JP2011064039A - Energy-saving window glass structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an energy-saving window glass structure and an energy-saving window glass system using the window glass structure which can retain the interior of a room or the interior of a car in a cool state in summer and in a warm state in winter and which are superior in thermal insulating performance in the interior of a room or in the interior of a car. <P>SOLUTION: The energy-saving window glass structure has a structure constituted by combining laminated glass having an intermediate film absorbing heat rays and glass reflecting the heat rays in a state where they are positioned opposite to each other. The energy-saving window glass structure is used either in the manner 1 where the glass reflecting the heat rays is directed toward the outside in summer and the glass reflecting the heat rays is directed toward the inside in winter or in the manner 2 where the glass reflecting the heat rays is removed and stored or opened in winter. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an energy-saving glazing structure capable of keeping a room cool in summer and warm in winter, and an energy-saving glazing system using the glazing structure. More specifically, the present invention relates to an energy-saving window glass structure and an energy-saving window glass system using laminated glass having a heat retaining effect by absorbing heat rays and glass having a function of reflecting heat rays.

  Conventionally, laminated glass has been widely used as window glass for vehicles such as automobiles, aircraft, buildings, etc., even if it is damaged by external impacts, it is safe with few glass fragments scattered. Yes. As such a laminated glass, an interlayer film for laminated glass made of polyvinyl acetal resin such as polyvinyl butyral (hereinafter also abbreviated as PVB) resin plasticized with a plasticizer is interposed between at least a pair of transparent glass plates, What is obtained by integrating them is used.

  However, such a laminated glass is excellent in safety, but is usually used for daylighting, and thus is affected by light components of various wavelengths of emitted sunlight.

  Among solar rays, infrared rays with a wavelength of 780 nm or more have an energy amount of about 10% as compared with ultraviolet rays, but have a large thermal effect and are released as heat when absorbed by substances as called heat rays. Especially in the summer, the temperature rises indoors and cars, which is a problem. The increase in summer temperature due to the heat rays also reduces the cooling efficiency indoors and in the car, which is a serious problem from the viewpoint of energy saving.

  For this reason, attempts have been made to prevent temperature rise indoors or in the vehicle by blocking or reflecting heat rays. As such a glass plate, for example, heat ray cut glass is commercially available. This heat-cut glass has a metal / metal oxide multi-layer coating on the surface of the glass plate by metal deposition, sputtering, etc. for the purpose of blocking direct sunlight, but this multi-layer coating layer is scratched from the outside. However, there was a problem because it was poor in chemical resistance.

  Moreover, the laminated glass which used the infrared absorber for the intermediate film for the purpose of the heat-shielding effect is proposed (for example, refer patent documents 1-3). However, these have insufficient heat insulation effects, and when the temperature is low, such as in winter, there is a problem that the heating efficiency is lowered because the sun rays cannot be taken into the room or in the car sufficiently. .

  In addition, the infrared absorbing agent to be used is required not to deteriorate the visible light transmittance when used for a transparent window glass for daylighting.

  On the other hand, an agricultural film mainly composed of polyolefin or polyvinyl chloride resin used in a greenhouse or a vinyl tunnel is required to have sunlight transmittance and heat retention. In these agricultural films, infrared rays (heat rays) radiated from the ground surface and plants are transmitted and diffused through the film at night to cool the inside. For this reason, it has been proposed to add hydrotalcite to the vinyl chloride resin in order to keep the inside warm (see, for example, Patent Documents 4 and 5). However, these are not related to the window glass and do not have a structure that reflects heat rays.

  On the other hand, a laminated glass in which hydrotalcite is added to an interlayer film of laminated glass and a metal coating layer is further provided has been proposed (for example, see Patent Document 6).

  However, since a metal coating layer that reflects heat rays is present in the laminated glass, it cannot be removed, and there is a problem that the temperature in the interior or the interior of the vehicle becomes low when the temperature is low in winter. In addition, the heat insulation performance in the room or in the vehicle was not sufficient. The hydrotalcite used for this purpose is added for the purpose of adsorbing residual ion components in order to suppress silver spots in the metal coating layer, and is used to absorb heat rays or keep warm. It is not what has been done.

