Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
  • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
  • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
  • H01L31/042—PV modules or arrays of single PV cells
  • H01L31/048—Encapsulation of modules
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
  • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
  • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
  • H01L31/042—PV modules or arrays of single PV cells
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
  • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
  • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
  • H01L31/042—PV modules or arrays of single PV cells
  • H01L31/048—Encapsulation of modules
  • H01L31/049—Protective back sheets
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
  • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
  • H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
  • Y02B10/00—Integration of renewable energy sources in buildings
  • Y02B10/10—Photovoltaic [PV]
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E10/00—Energy generation through renewable energy sources
  • Y02E10/50—Photovoltaic [PV] energy

Definitions

• the present invention relates to a method for the production of solar modules, in which air pockets are avoided.
• Solar modules are components for direct generation of electricity from sunlight. Key factors for a cost-efficient generation of solar power are the efficiency of the solar cells used, as well as the manufacturing costs and the durability of the solar modules.
• a solar module usually consists of a framed composite of glass, interconnected solar cells, an embedding material and a backside construction.
• the individual layers of the solar module have to fulfill the following functions.
• the front glass protects against mechanical and weather influences. It must have the highest transparency in order to minimize absorption losses in the optical spectral range of 300 nm to 1150 nm and thus efficiency losses of the silicon solar cells usually used for power generation. Normally, hardened, low-iron white glass (3 or 4 mm thick) is used whose transmittance in the above spectral range is 90 to 92%. Furthermore, the glass provides a significant contribution to the rigidity of the module.
• the embedding material (usually EVA (ethyl vinyl acetate) films) serves to bond the entire module assembly. EVA melts during a lamination process at about 150 ° C, flows into the interstices of the soldered solar cells and crosslinked by a thermally initiated chemical reaction. A formation of air bubbles, which lead to reflection losses, is avoided by a lamination under vacuum.
• EVA ethyl vinyl acetate
• the back of the module protects the solar cells and the embedding material from moisture and oxygen. In addition, it serves as a mechanical protection against scratching, etc. when mounting the solar modules and as electrical insulation.
• another glass or a composite foil can be used.
• PVF polyvinyl fluoride
• PET polyethylene terephthalate
• PVF aluminum PVF are used.
• the encapsulating materials used in the back of the solar module construction must in particular have good barrier properties against water vapor and oxygen. Water vapor or oxygen does not attack the solar cells themselves, but causes corrosion of the metal contacts and chemical degradation of the EVA embedding material. A destroyed solar cell contact leads to a complete failure of the module, since normally all the solar cells are electrically connected in series in a module. Degradation of the EVA is indicated by yellowing of the module, associated with a corresponding reduction in power through light absorption and visual deterioration.
• solar modules In order to achieve competitive electricity generation costs of solar power despite the relatively high investment costs, solar modules have to achieve long operating times. Today's solar modules are therefore designed for a service life of 20 to 30 years. In addition to high weather stability The temperature requirements of the modules are very demanding, and their temperature during operation can vary cyclically between 80 ° C in full sunlight and temperatures below the freezing point. Accordingly, solar modules will undergo extensive stability testing (N o rm tests na ch I EC 61 2 15 and I EC 61730), which will include weathering tests (UV irradiation, damp heat, temperature cycling) as well as hail impact tests and electrical insulation tests.
• US Pat. No. 4,830,038 and US Pat. No. 5,008,062 describe the attachment of a plastic frame around the relevant solar module, which is obtained by the RIM process (Reaction Injection Molding).
• the polymeric material used is an elastomeric polyurethane.
• Said polyurethane should preferably have an E modulus in a range of 200 to 10,000 psi (corresponding to about 1.4 to 69.0 N / mm 2 ).
• reinforcing members of, for example, a polymeric material, steel, or aluminum may be incorporated into the frame when formed.
• fillers can be incorporated into the frame material. These may be, for example, platelet-type fillers such as the mineral wollastonite or needle-like / fibrous fillers such as glass fibers.
• DE 37 37 183 A1 also describes a method for producing the plastic frame of a solar module, wherein the Shore hardness of the reinforced part of the frame is selected such that a sufficient rigidity of the frame and a thickness are achieved elastic absorption of the solar generator is ensured.
• the modules described above are erected by means of stand constructions or, for example, mounted on roof structures. You need a certain modulus rigidity, which is adversely affected by a (plastic) frame and the relatively heavy, approx. 3 to 4 mm thick windscreen results. In addition, the front screen already has a certain absorption due to its thickness, which in turn adversely affects the efficiency of the solar module.
