Processing Machinery
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HDPE film gel particles - crosslinked type
Fenómeno do problema
Arrow-shaped and V-shaped crosslinked gel spots appear on the film surface.
Análise das causas
The material is retained and crosslinked in the barrel/head (oxidative gel); formed by heat preservation during shutdown or retention in dead corners.
Solução
①Shorten residence time and standardize shutdown; ②clean dead corners; ③fully purge at startup; ④add antioxidant for evaluation if necessary.
Conclusão principal
Crosslinked gel particles = retention oxidation; manage shutdown and dead corners well.
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