Material Drying
4 조회수
DSTDP processing moisture causing silver streaks
문제 현상
DSTDP injection molded product surface shows white silver streak marks
원인 분석
Raw material moisture >0.05% vaporizes during high-temperature processing forming bubbles that are stretched into silver streaks; insufficient drying or hopper condensed moisture
해결 방법
1) Dry raw material at 80°C for 3-4h to moisture <0.02%; 2) increase back pressure 0.5-1MPa for venting; 3) reduce injection speed to avoid air entrainment; 4) heat the hopper to prevent condensed moisture
핵심 요약
Silver streaks are caused by moisture vaporization and stretching; drying and venting are the main countermeasures
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