Abstract: A laminate obtained by laminating a resin composed chiefly of a polyester on a base material, said resin layer having a melt viscosity ratio (R) defined by the following formula (1),R=.eta..sub.12.2 /.eta..sub.1216 (1)wherein .eta..sub.12.2 is a melt viscosity at an extrusion temperature of the polyester at a shearing rate of 12.2 sec.sup.-1, and .eta..sub.1216 is a melt viscosity at an extrusion temperature of the polyester at a shearing rate of 1216 sec.sup.-1,of not smaller than 2.0 at a melt extrusion temperature of the polyester, and having .eta..sub.1216 of not smaller than 500 poises, and said resin layer being further quickly quenched after it is melt-extruded.

Abstract: A laminate for can-making is disclosed, comprising a metal sheet and a thermoplastic resin layer provided on the surface of the metal sheet. The thermoplastic resin layer comprises a laminate film layer comprising a polyester-base resin intermediate layer (A) containing 10 wt % or more of coloring agent particles, a polyester-base resin outer surface layer (B) and a polyester-base resin backing layer (C). The outer surface layer (B) and the backing layer (C) each contains the coloring agent particles in an amount of 20 wt % or less and at the same time, in an amount less than that contained in the intermediate layer (A). Also disclosed is a process for making a can using the laminate.

Abstract: The process for producing a resin-metal laminate material of the present invention is characterized by comprising providing a heating zone for a metal substrate, a die for feeding a thermoplastic resin in a film form, a pair of temperate laminate rolls for adhering the thermoplastic resin to at least one surface of the metal substrate, and quenching means for quenching the resulting laminate material, along a passage for the metal substrate, supporting and conveying a molten film of the thermoplastic resin from the die with the corresponding temperate laminate rolls and feeding it to a nipping position between the temperate laminate rolls, and fusing the thin film of the thermoplastic resin to at least one surface of the heated metal substrate by means of the temperate laminate rolls. This method can lead to the formation of a uniform and thin-film resin coating on the metal substrate at a high speed, and in addition, the formed resin film has very high intimate adhesiveness and film properties.

Abstract: A shock resistant seamless can comprising a side wall having an inside surface and an outside surface formed from a laminate of a metal substrate and a thermoplastic resin layer provided on the inside surface of the can side wall, wherein the inner surface of the side wall resin layer opposite the metal substrate comprises a plurality of dotted projections.

Abstract: The present invention is a packaging material composed of a thermoplastic polyester as a constituent material. By adjusting the contents of a dibasic carboxylic acid and its oligomer derived from the polyester to 500 ppm or less, and adjusting sodium to 6 ppm or less and all alkali metals to 30 ppm or less, especially 20 ppm or less, the flavor retention of the packaging material can be markedly increased.

Abstract: A method of producing seamless cans wherein a blank holder 2 is inserted in a metal cup 5 coated with an organic film 12, a punch 1 is advanced into a cavity 7 in a die 3 while pushing the bottom 5a of the metal cup onto the flat surface portion 3a of the die by the blank holder 2, so that the side wall 5b of the metal cup 5 is brought into intimate contact with the flat surface portion 3a of the die and with the working corner 3b having a small radius of curvature, thereby to reduce the thickness of the side wall 5b by bend-elongation. Moreover, the portion to be subjected to the necking is ironed at an ironing ratio of not smaller than 5% by the punch 1 in cooperation with the front end 3b.sub.1, of the working corner 3b, or by the front end 3b.sub.

Abstract: A thin-walled, deep-draw-ironed seamless can comprising a laminate of a metal sheet and a biaxially stretched film of polyester or copolyester mainly comprising an ethylene terephthalate unit. The thickness of the side wall portion of the can is reduced to from 30 to 85% of the original thickness of the laminate. The film layer on the side wall portion of the can has a parallel component orientation (D1) defined by formula (1) of 65% or more and a half width (Wh) of the peak at an angle of diffraction 2.theta. of from 14.degree. to 20.degree. falling within 1.8.degree..

Abstract: A laminated metal sheet obtained by laminating a polyester film on a metal sheet, wherein the polyester film has a double refraction represented by the following relation,.DELTA.n=n.sub.m -n.sub.twherein n.sub.m is a refractive index in the direction of a maximum orientation of the film, and n.sub.t is a refractive index in the direction of thickness of the film,which is higher on the side of the front surface of the polyester film than on the side of the metal sheet, and has a peak in the double refraction in a way of thickness from the side of the front surface toward the side of the metal sheet. A seamless can formed from such a laminated metal sheet exhibits excellent shock resistance, flavor-retaining property, corrosion resistance and like properties.

Abstract: An organic resin-coated seamless can with necked-in portion is disclosed, which is produced by subjecting a resin-coated steel sheet to drawing-re-drawing for reducing thickness or to drawing-re-drawing-ironing for reducing thickness-ironing and which has a ratio of diameter of necked-in portion to diameter of body of 0.9 or less than that, said steel sheet being coated by 5- to 30-.mu.m thick organic resin layer on both surfaces of aluminum-killed, surface-treated steel sheet of 0.01 to 0.13 % by weight in total carbon amount and not more than 6.5 .mu.m in average grain diameter having been subjected to over-aging after continuous annealing to adjust to not more than 10 ppm in solid-dissolved carbon amount. This can scarcely has rough surface or pinholes in the necked-in portion even when the necked-in portion has been considerably compressed upon its formation.

