Injection Molding
10 görüntüleme
Long glass fiber poor impregnation causing dispersion difficulty
Sorun Belirtisi
During pelletizing or injection, glass fiber bundles cannot be fully impregnated and dispersed by the PP melt
Neden Analizi
The melt viscosity of PP is high, making it difficult to penetrate into the fiber bundle; the polarity difference between the fiber surface and PP is large, with a wetting angle >90°; the processing time is insufficient to complete impregnation
Çözüm
Increase the processing temperature to reduce PP viscosity; pre-impregnate the glass fiber (use low molecular weight PP impregnating agent); optimize the screw design by adding an impregnation section
Temel Çıkarım
Full impregnation of fibers is the prerequisite for exerting the reinforcement effect
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