HP-Polymer can be dissolved in water easily compared with those of conventional PVOH. The dissolution temperature can be lowered 10 in general and dissolution time can be shortened The problem about undissolved PVOH residual can be also solved. HP-Polymer provides both good solubility and good mechanical property of the film together. �@

Ratio of undissolved PVOH at each temperature

Temperature () Time (min) Ratio of undissolved PVOH(%) HP-F117 PVA-117 75 30 0.024 0.897 80 30 0.006 0.066 85 30 undetected 0.010 Concentration=10%, Agitation speed = 300 rpm PVOH is charged into the water at 30(86), heated up to the each kept for 30min and then undissolved PVOH residual are filtered.