicant, for example, when polyvinyl chloride (PVC) as the electrolytic corrosion prevention film 2 is formed on the surface of the aluminum layer 1 with a thickness of 5 microns, The decrease in reflectance can be kept within 1%. Specifically, as will be described in the following examples, since the reflectance of 97% is only reduced to 96%, the heat shielding effect can be reliably maintained. In addition, in the best mode believed by the applicant, in addition to the electrolytic corrosion preventing effect, effects such as acid resistance and alkali resistance can be obtained.
  • PVC polyvinyl chloride
  • the electrolytic corrosion prevention film 2 is configured by being applied to the surface of the aluminum layer 1 to form a film. Therefore, the insulating resin that is the material of the electrolytic corrosion prevention film 2 is applied to the surface of the aluminum layer 1 in the state of a solution dissolved in an appropriate organic solvent. From the viewpoint of coating, the concentration of the insulating resin in the solution is suitably 15 to 25% by weight, for example.
  • the film formed by the coating film on the material having high reflectivity with respect to radiant heat is an insulating resin having a hardness of PP or higher and a hardness of PET or lower in Rockwell hardness, By forming a film having a thickness of 10 microns or less, the reduction in reflectance with respect to radiant heat in a material having high reflectance with respect to radiant heat is within 10%.
  • the coating material for forming an electrolytic corrosion prevention layer according to the present invention is a coating agent provided in the form of a solution in which an insulating resin as a material of the electrolytic corrosion prevention film 2 in the above embodiment is dissolved in an appropriate organic solvent. Although it is provided in a form, for example, it can be configured by attaching a sheet having a thickness of 10 microns or less.
  • the thermal insulation material according to the present invention is coated on both surfaces of the aluminum layer 1. Even if the film is added assuming the film formation, the heat shielding layer can be made to have a total thickness of 55 microns or less. Therefore, the thickness of the heat shielding material according to the present invention is thin, lightweight, and does not become bulky, so that the management cost and the conveyance cost can be greatly reduced.
  • Example 1 As Example 1, a decorative steel sheet having a thickness of 0.5 mm as a metal substrate, an aluminum layer 1 made of an aluminum alloy foil having a thickness of 15 ⁇ m, and the aluminum alloy film are coated so that the film thickness becomes 5.0 ⁇ m (microns).
  • a corrosion test (visual observation and reflectivity retention measurement) was performed on the heat insulating material constituted by the heat insulating layer composed of the electrolytic corrosion preventing layer 2 formed as a film. Specifically, an exposure test using a laboratory light source for a polymer building material was performed according to the method defined in JIS A1415.
  • the electric corrosion prevention layer 2 is bonded (or welded) and integrated so as to be in direct contact with the metal substrate.
  • a material was prepared.
  • the metal substrate having the same material and thickness as in the example and the aluminum layer 1 made of the aluminum alloy foil are bonded (or welded). Integrated.
  • the decrease in the reflectance with respect to the radiant heat is within 1%, while in the heat shielding material according to the comparative example, a reduction of at least 30% is recognized. It was. In particular, it can be seen that the average value of the five samples of the comparative example shows a drop in reflectance close to 50%.
  • Example 2 As Example 2, an outdoor test (visual observation) was conducted in which the heat shielding material constructed in the same manner as in Example 1 and the heat shielding material of the comparative example were installed outdoors for one year to be in a vague state and observed for deterioration. Carried out. The passage of one year in a vague state outdoors corresponds to the use indoors for 20 years. The result is shown in FIG.
  • the center of FIG. 3 shows an enlarged appearance of the heat shielding material of the example, and the both ends of FIG. 3 show the enlarged appearance of the heat shielding material of the comparative example.
  • Example 3 As Example 3, for the heat shielding material configured in the same manner as in Example 1 and the heat shielding material of the comparative example, a test room as shown in FIG. 4 is used, and JIS A 4710 (a test method for heat insulation of joinery). The heat shielding effect test was carried out according to the method specified in 1.
  • the test room has a partition wall C at the boundary between a temperature-controlled room A adjusted to around 20 ° C. and a low temperature room B adjusted to around 0 ° C. Yes.
  • the partition wall C has an opening having a certain area.
  • the heat flow resistance (m 2 ⁇ K / W) of the heat shield material X of the example or the heat shield material Y of the comparative example was measured.
  • a heating box F is installed on the side of the constant temperature room A of the partition wall C so as to cover the siding D.
  • the size of the opening is 2230 ⁇ 2325 mm.
  • the heat shield material according to the example is about 10% lower than the heat shield material according to the comparative example. That is, it was confirmed that the heat shielding material according to the example did not significantly decrease even when the electrolytic corrosion preventing layer 2 was provided, and the heat shielding performance was maintained.
  • the heat shielding material according to the present invention is formed by coating a material having a high reflectance with respect to radiant heat (for example, the aluminum layer 1) and a thickness of 10 ⁇ m or less on the surface of the material.
  • a material having a high reflectance with respect to radiant heat for example, the aluminum layer 1
  • a thickness of 10 ⁇ m or less on the surface of the material.
  • it is configured to include a heat shielding layer composed of an electrolytic corrosion prevention layer 2 made of PVC. Accordingly, it is possible to provide a heat shield material including a heat shield layer that achieves both an electrolytic corrosion preventing effect and a heat shield effect.
  • corrosion resistance does not occur even after 6 months and a good anti-corrosion effect is recognized, and the reflectivity to 97% of radiant heat is 96% even after exposure.
  • the electrolytic corrosion prevention layer is composed of a metal (aluminum layer or the like) as a high reflectance layer and a metal (metal substrate) to which a heat shielding material composed of the electrolytic corrosion prevention layer and the aluminum layer is applied.
  • an electrolytic corrosion prevention layer can be provided for the purpose of preventing contact between the metal substrate and an external metal or a high reflectance layer and an external metal.
  • the use of the heat shield material according to the present invention includes metal roofs, outer walls, shutters, doors, ALC roofs, walls, RC roofs, walls (outer wall tiles, artificial marble), etc., steel buildings, agricultural use, high-rise buildings Suitable for building PC construction and general buildings.

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Abstract

A heat shielding material is provided with a heat shielding layer that achieves an electrolytic corrosion prevention effect and a heat shielding effect. An electrolytic corrosion prevention layer 2 that comprises polyvinyl chloride (PVC) and that has a thickness of 10 microns or less is formed by applying a film to an aluminum layer 1 that comprises an aluminum alloy foil as a raw material having high reflectance with respect to radiant heat. It is thereby possible to achieve a decrease in the reflectance of the aluminum layer 1 with respect to radiant heat that is within 10%, and more specifically within 1%. The heat shielding material thus obtained has the ability to resist corrosion when left indoors for a period of twenty years and has a good electrolytic corrosion prevention effect.

