Abstract: A method of DI forming a laminated metal sheet includes drawing a laminated metal sheet; and redrawing and ironing the drawn laminated metal sheet, wherein a water-based coolant including (a) at least one base selected from the group consisting of alkanolamines and alkali metal hydroxides, (b) a fatty acid, and (c) water is used in the redrawing and ironing, and wherein a total content of the base (a) and the fatty acid (b) is 0.02 to 4% by mass and a ratio of a straight-chain fatty acid having a carbon number of 6 to 12 in the fatty acid (b) is 80 to 100% by mass.

Abstract: A DI forming water-based coolant of a laminated metal sheet includes at least one kind of base (a) selected from alkanolamines and alkali metal hydroxides, a fatty acid (b), and water (c), wherein the total content of the base (a) and the fatty acid (b) is 0.02 to 4% by mass and the ratio of a straight-chain fatty acid having a carbon number of 6 to 12 in the fatty acid (b) is 80 to 100% by mass.

Abstract: A method to evaluate the corrosion resistance of a can to a content includes filling the can with the content to form a specimen, setting the specimen in an apparatus capable of blocking an outside atmosphere from entering the specimen, optionally saturating the content with nitrogen gas to expel dissolved oxygen present in the content, thereafter while maintaining the temperature of the content at a constant temperature in the range of 25 to 60° C., applying a constant potential that is more anodic than an immersion potential by 50 mV to 200 mV to the can of the specimen, and evaluating the corrosion resistance of the can to the content based on the accumulated amount of electricity generated during a time appropriately selected from 6 to 48 hours immediately after the application of the constant potential.

Abstract: A resin-coated metal sheet includes resin layers formed on both surfaces thereof and composed of a polyester as a main component, wherein the resin layer covering the inner surface of a container after the formation thereof has an interfacial free energy with water of 30 mN/m or more. The container formed from the resin-coated metal sheet exhibits an excellent content release property for contents with a high protein content.

Abstract: There is provided a laminated metal sheet used for making a highly processed two-piece can body which endures harsh conditions such as retort treatment, and a two-piece can body made of the laminated steel sheet. A laminated metal sheet for a two-piece can body, including a metal sheet having a polyester resin film layer on each side of the metal sheet, the polyester resin film layer to be the outside of the can body having a crystallization temperature of 60 to 100° C., and the surface of the polyester resin film layer having a center line surface roughness (Ra) of 0.2 to 1.8 ?m. The polyester resin film layer to be the outside of the can body is preferably composed of 40 to 100% by mass of a resin composed mainly of butylene terephthalate and 0 to 60% by mass of a resin composed mainly of ethylene terephthalate.

Abstract: A can body for a two-piece can made of a laminated steel sheet, the laminated steel sheet containing a steel sheet and a copolyethylene terephthalate resin layer containing at least hyone member selected from the group consisting of isophthalic acid and cyclohexane dimethanol as a copolymer component in a proportion of 5 to 20 mol %, and having a crystallization temperature of 120° C. to 140° C. on at least one side of the steel sheet; and satisfying the following relationships: r1?r, 0.1?r1/R?0.25, and 1.5?h/(R?r)?4, wherein r1 represents the minimum radius of the can body, r represents the maximum radius of the can body, h represents the height of the can body, and R represents the radius of the laminated steel sheet having a circular shape before shaping whose weight is the same as that of the can body. The can body has a high strain level, and does not suffer from delamination and breakage of the resin layer.

Abstract: A method to evaluate the corrosion resistance of a can to a content includes filling the can with the content to form a specimen, setting the specimen in an apparatus capable of blocking an outside atmosphere from entering the specimen, optionally saturating the content with nitrogen gas to expel dissolved oxygen present in the content, thereafter while maintaining the temperature of the content at a constant temperature in the range of 25 to 60° C., applying a constant potential that is more anodic than an immersion potential by 50 mV to 200 mV to the can of the specimen, and evaluating the corrosion resistance of the can to the content based on the accumulated amount of electricity generated during a time appropriately selected from 6 to 48 hours immediately after the application of the constant potential.

