WO2025094508A1 - フィルムラミネート鋼板及びｄｉ缶の製造方法 - Google Patents

フィルムラミネート鋼板及びｄｉ缶の製造方法 Download PDF

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Publication number
WO2025094508A1
WO2025094508A1 PCT/JP2024/032024 JP2024032024W WO2025094508A1 WO 2025094508 A1 WO2025094508 A1 WO 2025094508A1 JP 2024032024 W JP2024032024 W JP 2024032024W WO 2025094508 A1 WO2025094508 A1 WO 2025094508A1
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Prior art keywords
film
steel sheet
wax
layer
amount
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PCT/JP2024/032024
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English (en)
French (fr)
Japanese (ja)
Inventor
伸生 門脇
雄太 田島
和史 岩切
知弘 水谷
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Nippon Steel Corp
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Nippon Steel Corp
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Priority to JP2024573394A priority Critical patent/JP7716031B1/ja
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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
    • 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
    • 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—Rigid or semi-rigid 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 or by deep-drawing operations performed on sheet material
    • B65D1/12—Cans, casks, barrels, or drums
    • 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
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/42—Applications of coated or impregnated materials

Definitions

  • the present invention relates to a method for manufacturing film-laminated steel sheets and DI cans.
  • paper-wrapped cans and distortion-printed cans are often used as cans for food products.
  • distortion-printed cans it is important that the printed pattern does not become distorted during molding, so the can height is set relatively low, and the molding methods often used are Drawn (DR) molding and Drawn and Redraw (DRD) molding.
  • DR Drawn
  • DI Drawn and Ironing
  • DI forming is a forming method in which the can wall of the cup obtained by draw forming a steel sheet is ironed to reduce the thickness of the can wall to about 40 to 60% of the thickness of the steel sheet, thereby increasing the can height.
  • DI forming is characterized by a very large amount of deformation in the thickness direction and the height direction of the can, and a fast forming speed, and the temperature of the steel sheet during forming rises to nearly 200°C. For this reason, for example, in the DI forming of tinplate, a type of tin-plated steel sheet, a coolant containing a lubricant is sprayed onto the ironing die during forming to cool the ironing die.
  • the coolant sprayed onto the ironing die also adheres to the formed DI can, so a process is required to wash and remove the coolant from the formed DI can and dry the DI can after washing.
  • a processing facility for such coolant was required as part of the manufacturing equipment.
  • film-laminated steel sheets wax can be applied to the film surface during the manufacturing process of the laminated steel sheets. Therefore, when manufacturing cans using film-laminated steel sheets, there is no need to apply lubricant during molding, and the process of washing and drying the lubricant, as well as the lubricant treatment equipment, can be omitted. Due to these advantages, film-laminated steel sheets have been widely used in DRD food cans in recent years.
  • Patent Document 1 discloses a laminated metal sheet for a two-piece can body, which has a polyester resin film layer on both sides of the metal sheet, the crystallization temperature of the polyester resin film layer on the outer surface side of the can body is 60 to 100°C, and the center line surface roughness (Ra) of the surface is 0.25 to 1.8 ⁇ m.
  • Patent Document 1 also discloses a laminated metal sheet for a two-piece can body, in which the polyester resin film layer on the outer surface side of the can body is composed of 40 to 100 mass% of a resin whose main constituent unit is butylene terephthalate and 0 to 60 mass% of a resin whose main constituent unit is ethylene terephthalate, and the center line surface roughness (Ra) of the film layer surface on the inner surface side of the can body is 0.2 to 1.8 ⁇ m.
  • Patent Document 2 discloses a laminated steel sheet for containers having excellent workability in punching and drawing can-making, in which convex portions each having a height of 2 to 10 ⁇ m and a circle-equivalent diameter d of 0.010 to 0.10 mm are formed on the film surface at a rate of 15 or more per mm2, and a space containing air or an inert gas is present between the resin film and the steel sheet directly below the convex portions.
  • the present invention has been made in consideration of the above problems, and the object of the present invention is to provide a film-laminated steel sheet that can further improve punch-ejection properties while maintaining ironing formability during DI forming, and a manufacturing method for DI cans using such a film-laminated steel sheet.
  • the present inventors have conducted extensive research and have come up with the idea of optimizing the balance between the sliding properties of the side of the film-laminated steel sheet that will become the inner surface of the can and the sliding properties of the side that will become the outer surface of the can, thereby maintaining the ironing formability during DI forming and further improving the punch-ejectability.
  • the gist of the present invention which has been completed based on the above-mentioned concept, is as follows: In the following description, the expression "(numerical value A) to (numerical value B)" means "(numerical value A) or more and (numerical value B) or less.”
  • a film-laminated steel sheet comprising a base material steel sheet, a film layer made of a thermoplastic polyester film provided on the front and back surfaces of the steel sheet, and a wax layer provided on the film layer, wherein the adhesion amount of the wax layer is within the range of 0.030 to 0.135 g/ m2 per side, the adhesion amount of the wax layer differs between the front and back surfaces of the steel sheet, and the adhesion amount ratio obtained by dividing the adhesion amount of the wax layer on the side with a larger adhesion amount by the adhesion amount of the wax layer on the side with a smaller adhesion amount is within the range of 1.05 to 1.35.
  • thermoplastic polyester film constituting the film layer on the side with the lesser adhesion amount 215°C or more and less than 255°C
  • the melting point of the thermoplastic polyester film constituting the film layer on the side with the greater adhesion amount is 220 to 260°C
  • the melting point of the thermoplastic polyester film on the side with the greater adhesion amount is 5°C or more higher than the melting point of the thermoplastic polyester film on the side with the lesser adhesion amount.
  • the wax constituting the wax layer has a penetration defined by JIS K2235:2022 of 5 to 20 at a test temperature of 25°C, and the melting point of the wax is 50.0 to 70.0°C.
  • FIG. 1 is an explanatory diagram showing a schematic configuration of a film-laminated steel sheet according to an embodiment of the present invention.
  • Fig. 1 is an explanatory diagram that shows a schematic configuration of the film-laminated steel sheet according to the present embodiment.
  • the film-laminated steel sheet according to this embodiment is used as a material for DI cans.
  • the film-laminated steel sheet 1 according to this embodiment has a base steel sheet 10 which is the base material of the film-laminated steel sheet 1, film layers 21, 22 provided on the front and back surfaces of the base steel sheet 10, and wax layers 31, 32 provided on the film layers.