Description

電食防止層形成用コーティング材、及び遮熱材Coating material for forming an electrolytic corrosion prevention layer, and heat shielding material
　本発明は、金属同士が接触している状態が維持されると、その一方の金属が腐食してしまう電食現象を防止する電食防止層を形成するための電食防止層形成用コーティング材及び、これが表面に形成されている遮熱材に関する。 The present invention is a coating material for forming an electrolytic corrosion prevention layer for forming an electrolytic corrosion prevention layer that prevents an electrolytic corrosion phenomenon that one metal corrodes when the state in which the metals are in contact with each other is maintained. And this is related with the heat-shielding material currently formed in the surface.
　省エネルギー対策や熱中症対策のために、輻射熱に対して高反射率となる素材であるアルミニウム合金等の薄膜（例えば、アルミホイル）を、工場や店舗等を構成している金属製の外壁材、屋根材又はシャッター材に配設されるケースが増えている。例えば、屋根や外壁にアルミホイルを、接着剤や両面テープで直接貼りつけ、又は天井の軽量鉄材にアルミホイルを直接ビス等で固定する等して配設されている。このアルミホイルは、高純度のアルミが圧延されて作られ、５～３５０ミクロン程度の厚みのものが一般的である。 For energy saving measures and heat stroke measures, a thin film such as aluminum alloy (for example, aluminum foil), which is a material having high reflectivity against radiant heat, is used as a metal outer wall material constituting factories and stores, Increasing cases have been placed on roofing or shutter materials. For example, an aluminum foil is directly attached to a roof or an outer wall with an adhesive or a double-sided tape, or an aluminum foil is directly fixed to a lightweight iron material on a ceiling with screws or the like. This aluminum foil is generally made by rolling high-purity aluminum and has a thickness of about 5 to 350 microns.
　ただし、このアルミホイルと金属製の外壁材、屋根材又はシャッター材とが金属同士である場合に、これらを接触させておくと、電気が流れることにより、その一方が腐食する電食現象と呼ばれる現象が起こる。したがって、何らかの対策を施さないとアルミホイルが消失し、輻射熱に対する反射性能を失って省エネルギー対策や熱中症対策が行えなくなる。 However, when this aluminum foil and metal outer wall material, roofing material, or shutter material are made of metal, if they are kept in contact with each other, electricity will flow and one of them will be corroded. A phenomenon occurs. Therefore, if some measures are not taken, the aluminum foil disappears, the reflection performance against radiant heat is lost, and energy saving measures and heat stroke measures cannot be performed.
　発明者らは、例えば、下記特許文献１等で提案するように、従来から金属製外壁材、金属製屋根材、金属シャッター材の板材等として、新築及び既築の建物に適用可能な遮熱板材を提供してきた。特に、金属板等の基材と、輻射熱に対して高反射率の素材であるアルミニウム層との間に電食防止剤を配設し、電食を防止する対策を施している。 For example, as proposed in the following Patent Document 1 and the like, the inventors have conventionally used heat shielding materials applicable to new and existing buildings as metal outer wall materials, metal roof materials, metal shutter material plate materials, and the like. Board material has been provided. In particular, an anti-corrosion agent is disposed between a base material such as a metal plate and an aluminum layer, which is a material having a high reflectivity with respect to radiant heat, to take measures to prevent electrolytic corrosion.
　具体的には、特許文献１において、太陽光が直接照射される建築物の外壁材、屋根材、シャッター材の何れか一つとして用いられる基材の表裏のうちの一方の面に、空気層を介在させることなく、輻射熱に対して高反射率の素材による層である遮熱層を設け、該遮熱層を設けた面を太陽光が直接照射される面とは反対の室内側に露出していることを特徴とする遮熱板材を提案した。特許文献１では、輻射熱に対して高反射率の素材による層をアルミニウム層とし、金属基板とアルミニウム層との間に、化学繊維シート、樹脂製シート、樹脂皮膜、樹脂塗膜の何れかによる電食防止層を介在させたものも提案している。 Specifically, in Patent Document 1, an air layer is formed on one of the front and back surfaces of a base material used as any one of an outer wall material, a roof material, and a shutter material of a building that is directly irradiated with sunlight. Without providing a heat shield layer, which is a layer made of a material having a high reflectivity with respect to radiant heat, the surface provided with the heat shield layer is exposed to the indoor side opposite to the surface directly irradiated with sunlight. We proposed a heat shield plate that is characterized by In Patent Document 1, a layer made of a material having a high reflectivity with respect to radiant heat is an aluminum layer, and a chemical fiber sheet, a resin sheet, a resin film, or a resin film is interposed between the metal substrate and the aluminum layer. The thing which intervened the anti-corrosion layer is also proposed.
特許第５３２２０７０号公報Japanese Patent No. 5322070
　しかしながら、電食防止剤を構成する成分や、これを膜にしたときの硬さ、金属基板とアルミニウム層との間に配設する厚み等を注意深く検討すれば、電食現象を防止することができる一方で、アルミニウム層による遮熱効果が薄れるケースが生じてしまう。このようなケースにおいて、遮熱効果を十分に維持しようとすれば、電食現象を防止する効果が得られなくなる虞がある。すなわち、電食防止効果と遮熱効果とを確実に両立させることができる手段が求められている。 However, by carefully examining the components that constitute the electrolytic corrosion inhibitor, the hardness when it is formed into a film, the thickness disposed between the metal substrate and the aluminum layer, etc., the electrolytic corrosion phenomenon can be prevented. On the other hand, the case where the heat shielding effect by the aluminum layer is reduced occurs. In such a case, if the heat shielding effect is sufficiently maintained, the effect of preventing the electrolytic corrosion phenomenon may not be obtained. That is, there is a demand for means that can reliably achieve both the electrolytic corrosion prevention effect and the heat shielding effect.
　本発明は、上記実情に鑑み提案され、電食防止効果とともに、輻射熱に対して高反射率の素材が備える遮熱効果とを両立させることのできる電食防止層形成用コーティング材、及び遮熱材を提供することを目的とする。 The present invention has been proposed in view of the above circumstances, and has a coating material for forming an anti-corrosion layer capable of achieving both an anti-corrosion effect and a heat-shielding effect of a material having a high reflectivity against radiant heat, and a heat-shielding The purpose is to provide materials.
　上記目的を達成するため、本発明に係る電食防止層形成用コーティング材は、輻射熱に対して高反射率の素材の表面に形成される膜が、ロックウエル硬さにおいて、ポリプロピレン以上の硬さであって、ポリエチレンテレフタラート以下の硬さを有する絶縁性の樹脂であり、厚みを１０ミクロン以下とした前記膜の形成によって、前記素材の輻射熱に対する反射率の低下が１０％以内に収まることを特徴とする。 In order to achieve the above object, the coating material for forming an electrolytic corrosion prevention layer according to the present invention is such that the film formed on the surface of the material having a high reflectivity with respect to radiant heat has a hardness higher than that of polypropylene in Rockwell hardness. In addition, an insulating resin having a hardness of polyethylene terephthalate or less, and by forming the film having a thickness of 10 microns or less, a decrease in reflectance with respect to radiant heat of the material is within 10%. And
　また、本発明は、上記素材と、該素材の表面に厚みが１０ミクロン以下となるように形成される上記電食防止層形成用コーティング材の膜とからなる遮熱層を備えることを特徴とする遮熱材に係る。特に、前記素材は、アルミニウム合金であることを特徴とする。 Further, the present invention is characterized by comprising a heat shielding layer comprising the above material and a film of the coating material for forming the electric corrosion prevention layer formed on the surface of the material so as to have a thickness of 10 microns or less. Related to the heat shield. In particular, the material is an aluminum alloy.
