Aluminum-plastic composite film

1. CPP - Laminated Polypropylene. The innermost layer, directly in contact with the internal part of the battery cell and the electrolyte. Function: Heat sealing layer.

2. 2.SFL - Special Function Layer. Located between CPP and AL. Function: Bonding and protective layer.

3. AL - Aluminum Foil. Middle layer. Isolates water and oxygen.

4. 4.PA - Nylon. Can absorb a small amount of environmental moisture, reducing the pressure on the inner barrier layer.

5. PET - Polyethylene Terephthalate. Outermost layer. Has excellent rigidity and dimensional stability, facilitating inkjet printing information.