WO2013021253A1 - Feuilles de support pour modules photovoltaïques - Google Patents

Feuilles de support pour modules photovoltaïques Download PDF

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Publication number
WO2013021253A1
WO2013021253A1 PCT/IB2012/001488 IB2012001488W WO2013021253A1 WO 2013021253 A1 WO2013021253 A1 WO 2013021253A1 IB 2012001488 W IB2012001488 W IB 2012001488W WO 2013021253 A1 WO2013021253 A1 WO 2013021253A1
Authority
WO
WIPO (PCT)
Prior art keywords
outer layer
layer
sheet according
sheet
photovoltaic module
Prior art date
Application number
PCT/IB2012/001488
Other languages
English (en)
Inventor
Luigi D'arco
Gianni Galetti
Original Assignee
Coveme Spa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Coveme Spa filed Critical Coveme Spa
Publication of WO2013021253A1 publication Critical patent/WO2013021253A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
    • 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
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04—Homopolymers or copolymers of esters
    • C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09D133/062—Copolymers with monomers not covered by C09D133/06
    • C09D133/066—Copolymers with monomers not covered by C09D133/06 containing -OH groups
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/06—Polyethene

Definitions

  • the present invention relates to the field of back sheets for photovoltaic modules.
  • the present invention relates to back sheets for photovoltaic modules and to a process for producing same.
  • Solar cells are used to convert sunlight into electrical energy by the photovoltaic effect. Solar cells represent, therefore, one of the most promising sources of alternative energy intended to replace fuel sources. They are built of semiconductor materials and they are assembled to form the so called photovoltaic modules which, in turn, are grouped to form the photovoltaic arrays typically installed on rooftops or the like.
  • groups of solar cells are usually encapsulated by encapsulating materials such as Ethylene-vinyl acetate (EVA).
  • EVA Ethylene-vinyl acetate
  • the encapsulating material sealing the solar cells is then sandwiched between a surface layer and a back sheet completing the photovoltaic module.
  • the surface layer, or primary surface of the module usually made of glass or of thermoplastic materials, covers the surface of the module exposed to the sun and allows the sunlight to reach the cells.
  • the back sheet performs a multiplicity of tasks. It ensures protection for the encapsulation material and the solar cells from environmental effects. In particular, the back sheet prevents moisture, oxygen and weather related factors to damage the encapsulating material and the cells.
  • the back sheet allows increasing the mechanical strength of the module and protecting the encapsulation material and the cells from mechanical damages. Furthermore, the back sheet must exhibit high opacity for aesthetical purposes and high reflectivity for functional purposes.
  • PVF Polyvinyl fluoride
  • Tedlar® is characterized by limited availability and high costs increasing therefore the costs related to the production of photovoltaic modules and degrading the cost per watt ratio of the system.
  • Document CA 261 1594 A1 describes a method for producing laminates for encapsulating solar cell systems wherein at least one weather-resistant plastic layer comprising fluoropolymers is applied on a carrier material.
  • the carrier material is pretreated by application of additional adhesive substances or of an inorganic oxide layer such as a silicon oxide layer.
  • the fluoropolymers are dispersed in solvents solutions. Also this solution, therefore, is characterized by the drawbacks related to the presence of adhesive substances easily degraded by humidity and UV radiation and to the employment of strong solvents.
  • a further problem related to back sheets for photovoltaic modules comprising polyester layers concerns the tendency of the polyester sheets to contract when heated.
  • the polyester layer contracts under the effect of the external temperature, the bonding to the adjacent layers is damaged and the module degrades undergoing a sort of exfoliation process.
  • back sheets for photovoltaic modules without fluoropolymers so as to have materials easy to recycle and/or to dispose at the end of life of the product. It is a further object of the present invention to provide back sheets for photovoltaic modules comprising polyester layers wherein no contraction of the polyester layers occurs under the effect of the external temperature.
  • a back-sheet for photovoltaic modules comprising an outer layer adapted to form the exterior outermost side of the photovoltaic module and an inner layer in direct contact with the outer layer as defined in claim 1 .
  • the outer layer comprises an acrylic polyol resin cross-linked with an alkoxy melamine.