• Foil modules are the embedding of solar cells between two plastic films, if appropriate also between a front-side, translucent film and a flexible metal sheet (aluminum or stainless steel) on the rear side.
• a metal sheet aluminum or stainless steel
• "UNIsolar ®” brand laminates consist of thin, thin-film silicon vapor deposited on thin stainless steel sheet sandwiched between two plastic sheets, which must then be adhered to a rigid support structure such as sheet metal roof shells or metal sandwich panels
• DE 10 2005 032 716 A1 describes a flexible solar module 11 which has to be applied axially on a rigid support structure 11.
• the disadvantage here is the additional working step, the subsequent bonding with a supporting structure.
• US 2003/0178056 A1 discloses a solar module which has a first and a second protective layer, wherein the solar cells are sealed between these two layers. Between the second, waterproof layer and the solar cells is an insulating film, which consists of a plastic.
• the second, waterproof protective layer comprises films, which include a metal foil.
• the metal foil used here is an aluminum, iron or zinc foil.
• a weatherproof film for sealing a photovoltaic module is also known from DE 102 31 401 AI.
• the weatherproof layer is made up of a plurality of polymer layers, wherein here additionally a moisture-proof layer of aluminum, galvanized steel, silicon oxide, titanium oxide or zirconium dioxide is present between the polymer layers.
• a corresponding photovoltaic module is produced in layered construction.
• EP 1 302988 A2 describes a photovoltaic module and a method for its production.
• a special adhesive layer is described, which consists of an aliphatic thermoplastic polyurethane.
• the solar elements are embedded.
• the solar module includes a cover plate and a backsheet.
• One possible manufacturing process here is lamination with the aid of a roll laminator.
• a laminate of a cover plate or film and an adhesive film is produced in a roll laminator.
• a composite of cover with adhesive film; Solar strings; Composite of back and adhesive film introduced one above the other.
• the 3 individual components are joined together. This requires the exact alignment of the 3 components to each other.
• the solar module has a rear side made of a sandwich element.
• a sandwich element comprises a core layer and outer layers applied thereto.
• the Outer layers of fiber-reinforced plastic give the element a high rigidity.
• the sandwich element has a low weight.
• the solar module should have as low as possible a basis weight and at the same time be as rigid as possible, so that it does not require only one simple support or fixing structure and it is necessary easy to handle. Furthermore, the solar module should have sufficient composite long-term stability to prevent delamination and / or moisture from entering.
• the object is achieved by a method according to the invention.
• the invention therefore provides a method for producing a solar module (10) comprising a sandwich element (6), one or more solar elements (3) embedded in an adhesive layer (2) and a transparent layer (1) facing a light source in operation characterized in that in a first step a first composite (7) comprises a sandwich element (6) comprising at least one core layer (5) and at least one outer layer (4) located on each side of the core layer (5), and an adhesive layer (2b ) will be produced,
• a second composite (8) is produced, which has the transparent layer (1), an adhesive layer (2a) and at least one solar element (3) and
• the composites from the first and the second step are connected to one another via the respective adhesive surfaces.
• a second composite (8) is produced, which is the at least one solar element (3) which is connected via an adhesive layer (2a) with one in operation of the light source facing transparent layer (1), that when bringing together no air is trapped in the final product over the adherends of the two composites.
• a sandwich element (6) via the adhesive layer (2b) is not flat on a composite (8) of transparent layer (1), Solar element (3) and adhesive layer (2a) is placed.
• the two adhesive layers (2a) and (2b) may consist of the same or of different materials.
• the composites (7) and (8) are optionally connected to one another under the influence of temperature and / or optionally under the application of a vacuum.
• a method according to the invention thus makes it possible to produce a solar module (10) according to FIG. 1, which has a sufficiently high stability due to the sufficiently high bending strength of the sandwich element (6). Due to this sufficiently high rigidity, the solar module (10) is easy to handle and does not bend even after a long time.
• the composite long-term stability of such a composite is also very good, since the difference between the coefficient of thermal expansion of the sandwich element (6) is very small compared to that of the transparent layer (1) and that of the solar cells. Therefore, mechanical stresses hardly occur and the risk of delamination is very low.
• the sandwich element (6) furthermore serves to seal the solar module (10) against external influences.
• a sandwich element (6) comprises at least one core layer (5) and at least one outer layer (4) located on each of the core layer (5).
• rigid foams preferably polyurethane (PUR) - or polystyrene foams, Balsahölzer, corrugated sheets, spacers (for example, from large-pore open plastic foams), honeycomb structures, for example, metals, impregnated papers or plastics, or from the state of the art (for example, K lein, B., Le ichtba u-construction, Verlag Vieweg, Braunschweig / Wiesbaden, 2000, page 186 ff.) known sandwich core materials are used.