JP 2001-39741 A JP 2004-75400 A JP 2004-75433 A JP 63-118374 A Japanese Patent Laid-Open No. 2001-2408 JP 2008-38093 A

  Accordingly, an object of the present invention is to provide an energy-saving window glass structure that can keep indoors and cars cool in the summer and warm in the winter, and has excellent heat retaining performance in the room or in the car, and an energy-saving window glass system using the window glass structure. Is to provide.

  That is, this invention provides the energy saving window glass structure which has the structure which combined the laminated glass which has an intermediate film which absorbs a heat ray, and the glass which reflects a heat ray so that it may oppose.

  Moreover, this invention provides the said energy saving window glass structure whose laminated glass which has the intermediate film which absorbs the said heat ray is a laminated glass which contains an infrared absorber in an intermediate film.

  Moreover, this invention provides the said energy saving window glass structure whose glass which reflects the said heat ray is glass which has a heat ray reflective film.

  Moreover, this invention provides the said energy saving window glass structure whose intermediate film of the laminated glass which has the intermediate film which absorbs the said heat ray is polyvinyl acetal resin.

  Moreover, this invention provides the said energy saving window glass structure whose said infrared absorber is a hydrotalcite.

  Moreover, this invention provides the said energy-saving window glass structure which has a 0.1-50 mm hollow layer between the laminated glass which has the intermediate film which absorbs the said heat ray, and the glass which reflects the said heat ray. is there.

  Moreover, this invention provides the said energy saving window glass structure in which either the laminated glass which has the intermediate film which absorbs the said heat ray, or the glass which reflects the said heat ray is detachable.

  Moreover, this invention provides the said energy saving window glass structure which has a structure in which either the laminated glass which has the intermediate film which absorbs the said heat ray, or the glass which reflects the said heat ray can be accommodated or open | released.

  Further, the present invention provides an energy saving window glass system using the energy saving window glass structure, wherein the glass that reflects heat rays is directed to the outdoor side in summer and the glass that reflects the heat rays is directed to the indoor side in winter. It is to provide.

  The present invention also provides an energy-saving window glass system that uses the energy-saving window glass structure and that is used by removing, storing, or opening glass that reflects heat rays in winter.

  ADVANTAGE OF THE INVENTION According to this invention, the energy-saving window glass structure which can hold | maintain the room | chamber interior and the inside of a vehicle coolly in the summer, and is warm in the winter, and is excellent in the thermal insulation performance of the room | chamber interior or the inside of a vehicle, and the energy-saving glazing system using this window glass structure Can be provided.

Hereinafter, the energy saving window glass structure of the present invention and the energy saving window glass system using the structure will be described in detail.
First, the energy saving window glass structure of the present invention will be described.

  The energy-saving window glass structure of the present invention has a structure in which laminated glass having an intermediate film that absorbs heat rays and glass that reflects heat rays are combined so as to face each other.

  The energy-saving window glass structure of the present invention is a laminated glass having an intermediate film that absorbs heat rays, obtains a heat retaining effect, and obtains a heat shielding effect with glass that reflects the heat rays.

  The laminated glass having an intermediate film that absorbs the heat rays may be in contact with the glass that reflects the heat rays, but may have a hollow layer sealed between them from the viewpoint of heat retention. In addition, another glass, a film, or a hollow layer may exist between them. The hollow layer may be filled with air or other gas, or may be a vacuum. The hollow layer may have an opening in which air or other gas in the hollow layer can be exchanged.

  In winter, winter glass (laminated glass with an intermediate film that absorbs heat rays) is arranged so that it does not come into direct contact with the outside air in order to efficiently use the heat generated from both sides of the glass generated by the infrared absorber. Preferably, summer glass (glass that reflects heat rays) can be used only at night so that radiant heat does not escape to the outdoors at night.

  When the energy-saving window glass structure of the present invention has a hollow layer, the interval is preferably 0.1 to 50 mm from the viewpoint of heat retention.

  As the laminated glass having an intermediate film that absorbs heat rays, a laminated glass having a polyvinyl acetal resin blended with an infrared absorber as an intermediate film can be used.

  The polyvinyl acetal resin is not particularly limited as long as it is a polyvinyl acetal resin obtained by acetalizing polyvinyl alcohol with an aldehyde, but a polyvinyl butyral resin is preferable. Moreover, you may use together 2 or more types of polyvinyl acetal resin as needed.

  A preferable lower limit of the degree of acetalization of the polyvinyl acetal resin is 40%, a preferable upper limit is 85%, a more preferable lower limit is 60%, and a more preferable upper limit is 75%.

