摘要:
Disclosed is a draw-ironed metal vessel having a circumferential side seam, which is formed by lap-bonding of open end portions of upper and lower members, each consisting of a seamless molded metal cap, wherein the side wall of at least one of said upper and lower members is formed by draw-ironing a tin-plated steel plate at an ironing ratio of at least 20% and a spout having a diameter smaller than that of the side wall of the vessel is formed on the top wall of the upper member.
摘要:
A metal vessel has a metal bottomed cup-shaped lower member and a metal cup-shaped upper member, the upper and lower members being bonded together by a circumferential side seam. The upper member has a pouring mouth having a small diameter in the central portion thereof. The metal vessel is formed by lap-bonding the circumferential open ends of both the upper and lower members. The side wall of the upper member is formed by subjecting a primer-coated tin-plated steel sheet to draw forming at a side wall plastic forming ratio R of from 1.1 to 1.8; the side wall plastic forming ratio R being defined by the following formula: ##EQU1## wherein W stands for the weight (g) of the blank of the upper member, t stands for the thickness (cm) of the blank of the upper member at the side wall, .rho. stands for the density (g/cm.sup.3) of the blank of the upper member, D.sub.0 stands for the inner diameter (cm) of pouring mouth of the upper member, and D.sub.1 stands for the average inner diameter (cm) of the side wall.In the circumferential bonded portion, the side wall of the lower member is bonded to the side wall of the upper member through an organic adhesive interposed between a primer coating applied to the side wall of the lower member and a primer coating applied to the side wall of the upper member. The bonding strength and resistance to leakage of the lap-bonded circumferential side seam are improved.
摘要:
Disclosed is a packing can having a circumferential polyhedral wall formed on a can barrel, in which as compared with boundary ridgelines of structural unit faces of the polyhedral wall and crossing points of these boundary ridgelines, the structural unit faces are convex to the interior of the can and the structural unit faces are arranged so that adjacent rows of structural unit faces have a phase difference in the axial direction of the can. This packing can has a very high strength against deformation by application of the external pressure. Furthermore, in preparing this packing can, damage of a coating layer formed on a metal sheet used as the can barrel blank can be effectively prevented.
摘要:
Disclosed is a process for the preparation of a thickness-reduced deep-draw-formed can, which comprises the steps of (i) coating a crystalline thermoplastic resin on a metal plate, (ii) heating the coated metal plate at a temperature higher than the glass transition point (Tg) of the thermoplastic resin and draw-forming the coated metal plated, and (iii) heating the obtained preliminarily drawn cup at a temperature higher than the glass transition temperature (Tg) of the thermoplastic resin and redrawing the cup at a bend-pulling speed of at least 1 m/min. According to this process, damage of the coating layer can be drastically moderated, and a deep-draw-formed can having prominently improved corrosion resistance and heat resistance can be obtained.
摘要:
Disclosed is a thickness-reduced deep-draw-formed can formed of a metal plate having an organic coating. In this can, at least the inner surface organic coating is composed of a crystalline thermoplastic resin, the thickness of the barrel wall is made smaller than the thickness of the bottom, the thermoplastic resin of the barrel wall is molecularly oriented mainly in the axial direction, and the roughness of the metal surface of the barrel wall is larger than that of the metal surface of the bottom. Since the organic coating is crystalline and is molecularly oriented, the coating can resist processing deformation when the thickness is reduced by deep-draw forming and the coating is not damaged by a tool or the like at all, and therefore, the barrier property to corrosive components and the heat resistance are prominently improved.
摘要:
Disclosed is a side seam-coated welded can comprising a welded can body having a seam on the side face and a resin coating layer covering at least one surface side of the seam, wherein said coating layer comprises a thermosetting resin and a thermoplastic resin having a softening point of 50.degree. to 300.degree. C. as determined according to the ring and ball method, at a volume ratio ranging (A) from 95/5 to 25/75 or (B) from 20/80 to 1/99, and one of said two resins is present in the coating in the form of a continuous phase and at least a part of the other resin is present in the coating in the form of fine dispersed particles.This can is excellent in corrosion resistance and processability.
摘要:
A score line defining a portion to be opened is formed on a chromated surface treated steel plate coated with an epoxy type primer so that the score line is cut to the middle of the steel plate in the thickness direction thereof, and an opening tab is bonded and secured to the portion to be opened of the steel plate through a bonding fulcrum composed of a thermoplastic adhesive consisting of amide recurring units and/or ester recurring units so that the push-tearing top end of the opening tab is located on the score line.
摘要:
Disclosed is a side seam-coated welded can comprising a welded can body having a seam on the side face and a resin coating layer covering at least one surface side of the seam, wherein said coating layer comprises a thermosetting resin and a thermoplastic resin having a softening point of 50.degree. to 300.degree. C. as determined according to the ring and ball method, at a volume ratio ranging (A) from 95/5 to 25/75 or (B) from 20/80 to 1/99, and one of said two resins is present in the coating in the form of a continuous phase and at least a part of the other resin is present in the coating in the form of fine dispersed particles.This can is excellent in corrosion resistance and processability.
摘要:
Disclosed is a metal vessel comprising an upper member and a lower member, each consisting of a coated cup-shaped formed metal body and a circumferential side seam being formed by lap-bonding the open ends of the upper and lower members to each other through an adhesive, wherein said coated cup-shaped formed metal body is composed of a metal blank having a coating of a vinyl chloride resin having a vinyl chloride unit content of 30 to 97% by weight and a glass transition temperature of at least 40.degree. C. and containing carboxyl groups and/or hydroxyl groups at a concentration of 10 to 500 millimoles/100 g of the resin, said adhesive is an adhesive composed mainly of a copolyester containing in the main chain at least 50 mole %, based on the total acid component, of terephthalic acid, at least 50 mole %, based on the total alcohol component, of 1,4-butane-diol and at least 1 mole % of at least one member selected from other acids and other alcohols, and the upper and lower members are bonded to each other through said vinyl chloride resin coating and said copolyester type adhesive.
摘要:
Disclosed is a metal vessel comprising an upper member and a lower member, each consisting of a coated cup-shaped formed metal body and a circumferential side seam being formed by lap-bonding the open ends of the upper and lower members to each other through an adhesive, wherein said coated cup-shaped formed metal body is composed of a metal blank having a coating of a vinyl chloride resin having a vinyl chloride unit content of 30 to 97% by weight and a glass transition temperature of at least 40.degree. C. and containing carboxyl groups and/or hydroxyl groups at a concentration of 10 to 500 millimoles/100 g of the resin, said adhesive is an adhesive composed mainly of a copolyester containing in the main chain at least 50 mole %, based on the total acid component, of terephthalic acid, at least 50 mole %, based on the total alcohol component, of 1,4-butane-diol and at least 1 mole % of at least one member selected from other acids and other alcohols, and the upper and lower members are bonded to each other through said vinyl chloride resin coating and said copolyester type adhesive.