Material Analysis
12 görüntüleme
EVA heat-sensitive decomposition and yellowing
Sorun Belirtisi
EVA processing >200°C turns yellow and brown, releasing acetic acid odor
Neden Analizi
VA groups decompose by deacetylation at high temperature >200°C; acetic acid release accelerates decomposition
Çözüm
1) Temperature 140-200°C; 2) Shorten high-temperature residence and increase rotation speed; 3) 0.2wt% zinc stearate to absorb acetic acid; 4) Low-VA EVA with VA<18%
Temel Çıkarım
EVA heat-sensitive decomposition is caused by VA deacetylation; temperature control is the fundamental countermeasure
Bu faydalı oldu mu?
0 kişi bunu faydalı buldu
Geri bildiriminiz için teşekkürler!