  The polyvinyl acetal resin can be prepared by acetalizing polyvinyl alcohol with an aldehyde.

  Polyvinyl alcohol as a raw material for the polyvinyl acetal resin is usually obtained by saponifying polyvinyl acetate, and polyvinyl alcohol having a saponification degree of 80 to 99.8 mol% is generally used.

  Moreover, the preferable minimum of the polymerization degree of the said polyvinyl alcohol is 200, and a preferable upper limit is 3000. If it is less than 200, the penetration resistance of the resulting laminated glass may be lowered, and if it exceeds 3000, the moldability of the resin film is deteriorated, and the rigidity of the resin film is excessively increased, resulting in poor workability. Sometimes. A more preferred lower limit is 500, and a more preferred upper limit is 2000.

  Although it does not specifically limit as said aldehyde, Generally, a C1-C10 aldehyde is used suitably. The aldehyde having 1 to 10 carbon atoms is not particularly limited. For example, n-butyraldehyde, isobutyraldehyde, n-valeraldehyde, 2-ethylbutyraldehyde, n-hexylaldehyde, n-octylaldehyde, n-nonyl Examples include aldehyde, n-decyl aldehyde, formaldehyde, acetaldehyde, benzaldehyde and the like. Of these, n-butyraldehyde, n-hexylaldehyde, and n-valeraldehyde are preferable, and n-butyraldehyde having 4 carbon atoms is more preferable. These aldehydes may be used alone or in combination of two or more.

  Examples of the infrared absorber include organic infrared absorbers, silica, silicates, hydroxides or oxides of lithium, calcium, magnesium, and aluminum, aluminates, borates, and sulfates. Of these, hydrotalcite compounds are preferred from the viewpoints of infrared absorption ability and heat retention.

The hydrotalcite compound used in the present invention is a complex salt compound of magnesium and / or zinc and aluminum, and preferably a compound represented by the following general formula (I).
Mg _x1 Zn _x2 Al ₂ · (OH) _{2x1 + 2x2 + 4} · (CO ₃ ) _{1-y1 / 2} (ClO ₄ ) _y1 · mH ₂ O (I)
(Wherein, x1, x2 and y1 are numbers satisfying the conditions represented by the following formulas, 0 ≦ x2 / x1 <10, 2 ≦ x1 + x2 <20, 0 ≦ y1 ≦ 2, respectively, m is 0 or arbitrary Indicates an integer.)

  The hydrotalcite-based compound may be a natural product or a synthetic product. As methods for synthesizing such synthetic products, Japanese Patent Publication No. 46-2280, Japanese Patent Publication No. 50-30039, Japanese Patent Publication No. 51-29129, Japanese Patent Publication No. 3-36839, and Japanese Patent Publication No. Sho 61-174270. Examples of known methods described in the above. In the present invention, the hydrotalcite compound can be used without being limited by its crystal structure, crystal particle diameter, and the like.

  In addition, the hydrotalcite-based compound has a surface having a higher fatty acid such as stearic acid, a higher fatty acid metal salt such as an alkali metal oleate, an organic sulfonic acid metal salt such as an alkali metal dodecylbenzenesulfonate, and a higher fatty acid. Those coated with amide, higher fatty acid ester or wax can also be used.

  The content of the hydrotalcite compound is preferably 0.01 to 10 parts by mass, more preferably 0.1 to 5 parts by mass in 100 parts by mass of the polyvinyl acetal resin, from the viewpoint of infrared absorption effect and heat retention. . If it is less than 0.01 part by mass, the effect may not be sufficiently exhibited. If it exceeds 10 parts by mass, the transparency may be inferior.

  You may mix | blend a plasticizer with the polyvinyl acetal resin used for the said intermediate film further. The plasticizer is not particularly limited, and examples thereof include dihexyl adipate, triethylene glycol-di-2-ethylhexanoate, tetraethylene glycol-di-2-ethylbutyrate, tetraethylene glycol-di-heptanoate, and triethylene. Liquid plasticizers such as glycol di-heptanoate, organic plasticizers such as monobasic organic acid esters and polybasic organic acid esters; phosphoric acid plastics such as organic phosphoric acid and organic phosphorous acid Agents and the like.

