Extrusion & Post
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Color change of PCTG products after heat treatment
Problem Phenomenon
Color changes after post-molding annealing or heat treatment.
Cause Analysis
Improper heat treatment temperature or time causes thermal oxidation, insufficient protective atmosphere.
Solution
Control heat treatment temperature and time; nitrogen-protected annealing; reduce treatment temperature.
Key Takeaway
PCTG heat treatment requires oxidation control.
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