WO2006008913A1 - 樹脂被覆アルミニウム合金板およびそれを用いた缶蓋 - Google Patents
樹脂被覆アルミニウム合金板およびそれを用いた缶蓋 Download PDFInfo
- Publication number
- WO2006008913A1 WO2006008913A1 PCT/JP2005/011710 JP2005011710W WO2006008913A1 WO 2006008913 A1 WO2006008913 A1 WO 2006008913A1 JP 2005011710 W JP2005011710 W JP 2005011710W WO 2006008913 A1 WO2006008913 A1 WO 2006008913A1
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- WIPO (PCT)
- Prior art keywords
- resin
- aluminum alloy
- alloy sheet
- polyolefin
- coated aluminum
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
- B05D7/16—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies using synthetic lacquers or varnishes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- 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
- B32B15/08—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 of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
- B65D2517/0001—Details
- B65D2517/0058—Other details of container end panel
- B65D2517/008—Materials of container end panel
- B65D2517/0082—Coated or laminated metal
Definitions
- Resin-coated aluminum alloy plate and can lid using the same
- the present invention relates to a resin-coated aluminum alloy plate, and more particularly to a resin-coated aluminum alloy plate used for a can lid that can be opened by hand (ie, open end or EOE), and a can lid using the same.
- EOE easy open end
- can lid (hereinafter referred to as EOE) is attached.
- EOEs used a metal plate such as an aluminum alloy coated with paint.
- resin coating instead of coating resin.
- Metal plate force 3 ⁇ 4 OE has come to be used.
- Examples of the application of a resin-coated aluminum alloy plate to a can material include the following.
- Patent Document 1 discloses a thermoplastic resin coating in which an aluminum alloy plate subjected to surface treatment such as silane treatment or alumite treatment and silane treatment is covered with a thermoplastic resin such as polyester resin.
- An aluminum alloy plate is disclosed, and it is described that polyethylene, polypropylene, and the like are selected and used as a thermoplastic resin depending on the application.
- thermoplastic resin-coated aluminum alloy sheet described in this publication includes a drawn iron can, a can subjected to a stretch process after drawing calorie, a can subjected to a stretch force test after drawing and further subjected to a ironing process
- a drawn iron can a can subjected to a stretch process after drawing calorie
- a stretch force test after drawing a can subjected to a stretch force test after drawing and further subjected to a ironing process
- it is intended to be applied to applications that require processing, particularly where film adhesion is required, and is not intended to be applied to can lids. Therefore, it is related to the opening characteristics when applied to a can lid, that is, the characteristics that can be opened without tearing the V-shaped score processed part and opening the resin on the opening end face (feathering). Therefore, a stable opening property that is not always good cannot be obtained.
- Patent Document 2 is an example in which a resin-coated metal plate is used as an EOE. After a synthetic resin film is bonded to a metal thin plate constituting a laminated can lid, a large number of micropores are formed in the synthetic resin film layer. Discloses a method for preventing the formation of angel hair, which is a type of feathering, by making a hole easy to break.
- a can lid by this method is used for a can, if the can falls and deforms due to a high force, cracks occur in the micropores, the metal plate surface is exposed to the atmosphere, and the metal part is exposed. May corrode.
- polyester resin or polyester resin is applied to an aluminum alloy plate having an average diameter of 50 to 3000 nm and a maximum depth of lOOOnm or less, and an occupation area ratio of 10 to 90%.
- a thermoplastic resin coated aluminum alloy sheet formed by coating polycarbonate resin is proposed.
- thermoplastic resin-coated aluminum alloy sheet described in this publication is a stringent can such as a squeezed and ironed can, a can that has been stretched after squeezing caloring, a can that has been subjected to a stretching force after squeezing, and is further subjected to squeezing. It is intended to be applied to applications where processing has been applied, and particularly where coating adhesion is required, and is not intended to be applied to can lids.