  The monobasic organic acid ester plasticizer is not particularly limited, and examples thereof include glycols such as triethylene glycol, tetraethylene glycol, and tripropylene glycol, butyric acid, isobutyric acid, caproic acid, 2-ethylbutyric acid, and heptyl acid. , Glycol esters obtained by reaction with monobasic organic acids such as n-octylic acid, 2-ethylhexylic acid, pelargonic acid (n-nonyl acid), decyl acid and the like. Among them, triethylene glycol-dicaproate, triethylene glycol-di-2-ethylbutyrate, triethylene glycol-di-n-octylate, triethylene glycol-di-2-ethylhexyl ester, etc. Glycol and the like are preferred.

  The polybasic organic acid ester plasticizer is not particularly limited, and examples thereof include polybasic organic acids such as adipic acid, sebacic acid, and azelaic acid, and linear or branched alcohols having 4 to 8 carbon atoms. Examples include esters. Of these, dibutyl sebacic acid ester, dioctyl azelaic acid ester, dibutyl carbitol adipic acid ester and the like are preferable.

  The organophosphate plasticizer is not particularly limited, and examples thereof include tributoxyethyl phosphate, isodecylphenyl phosphate, triisopropyl phosphate, and the like.

  Although it does not specifically limit as content of the said plasticizer, A preferable minimum is 20 mass parts with respect to 100 mass parts of said polyvinyl acetal resins, and a preferable upper limit is 100 mass parts. If it is less than 20 parts by mass, the penetration resistance of the interlayer film for laminated glass may be reduced. If it exceeds 100 parts by mass, the plasticizer bleeds out, resulting in a decrease in transparency and adhesion. There is a possibility that the optical distortion of the laminated glass is increased.

  You may mix | blend an adhesive force regulator with the polyvinyl acetal resin used for the said intermediate film further. Examples of the adhesive force adjusting agent include those conventionally used as an adhesive force adjusting agent for interlayer films for laminated glass, and magnesium ions, potassium ions and the like are preferable. The adhesive strength modifier is added as an organic acid salt of the adhesive strength modifier in a mixture of a polyvinyl acetal resin and a plasticizer in the process of manufacturing the interlayer film for laminated glass. Specifically, for example, when the adhesion adjusting agent is magnesium ion, it is added as an aqueous solution of an organic acid salt such as magnesium acetate, magnesium heptanoate, magnesium octoate, magnesium nonanoate, magnesium decanoate and the like.

  Although it does not specifically limit as content of the said adhesive force regulator, A preferable minimum is 17 ppm and a preferable upper limit is 60 ppm.

  Moreover, you may mix | blend a ultraviolet absorber with the polyvinyl acetal resin used for the said intermediate film further. Examples of the ultraviolet absorber include 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 5,5′-methylenebis (2-hydroxy-4-methoxy). 2-hydroxybenzophenones such as benzophenone); 2- (2′-hydroxy-5′-methylphenyl) benzotriazole, 2- (2′-hydroxy-3 ′, 5′-ditert-butylphenyl) -5- Chlorobenzotriazole, 2- (2'-hydroxy-3'-tert-butyl-5'-methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-5'- Trioctylphenyl) benzotriazole, 2- (2′-hydroxy-3 ′, 5′-dicumylphenyl) benzotriazole, 2,2′-methylenebis 2- (2′-hydroxyphenyl) such as 4-tert-octyl-6- (benzotriazolyl) phenol) and 2- (2′-hydroxy-3′-tert-butyl-5′-carboxyphenyl) benzotriazole ) Benzotriazoles; phenyl salicylate, resorcinol monobenzoate, 2,4-ditert-butylphenyl-3,5-ditert-butyl-4-hydroxybenzoate, 2,4-ditert-amylphenyl-3,5- Benzoates such as di-tert-butyl-4-hydroxybenzoate and hexadecyl-3,5-di-tert-butyl-4-hydroxybenzoate; 2-ethyl-2′-ethoxyoxanilide, 2-ethoxy-4′-dodecyl Substituted oxanilides such as oxanilide; ethyl-α-cyano-β, β-diphenyl acrylate, methyl-2-cyano- Cyanoacrylates such as methyl-3- (p-methoxyphenyl) acrylate; 2- (2-hydroxy-4-octoxyphenyl) -4,6-bis (2,4-ditert-butylphenyl) -s -Triazine, 2- (2-hydroxy-4-methoxyphenyl) -4,6-diphenyl-s-triazine, 2- (2-hydroxy-4-propoxy-5-methylphenyl) -4,6-bis (2 , 4-ditertiarybutylphenyl) -s-triazine and the like.