  • the amount of wax adhered to the wax layer 31 is different from the amount of wax adhered to the wax layer 32, as described in detail below.
  • Figure 1 illustrates an example in which the amount of wax adhered to the wax layer 32 is greater than the amount of wax adhered to the wax layer 31.
  • the difference in the amount of wax attached to the wax layers 31 and 32 as described above is important when manufacturing DI cans using the film-laminated steel sheet 1 as a material. Details will be explained again below, but when manufacturing DI cans using the film-laminated steel sheet 1 according to this embodiment, the film-laminated steel sheet 1 is positioned so that the wax layer on the side with the greater amount of wax attached is located on the side that will become the inner surface of the DI can. That is, in the case of the film-laminated steel sheet 1 shown in FIG.
  • the film-laminated steel sheet 1 is positioned in the molding device so that the side on which the wax layer 31 exists becomes the side that will become the outer surface of the DI can, and the side on which the wax layer 32 exists becomes the side that will become the inner surface of the DI can.
  • the film layer located on the side that will become the outer surface of the DI can will be referred to as the "outer can film layer,” and the wax layer located on the side that will become the outer can surface will be referred to as the "outer can wax layer.”
  • the film layer located on the side that will become the inner can surface will be referred to as the “inner can film layer”
  • the wax layer located on the side that will become the inner can surface will be referred to as the "inner can wax layer.”
  • film layer without distinguishing between the inner and outer surfaces of the can
  • wax layer when referring to a wax layer without distinguishing between the inner and outer surfaces of the can, it may be abbreviated to simply "wax layer.”
  • the steel sheet used as the base steel sheet 10 may be any of various known steel sheets for cans to be used for drawing.
  • the drawing and ironing process is a forming method in which the can wall of a generally cylindrical cup is drawn out by ironing to reduce the thickness of the can wall. Therefore, if there is variation in the thickness of the can wall of the cup, the ironing resistance of the thicker part increases, and the can wall may be more likely to break during ironing.
  • the r-value of the steel plate used as the base steel plate 10 is more preferably 1.10 or more.
  • the upper limit of the r-value of the steel plate used as the base steel plate 10 is not particularly specified, but in practice it is approximately 1.20.
  • the absolute value of the ⁇ r value 0.45 or less i.e., -0.45 ⁇ r ⁇ +0.45
  • the absolute value of the ⁇ r value of the steel plate used as the base steel plate 10 is more preferably 0.25 or less.
  • the lower limit of the ⁇ r value of the steel plate used as the base steel plate 10 is not particularly specified, and the lower the better, with zero being the most preferable.
  • the r value and ⁇ r value are defined in JIS Z2254:2021 and can be measured in accordance with JIS Z2254:2021.
  • the r value is also called the plastic strain ratio or the Lankford value.
  • the ⁇ r value is an index of in-plane anisotropy.
  • the r value when the angle between the tensile direction of the tensile test piece and the rolling direction of the material is ⁇ is expressed as r ⁇ , and is a value defined by the following formula when the deformation characteristics in each direction are measured by changing ⁇ .
  • r0 , r45 , and r90 are r values at angles where the tensile direction is 0°, 45°, and 90°, respectively, relative to the rolling direction of the material.
  • ⁇ r (r 0 -2 ⁇ r 45 +r 90 )/2
  • the can body is more likely to break during forming because the steel sheet does not elongate much during forming, and the heat generated by the steel sheet during ironing increases, making the film layer (described below) more likely to soften due to the heat. For this reason, when forming DI cans with a high ironing ratio, it is particularly preferable to use a single-rolled material with a temper of T3 or less as the base steel sheet 10.
  • the film-laminated steel sheet 1 it is more preferable that the adhesion between the base steel sheet 10 and the film layer is high.
  • a test piece 15 mm wide x 50 mm high is taken from any position of the film-laminated steel sheet 1 of interest, and one of the film layers of the test piece is peeled at 180° at 20 mm/min, and the peel strength is preferably 10 N/15 mm or more.
  • Such a peel strength is more preferably 15 N/15 mm or more.
  • the higher the peel strength the better, and there is no particular upper limit specified.
  • the film layer in the film-laminated steel sheet 1 according to this embodiment is made of thermoplastic polyester.
  • steel sheets that have excellent adhesion to polyester include chromium-based tin-free steel ECCS (Electrolytic Chromium Coated Steel) and chromium-free tin-free steel.
  • Chromium-based tin-free steel is a plated steel sheet in which a metallic chromium layer and a chromium oxide hydrate layer are formed in that order on the front and back surfaces of the steel sheet used as the base material.
  • the surface of this tin-free steel is prone to forming hydrogen bonds with the hydroxyl and carbonyl groups of the polyester resin, improving adhesion with the film layer.
  • the surface of a chrome-free tin-free steel sheet which has a coating formed on the front and back surfaces of the steel sheet that is composed of one or more elements selected from Zr, Al, Si, P, Ti, Ce, and W, O, and unavoidable components and does not contain chrome, preferably has hydroxyl groups. These hydroxyl groups form hydrogen bonds with the hydroxyl groups and carbonyl groups of the polyester resin, improving adhesion with the film layer.
  • examples of the base steel sheet 10 include tinplate made by subjecting electrolytic Sn-plated steel sheet to a chromate treatment, and chromate-free tinplate made by subjecting electrolytic Sn-plated steel sheet to a chromium-free coating as described above.
  • the thickness of the base steel sheet 10 is not particularly limited as long as it is a thickness that can realize a desired thickness of the can wall portion after DI forming.
  • the thickness of the base steel sheet 10 may be, for example, about 0.15 to 0.26 mm.
  • the film-laminated steel sheet is immersed in boiling hydrogen peroxide water to peel off the film (usually the film peels off within 30 minutes), and the thickness of the base steel sheet after the film has been peeled off is measured with a micrometer.
  • ironing dies are arranged in multiple stages and the raw steel sheet is formed into the desired shape.
  • a film-laminated steel sheet with a base steel sheet with too small a surface roughness is DI formed, the surface of the film layer is smoothed as it passes through the first stage of ironing dies, and at the same time, the wax that has accumulated in the depressions caused by the concave parts of the base steel sheet is also more likely to fall off.
