• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    moisture resistant and heat resistant solar cell backsheet and method for its manufacture a moisture resistant and heat resistant solar cell backsheet comprising a weather resistant layer, a connecting layer, a structural reinforcement layer and a reflective layer, which are sequentially combined. is characterized in that the weather resistant layer is a biaxially oriented weather resistant film or is made of polyamide, heat stabilizer, ultraviolet resistant stabilizers and inorganic materials; and the structural reinforcement layer is made of polypropylene, modified polypropylene or a metallic alloy, wherein the metallic alloy is a metallic alloy of polypropylene and engineering plastics or a metallic alloy of modified polypropylene or engineering plastics. according to the solar cell backsheet, a polyamide (pa) replaces the traditional fluorine film material to serve as the weather resistant layer, so that the weather resistance performance is guaranteed and the cost is significantly reduced. however, polypropylene (pp) replaces the traditional pet material to serve as a structural reinforcement layer, such that the traditional pet layer's structural improvement problems have poor moisture resistance, heat resistance and hydrolysis resistance and from the fact that it tends to be brittle and to crack when used in a humid and hot environment for a long time are avoided, and therefore the moisture resistance, heat resistance and aging resistance of the backsheet are improved by cooperation with the weather resistant pa layer.
    公开号:BR112016015795B1
    申请号:R112016015795-8
    申请日:2014-08-04
    公开日:2021-06-15
    发明作者:Ruofei Zhao；Shuyi CAI；Wei Huang
    申请人:Suzhou Sunshine New Materials Technology Co., Ltd；
    IPC主号:
    专利说明:

    Technical scope
    [0001] The present invention relates to the scope of photovoltaic electricity production, in particular with a backsheet of solar energy. Previous Technique
    [0002] The need of human beings for energy is constantly growing, and the current scenario where the main traditional energy sources are coal and oil is not sustainable; the only way to solve the energy challenge that humans are facing is to use renewable energy. The production of photovoltaic electricity from solar energy is one of the most important sources of renewable energy. Countries around the world are competing with each other to develop photovoltaic electricity production from solar energy and to formulate and implement a roadmap for photovoltaic electricity production. Over the past five years, the global solar photovoltaic industry has been growing rapidly at a rate of 50% or more, and is forecast to continue to develop at a rate of 30% or more over the next ten years.
    [0003] Back sheets of solar energy are widely used in solar cell assemblies (photovoltaic), being located on the back of the solar cell panels, and have the effect of protecting and supporting the cells, therefore, for that they have to have reliable insulating properties, water resistance and aging resistance. Fluoroplastic films have excellent long-term outdoor aging resistance, and are used in large quantities to prepare backsheets of solar cells. A backsheet mainly comprises a three-layer structure consisting of a weather resistant layer, a structural reinforcement layer and a reflective layer; Backsheet structures commonly used today include TPT structures and TPE structures, where T represents Dupont company's Tedlar film, with polyvinyl fluoride (PVF) as a constituent, P represents a polyethylene terephthalate (PET) film, and E represents an ethylene-vinyl acetate (EVA) resin film. Therefore, the TPT structure means a PVF film/PET film/PVF film structure, while the TPE structure means a PVF film/PET film/EVA film structure, with the three film layers being bonded together by adhesive. The European company Isovolta is a typical manufacturer of back sheets with the TPT structure. Back sheets with TPE structure are a patented product of the US company Madico (see patent application WO 2004/091901 A2). At present, there are also some companies that replace PVF film with polyvinylidene fluoride (PVDF) film to provide a KPK structure and a KPE structure, where K stands for PVDF film. Additionally, there are also some US and Japanese companies which are trying to use ECTFE (ethylene chlorotrifluoroethylene copolymer) and ETFE (ethylene tetrafluoroethylene copolymer) to replace PVF film or PVDF film as weather resistant sheet material later. The 3M company uses THV (tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride) film to make weather resistant layers for solar cell backsheets (see US patent application 2006/0280922 A1); its structure is THV/PET/EVA.