  It is preferable that the usage-amount of the said ultraviolet absorber is 0.001-30 mass parts with respect to 100 mass parts of polyvinyl acetal resins, and it is more preferable that it is 0.05-10 mass parts.

  In addition, the polyvinyl acetal resin used for the intermediate film may be further added with a phenolic antioxidant, a phosphorus antioxidant, a thioether antioxidant, a hindered amine light stabilizer, etc. It is also preferable to make it.

  Examples of the phenol-based antioxidant include 2,6-ditert-butyl-p-cresol, 2,6-diphenyl-4-octadecyloxyphenol, distearyl (3,5-ditert-butyl- 4-hydroxybenzyl) phosphonate, 1,6-hexamethylenebis [(3,5-ditert-butyl-4-hydroxyphenyl) propionic acid amide], 4,4′-thiobis (6-tert-butyl-m-) Cresol), 2,2'-methylenebis (4-methyl-6-tert-butylphenol), 2,2'-methylenebis (4-ethyl-6-tert-butylphenol), 4,4'-butylidenebis (6-tertiary) Butyl-m-cresol), 2,2′-ethylidenebis (4,6-ditert-butylphenol), 2,2′-ethylidenebis (4-secondarybutyl-6-tert-butylphenol) ), 1,1,3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, 1,3,5-tris (2,6-dimethyl-3-hydroxy-4-tert-butyl) Benzyl) isocyanurate, 1,3,5-tris (3,5-ditert-butyl-4-hydroxybenzyl) isocyanurate, 1,3,5-tris (3,5-ditert-butyl-4-hydroxy) Benzyl) -2,4,6-trimethylbenzene, 2-tert-butyl-4-methyl-6- (2-acryloyloxy-3-tert-butyl-5-methylbenzyl) phenol, stearyl (3,5-di-) Tert-butyl-4-hydroxyphenyl) propionate, tetrakis [methyl 3- (3,5-ditert-butyl-4-hydroxyphenyl) propionate] methane, thiodiethylene glycol bis (3,5-ditert-butyl-4-hydroxyphenyl) propionate], 1,6-hexamethylenebis [(3,5-ditert-butyl-4-hydroxyphenyl) propionate], bis [3,3- Bis (4-hydroxy-3-tert-butylphenyl) butyric acid] glycol ester, bis [2-tert-butyl-4-methyl-6- (2-hydroxy-3-tert-butyl-5-methylbenzyl) Phenyl] terephthalate, 1,3,5-tris [(3,5-ditert-butyl-4-hydroxyphenyl) propionyloxyethyl] isocyanurate, 3,9-bis [1,1-dimethyl-2-{( 3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy} ethyl] -2,4,8,10-tetraoxaspiro [5,5] undeca And triethylene glycol bis [(3-tert-butyl-4-hydroxy-5-methylphenyl) propionate].

  The amount of the phenolic antioxidant used is preferably 0.001 to 10 parts by mass and more preferably 0.05 to 5 parts by mass with respect to 100 parts by mass of the polyvinyl acetal resin.

  Examples of the phosphorus antioxidant include trisnonylphenyl phosphite and tris [2-tert-butyl-4- (3-tert-butyl-4-hydroxy-5-methylphenylthio) -5-methylphenyl]. Phosphite, tridecyl phosphite, octyl diphenyl phosphite, di (decyl) monophenyl phosphite, di (tridecyl) pentaerythritol diphosphite, di (nonylphenyl) pentaerythritol diphosphite, bis (2,4-di Tert-butylphenyl) pentaerythritol diphosphite, bis (2,6-ditert-butyl-4-methylphenyl) pentaerythritol diphosphite, bis (2,4,6-tritert-butylphenyl) pentaerythritol diphosphite Phosphite, bis (2,4-dicumylphenyl) pen Erythritol diphosphite, tetra (tridecyl) isopropylidene diphenol diphosphite, tetra (tridecyl) -4,4′-n-butylidenebis (2-tert-butyl-5-methylphenol) diphosphite, hexa (tridecyl) -1 , 1,3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane triphosphite, tetrakis (2,4-ditert-butylphenyl) biphenylene diphosphonite, 9,10-dihydro-9 -Oxa-10-phosphaphenanthrene-10-oxide, 2,2'-methylenebis (4,6-tert-butylphenyl) -2-ethylhexyl phosphite, 2,2'-methylenebis (4,6- Tributylphenyl) -octadecyl phosphite, 2,2′-ethylidenebis (4,6- Tert-butylphenyl) fluorophosphite, tris (2-[(2,4,8,10-tetrakis tert-butyldibenzo [d, f] [1,3,2] dioxaphosphin-6-yl) Oxy] ethyl) amine, phosphite of 2-ethyl-2-butylpropylene glycol and 2,4,6-tritert-butylphenol.

