| abstract |
Provided is a wound covering material produced by applying an aqueous solution containing a polyvinyl alcohol with a degree of hydrolysis not less than 95 mol. % and a viscosity-average degree of polymerization not less than 1,500, a water-soluble C2-20 polyhydric alcohol having 2-8 hydroxyl groups in the molecule and a high-viscosity water-soluble macromolecular substance being different from polyvinyl alcohol with a viscosity of the 2% aqueous solution of 25 DEG C. not less than 300 cP, concentrations of said polyvinyl alcohol, said water-soluble polyhydric alcohol and said water-soluble macromolecular substance being adjusted respectively to 1.5-8% by weight, 10-85% by weight and 0.2-15% by weight, onto a flat or curved plate having 30,000-200,000 projections per m2, the total area occupied by the projections being 10-70% to a thickness from 0.5 to 5 mm, cooling the applied plate to a temperature not higher than -6 DEG C. to solidify the solution and then subjecting the resulting mass to vacuum dehydration to a ratio of dehydration from 5% by weight to 95% by weight. |