How to produce high quality aluminum-plastic composite film for soft-package lithium battery

Through years of repeated experiments and groping, Guangzhou POTOP has finally developed a complete set of aluminum-plastic composite film extrusion process.

Some problems exist in aluminum plastic film:

1. Aluminum foil surface treatment process is backward: due to the use of washing oil removal and "chromic anhydride" passivation treatment, environmental protection problems are prominent.In addition, due to the surface tension of water, the oil in the aluminum foil micropore can not be cleaned, resulting in the subsequent process defects;

2. The water treatment process of aluminum foil will produce "hydrogen embrittlement", so the folding resistance of aluminum plastic film is poor;

3. Aluminum foil surface is coated with UV layer, so that aluminum foil stiffness is not enough, wide products can not be made and the rate of good products is poor;

4. For CPP, it is easy to produce crimp and lamellar crystallization when it is coated with high thermal conductivity aluminum foil;

5. The problem of adhesive formulation leads to the easy delamination of products.


Through years of repeated experiments and groping, Guangzhou POTOP has finally developed a complete set of aluminum-plastic composite film extrusion process.

POTOP mainly solve the following problems:

1. Screw optimization design

2. The crystal point is solved

3. Wrinkling problem in Aluminum foil Composites

4. Roller multi-axis synchronization technology

5. On-line high temperature lamination

6. Winding tension control


The following points should be noted in the aluminum plastic composite film:

1. Thickness selection of Aluminum foil

2. Surface treatment of Aluminum foil

3. Preheating of aluminum foil

4. Thickness uniformity of Extrusion layer

5. Crystal Point Control of Extrusion layer

6. Arrangement of rollers

7. Rolls temperature setting

8. Rolls pressure setting

9. Cooling of aluminium-plastic composite film

10. Neat winding


A customer has used the aluminum plastic composite film production line developed by Guangzhou POTOP, to realize the batch production of aluminum plastic film. This product is excellent in electrolyte resistance and strong acid corrosion, deep impact strength, etc. This customer has won the majority of users praise, and realize huge benefits.

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