  The amount of the phosphorus-based antioxidant used is preferably 0.001 to 10 parts by mass and more preferably 0.05 to 5 parts by mass with respect to 100 parts by mass of the polyvinyl acetal resin.

  Examples of the thioether-based antioxidant include dialkylthiodipropionates such as dilauryl thiodipropionate, dimyristyl thiodipropionate, distearyl thiodipropionate, and pentaerythritol tetra (β-alkylmercaptopropionate). Kind.

  The amount of the thioether-based antioxidant used is preferably 0.001 to 10 parts by mass and more preferably 0.05 to 5 parts by mass with respect to 100 parts by mass of the polyvinyl acetal resin.

  Examples of the hindered amine light stabilizer include 2,2,6,6-tetramethyl-4-piperidyl stearate, 1,2,2,6,6-pentamethyl-4-piperidyl stearate, 2,2 , 6,6-tetramethyl-4-piperidylbenzoate, bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-tetramethyl-4-piperidyl ) Sebacate, bis (1-octoxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate, tetrakis (2,2,6,6-tetramethyl-4-piperidyl) -1,2,3 4-butanetetracarboxylate, tetrakis (1,2,2,6,6-pentamethyl-4-piperidyl) -1,2,3,4-butanetetracarboxylate, bis (2,2 , 6,6-tetramethyl-4-piperidyl) -di (tridecyl) -1,2,3,4-butanetetracarboxylate, bis (1,2,2,6,6-pentamethyl-4-piperidyl). Di (tridecyl) -1,2,3,4-butanetetracarboxylate, bis (1,2,2,4,4-pentamethyl-4-piperidyl) -2-butyl-2- (3,5-di Tributyl-4-hydroxybenzyl) malonate, 1- (2-hydroxyethyl) -2,2,6,6-tetramethyl-4-piperidinol / diethyl succinate polycondensate, 1,6-bis (2 , 2,6,6-tetramethyl-4-piperidylamino) hexane / 2,4-dichloro-6-morpholino-s-triazine polycondensate, 1,6-bis (2,2,6,6-tetramethyl -4-piperidylamino) Xanthane / 2,4-dichloro-6-tert-octylamino-s-triazine polycondensate, 1,5,8,12-tetrakis [2,4-bis (N-butyl-N- (2,2,6 , 6-tetramethyl-4-piperidyl) amino) -s-triazin-6-yl] -1,5,8,12-tetraazadodecane, 1,5,8,12-tetrakis [2,4-bis ( N-butyl-N- (1,2,2,6,6-pentamethyl-4-piperidyl) amino) -s-triazin-6-yl] -1,5,8-12-tetraazadodecane, 1,6 , 11-tris [2,4-bis (N-butyl-N- (2,2,6,6-tetramethyl-4-piperidyl) amino) -s-triazin-6-yl] aminoundecane, 1,6 , 11-tris [2,4-bis (N-butyl-N- (1,2,2, , 6-pentamethyl-4-piperidyl) amino) -s-triazin-6-yl] hindered amine compounds such as aminoundecanoic the like.

  The amount of the hindered amine light stabilizer used is preferably 0.001 to 30 parts by mass and more preferably 0.05 to 10 parts by mass with respect to 100 parts by mass of the polyvinyl acetal resin.

  The polyvinyl acetal resin used for the interlayer film may include heavy metal deactivators, metal soaps, organotin compounds, epoxy compounds, antistatic agents, flame retardants, colorants, lubricants, processing aids as necessary. Agents and the like can be included. Moreover, it does not specifically limit as a shaping | molding method which manufactures an intermediate film, A well-known normal method, for example, a press method, an extrusion method, a roll method (calendar method), an inflation method, etc. are used.

