Molding Process
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PPO/PA Alloy Chemical Resistance Application
Problem Phenomenon
【Problem Phenomenon】PPO dimensional stability is needed together with oil and chemical resistance, which a single material can hardly achieve
Cause Analysis
PPO/PA alloy (NORYL GTX) combines PPO dimensional stability with PA chemical resistance and heat resistance, and its semi-crystalline structure has good solvent resistance; suitable for automotive under-hood and fluid contact parts
Solution
Select PPO/PA alloy for oil and chemical resistance occasions; check chemical resistance grade according to PA content; design welding and assembly according to PA phase characteristics; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
PPO/PA alloy is the chemical-resistant version of PPO, the mainstay of automotive fluid parts; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems
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