Molding Process
4 조회수
High Haze of LDPE Film
문제 현상
LDPE film has poor transparency and is hazy.
원인 분석
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.
해결 방법
①Raise melt temperature; ②air ring quenching to reduce surface crystallization; ③avoid melt fracture (raise die temperature); ④select high-transparency grades.
핵심 요약
Haze is divided into internal and external: adjust crystallization internally and surface externally.
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