WO2007020950A1 - 2ピース缶体用ラミネート鋼板およびラミネート鋼板製の2ピース缶体 - Google Patents
2ピース缶体用ラミネート鋼板およびラミネート鋼板製の2ピース缶体 Download PDFInfo
- Publication number
- WO2007020950A1 WO2007020950A1 PCT/JP2006/316121 JP2006316121W WO2007020950A1 WO 2007020950 A1 WO2007020950 A1 WO 2007020950A1 JP 2006316121 W JP2006316121 W JP 2006316121W WO 2007020950 A1 WO2007020950 A1 WO 2007020950A1
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- WIPO (PCT)
- Prior art keywords
- resin
- piece
- steel sheet
- radius
- laminated steel
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 38
- 239000010959 steel Substances 0.000 title claims abstract description 38
- 229920005989 resin Polymers 0.000 claims abstract description 84
- 239000011347 resin Substances 0.000 claims abstract description 84
- 238000004519 manufacturing process Methods 0.000 claims abstract description 23
- 229920001225 polyester resin Polymers 0.000 claims abstract description 17
- 239000004645 polyester resin Substances 0.000 claims abstract description 17
- 230000009477 glass transition Effects 0.000 claims abstract description 11
- 229910000576 Laminated steel Inorganic materials 0.000 claims description 50
- 239000010410 layer Substances 0.000 claims description 35
- -1 polyethylene Polymers 0.000 claims description 18
- 238000010030 laminating Methods 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 9
- 239000004743 Polypropylene Substances 0.000 claims description 7
- 229920000728 polyester Polymers 0.000 claims description 6
- 229920000554 ionomer Polymers 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 4
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 4
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 claims description 4
- 238000006116 polymerization reaction Methods 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920000098 polyolefin Polymers 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 58
- 239000000443 aerosol Substances 0.000 abstract description 10
- 238000000034 method Methods 0.000 description 45
- 238000010438 heat treatment Methods 0.000 description 14
- 239000000805 composite resin Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000011156 evaluation Methods 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- 229920001707 polybutylene terephthalate Polymers 0.000 description 7
- 229920000139 polyethylene terephthalate Polymers 0.000 description 7
- 239000005020 polyethylene terephthalate Substances 0.000 description 7
- 238000001125 extrusion Methods 0.000 description 6
- 239000011651 chromium Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000005029 tin-free steel Substances 0.000 description 5
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229920001903 high density polyethylene Polymers 0.000 description 4
- 239000004700 high-density polyethylene Substances 0.000 description 4
- 229920000092 linear low density polyethylene Polymers 0.000 description 4
- 239000004707 linear low-density polyethylene Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000005028 tinplate Substances 0.000 description 4
- 102100037681 Protein FEV Human genes 0.000 description 3
- 101710198166 Protein FEV Proteins 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000010409 ironing Methods 0.000 description 3
- QQVIHTHCMHWDBS-UHFFFAOYSA-L isophthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC(C([O-])=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-L 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 235000013361 beverage Nutrition 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- 241000797947 Paria Species 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- VKLYZBPBDRELST-UHFFFAOYSA-N ethene;methyl 2-methylprop-2-enoate Chemical class C=C.COC(=O)C(C)=C VKLYZBPBDRELST-UHFFFAOYSA-N 0.000 description 1
- 229920005680 ethylene-methyl methacrylate copolymer Polymers 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000012643 polycondensation polymerization Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
-
- 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
- B32B1/00—Layered products having a non-planar shape
-
- 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
- B32B15/09—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 comprising polyesters
-
- 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
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- 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
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
-
- 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.]
Definitions
- 2-piece can body made of two-piece can body and laminated steel plate
- the present invention relates to a two-piece can body made of a laminated steel plate having a high degree of processing such as a two-piece can for an aerosol can, and a laminated steel plate suitable for the production thereof.
- a two-piece can is a can made up of two parts: a can body integrated with the bottom of the can and a lid.
- a three-piece can is a can made up of three parts: a can body, top lid and bottom lid.
- the two-piece can body has a beautiful appearance due to the absence of the seam and welds, but generally requires a high degree of processing.
