Material Drying
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PPS Electrical Connectors
Problem Phenomenon
PPS connectors blister and deform after reflow soldering, or terminal coplanarity is out of tolerance
Cause Analysis
PPS is heat-resistant and can pass reflow soldering, but surface moisture on pellets vaporizes and causes blistering; glass fiber orientation warpage affects coplanarity; thin-wall multi-cavity requires high-flow grades in coordination; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based on experience alone
Solution
①Fully dry before reflow soldering; ②Low-warpage grades ensure coplanarity; ③Select high-flow grades for thin-wall connectors; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PPS is the standard material for reflow-soldered connectors; drying and low-warpage grades are double insurance for coplanarity; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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