| 摘要 |
<p>PROBLEM TO BE SOLVED: To enhance ESCR and chemical resistance without damaging the rigidity and moldability of a rotary molding container by specifying the respective physical properties of innermost and outermost layer components comprising an ethylene/α-olefin copolymer. SOLUTION: A rotary molding container consists of an innermost layer component A and an outermost layer component B. The component A is an ethylene/3-18cα-olefin copolymer and characterized by that an MRF under load of 2.16 kg at 190 deg.C is 1-50 g/10 min, density is 0.87-0.93 g/cm<3> , a wt. average mol. wt./number average mol. wt. ratio measured by a GPC method is 3, 3 or less, the extrapolation melting completion temp. (Tem) of a melting peak obtained by DSC is 60-130 deg.C and there is a relation of Tem<=286D137 between Tem and density D. The component B is an ethylene homopolymer or an ethylene/3-10Cα-olefin copolymer and has an MRF 2-30 g/10 min at 190 deg.C under load of 2.16 kg and a density of 0.92 0.96 g/cm<3> .</p> |
