Injection Molding
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Insufficient strength of PBT injection molded parts (unreinforced)
Problem Phenomenon
Pure PBT injection molded products easily break when stressed, and the strength does not meet the requirements.
Cause Analysis
Pure PBT resin itself has limited strength and modulus (tensile strength about 55MPa), no reinforcing materials such as glass fiber are added, and there is internal stress.
Solution
Switch to glass fiber reinforced grades (30%GF tensile strength can reach more than 130MPa); optimize the molding parameters to reduce internal stress.
Key Takeaway
PBT engineering applications usually require glass fiber reinforcement to meet strength requirements.
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