Abstract: A method for manufacturing a can body by forming a circular laminated steel sheet having a radius of R0 includes producing a form at least one time with a laminated steel sheet coated with a polyester resin, which has a plane orientation coefficient of 0.06 or less such that that the height h, the maximum radius r, and the minimum radius d of the form satisfy d?r, 0.2?d/R?0.5, and 1.5?h/(R?r)?2.5, where R represents the radius of the laminated steel sheet having a weight equivalent to the weight of a final form; heating the resulting form at least one time at a temperature of 150° C. or higher, and lower than or equal to the melting point of the polyester resin; and working the heat-treated form into a form satisfying d?r, 0.1?d/R?0.25, and 1.5?h/(R?r)?4.

Abstract: In a method for producing a two-piece can, a circular disk of a laminated steel sheet having a thermoplastic resin coating layer is subjected to multistage forming to produce a final formed body having a height h, a maximum radius r, and a minimum radius d (the case where r is equal to d is also included). Forming is performed so that the height h, maximum radius r, and minimum radius d of the final formed body satisfy the relationships 0.1?d/R?0.25 and 1.5?h/(R?r)?4 with respect to a radius R of a circular disk before forming whose weight is equal to that the final formed body. At an intermediate stage of forming, a formed body is subjected to heat treatment at a temperature of not less than a melting point of a thermoplastic resin but not more than a temperature 30° C. higher than the melting point.

Abstract: A laminated steel sheet including a polyester resin layer arranged on at least one face of the steel sheet, polyester resin forming the polyester resin layer is obtained by polycondensation of dicarboxylic acid and diol components, the dicarboxylic component contains terephthalic acid as the main ingredient and a copolymerizing ingredient, the diol component comprises ethylene and/or butylene glycol as a main ingredient and a copolymerizing ingredient, the sum of the copolymerizing ingredient in the dicarboxylic acid and the copolymerizing ingredient in the diol component is 8 to 16% by mole in the polyester resin, and the polyester resin layer has 0.06 or less of plane orientation factor.

Abstract: We manufacture a two-piece can by the method using a laminated steel sheet as the base material, having the steps of: drawing a cylindrical blank for several times to form a can body in a shape of cylinder integrated with bottom; forming a tapered part extending outward from the can body in the radial direction thereof at the tip of the opening of the can body; applying diametral reduction to the tapered part to the diameter of the can body; and applying diametral reduction to the opening side of the can body to a diameter smaller than the diameter of the can body, while satisfying the formulae (1) and (2), 1.5?h/(R?R)??(1) d/R?0.25??(2) where h is the height from the can bottom to the tip of the opening, R is the circular blank positional radius, r is the radius of the can bottom, and d is the radius of the tip of the opening.

Abstract: A colored laminated metal plate for containers includes a metal plate having one or both surfaces coated with a film for lamination in which a colored adhesive layer is coated to a polyester resin film. The colored adhesive layer contains a polyester resin as a main component and further contains an etherified amino resin, an epoxy resin, a strong acid compound, and a coloring agent. The colored laminated steel sheet is excellent in deep drawability, adhesion after forming, rust resistance of a damaged portion, and so on. When the steel sheet is applied to manufacturing of a container such as a can, retort whitening of the laminate film hardly occurs, and the design properties of appearance can be maintained.

Abstract: A DI forming water-based coolant of a laminated metal sheet includes at least one kind of base (a) selected from alkanolamines and alkali metal hydroxides, a fatty acid (b), and water (c), wherein the total content of the base (a) and the fatty acid (b) is 0.02 to 4% by mass and the ratio of a straight-chain fatty acid having a carbon number of 6 to 12 in the fatty acid (b) is 80 to 100% by mass.

Abstract: The mold apparatus has a pair of upper and lower molds being used for forming a score on one side surface of an easy-opening can end fabricated by a laminated metal sheet. The upper mold has a convex part for forming the score, and the cross sectional shape of the convex part at the portion contacting the laminated metal sheet is composed of a curve having a change rate of inclination of 0.08 or smaller to the upper surface of the facing lower mold, or having the curve and a straight line. The formed score has a maximum width of 0.80 mm or smaller.

