| 摘要 |
PROBLEM TO BE SOLVED: To provide a biaxially stretched sheet unaccompanied by thickness irregularities and to provide, by using the biaxially stretched sheet, a container excellent in terms of appearance and buckling strength.SOLUTION: The provided biaxially stretched sheet is obtained by molding, as a sheet, a styrenic resin composition including an ultrahigh-molecular-weight branched copolymer and a linear polymer, whereas, in a case where elongation viscosities specific respectively to Hencky strains of 2.5 and 0.5 when the styrenic resin composition abides at 130°C are defined as &eegr;2.5 and &eegr;0.5, the monoaxial elongation viscosity ratio expressed by &eegr;2.5/&eegr;0.5 is 19-28. |
