Novel lithium ion battery aluminum plastic soft packaging film
A flexible packaging film, aluminum-plastic technology, applied in the direction of secondary batteries, battery pack parts, circuits, etc., can solve the problems that the heat-resistant resin layer cannot be directly applied, the molecular weight is low, and the coating cannot meet the stamping and forming requirements, etc., and achieve good Chemical resistance, simple preparation process, and the effect of preventing embrittlement of aluminum foil
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[0039] Preparation method of polyurethane acrylic UV curing coating;
[0040] According to the formula, the polyurethane acrylic prepolymer, the active monomer, the photoinitiator, and the auxiliary agent are added into the reactor and stirred uniformly to prepare the polyurethane acrylic ultraviolet curing coating.
[0041] Preparation method of aluminum-plastic flexible packaging film
[0042] The prepared polyurethane acrylic UV-curable coating is coated on the matte surface of the aluminum foil layer by conventional methods such as knife coating or spraying, and the coating is cured by UV light; then the passivation film layer of the aluminum foil and the thermoplastic resin layer are glued The adhesive is dry compounded to obtain an aluminum-plastic flexible packaging film for lithium ion batteries.
Example Embodiment
[0044] Example 1
[0045] The components of polyurethane acrylic UV-curable coatings are:
[0046]
[0047] Preparation of aluminum-plastic flexible packaging film:
[0048] Coat the above-mentioned urethane acrylic UV-curable coating of 100μm on the 35μm aluminum foil (matt surface), and after irradiating and curing under 1000W mercury arc etc., the 100μm single-layer cast polypropylene is dry laminated with adhesive On the surface of the organic passivation film (with a thickness of 1 μm) of the aluminum foil, an aluminum-plastic flexible packaging film for lithium ion batteries is obtained.
Example Embodiment
[0049] Example 2
[0050] The components of polyurethane acrylic UV-curable coatings are:
[0051]
[0052] Preparation of aluminum-plastic flexible packaging film:
[0053] Coat a 55μm aluminum foil (matte surface) with the above-mentioned urethane acrylic UV-curable coating of 80μm, irradiate and cure it under a 1000W mercury arc, etc., then dry the 60μm three-layer co-extruded cast polypropylene through an adhesive The method is compounded on the surface of the inorganic passivation film (with a thickness of 1 μm) of the aluminum foil to obtain the aluminum-plastic flexible packaging film for lithium ion batteries.
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