  • the present invention further provides a method for the production of back sheets for photovoltaic modules, as defined in claims 13 and 14 and in the following specification.
  • the present invention provides, moreover, the photovoltaic module as defined in claim 12 and in the following specification.
  • Figure 1 schematically shows a sectional view of the layers forming a back sheet for photovoltaic modules according to a preferred embodiment of the present invention.
  • Figure 2 schematically shows a sectional view of the application of a back sheet as shown in Figure 1 in a photovoltaic module.
  • Figure 3 schematically shows the process for forming a back sheet according to a preferred embodiment of the present invention.
  • Figure 4 schematically shows the process for forming a back sheet for a photovoltaic module according to a further preferred embodiment of the present invention.
  • Figure 1 schematically shows a sectional view of the layers forming a back sheet for a photovoltaic module according to a preferred embodiment of the present invention.
  • Layer 1 is the external layer of the back sheet: it is placed at the air side of the module and it is directly exposed to air and thus to the elements.
  • the outer layer 1 is adapted to form the outermost layer on the back side of the photovoltaic module, namely on the surface of the module which is opposed to the main surface.
  • Layer 2 is the second layer of the back sheet and it is an internal layer.
  • Reference number 1 a refers to the internal surface of the external layer 1 .
  • Reference number 2a relates to the surface of the layer 2 which is to be bound with the surface 1 a of the external layer 1 .
  • Element 3 represents an intermediate adhesive element.
  • Layer 4 is a layer with primer functionality, it can be of the same nature of the encapsulant used to encapsulate the cells of the photovoltaic module and it is placed at the inner side of the back sheet toward the photovoltaic cells.
  • the internal layer 2 may comprise a polyester layer.
  • the internal layer 2 may consist of a polyester layer.
  • the internal layer 2 may comprise polyethylene naphthalate (PEN) or ethylene chlorotrifluoroethylene (ECTFE).
  • PEN polyethylene naphthalate
  • ECTFE ethylene chlorotrifluoroethylene
  • the internal layer 2 may have a thickness in the range between 50 micrometers and 350 micrometers.
  • the surface 2a of the internal layer 2 is pre-treated so as to improve the adhesion to the outer layer 1 .
  • the corona treatment allows the oxidation of the surface 2a by means of a high frequency biased electrode which ionizes the air in contact with the surface 2a of the layer 2 oxidizing the surface and thus increasing the wetting and the polarity of the surface so as to guarantee a stable and long lasting bonding of the outer layer 1 on the internal layer 2.
  • the outer layer 1 comprises an acrylic polyol resin.
  • the outer layer 1 comprises an acrylic polyol resin cross-linked with an alkoxy melamine and, preferably, with an isocyanate.
  • the alkoxy melamine is particularly advantageous because it causes a first partial reticulation of the layer 1 .
  • the first partial reticulation due to the alkoxy melamine allows reducing the adhesiveness of the layer 1 so as to enable to wind the system on reels.
  • the probability of the incurrence of blocking phenomena during winding and/or unwinding of the reel is strongly reduced.
  • the presence of the isocyanate efficiently enables the subsequent complete reticulation of the product in the course of time.
  • the outer layer 1 may be formed by means of the deposition of a solvent based solution of an acrylic polyol resin on the surface 2a of the internal layer 2 followed by the cross-linking reaction of the solution.
  • the solvent comprise: esters (for example ethyl acetate or butyl acetate), ketones (for example Methyl ethyl ketone), glycol ethers (for example Propylene Glycol Methyl Ether or Propylene Glycol Methyl Ether Acetate).
  • the solvents can be mixed according to several ratios.
  • the solvent can be dosed so as to guarantee an optimized spreading of the resin. Furthermore, the solvent can be dosed so as to guarantee a quick drying of the system in the ovens.
  • the surface 2a of the layer 2 may be functionalized by means of a corona treatment, i.e. a surface oxidation, for example of a polyester (PET) layer, induced by means of a high frequency biased electrode which ionizes the air in contact with the layer 2 oxidizing its surface and thus increasing the wetting and the polarity of the surface so as to guarantee a stable and long lasting bonding of the coating on the surface 2a of the layer 2.
  • a corona treatment i.e. a surface oxidation, for example of a polyester (PET) layer
  • PET polyester