    [0004] Although fluoroplastic film is used in conventional backsheets, and the long-term outdoor aging resistance is excellent, the cost of the fluoroplastic film itself is high, and this will limit its use on a larger scale. Additionally, the PET film plastic used in the structural reinforcement layer of a conventional backsheet has poor resistance to hydrolysis under hot and humid conditions, becoming brittle and cracking when used in a hot and humid environment for a long period of time, leading deterioration or failure of the performance of solar cells. Content of the invention
    [0005] The present invention overcomes the weaknesses of the prior art by providing a backsheet of solar cells that has a tight coupling between layers, excellent aging resistance in conditions of heat and humidity and a low cost, which is of enormous importance in solar energy industry.
    [0006] To achieve the above objective, the technical solution employed in the present invention is as follows: a moisture-resistant and heat-resistant solar cell backsheet, comprising a weather-resistant layer, a connecting layer, a layer of structural reinforcement and a reflective layer which are sequentially combined, characterized in that the weather resistant layer is a biaxially oriented weather resistant PA film, or made of polyamide (PA), a heat stabilizer, a UV stabilizer and a material inorganic; the structural reinforcement layer is made of polypropylene, modified polypropylene, or a metal alloy; the metal alloy is a metal alloy of polypropylene and an engineering plastic, or a metal alloy of modified polypropylene and an engineering plastic.
    [0007] Preferably, the polyamide is one or a combination of more than one selected from the following components: polyamide 6, polyamide 66, polyamide 46, polyamide 610, polyamide 612, polyamide 614, polyamide 613, polyamide 615, polyamide 616 , polyamide 11, polyamide 12, polyamide 10, polyamide 912, polyamide 913, polyamide 914, polyamide 915, polyamide 616, polyamide 1010, polyamide 1012, polyamide 1013, polyamide 1014, polyamide 1210, polyamide 1212, polyamide 1213, polyamide 1214, polyamide 6T, polyamide 9T, polyamide 10T, polyamide 12T, adipic adipamide/terephthalic adipamide, terephthalic adipamide copolyamide/isophthalic adipamide, poly(meta-dimethylbenzamide adipic acid), terephthalic adipamide/2-terephthalic adipamide/terephthalic adipamide/terephthalic adipamide/terephthalic copolyamide/adipamide adipamide isophthalic and polycaprolactam- terephthalic adipamide.
    [0008] Preferably, the melting point of the structural reinforcement layer is greater than 145 °C.
    [0009] Preferably, the modified polypropylene is formed by mixing the polypropylene and a heat stabilizer to achieve the modification, or is formed by mixing the polypropylene, grafted polypropylene and a heat stabilizer to achieve the modification, or is formed by mixing the polypropylene, a heat stabilizer and an inorganic filler to achieve the modification.
    [0010] More preferably, the polypropylene is selected from one or more of homo polypropylene (homo PP), copolypropylene and block copolypropylene.
    [0011] Most preferably, the modified polypropylene is formed by blending the polypropylene, a heat stabilizer and an inorganic filler to achieve the modification. The inorganic filler is selected from one of calcium carbonate, titanium dioxide, barium sulfate, mica, talc, kaolin, glass microspheres and glass fibers.
    [0012] Preferably, the engineering plastic is polyamide or polyphenylene oxide.
    [0013] Preferably, the connecting layer is polyethylene grafted with maleic anhydride, ethylene acrylic acid copolymer, or ethylene acrylate maleic anhydride terpolymer.
    [0014] More preferably, the connecting layer is ethylene/butyl acrylate/maleic anhydride copolymer or polypropylene grafted with maleic anhydride.
    [0015] Preferably, the thickness ratio of the weather resistant layer, structural reinforcement layer and reflective layer is 20 - 100 : 40 - 400 : 20 - 150.
    [0016] Preferably, the thickness ratio of the weather resistant layer, structural reinforcement layer and reflective layer is 30 - 60 : 150 - 300 : 20 - 150.
    [0017] Preferably, the thickness ratio of the weather resistant layer, structural reinforcement layer and reflective layer is 50 - 100 : 150 - 250 : 50 - 100.
    [0018] Preferably, the reflective layer is a polyethylene metal alloy layer.
    [0019] Most preferably, the reflective layer is formed by blending polyethylene, a copolymer containing an ethylene segment (-CH2-CH2-), a UV stabilizer and a white inorganic pigment to achieve the modification.
