Material Analysis
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PPS brittleness and toughening
Problem Phenomenon
Pure PPS products impact brittle fracture, snaps and thin-walled ribs break during assembly
Cause Analysis
Unmodified PPS is brittle with low impact strength, an inherent shortcoming of its molecular rigid structure; toughening modification uses flexible polymer blending such as PPA, balancing heat resistance and toughness
Solution
①Load-bearing and snap parts choose toughened modified grades; ②toughening system prefers PPA type rather than ordinary PA; ③structure avoids sharp-angle stress concentration; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Brittleness is the first shortcoming of pure PPS; toughening modification is the necessary path for application expansion, PPA system is the mainstream route; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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