Preparation method of ageing-resistant and yellowing-resistant ethylene-vinyl acetate (EVA) adhesive film
A anti-yellowing and anti-aging technology, applied in adhesives, film/sheet adhesives, non-polymer adhesive additives, etc., can solve problems such as low processing temperature, high production cost, and reduced light transmittance , to achieve the effect of improving bonding strength, prolonging service life and improving conversion efficiency
Active Publication Date: 2013-11-20
杭州新子光电科技有限公司
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Problems solved by technology
[0002] When the solar cell module is packaged, if the cell is directly exposed to the air, its photoelectric conversion will drop quickly and lose its practical value. Therefore, the cell needs to be packaged with EVA film
However, when the packaged cells are used for a long time, the inevitable ultraviolet light degradation reaction of the EVA film itself will lead to the generation of chromophores, which will cause the EVA to yellow and age during long-term use and reduce the light transmittance.
The EVA adhesive film produced according to the existing configuration method and existing molding technology has low processing temperature, long curing and lamination time, low efficiency, high production cost, and low bonding strength of the produced EVA adhesive film in the battery pack package. defect
Method used
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Embodiment 1
[0012] Embodiment 1: a kind of anti-aging anti-yellowing EVA film preparation method, it is mainly made of following raw materials: 100 parts of ethylene-vinyl acetate copolymers; 1.1-18 parts of peroxide cross-linking agents; phenols or 0.05-12 parts of phosphite antiaging agent; 0.05-8 parts of hindered amine light stabilizer; 0.05-8 parts of ultraviolet absorber; 0.1-3 parts of silane tackifier.
Embodiment 2
[0013] Embodiment 2: The preparation method of this anti-aging and anti-yellowing EVA film preferably uses the following mass ratio to make: 100 parts of ethylene-vinyl acetate copolymer; 10-18 parts of peroxide crosslinking agent; phenols or 10-12 parts of phosphite anti-aging agent; 0.05-8 parts of hindered amine light stabilizer; 0.05-8 parts of ultraviolet absorber; 0.1-3 parts of silane tackifier.
Embodiment 3
[0014] Embodiment 3: The preparation method of the anti-aging and anti-yellowing EVA film is preferably made by using the following mass ratio: 100 parts of ethylene-vinyl acetate copolymer; 10 parts of peroxide crosslinking agent; phenols or phosphorous acid 10 parts of ester anti-aging agent; 8 parts of hindered amine light stabilizer; 8 parts of ultraviolet absorber; 3 parts of silane tackifier.
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Abstract
The invention relates to a preparation method and forming technology of an ageing-resistant and yellowing-resistant ethylene-vinyl acetate (EVA) adhesive film. The preparation method and the forming technology have the advantages that through reasonably controlling the constant heating temperature of each region of a screw extruder, controlling the temperature and the extrusion pressure of an extrusion die head, controlling the cooling temperature in a rubber roller, a flower roller, a cooling roller and a forming box, the high-quality EVA adhesive film can be produced; as antioxidant is added to the EVA adhesive film, an EVA copolymer is prevented from being aged at high temperature in a screw extrusion process; and meanwhile, after silane tackifier is added to the EVA adhesive film, the bonding strength of the adhesive film in the production process of a battery pack can be improved, so except that the EVA film is more resistant to yellowing, ageing and ultraviolet rays when in use, the conversion efficiency of the solar battery pack is greatly improved and the service life of the solar battery pack is prolonged.
Description
technical field [0001] The invention relates to the field of solar cell adhesive films, in particular to a method for preparing an anti-aging and anti-yellowing EVA adhesive film. Background technique [0002] When the solar cell module is packaged, if the cell is directly exposed to the air, its photoelectric conversion will drop quickly and lose its practical value. Therefore, the cell needs to be packaged with EVA film. When the encapsulated cell is used for a long time, the inevitable ultraviolet light degradation reaction of the EVA film itself will lead to the generation of chromophores, which will cause the EVA to yellow and age during long-term use and reduce the light transmittance. The EVA adhesive film produced according to the existing configuration method and existing molding technology has low processing temperature, long curing and lamination time, low efficiency, high production cost, and low bonding strength of the produced EVA adhesive film in the battery p...
Claims
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IPC IPC(8): B29C47/92C09J7/00C09J123/08C09J131/04C09J11/06B29C48/92
CPCB29C48/08B29C48/875B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895B29C2948/92923
Inventor 文丽华马建华王志伟黄蕾蕾沈小民艳玲马磊陈秀群韦正军
Owner 杭州新子光电科技有限公司