    [0020] Most preferably, the reflective layer is formed by blending low density polyethylene (LLDPE), a copolymer of ethylene and acetic acid (EVA), a UV stabilizer and titanium dioxide (TiO2) to achieve the modification.
    [0021] Most preferably, the reflective layer is formed by mixing low density polyethylene (LLDPE), ethylene propylene diene monomer (EPDM), a UV stabilizer and titanium dioxide (TiO2) to achieve the modification.
    [0022] Preferably, the connecting layer is also provided between the structural reinforcement layer and the reflective layer, ie, the solar cell backsheet consists of a weather resistant layer, a connecting layer, a structural reinforcement layer, a connecting layer and a reflective layer which are combined sequentially.
    [0023] The present invention also provides the following two methods of manufacturing the solar backsheet.
    [0024] Method one comprises the following steps: (1) granulating a weather resistant layer material, a connecting layer material, a structural reinforcement layer material and a reflective layer material separately by means of an extruder , to obtain weather-resistant layer plastic granules, plastic granule binding layer, structural reinforcement layer plastic granules and ready-to-use reflective layer plastic granules; (2) melting and co-extruding, by means of an extruder, the plastic granules of the weather resistant layer, the plastic granules of the connecting layer, the plastic granules of the structural reinforcement layer and the plastic granules of the reflective layer which were prepared in step (1).
    [0025] Method two comprises the following steps: (1) granulating a connecting layer material, a structural reinforcing layer material and a reflective layer material separately by means of an extruder, to obtain plastic layer granules connectors, ready-to-use plastic structural reinforcement layer plastic granules and reflective layer plastic granules; (2) melting and co-extruding, by means of an extruder, the plastic granules of the connecting layer, the plastic granules of the structural reinforcement layer and the plastic granules of the reflective layer that were prepared in step (1), and applying to the weather resistant layer.
    [0026] The present invention solves the weaknesses of the prior art, and has the following beneficial effects: 1. The solar cell backsheet of the present invention replaces the conventional fluorine film material with polyamide (PA) as the weather resistant layer so that not only weather resistance is ensured, but costs are also significantly reduced. Furthermore, replacing the conventional PET material with polypropylene (PP) as the structural reinforcement layer avoids the problem that the conventional PET structural reinforcement layer has poor resistance to hydrolysis under hot and humid conditions, and becomes brittle and cracking when used. in a hot and humid environment for a long period of time, and by cooperating with the weather resistant layer of PA, the resistance of the sheet after aging in hot and humid conditions can be further improved; 2. When the thickness ratio of the weather resistant layer, structural reinforcement layer and reflective layer is kept at 20 - 100 : 40 - 400 : 20 - 150, in particular 30 - 60 : 150 - 300 : 20 - 150, or 50 - 100 : 150 - 250 : 50 - 100, the connection between layers is firmer, the structure is more stable, and at the same time, optimum aging resistance can be achieved in hot and humid conditions; 3. The backsheet of the present invention can be prepared by melting and co-extruding multiple layers, thereby avoiding conventional adhesive, increasing productivity, and helping to protect the environment. Description of attached drawings
    [0027] The present invention is further explained in the following together with the attached drawings and embodiments.
    [0028] Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;
    [0029] Fig. 2 is a schematic structural diagram of embodiments 2-4 of the present invention;
    [0030] In the figures: 2 - weather resistant layer, 4 - first connection layer, 6 - structural reinforcement layer, 12 - reflective layer; 14 - weather resistant layer, 16 - first connection layer, 18 - structural reinforcement layer, 22 - reflective layer, 24 - second connection layer. Particular modalities of realization
    [0031] The present invention is now explained in more detail in conjunction with the accompanying drawings and embodiments. These attached drawings are all simplified schematic diagrams, which merely schematically illustrate the basic structure of the present invention, therefore, and therefore only show the structure relevant to the present invention. Mode of implementation 1
    [0032] As shown in Fig. 1, a moisture resistant and heat resistant solar cell backsheet consists of a weather resistant layer 2, a first connecting layer 4, a structural reinforcement layer 6 and a reflective layer 12 which are combined sequentially.
