WO2004113181A1 - 流通時の破胴耐性およびフランジクラック耐性に優れた樹脂被覆アルミニウム・シームレス缶体 - Google Patents
流通時の破胴耐性およびフランジクラック耐性に優れた樹脂被覆アルミニウム・シームレス缶体 Download PDFInfo
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- WO2004113181A1 WO2004113181A1 PCT/JP2004/008751 JP2004008751W WO2004113181A1 WO 2004113181 A1 WO2004113181 A1 WO 2004113181A1 JP 2004008751 W JP2004008751 W JP 2004008751W WO 2004113181 A1 WO2004113181 A1 WO 2004113181A1
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- resin
- thickness
- aluminum plate
- thermoplastic resin
- film
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/22—Boxes or like containers with side walls of substantial depth for enclosing contents
- B65D1/26—Thin-walled containers, e.g. formed by deep-drawing operations
- B65D1/28—Thin-walled containers, e.g. formed by deep-drawing operations formed of laminated material
-
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- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/12—Cans, casks, barrels, or drums
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/12—Cans, casks, barrels, or drums
- B65D1/14—Cans, casks, barrels, or drums characterised by shape
- B65D1/16—Cans, casks, barrels, or drums characterised by shape of curved cross-section, e.g. cylindrical
- B65D1/165—Cylindrical cans
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
- B65D3/22—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines with double walls; with walls incorporating air-chambers; with walls made of laminated material
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/06—Coating on the layer surface on metal layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
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- B32B2439/00—Containers; Receptacles
- B32B2439/40—Closed containers
- B32B2439/66—Cans, tins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
- B32B2439/70—Food packaging
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/131—Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.]
- Y10T428/1317—Multilayer [continuous layer]
- Y10T428/1321—Polymer or resin containing [i.e., natural or synthetic]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1355—Elemental metal containing [e.g., substrate, foil, film, coating, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1355—Elemental metal containing [e.g., substrate, foil, film, coating, etc.]
- Y10T428/1359—Three or more layers [continuous layer]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1379—Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1379—Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit
- Y10T428/1383—Vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit is sandwiched between layers [continuous layer]
Definitions
- the present invention relates to a resin-coated aluminum seamless can body containing beverages such as carbonated beverages, beer, juice, alcoholic beverages, and water, and more particularly, to the resistance to fracture and flange cracking during distribution. Regarding excellent resin-coated aluminum and seamless cans.
- an aluminum drawn and ironed can body widely used for beverage cans and the like includes a can body and a can bottom continuously connected to the can body.
- an aluminum plate is formed into a disk shape.
- a punched blank is used, and the can body side wall of the can body is thinned by a method such as drawing and redrawing and ironing.
- the upper part of the can body is reduced in size to attach a lid to the opening (neck-in part).
- Such a molding method can reduce only the thickness of the can body side wall without reducing the thickness of the can bottom required for pressure resistance, and can save resources significantly compared to the conventional three-piece can body. Power Widely used.
- the re-drawing and ironing process following the drawing process increases the reduction rate of the sheet thickness to 60-70%, and the aluminum material before processing has a sheet thickness of 0.3 Omm.
- the thickness of the side wall of the can body has been reduced to about 0.10 mm by DI processing, and research and development to further reduce the thickness has been continued with Bow I.
- the thinned aluminum drawn and ironed can body has an extremely thin can body side wall as described above, it is widely applied to beer and carbonated beverage applications which contain carbon dioxide gas and generate internal pressure by themselves.
- contents that do not generate internal pressure such as tea drinks
- they are filled with liquid nitrogen gas and applied (positive pressure cans).
- beverage cans filled with contents in such thinned aluminum squeezed and ironed cans the wall of the can body is extremely thin, so it can be accidentally dropped in a carton case or alone in the distribution process.
- Patent Document 1 proposes that in order to improve the strength of a beverage can, a component of an aluminum alloy material, which is a raw material, is specified, and the elongation at break of the beverage can is improved by heat treatment.
- Patent Document 1 JP-A-8-199273
- the present invention has been made in view of such a problem, and even if the cylindrical can body side wall portion has the same thickness as the related art or is thinner than the related art, it has excellent flange crack resistance, Provide a can body that does not crack on the side wall of the can even if a projection from the outside of the can is pressed against the can body or dropped to apply an impact. It is a thing.
- an object of the present invention is to provide a can having high piercing strength, excellent piercing resistance, and excellent flange crack resistance.
- the resin-coated aluminum 'seamless can body of the present invention is a seamless can body formed by drawing and ironing and Z or stretch draw molding,
- thermoplastic resin layer is provided on the inner surface of the can and / or the outer surface of the can,
- the total thickness of the thermoplastic resin layer is 2-50 ⁇ m on the inner surface and the outer surface, the minimum aluminum plate thickness on the side wall of the can body is 0.110 mm or less;
- the tensile breaking strength of the aluminum plate from which the thermoplastic resin was removed from the side wall of the can was measured in the circumferential direction of the can and was 450 MPa or less.
- the product of the tensile strength s (MPa) measured in the can height direction on the side wall of the can body including the thermoplastic resin layer is
- the resin-coated aluminum seamless can of the present invention is excellent in fracture resistance during distribution and flange crack resistance during molding or filling and tightening.
- the thermoplastic resin is a polyester resin as in the can according to claim 2, so that the thermoplastic resin aluminum plate can be previously formed as in the can according to claim 3.
- drawing and ironing and Z or stretch draw forming are performed, and the thickness is reduced to 50% or more of the original plate thickness, as in the case of the can according to claim 4.
- the polyester resin coating on the side wall of the can body of the can body contains oriented crystals, thereby providing a can body having excellent fracture resistance during distribution and flange cracking during molding and filling and winding. can do.
- a polyester resin layer is provided on the inner surface of the can and / or the outer surface of the can, the polyester resin layer contains oriented crystals, and a parameter representing the degree of axial orientation of the oriented crystals of the polyester resin layer in the can height direction.
- a can body having a higher piercing strength than the conventional one can be manufactured at low cost even if the cylindrical can body side wall is the same or thinner than the conventional one.
- the tensile strength at break s measured in the circumferential direction of the can body side wall aluminum plate, which is the base plate of the can body was regulated to 450 MPa or less, so that there was no liquid leakage that would prevent flange cracking during filling. Can provide body.
- FIG. 1 is a schematic cross-sectional view of an inner resin-coated aluminum 'seamless can according to an embodiment of the present invention.
- FIG. 2 is a graph showing the relationship between the tensile strength in the circumferential direction of the can and the rate of occurrence of flange cracks.
- FIG. 3 is a schematic diagram illustrating the relationship of t X s of an aluminum resin-coated aluminum seamless can body of the present invention.
- FIG. 4 is an explanatory diagram for evaluating fracture resistance using a piercing strength measurement method.