　ここで、「高反射率」とは、９０％以上の反射率をいう。また、「輻射熱に対して高反射率の素材により形成される層」を、以下の説明において「高反射率層」と簡略して称する。このほか、以下の説明において、「アルミニウム層」とは、０．００５～０．０３５ｍｍの厚さの薄膜（フィルム状）のアルミニウム合金はく（又は、アルミホイルとも称される。）やアルミ蒸着層のことをいう。 Here, “high reflectance” means a reflectance of 90% or more. Further, “a layer formed of a material having a high reflectance with respect to radiant heat” is simply referred to as a “high reflectance layer” in the following description. In addition, in the following description, “aluminum layer” refers to a thin film (film-like) aluminum alloy foil (also referred to as aluminum foil) having a thickness of 0.005 to 0.035 mm or aluminum vapor deposition. It refers to the layer.
　本発明に係る電食防止層形成用コーティング材は、輻射熱に対して高反射率の素材の表面に形成される膜が、ロックウエル硬さにおいて、ポリプロピレン以上の硬さであって、ポリエチレンテレフタラート以下の硬さを有する絶縁性の樹脂である構成である。ポリプロピレン（ＰＰ）未満の硬さ、すなわちＰＰよりも柔らかい膜を形成すれば、表面に傷が付きやすくなって電食防止効果が薄れる虞が生じる。ポリエチレンテレフタラート（ＰＥＴ）より硬い硬さ、すなわちＰＥＴよりも硬い膜を形成すれば、硬すぎて素材を丸める、ロールする等の取扱いが難しくなる虞がある。したがって、本発明に係る電食防止層形成用コーティング材は、輻射熱に対して高反射率の素材へ適切な硬さの膜を形成することができる。 In the coating material for forming an electrolytic corrosion prevention layer according to the present invention, the film formed on the surface of the material having high reflectivity with respect to radiant heat has a Rockwell hardness of not less than polypropylene and not more than polyethylene terephthalate. It is the structure which is insulating resin which has the hardness of. If a film having a hardness lower than polypropylene (PP), that is, a film softer than PP, is formed, the surface is easily scratched, and there is a possibility that the electrolytic corrosion prevention effect may be reduced. If a film harder than polyethylene terephthalate (PET), that is, a film harder than PET, is formed, it may be too hard to handle such as rolling or rolling the material. Therefore, the coating material for forming an electrolytic corrosion prevention layer according to the present invention can form a film having an appropriate hardness on a material having a high reflectance with respect to radiant heat.
　さらに、厚みを１０ミクロン以下とした膜の形成によって、輻射熱に対して高反射率の素材の反射率の低下が１０％以内に収まる構成である。したがって、輻射熱に対して高反射率の素材が備える遮熱効果を、ほとんど阻害することなく維持することができる。すなわち、本発明に係る電食防止層形成用コーティング材を、厚みを１０ミクロン以下として輻射熱に対して高反射率の素材の表面に膜を形成することにより、電食防止効果と遮熱効果とを両立させることができる。なお、本発明に係る電食防止層形成用コーティング材は、素材の表面に膜を形成した後に電食防止効果のほか、耐酸、耐アルカリ等の効果を得ることができる。 Furthermore, by forming a film having a thickness of 10 microns or less, the reflectance of a material having a high reflectance with respect to radiant heat is kept within 10%. Therefore, it is possible to maintain the heat shielding effect of the material having a high reflectivity with respect to the radiant heat with almost no hindrance. That is, the coating material for forming an electrolytic corrosion prevention layer according to the present invention has a thickness of 10 microns or less and forms a film on the surface of a material having a high reflectance with respect to radiant heat. Can be made compatible. In addition, the coating material for forming an electrolytic corrosion preventing layer according to the present invention can obtain effects such as acid resistance and alkali resistance in addition to the electrolytic corrosion preventing effect after forming a film on the surface of the material.
　また、本発明に係る遮熱材は、上記素材と、該素材の表面に厚みが１０ミクロン以下となるように形成される本発明に係る電食防止層形成用コーティング材の膜とからなる遮熱層を備える。したがって、電食防止効果と遮熱効果とを両立させた遮熱層を備える遮熱材を提供することができる。特に、素材がアルミニウム合金である構成のとき、例えば、アルミニウム合金はくであるとき、その輻射熱に対する反射率は９７～９８％と高く、放射率は３～２％と低いため、十分で確実な遮熱効果を得ることができる。しかも、工業製品として信頼性の高いアルミニウム合金はく（アルミホイル）やアルミ蒸着を用いるので、本発明に係る遮熱材を適用する各種の金属基板との貼合わせ等で、その作業が容易である。材料コストを抑えることもできる。また、本発明に係る遮熱材の厚みは薄く、軽量であり、嵩張ることもないため、管理コスト及び搬送コストを大幅に削減可能である。 Further, the heat shielding material according to the present invention comprises the above material and a film of the coating material for forming an electrolytic corrosion prevention layer according to the present invention formed on the surface of the material so as to have a thickness of 10 microns or less. A thermal layer is provided. Therefore, it is possible to provide a heat shielding material including a heat shielding layer that achieves both an electrolytic corrosion preventing effect and a heat shielding effect. In particular, when the material is an aluminum alloy, for example, when the aluminum alloy is a foil, the reflectivity for the radiant heat is as high as 97 to 98%, and the emissivity is as low as 3 to 2%. A heat shielding effect can be obtained. Moreover, since highly reliable aluminum alloy foil (aluminum foil) or aluminum vapor deposition is used as an industrial product, the work can be easily performed by bonding with various metal substrates to which the heat shielding material according to the present invention is applied. is there. Material costs can also be reduced. Moreover, since the thickness of the heat shield according to the present invention is thin, lightweight, and does not become bulky, the management cost and the conveyance cost can be greatly reduced.
