Molding Process
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Poor adhesion of PET vacuum aluminized film
Problem Phenomenon
After vacuum aluminizing of PET film, the aluminum layer has poor adhesion and easily falls off or scratches.
Cause Analysis
Low surface energy of PET film (about 30-36mN/m), surface contamination (oil, dust), improper aluminizing process parameters.
Solution
Corona treat PET film to dyne value ≥42mN/m; ensure film surface cleanliness; optimize aluminizing parameters vacuum ≤5×10⁻⁴Pa.
Key Takeaway
PET aluminized film adhesion depends on surface treatment and coating process.
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