- the can body of the 3-piece can has a seam part, which makes the appearance worse than that of the 2-piece can, but generally requires a low degree of processing. For this reason, the market tends to use two-piece cans for small-sized and high-end products, and three-piece cans for large-capacity and low-priced products. '
- the degree of drawing of the can is high, as in the aerosol cans, and the degree of stretch in the height direction of the can is large (hereinafter also referred to as high degree of processing).
- high degree of processing In general, expensive and thick aluminum is used as the material, and cheap and thin steel plates such as tinplate and tin-free steel are rarely used.
- the aerosol 2-piece can has a very high degree of processing, so it is difficult to apply high processing such as drawing and DI processing (Draw and Ironing) to steel plates, while soft metal materials such as aluminum are difficult to apply. This is because the impact molding method can be applied. Under these circumstances, if a two-piece can body with a high degree of processing as described above can be manufactured using steel sheets such as tinplate and tin-free steel, which are inexpensive and thin, but are thin. The industrial significance is very large.
- polyester is mainly used for the coating of laminated steel sheets used as raw materials in the manufacturing method of such low-working two-piece cans.
- polyethylene terephthalate, ethylene terephthalate monoisophthalate copolymer, ethylene terephthalate monobutylene terephthalate copolymer, and an ionomer compound material having a saturated polyester as a main phase are exemplified. These are designed according to the manufacturing method of the two-piece can with low workability, and are suitable in that range.
- a method of manufacturing a can body that performs a diameter reduction process with a high degree of processing after drawing such as a two-piece can for aerosol.
- Patent Documents 1 to 3 disclose a drawing method and a DI processing method for resin-coated metal plates.
- both technologies can produce cans with low processing degrees such as beverage cans and food cans. It is a target and does not require as high a processing degree as a two-piece can for aerosol.
- Patent Documents 2 and 3 disclose that heat treatment is performed in the processing stage and the final stage in order to prevent the resin layer from being peeled off and to provide a paria after processing.
- Patent Document 2 uses an oriented thermoplastic resin and proposes a heat treatment for relaxing internal stress and promoting orientation crystallization.
- This heat treatment method is now generally used in beverage cans and the like.
- the heat treatment is It is performed in the state of a redrawn cup, and the crystallinity of the coating resin is sufficiently promoted
- Patent Document 3 discloses an example in which a resin composed of a compound of saturated polyester and ionomer is provided on the coating layer and DI processed. According to Patent Document 3, a heat treatment is performed after drawing, followed by DI, necking, and flanging. You can see that it is not targeted.
- Patent Documents 4 and '5 describe a method in which, after being molded into a can, the can is mainly heat-treated at a temperature equal to or higher than the melting point of the resin to relieve internal stress.
- the degree of processing of the resulting can body is still low as far as the description of the specification and the examples are concerned.
- Patent Document 1 Japanese Patent Publication No. 7—1 0 6 3 9 4
- Patent Document 2 Japanese Patent No. 2 5 2 6 7 2 5
- Patent Document 3 Japanese Patent Laid-Open No. 2 0 4-1 4 8 3 2 4
- Patent Document 4 Japanese Patent Publication No. 5 9-3 5 3 4 4
- Patent Document 5 Japanese Examined Patent Publication No. 6 1-2 2 6 2 6, that is, no method for producing a two-piece can body having a high degree of processing such as an aerosol can using a laminated steel sheet has been found so far. Absent. '
- the object of the present invention is to solve the above problems, have a high degree of processing like a two-piece can for aerosol cans, and a two-piece can body made of a laminated steel plate without peeling and breaking of the resin layer, and its It is providing the laminated steel plate suitable for manufacture. Disclosure of the invention
- an incompatible subphase resin having a glass transition point of 5 ° C. or less and a cross-sectional flatness of 0.5 or less is dispersed by 3 to 30 vol%.
- R radius of the circular laminated steel sheet before forming that is equivalent in weight to the can of the two-piece can
- h height of the can
- r maximum radius of the can
- d the The minimum radius of the can body
- the polyester resin has at least one dicarboxylic acid selected from the group consisting of terestal acid opsophthalic acid and ethylene glycol as main components of polymerization.
- the subphase resin is a resin mainly composed of polyolefin.
- the subphase resin is preferably at least one selected from the group consisting of polyethylene, polypropylene and ionomer.
- the present invention is also a two-piece can body satisfying the following three formulas obtained by multi-stage formation of a circular plate of the laminated steel sheet according to any one of the above. ,.