- Patent Document 1 International Publication No. WO98Z51840
- Patent Document 2 JP 2002-254557 A
- Patent Document 3 Japanese Patent Application Laid-Open No. 09-226052
- An object of the present invention is to provide a resin-coated aluminum alloy plate applied to a can lid having a stable opening property and anti-fusing property, and a can lid using the same. Means for solving the problem
- the resin-coated aluminum alloy sheet of the present invention is a resin-coated aluminum alloy sheet formed by coating a multilayer resin containing polyolefin resin on at least one side (claim) Item 1), or
- Polyolefin is applied to at least one side of the aluminum alloy plate that has been anodized.
- the resin-coated aluminum alloy sheet according to claim 1 has fine holes with an average diameter of 50 to 3000 nm and a maximum depth of lOOOnm or less on the surface, and the occupied area ratio of the fine holes is 10 to 90%. (Claim 4), and
- micropores are formed with an average diameter of 200 to 900 nm and a depth shallower than 1Z2 having a diameter (Claim 5).
- the multilayer resin containing the polyolefin resin comprises an upper layer of an alicyclic polyolefin resin and a lower layer of a modified polyolefin resin. It is a two-layered resin (Claim 6), or
- the multilayer resin containing the polyolefin resin is a two-layer resin consisting of an upper layer composed of a blended resin of an alicyclic polyolefin resin and a chain polyolefin resin and a lower layer of a modified polyolefin resin.
- the multilayered resin layer containing the polyolefin resin comprises an upper layer of an alicyclic polyolefin resin, an intermediate layer made of a blended resin of an alicyclic polyolefin resin and a chain polyolefin resin, and a lower layer of a modified polyolefin resin.
- a multilayer resin containing the polyolefin resin comprises an upper layer composed of a blended resin of polyester resin and polyolefin resin, and a lower layer of copolymerized polyester resin 2 It is layered resin (claim 9), or
- the multilayered resin containing the polyolefin resin is a two-layered resin composed of an upper layer of a polyester resin and a lower layer made of a blended resin resin of polyester resin and polyolefin resin (Claim 10), or
- the multilayer resin containing the polyolefin resin is a three-layer resin comprising an upper layer of a polyester resin, an intermediate layer made of a blended resin of polyester resin and a polyolefin resin, and a lower layer of a copolymerized polyester resin.
- the can lid of the present invention is a can lid (claim 12) using the resin film-coated aluminum alloy plate of the above (claims 1 to L1).
- the resin-coated aluminum alloy plate of the present invention is an aluminum alloy plate in which a large number of micropores having a specific shape are formed on the surface, or a surface treatment such as alumite treatment or a further silane treatment after the alumite treatment.
- it is coated with a multi-layered resin containing polyolefin resin, especially when used on can lids that can be opened by hand (easy open end or EOE). There is little effect on the flavor of the contents of the fat layer. Therefore, it can be suitably applied as a material for EOE.
- alumite treatment or after applying alumite treatment, further silane treatment may be performed!
- a resin-coated aluminum alloy plate is made by coating a multilayered resin containing polyolefin resin on an aluminum alloy plate with a number of micro holes of specific shape formed on the surface. By using it, the opening property and the anti-feathering property can always be obtained in a good state. The contents of the present invention will be described below.
- polyester resin-coated metal sheet obtained by laminating and coating an aluminum alloy or tin-free steel with polyester resin as a material for EOE.
- Polyester resin is stretched in two directions in the vertical and horizontal directions, and then formed into a film in which the oriented crystalline state is heat-fixed, thereby exhibiting excellent properties such as strength, workability, and permeation resistance of liquids and gases.
- a polyester-coated metal plate with a biaxially stretched polyester film laminated on a metal plate is used as a can, the biaxially stretched polyester film is brought into contact with a metal plate heated to a temperature higher than the heat setting temperature of the biaxially stretched polyester film. Hot press.
- an adhesive may be interposed between the polyester film and the metal plate.
- the resin in the portion in contact with the metal plate loses its oriented crystal state and becomes amorphous, the tensile strength decreases, the elongation improves, and the workability increases.
- This amorphous portion increases as the time of contact with the metal plate where the heating temperature of the metal plate is high increases. Therefore, can applications where severe processing such as squeezed cans and squeezed iron cans are performed In the case of applying a polyester-coated metal sheet to this, it is possible to increase workability by increasing the amorphized portion.
