PRESS-MOLDED CAN AND LID EXCELLENT IN SULFURIZATION DISCOLORING RESISTANCE AND CORROSION RESISTANCE

摘要

PROBLEM TO BE SOLVED: To provide a press-molded can not exposing a metal during processing, causing no blackening even against hydrogen sulfide, not causing the peeling of a resin coating or the occurrence of a crack after the filling with content and excellent in corrosion resistance or the preservation of content.;SOLUTION: In the press-molded can having a tin plating layer, a tin-zinc alloy layer, a non-chromium surface-treated layer and a thermoplastic resin layer formed thereto, the amount of Sn of the tin plating layer is 0.8 g/m² or above and the amount of Zn in the tin-zinc alloy layer is 0.06-0.5 g/m². The non-chromium surface-treated layer comprises at least one of a surface treatment layer based on a silane coupling agent, a surface treatment layer due to a water-soluble phenolic compound and an inorganic surface treatment layer containing Zr and/or Ti and the thermoplastic resin layer is formed of a polyester thermoplastic resin with a melting point of 200-235°C. The peel strength of the resin coating applied to the upper part of a can body after retort treatment is 100 g/15 mm width or above.;COPYRIGHT: (C)2006,JPO&NCIPI