    [0033] The weather resistant layer 2 is made of polyamide (PA), a heat stabilizer, a UV stabilizer and an inorganic material.
    [0034] The first connecting layer 4 is polypropylene grafted with maleic anhydride.
    [0035] The structural reinforcement layer 6 has a melting point greater than 145 °C, and is made of modified polypropylene. Modified polypropylene is formed by mixing homo polypropylene (homo PP) and a heat stabilizer to achieve the modification.
    [0036] The reflective layer 12 is a polyethylene metal alloy layer. It is formed by blending polyethylene, a copolymer containing an ethylene segment (-CH2-CH2-), a UV stabilizer, and an inorganic white pigment to achieve the modification. More specifically, reflective layer 12 is formed by blending low density polyethylene (LLDPE), ethylene propylene diene monomer (EPDM), a UV stabilizer and titanium dioxide (TiO2) to achieve the modification.
    [0037] The thicknesses of the weather resistant layer 2, the first connecting layer 4, the structural reinforcement layer 6 and the reflective layer 12 of the back sheet are 50 µm, 25 µm, 250 µm and 50 µm, respectively. Methods of implementation 2-4
    [0038] As shown in Fig. 2, a moisture resistant and heat resistant solar cell backsheet differs from Embodiment 1 in that it consists of a weather resistant layer 14, a first connecting layer 16, a layer of structural reinforcement 18, a second connecting layer 24 and a reflective layer 22 which are sequentially combined.
    [0039] The weather resistant layer 14 is a weather resistant biaxially oriented PA film, or made of polyamide (PA), a heat stabilizer, a UV stabilizer and an inorganic material.
    [0040] The first connecting layer 16 is polypropylene grafted with maleic anhydride or ethylene/butyl acrylate/maleic anhydride copolymer.
    [0041] The structural reinforcement layer 18 has a melting point greater than 145 °C, and is made of modified polypropylene or a metal alloy. Modified polypropylene is formed by mixing homo polypropylene (homo PP) and a heat stabilizer to achieve the modification, or formed by mixing homo polypropylene, grafted polypropylene, and a heat stabilizer to achieve the modification. Alloy metal is a metal alloy of modified polypropylene and an engineering plastic. Engineering plastic is polyamide.
    [0042] The second connection layer 24 is the same as the first connection layer 16.
    [0043] The thicknesses of the weather resistant layer 14, the first connecting layer 16, the structural reinforcement layer 18, the second connecting layer 24 and the reflective layer 22 of the backsheet are 50 - 100 µm, 15 - 40 µm , 150 - 250 µm, 15 - 40 µm and 100 µm, respectively.
    [0044] See table 1 for the specific parameters of the solar rear leaves in embodiment 14.
    [0045] A first manufacturing method of the present invention is explained below by means of a method for manufacturing the solar backsheets of Embodiments 2-4, and comprises the following steps: (1) granulating a first layer material of connecting layer material, a material of the second connecting layer, a material of the structural reinforcement layer and a material of the reflecting layer separately by means of an extruder, to obtain plastic granules of the first connecting layer, plastic granules of the second connecting layer , plastic granules of structural reinforcement layer and plastic granules of reflective layer ready to use. A weather resistant layer film is prepared by a method commonly used in the art or purchased ready to use; The material of the first connecting layer, the material of the second connecting layer, the material of the structural reinforcement layer and the material of the reflecting layer are separately prepared by a method commonly used in the art according to a formula of the corresponding layer; (2) Melting and co-extrusion, by means of an extruder, of the plastic granules of the first bonding layer, the plastic granules of the second bonding layer, the plastic granules of the structural reinforcement layer and the plastic granules of the reflective layer which were prepared in step (1), and apply to the weather resistant layer film which was prepared in step (1). The melting and coextrusion temperature is 180°C - 310°C, preferably 240°C - 280°C.