- the multilayer resin containing polyolefin resin is subjected to an alumite treatment or a silane treatment after the alumite treatment.
- it can be applied as an EOE material that has excellent tearability and is less likely to cause feathering by being laminated and coated on an aluminum alloy plate having a large number of fine holes of a specific shape formed on the surface.
- multilayer resin containing polyolefin resin coated on the resin-coated aluminum alloy plate of the present invention multilayer resin obtained by laminating various polyolefin resins in two or three layers, or polyester resin Use a multi-layered resin in which two or three layers of a resin blended with a fat and an incompatible polyolefin resin and another polyester resin are laminated.
- the former multilayer resin is composed of an alicyclic polyolefin resin having poor adhesion to a metal plate as an upper layer, and a metal plate formed by graft polymerization of an unsaturated carboxylic acid or its anhydride to a chain-type polyolefin resin.
- the above modified polyolefin resin is a two-layer resin with a modified polyolefin resin having excellent adhesive properties as the lower film, or a blended resin obtained by blending an expensive alicyclic polyolefin resin with an inexpensive chain polyolefin resin as the upper layer.
- 2-layer grease with fat as lower layer film Or use an expensive alicyclic polyolefin resin as the alicyclic polyolefin resin as the upper layer, blended resin made of the above alicyclic polyolefin resin and chain-type polyolefin resin as the intermediate layer, and the modified polyolefin resin as the lower layer as the lower layer. It is preferable to have one of the three-layered resin with reduced amount.
- norbornene and alicyclic polyolefin resin used together with a chain-type polyolefin resin alone as an upper resin layer or as a blended resin of an upper layer or an intermediate layer.
- a chain-type polyolefin resin alone as an upper resin layer or as a blended resin of an upper layer or an intermediate layer.
- a polymer obtained by polymerizing the above using a ring-opening polymerization method and hydrogenating the obtained ring-opened polymer can be used.
- These alicyclic polyolefin resins preferably have a glass transition temperature of 100 ° C or higher.
- a glass transition temperature of 100 ° C or higher when an alicyclic polyolefin resin with a glass transition temperature of less than 100 ° C is used, when the film is formed on a film together with other resin layers, the film stretches and is immediately laminated and coated on an aluminum alloy plate to form EOE In addition, fuzzing tends to occur when opening, which is not preferable.
- Modified polyolefin resins used as the lower layer include low density polyethylene, medium density polyethylene, high density polyethylene, polypropylene, poly 1-butene, poly 4-methyl-1 pentene, or ethylene Z propylene copolymer and other ethylene.
- Random copolymers of ⁇ -olefins such as propylene, 1-butene, 4-methyl 1-pentene, or chain-type polyolefin resins such as block copolymers may include acrylic acid, methacrylic acid, maleic acid, So-called acid-modified polyolefins obtained by graft polymerization of unsaturated carboxylic acids such as fumaric acid and itaconic acid and their anhydrides in an amount of 2% or less can be used.
- the chain polyolefin resin used together with the alicyclic polyolefin resin as the blend resin of the upper layer or the intermediate layer includes low density polyethylene, medium density polyethylene, high density polyethylene, polypropylene, poly 1-butene, poly 4-methyl- 1 Random copolymers or blocks of ⁇ -olefins such as pentene or ethylene / propylene, including ethylene / propylene, 1-butene, 4-methyl-1 pentene It is preferable to use one of the chain-type polyolefin resins such as a copolymer.
- Blends of cycloaliphatic polyolefin resin and Kusarishiki polyolefin resin ⁇ is alicyclic polyolefin resin is 10 to 90 wt% in the blend ⁇ cycloaliphatic, acyclic polyolefin ⁇ force 90 to 10 weight 0/0 It is preferred that the blended fat is blended with! In this blend ⁇ , alicyclic polyolefin resin good openability is not obtained, et al is less than 10 wt%, the poor effect of film cost reduction to blend more than 90 weight 0/0 when chain polyolefin ⁇ . Further, in place of these chain-type polyolefin resins, ionomer resins or the above-mentioned acid-modified polyolefin resins may be blended with alicyclic polyolefin resins.
