Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD FOR MANUFACTURING TWO-PIECE CAN, CAN DRUM, AND METAL SHEET
Document Type and Number:
WIPO Patent Application WO/2021/049029
Kind Code:
A1
Abstract:
In a can drum 11 of a two-piece can 1, a circular metal sheet 100 has: an Sn plating layer 120 ranging from 100 mg/m2 to 1500 mg/m2 inclusive, the Sn plating layer 120 being provided on a steel parent material 101; a Cr plating layer 130 ranging from 6 mg/m2 to 100 mg/m2 inclusive, the Cr plating layer 130 being provided on the Sn plating layer 120; and a coating layer 140 laminated on the Cr plating layer 130, the coating layer 140 being configured from a thermoplastic resin. The metal sheet 100 also has an Ni plating layer 110 between the parent material 101 and the Sn plating layer 120 and is not subjected to a heat treatment, or instead does not have the Ni plating layer 110 on the parent material 101 and is subjected to a heat treatment. The metal sheet 100 is molded into a cylindrical shape in which the coating layer 140 forms an inner layer. The relationship 35% ≤ ((Tb - Tw)/Tb) × 100 (%) ≤ 60% is satisfied, where Tw is the sheet thickness of a cylindrical wall section 22 of the can drum 11 at a site where the wall section 22 is thinnest, and Tb is the sheet thickness of a bottom section 21 of the can drum 11.

Inventors:
FUKUNAGA MINORU (JP)
NAKAMURA KOICHIRO (JP)
HIRANO SHIGERU (JP)
TANI YOSHIAKI (JP)
Application Number:
PCT/JP2019/036200
Publication Date:
March 18, 2021
Filing Date:
September 13, 2019
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
DAIWA CAN CO LTD (JP)
NIPPON STEEL CORP (JP)
International Classes:
B65D1/00; B21D51/26; B65D1/16
Foreign References:
JPH06218465A1994-08-09
JPH09241865A1997-09-16
JP2003231989A2003-08-19
JPH06226914A1994-08-16
JP2001262371A2001-09-26
Attorney, Agent or Firm:
KURATA, Masatoshi et al. (JP)
Download PDF: