Patent ID: 8563799

Claim:
A wound-covering hydrogel material which is prepared by spreading a hydrogel comprising 5-15% by weight of a water-soluble synthetic or semi-synthetic polymer selected from combinations of two or more of carboxyvinyl polymers, polyacrylic acid, partially neutralized polyacrylate and carmellose sodium, 15-30% by weight of glycerol, 40-75% by weight of water and 0.001-1% by weight of one or more crosslinking agents selected from the group consisting of dried aluminum hydroxide gel, aluminum glycinate, dihydroxyaluminum aminoacetate, synthetic hydrotalcite, and metal salt aluminometasilicates on a laminated two-layer film composed of a polyurethane film and hydrophobic fibers; wherein the wound-covering hydrogel material has a moisture permeability of 500-2,000 (g/m 2 /24 h) as measured by a cup method in accordance with JIS Z 0208; and the wound-covering hydrogel material has a tackiness of 8-12 as expressed in terms of ball number before absorption of water and a tackiness of not higher than 3 as expressed in terms of ball number after 8-hours of water absorption.