Molding Process
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White Marks Appearing on PBT Parts After Solvent Wiping
Fenómeno do problema
White marks appear on PBT products after wiping with alcohol, etc.
Análise das causas
The solvent slightly erodes the PBT surface, producing surface roughening or precipitation of low-molecular substances, showing white.
Solução
Avoid wiping with solvents; use a neutral cleaning agent; anneal the product to reduce stress.
Conclusão principal
White marks from solvent wiping of PBT are a manifestation of surface sensitivity.
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