Next, the glass that reflects the heat rays will be described in more detail.
The glass that reflects the heat rays may be any glass as long as a heat ray reflection layer such as a metal / metal oxide coating layer is formed on the surface of the glass plate by metal vapor deposition, sputtering, coating, or the like. Alternatively, a glass thin film or a film having a heat ray reflective layer such as the metal / metal oxide coating layer may be attached to the glass surface.

Next, the structure of the energy saving window glass structure of the present invention will be described in more detail.
The energy saving window glass structure of the present invention has a structure in which a laminated glass having an intermediate film that absorbs heat rays and a glass that reflects the heat rays are combined so as to face each other, but the laminated glass and the heat rays having an intermediate film that absorbs heat rays. Any glass that reflects light is preferably removable. Thereby, when the temperature in winter is low, the heat rays from the sun can be absorbed by removing the glass that reflects the heat rays, so that heat such as heating in the room is not released and energy can be saved. Furthermore, a heat retention effect can be expected at night and when the temperature drops.

  Further, when the temperature in summer is high, the laminated glass having an intermediate layer that absorbs heat rays may be removed. However, since the laminated glass having an intermediate layer that absorbs heat rays has a heat retaining effect, the cooling efficiency is increased by facing the indoor side, thus saving energy.

  Moreover, the energy-saving window glass structure of the present invention preferably has a structure in which both laminated glass having an intermediate film that absorbs heat rays and glass that reflects heat rays can be stored or opened. Thereby, when the temperature in winter is low, by storing or opening the glass that reflects the heat rays, the heat rays from the sun can be absorbed, and heat such as heating in the room is not released and energy can be saved. Furthermore, it has a heat retention effect at night and when the temperature drops.

  When the summer temperature is high, laminated glass having an intermediate layer that absorbs heat rays may be stored or opened. However, since the laminated glass having an intermediate layer that absorbs heat rays has a heat retaining effect, the cooling efficiency is increased by facing the indoor side, thus saving energy.

  The mechanism for attaching / detaching, storing and opening the energy-saving window glass structure of the present invention is not particularly limited.

  The energy-saving window glass structure of the present invention is preferably provided with a hollow layer between a laminated glass having an intermediate film that absorbs heat rays and a glass that reflects heat rays, or between other glasses, but the heat retention effect is increased. When dust is attached due to static electricity, the transmittance of visible light decreases. Cleaning may be facilitated by making it possible to remove one or both of laminated glass with an intermediate film that absorbs heat rays or glass that reflects heat rays, but requires more complicated cleaning work than ordinary glass Therefore, it is preferable to perform antistatic treatment.

  As the antistatic treatment, it is preferable to provide an inorganic transparent conductive film on the glass surface because the effect is sustained. It is more preferable to have a structure that can reliably remove static electricity such as grounding from the conductive film via a glass frame or the like.

Next, the usage method of the energy saving window glass structure of the present invention will be described in more detail.
As described above, as described above, in winter, it is preferable that the glass reflecting the heat rays is removed and stored or opened. In summer, the laminated glass having an intermediate film that absorbs heat rays may be removed, stored, or opened, but it is also preferable to use it toward the indoor side from the viewpoint of increasing the cooling efficiency.

  Moreover, even if it is not attached / detached / stored / opened, when the summer temperature is high, the glass reflecting the heat rays may be directed to the outdoor side, and when the winter temperature is low, it may be directed to the indoor side.

  With the energy-saving window glass structure of the present invention, the indoor heat-retaining effect is improved, and both energy for cooling and heating can be saved.

<Preparation of laminated glass (winter glass) having an interlayer that absorbs heat rays>
3 parts by mass of hydrotalcite (DHT-4A-2 manufactured by Kyowa Chemical Industry Co., Ltd.) and 40 parts by mass of a plasticizer are added to 100 parts by mass of polyvinyl butyral resin, and this is an intermediate having a thickness of 0.2 mm. As a film, two pieces of glass having a length of 25 cm, a width of 45 cm, and a thickness of 1 mm were bonded together to produce a laminated glass having an intermediate film that absorbs heat rays.

<Production of glass (summer glass) that reflects heat rays>
An aluminum foil having a thickness of 23 μm was pasted as a reflective film on the surface of a glass having a thickness of 1 mm and a length of 25 cm × width of 45 cm to obtain a glass that reflects heat rays.

