Molding Process
6 مشاهدة
High Haze of LDPE Film
ظاهرة المشكلة
LDPE film has poor transparency and is hazy.
تحليل الأسباب
Internal haze comes from large crystallite size, external haze comes from surface roughness (melt fracture/uneven cooling); low melt temperature and slow air ring cooling both increase haze.
الحل
①Raise melt temperature; ②air ring quenching to reduce surface crystallization; ③avoid melt fracture (raise die temperature); ④select high-transparency grades.
الخلاصة الأساسية
Haze is divided into internal and external: adjust crystallization internally and surface externally.
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