• moldable, in particular thermoformable rigid foams (eg rigid polyurethane foams) and honeycomb structures which enable a curved or three-dimensional shaping of the solar module (10) to be produced.
• rigid foams with good insulating properties are furthermore particularly preferred.
• the element, in particular the core layer (5) also serves for the insulation, in particular the thermal insulation.
• rigid polyurethane foams of the type Baynat 81IF60B / Desmodur VP are suitable.
• PU 0758 from Bayer Material Science AG with a bulk density of 30 to 150 kg / m 3 , preferably from 40 to 120 kg / m 3 , particularly preferably from 50 to 100 kg / m 3 (measured according to DIN EN ISO 845).
• These rigid foams have an off-line of> 10%, preferably> 12%, more preferably> 15% (measured according to DIN EN ISO 845), a Compressive strength> 0.2 MPa, preferably> 0.3% MPa, more preferably> 0.4 MPa (measured in the compression test according to DIN EN 826) and a compressive modulus> 6 MPa, preferably> 8 MPa, more preferably> 10 MPa (measured in compression test according to DIN EN 826).
• the outer layers (4) are in particular on both sides of the core layer (5) arranged fiber layers, which are impregnated, for example, with a resin, in particular a polyurethane resin.
• the polyurethane resin used for example, is obtainable by reacting
• At least one polyol component having an average OH number of 300 to 700 and containing at least one short-chain and one long-chain polyol, the starting polyols having a functionality of 2 to 6,
• long-chain polyols are preferably suitable polyols having at least two to a maximum of six isocyanate-reactive hydrogen atoms; Polyester polyols and polyether polyols which have OH numbers of from 5 to 100, preferably from 20 to 70, particularly preferably from 28 to 56, are preferably used.
• Preferred short-chain polyols are those which have OH numbers of 150 to 2000, preferably 250 to 1500, particularly preferably 300 to 1100.
• pMDI types diphenylmethane diisocyanate series
• Water is in quantities from 0 to 3.0, preferably 0 to 2.0 parts by weight per 100 parts by weight of polyol formulation (components ii) to vi)) are used.
• Suitable foam stabilizers are preferably polyether siloxanes, preferably water-soluble components.
• the stabilizers are usually used in amounts of from 0.01 to 5 parts by weight, based on 100 parts by weight of the polyol formulation (components ii) to vi)).
• the reaction mixture for the preparation of the polyurethane resin can optionally be added to auxiliaries, release agents and additives, for example surface-active additives, such as. Emulsifiers, flame retardants, nucleating agents, antioxidants, lubricants and mold release agents, dyes, dispersants, blowing agents and pigments.
• surface-active additives such as. Emulsifiers, flame retardants, nucleating agents, antioxidants, lubricants and mold release agents, dyes, dispersants, blowing agents and pigments.
• the components are reacted in amounts such that the equivalence ratio of the NCO groups of the polyisocyanates i) to the sum of the isocyanate-reactive hydrogens of components ii) and iii) and optionally iv), v) and vi) 0.8: 1 to 1.4: 1, preferably 0.9: 1 to 1.3: 1.
• glass fiber mats, glass fiber mats, Glasmaschinewirrlagen, glass fiber fabric, cut or ground glass or mineral fibers, natural fiber mats and knitted fabrics, cut natural fibers, and fiber mats, nonwovens and knitted fabric based on polymer, carbon or Aramid fibers and their mixture can be used.
• the production of the sandwich elements (6) can be carried out such that initially on both sides of the core layer (5) a fiber layer is applied, which is acted upon by the polyurethane starting components i) to vi).
• a fiber reinforcing material can also be introduced with the polyurethane raw materials i) to vi) by means of a suitable mixing head technique.
• the thus prepared blank from the three layers is transferred to a mold and the mold is closed.
• the reaction of the PU R components bonds the individual layers together.
• the sandwich element (6) is characterized by a low weight per unit area of 1500 to 4000 g / m 2 and a high flexural strength of 0.5 to 5 ⁇ 10 6 N / mm 2 (based on 10 mm sample width).
• the sandwich element (6) in comparison to other supporting structures of plastics or metals, such as plastic blends (polycarbonate / acrylonitrile-butadiene-styrene, polyphenylene oxide / polyamide), sheet-molding compound (SMC) or aluminum and steel sheet in comparable Bending stiffness significantly lower basis weights.
• Such a sandwich element (6) is, as already mentioned, the sealing of the solar module (10) against external influences.
• the core layer (5) of the sandwich element (6) is endangered even by weathering, especially moisture.