  • a high frequency biased electrode which ionizes the air in contact with the layer 2 oxidizing its surface and thus increasing the wetting and the polarity of the surface so as to guarantee a stable and long lasting bonding of the coating on the surface 2a of the layer 2.
  • the solvent that carries the resin enables a complete wetting of the layer 2 thanks to its low surface tension.
  • the outer layer 1 may comprise an acrylic polyol resin cross-linked with polyisocyanates based on the chemistry of Methylene diphenyl diisocyanate (MID), of Toluene diisocyanate (TDI), of Hexamethylene diisocyanate (HDI) or of Isophorone diisocyanate (IPDI).
  • MID Methylene diphenyl diisocyanate
  • TDI Toluene diisocyanate
  • HDI Hexamethylene diisocyanate
  • IPDI Isophorone diisocyanate
  • polyisocyanates based on the chemistry of Hexamethylene diisocyanate (HDI) or of Isophorone diisocyanate (IPDI) are especially advantageous because they are light-stable and do not yellow.
  • the thickness of the outer layer 1 is in the micrometers range. In particular, the thickness may for example vary between 6 micrometers and 20 micrometers.
  • the outer layer 1 may comprise at least one UV stabilizer.
  • the acrylic resin is weather resistant and thus guarantees a high durability of the back sheet even in the presence of extreme weather conditions. Furthermore, the acrylic resin is resistant to UV radiations so that the outer layer 1 is not damaged by the UV radiation. Nevertheless, the acrylic resin is transparent to UV radiation so that this radiation may reach and damage the internal layer 2. In particular, if the internal layer 2 comprises polyester, then it is easily damaged by the UV radiation. For this reason, the outer layer 1 is advantageously provided with at least one filter for the UV radiation. Examples of UV filters may comprise: benzotriazoles, hydroxyphenil triazines, benzophenones or titanium dioxide.
  • the outer layer 1 may further comprise one or more light stabilizers.
  • Light stabilizers stop free radicals which could render the outer layer 1 opaque.
  • Examples of light stabilizers comprise: piperidine derivatives, HALS (Hindered Amine Light Stabilizers), or phenols (Hindered Phenols).
  • UV filters such as Tinuvin series 300 (346-37-327 BTZ) and series 400 (400-479) may be employed in an acrylic polyol system in a solvent with an hydroxyl number from 1 to 5% cross-linked with an aliphatic isocyanate and an alkoxy melamine in combination with light stabilizers such as Tinuvin 292 or 152.
  • Tinuvin 152 (low migration HALS) comprises a primary reactive hydroxyl which can react with isocyanates and alkoxy melamines covalently binding to the acrylic resin.
  • Tinuvin 1 130 which is a UV filter comprising a primary hydroxyl which is cross-linkable in the same way to the acrylic polyol resin so as to increase the stability of the resin, especially for completely transparent systems.
  • a further example is that of employing for the formation of the outer layer 1 acrylic polyol resins comprising a light stabilizer and a UV filter bonded to the main chain.
  • resins which can be employed for this purpose comprise UVG resins produced by Shokubai, for example the acrylic polyol resin Halsybryd UVG 137 comprising in the chain both the UV filter and the light stabilizer.
  • Ti02 is employed as whitening material and for stabilizing and further protecting the resin, in particular for acting as a filter for UV radiation.
  • the particles content of Ti02 depends on the thickness of the layer. For thin layers, the Ti02 concentration should be increased in order to obtain the necessary filtering properties for the UV radiation.
  • the Ti02 quantity preferable for filtering UV radiation is comprised between 2 and 5 grams per square meter.
  • the percentage dosage of the pigment in the formula may vary from 10% to 50% so as not to distort the properties of the acrylic resin of the coating. In particular, for thicknesses of the coating comprised between 10 and 20 micrometers, this dosage of ⁇ 02 allows the application of 2 grams per square meter working with formulations wherein the ratio between the pigment and the acrylic resin is comprised between 15 percent and 35 percent without unduly loading the resin with the consequent problems that could arise.
  • the presence of light stabilizers such as HALS increases the light stability of the layer, thus reducing the chemical etching effects due to the free radicals which could lead to the tarnishing of the layer in the course of time.
  • Light stabilizers such as those of the Tinuvin® series by BASF with a dosage from 1 to 5 percent by weight of the resin increase the light resistance of the coating thus reducing the chemical etching effect due to the free radicals.
  • the cross-linking reaction of this solution coated on the internal layer 2 in order to form the outer layer 1 is performed in a range of temperatures between 1 0°C and 160° C.
