Material Drying
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Medium Matching in LCP Chemical Resistance Applications
Problem Phenomenon
【Problem Phenomenon】After LCP products contact certain chemicals, surface changes or performance decline occur
Cause Analysis
LCP resists hydrolysis, weak acids and alkalis, and most chemicals such as alcohols, aromatic hydrocarbons, chlorinated hydrocarbons, esters and ketones, but concentrated strong acids and alkalis and specific media can still attack it; the MEMS textbook gives a clear list of resistant media
Solution
Check the use environment against the MEMS resistant media list; for occasions contacting concentrated strong acids and alkalis, switch to other fluoromaterials; do medium immersion verification before finalizing material selection; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
LCP's chemical resistance spectrum is broad but has boundaries; immersion verification must be done first in strong acid and alkali occasions; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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