  • the sliding properties of the film-laminated steel sheet decrease as it passes through the second and subsequent ironing dies, which can make the film layer more susceptible to wear.
  • the above-mentioned scraping of the film layer and the occurrence of pinholes in the film layer are phenomena related to the ironing properties during high-speed forming of DI cans, and both can occur in the can outer surface side film layer 21 shown in FIG. 1. Therefore, in the film-laminated steel sheet 1 according to this embodiment, the surface of the base steel sheet 10 that will become the can outer surface of the DI can (i.e., the surface on which the can outer surface side film layer 21 is provided) preferably has a surface roughness of 0.10 to 0.50 ⁇ m in arithmetic mean roughness Ra as defined in JIS B0601:2013.
  • the surface roughness of the base steel sheet 10 that will become the can outer surface is more preferably 0.10 ⁇ m or more in Ra. Furthermore, the surface roughness of the base steel sheet 10 on the side that will become the outer surface of the can is preferably 0.30 ⁇ m or less in Ra.
  • the surface roughness of the base steel sheet 10 on the side that will become the outer surface of the can is 0.10 to 0.50 ⁇ m in Ra
  • the thickness of the film layer 21 on the outer surface of the can which will be described in detail below, is 12 to 40 ⁇ m, which further prevents the above-mentioned film chipping and pinholes from occurring, and also prevents the occurrence of pressure scratches on the film layer 21 on the outer surface of the can, making this even more preferable.
  • the surface roughness of the base steel plate 10 as described above can be measured using a commercially available surface roughness meter (for example, a surface roughness profiler Surfcom 570A manufactured by Tokyo Seiki Co., Ltd.) conforming to JIS B0601:2013. More specifically, the wax layer and film layer are peeled off from the film-laminated steel plate 1 of interest by immersion treatment using boiling hydrogen peroxide water to expose the base steel plate 10, and a measurement sample having a size of 200 mm x 200 mm is taken from any point on the surface of the base steel plate 10. Then, measurements are taken three times for any three points on the measurement sample along the rolling direction of the base steel plate 10 and along the direction perpendicular to the rolling direction. The average of the measurements obtained in this way may be regarded as the surface roughness of the base steel plate 10.
  • a commercially available surface roughness meter for example, a surface roughness profiler Surfcom 570A manufactured by Tokyo Seiki Co., Ltd.
  • the film layer in the film-laminated steel sheet 1 according to this embodiment is a layer provided on the front and back surfaces of the base steel sheet 10, as shown diagrammatically in FIG. 1, and is composed of a thermoplastic polyester film.
  • thermoplastic polyester means "a thermoplastic polymer compound having an ester bond (-COO-).”
  • thermoplastic polyester film constituting the film layer is a thermoplastic film that does not soften even at around 200°C.
  • the melting point of the thermoplastic polyester film constituting the can outer surface side film layer 21 is preferably 215°C or higher.
  • the melting point of the thermoplastic polyester film constituting the can outer surface side film layer 21 is more preferably 216°C or higher, and even more preferably 218°C or higher.
  • the film-laminated steel sheet 1 if the melting point of the thermoplastic polyester film constituting the can outer film layer 21 exceeds 260°C, the film has a high deformation resistance when the mold temperature is still low immediately after the start of DI molding, and the film may break in areas where bending distortion is large, such as the punch shoulder and the ring processing part of the can bottom.
  • the melting point of the thermoplastic polyester film constituting the can outer film layer 21 is preferably 5°C or higher than the melting point of the thermoplastic polyester film constituting the can outer film layer 21.
  • the melting point of the thermoplastic polyester film constituting the can outer film layer 21 is preferably less than 255°C.
  • the melting point of the thermoplastic polyester film constituting the can outer film layer 21 is more preferably 240°C or less, and even more preferably 235°C or less.
  • Can inner surface film layer 22 Regarding the side of the film-laminated steel sheet 1 that will become the inner surface of the can, when the temperature of the steel sheet rises and the film layer softens, the film becomes more likely to adhere to the punch, which may result in a decrease in punch-ejectability. As a result of the punch becoming difficult to eject, the end of the can may get caught on a stopper provided on the mold, resulting in deformation of the end of the can. However, if the film is softened less than the film layer on the side that will become the outer surface of the can, the slipperiness of the side that will become the inner surface of the can is relatively better than that of the side that will become the outer surface of the can when the punch is pulled out.
  • the melting point of the thermoplastic polyester film that constitutes the film layer on the side that will become the inner surface of the film-laminated steel sheet 1 i.e., the film layer 22 on the inner surface side of the can in FIG. 1 is higher than the melting point of the thermoplastic polyester film that constitutes the film layer 21 on the outer surface side of the can.
  • the inventors conducted detailed studies based on the above idea and discovered that punch-ejection properties are improved when the melting point of the thermoplastic polyester film constituting the can inner surface film layer 22 is at least 5°C higher than the melting point of the thermoplastic polyester film constituting the can outer surface film layer 21.
  • the melting point of the thermoplastic polyester film constituting the can outer surface film layer 21 is preferably 215°C or higher.
  • the melting point of the thermoplastic polyester film constituting the can outer surface film layer 21 is more preferably 218°C or higher, and even more preferably 220°C or higher.
  • the film-laminated steel sheet 1 if the melting point of the thermoplastic polyester film constituting the can inner surface film layer 22 exceeds 260°C, as in the case of the can outer surface film layer 21, the film has a high deformation resistance when the mold temperature is still low immediately after the start of DI molding, and the film may tear in areas where bending strain is large, such as the punch shoulder and the ring processed part of the can bottom.
  • the melting point of the thermoplastic polyester film constituting the can inner surface film layer 22 is more preferably 255°C or less, and even more preferably 250°C or less.
  • thermoplastic polyester film having a melting point in the range of 220 to 260°C and at least 5°C higher than the melting point of the thermoplastic polyester film constituting the can outer surface film layer 21.
  • the difference in melting points between the thermoplastic polyester films on the can inner surface and the can outer surface is more preferably 10°C or more, and even more preferably 15°C or more.
  • the upper limit of the difference in melting points between the thermoplastic polyester films on the can inner surface and the can outer surface is not particularly specified, but in practice the upper limit is about 30°C.