- R the radius of the circular laminated steel sheet before forming that is equivalent in weight to the can of the two-piece can
- h height of the can
- r maximum radius of the can
- d the can The minimum radius of the body
- Laminate steel sheet used to manufacture 2-piece cans satisfying the relationship of 0. l ⁇ dZR ⁇ O. 25 and 1.5 ⁇ h_ (R—r) ⁇ 4 for R.
- a main phase mainly composed of polyester and dispersed in the main phase incompatible with the main phase on at least one side of the steel plate It is made of a mixed resin in which a subphase consisting of a resin having a glass transition point (T g) of 5 ° C or less is mixed.
- the laminating steel sheet for two-piece cans is characterized by having a resin coating layer having a cross-sectional shape in the laminating direction of the subphase of 1% or less and an oblateness of 0.50 or less.
- FIG. 1 is a diagram for explaining an embodiment of a forging process of a can according to the present invention.
- FIG. 1 is a diagram for explaining an embodiment of a manufacturing process of a can according to the present invention.
- a circular blank of resin-laminated steel sheet is formed into a bottomed cylindrical shaped body by drawing (including DI processing), and the diameter of the vicinity of the opening of the shaped body is reduced, and the vicinity of the opening is It shows the process sequence for manufacturing reduced-diameter 2-piece cans.
- the “circular shape” referred to in the present invention may be any shape that can be subjected to drawing, DI processing, diameter reduction processing, Z or flange processing, and the like.
- the resin-laminated steel sheet used for processing includes not only a disk shape but also a substantially disk shape, a distorted disk shape, or an elliptical shape, for example. ⁇
- Fig. 1 is a circular plank (blank sheet) before processing
- 2 is a straight wall portion of the can (a straight wall portion that has not been reduced in process D)
- .3 is a domed shape portion.
- 4 is a straight wall portion that has been reduced in diameter at the neck shape portion
- 5 is a tapered shape portion that is a tapered wall portion after diameter reduction processing. .
- Step A one or more stages of drawing (including DI processing) are performed on the circular blank 1 to form a bottomed cylindrical molded body having a predetermined can diameter (radius; radius of can outer surface) '.
- Step B the bottom of the molded body is formed into a convex shape upward to perform dome processing to form the dome-shaped portion 3
- step C the opening side end of the molded body is trimmed.
- step C one or more stages of diameter reduction processing are performed on the opening side of the compact.
- the opening side portion of the body is reduced to a predetermined can diameter (radius d; half of the outer surface of the can) to obtain a desired final molded body (two-piece can).
- R the figure, R.
- the maximum radius and the minimum radius, and R is the radius of the circular plate before molding that is equivalent in weight to the final molded body.
- ⁇ R. Is the scale calculated from the final compact plus the amount of trimming, and is arbitrarily determined. However, since the part to be slightly rimmed is scrap, it is desired to be as small as possible industrially. It is usually 10% or less of R and at most 20% or less. That is, 'R. Often ranges from 1 to 1.1 times R and up to 1 to 1.2 times. In addition, when manufacturing a plurality of cans, it is possible to know R by a prototype. ⁇
- the radius R of the circular plate before molding that is equivalent in weight to the final molded body is determined based on the measured weight of the final molded body. That is, the weight of the final formed body is measured, and the dimension (radius) of the circular plate of the laminated steel sheet before forming, which is the same weight as this weight, is obtained by calculation, and this is formed so that the weight is equivalent to that of the final formed body.
- R be the radius of the previous circular plate. The can end is trimmed during the manufacturing process of the can body, but the radius R of the circular plate before molding, which is equivalent in weight to the final molded body, is more appropriate because the effect of trim is eliminated. It is possible to evaluate the degree of processing. .
- the resin layer is stretched in the height direction and stretched in the circumferential direction. It will shrink.
- the degree of processing is high, the amount of deformation of the resin increases, leading to the breakage of the resin layer.
- a parameter h (R ⁇ r) related to the elongation in the can height direction is used as an index of the degree of processing. This is because, in the high workability region, it is necessary to consider the elongation amount in addition to the drawing ratio in order to express the workability.