    [0046] A second manufacturing method of the present invention is explained below by means of a method for manufacturing the solar backsheet of Embodiment 1, and comprises the following steps: (4) granulating a weather-resistant layer material. of the material of the first connecting layer, a material of the structural reinforcement layer and a material of the reflecting layer separately by means of an extruder, to obtain plastic granules of the weather-resistant layer, plastic granules of the first connecting layer, plastic granules of the structural reinforcement layer and plastic granules of the ready-to-use reflective layer; The weather-resistant layer material, the first connecting layer material, the structural reinforcement layer material and the reflecting layer material are prepared separately by a method commonly used in the art according to a formula of the corresponding layer; (5) Melting and co-extrusion, by means of an extruder, of the plastic granules of the weather resistant layer, the plastic granules of the first connecting layer, the plastic granules of the structural reinforcement layer and the plastic granules of the reflective layer which were prepared in step (1) to form a film. The melting and coextrusion temperature is 180°C - 310°C, preferably 240°C - 280°C.
    [0047] If a second connecting layer is also provided between the structural reinforcement layer and the reflective layer, a second connecting layer material can simply be added when melting and co-extrusion is carried out in the above preparation method.
    [0048] To prove the resistance to bad weather and the robustness of the solar posterior leaf of the present invention, the following determination experiment is carried out on it. Two back sheets of comparative examples 1 - 2 are selected for comparison. Comparative Example 1: An FPE backsheet is made by sequentially combining a conventional PVDF film, a biaxially oriented PET film and an EVA film after applying a polyurethane adhesive, then removing a solvent at high temperature and curing. Comparative example 2 is made by sequentially combining a weather resistant PET film, a biaxially oriented PET film and an EVA film after applying a polyurethane adhesive, then removing a solvent at high temperature and curing. The determination experiment comprises: 1. Testing the peel strength between the weather resistant layer and the structural reinforcement layer (180 degrees, with a peel rate of 0.2 m/min), using a standard ASTM D1876 method; 2. QUV ultraviolet accelerated aging test (UVA + UVB, 30 kWh/m2), using an IEC61215 standard method, to determine appearance and yellowing; 3. HAST, high pressure accelerated aging test, appearance after 96 hours of aging (121°C, 100% humidity), using a standard ASTM D1868 method; 4. Moist heat, attenuation of mounting energy after 3000 hours of aging (85 °C, 85% humidity), using a standard IEC61215 method.
    [0049] The determination results for comparative examples 1 - 2 and embodiments 1 - 4 are recorded in table 2. Table 1


    [0050]It should be explained that in table 1: when the corresponding layer has multiple components, the proportion of components is in parts by weight.
    Tinuvin 770 is bis(2,2,6,6-tetramethyl-4-piperidinyl)sebacate produced by BASF SE. Irganox B225 is a heat stabilizer produced by BASF SE. Lotader 4210 is an ethylene/butyl acrylate/maleic anhydride copolymer produced by the French company Arkema. The back sheet of comparative example 1 is an FPE sheet produced by the Japanese company Toyo Aluminum. In Comparative Example 2, the PET film is a biaxially oriented weather resistant film, and can specifically be a biaxially oriented white weather resistant film under the brand Melinex, produced by the company Dupont Teijin. The polyurethane adhesive is produced by Mitsui Chemicals of Japan under the brand name A-969V/A-5.
    [0052] Additionally, the polypropylene in maleic anhydride grafted polypropylene is homopolypropylene. Table 2

    [0053] It is evident from tables 1 and 2 that the backsheets of embodiments 1 - 4 of the present invention have significantly better weatherability compared to the backsheets of comparative examples 1 - 2, while the resistance to peeling it can also be kept at a better level. Clearly, the backsheet of the present invention has strong superiority by virtue of the combination of the weather resistant layer and the structural reinforcement layer of specific materials.