  • a sample is taken from any location of the film layer in the film-laminated steel sheet 1 of interest, and the obtained sample is analyzed, for example, by Fourier transform infrared spectroscopy (FT-IR). If the results of such analysis indicate the presence of ester bonds, it can be determined that the film layer of interest is composed of a polyester film. In addition, by checking whether the obtained sample softens when heated, it can be determined whether or not the resin that constitutes the film layer of interest is thermoplastic.
  • FT-IR Fourier transform infrared spectroscopy
  • the melting point of the thermoplastic polyester film as described above can be determined by taking a sample of about 5 to 10 mg from any location of the film layer of the film-laminated steel sheet 1 of interest, analyzing the obtained sample by differential scanning calorimetry (DSC), and confirming the temperature that gives the main endothermic peak in the analysis results.
  • DSC differential scanning calorimeter
  • a commercially available differential scanning calorimeter e.g., DSC7030 manufactured by Hitachi High-Tech Science Corporation
  • DSC7030 manufactured by Hitachi High-Tech Science Corporation
  • thermoplastic polyester film used for the film layer is preferably a film that does not leach resin components into the food contents contained therein or adsorb flavor components, even when subjected to can forming, baking, and retort processing.
  • thermoplastic polyester film used for the film layer has an elongation of 100% or more by itself.
  • the film has an elongation of 100% or more by itself, it is possible to further prevent the film layer from breaking when the film-laminated steel sheet 1 is DI-formed.
  • the thermoplastic polyester film constituting the can outer surface side film layer 21 preferably has a melting point of 215°C or higher, as mentioned above, in addition to the above-mentioned characteristics for food contents and film elongation.
  • thermoplastic polyester films examples include polybutylene terephthalate resin, copolymer resin of butylene terephthalate and ethylene terephthalate and/or ethylene terephthalate isophthalate, blend resin of polybutylene terephthalate resin and polyethylene terephthalate resin and/or polyethylene isophthalate terephthalate resin, ethylene terephthalate isophthalate copolymer resin, blend resin of polyethylene terephthalate resin and polyethylene terephthalate isophthalate copolymer resin, etc.
  • the polybutylene terephthalate is contained in an amount of 50% by mass or more.
  • the blend resin contains 50% by mass or more of polybutylene terephthalate resin, since this makes the resin easier to elongate and has high breaking strength.
  • thermoplastic polyester film constituting the can inner surface film layer 22 has a melting point that is at least 5°C higher than the melting point of the thermoplastic polyester film constituting the can outer surface film layer 21, as mentioned above.
  • thermoplastic polyester films examples include polyethylene terephthalate resin, polyethylene terephthalate isophthalate copolymer resin, polyethylene terephthalate butylene terephthalate copolymer resin, blended resin of polyethylene terephthalate resin and polyethylene terephthalate isophthalate copolymer resin, blended resin of polyethylene terephthalate and polybutylene terephthalate resin, blended resin of polyethylene terephthalate isophthalate copolymer resin and polyethylene terephthalate butylene terephthalate copolymer resin, stretched or unstretched films of the blended resins of the above resins, etc.
  • the thermoplastic polyester film used in the film layer may be a stretched film or a non-stretched film.
  • the stretch ratio is 3 or less.
  • the film used in the film-laminated steel sheet 1 may be a multi-layer film having two to three layers.
  • thermoplastic polyester film used in the film layer may be added to various additives such as pigments, lubricants, antioxidants, heat stabilizers, antistatic agents, and crystal nucleating agents.
  • additives such as pigments, lubricants, antioxidants, heat stabilizers, antistatic agents, and crystal nucleating agents may be added to the thermoplastic polyester film used in the film layer as necessary.
  • the elongation of the thermoplastic polyester film as described above can be determined by measuring in accordance with JIS K7161-1:2014 and JIS K7127:1999. Specifically, after removing the wax layer of the film-laminated steel sheet 1 of interest with hexane, a tensile test piece can be taken from any location on the film layer in accordance with the above standards. The obtained tensile test piece can be set in a tensile testing machine and a tensile test can be performed at a measurement temperature of 23 to 25°C.
  • the film layer on the side of the film-laminated steel sheet 1 that becomes the can outer surface i.e., the can outer surface side film layer 21
  • the film layer on the side of the film-laminated steel sheet 1 that becomes the can outer surface is subjected to a strong shear force, particularly by ironing. Therefore, if the thickness of the can outer surface side film layer 21 is too thin, the surface of the film layer may be scraped, which may easily cause pinholes. On the other hand, if the thickness of the can outer surface side film layer 21 is too thick, the film may be sheared and displaced when passing through the ironing die, resulting in scraping of the surface of the film layer, which may easily cause pressed defects or streak-like defects due to the scraping debris.
  • the thickness of the can outer surface side film layer 21 of the film-laminated steel sheet 1 is 12 ⁇ m or more, the occurrence of pinholes can be further suppressed even if a strong shear force is applied to the surface of the film layer in DI forming.
  • the thickness of the can outer surface side film layer 21 is more preferably 15 ⁇ m or more.
  • the thickness of the film layer 21 on the outer surface of the can is more preferably 35 ⁇ m or less.
  • the thickness of the film layer on the side that becomes the can inner surface may be appropriately set to a thickness that provides sufficient retort corrosion resistance according to the corrosiveness of the can contents.
  • the thickness of the can inner surface side film layer 22 is set to 10 ⁇ m or more, so that good retort corrosion resistance can be obtained.
  • the thickness of the can inner surface side film layer 22 is preferable to make the thickness of the can inner surface side film layer 22 as thick as possible. For example, by setting the thickness of the can inner surface side film layer 22 to 20 ⁇ m or more, it is possible to ensure good retort corrosion resistance even when can contents that show strong corrosiveness are stored.
  • the thickness of the film layer 22 on the inner surface of the can exceeds 100 ⁇ m, the film may adhere to the punch during DI molding, making it difficult to slide, and the punch-ejection properties may decrease. Therefore, by making the thickness of the film layer 22 on the inner surface of the can 100 ⁇ m or less, it is possible to suppress the decrease in punch-ejection properties while ensuring good retort corrosion resistance.
  • the thickness of the film layer 22 on the inner surface of the can is more preferably 50 ⁇ m or less.
  • the thickness of the film layer as described above can be measured from the state of the film-laminated steel sheet 1 that has already been manufactured as follows. First, multiple sample pieces of 100 x 100 mm in size are taken from any position of the sheet-shaped or coil-shaped film-laminated steel sheet 1.