- the above alicyclic polyolefin resin, blended resin, and modified polyolefin resin pellets are heated and melted using a co-extruder capable of extruding multiple layers of resin film, and extruded from a T die force.
- a two-layer resin film or a three-layer resin film is formed.
- the two-layered resin film of the present invention thus obtained has a total thickness of the three-layered resin film in any of the upper-layer and lower-layer two-layer films and the upper-layer, intermediate-layer, and lower-layer three-layer films. It is preferably 10 to 50 ⁇ m.
- the thickness of the modified polyolefin resin in the lower layer should be 10-60% of the total thickness. preferable.
- the thickness of the resin is less than 10%, the adhesion between the resin film and the aluminum alloy plate will be insufficient, and the resin film will be easily peeled off at the opening outside the pull tab surrounded by the score groove. . On the other hand, even if it exceeds 60%, the effect of improving the adhesive strength is saturated, and it is not advantageous in terms of cost.
- the breaking elongation of the two-layer or three-layer resin film made of the above-described various polyolefin resin is 200% or less.
- Break elongation is less than 200%, especially in the temperature range of 0-100 ° C I prefer that.
- Cans filled with cold drinks such as juices and carbonated drinks are cooled to a temperature of o ° c or less before leaving for excursions, etc., and opened with the contents frozen at the destination. There is a case.
- cans filled with beverages such as sour flour and soup may open in a warmed state immersed in boiling water.
- the can lid since the can lid may open in the temperature range of 0 to 100 ° C, in order to prevent the occurrence of feathering in this temperature range, the elongation at break of the resin film for can lid is 0. ⁇ : It is preferable that it is 200% or less in the temperature range of LOO ° C.
- the upper layer is a polyester resin.
- the upper layer has a composition of any one of a polyester resin, an intermediate layer of a blended resin made of a polyester resin and a polyolefin resin, and a lower layer of a polyester resin.
- Blend ⁇ made of polyester ⁇ and polyolefin ⁇ used for ⁇ these two or three layers is 70-9 30-5 wt 5 wt 0/0 of polyester ⁇ 0/0 of polyolefin ⁇ Those obtained by blending are preferred. If the blended amount of the polyolefin resin is less than 5% by weight, sufficient tearability cannot be obtained. On the other hand, blending in excess of 30% by weight is preferable because the tensile strength of the resin film is significantly reduced.
- Polyester resin used as a two-layered resin and a blended resin of three-layered resin includes homopolymers such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, and polybasic constituents of these homopolymers.
- Polyolefin resin is inexpensive and widely used, and it is preferable to use any of polyethylene, polypropylene, and ethylene / propylene copolymers.
- the polyester resin used as the upper layer of the three-layered resin is used. It is preferable to use polyethylene terephthalate from the viewpoint of the ability to apply a polyester resin similar to an ester resin, excellent flavor properties, low cost, and ease of film formation.
- Polyester resin used as the upper or lower layer of the two-layered resin and as the lower layer of the three-layered resin includes homopolymers such as the above-mentioned polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, and homopolymers thereof.
- the copolyester ⁇ is not preferable to consist of ethylene isophthalate from the viewpoint of adhesiveness 75-90 mole% of E Ji terephthalate and 25 to 10 mole 0/0.
- polyester coffins may contain inorganic particles in order to improve tearability.
- the inorganic particles are preferably silicon oxide or titanium oxide having an average particle size of 0.2 to 5.0 m. If the average particle size is less than 0.2 m, the tearability will not be improved unless it is contained in a large amount in the resin, and if it is contained in the resin in a large amount, the adhesion of the resin to the aluminum alloy plate will deteriorate. . When the average particle size exceeds 5.0 m, the rivet workability and the workability of forming the convex portion are lowered, which is not preferable.
- these inorganic particles are preferably contained in a large amount in the case of fine particles and in a small amount in the case of coarse particles. Therefore, it is preferable to contain the inorganic particles in the polyester resin so as to satisfy the following formula, which is a product obtained by multiplying the average particle diameter and the content.