　さらに、本発明に係る遮熱材は、新たな外壁材や屋根材、シャッター材に適用される場合に限定されず、例えば、既に建築され、又は設置された外壁材、屋根材、シャッター材のほか、屋根瓦（和瓦や洋瓦など）やコンクリートブロック、鋼材等へ添設することができる。これにより、本発明に基づいて、電食防止効果を備えつつ遮熱効果が得られる外壁材や屋根材、シャッター材を提供することができる。本発明に係る遮熱材を備えた外壁材、屋根材、シャッター材は、従来と全く同様な成形加工法を適用することができ、その現場取り付け工事もまた、従来の作業と全く同様に行うことができる。そのため、別途、断熱工事や遮熱工事を行う場合に比べて、施工価格を安く抑えることができる。 Furthermore, the heat shielding material according to the present invention is not limited to the case where it is applied to a new outer wall material, roof material, or shutter material. For example, the outer wall material, roof material, or shutter material that has already been constructed or installed is used. In addition, it can be attached to roof tiles (Japanese tiles, Western tiles, etc.), concrete blocks, steel materials, etc. Thereby, based on this invention, the outer wall material, roof material, and shutter material from which the heat-shielding effect is acquired can be provided, providing the electric corrosion prevention effect. The outer wall material, the roof material, and the shutter material provided with the heat shielding material according to the present invention can be applied with the same molding method as the conventional one, and the field installation work is also performed in the same manner as the conventional work. be able to. Therefore, the construction cost can be reduced compared to the case where heat insulation work and heat insulation work are separately performed.
本発明に係る遮熱材における遮熱層の一実施形態を模式的に示す断面図である。It is sectional drawing which shows typically one Embodiment of the heat insulation layer in the heat insulation material which concerns on this invention. 本発明に係る遮熱材の実施例及び比較例に対して行った腐食試験後の外観を写真撮影して、これを説明する説明図である。It is explanatory drawing which photographed the external appearance after the corrosion test performed with respect to the Example and comparative example of the heat shield which concern on this invention, and illustrates this. 本発明に係る遮熱材の実施例及び比較例に対して行った屋外試験後の外観の要部を拡大して写真撮影して、これを説明する説明図である。It is explanatory drawing which expands the principal part of the external appearance after the outdoor test performed with respect to the Example and comparative example of the heat shield which concern on this invention, and photographed it, and demonstrates this. 本発明に係る遮熱材の実施例及び比較例に対して行った遮熱効果試験の試験概要を説明する説明図である。It is explanatory drawing explaining the test outline | summary of the heat-shielding effect test done with respect to the Example and comparative example of the heat-shielding material which concern on this invention.
　以下、本発明に係る遮熱材の一実施形態を、図面を参照しつつ説明する。なお、下記実施形態は本発明を具現化した例示に過ぎない。そして、本発明は特許請求の範囲に記載された事項を逸脱することがなければ、種々の設計変更が可能である。 Hereinafter, an embodiment of a heat shielding material according to the present invention will be described with reference to the drawings. Note that the following embodiments are merely examples embodying the present invention. The present invention can be modified in various ways without departing from the scope of the claims.
　米国の多くの機関の報告によると、建物を移動する熱の平均７５％は輻射熱であるといわれている。しかも、屋根からの熱の出入りの７０～９３％が輻射熱であるとされ、壁方向の輻射熱の量は壁全体の６５～８０％とされている。従って、このような輻射熱をカットすることが最も効率的な省エネルギー工法といえる。 According to the reports of many organizations in the United States, it is said that an average of 75% of heat moving through buildings is radiant heat. Moreover, 70 to 93% of the heat entering and exiting the roof is radiant heat, and the amount of radiant heat in the wall direction is 65 to 80% of the entire wall. Therefore, it can be said that cutting such radiant heat is the most efficient energy saving method.
　この輻射熱をカットする方法として従来から、屋根や外壁の室内側に断熱工事や遮熱工事を施工することが有効であるとされるが、施工費用もかかるし、厚肉の断熱材を張設することで、管理コストや搬送コストもかかってしまう。施工時に、室内に断熱材が飛散しないようにするための構成も必要とされる。例えば、従来の方法として柱等にウール状の断熱材を巻付け、さらに、その外表面にアルミニウム合金はくを巻付ける方法があった。 As a method of cutting this radiant heat, it has been said that it is effective to install heat insulation work or heat shield work on the indoor side of the roof or outer wall, but it also costs construction costs and stretches thick insulation. As a result, management costs and transport costs are also incurred. A construction for preventing the heat insulating material from scattering in the room at the time of construction is also required. For example, as a conventional method, there has been a method in which a wool-like heat insulating material is wound around a pillar or the like, and an aluminum alloy foil is wound around the outer surface thereof.
　一方、本発明の着想点は、最表面の基材からの伝熱を断熱材等で断熱しようとするのではなく、低放射性の素材を遮熱層として用い、室内の温度上昇を抑制する。金属の反射率と放射率の和が壱（１）であることから、輻射熱に対して高反射率の素材による層を含む遮熱層が、低い放射性を有している点に着目した。 On the other hand, the idea of the present invention is not to insulate heat transfer from the outermost base material with a heat insulating material or the like, but to use a low-radiation material as a heat shield layer to suppress an increase in indoor temperature. Since the sum of the reflectivity and emissivity of the metal is 壱 (1), attention was paid to the fact that the heat shielding layer including a layer made of a material having a high reflectivity with respect to radiant heat has low emissivity.
　例えば、アルミニウム合金はく（アルミホイル）やアルミ蒸着などで構成されるアルミニウム層は、輻射熱に対して９７～９８％の反射率を持ち、放射率は僅か２～３％である。また、この輻射熱に対して高反射率の素材としては、アルミニウム合金に限定されず、金や銀などの貴金属等でも達成される。また、輻射熱に対する反射率が高いほど遮熱効果は得られるので、本発明では、少なくとも輻射熱に対する反射率が９５％以上という値を有する素材を採用することが望ましい。 For example, an aluminum layer made of aluminum alloy foil (aluminum foil) or aluminum vapor deposition has a reflectivity of 97 to 98% with respect to radiant heat and an emissivity of only 2 to 3%. In addition, the material having a high reflectivity with respect to the radiant heat is not limited to the aluminum alloy, and can be achieved by a noble metal such as gold or silver. In addition, since the heat shielding effect is obtained as the reflectance with respect to radiant heat increases, in the present invention, it is desirable to employ a material having a value of at least 95% reflectance with respect to radiant heat.
　本発明により、室内が低放射の環境になれば、物質の温度を上昇させる最も大きな要因は輻射熱であるので、例えば、極寒の冬季でも酷暑の夏季でも外気温からの影響を抑えて、その室内に生活する人間や、鶏や牛等の動物の環境温度の変化を少なくすることができる。また、その室内に保管される種々の物質の温度変化も少なくすることができる。さらに、建物を移動する熱流は、夏季等の温暖期と冬季等の寒冷期で逆転するので、輻射熱に対して高反射率の素材が有する低放射性の性能を温暖期に有効に利用し、輻射熱に対して高反射率である性能を寒冷期に有効に利用することができる。 According to the present invention, when the room is in a low radiation environment, the largest factor that raises the temperature of the material is radiant heat. It is possible to reduce changes in environmental temperature of humans and animals such as chickens and cows. In addition, the temperature change of various substances stored in the room can be reduced. Furthermore, the heat flow that moves through the building reverses between the warm season such as summer and the cold season such as winter. On the other hand, the performance with high reflectivity can be effectively used in the cold season.
