prevent plastic coating peeling

prevent plastic coating peeling

1. Causes of coating peeling

Sliver marks on products
Poor coating and improper coating method
2. Related knowledge
Due to the lack of demoulding slope, the demoulding agent is used, so the coating peeling defects are very common, and a large amount of demoulding agent containing silicone oil remains on the products, resulting in very bad results.
3. Solutions
Instant; inspection of coating, standardization of coating operation, cleaning of release agent
Short term; remove sliver marks from product.
Long term; increase release agent.
4. Due to material differences
Generally speaking, PS, PP, POM, etc. do not carry out coating work, PP, etc. can carry out coating work after pre-treatment.
PS, especially GPPS, is prone to network silicon cracking due to the solvent. The other way is to set the forming conditions in the direction of no residual stress on the products.