Production & Quality
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PEI Chlorinated Solvent Corrosion
Problem Phenomenon
After PEI products contact chlorinated polar solvents, surface erosion and stress cracking occur; failures happen in medical cleaning scenarios.
Cause Analysis
PEI is easily corroded by polar chlorinated solvents; certain solvent erosion in hospital environments manifests as environmental stress cracking; areas with high internal stress crack faster; chemical resistance has clear boundaries.
Solution
①Avoid contact with chlorinated polar solvents; ②perform compatibility verification according to the actual contact medium; ③low-stress molding; ④select compatible disinfectants for medical cleaning.; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
The chlorinated solvent taboo of PEI chemical resistance is a clear knowledge point; solvent management in medical scenarios is a quality link; compatibility verification cannot be omitted.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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