• a peripheral plastic material (9) is applied to a finished solar module (10).
• This is preferably made of reinforced, in particular glass fiber reinforced polyurethanes. 4 shows a corresponding module.
• Reinforced polyurethane in particular the edge-surrounding plastic material (9) is understood as meaning PUR which contains fillers for reinforcement.
• the fillers are preferably synthetic or natural, in particular mineral fillers. Most preferably, the fillers are selected from the group consisting of: mica, platelet and / or fibrous wollastonite, glass fibers, carbon fibers, aramid fibers or their mixtures. Fibrous wollastonite is preferred among these fillers because it is cheap and readily available.
• the fillers preferably have a coating, in particular an aminosilane-based coating.
• a coating in particular an aminosilane-based coating.
• the interaction between the fillers and the polymer matrix increases. This results in better performance properties as the coating permanently bonds fiber and polyurethane matrix.
• the fillers are typically dispersed in the polyol formulation.
• the peripheral plastic material (9) is injected, for example, by the known from the prior art R-RIM process to the finished solar module (10).
• the finished solar module (10) is placed in a mold and the frame (9) injected around the solar module (10),
• polyurethanes used according to the invention for the frame (9) are obtainable, for example, by reacting
• polyether polyol having a number average molecular weight of from 800 g / mol to 25,000 g / mol, preferably from 800 to 14,000 g / mol, particularly preferably from 1000 to 8000 g / mol and having an average functionality of from 2.4 to 8 , particularly preferably from 2.5 to 3.5, and c) optionally further from b) different polyether polyols having a number average molecular weight of from 800 g / mol to 25,000 g / mol, preferably from 800 to 14,000 g / mol, particularly preferably from 1,000 to 8000 g / mol and with average functionalities, from 1.6 to 2.4, preferably from 1.8 to 2.4 and d) optionally polymer polyols having contents of 1 to 50 wt .-% of fillers based on the polymer polyol, and with OH numbers of 10 to 149 and average functionalities of 1.8 to 8, preferably from 1.8 to 3.5, and e) optionally polymer polyo
• polyurethanes are preferably prepared by the prepolymer method, advantageously in the first step from at least part of the polyether polyol b) or its mixture with polyol component c) and / or d) and at least one di- or polyisocyanate a) an isocyanate group exhibiting Polyadditionsaddukt is produced.
• massive PUR elastomers can be prepared from such prepolymers containing isocyanate groups by reaction with low molecular weight chain extenders and / or crosslinkers e) and / or the remaining part of the polyol components b) and optionally c) and / or d). If water or other blowing agents or mixtures thereof are used in the second step, microcellular PU elastomers can be prepared.
• polyether polyols are particularly preferred because of their higher hydrolytic stability.
• the fastening of the solar module (10) to the respective substrate can take place both via the sandwich element (6) and via the edge-surrounding plastic material (9).
• the solar module (10) therefore preferably in the sandwich element (6) or the peripheral plastic material (9) already integrated fastening means, recesses and / or holes, via which an attachment can then take place.
• the sandwich element (6) also preferably receives the electrical connection elements, so that a subsequent attachment of, for example, junction boxes can be omitted.
• the in the finished solar module (10) in operation of a light source facing transparent layer (1) may consist of the following materials: glass, polycarbonate, polyester, polymethylmethacrylate, polyvinyl chloride, fluorine-containing polymers, epoxies, thermoplastic polyurethanes or any combination of these materials. Furthermore, it is also possible to use transparent polyurethanes based on aliphatic isocyanates.
• the isocyanates used are HDI (hexamethylene diisocyanate), IPDI (isophorone), isocyanate (saturated methylene diphenyl diisocyanate), and isocyanate diisocyanate.
• Polyol component used are polyethers and / or polyester polyols and chain extenders, preferably aliphatic systems are used.
• the transparent layer (1) can be designed as a plate, film or composite film.
• a transparent protective layer for example in the form of a lacquer or a plasma layer.
• the transparent layer (1) could be set softer, whereby voltages in the module can be further reduced. Protection against external influences would take over the additional protective layer.
• the adhesive layer (2) preferably has the following properties: high transparency in the range from 350 nm to 1150 nm, good adhesion to silicon and to the material of the transparent layer and to the sandwich element (6).
• the adhesive layer (2) is soft to compensate for the stresses caused by the different coefficients of thermal expansion of the transparent layer (1), solar cells and sandwich element (6).
• the adhesive layer (2) is a transparent plastic layer.
• she consists for example, EVA, polyethylene or silicone rubber; Preferably, it consists of a thermoplastic polyurethane, which may be colored in the case of the light-remote layer (2).
