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A wet manufacturing process of lithium battery flexible packaging film
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A flexible packaging film and production process technology, which is applied in the field of wet production process of lithium battery soft packaging film, can solve the problems of weak electrolyte corrosion resistance, low production efficiency, poor electrolyte resistance performance, etc., to improve production rate and Effect of Electrolyte Resistance
Active Publication Date: 2021-08-27
SHANGHAI ZIJIANG NEW MATERIAL TECH CO LTD +1
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[0003] When the current thermal process has aluminum foil and polypropylene layer extrusion composite production speed is low, the corrosion resistance of electrolyte is not strong, resulting in low production efficiency and poor electrolyte resistance
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[0041] The unwinding roller 1 passes through the glue tank 2 after unwinding, and the coating amount of the adhesive coated on the surface of the aluminum foil is 2g / m 2 , and then carry out drying treatment in the drying box 3, and the drying temperature is 180°C.
[0042] 5. Extrusion compounding of aluminum foil and polypropylene film layer:
[0055] The unwinding roller 1 passes through the glue tank 2 after unwinding, and the coating amount of the adhesive coated on the surface of the aluminum foil is 2g / m2, and then it is dried in the drying oven 3, and the drying temperature is 180°C.
[0056] 5. Extrusion compounding of aluminum foil and polypropylene film layer:
[0057] The polypropylene film layer is made of block co...
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Abstract
The invention discloses a wet manufacturing process of lithium battery flexible packaging film, which includes the following steps: (1) degreasing and corrosion-resistant treatment are performed on the rough surface and the smooth surface of aluminum foil; (2) the corona surface of the nylon layer and the treated (3) pre-coating the smooth surface of the aluminum foil with an adhesive, and then thermally bonding the polypropylene film layer and the aluminum foil by extrusion compounding and cooling and forming; (4) The lithium battery flexible packaging film is cooled and rolled after the secondary heat treatment is formed. The wet manufacturing process of the lithium battery flexible packaging film of the present invention can improve the production rate and electrolyte resistance performance of the aluminum-plastic composite film.
Description
technical field [0001] The invention relates to the field of production of flexible packaging films for lithium batteries, in particular to a wet manufacturing process for flexible packaging films for lithium batteries. Background technique [0002] The aluminum-plastic composite film for lithium battery packaging is mainly composed of three layers of materials, the outer layer of nylon (ONPA), the middle layer of aluminum foil (AL) and the inner layer of polypropylene film (CPP). There are two main processes at present, one A kind of dry compounding, which is made by directly pressing three layers of materials with adhesives such as polyurethane, acrylic acid, epoxy resin, maleic anhydridepolypropylene, etc., by dry compounding. The other is thermal compounding, which uses the outer layer of nylon (BOPA) and the middle layer of aluminum foil (AL) to dry compound with an adhesive, and the middle layer of aluminum foil (AL) and the inner layer of polypropylene (CPP) are melt...
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