  • the reaction is started at 150°C in drying ovens and can be then performed for a time varying between 3 and 6 days at a temperature between 30° C and 50°C so as to complete the reaction.
  • pigments may be added to the solution of the acrylic resin in order to give any desired color to the outer layer 1 .
  • Layer 3 is an adhesive layer that bonds together the internal side of the layer 2 (i.e. the side of the layer 2 facing towards the photovoltaic cells) with the primer layer 4.
  • An example of such adhesive is a polyurethane two components system where the co- reactant is a diisocyanate aliphatic or aromatic.
  • the primer layer 4 is preferably a polyolefin film where the side that has to be bonded with the layer 3 is preferably corona treated prior to the lamination.
  • FIG. 1 schematically shows a sectional view of the application of a back sheet as shown in Figure 1 to a photovoltaic module.
  • the layer 4 is bound to the encapsulating material 5 sealing the solar cell 6 during a lamination process allowing the layers 4 and 5 melting together.
  • the figure displays the primary surface 7 of the module exposed to sunlight and generally made of glass or thermoplastic materials.
  • Figure 3 schematically shows the process for forming a back sheet for a photovoltaic module according to a preferred embodiment of the present invention along a manufacturing line 100.
  • An unwinder 101 provides the line 100 with a sheet adapted to form the internal layer 2, for example a polyester sheet.
  • a dispersion of a solvent based solution of an acrylic polyol resin is applied on the surface of the sheet at the station 106 of the line 100.
  • the oven 108 is employed for the cross linking reaction of the material deposited at the station 106.
  • the oven 108 operates preferably in a temperature range between 1 10°C and 160°C.
  • the oven 1 10 is employed to perform a thermo-stabilization process of the sheet obtained from the oven 108.
  • the oven 1 10 preferably operates in a temperature range between 160°C and 200°C.
  • This process allows the polyester sheet to relax so as to avoid the contraction process when it is subject to high temperatures, for example to temperatures which are higher than the vitreous transition temperature (approximately 78°C for polyester).
  • the final back sheet is not subjected to exfoliation processes under the effect of the external temperature.
  • the protective sheet obtained from the oven 1 10 is finally collected by the winder 1 12.
  • the protective sheet collected by the winder 1 12 comprises the layers 1 and 2 bonded to each other at the surfaces 1 a and 2a, respectively.
  • the presence of the alkoxy melamine during the cross linking reaction performed in the oven 108 causes a first partial reticulation that enables to reduce the adhesiveness of the layer 1 so as to allow promptly winding the system by means of the winder 1 12. Since the system is cross linked by means of alkoxy melamine, blocking phenomena during winding and/or possible unwinding of the reels are avoided.
  • isocyanate further enables the efficient completion of the cross linking reaction in the course of time.
  • the completion of the cross linking reaction may thus advantageously occur when the system is already wound on the reels.
  • Elements 107, 109 and 1 1 1 of the line 100 schematically represent the actuators of the line 100 adapted to control the advancement of the sheet.
  • Figure 4 schematically shows the process for forming a back sheet for a photovoltaic module according to a further preferred embodiment of the present invention along a manufacturing line 200.
  • the unwinder 201 provides the line 200 with a protective sheet comprising an internal layer and an external layer adhered to the surface of the internal layer, the external layer comprising an acrylic polyol resin with possible additives. Possible blocking phenomena are reduced in this phase thanks to the partial reticulation of the outer layer due to the presence of alkoxy melamine.
  • the unwinder 201 may be coupled to the winder 1 12 of figure 3.
  • an adhesive substance is deposited on the surface of the protective sheet opposite to the surface of the outer layer.
  • the oven 204 operates in a temperature range between 90°C and 130°C in order to evacuate the solvent present in the adhesive substance.
  • the protective sheet obtained from the oven 204 comprises the layer 2 bonded at one side with the layer 1 and, at the other side, with the layer 3.
  • the unwinder 205 provides the line 200 with a sheet of primer material.
  • the unwinder 205 may provide the line with a sheet of corona pre-treated polyolefin film.
  • the sheet of primer material provided by the unwinder 205 and the sheet obtained from the oven 204 are adhered to each other by the nip roll 206.
  • the sheet obtained from the nip roll 206 comprises the adhering layers 1 , 2, 3 and 4.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Laminated Bodies (AREA)
  • Photovoltaic Devices (AREA)