  • the thickness of the can outer surface film layer 21 for the obtained sample pieces first, the side of the can inner surface film layer 22 is scraped with sandpaper or the like, and then the film-laminated steel sheet 1 is immersed in 17% to 35% hydrochloric acid to dissolve the base steel sheet, and only the can outer surface film layer 21 is peeled off and extracted. Then, the thickness of the can outer surface film layer 21 can be measured at any three points while changing the position using a micrometer.
  • the average value of the three measured values obtained is taken as the thickness of the can outer surface film layer 21.
  • the side of the film layer 21 on the outer surface of the can is scraped off with sandpaper or the like for the obtained sample piece, and then the film-laminated steel sheet 1 is immersed in 17% to 35% hydrochloric acid to dissolve the base steel sheet, and only the film layer 22 on the inner surface of the can is peeled off and extracted. Then, the thickness of the film layer 22 on the inner surface of the can is measured at any three points while changing the position using a micrometer.
  • the average value of the three measured values obtained is regarded as the thickness of the film layer 22 on the inner surface of the can.
  • the wax layer in the film-laminated steel sheet 1 according to this embodiment is a layer provided on the film layer as described above, as shown diagrammatically in FIG. 1.
  • the amount of the wax layer applied has a large effect not only on the scraping and galling of the can outer surface side film layer 21 during DI forming, but also on the punch-ejectability. Therefore, in order to maintain the ironing formability during DI forming and further improve the punch-ejectability, the amount of the wax layer applied is an extremely important factor.
  • the wax layers provided on the inner and outer can surfaces of the film-laminated steel sheet 1 melt as the steel sheet temperature rises due to DI forming, forming a lubricating film on the surface of the laminated steel sheet (which can also be considered the surface of the film layer in this embodiment), thereby imparting good lubricity to the laminated steel sheet.
  • the wax that was melted during DI forming solidifies again and may remain on the surface of the film layer.
  • the amount of the wax layer attached is within the range of 0.030 to 0.135 g/ m2 per side, and the amount of the wax layer attached is different between the front side and the back side of the steel sheet.
  • the amount of the wax layer attached per side of 0.030 g/ m2 corresponds to the minimum amount of the wax layer attached on the side with a smaller amount of attachment
  • the amount of the wax layer attached per side of 0.135 g/ m2 corresponds to the maximum amount of the wax layer attached on the side with a larger amount of attachment.
  • the amount of wax layer 31 attached to the outer surface of the can and the amount of wax layer 32 attached to the inner surface of the can are each explained in detail below.
  • the amount of the wax layer 31 on the outer surface of the can is 0.030 g/m 2 or more. If the amount of the wax layer 31 on the outer surface of the can is less than 0.030 g/m 2 , the wax film is likely to break during the ironing process (the lubricating film is lost), and the film layer may be scraped or galled in the ironed portion on the outer surface of the can, which is not preferable.
  • the lubricating film can be prevented from being lost during the ironing process, and the film layer can be prevented from being scraped or galled in the ironed portion on the outer surface of the can.
  • the amount of the wax layer 31 on the outer surface of the can is preferably 0.040 g/m 2 or more, and more preferably 0.050 g/m 2 or more.
  • the amount of the wax layer 31 on the outer surface of the can is 0.100 g/m 2 or less, which is even less than the value of 0.135 g/m 2 mentioned above. If the amount of the wax layer 31 on the outer surface of the can exceeds 0.100 g/m 2 , excess wax accumulates in the gaps of the ironing die, and in the areas where the wax has accumulated thickly, stripes and dents tend to appear on the surface of the film layer, which is not preferable. By setting the amount of the wax layer 31 on the outer surface of the can to 0.100 g/m 2 or less, it is possible to prevent stripes and dents from appearing on the surface of the film layer.
  • the amount of the wax layer 31 on the outer surface of the can is preferably 0.095 g/m 2 or less, and more preferably 0.090 g/m 2 or less.
  • ⁇ Can inner surface wax layer 32 Regarding the amount of the wax layer 32 on the can inner surface side in the film-laminated steel sheet 1 according to the present embodiment, the inventors have obtained the following findings: That is, if the amount of the wax layer 32 on the can inner surface side is too large, the punch becomes slippery as the temperature of the punch increases during continuous can making, and strain is concentrated at the part of the can bottom where the punch shoulder comes into contact, causing breakage, which is called "punch shoulder breakage", and this is not preferable.
  • the can body will be difficult to remove from the punch when the punch returns from the bottom dead center to the top dead center.
  • the can body retreats with the punch, and the can end is likely to deform as it hits the stopper provided on the mold side hard. In some cases, the can body will buckle, making it necessary to interrupt the can making process, which is undesirable.
  • the inventors conducted further research and found that the above-mentioned buckling of the can body is likely to occur when the amount of wax layer 31 attached to the outside of the can is less than the amount of wax layer 32 attached to the inside of the can, and that the above-mentioned punch shoulder fracture is likely to occur when the amount of wax layer 32 attached to the inside of the can is greater than the amount of wax layer 31 attached to the outside of the can.
  • the amount of wax layer 32 on the inner surface of the can i.e., the wax layer on the surface with a larger amount of wax attached
  • the amount of wax layer 31 on the outer surface of the can i.e., the wax layer on the surface with a smaller amount of wax attached
  • the ratio of the amount of wax layer on the surface with a larger amount of wax attached divided by the amount of wax layer on the surface with a smaller amount of wax attached will be referred to as the "amount of wax attached ratio”.
  • the amount of the wax layer 31 on the outer side of the can is set to a range of 0.030 to 0.100 g/ m2
  • the amount of the wax layer 32 on the inner side of the can is set to a range of 1.05 to 1.35 times the amount of the wax layer 31 on the outer side of the can (in other words, the ratio of the amount of the wax layer 32 specified above is set to a range of 1.05 to 1.35).
  • the ironing formability during DI forming can be maintained, and the punch-ejectability can be further improved.
  • the continuous can-making property can be further improved in the production of DI cans.
  • the amount of wax layer 32 on the inner surface of the can is preferably 1.10 times or more the amount of wax layer 31 on the outer surface of the can, and more preferably 1.15 times or more the amount of wax layer 31 on the outer surface of the can.
  • the amount of wax layer 32 on the inner surface of the can is preferably 1.30 times or less the amount of wax layer 31 on the outer surface of the can, and more preferably 1.25 times or less the amount of wax layer 31 on the outer surface of the can.