- FIG. 5 is an explanatory diagram of a plate thickness (Tf) of a portion corresponding to a neck-in portion and a plate thickness (Tw) of a can body side wall portion.
- FIG. 6 is an X-ray diffraction intensity curve of the (100) plane.
- FIG. 7 is an X-ray diffraction intensity curve of the ( ⁇ 105) plane.
- FIG. 8 is an explanatory diagram showing the relationship between the parameter H of the oriented crystal, heat of fusion, and fracture resistance.
- FIG. 9 shows the measurement results of the heat of fusion of the polyester film at the position where the wall thickness of the can is the thinnest in the height direction of the can.
- Tf thickness of the part corresponding to the neck-in part
- Tw Can body side wall thickness
- FIG. 1 is a schematic sectional view of a resin-coated aluminum drawn and ironed can explaining an embodiment of the present invention.
- reference numeral 10 denotes a resin-coated aluminum drawn and ironed can body
- 11 denotes an aluminum plate serving as a base of the resin-coated aluminum drawn and ironed can body
- 12 denotes an inner surface of the resin-coated aluminum drawn and ironed can body 10. It is a coated inner resin layer.
- 13 is a neck-in part
- 14 is a flange part
- the outermost surface on the outer surface side of the can may have an outer surface side resin layer and / or a printing layer and a finishing varnish layer (not shown).
- an aluminum plate serving as a base of the resin-coated aluminum drawn and ironed can body 10 of the present invention alloys of 3000s, 5000s, and 6000s used in various kinds of anoremi materials and ifjIS4000i are used. You.
- composition of the aluminum plate is preferably as follows.
- Mn raises the recrystallization temperature of aluminum and changes the crystallization state using Fe in aluminum as a compound to improve the corrosion resistance of the can body.
- / 0 Q / o is on a weight basis, the same applies hereinafter is preferably added. If the added amount of Mn is less than 0.1%, the corrosion resistance of the can body cannot be sufficiently obtained, while if the added amount of Mn exceeds 1.5%, the moldability decreases.
- Mg improves the strength, moldability, corrosion resistance, and the like of the can body, it is preferable to add 0.8 to 5.0% of added calories. If the added amount of Mg is less than 0.8%, the strength of the can is not sufficiently obtained, while if the added amount of Mg exceeds 5.0%, the formability is reduced, and cracks and wrinkles are generated. I get cramped.
- Cu improves the strength of the can body, it is preferably 0.01% to 0.8%. If the added amount of Cu is less than 0.01%, the corrosion resistance of the aluminum can body cannot be sufficiently obtained, while if the added amount of Cu exceeds 0.8%, the formability decreases.
- Si improves the strength and abrasion resistance of the can body by precipitating an intermediate phase with Mg, it is preferable to add 0.03 to 0.6% of added calorie. If the added amount of Si is less than SO. 03%, the strength of the canister is not sufficient, while if the added amount of Si exceeds 0.6%, the formability during drawing and ironing decreases. I do.
- Fe changes the crystallization state by using Mn in aluminum as a compound to improve the corrosion resistance of the can body, it is preferable to add 0.05-0.8%. If the added amount of Fe is less than 0.05%, sufficient strength of the can body cannot be obtained, while if the added amount of Fe exceeds 0.8%, the moldability decreases.
- the thickness of the aluminum plate as the can is generally preferably in the range of 0.1 to 1.00 mm from the viewpoint of the strength and moldability of the can, but the thickness of the side wall of the can body after molding is good. (Minimum thickness of aluminum excluding the resin coating on the side wall of the can body) is preferably 0.110 mm or less. If the minimum thickness of aluminum on the side wall of the can body exceeds 0.110 mm, draw and iron This is because the purpose of the tretetch draw can is that it is not possible to save resources by reducing the side wall of the can, leading to a reduction in the cost of the can body.
- the surface of the aluminum plate can be subjected to a surface treatment in order to enhance the processing adhesion with the coating resin.
- an aluminum plate can be cold-rolled, and a chromic acid phosphate treatment or another organic / inorganic surface treatment can be applied by immersion or spray treatment. Further, a coating type surface treatment can also be used.
- the amount of chromium is preferably 5 to 40 mg / m 2 as a total chromium from the viewpoint of processing adhesion of the laminated resin film.
- the range of m 2 is more preferred.
- the total chrome amount is 8 mg / m 2 or less.
- a chromic acid phosphate-treated film is formed by a known method, for example, after degreasing and slightly etching an aluminum plate with caustic soda, CrO: 4g / L, H PO: 12g / L, F: 0.65g / L, rest like water
- the resin film 12 as a resin layer that covers the can body is a thermoplastic resin film with relatively high transparency and excellent heat resistance, such as a polyester film, nylon film, or polypropylene film with a thickness of 2 to 50 ⁇ m. Is mentioned.
- polyester film a film containing ethylene terephthalate, ethylene butyrate, and ethylene isophthalate as main components is preferably used.
- thermoplastic resin film When a polyester film is used as the thermoplastic resin film, other components can be copolymerized.
- aromatic dicarboxylic acids such as naphthalene dicarboxylic acid, diphenyl dimethyl dicarboxylic acid, diphenyl sulfone dicarboxylic acid, diphenoxyethane dicarboxylic acid, 5_ sodium sulfoisophthalic acid, and phthalic acid; Aliphatic dicarboxylic acids such as oxalic acid, succinic acid, adipic acid, sebacic acid, dimer acid, maleic acid and fumaric acid, alicyclic dicarboxylic acids such as cyclohexanedicarboxylic acid, and oxycarboxylic acids such as p-oxybenzoic acid Acids and the like.
- the glycol components to be copolymerized include aliphatic glycols such as propanediol, butanediol, pentanediol and neopentyl glycol, alicyclic glycols such as cyclohexanedimethanol, bisphenol A, bisphenol S And the like, and polyoxyethylene glycols such as diethylene glycol and polyethylene glycol. Two or more of the above dicarboxylic acid components and dalicol components can be used in combination.
- thermoplastic resin film When a nylon film is used as the thermoplastic resin film, a condensation polymer of diamine and dicarboxylic acid such as nylon 66, nylon 610, nylon 612, etc. A ring-opening polymer of ratatum such as Nylon 12 can also be used.
- the production of such a resin film 12 can be carried out by a conventional method. Can be manufactured.
- the resin layer 12 used in the present embodiment is made of a polyester resin such as polyethylene terephthalate (PET), and the resin coating is substantially unformed in the state of a resin-coated anor- minium plate before forming of a drawn ironing can. Preferably, it is oriented.
- PET polyethylene terephthalate
- the stretched resin layer be turned into a non-oriented layer by heating during lamination or after lamination.
- the unoriented unstretched resin layer is inferior in barrier property to the stretched resin layer.
- the surface layer those polyethylene terephthalate / Isofutare preparative isophthalic acid content 0- 13 mole 0/0 [A], the lower ones isophthalic acid content of 4 one 20 mole% [B] It is also possible to adopt a two-layer structure. This makes it possible for the molded can to have substantially the same nodal properties as the stretched resin layer.