- the polyester resin containing inorganic particles thus obtained preferably has an elongation at break in a state of a single-layered resin film of 250% or less.
- the elongation at break exceeds 250%, it becomes difficult to break, and good tearability cannot be obtained.
- the blended resin comprising the above polyester resin and polyolefin resin, and selectively inorganic Polyester resin pellets containing carbon particles, or the above polyester resin, blend resin, and polyester resin pellets optionally containing inorganic particles can be extruded into multiple layers of resin film Using a co-extrusion machine, heat-dissolve, extrude ⁇ die, and form a two-layer resin film or a three-layer resin film.
- the total thickness of the two-layered resin film thus obtained is 10 to 50 ⁇ m
- the thickness of the blended resin is 7 to 40 m
- the polyester resin selectively containing inorganic particles is used.
- the thickness is preferably 3 to 10 ⁇ m.
- the total thickness is less than 10 m
- the contents may penetrate the resin film and corrode the coated aluminum alloy plate.
- it exceeds 50 m a large force is required for the opening, and feathering tends to occur.
- the thickness of the upper layer of the resin is less than 7 m, and the thickness of the polyester resin containing the inorganic particles selectively in the lower layer is smaller. If it is less than 3 ⁇ m, good tearability cannot be obtained.
- the upper limit is 10 m.
- the thickness of the three-layered resin film is 10 to 50 ⁇ m for the same reason as in the case of the two-layered resin film, and the upper polyester film provided for improving the flavor properties.
- the thickness of the fat is preferably 1 to 10 / ⁇ ⁇ .
- the thickness of the blended resin is 6 to 30 m, and the thickness of the polyester resin containing the inorganic particles selectively is 3 to: LO m. It is preferable to do.
- the substrate for coating the multilayer resin containing the polyolefin resin described above needs to have excellent adhesion, and an aluminum alloy plate with an alumite treatment on the surface, an alumite treatment,
- the surface shape having micropores formed by this treatment can be specified by measurement using an atomic force microscope or the like.
- the resin-coated aluminum alloy plate of the present invention is a multilayer resin containing the above polyolefin resin. It is obtained by laminating and coating the fat on at least one surface of the substrate having the above-mentioned aluminum alloy sheet strength.
- the multi-layer resin is a multi-layer resin in which various polyolefin-based resins are laminated in two or three layers, the modified polyolefin resin as the lower layer of the two or three layers is applied to a substrate made of an aluminum alloy plate. If the multilayer resin is a multilayer resin in which the polyester resin is blended with polyester resin and incompatible polyolefin resin and another polyester resin is laminated in two or three layers.
- a polyester resin that is a lower layer of two or three layers, or a blend resin made of a polyester resin and a polyolefin resin that is a lower layer of two layers is in contact with a substrate that also has an aluminum alloy sheet strength. Bond using thermal bonding. In order to increase the adhesive strength, heat bonding may be performed between the aluminum alloy plate and the multilayer resin via an adhesive.
- each resin pellet when each resin pellet is heated and melted by a co-extruder and co-extruded from a T-die, it may be directly extruded onto an aluminum alloy plate to be laminated.
- the can lid of the present invention is an aluminum-coated aluminum alloy plate obtained as described above, punched into a disc-shaped blank, and coated on one side or only one side of the aluminum alloy plate with aluminum.
- an alloy plate it is obtained by coating a resin film and engraving a score groove on the side surface.
- Multi-layered resins composed of various polyolefin resins include norbornene (shown as NRa in Table 2) and glass transition temperature of 135 ° C as cycloaliphatic polyolefin resins with a glass transition temperature of 100 ° C.
- the plane orientation coefficient of the polyester resin film was calculated from the refractive index in the plane direction (longitudinal direction, lateral direction) and thickness direction measured using an Abbe refractometer. The elongation of these formed resin films was measured with Tensilon.
- a multi-layered resin in which a polyester resin and a polyester resin mixed with an incompatible polyolefin resin and another polyester resin are laminated in two or three layers is a polyethylene terephthalate (in Tables 3 and 4).
