Polyvinyl Alcohol is a kind of non-ionic linear high polymer. It is non-toxic, non-smelly, it looks white or light yellow, LOW ALKALI PVAITEMhydrolysis,% ≥viscosity,mPa·sSodiumacetate,% ≤volatile,% ≤ash,% ≤purity,%≥17-99(L)99.522~312.17.00.890.018—99(L)99.232~402.17.00.8—20-99(L)99.246~502.17.00.8—22-99(L)99.251~562.17.00.8—24—99(L)≥99.2>562.17.00.8—17—8886.0~89.020.5~24.51.05.00.7— PVA 17-88,17- ...