- the degree of shrinkage By defining the degree of processing by the degree of elongation, the degree of deformation of the resin layer is quantified. Since the resin layer stretches in the height direction and shrinks in the circumferential direction, it becomes easy to peel off. In addition to the degree of shrinkage, the amount of stretch in the height direction is also an important factor.
- the final molded body height h, maximum radius r, and minimum radius d are processed for the final manufactured body (final molded body).
- the range is such that 0.1 ⁇ d / R ⁇ 0.25 and 1.5 ⁇ h / (R—r) ⁇ 4 can diameter. .
- an object of the present invention is to make it possible to produce a can body having a high workability, which has been difficult in the prior art, using a laminated steel sheet.
- laminated steel sheets are used, the parameter d / R that defines the degree of shrinkage satisfies 0.25 or less, and the parameter h / (R—r) that defines the degree of elongation is 1. It was difficult to produce a can with high workability that satisfies 5 or more at the same time. Therefore, in the present invention, the working degree d / R of the can body to be manufactured is specified to be 0.25 or less and hZ (R ⁇ r) is specified to 1.5 or more.
- the working degree of the can body to be manufactured is defined as 0.1.l ⁇ dZR and h / (R-r) ⁇ 4.
- the multi-stage forming that is the subject of this date is any one of drawing, DI, and diameter reduction, or a combination of these.
- the final molded body dimensions are r> d.
- the present invention also provides a laminated steel sheet for producing a final formed body (2-piece can) satisfying the above-mentioned degree of processing. That is, the laminated steel sheet comprises an incompatible subphase resin having a glass transition point of 5 ° C. or less and a cross-sectional flatness of 0.5 or less. It has a polyester resin layer dispersed in 3 O vol% on at least one side of the steel sheet.
- the underlying metal plate used in the laminated steel sheet of the present invention is a steel sheet, it is cheaper and more economical than aluminum.
- general tin-free steel or tinplate should be used.
- Tin-free steel for example, a metal layer of chromium coating weight 5 0 ⁇ 2 0 O mg / m 2 on the surface, the adhesion amount of metal chromium conversion has a chromium oxide layer of 3 ⁇ 3 O mg / m 2 Is preferred. It is preferable that the tinplate has a sticking amount of 0.5 to 15 g / m 2 .
- the plate thickness is not particularly limited, and for example, a thickness in the range of 0.15 ′ to 0.3 O mm can be applied.
- the volume ratio of the subphase resin in the polyester resin (main phase) is specified to be 3 V o 1% or more and 30 V o 1% or less.
- the volume ratio of the secondary phase is 3 yo 1% or more, the stress buffering effect due to the secondary phase is easy to develop, and when it is 30 V o 1% or less, the secondary phase particles in the main phase resin layer are sufficiently dispersed This is because if the content exceeds 30 V o 1%, the secondary phase resin may agglomerate, resulting in insufficient dispersion.
- An example of such a dispersed state is a system in which a sub-phase resin having a particle size of 0.1 to 5 m is dispersed in a polyester resin which is a main phase.
- the methods of laminating resin to steel plates can be broadly classified into film crimping methods in which resin films are crimped and direct extrusion methods in which a resin layer is directly formed on a steel plate using a T-die.
- the film press-bonding method is roughly classified into a method involving a stretching operation such as biaxial stretching and a method of performing non-stretching (or slightly stretching in the scraping direction) by an extrusion method.
- the inventor obtained a biaxially stretched film produced by the direct extrusion method as a steel sheet. Two of the promising materials that were sufficiently melted and laminated during thermocompression bonding were found to be promising.
- the stretching method is a technique in which a semi-molten resin is stretched and thinned. By this technique, the subphase resin is deformed and becomes flat. 'Specifically, deformation shrinks in the thickness direction as the film thickness decreases with stretching, and stretches in the stretching direction.
- the secondary phase resin is isotropically circular in the stretched plane and shrinks in the thickness direction.
- uniaxial stretching is applied to a semi-molten composite resin, it shrinks in the thickness direction and stretches in the film forming direction. Therefore, when the cross section obtained by cutting the obtained film along a plane parallel to the film surface is observed, the subphase resin has an elliptical shape that is long in the film forming direction.
- the subphase resin has an elliptical shape that is long in the film forming direction.
- the film is almost circular or slightly shrunk in the thickness direction.
- the subphase is flattened by undergoing processing such as stretching.
