Extrusion & Post
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Post-shrinkage of PCTG products
Problem Phenomenon
Products continue to shrink and change dimensions within 24-48h after demolding.
Cause Analysis
Post-shrinkage of non-equilibrium molecular chains, insufficient annealing.
Solution
Demold after full cooling; timely annealing to release stress.
Key Takeaway
PCTG post-shrinkage affects immediate packaging.
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