    [0054] It should be explained that embodiments 1 - 4 are merely typical solutions selected from the present invention. When the ratio of thicknesses of the weather resistant layer, structural reinforcement layer and reflective layer of the backsheet of the present invention are kept in the range of 20 - 100 : 40 - 400 : 20 - 150, the determination results of the above experiments are all better than comparative examples 1 - 2, and even better in the range of 30 - 60 : 150 - 300 : 20 - 150. The specific details will not be repeated. When the weather resistant layer of the backsheet of the present invention is made of polyamide, a heat stabilizer, a UV stabilizer and an inorganic material by a method commonly used in the art, the determination results of the above experiments are all better than comparative examples 1 - 2, and not limited to the component proportions of the embodiments; specific details will not be repeated. When the structural reinforcement layer of the backsheet of the present invention is made by a method commonly used in the art from polypropylene and a heat stabilizer, or from polypropylene, grafted polypropylene, a heat stabilizer and polyamide, the results of determination of the above experiments are all better than comparative examples 1 - 2, and not limited to the component proportions of the embodiments; specific details will not be repeated. When the reflective layer of the backsheet of the present invention is made by a method commonly used in the art from polypropylene, a copolymer containing an ethylene segment (-CH2-CH2-), a UV stabilizer and a white inorganic pigment, the determination results of the above experiments are all better than comparative examples 1 - 2, and are not limited to the component proportions of the embodiments; specific details will not be repeated.
    [0055] It should be explained that in the backsheet of the present invention: 1. In the weather-resistant layer, polyamide is selected from one or more of the following materials: polyamide 6, polyamide 66, polyamide 46, polyamide 610, polyamide 612 , polyamide 614, polyamide 613, polyamide 615, polyamide 616, polyamide 11, polyamide 12, polyamide 10, polyamide 912, polyamide 913, polyamide 914, polyamide 915, polyamide 616, polyamide 1010, polyamide 1012, polyamide 1013, polyamide 1014, polyamide 1210, polyamide 1212, polyamide 1213, polyamide 1214, polyamide 6T, polyamide 9T, polyamide 10T, polyamide 12T, adipic adipamide/terephthalic adipamide, terephthalic adipamide/isophthalic adipamide, poly(meta-dimethyl benzamide) adipamide - terephthalic methylglutaramide, adipic adipamide/terephthalic adipamide/isophthalic adipamide and polycaprolactam-terephthalic adipamide. The inorganic material can be titanium dioxide or barium sulphate; the UV stabilizer and the heat stabilizer can employ a corresponding material in common use in the art, which is not limited to the materials used in the embodiments; 2. The first connecting layer can be polyethylene maleic anhydride grafted, ethylene acrylic acid copolymer, or ethylene acrylate maleic anhydride terpolymer. It is not limited to materials in the embodiments; 3. In addition to the materials in the embodiments, the structural reinforcement layer can also be polypropylene, or a metal alloy of polypropylene and an engineering plastic. When modified polypropylene is used for the structural reinforcement layer, the modified polypropylene can also be formed by mixing polypropylene, a heat stabilizer and an inorganic filler to achieve the modification, or is formed by mixing polypropylene, grafted polypropylene and a heat stabilizer to achieve the modification, or is formed by adding a heat stabilizer, a UV stabilizer, a hardener and an inorganic filler to the polypropylene and mixing to achieve the modification. The inorganic filler is selected from one of calcium carbonate, titanium dioxide, barium sulfate, mica, talc, kaolin, glass microspheres and glass fibers; 4. In the reflective layer, the copolymer containing an ethylene segment (-CH2-CH2-) is selected from one or more of ethylene-acrylic acid copolymer, ethylene-hexene copolymer, ethylene-octene copolymer, ethylene-acetate copolymer. vinyl and ethylene acrylate copolymer. Polyethylene, UV stabilizer and white inorganic pigment can be corresponding materials in common use in the art, and are not limited to the embodiments.
    [0056] The above ideal embodiments according to the present invention serve to clarify, and relevant persons will be absolutely able to make a variety of changes and corrections, based on the content of the above description, without departing from the scope of thought of the present invention. The technical scope of the present invention is not limited to the content presented herein, and should be determined in accordance with the scope of the claims.
    权利要求:
    Claims (10)
    [0001]
    1. Rear sheet of moisture resistant and heat resistant solar cells, comprising a weather resistant layer, a connecting layer, a structural reinforcement layer and a reflective layer which are sequentially combined, wherein the weather resistant layer is a weather resistant film of biaxially oriented PA, or made of polyamide (PA), a heat stabilizer, a UV stabilizer and an inorganic material; wherein the structural reinforcing layer is made of polypropylene or modified polypropylene, or or an alloy of polypropylene or modified polypropylene and an engineering plastic, wherein the polypropylene is selected from one or more of homo polypropylene (homo PP), copolypropylene and block copolypropylene and wherein the modified polypropylene comprises polypropylene and a heat stabilizer or polypropylene, grafted polypropylene and a heat stabilizer or polypropylene, a heat stabilizer and an inorganic filler, characterized in that the reflective layer [12] is formed by blending polyethylene, a copolymer containing an ethylene segment (-CH2-CH2-), a UV stabilizer and a white inorganic pigment.