Abstract

L'invention concerne une feuille de support pour un module photovoltaïque ayant une longue durée de vie même dans des conditions météorologiques extrêmes. De plus, la feuille de support selon la présente invention est bon marché. L'invention concerne également un procédé de fabrication de feuilles de support pour modules photovoltaïques. La feuille de support selon la présente invention comprend une couche externe (1) apte à former le côté extérieur du module photovoltaïque et une couche interne (2) en contact direct avec la couche externe (1). La couche externe (1) comprend une résine de polyol acrylique réticulée par une alcoxy mélamine. La couche externe (1) peut en outre comprendre au moins un filtre UV et/ou un ou plusieurs photostabilisants. De plus la couche externe (1) peut en outre comprendre du dioxyde de titane (TiO2).
PCT/IB2012/001488 2011-08-05 2012-08-02 Feuilles de support pour modules photovoltaïques WO2013021253A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000227A ITVI20110227A1 (it) 2011-08-05 2011-08-05 Back-sheets per moduli fotovoltaici
ITVI2011A000227 2011-08-05

Publications (1)

Publication Number Publication Date
WO2013021253A1 true WO2013021253A1 (fr) 2013-02-14

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PCT/IB2012/001488 WO2013021253A1 (fr) 2011-08-05 2012-08-02 Feuilles de support pour modules photovoltaïques

Country Status (2)

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IT (1) ITVI20110227A1 (fr)
WO (1) WO2013021253A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4960828A (en) * 1987-08-07 1990-10-02 Kansai Paint Company, Limited Scratch resistant top coating composition
CA2611594A1 (fr) 2005-07-21 2007-01-25 Isovolta Ag Procede de fabrication de lamines resistants aux intemperies destines a l'encapsulage de systemes de cellules solaires
US20070154704A1 (en) 2005-12-30 2007-07-05 Debergalis Michael Fluoropolymer coated films useful for photovoltaic modules
JP2008108879A (ja) * 2006-10-25 2008-05-08 Toppan Printing Co Ltd 太陽電池モジュール用のバックシート及び該バックシートを用いた太陽電池モジュール
US20080264484A1 (en) 2007-02-16 2008-10-30 Marina Temchenko Backing sheet for photovoltaic modules and method for repairing same
WO2010061738A1 (fr) * 2008-11-28 2010-06-03 東レ株式会社 Film pour feuille d'étanchéité de face arrière pour cellules solaires
EP2345705A1 (fr) * 2010-01-12 2011-07-20 Rohm and Haas Company Procédé de production de module photovoltaïque

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4960828A (en) * 1987-08-07 1990-10-02 Kansai Paint Company, Limited Scratch resistant top coating composition
CA2611594A1 (fr) 2005-07-21 2007-01-25 Isovolta Ag Procede de fabrication de lamines resistants aux intemperies destines a l'encapsulage de systemes de cellules solaires
US20070154704A1 (en) 2005-12-30 2007-07-05 Debergalis Michael Fluoropolymer coated films useful for photovoltaic modules
JP2008108879A (ja) * 2006-10-25 2008-05-08 Toppan Printing Co Ltd 太陽電池モジュール用のバックシート及び該バックシートを用いた太陽電池モジュール
US20080264484A1 (en) 2007-02-16 2008-10-30 Marina Temchenko Backing sheet for photovoltaic modules and method for repairing same
WO2010061738A1 (fr) * 2008-11-28 2010-06-03 東レ株式会社 Film pour feuille d'étanchéité de face arrière pour cellules solaires
EP2345705A1 (fr) * 2010-01-12 2011-07-20 Rohm and Haas Company Procédé de production de module photovoltaïque

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 200846, Derwent World Patents Index; AN 2008-H23374, XP002665998 *
DATABASE WPI Week 201038, Derwent World Patents Index; AN 2010-G10019, XP002665997 *
DECKER C ET AL: "Photodegradation and photooxidation of thermoset and UV-cured acrylate polymers", POLYMER DEGRADATION AND STABILITY, BARKING, GB, vol. 64, no. 2, 1 May 1999 (1999-05-01), pages 293 - 304, XP004294664, ISSN: 0141-3910, DOI: 10.1016/S0141-3910(98)00205-5 *

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