- the resin-coated aluminum drawn and ironed can 10 is formed from such a resin-coated aluminum plate by drawing, stretching, or ironing, the resin is oriented and crystallized, the strength is increased, and the resin is stretched. As in the case of using a film, barrier properties are improved, and corrosion resistance ⁇ dent resistance and tool flaw resistance are improved.
- the total thickness of the resin layer on the resin-coated metal plate is determined when the can is distributed.
- the thinnest part preferably has a thickness of 2 ⁇ m or more, and particularly preferably 5 ⁇ m or more.
- the upper limit of the thickness is preferably 50 xm or less from the viewpoint of economy, and particularly preferably 25 ⁇ m or less.
- the production of a resin-coated aluminum plate used for producing a can body is performed by a known method.
- a method of laminating a cast film, a method of directly coating a resin layer on an aluminum plate by an extrusion coating method, and the like are mentioned.
- the aluminum plate can be coated with two resin layers by using a coextrusion coating method.
- the flange crack resistance is related to the tensile strength at break (MPa) measured in the circumferential direction of the aluminum plate excluding the resin coating on the side wall of the can body.
- the circumferential direction of the can means the circumferential direction of the can body perpendicular to the can height direction of the can body.
- the can body and the lid are fastened in such a manner that the curled portion of the lid processed into a predetermined shape and the flange portion 14 formed at the opening of the can body are wrapped together from outside by a winding roll. Then, the lid and the can are joined by pressing the wound portion from outside.
- the tensile strength at break in the circumferential direction exceeds 450 MPa, flange cracks occur at the time of filling and winding of the contents, and the probability of leakage increases. Therefore, in the present invention, it is important to specify the tensile strength at break in the circumferential direction to be 450 MPa or less.
- a diamond-shaped dent having a diagonal line in the circumferential direction of the can body side wall is generated with the tip of the projection as the top.
- the tensile strength s of the can body side wall was measured in various directions, and the correlation between t X s and the breaking time was calculated. The strongest correlation was obtained when the tensile strength in the can height direction was adopted. I understood.
- t refers to the minimum thickness (mm) of the can body side wall including the thermoplastic resin layer
- s refers to the tensile strength (Mpa) of the can body side wall including the thermoplastic resin layer.
- the can body of the present invention has a fracture resistance against the can body side wall thickness t including the thermoplastic resin layer of the can body and the can body side wall portion including the thermoplastic resin layer. It can be seen that there is a correlation between the product of the tensile strength s and the product of.
- thermoplastic resin Is oriented and crystallized to increase the strength of the resin.
- the polyester resin laminated on the inside and / or outside of the can body of the can body is crystallized in plane or axial orientation.
- the strength of the polyester resin is improved, and the breakage resistance of the can body during distribution can be increased.
- the oriented crystallization of the thermoplastic resin can be carried out by drawing and ironing and Z or stretch draw molding, which are the processing methods for forming a resin-coated aluminum plate into a can body.
- drawing and ironing and Z or stretch draw molding are the processing methods for forming a resin-coated aluminum plate into a can body.
- a melt-extruded thermoplastic resin film that has been biaxially stretched in the machine direction and oriented and crystallized must be prepared in advance.
- the can 10 of the present embodiment Using a plate in which an aluminum plate is coated with a thermoplastic resin, this is punched into a disk shape and used as a blank material, and then drawn and ironed or / and stretch drawn, and formed into a cylindrical shape. At this time, the material used can be reduced by reducing the thickness of the side wall, and the cost can be reduced.
- Stretch draw molding refers to a method of manufacturing a relatively elongated seamless can body from a metal cup using a bunch, a wrinkle presser, and a die.
- the wrinkle presser is inserted into the metal cup, and the metal cup is pressed with the wrinkle presser.
- the bottom against the plane of the die advance the punch into the cavity of the die, keeping the outer surface of the side wall of the metal cup in close contact with the plane of the die, the small radius of curvature of the die, and the processing corner.
- ironing can be provided by the clearance between the die and the punch.
- the can body thus formed is trimmed to make the can height uniform. Also, if necessary, cleaning or heat treatment of the can body for removing the lubricant during molding is performed. Thereafter, ink and finishing varnish are usually applied for external printing, and baking is performed to harden these inks and finishing varnish. After that, the diameter of the opening of the opening of the can body is reduced by a neck inker. After the neck-in portion 13 is formed and has a predetermined diameter, a flange portion 14 for fastening a lid to a tip portion is formed by a flange cover.
- a lubricant is applied to the resin-coated aluminum plate, punched by a cutting press, and a drawing cup is formed at a high speed by a drawing method.
- the can body is thinned.
- the resin-coated aluminum drawn and ironed can body 10 is formed by a conventional method such as drawing and ironing (DI processing) such that the resin 12 coated surface of the aluminum plate is formed on the inner side of the can. It is manufactured by subjecting to known means.
- DI processing drawing and ironing
- the resin-coated aluminum 'seamless can body 10 of the present invention can be produced by a method of ironing by one or several steps using an ironing punch.
- Aperture conditions Aperture ratio: 1. 1 1 3.0
- the thickness At the time of ironing, it is preferable to reduce the thickness so that the ironing ratio RI defined by the following equation is 5085%.
- RI ((tB-tW) / tB) X 100
- tB is the thickness of the aluminum plate blank
- tW is the thickness of the aluminum plate on the side wall of the drawn and ironed can.
- various lubricants such as liquid paraffin, synthetic paraffin, edible oil, hydrogenated edible oil, palm oil, and various natural materials are added to an aluminum plate or a resin-coated aluminum plate or a draw cup. Molding can be performed by applying wax, polyethylene wax, synthetic ester, mineral oil and the like.
- the coating amount of the lubricant is different depending on the type, typically 10- 6 000mg / m 2 for one surface, the coating of lubricant, this molten state, or sprayed on the surface with an aqueous solution or undiluted state Alternatively, it is performed by roll coating.
- Ironing is performed by re-drawing and ironing several steps while lubricating and cooling by applying coolant to the drawing cup.
- both surfaces are covered with a thermoplastic resin, redrawing and several steps of ironing can be performed without applying a coolant.
- thermoplastic resin film can be coated on the outer surface of the body of the aluminum can body formed using the aluminum plate base plate. Further, if the thermoplastic resin film is printed, it can be used as a printed label.
- thermoplastic resin film on the outer surface of a can formed using a thermoplastic resin-coated aluminum plate. In this case, the resistance of the can to the puncture is further improved.
- Ironing punch diameter 65.8 mm
- Ironing was carried out under the conditions described above to prepare an aluminum drawn ironed can body coated with a polyester resin on the inner surface of the can. The following evaluation was performed using this drawn and ironed can body.
