Thermoforming
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Poor adhesion of electroplating/spray coating on polystyrene products
Problem Phenomenon
After electroplating or spray coating, the coating adhesion is poor, and blistering or peeling easily occurs.
Cause Analysis
(1) Product surface tension is insufficient, and the coating is difficult to adhere
(2) The product surface has release agent or oil stain residues
(3) Product internal stress is large, affecting coating adhesion
(4) Pretreatment before electroplating/spray coating is insufficient
(5) The coating material does not match the substrate
Solution
(1) Perform corona or flame treatment on the product surface
(2) Ensure the product surface is clean and free of release agent
(3) Reduce product internal stress (annealing treatment)
(4) Strengthen pretreatment (degreasing, roughening, etc.)
(5) Select matching coating materials
Key Takeaway
Electroplating and spray coating adhesion is determined by surface energy and surface condition.
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