- polyethylene Table 3, indicated by PE in 4
- polypropylene represented by PP in Table 3, 4
- E consisting of 60 mole 0/0 of ethylene and 40 mole 0/0 of propylene Chi Ren 'propylene copolymer
- Table 3 indicated by E ⁇ [rho in 4) 85 mole 0/0 of ethylene terephthalate and ethylene terephthalate comprising ethylene isophthalate 15 mole 0/0 containing Sani ⁇ containing tallates' ethylene isophthalate copolymer from (Table 3, indicated by ⁇ ⁇ ⁇ in 4), or ethylene terephthalate 85 mole 0/0 containing Sani ⁇ titanium and 15 mole 0/0 ethylene isophthalate Eth
- an alumite treatment was performed on the aluminum alloy plate CF IS: 5182 (thickness: 0.30 mm) under the following conditions.
- the aluminum alloy plate was anodized to give a multilayer resin-coated substrate indicated by A in the item of metal plate (type) in Table 5.
- silane coupling agent KBN903, manufactured by Shin-Etsu Chemical Co., Ltd.
- silane coupling agent KBN903, manufactured by Shin-Etsu Chemical Co., Ltd.
- water Z ethanol in 2Z1 solution at a concentration of 5%
- immersed in a solution heated to 30 ° C for 5 seconds to apply It was dried to obtain a multilayer resin-coated substrate indicated by B in the item of metal plate (type) in Table 5.
- a substrate coated with the formed multilayered resin is used as an aluminum alloy plate (JIS: 5182, thickness: 0.30 mm) with an alkaline aqueous solution under the following conditions. Treatment was followed by treatment with an aqueous acid solution.
- the multilayer resin films shown in Tables 2 to 4 are laminated on one side of these multilayer resin-coated substrates (metal plates) A to E using a thermal bonding method, and the resin coatings shown in Tables 5 to 6 are used.
- Aluminum alloy plates (sample numbers: 1 to 52) were prepared.
- Aluminum alloy sheets laminated and covered with a polyester resin film for comparison were prepared by changing the thermal bonding conditions and slightly lowering the orientation (sample numbers: 10 and 36).
- ⁇ Residue remaining in 2 or more and less than 5 out of 500.
- the can lid produced with the resin-coated aluminum alloy sheet strength of the present invention exhibits excellent feathering resistance.
- the resin-coated aluminum alloy sheet of the present invention is used as an EOE for a can lid, It is possible to open stably without generating a gap.
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Abstract
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Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2004215891A JP2006035509A (ja) | 2004-07-23 | 2004-07-23 | 樹脂被覆アルミニウム合金板およびそれを用いた缶蓋 |
JP2004215890A JP2006035508A (ja) | 2004-07-23 | 2004-07-23 | 樹脂被覆アルミニウム合金板およびそれを用いた缶蓋 |
JP2004-215890 | 2004-07-23 | ||
JP2004-215891 | 2004-07-23 |
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WO2006008913A1 true WO2006008913A1 (ja) | 2006-01-26 |
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JPH09226052A (ja) * | 1996-02-23 | 1997-09-02 | Toyo Kohan Co Ltd | 熱可塑性樹脂被覆アルミニウム合金板、その製造法及び製造装置 |
JPH1016127A (ja) * | 1996-07-05 | 1998-01-20 | Mitsubishi Plastics Ind Ltd | イージーオープン缶用蓋 |
JP2002347176A (ja) * | 2001-03-21 | 2002-12-04 | Toyo Kohan Co Ltd | 熱可塑性樹脂被覆金属板およびそれを用いた缶 |
JP2005014939A (ja) * | 2003-06-24 | 2005-01-20 | Toyo Kohan Co Ltd | 缶蓋用樹脂フィルム、および缶蓋用樹脂フィルムを被覆してなる缶蓋用樹脂フィルム被覆金属板、ならびにそれを用いた缶蓋 |
JP2005035674A (ja) * | 2003-07-01 | 2005-02-10 | Toyo Kohan Co Ltd | 缶蓋用樹脂フィルム、および缶蓋用樹脂フィルムを被覆してなる缶蓋用樹脂フィルム被覆金属板、ならびにそれを用いた缶蓋 |
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