- the puncture resistance was evaluated using the puncture strength measurement method for the can body side wall described below.
- internal pressure can be applied to can opening 32 by air as shown in Fig.4.
- the device 33 was set, and an internal pressure of 190 kPa equivalent to the internal pressure of the beer can was applied.
- the piercing needle 35 is attached to the compression tester 34, and the piercing needle 35 is located at the position where the thickness of the wall on the can body side is thinnest in the can height direction (in the embodiment, a position 60 mm from the bottom of the can).
- the test can 31 was set, and the puncture strength of the side wall of the can body was measured.
- the radius of the tip of the piercing needle 35 was 2.25 mm, and the descending speed of the piercing needle 35 was 200 mm / min.
- the relationship between the state of crushing and the piercing strength during distribution at the level of 1 million cans was as follows. A can body with a piercing strength of less than 88N will break, and a can body with a piercing strength of 88N or more will not break. However, even if the piercing strength is 88N or more, if the piercing strength is 88N or more and less than 92N, a part of the can body that has been dented at the time of distribution but has been dented on an aluminum plate There was a minute crack that was the starting point of
- the tensile test piece for measuring the tensile strength s is placed at the thinnest position (Tw) in the can body side wall thickness (Tw) in the can height direction (in the example, at a position 60 mm from the can bottom). Then, the cutting direction was cut out so that the stretching direction was the can axis direction (can height direction). The plate thickness was measured with a micrometer. The tensile test speed was set at lmm / min.
- the presence of oriented crystals in a resin film can be determined by X-ray diffraction measurement.
- X-ray diffraction intensity of the (100) plane is measured.
- the X-ray diffraction intensity of one 105) plane was measured.
- the C axis is in the direction of the molecular chain, and the C axis is aligned in the height direction of the can by ironing of the can body.
- the (100) plane containing the benzene ring is parallel to the resin film surface, and by measuring the state of the (100) plane, the state of the plane-oriented crystal can be known. .
- the thinnest position (60 mm from the bottom of the can in the example) of the can wall was cut out in the height direction of the can and set on an X-ray diffractometer by a reflection method.
- the incident angle ⁇ and the reflection angle ⁇ were made symmetrical with respect to the normal to the film surface.
- the diffraction angle 2 ⁇ ⁇ was scanned at a rate of 2 ° / min between 2030 ° and the following X-ray Under the diffraction conditions, an X-ray diffraction intensity curve was obtained with the horizontal axis representing the diffraction angle and the vertical axis representing the X-ray diffraction intensity.
- the X-ray diffraction conditions at this time were as follows. X-ray diffraction intensity curve was obtained by setting the target: Cu, the tube voltage was 30 kV, the tube current was 100 mA, the divergence slit was 0.5 °, and the detection slit was 0.15 mm.
- a diffraction peak at (110 plane) was observed at about 22.5 ° at a diffraction angle of 2 °, and a diffraction peak at (100 plane) was observed at about 26 ° at a diffraction angle of 2 °.
- the value of (100) face peak intensity / (110) face peak intensity obtained from the can coated with the polyester resin was obtained from the same polyester resin having a spherulite structure without orientation ( If the peak intensity of the 100) plane is larger than the peak intensity of the Z (110) plane, it can be determined that the polyester resin crystals are plane-oriented parallel to the film plane.
- the X-ray diffraction angle of 2 ° was set to the diffraction angle of 42.9 degrees for the (-105) plane of the PET polyester resin.
- the polyester resin film is rotated 0-360 degrees at a rate of 0.5 degrees / second with the film normal on the X-ray diffraction measurement plane as the axis, and the horizontal axis is the rotation angle and the vertical axis is the X-ray rotation under the following X-ray diffraction conditions.
- An X-ray diffraction intensity curve was obtained as the folding intensity.
- the rotation angles 0 and 180 degrees corresponded to the circumferential direction of the can, 90 degrees corresponded to the can bottom direction, and 270 degrees corresponded to the can height direction.
- the X-ray diffraction conditions at this time were set as follows, and an X-ray diffraction intensity curve was obtained, which was used as a background.
- the parameter ⁇ is 0.5 or more.
- an aluminum drum having a polyester resin layer provided on the inner surface and / or outer surface of the can is a seamless can body that has no broken cylinder during distribution.
- the resin layer contains oriented crystals
- the parameter indicating the degree of axial orientation of the oriented crystals of the polyester resin layer in the can height direction is ⁇ 0.5
- the heat of fusion ( ⁇ ) of the polyester resin layer is 15 j /
- the heat of fusion represents the total crystallinity of the resin
- the parameter H represents the crystallized one that is oriented in the can axis direction.
- the heat of fusion (A) shown in Fig. 8 was measured for cans coated with polyester resin. Cut out the thinnest position of the can wall plate in the height direction (in the example, the position 60 mm from the bottom of the can), immerse in dilute hydrochloric acid to dissolve the aluminum, take out the polyester film, rinse with water, dry, and The temperature was raised at a rate of 20 ° C / min using a scanning calorimeter (DSC), and the heat of fusion was measured (see Fig. 9).
- DSC scanning calorimeter
- An aluminum plate having a thickness of 0.3 mm was used as a substrate.
- the composition of the substrate is as follows: Mn: l.l% by weight, Mg: l.1% by weight, ⁇ 1: 0.19 ft%, Si: 0.30% by weight, Fe: 0.43% by weight, balance A1 there were.
- the surface of this substrate is subjected to a chromic acid phosphate treatment in which the amount of chromium is reduced to 20 mg / m 2 in terms of metallic chromium, and one surface of the substrate is polyethylene terephthalate containing 10 mol% of isophthalic acid as a copolymerization component.
- An unstretched film (5 zm thick) of Z isophthalate (PET / IA) copolymer resin was laminated on the surface corresponding to the inner surface of the can at a temperature of 250 ° C to produce a thermoplastic resin-coated aluminum plate.
- thermoplastic resin-coated aluminum plate obtained as described above is punched into a disk shape, and then drawn and ironed by a conventional method so as to have a plate thickness as shown in Table 1, and trimmed at the opening end ears. Then, after washing and drying the can body, printing on the outer surface, and baking at 200 ° C, a neck-in portion was formed to prepare a thermoplastic resin-coated can body having an inner capacity of 350 ml.
- An aluminum plate having a thickness of 0.28 mm was used as a substrate.
- the surface of this substrate is subjected to a chromic acid phosphate treatment in which the amount of chromium is 20 mg / m 2 in terms of chromium metal,
- PETZIA polyethylene terephthalate / isophthalate
- thermoplastic resin-coated aluminum plate was manufactured under the same conditions as in Example 1.
- the thermoplastic resin-coated aluminum plate obtained as described above was punched into a disk shape, and then drawn and ironed so as to have a plate thickness as shown in Table 1, and trimming of the opening end lugs. After heat treatment at ° C, external printing, and baking at 200 ° C, a neck-in A 350 ml thermoplastic resin coated can was produced.
