Metal band having metallic appearance excellent in forming stability and seamlessly formed can body and method for production thereof

A metal strip with metallic-appearance excellent in forming stability, having a single coated film layer on the side thereof corresponding to an external side of a can, the metal strip comprising:

• a filler-rich portion containing not less than approximately 20 mass %, in the coated and dried state, of a filler of at least one of aluminum or aluminum alloys;
• and
• a resin-rich portion containing not more than approximately 5 mass % of said filler and approximately 0.3 to 10 μm in thickness provided upon the filler-rich portion,
• wherein the filler-rich portion is dilutely distributed in the direction of thickness of the coated film layer.

A method for manufacturing a seamlessly-formed can body, by comprising:

• applying multistage ironing to a metal strip with a thickness reduction ratio γ by using two or more dies such that a Total thickness reduction ratio γ<58+11d0.35 (wherein d is a thickness (μm) of the resin-rich portion containing at most approximately 5 mass % of filler in a coated surface at distance from a coated side),
• wherein the metal strip has a single coated film layer on the side thereof corresponding to an external side of a can, the metal strip comprising:
• a filler-rich portion containing not less than approximately 20 mass %m, in the coated and dried state, of a filler of at least one of aluminum or aluminum alloys, and
• a resin-rich portion containing not more than approximately 5 mass % of said filler and approximately 0.1 to 20 μm in thickness provided upon the filler-rich portion, and
• wherein the filler-rich portion is dilutely distributed in the direction of thickness of the coated film layer.

A method for manufacturing a seamlessly-formed can body, comprising:

• applying multistage ironing to a metal strip with a thickness reduction ratio γ by using two or more dies such that a Total thickness reduction ratio γ<58+11d0.35 (wherein d is a thickness (μm) of the resin-rich portion containing at most approximately 5 mass % of filler in the a coated surface at distance from a coated side),
• wherein the metal strip has a single coated film layer on the side thereof corresponding to an external side of a can, the metal strip comprising:
• a filler-rich portion containing not less than approximately 20 mass %, in the coated and dried state, of a filler of at least one of aluminum or aluminum alloys, and
• a resin-rich portion containing not more than approximately 5 mass % of said filler and approximately 0.3 to 10 μm in thickness provided upon the filler-rich portion, and
• wherein the filler-rich portion is dilutely distributed in the direction of thickness of the coated film layer.