Patent ID: 8877308

Claim:
A package for boil sterilization or retort sterilization to be used as a multilayer package, comprising a multilayer laminate body having a base layer and a sealant layer, wherein the value of the tear strength of the multilayer laminate body measured according to JIS K7128-2 is such that (TD value)/(MD value)=1.5-10, and wherein the value of the tear strength of the film used in the sealant layer is such that (TD value)/(MD value)=3-10, and wherein the sealant layer is formed of an ethylene-propylene block copolymer-based resin which comprises a laminate layer, an interlayer, and a seal layer, wherein the resin film is stretched by uniaxial stretching to a factor in the range of 1.25-5, and wherein the interlayer consists of a blend of 60-95 wt % of ethylene-propylene block copolymer and 5-40 wt % of at least one rubber component selected from an ethylene-propylene rubber and a styrene-ethylene-based elastomer.