  • the wax layer on the side of interest can be dissolved in a specified solvent and then the following process can be carried out.
  • sample pieces for example 200 mm x 200 mm in size
  • a tape seal is applied to the surface of the wax layer on the side not of interest.
  • a solvent capable of dissolving wax e.g., n-heptane, etc.
  • the poured solvent is collected in an aluminum foil case (e.g., Toyo Aluminium Eco Products Co., Ltd. foil case No. S736210, deep opening, 11 ⁇ m thick, mass: approximately 0.38 g) whose mass has been measured in advance using a precision balance.
  • the aluminum foil case containing the solvent in which the wax has been dissolved is placed in a thermostatic bath at 100°C for 30 minutes to completely volatilize the solvent.
  • the mass of the aluminum foil case from which the solvent has been volatilized is then measured using a precision balance.
  • the mass of the wax can be calculated by subtracting the mass of the aluminum foil case before the solvent recovery from the mass obtained in this way.
  • the mass of the wax thus obtained is divided by the area of the sample (converted into m2 ) to determine the amount of the wax layer attached on the surface of interest.
  • the amount of the wax layer may be in the range of more than 0.120 g/ m2 and not more than 0.135 g/ m2 per side. Even in a high-amount state where the amount of the wax layer per side exceeds 0.120 g/ m2 , the film-laminated steel sheet 1 according to the present embodiment can further improve the punch-ejectability while maintaining the ironing formability during DI forming.
  • the amount of the wax layer per side of 0.120 g/ m2 corresponds to the minimum amount of the wax layer on the side with a smaller amount of wax, and the amount of the wax layer per side of 0.135 g/ m2 corresponds to the maximum amount of the wax layer on the side with a larger amount of wax.
  • the wax has a certain degree of hardness.
  • the hardness of the wax can be expressed by the penetration defined in JIS K2235:2022-Item 6.4.
  • the wax constituting the wax layer according to this embodiment has a too large penetration, it means that the viscosity of the wax is low. In this case, when the temperature of the mold rises during continuous can manufacturing, the lubricity of the wax decreases, making it easier for scraping and galling of the film layer to occur. However, by using a wax with a penetration of 20 or less at a test temperature of 25°C, scraping and galling of the film layer caused by the viscosity of the wax as described above can be prevented. Therefore, in the wax layer according to this embodiment, it is preferable that the wax constituting the wax layer has a penetration of 20 or less at a test temperature of 25°C. It is more preferable that the wax has a penetration of 15 or less at a test temperature of 25°C.
  • the penetration of the wax can be measured according to JIS K2235:2022.
  • the melting point of the wax constituting the wax layer is more preferably 52.0°C or higher.
  • the melting point of the wax that constitutes the wax layer as described above can be measured by differential scanning calorimetry in the same manner as the melting point of the thermoplastic polyester that constitutes the film layer described above.
  • the wax layer according to this embodiment it is more preferable to select a wax having an appropriate penetration and melting point from among the waxes exemplified above, taking into consideration the removability of the wax after can manufacturing as described above.
  • a steel sheet that will be the base material of the film-laminated steel sheet 1 is prepared.
  • the manufacturing method of the steel sheet that will be the base material is not particularly limited, and it can be manufactured by various known methods.
  • it is possible to realize a desired surface roughness on the surface of the steel sheet by adjusting the surface roughness of the rolling roll used in the surface temper rolling process when manufacturing the base steel sheet.
  • a commercially available steel sheet having the desired characteristics may be purchased and used as the base steel sheet.
  • the base steel sheet thus obtained is subjected to various pretreatments such as alkaline degreasing treatment, water washing treatment, pickling treatment, etc., as necessary, to obtain a clean steel sheet surface. Then, a film layer is formed on the front and back surfaces of the base steel sheet using a thermoplastic polyester film.
  • thermoplastic polyester film used to form the film layer may be manufactured using various known manufacturing methods to have the desired properties, or a commercially available product with the desired properties may be purchased, or a commercially available thermoplastic polyester film may be purchased and then further treated using various known processing methods to achieve the desired properties.
  • thermal fusion method in which the steel strip is heated by passing it through a jacket roll with a built-in heater or an induction heating (IH) furnace, and then the film is continuously fed from both sides of the steel strip and pressed onto the steel strip with a heat-resistant rubber roll to fuse the film.
  • IH induction heating
  • the base steel sheet prefferably heats the base steel sheet to a temperature of (film melting point + 15°C) or higher, and set the surface temperature of the film lamination roll to a temperature within the range of (film glass transition point (Tg) + 30°C) or higher and (film glass transition point (Tg) + 20°C) or lower.
  • the surface hardness of the film lamination roll is preferably controlled within a range of 30 to 80° as measured by a durometer type A specified in JIS K6253-3: 2012.
  • the nip pressure of the film lamination roll is preferably set within a range of 100 to 300 N/ cm2 .
  • a wax layer is formed on the steel plate on which the film layer has been formed.
  • the method for forming the wax layer is not particularly limited, and the wax layer may be formed by applying wax in a liquid state by heating it to the melting point or higher to the surface of the film layer, or a wax solution in which wax is dissolved in a volatile solvent may be prepared and applied to the surface of the film layer.
  • the steel sheet after the wax application may be dried by heating or naturally dried.
  • the wax layer As mentioned above, from the viewpoint of ensuring productivity, it is simplest to adopt a method in which, in a continuous production line for producing film-laminated steel sheets, the wax is heated to above its melting point, melted, and applied to the surface of the film layer using a roll coater, and then air-cooled before being wound up onto the steel sheet.
  • the film-laminated steel sheet 1 according to the present embodiment can be drawn and ironed using a commercially available cupping press and a DI forming device. More specifically, the film-laminated steel sheet described above is used as a material for a DI can, and the film-laminated steel sheet is arranged so that the side of the film-laminated steel sheet with a smaller amount of wax layer becomes the outer surface of the DI can, and the side of the film-laminated steel sheet with a larger amount of wax layer becomes the inner surface of the DI can. Then, the film-laminated steel sheet is subjected to DI forming. The conditions for DI forming are not particularly specified, and the film-laminated steel sheet is subjected to DI forming under general conditions for DI forming.
