| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a three-piece resealing can for acidic beverages formed by laminating a polyester film to a Sn plated steel sheet and improved in a corrosion resistance by securing adhesion. <P>SOLUTION: The three-piece resealing can for acidic beverages is provided with a can barrel part applied with threading on a plated steel sheet with a PET resin film laminated thereon, which is formed by previously coating and drying an adhesive agent layer at least on a surface corresponding to an inner surface of the can. The plated steel sheet is formed by applying Sn plating of 800 to 1,500 mg/m<SP POS="POST">2</SP>on a surface of the steel sheet, a part of the Sn plating layer is alloyed by a treatment of melting tin, a Sn plating layer having projection parts is formed, and a chromate coating film of 2 to 30 mg/m<SP POS="POST">2</SP>in terms of metal Cr is further formed on an upper layer thereof. In the surface roughness of the plated steel sheet, an arithmetical mean roughnesses Ra in the C direction are 0.30 to 0.45 μm and the number Pc of peaks of roughness with a height of 0.25 μm or more in the C direction is 50-230 pieces/cm. <P>COPYRIGHT: (C)2013,JPO&INPIT |