- the “cross-sectional flatness” of the secondary phase resin referred to in the present invention is as follows for the elliptical secondary phase resin seen in the cross-section cut in parallel along the line direction of the laminated steel plate. Defined in ⁇
- the secondary phase flatness ratio is defined as 0.5 or less. More preferably, it is 0.20 or less.
- the polyester resin is obtained by condensation polymerization of a dicarboxylic acid component and a diol component.
- the polyester resin which is the main phase of the composite resin of the present invention, is composed of at least one dicarboxylic acid selected from the group consisting of terephthalic acid and isophthalic acid and ethylene glycol from the viewpoint of a balance between elongation and strength required for processing. It is a resin whose main component is polymerization.
- “main component of polymerization” means the resin used for polyester resin.
- L 0 0 m o 1% preferably 85 m o 1% or more, more preferably 9 2 m o 1% or more.
- the resin having a glass transition point of 5 ° C. or lower which is a subphase of the composite resin of the present invention, is preferably a resin mainly composed of polyolefin from the viewpoint of deformability.
- a resin mainly composed of polyolefin from the viewpoint of deformability.
- it is preferably at least .1 type selected from the group consisting of polyethylene, polypropylene, and ionomer.
- the laminated steel sheet of the present invention may be used by adding additives such as powdered pigments, lubricants and stabilizers in the resin layer, or in addition to the resin layer defined in the present invention, the resin layer having other functions as an upper layer. Or you may arrange
- the thickness of the resin layer is not particularly limited, but is preferably 10 jum or more and 50 jum or less.
- the film cost of less than 10 / m is generally expensive, and the thicker the film thickness, the better the workability, but the higher the cost. This is because the contribution is saturated and expensive.
- the laminated steel sheet defined by the present invention is sufficient if at least one surface of the steel sheet is coated with the resin layer defined by the present invention. ⁇
- the molded product is subjected to a glass transition point of the polyester resin in the middle of processing or in the final process.
- Apply heat treatment to heat to the above temperature to reduce internal stress in the resin It is also preferable to relax.
- the orientation caused by the processing may be lost by heating to a temperature equal to or higher than the melting point of polyester resin.
- the heat treatment method is not particularly limited, and it has been confirmed that the same effect can be obtained with an electric furnace, a gas oven, an infrared furnace, an induction heater, or the like.
- the heating rate, heating time, and cooling rate may be appropriately selected according to the effect, but the faster the heating rate, the more efficient, and the approximate heating time is about 15 to 60 seconds. It is not limited to this range.
- the cooling time is fast because it is easy to avoid the formation of spherulites. Therefore, the shorter the cooling time for cooling to a temperature below the glass transition point of the polyester resin after the heat treatment, the better.
- Thickness Q 2 O mm CA 4 CA TFS (metal Cr layer: 120 mg / m 2 ,. Cr oxide layer: 1 O mg / m 2 in terms of metal Cr)
- Various resin layers were formed on the original plate using a film laminate method (film thermocompression bonding method) or a direct laminating method (direct extrusion method).
- film laminate method film thermocompression bonding method
- direct laminating method direct extrusion method
- film lamination two types were used: one using a biaxially stretched film and one using an unstretched film.
- Laminated steel sheets were produced by laminating films with a thickness of 25 jw m on both sides of the metal sheet. -The shape of the dispersed particles in the resin of the manufactured laminated steel sheet was measured as follows. .
- the laminated steel sheet was embedded in a resin and polished so that a cross section in the in-direction (lamination longitudinal direction) could be observed. Subsequently, the polished surface was immersed in ⁇ -NaOH solution for about 10 minutes, and then washed with water. Disperse this section with a scanning electron microscope. Observing 50 olefin particles, the major axis and the minor axis were measured, the oblateness was obtained, and the average value was taken as the oblateness. -..
- Tables 1 and 2 show the production method of laminated steel sheets and the contents of the laminated steel sheets produced.
- the laminating method is as follows.
- the film prepared by the biaxial stretching method was subjected to thermocompression bonding with a nip roll while the steel plate was heated to (resin melting point + 10 ° C.), and then cooled by water cooling within 7 seconds.
- Film thermocompression bonding method 2 “..” Unstretched film was thermocompression bonded in a nip hole with the steel sheet heated to (melting point of resin + 10 ° C), and then water-cooled within 7 seconds. I cooled it.
