A kind of sealing tape for double-glass photovoltaic module and preparation method thereof
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A sealing tape and double-glass photovoltaic technology, applied in the field of sealants, can solve the problems of glue liquid prone to defects, waste, weak sealing, etc., and achieve the effect of blocking moisture penetration, reducing production costs, and improving sealing performance.
Active Publication Date: 2018-04-27
康达新材料(集团)股份有限公司
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Problems solved by technology
[0012] 1. The curing speed of silica gel is relatively slow, generally more than one day, which greatly affects the efficiency of assembly line operations, and occupies a large area of space and inventory;
[0013] 2. Silicone relies on moisture to cure, and the glue inside the laminate is prone to defects;
[0014] 3. The ability to prevent moisture from penetrating is poor, and the sealing performance is weak;
[0015] 4. The amount of glue used for silica gel is large, and the excess glue will cause waste, and the cleaning will take time and effort, and the cost will be high;
[0016] 5. Silicone and double-sided tape seals are only suitable for packages with frames
Method used
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preparation example Construction
[0054] A kind of preparation method as aforementioned sealing tape, it comprises the steps:
[0055] The butyl polymer is successively carried out rubber mixing;
[0056] Adding polyester resin, tackifier, filler, antioxidant, random copolymerized polypropylene, no requirement for the order of addition, mixing the rubber to obtain the primary material of the sealing tape, and then extruding and calendering to make a rubber strip.
[0057] The mixing temperature is less than 180°C, and the extrusion temperature is controlled at less than 180°C.
[0058] The polyester resin in the present invention can choose DYNACOLL 7000 for use.
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Abstract
The invention discloses a sealing tape for a double-glass photovoltaic module, which is composed of the following components by weight percentage: butyl polymer: 1-30%; tackifier: 5-25%; polyester resin : 1-20%; random copolymerized polypropylene: 1-20%; antioxidant: 0.5-3%; filler: 20-79%; UV absorber and colorant: 1-10%. The advantages of the present invention are: 1. It does not need to be cured, and it can be used immediately after sticking. 2. It avoids the problem of relying on moisture curing, and the glue inside the lamination is prone to defects; 3. It has better ability to block moisture penetration and sealing performance, and the water vapor transmission rate is less than 0.85g / m224h; 4. . It is not only suitable for packaging with a frame, but also for components without a frame; 5. The volume resistivity is greater than 1010Ω·cm.
Description
technical field [0001] The invention relates to a sealing tape used for a double-glass photovoltaic module and a preparation method thereof, belonging to the technical field of sealants. Background technique [0002] The solar double-glass photovoltaic module is a composite layer composed of two pieces of glass with solar cells in the middle. The cells are composed of wire strings and parallel lead terminals. It is a kind of solar photovoltaic module. It is characterized by replacing the backsheet material of traditional photovoltaic modules with glass. [0003] The backsheet materials of traditional photovoltaic modules include TPT, PVF, PVDF, PET and other materials or other composite materials, but there are many disadvantages. Glass has great advantages as a backsheet material: [0004] 1. The water permeability of glass is 0, while traditional backplane materials have high water permeability. The water vapor passing through the backplane can cause the internal EVA resi...
Claims
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Application Information
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