Injection Molding
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Glass Fiber Exposure (Floating Fiber) Appearing on the Surface of Glass Fiber Reinforced polyamide 66 (nylon 66) Products
Fenómeno do problema
Glass fiber exposure (floating fiber) appears on the surface of glass fiber reinforced polyamide 66 (nylon 66) products, and the surface is rough with silvery filaments
Análise das causas
The glass fiber length is too long or the content is too high
The injection speed is too low, and the glass fiber is exposed as it orients with the flow
The mold temperature is too low, and the glass fiber fuses poorly with the matrix
The barrel temperature is too low, the melt fluidity is insufficient, and the glass fiber is exposed
The interfacial bonding between the glass fiber and PA is not strong
Solução
Optimize the glass fiber length and content
Appropriately increase the injection speed to reduce glass fiber orientation
Increase the mold temperature to the higher value of 70-110°C to improve fusion
Increase the barrel temperature to the higher value of 260-300°C
Add a coupling agent to improve interfacial bonding
Conclusão principal
Floating fiber of glass fiber PA needs to be addressed from the injection speed and mold temperature
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