- the resin pellets are kneaded and melted by an extruder, supplied from a T-die onto a running steel plate and coated, and then the resin-coated steel plate is nip-cooled by a cooling roll at 80 ° C. Cooled by water cooling. .
- a can body (final formed body) was prepared according to the following procedure according to the manufacturing process shown in FIG. Table 3 shows the shapes of the intermediate compact (Process C) and final compact (Process D).
- the drawing process in process A was performed in 5 stages, and the diameter reduction process in process D was performed in 7 stages.
- h, r, d, ha, hc, and R of the final molded body are the height to the open end of the final molded body, the radius of the can body (2), and the neck shape 3 , The height of the can body (2), the height of the neck shape part 3, and the radius of the circular plate blank before molding that is equivalent in weight to the final molded body (see Fig. 1).
- the radius R of the circular plate blank was determined as follows. The weight of the blank sheet before molding and the weight of the final molded body after the trimming process are measured. Based on the measurement results, the weight of the final molded body is equivalent to the weight of the final molded body.
- the radius of the pre-formed plank sheet was determined, and this radius was set as the radius R of the circular plate blank before forming, which is equivalent in weight to the final product. '
- ironing was also used as appropriate to produce the desired can body.
- a hemispherical overhang with a depth of 6 mm was applied to the bottom of the can.
- the upper end of the can was trimmed by about 2mm. ⁇ '
- the diameter of the upper part of the cylinder is reduced, and specifically, the final shape of the can body shown in Table 3 is implemented by the die neck method in which the opening end is pressed against the inner tapered die.
- a can body was prepared. .
- the can body was sheared into a substantially rectangular shape in the can height direction so that the width in the circumferential direction was 15 mm, and the position of 1 Omm from the bottom surface in the can height direction was linear in the circumferential direction.
- a test piece consisting of a 1 Omm portion and the remaining portion on the bottom side in the can height direction from the shearing position was created.
- Connect a steel plate with a width of 15 mm and a length of 6 Omm to the 1 Omm portion (welding), hold the 6 Omm steel plate portion, and peel the remaining film about 1 Omm from the breaking position.
- a peel test was performed in the 180 ° direction with the part where the film was separated and the 6 Omm steel plate part being held. The minimum observed peel strength was used as an index of adhesion.
- Can bodies C1 to C20 are examples of the present invention, and showed good values for film adhesion and workability. .
- the cans 021 to 023 were examples of the present invention, but the flatness was relatively high, and the evaluation of adhesion remained at 0.
- Can body C 27 had a subphase volume ratio that was outside the lower limit of the present invention, and the evaluation was X for both workability and adhesion. .
- Can bodies C 2 8 and C 3 1 had Tg of the subphase outside the upper limit of the present invention, and the evaluation was X for both workability and adhesion.
- the can body 29 is a single phase of PET, and the evaluation was X for both workability and adhesion.
- Can C 30 does not use PET as the main phase, but uses a single-phase resin (resin in which 50% of the acid-modified component of acid-modified ethylene methyl methacrylate copolymer is neutralized with Zn). It was coated, and the evaluation was X for both workability and adhesion. .
- the can bodies C 3 2 to 3 4 — have a flatness outside the scope of the present invention. Both adhesion and workability were X. .
- the laminated steel sheet of the present invention has a composite resin layer made of a polyester resin as a main phase and a subphase resin under specific conditions as a laminate layer.
- a two-piece can is manufactured using this laminated steel plate, a two-piece can with a high degree of processing like an aerosol can is manufactured without peeling and breaking of the laminate layer due to the stress buffering effect of the secondary phase resin. it can.
- PET-PBT 60 Polyethylene terephthalate, toe polybutylene terephthalate copolymer Polybutylene terephthalate (60mol%)
- LLDPE Linear low density polyethylene
- HDPE High density polyethylene
- PET Polyethylene terephthalate
- PET-1 Polyethylene terephthalate-polyethylene isophthalate copolymer Isophthalate (4mol%)
- PET-1 Polyethylene terephthalate-polyethylene isophthalate copolymer Isophthalate (8mol%)
- PET-1 Polyethylene terephthalate-polyethylene isophthalate copolymer Isophthalate (12mol%)
- PBT Polybutylene terephthalate
- PET-PBTC60 Polyethylene terephthalate!--Polybutylene terephthalate copolymer Polybutylene terephthalate (60mol%)
- LLDPE ⁇ Linear low density polyethylene
- HDPE High density polyethylene
- Blank diameter R is the blank diameter converted from the weight of the final compact.