　また、本発明では、遮熱層がアルミニウム合金の高反射率層のみから構成される場合に、表面の金属基板（異種金属）と接触することにより電食を起こす恐れがある点に着目した。そして、本発明は、図１に示すように、アルミニウム層１の表面に厚みが１０ミクロン以下となるように電食防止膜２を形成、例えば、電食防止膜２を塗膜して形成される遮熱層を備えた遮熱材に係る。 Further, in the present invention, when the heat shield layer is composed only of a high reflectivity layer made of an aluminum alloy, attention has been paid to the possibility that electric corrosion may occur due to contact with the surface metal substrate (foreign metal). Then, as shown in FIG. 1, the present invention is formed by forming an electrolytic corrosion prevention film 2 on the surface of the aluminum layer 1 so as to have a thickness of 10 microns or less, for example, by coating the electrolytic corrosion prevention film 2. The present invention relates to a heat shielding material provided with a heat shielding layer.
　アルミニウム層１は、上述したように、例えば、アルミニウム合金はく（アルミホイル）で構成される。輻射熱に対して９７～９８％の反射率を持ち、放射率は僅か２～３％である。 As described above, the aluminum layer 1 is made of, for example, an aluminum alloy foil (aluminum foil). It has a reflectivity of 97 to 98% with respect to radiant heat, and the emissivity is only 2 to 3%.
　電食防止膜２は、絶縁性の樹脂であり、ロックウエル硬さにおいて、ポリプロピレン（以下、「ＰＰ」という。）以上の硬さであって、ポリエチレンテレフタラート（以下、「ＰＥＴ」という。）以下の硬さを有する。厚みを１０ミクロン以下としてアルミニウム層１の表面に膜形成することにより、素材における輻射熱に対する反射率の低下を、後述するように１％以内に収めることができる。この電食防止膜２は、耐酸、耐アルカリにも効果がある。 The electrolytic corrosion prevention film 2 is an insulating resin, and has a Rockwell hardness equal to or higher than that of polypropylene (hereinafter referred to as “PP”) and is equal to or lower than that of polyethylene terephthalate (hereinafter referred to as “PET”). Of hardness. By forming a film on the surface of the aluminum layer 1 with a thickness of 10 microns or less, it is possible to keep the decrease in reflectance of the material with respect to radiant heat within 1% as described later. This electrolytic corrosion prevention film 2 is also effective in acid resistance and alkali resistance.
　このような構成の絶縁性の樹脂として、例えば、ポリ塩化ビニル（ＰＶＣ）を例示することができる。また、ロックウエル硬さにおいて、ＰＰ以上の硬さであって、ＰＥＴ以下の硬さを有すること、輻射熱に対して高反射率の素材の表面に塗膜可能であること、厚みが１０ミクロン以下とされて輻射熱に対して高反射率の素材の表面に膜形成されたとき、その素材における輻射熱に対する反射率の低下が１０％以内に収まることの要件を満たす絶縁性の樹脂である限り、本発明を構成する部材として採用することができる。本発明において、ＰＰやＰＥＴを絶縁性の樹脂として採用してもよい。 As the insulating resin having such a configuration, for example, polyvinyl chloride (PVC) can be exemplified. In addition, in Rockwell hardness, it has a hardness of PP or higher and has a hardness of PET or lower, can be coated on the surface of a material having high reflectivity with respect to radiant heat, and has a thickness of 10 microns or less. As long as it is an insulating resin that satisfies the requirement that when the film is formed on the surface of a material having a high reflectivity with respect to radiant heat, the decrease in the reflectivity with respect to the radiant heat in the material is within 10%, the present invention It can employ | adopt as a member which comprises. In the present invention, PP or PET may be employed as the insulating resin.
　塗膜する絶縁性の樹脂を、ＰＰよりも柔らかい膜とすれば、表面に傷が付きやすくなって電食防止効果が薄れる虞が生じるので好ましくない。ＰＥＴよりも硬い膜とすれば、硬すぎて素材を丸める、ロールする等の取扱いが難しくなって遮熱材の取り扱いが難しくなる虞がある好ましくない。 If the insulating resin to be coated is a film softer than PP, it is not preferable because the surface is easily scratched and the effect of preventing electrolytic corrosion may be reduced. If the film is harder than PET, it is not preferable because it is too hard to handle the heat-shielding material because it is difficult to handle such as rolling or rolling the material.
　また、絶縁性の樹脂を塗膜する膜の厚みが薄いほど、輻射熱に対して高反射率の素材の反射率の低下を抑えることが可能になるが、表面に傷が付きやすくなって電食防止効果が薄れる虞が生じるので好ましくない。絶縁性の樹脂を塗膜する膜の厚みが厚いほど、電食防止効果が確実に得られるものの、厚みが１０ミクロンを超えると反射率の低下が１０％を超える場合が生じてくるので、好ましくない。したがって、絶縁性の樹脂を塗膜する膜の厚みは、３～７ミクロン程度であることが好ましい。特に、形成しやすさの観点から、絶縁性の樹脂を塗膜する膜の厚みは５ミクロンであることが好ましい。 In addition, the thinner the film that coats the insulating resin, the lower the reflectivity of the material with high reflectivity against radiant heat can be suppressed. This is not preferable because the prevention effect may be reduced. As the thickness of the film coated with the insulating resin is thicker, the effect of preventing electrolytic corrosion is surely obtained. However, if the thickness exceeds 10 microns, the reflectance may decrease by more than 10%. Absent. Therefore, the thickness of the film coated with the insulating resin is preferably about 3 to 7 microns. In particular, from the viewpoint of ease of formation, the thickness of the film that coats the insulating resin is preferably 5 microns.
　さらに、絶縁性の樹脂を輻射熱に対して高反射率の素材の表面に塗膜して膜形成したとき、形成した膜によって生じる素材の反射率の低下は、その遮熱効果を考慮すれば、１０％以内に収まることが必要である。その遮熱効果を特に考慮したとき、絶縁性の樹脂で膜形成した後の素材の反射率の低下は、５％以内に収まることが好ましい。 Furthermore, when a film is formed by coating an insulating resin on the surface of a material having a high reflectivity with respect to radiant heat, the decrease in the reflectivity of the material caused by the formed film is considered if the heat shielding effect is considered. It is necessary to be within 10%. When the heat shielding effect is particularly taken into consideration, it is preferable that the decrease in the reflectance of the material after forming a film with an insulating resin is within 5%.