Abstract: There is provided a laminated metal sheet used for making a highly processed two-piece can body which endures harsh conditions such as retort treatment, and a two-piece can body made of the laminated steel sheet. A laminated metal sheet for a two-piece can body, including a metal sheet having a polyester resin film layer on each side of the metal sheet, the polyester resin film layer to be the outside of the can body having a crystallization temperature of 60 to 100° C., and the surface of the polyester resin film layer having a center line surface roughness (Ra) of 0.2 to 1.8 ?m. The polyester resin film layer to be the outside of the can body is preferably composed of 40 to 100% by mass of a resin composed mainly of butylene terephthalate and 0 to 60% by mass of a resin composed mainly of ethylene terephthalate.

Abstract: Provided is a laminated steel sheet for a can body of a two-piece can, containing a copolyethylene terephthalate resin layer containing at least one member selected from the group consisting of isophthalic acid and cyclohexane dimethanol as a copolymer component in a proportion of 5 to 20 mol % and having a crystallization temperature of 120° C. to 140° C. on at least one side of a steel sheet; and satisfying the following relationships: r1?r, 0.1?r1/R?0.25, and 1.5?h/(R?r)?4, wherein r1 represents the minimum radius of the can body, r represents the maximum radius of the can body, h represents the height of the can body, and R represents the radius of the laminated steel sheet having a circular shape before shaping whose weight is the same as that of the can body. The laminated steel sheet is suitable for a can body of a two-piece can having a high strain level, and can provide a two-piece can body which is free from delamination and breakage of the resin layer.

Abstract: We manufacture a two-piece can by the method using a laminated steel sheet as the base material, having the steps of: drawing a cylindrical blank for several times to form a can body in a shape of cylinder integrated with bottom; forming a tapered part extending outward from the can body in the radial direction thereof at the tip of the opening of the can body; applying diametral reduction to the tapered part to the diameter of the can body; and applying diametral reduction to the opening side of the can body to a diameter smaller than the diameter of the can body, while satisfying the formulae (1) and (2) 1.5?h/(R?r)??(1) d/R?0.25??(2) where h is the height from the can bottom to the tip of the opening, R is the circular blank positional radius, r is the radius of the can bottom, and d is the radius of the tip of the opening.

Abstract: In a method for producing a two-piece can, a circular disk of a laminated steel sheet having a thermoplastic resin coating layer is subjected to multistage forming to produce a final formed body having a height h, a maximum radius r, and a minimum radius d (the case where r is equal to d is also included). Forming is performed so that the height h, maximum radius r, and minimum radius d of the final formed body satisfy the relationships 0.1?d/R?0.25 and 1.5?h/(R?r)?4 with respect to a radius R of a circular disk before forming whose weight is equal to that the final formed body. At an intermediate stage of forming, a formed body is subjected to heat treatment at a temperature of not less than a melting point of a thermoplastic resin but not more than a temperature 30° C. higher than the melting point.

Abstract: A method for manufacturing a can body for a two-piece can by multistage forming of a circular laminated steel sheet having a radius of R0 includes the steps of producing a form at least one time by using a laminated steel sheet coated with a polyester resin, which has a plane orientation coefficient of 0.06 or less, in such a way that the height h, the maximum radius r, and the minimum radius d of the form satisfy d?r, 0.2?d/R?0.5, and 1.5?h/(R?r)?2.5, where R represents the radius of the laminated steel sheet having a weight equivalent to the weight of a final form; heating the resulting form at least one time at a temperature of 150° C. or higher, and lower than or equal to the melting point of the polyester resin; and working the heat-treated form into a form satisfying d?r, 0.1?d/R?0.25, and 1.5?h/(R?r)?4. This method easily produces a can body for a laminated steel sheet two-piece can at a low cost without occurrence of peeling nor breakage of a resin.

Abstract: The laminated steel sheet for two-piece can satisfies the relation of the height h of the final formed body, the maximum radius r thereof, the minimum radius d thereof, with the radius R of circular disk, before forming, having the same weight to that of the final formed body, as [0.1?d/R?0.25] and [1.5?h/(R?r)?4]. The laminated steel sheet has a polyester resin layer prepared by polycondensation of a dicarboxylic acid component and a diol component. The dicarboxylic component has terephthalic acid as the main ingredient, and the diol component has ethylene glycol and/or butylene glycol as the main ingredient. The quantity of copolymerizing ingredients is ranging from 8 to 16% by mole. The plane orientation factor of the resin is 0.06 or less.