Molding Process
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Color migration of PCTG colored products
Problem Phenomenon
Product color migrates to contacting objects causing contamination.
Cause Analysis
The dyes or pigments used have poor migration resistance; low molecular substances carry color.
Solution
Select migration-resistant pigments; increase processing temperature to fix pigments; surface sealing coating.
Key Takeaway
PCTG color migration is related to colorant quality.
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