Material Drying
3 조회수
Hydrolysis Bubbles and Silver Streaks in PC Products
문제 현상
Bubbles and silver streaks appear on the surface and inside of PC transparent products.
원인 분석
PC is extremely sensitive to moisture; hydrolysis occurs when moisture >0.02%; at a processing temperature of 270-320°C, water molecules attack the carbonate bonds to produce CO₂, forming bubbles and silver streaks.
해결 방법
Strict drying: 120°C/4-6h, dew point ≤-35°C, moisture <0.02%; use a dehumidifying dryer, and convey sealed after drying.
핵심 요약
PC drying is the first decisive factor for processing success or failure.
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