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AssigneesIdemitsu Petrochemical Co., Ltd., Showa Aluminim Corporation
InventorsEiji Tamura, Hideo Kawai, Isamu Yamamoto, Hiroshi Hasunuma
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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.
A food packaging container having a flanged container body of a laminate sheet comprising a layer of aluminum foil and at least one thermoplastic resin layer joined to one surface of the foil layer, the container body being prepared by deep-drawing the laminate sheet with the resin layer inside, the container being characterized in that the aluminum foil layer of the laminate sheet comprises an aluminum foil 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 thermoplastic resin layer of the sheet comprising a thermoplastic resin 100-500 .mu.m in thickness, 0.92-1.08 in the ratio of modulus of elasticity in tension in the machine direction (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.
Dependencies are inferred from the claim text.