Material Analysis
12 조회수
PBT Floating Fiber Causes
문제 현상
The surface of glass fiber reinforced PBT products has floating fibers and is rough, and the fiber texture appears after painting
원인 분석
PBT has poor compatibility with glass fiber and insufficient bonding; the large viscosity difference between the two causes separation during flow; shear force destroys the interface layer on the glass fiber surface, and the lower the viscosity, the easier the glass fibers break free from restraint and accumulate toward the surface
해결 방법
①Increase injection temperature and mold temperature, increase injection pressure and back pressure; ②Speed up injection speed and reduce screw rotation speed; ③Add compatibilizer on the material side to improve bonding; after adjustment, take samples continuously to verify the effect, and resume mass production only after confirming stability
핵심 요약
Floating fiber is the superposition of three factors: compatibility, viscosity difference, and shear; combining process adjustment with compatibilizer works best; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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