Material Drying
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PPO Washing Machine Parts
Problem Phenomenon
[Problem Phenomenon] Washing machine control bases and water inlet parts have moisture resistance and heat resistance requirements
Cause Analysis
PPE/HIPS washing machine part applications are mature: low water absorption ensures wet-state dimensions and electrical properties; control parts utilize its insulation and dimensional stability; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Select the PPO series for washing machine wet-zone parts; select flame-retardant grades for electrical parts; verify long-term hot water cycling; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
For washing machine wet-zone electrical parts, PPO's low water absorption preserves insulation; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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