• media lines can be pressed with. These lines can be made of plastic or copper, for example. These lines are preferably placed close to the adhesive layer (2) and can be used for cooling the solar module (10) via a heat-removing medium (eg water). By an internal cooling of the solar module (10), the electrical efficiency can be increased.
• a heat-removing medium eg water
• the solar modules (10) produced according to the invention generate electricity and at the same time act as an insulating layer, so that they can be used well as a roofing. They are very light and stiff at the same time. By pressing, they can also be converted into three-dimensional structures, so that they can be well adapted to given roof structures.
• solar modules (10) produced according to the invention are suitable for use as a facade element. Due to their design, they can be well adapted to corresponding surface structures.
• the film solar laminate thus consists, for example, of a transparent heat-sensitive coating (eg, EVA, TPU, P E, transparent adhesives with adhesion promoters) and solar cells applied thereon.
• a transparent heat-sensitive coating eg, EVA, TPU, P E, transparent adhesives with adhesion promoters
• Both parts, sandwich element and film solar laminate are connected for example in a vacuum laminator.
• the production of the sandwich element is separated from the production of the film solar laminate.
• the preparation of a preferred polyurethane-based sandwich element can for example, by means of spraying.
• spray particles can reach the Folienlamiant and pollute the solar module or affect its function.
• a 125 pm-thick polycarbonate film (Makrofol type ® DE 1-4 from Bayer MaterialScience AG, Leverkusen, Germany) was used as a front layer.
• As Schmelzkleb Anlagen a 480 pm thick TPU film was used (type Vista ® from Solar Etimex, Rottenacker).
• the individual components in the order polycarbonate film, TPU film and 4 silicon solar cells combined into a laminate and evacuated in a vacuum laminator (NPC, Tokyo, Japan) at 150 ° C for 6 minutes and then 7 minutes at 1 bar pressure to a film - Pressed solar laminate.
• NPC vacuum laminator
• a sandwich element a Baypreg ® sandwich was used.
• a paper honeycomb of the type Testliner 2 (A-wave, Wackenicke 4.9-5.1 mm from Wabenfarbik, Chemnitz) on both sides with a random fiber mat type M 123 with a weight per unit area of 300 g / m 2 (the company Vetrotex , Herzogenrath).
• 300 g / m 2 of a reactive polyurethane system were then sprayed on both sides with a high-pressure processing machine on both sides.
• the structure of paper honeycomb and the sprayed polyurethane random fiber mat was transferred into a pressing tool, in which on the bottom of a previously inserted TPU film (480 pm, type Vista solar ® from Etimex, Rottenacker) was.
• the mold was tempered to 130 ° C and the assembly was crimped for 90 seconds to a 10mm thick sandwich.
• the individual components in the construction film-solar laminate and Baypreg ® sandwich were combined and first evacuated in a vacuum laminator (NPC, Tokyo, Japan) at 150 ° C for 6 minutes and then pressed for 7 minutes at 1 bar pressure to a solar module.
• NPC vacuum laminator
• Example 2 Analogously to Example 1, for the production of the sandwich element, first a Baynat rigid polyurethane foam board (Baynat 81IF60B / Desmodur VP.PU 0758 system from Bayer MaterialScience AG (10 mm thickness, bulk density 66 kg / m 3 (measured in accordance with DIN EN ISO 845), Openness 15.1% (measured according to DIN EN ISO 4590-86), pressure modulus of elasticity (measured according to DIN EN ISO 826) of 11.58 MPa and a compressive strength of 0.43 MPa (measured according to DIN EN ISO 826) , occupied on both sides with a random fiber mat type m 123 having a basis weight of 300 g / m 2 (manufactured by Vetrotex, Herzogenrath).
• Baynat rigid polyurethane foam board Bayer MaterialScience AG (10 mm thickness, bulk density 66 kg / m 3 (measured in accordance with DIN EN ISO 845), Openness 15.1% (measured according to DIN EN ISO 4590
• a reactive polyurethane system having a high-pressure processing machine were then both sides of 300 g / m 2 sprayed. It was a polyurethane system from Bayer MaterialScience AG, Leverkusen consisting of a polypol (Baypreg ® VP. Used 01IF13 PU) and an isocyanate (Desmodur ® VP. 08I PU F01) in a mixing ratio of 100 to 235.7 (code 29).
• this structure of polyurethane foam board and sprayed with polyurethane random fiber mats was transferred to a press tool in which on the bottom of a previously inserted TPU film (480 pm, type Vistasolar ® from Etimex, Rottenacker) was.
• the mold was tempered to 130 ° C and the assembly was crimped for 90 seconds to a 10mm thick sandwich.

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