Production & Quality
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Glass Fibre product yellowing after processing
Problembeschreibung
Glass Fibre product after 1 week storage surface gradually yellows, color difference ΔE>3
Ursachenanalyse
Antioxidant system incomplete, thermal oxidative degradation produces yellow products; ultraviolet irradiation accelerates photo-oxidation; residual transition metal catalyst catalyzes oxidation
Lösung
1) Improve antioxidant system 1010(0.1)+168(0.1)+DSTDP(0.2)wt%; 2) add UV absorber 0.2-0.5wt%; 3) add metal deactivator 0.05wt%; 4) select low-residue raw material grade
Wichtigste Erkenntnis
Yellowing is caused by thermal-photo oxidation and metal catalysis; improving antioxidant system and UV absorber is key
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