<Production of energy-saving window glass structure>
The glass that reflects the heat rays is fixed with a gap of 2 mm so that the aluminum foil surface of the glass that reflects the heat rays is on the side of the laminated glass having the intermediate film that absorbs the heat rays. A structure was produced.

<Production of test equipment>
An opening having a height of 20 cm and a width of 40 cm is provided on the side surface of the cardboard box having a height of 30 cm, a width of 50 cm, and a depth of 50 cm at a distance of 5 cm from the top, bottom, left, and right. An energy saving window glass structure was installed from the inside of the cardboard box at a distance of 2.5 cm from the top, bottom, left and right of the opening.

[Example 1 and Comparative Examples 1-3]
<Summer effect test>
The energy-saving window glass structure is installed in a cardboard box so that the glass that reflects heat rays is on the outside, and the opening is located at a distance of 1 m from a 1200 W infrared kotatsu at room temperature of 30 ° C. The temperature in the cardboard box 30 minutes after putting was measured. The results are shown in Table 1.

As a comparative example, the following three points were measured in the same manner.
Comparative Example 1 No Infrared Absorber Comparative Example 2 No Aluminum Foil Comparative Example 3 No Infrared Absorber + No Aluminum Foil

[Example 2 and Comparative Examples 4 to 6]
<Effect test in winter>
An energy-saving window glass structure is placed in a cardboard box so that the glass structure having an intermediate layer that absorbs heat rays is on the outside, and an opening is placed at a distance of 1 m from an infrared cot of 1200 W at room temperature of 0 ° C. Then, the temperature in the cardboard box 30 minutes after the power to the kotatsu was turned on was measured. Further, after the measurement, the power supply of the kotatsu was turned off, and the temperature 30 minutes after the turn-off was measured. The results are shown in Table 1.

As a comparative example, the following three points were measured in the same manner.
Comparative Example 4 No Infrared Absorber Comparative Example 5 No Aluminum Foil Comparative Example 6 No Infrared Absorber + No Aluminum Foil

  The application of the energy-saving window glass structure of the present invention is not particularly limited. For example, architectural glass, building materials, window materials, automobile windshields, side glasses, rear glasses, roof glasses; glass parts of vehicles such as aircraft and trains, etc. Is mentioned. In addition, the system using the energy saving glazing structure of the present invention can save energy for heating and cooling. In addition, the energy-saving window glass structure of the present invention can be expected to have an effect of preventing a person at the window from being directly warmed by infrared rays due to the winter glass, and is also effective for making the indoor environment uniform.

Claims (10)

  An energy-saving window glass structure having a structure in which laminated glass having an intermediate film that absorbs heat rays and glass that reflects heat rays are combined so as to face each other.   The energy saving window glass structure according to claim 1, wherein the laminated glass having an intermediate film that absorbs heat rays is a laminated glass containing an infrared absorber in the intermediate film.   The energy-saving window glass structure according to claim 1 or 2, wherein the glass that reflects the heat rays is a glass having a heat ray reflective film.   The energy saving window glass structure according to any one of claims 1 to 3, wherein the interlayer film of the laminated glass having the interlayer film that absorbs heat rays is a polyvinyl acetal resin.   The energy-saving window glass structure according to any one of claims 2 to 4, wherein the infrared absorber is hydrotalcite.   The energy-saving window glass structure according to any one of claims 1 to 5, wherein a hollow layer of 0.1 to 50 mm is provided between the laminated glass having an intermediate film that absorbs the heat rays and the glass that reflects the heat rays. body.   Either the laminated glass which has the intermediate film which absorbs the said heat ray, or the glass which reflects the said heat ray has a structure which can be attached or detached, The energy saving window glass structure in any one of Claims 1-6.   Either the laminated glass which has the intermediate film which absorbs the said heat ray, or the glass which reflects the said heat ray has a structure which can be accommodated or open | released, The energy saving window glass structure in any one of Claims 1-7.   The energy-saving window glass structure according to any one of claims 1 to 8 is used. In summer, the glass that reflects heat rays is directed to the outdoor side, and in winter, the glass that reflects the heat rays is used to face the indoor side. Energy-saving window glass system.   An energy-saving glazing system using the energy-saving glazing structure according to any one of claims 1 to 8, wherein the glass reflecting heat rays is removed, housed or opened in winter.