  • a wax layer is provided in advance on the film layer, and furthermore, since both the ironing formability and the punch-ejectability during DI forming are ensured and the punch-ejectability is further improved, DI forming can be performed satisfactorily without a coolant. Furthermore, when DI forming the film-laminated steel sheet 1 according to this embodiment, a coolant used in normal DI forming may be used in combination.
  • the conditions during DI forming are not particularly limited.
  • the ends of the DI-formed can bodies are trimmed to the desired shape and then flanged up to obtain DI cans.
  • the ends of the DI-formed can bodies are trimmed to the desired shape.
  • letterpress offset printing or flat offset printing is performed on the can body using a curved printing machine, the printing is baked, and the ends of the can are flanged up to obtain DI cans.
  • the lids are rolled up to seal the DI cans.
  • the manufacturing method of the film-laminated steel sheet and DI can according to this embodiment will be specifically explained with reference to examples.
  • the conditions in the examples shown below are merely examples of conditions adopted to confirm the feasibility and effects of the present invention, and the present invention is not limited to the examples below.
  • the present invention can adopt various conditions, all of which are included in the technical features of the present invention.
  • one side of the base steel plate is referred to as the "first side”
  • the side opposite to the first side is referred to as the "second side”.
  • the base steel plate was handled so that the first side was the side with a smaller amount of wax layer attached, and the second side was the side with a larger amount of wax layer attached.
  • a sample measuring 200 mm x 200 mm was cut from each base steel plate, and the arithmetic mean roughness Ra was measured three times at three diagonal points on the sample in both the coil longitudinal direction and the coil width direction at a sweep speed of 0.3 mm/sec using a Surfcom 570A surface roughness and shape measuring instrument manufactured by Tokyo Seiki Co., Ltd. The average of the measured values was taken as the surface roughness Ra of each base steel plate.
  • Table 1 The results are shown in Table 1.
  • F1 is a biaxially stretched film of ethylene dimethyl terephthalate/ethylene dodecanedioic acid copolymer resin (DMT/DDA-EG) having a melting point of 210° C., a thickness of 25 ⁇ m, and an elongation of 200%.
  • F2 is a biaxially stretched film of ethylene terephthalate-butylene terephthalate copolymer resin (PET-PBT) having a melting point of 213° C., a thickness of 25 ⁇ m, and an elongation of 190%.
  • DMT/DDA-EG ethylene dimethyl terephthalate/ethylene dodecanedioic acid copolymer resin
  • PET-PBT ethylene terephthalate-butylene terephthalate copolymer resin
  • F3 is a biaxially stretched film of ethylene terephthalate-butylene terephthalate copolymer resin (PET-PBT) having a melting point of 215° C., a thickness of 25 ⁇ m, and an elongation of 190%.
  • F4 is a biaxially stretched film of ethylene terephthalate-butylene terephthalate copolymer resin (PET-PBT) having a melting point of 218° C., a thickness of 12 ⁇ m, and an elongation of 190%.
  • F5 is a biaxially stretched film of ethylene terephthalate-ethylene isophthalate copolymer resin (PET-IA) having a melting point of 227° C., a thickness of 19 ⁇ m, and an elongation of 160%.
  • F6 is a biaxially stretched film of ethylene terephthalate-ethylene isophthalate copolymer resin (PET-IA) having a melting point of 227° C., a thickness of 40 ⁇ m, and an elongation of 180%.
  • F7 is a biaxially stretched film of ethylene terephthalate-ethylene isophthalate copolymer resin (PET-IA) having a melting point of 240° C., a thickness of 30 ⁇ m, and an elongation of 130%.
  • PET-IA ethylene terephthalate-ethylene isophthalate copolymer resin
  • F8 is a biaxially stretched film of polyethylene terephthalate resin (PET) having a melting point of 242° C., a thickness of 20 ⁇ m, a stretch ratio of 2.9, and an elongation of 100%.
  • F9 is a biaxially stretched film of polyethylene terephthalate resin (PET) having a melting point of 253° C., a thickness of 20 ⁇ m, a stretch ratio of 3.0, and an elongation of 100%.
  • F10 is a biaxially stretched film of polyethylene terephthalate resin (PET) having a melting point of 258° C., a thickness of 19 ⁇ m, a stretch ratio of 3.1, and an elongation of 100%.
  • F11 is a biaxially stretched film of polyethylene terephthalate resin (PET) having a melting point of 262° C., a thickness of 19 ⁇ m, a stretch ratio of 3.3, and an elongation of 100%.
  • F12 is a biaxially stretched film of ethylene terephthalate-butylene terephthalate copolymer resin (PET-PBT) having a melting point of 212° C., a thickness of 10 ⁇ m, and an elongation of 190%.
  • F13 is a biaxially stretched film of ethylene terephthalate-ethylene isophthalate copolymer resin (PET-IA) having a melting point of 227° C., a thickness of 42 ⁇ m, and an elongation of 200%.
  • F14 is a biaxially stretched film of ethylene terephthalate-ethylene isophthalate copolymer resin (PET-IA) having a melting point of 227° C., a thickness of 50 ⁇ m, and an elongation of 200%.
  • F15 is a biaxially stretched film of ethylene terephthalate-ethylene isophthalate copolymer resin (PET-IA) having a melting point of 227° C., a thickness of 100 ⁇ m, and an elongation of 200%.
  • a sample of 5-8 mg was taken from the resin film and sealed in an aluminum pan. Using a differential scanning calorimeter (DSC7030, Hitachi High-Tech Science Corporation), measurements were performed in the range of 50-350°C at a heating rate of 10°C/min, and the temperature of the main endothermic peak was taken as the melting point of each resin film.
  • DSC7030 differential scanning calorimeter
  • a film layer was formed on the front and back surfaces of the base steel sheet.
  • a dedicated resin film laminating device was used, which was equipped with a metal sheet supplying device, a metallic heating hot press for heating the metal sheet, a film supplying device for the front and back surfaces, a heat-resistant rubber laminating roll (the rubber roll surface temperature was controlled by a metallic heating backup roll), and a cooling water tank.
  • a metal sheet supplying device for the metal sheet
  • a film supplying device for the front and back surfaces a heat-resistant rubber laminating roll (the rubber roll surface temperature was controlled by a metallic heating backup roll), and a cooling water tank.
