Patent ID: 8394404

Claim:
An adhesive material comprising a support and an adhesive layer laminated on one surface of the support, wherein the adhesive layer has an apparent viscosity at 30° C. of 0.2×10 4 to 10×10 4 Pa·s and comprises (i) first and second synthetic rubbers, (ii) a tackifier, and (iii) an organic liquid compatible with the first and second synthetic rubbers and the tackifier, wherein the first synthetic rubber is a branched aliphatic hydrocarbon having a Staudinger Index of 170-300 cm 3 /g, and the second synthetic rubber is a branched aliphatic hydrocarbon having a Staudinger Index of 30-60 cm 3 /g, wherein the first synthetic rubber, the second synthetic rubber, and the tackifier are present in a ratio of 10:12-20:2-6 or 10:12-20:7-11 by weight, wherein the proportion of the second synthetic rubber relative to the whole weight of the adhesive layer is 30-80%, and wherein the organic liquid is selected from higher alcohols, oils and fats, organic solvents, plasticizers, liquid surfactants, hydrocarbons, ethoxylated stearyl alcohol, glycerine fatty acid ester fatty acid ester N-methylpyrrolidone, oleic acid, 1,1-butanediol, and combinations thereof.