Abstract: A polyester laminated draw-formed can which suppresses frothing phenomenon when a carbonated beverage is contained therein and exhibits excellent corrosion resistance, and a coated metal plate used for the production of the cans. The coated metal plate for cans comprises a laminated material of a metal plate, a polyester film layer consisting chiefly of ethylene terephthalate units and, as required, an adhesive primer layer interposed between the metal plate and the polyester film, wherein the polyester film layer that is on the inner surface side of the can has a surface that is molecularly oriented in at least the biaxial directions, and larger protrusions on the surface over a visual field of 100 .mu.m.times.100 .mu.m as observed using an interatomic force microscope (AFM) have an average height (H) of three points of 0.20 .mu.m or smaller.

Abstract: A seamless can obtained by forming a laminated material of a metal and a polyester film into a cup such that a final draw ratio defined by H/D (H:height, D:diameter of the bottom portion) is not smaller than 1.5, wherein a polyester (A) on the bottom portion of the container has a biaxial orientation degree (R.sub.X) of from 2.5 to 20 defined by the following formula (1),R.sub.X =I.sub.A /I.sub.B (1)and a polyester on the barrel portion of the container has a monoaxial orientation satisfying the following formula (2),0.55<cos.sup.2 .phi.<1-exp ?-0.45I.sub.A /I.sub.B -1.1.epsilon.+0.53!(2)wherein R.sub.x, I.sub.a, I.sub.b and cos.sup.2 .phi. are as defined in the specification, and a method of producing the same.

Abstract: A laminated draw-formed container that is obtained by draw-forming a laminated material of a metal plate on which a resin film is laminated into a cup having bottom, wherein said resin film comprises a surface layer of a high molecular oriented copolymerized polyester derived from acid components of 85 to 97% of terephthalic acid and 3 to 15% of isophthalic acid, and a diol component, and a lower layer of a low molecular oriented copolymerized polyester (B) derived from acid components of 84.5 to 96.5% of terephthalic acid and 3.5 to 15.5% of isophthalic acid, the amount of the isophthalic acid being larger than that of the copolymerized polyester (A) of the surface layer, and a diol component, and said surface layer having a double refraction method orientation degree (.DELTA. n) as represented by the following relation,.DELTA. n=n.sub.1 -n.sub.2wherein n.sub.1 is a refractive index in the direction of a maximum orientation of the film, and n.sub.

Abstract: A laminated sheet metal for the manufacture of containers is made from a sheet metal and, a layered thermoplastic resin film wherein the primer resin includes from about 50 to about 98 weight percent of polyamidodicarboxylic acid-modified epoxy resin, from about 2 to about 50 weight percent of curing agent resin, and from about 0.05 to about 10 weight percent of curing catalyst; also disclosed is a primer resin composition for use in the manufacture of laminated sheet metal for use in the manufacture of containers, made from about 50 to about 98 weight percent of polyamidodicarboxylic acid-modified epoxy resin, from about 2 to about 50 weight percent of curing agent resin, and from about 0.05 to about 10 weight percent of curing catalyst.

Abstract: A thickness-reduced deep-draw-formed can obtained by using, as the substrate, a cold-rolled steel plate having a carbon content in the steel of 0.02 to 0.15% by weight, a manganese content in the steel of 0.2 to 1.0% by weight, a mean diameter of crystal grain of smaller than 6.0 .mu.m, a tensile strength over a range of from 35 to 55 kg/mm.sup.2, and a thickness of 0.17 to 0.30 mm in a step of subjecting an organic resin-coated structure of the surface-treated steel plate to the thickness-reducing deep-draw forming. This makes it possible to suppress the generation and accumulation of heat in the organic resin-coated steel plate to a level lower than the conventional levels. Therefore, the organic resin coating is prevented from being peeled off or damaged and, as a result, the corrosion resistance can be markedly improved.

Abstract: A laminated draw-formed container obtained by draw-forming a laminated material of a metal plate on which a resin film is laminated into a cup with bottom, wherein the resin film comprises a polyester composition which contains a polyethylene terephthalate component as a chief component and further contains a polyethylene isophthalate component and a polybutylene terephthalate component, the resin film having a density of from 1.32 to 1.39 g/cc at any part of the container and further having, on the upper part of the container, a trans ratio of ethylene glycol residue of from 0.1 to 1.5 as found by the ATR method, as well as a process for producing the container. The draw-formed container exhibits excellent shock resistance irrespective of the passage of time, and particularly dent resistance and barrier property against corrosive components, as well as intimate adhesion to the metal substrate.

Abstract: Disclosed is a process for making a preliminarily printed formed body, which is characterized in that a halftone separated rectangular printing plate is once made from a rectangular original, halftone dots of each halftone-separated image are developed on an annular plane by picture element units finer than the halftone dots to deform the shapes of the dots, an annular halftone dot image is formed based on the changes of the shapes of the halftone dots and a halftone printing plate for the annular halftone dot image is made, and this halftone printing plate is applied to a blank to be formed. According to this process undesirable formation of a striped pattern caused by the elongating flow of the blank in the height direction and the contracting flow of the blank in the circumferential direction is prevented and a strange feeling is not given to the printed image, and a faithful printed image can be reproduced.

Abstract: 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.

Abstract: 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.

Abstract: In a method of producing a metallic container by subjecting a metallic material having an organic resin coating to single-staged or multiple-staged drawing, uniformly coating a lubricant on the surface of the organic resin coating of the metallic material and draw-forming the coated material, according to the present invention, a high lubricating property is obtained at the time of drawing by using a small amount of a saturated hydrocarbon as the lubricant, and by simply heating the formed can, a major portion of the lubricant can be removed and the degreasing and washing steps or the subsequent drying step essential in the conventional method, can be omitted, with the result that the printability or the flavor-retaining property can be markedly improved, and consumption of water resource and energy resource can be reduced and a high effect of preventing environmental pollution can be attained.