Dip-coating equipment for specialized back film of solar cell

Abstract

The invention belongs to the technical field of coiled material dip-coating equipment, and discloses dip-coating equipment for a specialized back film of a solar cell. The dip-coating equipment comprises a rack, a driving system, a discharging device, first dip-coating rollers, first carrier rollers and a receiving device; the discharging device, the dip-coating rollers and the first carrier rollers are all arranged on the rack; dipping tanks are arranged on the rack, and the dipping tanks, the first dip-coating rollers and the first carrier rollers are horizontally arranged side by side; andthe height of the upper edges of the first carrier rollers is the same as that of the upper edges of the first dip-coating rollers, the first dip-coating rollers are located over the dipping tanks, the height of the bottoms of the first dip-coating rollers is smaller than that of the upper edges of the dipping tanks, and the driving system is used for driving the receiving device to rotate. The dip-coating equipment for the specialized back film of the solar cell is simple in structure, uniform in dip-coating surface, small in error, high in precision, low in cost and high in practical value.

Description

technical field [0001] The invention belongs to the technical field of dip-coating equipment for coils, and in particular relates to a dip-coating equipment for a solar cell special back film. Background technique [0002] In the manufacturing process of solar cell back film, lamination process and roller coating process are usually adopted. [0003] The composite process is to use a pre-formed polymer film, and use a matching special adhesive to bond with the substrate PET under a certain temperature and pressure; the photovoltaic cell back film produced by this process will have large defects. That is, during the use process, the intermediate adhesive is aged and fails due to aging, resulting in delamination, bulging, and cracking between the polymer film and the substrate PET. [0004] The roller coating process uses high-viscosity fluorocarbon resin. The fluorocarbon resin is coated on the surface of the substrate PET by the roller coating process, and then the semi-fin...

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Problems solved by technology

[0003] The composite process is to use a pre-formed polymer film, and use a matching special adhesive to bond with the substrate PET under a certain temperature and pressure; the photovoltaic cell back film produced by this process will have large defects. That is, during the use process, due to aging, the intermediate adhesive will age and fail, resulting in delamination, bulging, and cracking between the polymer film and the substrate PET.

[0004] The roller coating process uses high-viscosity fluorocarbon resin. The fluorocarbon resin is coated on the surface of the substrate PET by the roller coating process, and then the semi-finished product is scraped with a scraper knife. This process will cause major defects, that is, during the reprocessing process , due to the vibration of the equipment, the scraping knife vibrates, resulting in the phenomenon of less glue or even no glue on the surface of the product, and because the viscosity of the fluorocarbon resin is too high, it is difficult to fully and uniformly cure the material, resulting in the material being more prone to loss of gloss, turtle Cracking and pulverization, the above two process defects are more obvious, and the cost is very high

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