Material Analysis
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Long-term yellowing of photovoltaic backsheets
Problem Phenomenon
The backsheet shows yellowing after long-term thermal aging
Cause Analysis
Solvent residue, oxidation of low molecular substances, and insufficient UV stabilizer
Solution
Select high-purity PVDF and add UV-326 and HALS
Key Takeaway
Photovoltaic backsheets rely on high purity and stabilizers
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