Molding Process
4 조회수
Impact strength of PBT products decreases at low temperature
문제 현상
The impact strength of PBT products decreases significantly at low temperatures of -30°C to -40°C, becoming brittle.
원인 분석
The glass transition temperature of PBT is about 45-60°C; at low temperatures, the movement of molecular chain segments is severely restricted and the toughness decreases significantly.
해결 방법
Use toughened modified PBT grades (PBT/elastomer blends); avoid sharp corners and notches in product design; consider the safety factor for low-temperature applications.
핵심 요약
PBT low-temperature brittleness is a key consideration for automotive parts.
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