Extrusion & Post
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PESU UV Resistance Shortcoming and Protection
Problem Phenomenon
【Problem Phenomenon】PESU outdoor parts show surface aging and loss of gloss after use, with performance degradation
Cause Analysis
PESU has poor weather resistance and is not UV-resistant, outdoor use requires anti-UV modification or coating protection; the transparent amber color also changes under UV; when troubleshooting on site, verify item by item according to this mechanism, avoiding blind machine adjustment based only on experience
Solution
Choose anti-UV modified grades or surface coating protection for outdoor parts; avoid direct sunlight storage; perform xenon lamp aging verification for outdoor applications; after adjustment, continuously sample to verify the effect, confirm stability before resuming mass production
Key Takeaway
PESU's fear of UV is its nature, for outdoor applications choose either modification or coating; after confirming effectiveness, fix 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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