LLDPE '2079851475616104452 sink marks

Fenómeno do problema

Thick-wall depressions.

Análise das causas

Large shrinkage + insufficient compensation feeding.

Solução

①Increase holding pressure; ②reduce material in thick walls; ③large gate; ④extend holding pressure.

Conclusão principal

Sink mark = compensation feeding.

LLDPE; '2079851475616104452; sink mark; holding pressure; thick wall

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