Molding Process
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White Marks Appearing on PBT Parts After Solvent Wiping
Problem Phenomenon
White marks appear on PBT products after wiping with alcohol, etc.
Cause Analysis
The solvent slightly erodes the PBT surface, producing surface roughening or precipitation of low-molecular substances, showing white.
Solution
Avoid wiping with solvents; use a neutral cleaning agent; anneal the product to reduce stress.
Key Takeaway
White marks from solvent wiping of PBT are a manifestation of surface sensitivity.
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