Extrusion & Post
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PVDF Weather Resistance Application and Appearance Retention
Problem Phenomenon
【Problem phenomenon】Ordinary plastic outdoor parts age rapidly; after switching to PVDF, processing still needs to be controlled to ensure the weather resistance advantage
Cause Analysis
PVDF is inherently UV-resistant and weather-resistant with a 46% oxygen index and self-extinguishing, making it the preferred choice for outdoor coatings and membranes; but processing degradation consumes the weather resistance reserve, and yellowed parts show a synchronous decline in weather resistance
Solution
The prerequisite for realizing the weather resistance advantage is no overheating during processing: strictly control the melt temperature upper limit and residence time; perform xenon lamp aging verification for outdoor parts; control the yellowing grade for appearance parts; After adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PVDF weather resistance is a natural gift; overheated processing will prematurely overdraw this reserve; 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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