- An aluminum plate having a thickness of 0.25 mm was used as a substrate.
- PET / IA polyethylene terephthalate / isophthalate copolymer resin film with a thickness of 40 zm on the inner surface and a thickness of 16 ⁇ m on the outer surface of the can was laminated on the surface of this substrate. . Except for the above, a thermoplastic resin-coated aluminum plate was manufactured under the same conditions as in Example 2.
- thermoplastic resin-coated aluminum plate obtained as described above was punched into a disk shape, and then a can was produced under the same conditions as in Example 2 so as to have a plate thickness as shown in Table 1.
- PET / IA polyethylene terephthalate / isophthalate copolymer resin film with a thickness of 32 ⁇ m on the inner surface and a thickness of 11 ⁇ m on the outer surface of the can is laminated on the surface of this substrate. did.
- This copolymer resin film had an isophthalic acid content of 30 mol%. Except for the above, a thermoplastic resin-coated aluminum plate was manufactured under the same conditions as in Example 3.
- thermoplastic resin-coated aluminum plate obtained as described above was punched into a disk shape, and then a can was produced under the same conditions as in Example 2 so as to have a plate thickness as shown in Table 1.
- composition of the substrate is as follows: Mn: 0.4% by weight, Mg: 4.6% by weight, Cu: 0.04% by weight, Si: 0.12% by weight, 6: 0.25% by weight, the balance being A1 Was used.
- a polyethylene terephthalate / isophthalate (PETZIA) copolymer resin finolem having a thickness corresponding to the inner surface of the can of 32 / m and a thickness corresponding to the outer surface of the can of 32 ⁇ m was laminated on the surface.
- PETZIA polyethylene terephthalate / isophthalate
- thermoplastic resin-coated aluminum plate was manufactured under the same conditions as in Example 2.
- the thermoplastic resin-coated aluminum plate obtained as above is punched into a disk shape, then drawn and ironed to a thickness as shown in Table 1, and after trimming at 200 ° C. After heat treatment, external printing and baking at 200 ° C., a neck-in portion was formed to prepare a thermoplastic resin-coated aluminum can having a capacity of 500 ml. (Example 6)
- An aluminum plate having a thickness of 0.25 mm was used as a substrate.
- a polyethylene terephthalate Z isophthalate (PET / IA) copolymer resin film with a thickness of 16 / m on the surface corresponding to the inner surface of the can and a thickness of 16 ⁇ m on the surface of the substrate corresponding to the outer surface of the can was laminated. Except for the above, a thermoplastic resin-coated aluminum plate was manufactured under the same conditions as in Example 5.
- thermoplastic resin-coated aluminum plate obtained as described above was punched into a disk shape, and then a can was produced under the same conditions as in Example 2 so as to have a plate thickness as shown in Table 1.
- An aluminum plate was used as a substrate.
- PET / IA polyethylene terephthalate Z isophthalate copolymer resin film with a thickness of 16 zm on the inner surface and a thickness of 32 ⁇ m on the outer surface of the can was coated on the surface of this substrate. Laminated.
- This copolymer resin film had an isophthalic acid content of 30 mol%.
- thermoplastic resin-coated aluminum plate was manufactured under the same conditions as in Example 6.
- the thermoplastic resin-coated aluminum plate obtained as described above was punched into a disk shape, and then a can was produced under the same conditions as in Example 2 so as to have a plate thickness as shown in Table 1.
- An aluminum plate having a thickness of 0.25 mm was used as a substrate.
- the composition of the substrate Mn: 0. 5 weight 0/0, Mg: 5. 0 wt%, Cu: 0. 05 wt%, Si: 0. 10 by weight 0/0, Fe: 0. 29% by weight, The remainder used an aluminum plate of A1.
- PET / IA polyethylene terephthalate Z isophthalate copolymer resin film with a thickness of 16 zm on the inner surface and a thickness of 5 ⁇ m on the outer surface of the can is laminated on the surface of this substrate. did.
- thermoplastic resin-coated aluminum plate was manufactured under the same conditions as in Example 2.
- the thermoplastic resin-coated aluminum plate obtained as described above was punched into a disk shape, and then a can was produced under the same conditions as in Example 2 so as to have a plate thickness as shown in Table 1.
- Example 9 An aluminum plate having a thickness of 0.28 mm was used as a substrate.
- composition of the substrate ⁇ : 1 ⁇ l wt%, Mg: l ⁇ 1 wt%, 01: 0. 19fifi%, Si: 0. 30 by weight 0/0, Fe: 0. 43 wt%, the balance being A1 Was used.
- This aluminum plate was punched into a disk shape, and then drawn and ironed to a thickness as shown in Table 1.
- thermosetting paint After trimming, washing and drying the can, spraying a thermosetting paint on the inner surface and baking it at 200 ° C, then apply a urethane-based adhesive to the side that adheres to the can to a thickness of 50 ⁇ m.
- a polyethylene film was thermocompression-bonded to the outer surface of the can, and the entire outer surface of the can was covered with a polyethylene film, and then a neck-in portion was formed to produce a thermoplastic resin-coated can.
- An aluminum plate was used as a substrate.
- An unstretched resin film having a thickness of 5 ⁇ m was laminated on both sides of the substrate.
- a PET / NDC copolymer resin containing 8 mol% of naphthalenedicarboxylic acid was used as a copolymer component of the resin film.
- thermoplastic resin-coated aluminum plate was manufactured under the same conditions as in Example 2.
- the thermoplastic resin-coated aluminum plate obtained as described above was punched into a disk shape, and then a can was produced under the same conditions as in Example 2 so as to have a plate thickness as shown in Table 1.
- An aluminum plate was used as a substrate.
- thermoplastic resin-coated aluminum plate was manufactured under the same conditions as in Example 2.
- the thermoplastic resin-coated aluminum plate obtained as described above was punched into a disk shape, and then a can was produced under the same conditions as in Example 2 so as to have a plate thickness as shown in Table 1.
- Example 12 An aluminum plate was used as a substrate.
- thermoplastic resin-coated aluminum plate was manufactured under the same conditions as in Example 2.
- the thermoplastic resin-coated aluminum plate obtained as described above was punched into a disk shape, and then a can was produced under the same conditions as in Example 2 so as to have a plate thickness as shown in Table 1.
- An aluminum plate was used as a substrate.
- the surface layer of the unstretched film had a naphthalene dicarboxylic acid content of 3 mol% as a copolymer component of polyethylene terephthalate and a thickness of 5 ⁇ m.
- the lower layer of the unstretched film had a naphthalene dicarboxylic acid content of 8 mol% as a copolymer component of polyethylene terephthalate and a thickness of 5 ⁇ m.
- the surface layer of the unstretched film had a naphthalene dicarboxylic acid content of 5 mol% as a copolymer component of polyethylene terephthalate and a thickness of 5 ⁇ m.