    [0002]
    2. Rear sheet of moisture resistant and heat resistant solar cells according to claim 1, characterized in that the proportion of thicknesses of the weather resistant layer, structural reinforcement layer and reflective layer is 20 - 100 : 40 - 400 : 20 - 150.
    [0003]
    3. Rear sheet of moisture resistant and heat resistant solar cells according to claim 1, characterized in that the proportion of thicknesses of the weather resistant layer, structural reinforcement layer and reflective layer is 30 - 60 : 150 - 300 : 20 - 150.
    [0004]
    4. Moisture-resistant and heat-resistant solar cell backsheet according to claim 1, characterized in that a connecting layer is also provided between the structural reinforcement layer and the reflective layer, wherein the backsheet The solar cell consists of a weather resistant layer, a connecting layer, a structural reinforcement layer, a connecting layer and a reflective layer which are sequentially combined.
    [0005]
    5. Rear sheet of moisture-resistant and heat-resistant solar cells, according to claim 1, characterized in that the melting point of the structural reinforcement layer is greater than 145 °C.
    [0006]
    6. Moisture-resistant and heat-resistant solar cell backsheet according to claim 1, characterized in that the inorganic filler is selected from calcium carbonate, titanium dioxide, barium sulfate, mica, talc , kaolin, glass microspheres and glass fibers;
    [0007]
    7. Rear sheet of moisture resistant and heat resistant solar cells according to claim 1, characterized in that the engineering plastic is polyamide or polyphenylene oxide.
    [0008]
    8. Rear sheet of moisture resistant and heat resistant solar cells, according to any one of claims 1 to 7, characterized in that the connecting layer comprises polyethylene grafted with maleic anhydride, ethylene acrylic acid copolymer, or terpolymer of maleic anhydride and ethylene acrylate.
    [0009]
    9. Method for manufacturing the moisture-resistant and heat-resistant solar cell backsheet as defined in any one of claims 1 to 8, characterized in that it comprises the following steps: (1) granulation of a resistant layer material to weather, a connecting layer material, a structural reinforcement layer material and a reflective layer material separately by means of an extruder, to obtain plastic granules of the weather-resistant layer, plastic granules of the connecting layer, granules ready-to-use plastic structural reinforcement layer and reflective layer plastic granules; (2) melting and co-extruding, by means of an extruder, the plastic granules of the weather resistant layer, the plastic granules of the connecting layer, the plastic granules of the structural reinforcement layer and the plastic granules of the reflective layer which were prepared in step (1).
    [0010]
    10. Method for manufacturing the moisture-resistant and heat-resistant solar cell backsheet as defined in any one of claims 1 to 8, characterized in that it comprises the following steps: (1) granulation of a layer material of connecting layer material, a structural reinforcement layer material and a reflective layer material separately by means of an extruder, to obtain connecting layer plastic granules, structural reinforcement layer plastic granules and reflective layer plastic granules ready to use; (2) melting and co-extruding, by means of an extruder, the plastic granules of the connecting layer, the plastic granules of the structural reinforcement layer and the plastic granules of the reflective layer that were prepared in step (1), and applying to a weather resistant layer.
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    BR112016015795A2|2020-09-24|
    JP2020017734A|2020-01-30|
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    PH12016501337A1|2016-08-22|
    ZA201604597B|2020-01-29|
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    法律状态:
    2020-10-06| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-05-11| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-06-15| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 04/08/2014, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    CN201410007109.8A|CN103715287A|2014-01-08|2014-01-08|Humidity-resistant and heat-resistant solar cell panel and manufacturing method thereof|
    CN201410007109.8|2014-01-08|
    PCT/CN2014/083604|WO2015103872A1|2014-01-08|2014-08-04|Humidity-resistant and heat-resistant solar cell backsheet and manufacturing method therefor|
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