Injection Molding
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Stress Cracking of PCTG Injection Molded Products
Problembeschreibung
Cracks appear in PCTG products during use or when contacting chemicals.
Ursachenanalyse
Excessively fast molding cooling produces internal stress, the product design has stress concentration, and PCTG is sensitive to stress cracking by certain solvents.
Lösung
Increase the mold temperature to 30-50°C; avoid sharp corners and abrupt wall thickness changes in product design; anneal at 60-70°C/2-4h after molding.
Wichtigste Erkenntnis
PCTG stress management is the guarantee of long-term use reliability.
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