- the lower layer of the unstretched film had a naphthalene dicarboxylic acid content of 10 mol% as a copolymer component of polyethylene terephthalate and a thickness of 5 ⁇ m.
- thermoplastic resin-coated aluminum plate was manufactured under the same conditions as in Example 2.
- the thermoplastic resin-coated aluminum plate obtained as described above was punched into a disk shape, and then a can was produced under the same conditions as in Example 2 so as to have a plate thickness as shown in Table 1.
- An aluminum plate was used as a substrate.
- the following three-layer copolymerized white resin film was laminated on both sides of the substrate.
- the surface layer of the unstretched film had an isophthalic acid content of 5 mol% as a copolymer component of polyethylene terephthalate and a thickness of 5 ⁇ m .
- An intermediate layer of an unstretched film the amount of isophthalic acid within 5 mole 0/0 polyethylene terephthalate over preparative copolymer resin is, titanium oxide is contained 30% by weight, the film thickness and 20 zm.
- the amount of isophthalic acid is polyethylene terephthalate over preparative copolymer resin is 15 mol 0/0, the titanium oxide is contained 5 wt%, and the thickness and 5 zm.
- thermoplastic resin-coated aluminum plate was manufactured under the same conditions as in Example 2.
- the thermoplastic resin-coated aluminum plate obtained as described above was punched into a disk shape, and then a can was produced under the same conditions as in Example 2 so as to have a plate thickness as shown in Table 1.
- An aluminum plate was used as a substrate.
- the surface layer of the unstretched film had a naphthalene dicarboxylic acid content of 3 mol% as a copolymer component of polyethylene terephthalate and a film thickness of 20 ⁇ m.
- the lower layer of the non-stretched film had an isophthalic acid content of 12 mol% as a copolymer component of polyethylene terephthalate and a thickness of 30 ⁇ m.
- the surface layer of the unstretched film, the isophthalic acid content was 5 mol 0/0 as a copolymer component of the polyethylene terephthalate, the film thickness and 15 mu m.
- the lower layer of the unstretched film had a naphthalene dicarboxylic acid content of 10 mol% as a copolymer component of polyethylene terephthalate and a film thickness of 25 ⁇ m.
- thermoplastic resin-coated aluminum plate was manufactured under the same conditions as in Example 2.
- the thermoplastic resin-coated aluminum plate obtained as described above was punched into a disk shape, and then a can was produced under the same conditions as in Example 2 so as to have a plate thickness as shown in Table 1.
- Example 16 An aluminum plate was used as a substrate.
- the surface layer of the unstretched film was a polyethylene terephthalate copolymer resin having a thickness of 3 ⁇ m and an isophthalic acid content of 5 mol%.
- the intermediate layer, the film thickness and 8 mu m, a polyethylene terephthalate over preparative copolymer resin amount isophthalic acid is 5 mol 0/0, the ionomer resin 18 wt%, one containing the Tokofuweroru 0.5 wt% And
- the amount of isophthalic acid in the polyethylene terephthalate over preparative copolymer resin is 15 mol 0/0, the ionomer resin 18 wt%, was obtained by containing 1% of tocopherol.
- copolymer resin film was laminated on the surface of the substrate corresponding to the outer surface of the can.
- Weight isophthalic acid and 10 motor Honoré 0/0 as polyethylene terephthalate copolymer component of the non-stretched film was the film thickness and 16 / im.
- thermoplastic resin-coated aluminum plate was manufactured under the same conditions as in Example 2.
- the thermoplastic resin-coated aluminum plate obtained as described above was punched into a disk shape, and then a can was produced under the same conditions as in Example 2 so as to have a plate thickness as shown in Table 1. (Example 17)
- An aluminum plate was used as a substrate.
- the surface layer of the unstretched film was a polyethylene terephthalate copolymer resin having a thickness of 4 x m and an isophthalic acid content of 5 mol%.
- the amount of isophthalic acid in the polyethylene terephthalate over preparative copolymer resin is 15 mol 0/0, the PBT resin 34 wt%, was obtained by containing Orefin 15%.
- a copolymer resin film having the following two-layer structure was laminated on the surface corresponding to the outer surface of the can of this substrate. The surface layer of the unstretched film, the isophthalic acid content was 5 mol 0/0 as polyethylene terephthalate copolymer component, and a 3 mu m thickness.
- the lower layer the amount of isophthalic acid and 15 mole 0/0 as polyethylene terephthalate copolymer component was the film thickness 5 mu m.
- thermoplastic resin-coated aluminum plate was manufactured under the same conditions as in Example 2.
- the thermoplastic resin-coated aluminum plate obtained as described above was punched into a disk shape, and then a can was produced under the same conditions as in Example 2 so as to have a plate thickness as shown in Table 1.
- An aluminum plate was used as a substrate.
- the following copolymer resin film was laminated on the surface of the substrate corresponding to the inner surface of the can.
- the film for the inner surface of the can is a biaxially stretched copolymer resin film with a film thickness of 16 ⁇ m and a polyethylene terephthalate copolymer resin with an isophthalic acid content of 5 mol% containing 30 wt% of PBT resin. was used.
- copolymer resin film was laminated on the surface of the substrate corresponding to the outer surface of the can.
- a biaxially stretched copolymer resin film of polyethylene terephthalate copolymer having a thickness of 16 ⁇ m and an isophthalic acid content of 12 mol% was used.
- the metal plate temperature during lamination was 280 ° C.
- thermoplastic resin-coated aluminum plate was manufactured under the same conditions as in Example 2.
- the thermoplastic resin-coated aluminum plate obtained as described above was punched into a disk shape, and then a can was produced under the same conditions as in Example 2 so as to have a plate thickness as shown in Table 1.
- An aluminum plate was used as a substrate.
- copolymer resin films were laminated on both sides of this substrate.
- a biaxially stretched copolymer resin film of polyethylene terephthalate copolymer having a film thickness of 16 zm and an isophthalic acid content of 12 mol% was used.
- the metal plate temperature during lamination was 270 ° C.
- thermoplastic resin-coated aluminum plate was manufactured under the same conditions as in Example 2.
- the thermoplastic resin-coated aluminum plate obtained as described above was punched into a disk shape, and then a can was produced under the same conditions as in Example 2 so as to have a plate thickness as shown in Table 1.
- An aluminum plate was used as a substrate.
- copolymer resin films were laminated on both sides of this substrate.
- thermoplastic resin-coated aluminum plate was manufactured under the same conditions as in Example 2.
- the thermoplastic resin-coated aluminum plate obtained as described above was punched into a disk shape, and then a can was produced under the same conditions as in Example 2 so as to have a plate thickness as shown in Table 1.
