Extrusion & Post
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PMMA Extrusion Temperature 180-250℃
Fenómeno do problema
Extruded sheets have many surface defects, and molecular weight distribution changes cause performance fluctuations
Análise das causas
PMMA extrusion temperature 180-250℃; sheet and profile formulations use higher molecular weight grades; a 3:1 compression ratio metering screw is recommended, and a vented screw with L/D ratio 20-30 is best
Solução
①Extrusion temperature 180-250℃ adjusted by grade; ②select a 3:1 compression ratio metering screw; ③high-requirement lines use L/D 20-30 vented screws
Conclusão principal
PMMA extrusion equipment selection has clear specifications; screw parameter matching is the hardware basis for stable sheet quality; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.
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