Abstract: A resin-coated seamless aluminum can (10) having polyester resin coatings (5, 7) on the inner and outer surfaces thereof, the polyester resin coatings (5, 7) being formed on the inner and outer surfaces of an aluminum can body (1) via non-chromium inorganic surface-treating films (3, 3), the polyester resin coatings (3, 7) being formed of a lowly crystalline polyester to which have been introduced a copolymer unit stemming from a dibasic acid and a copolymer unit stemming from a polybasic acid having a valence of 3 or more.

Abstract: A resin-coated seamless aluminum can (10) having polyester resin coatings (5, 7) on the inner and outer surfaces thereof, the polyester resin coatings (5, 7) being formed on the inner and outer surfaces of an aluminum can body (1) via non-chromium inorganic surface-treating films (3, 3), the polyester resin coatings (3, 7) being formed of a lowly crystalline polyester to which have been introduced a copolymer unit stemming from a dibasic acid and a copolymer unit stemming from a polybasic acid having a valence of 3 or more.

Abstract: There is provided an alkaline cleaning of aluminum alloy, in which the attained corrosion resistance is equal or superior to the acidic cleaning agent, and which mitigates the disadvantages of the acidic cleaning agent, such as corrosion of plant, processing of the waste liquid, and energy cost, and which attains improved productivity. The cleaning liquid from 0.5 to 40 g/L in total of one or more alkali builders selected from alkali metal hydroxide, alkali metal carbonate, inorganic alkali metal phosphate and alkali metal silicate, from 0.2 to 10 g/L of one or more of organic phosphonic acid and its salt (A), from 0.001 to 2 g/L of one or more metallic ions (B) selected from metallic ions having from 5.0 to 14.0 of stability constant with the organic phosphonic acid and its salt, and from 0.1 to 10 g/L of surfactant. Particularly, the weight ratio of (A):(B) is in a range of from 100:0.05˜20.

Abstract: A resin-coated steel plate obtained by providing, on at least one surface of the steel plate, (i-1) an alloy layer of iron and at least one metal selected from tin, zinc and nickel or (i-2) a tin-plated layer containing tin in an amount of not smaller than 0.5 g/m2, (ii) a silane coupling agent-treated layer, and (iii) a thermoplastic polyester resin layer in this order from the side of the steel plate. Despite not containing chromium, the resin-coated steel plate exhibits excellent work adhesion properties between the steel blank and the organic resin film even when the thickness is reduced due to a severe working and even at portions subjected to severe working such as flanging and necking. By press-forming the resin-coated steel plate, there are obtained cans featuring excellent corrosion resistance and being adapted to containing even highly corrosive contents.

Abstract: [Problems] There is provided an alkaline cleaning of aluminum alloy, in which the attained corrosion resistance is equal or superior to the acidic cleaning agent, and which mitigates the disadvantages of the acidic cleaning agent, such as corrosion of plant, processing of the waste liquid, and energy cost, and which attains improved productivity. [Means for Solution] The cleaning liquid from 0.5 to 40 g/L in total of one or more alkali builders selected from alkali metal hydroxide, alkali metal carbonate, inorganic alkali metal phosphate and alkali metal silicate, from 0.2 to 10 g/L of one or more of organic phosphonic acid and its salt (A), from 0.001 to 2 g/L of one or more metallic ions (B) selected from metallic ions having from 5.0 to 14.0 of stability constant with the organic phosphonic acid and its salt, and from 0.1 to 10 g/L of surfactant. Particularly, the weight ratio of (A): (B) is in a range of from 100:0.05˜20.

Abstract: A resin-coated steel plate obtained by providing, on at least one surface of the steel plate, (i-1) an alloy layer of iron and at least one metal selected from tin, zinc and nickel or (i-2) a tin-plated layer containing tin in an amount of not smaller than 0.5 g/m2, (ii) a silane coupling agent-treated layer, and (iii) a thermoplastic polyester resin layer in this order from the side of the steel plate. Despite of not containing chromium, the resin-coated steel plate exhibits excellent work adhesion between the steel blank and the organic resin film even when the thickness is reduced due to a severe working and even at portions subjected to severe working such as flanging and necking. By press-molding the resin-coated steel plate, there are obtained cans featuring excellent corrosion resistance and being adapted to containing even highly corrosive contents.