- Example 1-20 For the can body of Example 1-20 prepared as described above, measurement of the aluminum plate thickness of the can body side wall portion, measurement of the tensile strength at break in the can circumferential direction of the aluminum plate on the can body side wall portion (can body side wall portion circumference) Direction aluminum tensile strength), measurement of can body side wall thickness (including thermoplastic resin) t, measurement of can body side wall can height direction tensile strength (including thermoplastic resin) s, orientation crystal of thermoplastic resin layer Measurement,
- the composition forces the aluminum plate Mn: 0. 8 wt 0/0, Mg: 0. 8 wt 0/0, Cu: 0. 19 weight 0/0, Si: 0. 29 wt%, 6: 0. 50 wt% An aluminum plate having a balance of A1 was used.
- the thickness of the polyethylene terephthalate / isophthalate (PET / IA) copolymer resin film laminated on this aluminum plate was 5 zm on the surface corresponding to the inner surface of the can and 5 mm on the surface corresponding to the outer surface of the can. It was 16 ⁇ m.
- Example 2 Except for the above, a plate was produced under the same conditions as in Example 2. A can was produced from this plate under the same conditions as in Example 2 so as to have a plate thickness as shown in Table 1. (Comparative Example 2)
- An aluminum plate having a thickness of 0.25 mm was used.
- the thickness of the polyethylene terephthalate / isophthalate (PET / IA) copolymer resin film laminated on the aluminum plate was set to 32 ⁇ m for the inner surface of the can and 16 ⁇ m for the outer surface of the can. .
- a can was produced from this plate under the same conditions as in Example 2 so as to have a plate thickness as shown in Table 1.
- the thickness of the polyethylene terephthalate / isophthalate (PETZTZ) copolymer resin film laminated on the aluminum plate was 16 x m on the surface corresponding to the inner surface of the can and 5 x m on the surface corresponding to the outer surface of the can. Except for the above, a plate was produced under the same conditions as in Example 4. A can was produced under the same conditions as in Example 2 so that this plate had a thickness as shown in Table 1.
- PETZTZ polyethylene terephthalate / isophthalate
- An aluminum plate having a thickness of 0.28 mm was used.
- the composition of the aluminum plate is as follows: Mn: 1.1 wt%, Mg: 1.1 wt%, Cu: 0.19 wt%, Si: 0.30 wt%, Fe: 0.43 wt%, and the balance is A1.
- the aluminum plate was punched into a disk shape, and then drawn and ironed to a thickness as shown in Table 1. Trimming, washing of the can body, drying and printing on the outer surface, spraying a thermosetting coating on the inner surface side and baking at 200 ° C, then forming a neck-in part to produce a can body.
- Example 9 An aluminum plate having a thickness of 0.25 mm was used. Except for the above, a plate was produced under the same conditions as in Example 9. This plate was drawn and ironed to a thickness as shown in Table 1. After trimming, washing and drying of the can, spraying a thermosetting paint on the inner surface and baking at 200 ° C, the urethane-based adhesive was applied on the side to be bonded to the can to a film thickness of 50 ⁇ m. m polyethylene film was thermocompression-bonded to the outer surface of the can, the entire outer surface of the can was covered with a polyethylene film, and then a neck-in portion was formed to produce a thermoplastic resin-coated can body.
- Composition Mn: 0.5% by weight, Mg: 5.3% by weight, Cu: 0.10% by weight, Si: 0.15% by weight , Fe: 0. 33 weight 0/0, and the balance was used an aluminum plate is Al.
- Example 2 Except for the above, a plate was produced under the same conditions as in Example 2. A can was produced from this plate under the same conditions as in Example 2 so as to have a plate thickness as shown in Table 1.
- the isophthalic acid content of the polyethylene terephthalate Z isophthalate (PETZIA) copolymer resin film was 30 mol%, the film thickness was 10 xm on the surface corresponding to the inner surface of the can, and 8 xm on the surface corresponding to the outer surface of the can. .
- Example 3 a plate was produced under the same conditions as in Example 3, and a can was produced under the same conditions as in Example 2 so as to have a plate thickness as shown in Table 1.
- a plate was produced under the same conditions as in Example 11, the plate was punched into a disk shape, and then drawn and ironed to a plate thickness as shown in Table 1. After trimming the open end ears, a heat treatment at 250 ° C. was performed to make the resin coating amorphous. After printing on the outer surface and baking at 200 ° C, a neck-in portion was formed, and a thermoplastic resin-coated can body having an inner capacity of 350 ml was produced.
- Measurement of the aluminum thickness of the side wall of the can body measurement of the tensile strength at break in the circumferential direction of the aluminum plate on the side wall of the can body (tensile strength of aluminum in the circumferential direction of the side wall of the can body), thickness of the side wall of the can body (thermoplastic resin) Measurement of t, tensile strength (including thermoplastic resin) s in the can height direction of the can body side wall, measurement of oriented crystal of the thermoplastic resin layer, and evaluation of the rate of flange cracking when filling the contents Was. The results are shown in Table 1 and Table 3.
- Example 1 350ml 0.1 10 301 0.1 12 304 34
- Example 2 350ml 0.105 310 0.1 17 282 33
- Example 3 350ml 0.095 315 0.1 16 275
- Example 4 350ml 0.097 314 0.1 14 264 30
- Example 5 500ml 0.104 410 0.128 352 45
- Example 6 350ml 0.080 410 0.090 377 34
- Example 7 350ml 0.075 407 0.089 336
- Example 8 350ml 0.095 448 0.103 417 43
- Example 9 350ml 0.103 309 0.153 203
- Example 10 350ml 0.095 310 0.098 325
- Example 1 350ml 0.105 313 0.1 17 282
- Example 12 350ml 0.106 313 0.1 18 296 35
- Example 13 350ml 0.107 308 0.1 15 323 37
- Example 14 350ml 0.104 309 0.126 253
- Example 15 350ml 0.105 307 0.139 238
- Example 16 350
- Thermoplastic organic resin type Film type Can body side wall e. Lyester
- Example 11 of the Present Invention The can body of Example 20 satisfies all the requirements of Claim 1 of the present invention, and the piercing strength obtained by measuring the piercing strength of the side wall of the can body was measured. However, it was 88N or more, and it was difficult to distribute it, and no rupture occurred (excellent crush resistance).
- the cans of Examples 4 and 7 had the parameter H and the heat of fusion of less than 0.5 and less than 15 JZ g, respectively, and the polyester resin was not oriented and crystallized.
- the piercing strength was 88N and 89N, respectively. Fine cracks were found in the aluminum plate.
- the can bodies of Examples 1, 3, 5, 6, 8, and 10-20 were those in which the polyester resin was oriented and crystallized, had a puncture strength of 92 N or more, and had dents on the can body during distribution. However, no microcracks occurred on the aluminum plate in the dented part, indicating that the crushing resistance was better.
- the can body of Example 9 is obtained by coating the outer surface of the can body with a thermoplastic resin film after the can body is formed, and has a force of tXs of 31.