　そして、出願人が信じる最良の形態として、例えば、電食防止膜２としてのポリ塩化ビニル（ＰＶＣ）を、厚みを５ミクロンとしてアルミニウム層１の表面に膜形成したとき、アルミニウム層１の輻射熱に対する反射率の低下を１％以内に収めることができる。具体的には、下記実施例で説明するように、反射率９７％だったものが９６％に低下するに過ぎないので、その遮熱効果を確実に維持することができる。また、出願人が信じる最良の形態では、電食防止効果のほか、耐酸、耐アルカリ等の効果も得ることができる。 As the best mode believed by the applicant, for example, when polyvinyl chloride (PVC) as the electrolytic corrosion prevention film 2 is formed on the surface of the aluminum layer 1 with a thickness of 5 microns, The decrease in reflectance can be kept within 1%. Specifically, as will be described in the following examples, since the reflectance of 97% is only reduced to 96%, the heat shielding effect can be reliably maintained. In addition, in the best mode believed by the applicant, in addition to the electrolytic corrosion preventing effect, effects such as acid resistance and alkali resistance can be obtained.
　本発明に係る遮熱材において、電食防止膜２は、アルミニウム層１の表面に塗布されて膜が形成されることにより構成される。したがって、電食防止膜２の材料である絶縁性の樹脂は、適宜の有機溶媒に溶けた溶液の状態でアルミニウム層１の表面に塗布される。塗膜するという観点から、この溶液に占める絶縁性の樹脂の濃度は、例えば、１５～２５重量％とするのが適当である。 In the heat shielding material according to the present invention, the electrolytic corrosion prevention film 2 is configured by being applied to the surface of the aluminum layer 1 to form a film. Therefore, the insulating resin that is the material of the electrolytic corrosion prevention film 2 is applied to the surface of the aluminum layer 1 in the state of a solution dissolved in an appropriate organic solvent. From the viewpoint of coating, the concentration of the insulating resin in the solution is suitably 15 to 25% by weight, for example.
　また、輻射熱に対して高反射率の素材への塗膜によって形成される膜が、ロックウエル硬さにおいて、ＰＰ以上の硬さであって、ＰＥＴ以下の硬さを有する絶縁性の樹脂であり、厚みを１０ミクロン以下とした膜の形成によって、輻射熱に対して高反射率の素材における輻射熱に対する反射率の低下が１０％以内に収まる。本発明に係る電食防止層形成用コーティング材は、上記実施形態において電食防止膜２の材料である絶縁性の樹脂が適宜の有機溶媒に溶けた溶液の状態で提供されるコーティング剤の剤形で提供されるが、例えば、厚みを１０ミクロン以下としたシートを貼り付けることでも構成可能である。 Further, the film formed by the coating film on the material having high reflectivity with respect to radiant heat is an insulating resin having a hardness of PP or higher and a hardness of PET or lower in Rockwell hardness, By forming a film having a thickness of 10 microns or less, the reduction in reflectance with respect to radiant heat in a material having high reflectance with respect to radiant heat is within 10%. The coating material for forming an electrolytic corrosion prevention layer according to the present invention is a coating agent provided in the form of a solution in which an insulating resin as a material of the electrolytic corrosion prevention film 2 in the above embodiment is dissolved in an appropriate organic solvent. Although it is provided in a form, for example, it can be configured by attaching a sheet having a thickness of 10 microns or less.
　また、本発明に係る遮熱材は、電食防止膜２の厚みが１０ミクロン以下、アルミニウム層１の厚みが７～３５ミクロンであるので、電食防止膜２をアルミニウム層１の両面に塗膜する場合を想定して合算しても遮熱層を、合計５５ミクロン以下の厚みとすることができる。したがって、本発明に係る遮熱材の厚みは薄く、軽量であり、嵩張ることもないため、管理コスト及び搬送コストの大幅な削減が可能である。 In addition, since the thickness of the electrolytic corrosion prevention film 2 is 10 microns or less and the thickness of the aluminum layer 1 is 7 to 35 microns, the thermal insulation material according to the present invention is coated on both surfaces of the aluminum layer 1. Even if the film is added assuming the film formation, the heat shielding layer can be made to have a total thickness of 55 microns or less. Therefore, the thickness of the heat shielding material according to the present invention is thin, lightweight, and does not become bulky, so that the management cost and the conveyance cost can be greatly reduced.
　以下、本発明に係る遮熱材の実施例について説明する。本発明は、下記実施例に限定されないで、特許請求の範囲を逸脱しない限り、適宜の構成とすることができる。 Hereinafter, examples of the heat shielding material according to the present invention will be described. The present invention is not limited to the following examples, and can be appropriately configured without departing from the scope of the claims.
　（実施例１）
　実施例１として、金属基板として厚み０．５ｍｍの化粧鋼板及び、厚み１５μｍのアルミニウム合金はくからなるアルミニウム層１と、このアルミニウム合金はくに膜厚が５．０μｍ（ミクロン）となるように塗膜して形成した電食防止層２とからなる遮熱層で構成される遮熱材に対し、腐食試験（目視観察及び反射率の能力保持測定）を実施した。具体的には、ＪＩＳ　Ａ１４１５に規定された方法に沿って高分子系建築材料の実験室光源による暴露試験を行った。 (Example 1)
As Example 1, a decorative steel sheet having a thickness of 0.5 mm as a metal substrate, an aluminum layer 1 made of an aluminum alloy foil having a thickness of 15 μm, and the aluminum alloy film are coated so that the film thickness becomes 5.0 μm (microns). A corrosion test (visual observation and reflectivity retention measurement) was performed on the heat insulating material constituted by the heat insulating layer composed of the electrolytic corrosion preventing layer 2 formed as a film. Specifically, an exposure test using a laboratory light source for a polymer building material was performed according to the method defined in JIS A1415.
　なお、電食防止層２とアルミニウム層１とを溶着して接合した後、電食防止層２が金属基板に直接接触するように接着（又は溶着）して一体化し、実施例に係る遮熱材を作製した。比較例に係る遮熱材の作製では、電食防止層を形成しないで、実施例と同じ材質及び厚みからなる金属基板とアルミニウム合金はくからなるアルミニウム層１とを接着（又は溶着）して一体化した。 In addition, after welding and joining the electric corrosion prevention layer 2 and the aluminum layer 1, the electric corrosion prevention layer 2 is bonded (or welded) and integrated so as to be in direct contact with the metal substrate. A material was prepared. In the production of the heat shielding material according to the comparative example, without forming the electrolytic corrosion prevention layer, the metal substrate having the same material and thickness as in the example and the aluminum layer 1 made of the aluminum alloy foil are bonded (or welded). Integrated.
　上記腐食試験において使用した試験機器、条件は下記［表１］に示すとおりである。 The test equipment and conditions used in the above corrosion test are as shown in [Table 1] below.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　腐食試験では、上記［表１］に記載の暴露サイクルを２０日間行った後、アルミニウム層１の金属基板との接触面の腐食の程度を確認した。この結果を図２に示す。図２において、左側の遮熱材が実施例に係るものであり、右側の遮熱材が比較例に係るものである。 In the corrosion test, the exposure cycle described in [Table 1] was performed for 20 days, and then the degree of corrosion of the contact surface of the aluminum layer 1 with the metal substrate was confirmed. The result is shown in FIG. In FIG. 2, the left heat shield material is according to the example, and the right heat shield material is according to the comparative example.