  • a heat-resistant rubber laminating roll the rubber roll surface temperature was controlled by a metallic heating backup roll
  • a cooling water tank Using this device, multiple steel sheets (sheet width 200 mm x sheet length 200 mm) on which a film layer was formed were produced at each of the levels shown in Tables 4-1 and 4-2 below.
  • W1 is a paraffin wax with a penetration of 29 at 25°C and a melting point of 48.0°C.
  • W2 is a paraffin wax with a penetration of 22 at 25°C and a melting point of 50.0°C.
  • W3 is a paraffin wax having a penetration of 20 at 25°C and a melting point of 50.0°C.
  • W4 is a paraffin wax having a penetration of 15 at 25°C and a melting point of 52.0°C.
  • W5 is a paraffin wax with a penetration of 13 at 25°C and a melting point of 66.3°C.
  • W6 is a paraffin wax with a penetration of 11 at 25°C and a melting point of 69.4°C.
  • W7 is a paraffin wax with a penetration of 5 at 25°C and a melting point of 75.0°C.
  • W8 is a candelilla wax with a penetration of 1 at 25°C and a melting point of 65.0°C.
  • W9 is a carnauba wax with a penetration of 1 at 25°C and a melting point of 82.0°C.
  • the penetration of each of the waxes at 25°C was measured using an automatic penetration measuring device EX-210ED manufactured by Daiichi Rikagaku Co., Ltd.
  • the melting point of each of the waxes was measured using a differential scanning calorimeter (DSC7030 manufactured by Hitachi High-Tech Science Corporation) in the same manner as for the resin film, using 5-8 mg samples taken from each wax.
  • the measurement conditions were a heating rate of 10°C/min and a measurement temperature range of 50-350°C.
  • the temperature of the main endothermic peak was taken as the melting point of each wax.
  • wax-hexane a commercially available general reagent
  • the steel plate that had been tape sealed as described above was immersed in a wax-hexane solution and then allowed to dry naturally.
  • the amount of the wax layer attached was measured as follows. First, for each level of film-laminated steel plate (size 200 mm x 200 mm), a commercially available tape that does not dissolve in heptane was used to tape seal the side on which the adhesion amount was not measured. The tape sealing was prepared so that the side on which the adhesion amount was not measured and the side were covered, and the side on which the adhesion amount was measured was also covered in an area of 5 mm from both ends in the width and length directions. With this tape sealing, the size of the area not tape-sealed on the side on which the adhesion amount was measured was 190 mm x 190 mm.
  • the conditions of the ironing were a one-stage drawing ratio of 1.75, a two-stage drawing ratio of 1.35, an ironing punch diameter of 52.80 mm, and a total ironing rate of 48%, and cans with a can height of 100 mm or more were produced.
  • the colored ERV test was carried out as follows. First, the inner surface of the can was washed with hexane to remove the wax, and then the can was filled with an ERV test solution (ERV test solution composition: CuSO 4 ⁇ 5H 2 O [50 g/L], NaCl [60 g/L]). Next, the positive electrode bar of a digital enamel rate meter (manufactured by Nichia Measurement Industries Co., Ltd., Digital Enamel Rater NDE-1200) was immersed in the solution, the negative electrode was connected to the can side, and a current of 6.3 V was applied for 15 seconds to precipitate copper sulfate crystals on the exposed metal part. Then, the damage state of the film surface on the inner surface of the can was visually judged.
  • ERV test solution composition CuSO 4 ⁇ 5H 2 O [50 g/L], NaCl [60 g/L]
  • the positive electrode bar of a digital enamel rate meter manufactured by Nichia Measurement Industries Co.,
  • the film-laminated steel sheets corresponding to the examples of the present invention were good in both DI formability and the degree of film damage, while the film-laminated steel sheets corresponding to the comparative examples of the present invention were poor in at least either DI formability or the degree of film damage.
  • the film-laminated steel sheets corresponding to the examples of the present invention are excellent in drawing and ironing processability in DI forming, and in particular in punch release properties, so that can body buckling during continuous forming is unlikely to occur and they have excellent continuous DI formability, making them extremely useful.
  • Base steel sheet 21 Film layer on outer surface of can 22 Film layer on inner surface of can 31 Wax layer on outer surface of can 32 Wax layer on inner surface of can

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JP2009023193A (ja) 2007-07-19 2009-02-05 Nippon Steel Corp 打ち抜き絞り製缶作業性に優れた容器用ラミネート鋼板及びそれを製造するためのラミネートロール
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JP2009184262A (ja) 2008-02-07 2009-08-20 Jfe Steel Corp ２ピース缶体用ラミネート金属板および２ピースラミネート缶体
JP2010023442A (ja) * 2008-07-24 2010-02-04 Toyobo Co Ltd フィルムラミネート金属板
JP2015003450A (ja) * 2013-06-21 2015-01-08 東洋製罐株式会社 熱可塑性樹脂被覆金属板及びこれから成る缶体並びに缶蓋
WO2017155099A1 (ja) * 2016-03-10 2017-09-14 新日鐵住金株式会社 容器用金属板およびその製造方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002264258A (ja) * 2001-03-14 2002-09-18 Nkk Corp 容器用フィルムラミネート金属板
JP2004106246A (ja) * 2002-09-17 2004-04-08 Nippon Steel Corp 絞りしごき加工缶用樹脂被覆鋼板および缶体
JP2009023193A (ja) 2007-07-19 2009-02-05 Nippon Steel Corp 打ち抜き絞り製缶作業性に優れた容器用ラミネート鋼板及びそれを製造するためのラミネートロール
JP2009078543A (ja) * 2007-09-07 2009-04-16 Toyobo Co Ltd 絞りしごき缶被覆用フイルム
JP2009090492A (ja) * 2007-10-04 2009-04-30 Sakuranomiya Kagaku Kk 積層板およびシームレス缶
JP2009184262A (ja) 2008-02-07 2009-08-20 Jfe Steel Corp ２ピース缶体用ラミネート金属板および２ピースラミネート缶体
JP2010023442A (ja) * 2008-07-24 2010-02-04 Toyobo Co Ltd フィルムラミネート金属板
JP2015003450A (ja) * 2013-06-21 2015-01-08 東洋製罐株式会社 熱可塑性樹脂被覆金属板及びこれから成る缶体並びに缶蓋
WO2017155099A1 (ja) * 2016-03-10 2017-09-14 新日鐵住金株式会社 容器用金属板およびその製造方法

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