- the piercing strength of the can body is 90N, Since there is no occurrence of breakage during distribution, it can be seen that, even if a thermoplastic resin film is coated after the can body is formed, satisfying claim 1 has excellent breakage resistance.
- the can body of Comparative Example 4 had a puncture strength of 77 N because no thermoplastic resin was present on any surface of the can body that satisfied the condition of t X s ⁇ 30 which is a requirement of the present invention. However, the collapse resistance in distribution was poor.
- the can body of Comparative Example 6 has a high piercing strength of 138 N because the circumferential tensile strength of the aluminum plate on the side wall of the can body, which is a requirement of the present invention, exceeds the requirement of 450 MPa or less. However, flange cracks at the time of filling occurred at a rate of 10 ppm.
- the tensile rupture strength s measured in the circumferential direction of the can body side wall aluminum plate, which is the base plate of the can body was regulated to 450 MPa or less, a can body without liquid leakage that does not cause flange cracking during filling can be used. , And can be supplied industrially stably.
- the weight can be reduced, which is advantageous for the beverage can distribution industry.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
- Laminated Bodies (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Wrappers (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04746220A EP1640277B1 (en) | 2003-06-23 | 2004-06-22 | Resin-coated aluminum seamless can body |
US10/561,913 US7968163B2 (en) | 2003-06-23 | 2004-06-22 | Resin-coated aluminum seamless can body featuring superior resistance against cracks in the can wall during distribution, and against flange cracking |
AU2004249586A AU2004249586A1 (en) | 2003-06-23 | 2004-06-22 | Resin-coated aluminum seamless can body having excellent body burst resistance and flange crack resistance in distribution |
JP2005507261A JP4775553B2 (ja) | 2003-06-23 | 2004-06-22 | 流通時の破胴耐性およびフランジクラック耐性に優れた樹脂被覆アルミニウム・シームレス缶体 |
KR1020057024388A KR101115587B1 (ko) | 2003-06-23 | 2005-12-19 | 유통시의 파동내성 및 플랜지크랙 내성이 우수한 수지피복알루미늄ㆍ시임리스 캔체 |
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WO2004113181A1 true WO2004113181A1 (ja) | 2004-12-29 |
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PCT/JP2004/008751 WO2004113181A1 (ja) | 2003-06-23 | 2004-06-22 | 流通時の破胴耐性およびフランジクラック耐性に優れた樹脂被覆アルミニウム・シームレス缶体 |
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US (1) | US7968163B2 (ja) |
EP (2) | EP2426057B1 (ja) |
JP (2) | JP4775553B2 (ja) |
KR (1) | KR101115587B1 (ja) |
CN (2) | CN101633418B (ja) |
AU (2) | AU2004249586A1 (ja) |
WO (1) | WO2004113181A1 (ja) |
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JP2006282195A (ja) * | 2005-03-31 | 2006-10-19 | Toyo Seikan Kaisha Ltd | 樹脂被覆金属缶及びその製造方法 |
WO2006123666A1 (ja) * | 2005-05-17 | 2006-11-23 | Toyo Seikan Kaisha, Ltd. | 3ピース角形缶及びその製造方法 |
JP2006320918A (ja) * | 2005-05-17 | 2006-11-30 | Toyo Seikan Kaisha Ltd | 3ピース角形缶及びその製造方法 |
JP2007275947A (ja) * | 2006-04-07 | 2007-10-25 | Daiwa Can Co Ltd | 樹脂被覆シームレス缶の製造方法および製造装置 |
JP2008073759A (ja) * | 2006-09-25 | 2008-04-03 | Toyo Seikan Kaisha Ltd | 樹脂被覆缶、及びその製造方法 |
JP2009208442A (ja) * | 2008-03-06 | 2009-09-17 | Toyo Seikan Kaisha Ltd | 樹脂被覆金属基材の製造方法 |
WO2011010508A1 (ja) | 2009-07-22 | 2011-01-27 | 東洋製罐株式会社 | アルミニウム製絞りしごき缶及びその製造方法 |
JP2015183718A (ja) * | 2014-03-20 | 2015-10-22 | 東洋製罐グループホールディングス株式会社 | 真空断熱材 |
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- 2004-06-22 EP EP04746220A patent/EP1640277B1/en not_active Expired - Lifetime
- 2004-06-22 AU AU2004249586A patent/AU2004249586A1/en not_active Abandoned
- 2004-06-22 US US10/561,913 patent/US7968163B2/en active Active
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Cited By (11)
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JP2006282195A (ja) * | 2005-03-31 | 2006-10-19 | Toyo Seikan Kaisha Ltd | 樹脂被覆金属缶及びその製造方法 |
WO2006123666A1 (ja) * | 2005-05-17 | 2006-11-23 | Toyo Seikan Kaisha, Ltd. | 3ピース角形缶及びその製造方法 |
JP2006320918A (ja) * | 2005-05-17 | 2006-11-30 | Toyo Seikan Kaisha Ltd | 3ピース角形缶及びその製造方法 |
EP1886740A1 (en) * | 2005-05-17 | 2008-02-13 | Toyo Seikan Kaisha, Ltd. | Three-piece square can and method of manufacturing the same |
EP1886740A4 (en) * | 2005-05-17 | 2012-09-26 | Toyo Seikan Kaisha Ltd | SQUARE METAL BOX IN THREE PARTS AND METHOD FOR MANUFACTURING THE SAME |
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JP2009208442A (ja) * | 2008-03-06 | 2009-09-17 | Toyo Seikan Kaisha Ltd | 樹脂被覆金属基材の製造方法 |
WO2011010508A1 (ja) | 2009-07-22 | 2011-01-27 | 東洋製罐株式会社 | アルミニウム製絞りしごき缶及びその製造方法 |
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JP2015183718A (ja) * | 2014-03-20 | 2015-10-22 | 東洋製罐グループホールディングス株式会社 | 真空断熱材 |
Also Published As
Publication number | Publication date |
---|---|
EP1640277B1 (en) | 2012-08-22 |
AU2009208113A1 (en) | 2009-09-03 |
US20070218226A1 (en) | 2007-09-20 |
JPWO2004113181A1 (ja) | 2006-07-27 |
EP2426057A1 (en) | 2012-03-07 |
EP1640277A1 (en) | 2006-03-29 |
AU2004249586A1 (en) | 2004-12-29 |
CN1809498A (zh) | 2006-07-26 |
CN100545045C (zh) | 2009-09-30 |
CN101633418B (zh) | 2014-06-18 |
KR101115587B1 (ko) | 2012-03-05 |
US7968163B2 (en) | 2011-06-28 |
CN101633418A (zh) | 2010-01-27 |
EP1640277A4 (en) | 2009-09-16 |
JP2011161930A (ja) | 2011-08-25 |
EP2426057B1 (en) | 2013-02-20 |
KR20060021906A (ko) | 2006-03-08 |
JP4775553B2 (ja) | 2011-09-21 |
JP5534354B2 (ja) | 2014-06-25 |
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