- a can of a two-piece can is manufactured using the laminated steel sheet of this effort, it is made of a laminated steel plate that does not peel and break the resin layer while having a high degree of processing like a two-piece can for aerosol cans.
- a two-piece can body is obtained.
- the laminated steel sheet is inexpensive and uses a steel sheet material that is thin but has high strength, the two-piece can having high strength and high corrosion resistance can be mass-produced at low cost. Therefore, the present invention can greatly contribute to the industry.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06796478.3A EP1914064B1 (en) | 2005-08-12 | 2006-08-10 | Laminate steel sheet for can body of two-piece can and two-piece can comprising laminate steel sheet |
CN2006800275192A CN101232993B (zh) | 2005-08-12 | 2006-08-10 | 2片罐体用层压钢板和层压钢板制的2片罐体 |
US12/063,616 US20090041964A1 (en) | 2005-08-12 | 2006-08-10 | Laminated steel sheet for use in two-piece can and two-piece can formed of laminated steel sheet |
CA2618461A CA2618461C (en) | 2005-08-12 | 2006-08-10 | Laminated steel sheet for use in two-piece can and two-piece can formed of laminated steel sheet |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-234557 | 2005-08-12 | ||
JP2005234557A JP4622737B2 (ja) | 2005-08-12 | 2005-08-12 | 2ピース缶用ラミネート鋼板および2ピースラミネート缶 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007020950A1 true WO2007020950A1 (ja) | 2007-02-22 |
Family
ID=37757607
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/316121 WO2007020950A1 (ja) | 2005-08-12 | 2006-08-10 | 2ピース缶体用ラミネート鋼板およびラミネート鋼板製の2ピース缶体 |
Country Status (8)
Country | Link |
---|---|
US (1) | US20090041964A1 (ja) |
EP (1) | EP1914064B1 (ja) |
JP (1) | JP4622737B2 (ja) |
KR (1) | KR101002824B1 (ja) |
CN (1) | CN101232993B (ja) |
CA (1) | CA2618461C (ja) |
PT (1) | PT1914064E (ja) |
WO (1) | WO2007020950A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4961696B2 (ja) * | 2005-08-12 | 2012-06-27 | Jfeスチール株式会社 | 2ピース缶の製造方法および2ピースラミネート缶 |
CA2787546C (en) | 2010-02-04 | 2018-03-13 | Crown Packaging Technology, Inc. | Can manufacture |
US8313003B2 (en) | 2010-02-04 | 2012-11-20 | Crown Packaging Technology, Inc. | Can manufacture |
CA2793921C (en) | 2010-04-12 | 2018-03-20 | Crown Packaging Technology, Inc. | Can manufacture |
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- 2006-08-10 US US12/063,616 patent/US20090041964A1/en not_active Abandoned
- 2006-08-10 WO PCT/JP2006/316121 patent/WO2007020950A1/ja active Application Filing
- 2006-08-10 PT PT67964783T patent/PT1914064E/pt unknown
- 2006-08-10 EP EP06796478.3A patent/EP1914064B1/en not_active Not-in-force
- 2006-08-10 CA CA2618461A patent/CA2618461C/en not_active Expired - Fee Related
- 2006-08-10 CN CN2006800275192A patent/CN101232993B/zh not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
---|---|
CN101232993A (zh) | 2008-07-30 |
US20090041964A1 (en) | 2009-02-12 |
KR20080017098A (ko) | 2008-02-25 |
CA2618461C (en) | 2013-04-30 |
EP1914064A4 (en) | 2009-10-21 |
CA2618461A1 (en) | 2007-02-22 |
KR101002824B1 (ko) | 2010-12-21 |
EP1914064A1 (en) | 2008-04-23 |
JP4622737B2 (ja) | 2011-02-02 |
EP1914064B1 (en) | 2013-10-16 |
CN101232993B (zh) | 2012-09-05 |
PT1914064E (pt) | 2013-12-04 |
JP2007045116A (ja) | 2007-02-22 |
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