　図２から理解されるように、アルミニウム層１と金属基板との間に電食防止層２が介在する実施例に係る遮熱材で腐食が認められることがない一方、アルミニウム層１と金属基板との間に電食防止層が介在しない比較例に係る遮熱材において腐食が認められた。 As can be understood from FIG. 2, no corrosion is observed in the heat shielding material according to the embodiment in which the electrolytic corrosion prevention layer 2 is interposed between the aluminum layer 1 and the metal substrate. Corrosion was observed in the heat-shielding material according to the comparative example in which no electric corrosion prevention layer was interposed therebetween.
　また、上記腐食試験後の実施例及び比較例において、輻射熱に対する反射率低下の割合を計測したので、その結果を下記［表２］に示す。なお、［表２］において、試験体の１０１～１０５で示されるのが実施例に係る遮熱材であり、試験体の２０１～２０５で示されるのが比較例に係る遮熱材である。 Further, in the examples and comparative examples after the corrosion test, the ratio of the reflectance decrease with respect to the radiant heat was measured, and the results are shown in the following [Table 2]. In Table 2, the heat shields according to the examples are indicated by 101 to 105 of the test specimens, and the heat shields according to the comparative examples are indicated by 201 to 205 of the test specimens.
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　上記［表２］から理解されるように、実施例に係る遮熱材において輻射熱に対する反射率の低下が１％以内で収まる一方、比較例に係る遮熱材では最小でも３０％の低下が認められた。特に、比較例の５つのサンプルの平均値は、５割に近い反射率の低下となっていることが分かる。 As can be understood from the above [Table 2], in the heat shielding material according to the example, the decrease in the reflectance with respect to the radiant heat is within 1%, while in the heat shielding material according to the comparative example, a reduction of at least 30% is recognized. It was. In particular, it can be seen that the average value of the five samples of the comparative example shows a drop in reflectance close to 50%.
　（実施例２）
　 実施例２として、実施例１と同様にして構成した遮熱材及び比較例の遮熱材を一年間、屋外に設置してぼう漠状態とし、その劣化を観察する屋外試験（目視観察）を実施した。屋外においてぼう漠状態で１年間経過させることは、２０年間室内で使用することに相当する。この結果を図３に示す。図３の中央に示すのが実施例の遮熱材の拡大された外観であり、図３の両端部に示すのが比較例の遮熱材の拡大された外観である。 (Example 2)
As Example 2, an outdoor test (visual observation) was conducted in which the heat shielding material constructed in the same manner as in Example 1 and the heat shielding material of the comparative example were installed outdoors for one year to be in a vague state and observed for deterioration. Carried out. The passage of one year in a vague state outdoors corresponds to the use indoors for 20 years. The result is shown in FIG. The center of FIG. 3 shows an enlarged appearance of the heat shielding material of the example, and the both ends of FIG. 3 show the enlarged appearance of the heat shielding material of the comparative example.
　図３から理解されるように、実施例に係る遮熱材で腐食が認められることがない一方、比較例に係る遮熱材において腐食が認められた。なお、比較例の浸食された腐食部分の性能（反射率）は３０％以上低下したことも確認した。 As is understood from FIG. 3, no corrosion was observed in the heat shielding material according to the example, whereas corrosion was recognized in the heat shielding material according to the comparative example. In addition, it was also confirmed that the performance (reflectance) of the corroded corrosion portion of the comparative example was reduced by 30% or more.
　（実施例３）
　実施例３として、実施例１と同様にして構成した遮熱材及び比較例の遮熱材についてそれぞれ、図４に示すような試験室を利用し、ＪＩＳ　Ａ　４７１０（建具の断熱性試験方法）に規定された方法に沿って遮熱効果試験を実施した。 (Example 3)
As Example 3, for the heat shielding material configured in the same manner as in Example 1 and the heat shielding material of the comparative example, a test room as shown in FIG. 4 is used, and JIS A 4710 (a test method for heat insulation of joinery). The heat shielding effect test was carried out according to the method specified in 1.
　具体的には、図４に示すように、試験室は、２０℃前後に調整されている恒温室Ａと０℃前後に調整されている低温室Ｂとの境界に仕切壁Ｃが設置されている。この仕切壁Ｃは、一定の面積の開口を有する。この開口に恒温室側からサイディング（外壁材として利用される板材）Ｄ、空気層、実施例の遮熱材Ｘ又は比較例の遮熱材Ｙ、空気層、石膏ボードＥの順に設置し、実施例の遮熱材Ｘ又は比較例の遮熱材Ｙの熱貫流抵抗（ｍ2・Ｋ／Ｗ）を計測した。なお、仕切壁Ｃの恒温室Ａ側に、サイディングＤを覆って加熱箱Ｆが設置されている。開口のサイズは、２２３０×２３２５ｍｍである。 Specifically, as shown in FIG. 4, the test room has a partition wall C at the boundary between a temperature-controlled room A adjusted to around 20 ° C. and a low temperature room B adjusted to around 0 ° C. Yes. The partition wall C has an opening having a certain area. Installed in this order from the thermostatic chamber side to the siding (plate material used as the outer wall material) D, air layer, heat shield material X of the example or heat shield material Y of the comparative example, air layer, gypsum board E The heat flow resistance (m 2 · K / W) of the heat shield material X of the example or the heat shield material Y of the comparative example was measured. A heating box F is installed on the side of the constant temperature room A of the partition wall C so as to cover the siding D. The size of the opening is 2230 × 2325 mm.
　上記遮熱効果試験の結果を下記［表３］に示す。なお、［表３］において、試験体の３０１～３０３で示されるのが実施例に係る遮熱材であり、試験体の４０１～４０３で示されるのが比較例に係る遮熱材である。 The results of the heat shielding effect test are shown in [Table 3] below. In Table 3, the heat shields according to the examples are indicated by 301 to 303 of the test specimens, and the heat shields according to the comparative examples are indicated by 401 to 403 of the test specimens.
Figure JPOXMLDOC01-appb-T000003
Figure JPOXMLDOC01-appb-T000003
　上記［表３］から理解されるように、実施例に係る遮熱材は、比較例に係る遮熱材に対し、熱貫流抵抗の値の低下が１０％程度で収まっている。すなわち、実施例に係る遮熱材は電食防止層２を備えても大幅な低下とならず、その遮熱性能が維持されることが確認された。 As can be understood from the above [Table 3], the heat shield material according to the example is about 10% lower than the heat shield material according to the comparative example. That is, it was confirmed that the heat shielding material according to the example did not significantly decrease even when the electrolytic corrosion preventing layer 2 was provided, and the heat shielding performance was maintained.
