Processing Machinery
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PVC Profile Weathering Chalking
Problem Phenomenon
Outdoor profiles after a period of use show surface chalking and discoloration, strength declines.
Cause Analysis
PVC weather resistance depends on formula (titanium dioxide, anti-UV agent); insufficient formula weather resistance or processing degradation reduces weather resistance; UV and thermo-oxidation act together; during on-site troubleshooting, verify item by item according to this mechanism, avoid blindly adjusting the machine based solely on experience.
Solution
①Outdoor formula with sufficient titanium dioxide and anti-UV system; ②Prevent processing degradation; ③Weather resistance test verification; ④Surface co-extrusion protective layer; ⑤Control use environment.
Key Takeaway
PVC weather resistance = 'formula system + processing protection': outdoor material needs sufficient titanium dioxide and anti-UV; processing degradation prematurely overdraws weather resistance — formula and process must coordinate.
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