Molding Process
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Stress cracking of PAR products
Fenómeno del problema
Cracks appear in the product during use or when contacting chemicals.
Análisis de la causa
The molding cooling is fast and the internal stress is large; PAR has a stress cracking tendency to alkaline and polar solvents.
Solución
Raise the mold temperature to 120-160°C; fully anneal at 150-170°C/2-4h; avoid contact with sensitive chemicals.
Conclusión clave
PAR stress management is the foundation of high-reliability applications.
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