　したがって、本発明に係る遮熱材は、輻射熱に対して高反射率の素材（例えば、アルミニウム層１）と、該素材の表面に厚みが１０ミクロン以下となるように塗膜されて形成される例えば、ＰＶＣからなる電食防止層２とからなる遮熱層を備えて構成される。これにより、電食防止効果と遮熱効果とを両立させた遮熱層を備える遮熱材を提供することができる。具体的には、ＪＩＳ　Ａ１４１５に準じた暴露試験により、６ヶ月後も腐食が起こらないで良好な電食防止効果が認められるとともに、９７％を示す輻射熱に対する反射率が、暴露後も９６％の値となって維持される等、１％以内の反射率の低下で収まって、十分で確実な遮熱効果を得ることができる。熱貫流抵抗の値の低下も１０％以内で収まっている。そして、本発明は、上記効果を得るための電食防止層形成用コーティング材を提供することも達成している。 Therefore, the heat shielding material according to the present invention is formed by coating a material having a high reflectance with respect to radiant heat (for example, the aluminum layer 1) and a thickness of 10 μm or less on the surface of the material. For example, it is configured to include a heat shielding layer composed of an electrolytic corrosion prevention layer 2 made of PVC. Accordingly, it is possible to provide a heat shield material including a heat shield layer that achieves both an electrolytic corrosion preventing effect and a heat shield effect. Specifically, according to an exposure test according to JIS A1415, corrosion resistance does not occur even after 6 months and a good anti-corrosion effect is recognized, and the reflectivity to 97% of radiant heat is 96% even after exposure. It can be maintained as a value, and the reflectance can be reduced within 1%, so that a sufficient and reliable heat shielding effect can be obtained. The decrease in the value of heat flow resistance is within 10%. And this invention has also achieved providing the coating material for electrolytic corrosion prevention layer formation for acquiring the said effect.
　以上、本発明について一実施形態を説明したが、本発明はこれらの実施形態に限定されることなく、特許請求の範囲に記載された事項を逸脱することがなければ、種々の設計変更を行うことが可能である。 As mentioned above, although one embodiment was described about the present invention, the present invention is not limited to these embodiments, and various design changes are made without departing from the matters described in the claims. It is possible.
　上記実施形態において、電食防止層は、高反射率層としての金属（アルミニウム層など）と、電食防止層及びアルミニウム層からなる遮熱材を適用する先である金属（金属基板）との接触を防止するものであるが、この金属基板と外部の金属或いは高反射率層と外部の金属との接触を防止する目的としても電食防止層を設けることができる。また、本発明に係る遮熱材の用途としては、金属屋根、外壁、シャッター、ドア、ＡＬＣ屋根、壁、ＲＣ屋根、壁（外壁タイル、人工大理石）等があり、鉄骨建物、農業用、高層ビルＰＣ工法、一般ビルに好適である。 In the above embodiment, the electrolytic corrosion prevention layer is composed of a metal (aluminum layer or the like) as a high reflectance layer and a metal (metal substrate) to which a heat shielding material composed of the electrolytic corrosion prevention layer and the aluminum layer is applied. In order to prevent contact, an electrolytic corrosion prevention layer can be provided for the purpose of preventing contact between the metal substrate and an external metal or a high reflectance layer and an external metal. In addition, the use of the heat shield material according to the present invention includes metal roofs, outer walls, shutters, doors, ALC roofs, walls, RC roofs, walls (outer wall tiles, artificial marble), etc., steel buildings, agricultural use, high-rise buildings Suitable for building PC construction and general buildings.
　１・アルミニウム層（高反射率層）
　２・電食防止層
　Ａ・恒温室
　Ｂ・低温室
　Ｃ・仕切壁
　Ｄ・サイディング（外壁材として利用される板材）
　Ｅ・石膏ボード
　Ｆ・加熱箱
　Ｘ・実施例の遮熱材
　Ｙ・比較例の遮熱材 1. Aluminum layer (high reflectivity layer)
2. Electric corrosion prevention layer A. Constant temperature room B. Low temperature room C. Partition wall D. Siding (plate material used as outer wall material)
E. Gypsum board F. Heating box X. Heat shield material of the example Y Heat shield material of the comparative example

Claims (3)

  1. 　輻射熱に対して高反射率の素材の表面に形成される膜が、ロックウエル硬さにおいて、ポリプロピレン以上の硬さであって、ポリエチレンテレフタラート以下の硬さを有する絶縁性の樹脂であり、厚みを１０ミクロン以下とした前記膜の形成によって、前記素材の輻射熱に対する反射率の低下が１０％以内に収まる、
    　ことを特徴とする電食防止層形成用コーティング材。     The film formed on the surface of the material having high reflectivity with respect to radiant heat is an insulating resin having a Rockwell hardness higher than that of polypropylene and lower than that of polyethylene terephthalate. By the formation of the film of 10 microns or less, the decrease in reflectance with respect to radiant heat of the material is within 10%.
    A coating material for forming an electrolytic corrosion prevention layer.
  2. 　前記素材と、該素材の表面に厚みが１０ミクロン以下となるように形成される請求項１に記載の電食防止層形成用コーティング材の膜とからなる遮熱層を備える、
    　ことを特徴とする遮熱材。     A thermal barrier layer comprising the material and a film of the coating material for forming an electrolytic corrosion prevention layer according to claim 1 formed to have a thickness of 10 microns or less on the surface of the material,
    A heat shielding material characterized by that.
  3. 　前記素材が、アルミニウム合金であることを特徴とする請求項２に記載の遮熱材。 The heat shielding material according to claim 2, wherein the material is an aluminum alloy.
PCT/JP2015/004106 2014-08-20 2015-08-19 Coating material for forming electrolytic corrosion prevention layer, and heat shielding material WO2016027456A1 (en)

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Citations (5)

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JPH05105854A (en) * 1991-10-14 1993-04-27 Aisin Chem Co Ltd Adhesive for preventing electrolytic corrosion
WO1999010168A1 (en) * 1997-08-21 1999-03-04 Toray Industries, Inc. Light metal/cfrp structural member
JP2005315283A (en) * 2004-04-27 2005-11-10 Nissin Kogyo Co Ltd Disc brake for vehicle
JP2012163164A (en) * 2011-02-08 2012-08-30 Nsk Ltd Rolling bearing for motor
WO2014021237A1 (en) * 2012-07-30 2014-02-06 日本遮熱株式会社 Heat-insulating plate

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JP3152598U (en) * 2009-05-26 2009-08-06 帝人ファイバー株式会社 Insulation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05105854A (en) * 1991-10-14 1993-04-27 Aisin Chem Co Ltd Adhesive for preventing electrolytic corrosion
WO1999010168A1 (en) * 1997-08-21 1999-03-04 Toray Industries, Inc. Light metal/cfrp structural member
JP2005315283A (en) * 2004-04-27 2005-11-10 Nissin Kogyo Co Ltd Disc brake for vehicle
JP2012163164A (en) * 2011-02-08 2012-08-30 Nsk Ltd Rolling bearing for motor
WO2014021237A1 (en) * 2012-07-30 2014-02-06 日本遮熱株式会社 Heat-insulating plate

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