Idemitsu Petrochemical Co., Ltd.

Showa Aluminim Corporation

Isamu Yamamoto

Hideo Funabashi

Eiji Tamura

Kenji Nakacho

Hideo Kawai

Tsutomu Akimaru

Hiroshi Hasunuma

Norio Shimakura

Tsuyoshi Ohta

A process for the preparation of an ethylenic polymer composition having excellent physical properties such as high impact properties, environmental stress cracking resistance, pinch-off fusing characteristics and having an intrinsic viscosity ranging from 3.2 to 4.5 dl/g and a density ranging from 0.943 g/cm.sup.3 to 0.958 g/cm.sup.3.

Process for preparing ethylenic polymer composition

A food packaging container having a flanged container body of a laminate sheet which comprises a layer of aluminum foil and at leasat one thermoplastic resin layer joined to one surface of the foil layer. The container body is prepared by deep-drawing the laminate sheet with the resin layer inside. The aluminum foil is 40-200 .mu.m in thickness, 9.0-25.0 kgf/mm.sup.2 in tensile strength, 2.5-9.5 kgf/mm.sup.2 in proof stress, 10 to 40% in elongation and up to 7% in earing ratio. The resin layer comprises a thermoplastic resin 100-500 .mu.m in thicknes, 0.92-1.08 in the ratio of modulus of elasticity in tension in the machine directon (MD) to that in the transverse direction (TD), 0.60-1.40 in the MD/TD ratio of elongation and 0.40-1.60 in the MD/TD ratio of breaking strength.

Food packaging container

Growing community of inventors

Sakai, Japan

Isamu Yamamoto