WO2024004775A1 - 缶容器 - Google Patents
缶容器 Download PDFInfo
- Publication number
- WO2024004775A1 WO2024004775A1 PCT/JP2023/022879 JP2023022879W WO2024004775A1 WO 2024004775 A1 WO2024004775 A1 WO 2024004775A1 JP 2023022879 W JP2023022879 W JP 2023022879W WO 2024004775 A1 WO2024004775 A1 WO 2024004775A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- container
- layer
- resin
- printed image
- reduced diameter
- Prior art date
Links
- 239000002966 varnish Substances 0.000 claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 claims abstract description 30
- 229920005989 resin Polymers 0.000 claims description 126
- 239000011347 resin Substances 0.000 claims description 126
- 239000000203 mixture Substances 0.000 claims description 43
- 238000007639 printing Methods 0.000 claims description 37
- 229910003460 diamond Inorganic materials 0.000 claims description 34
- 239000010432 diamond Substances 0.000 claims description 34
- 229910052751 metal Inorganic materials 0.000 claims description 29
- 239000002184 metal Substances 0.000 claims description 29
- 229920001225 polyester resin Polymers 0.000 claims description 15
- 239000004645 polyester resin Substances 0.000 claims description 15
- 229920005992 thermoplastic resin Polymers 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
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- 239000004925 Acrylic resin Substances 0.000 description 9
- 229920000178 Acrylic resin Polymers 0.000 description 9
- 239000003822 epoxy resin Substances 0.000 description 9
- 239000003960 organic solvent Substances 0.000 description 9
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
-
- 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
- B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
- B65D25/34—Coverings or external coatings
-
- 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
- B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
Definitions
- the present invention relates to can containers.
- Patent Document 1 discloses that by applying varnish to the neck portion of the can body after drawing, the frictional force between the can body and the die-necking tool is reduced, and the buckling of the can body is reduced. It has been described that it suppresses damage to molds and molds.
- the manufacturing method may include forming a reduced diameter portion with a die necking tool at one end of the can body on which the varnish layer is not formed.
- a coefficient of dynamic friction between the die necking tool and the can body may be 0.30 or less.
- a resin layer containing a thermoplastic resin is formed on the outer surface of at least one end portion of the can body where the reduced diameter portion is formed.
- thermoplastic resin may be a polyester resin.
- Any of the above manufacturing methods may further include the step of heating the can body in which the diameter-reduced portion is formed to soften the resin layer.
- a smooth diamond film may be formed on at least a portion of the portion of any of the die necking tools that comes into contact with the can body.
- any of the die necking tools described above may have a centering part that is inserted into the inside of the can body, and an insert part that contacts the can body from the outside to shape the can body.
- a surface of at least one of the insert portion and the centering portion that comes into contact with the can body may have the smooth diamond film.
- Any of the above manufacturing methods may include the step of forming the can body together with the bottom by drawing a metal plate.
- Any of the manufacturing methods described above may include the step of printing an ink composition on the surface of the can body on which the reduced diameter portion is formed to form a printed image layer.
- the can container includes a can body, a bottom provided on one end side of the can body, and The can body may include a reduced diameter portion having a reduced outer diameter on the other end side.
- a varnish layer may not be formed on at least the outer surface of the reduced diameter portion.
- a resin layer containing a thermoplastic resin may be formed on the metal ground on the outer surface of the reduced diameter portion.
- thermoplastic resin may be a polyester resin.
- a printed image layer may be formed on the resin layer.
- a printed image layer may be directly formed on the metal surface.
- An example of a sketch of a can container before image printing in this embodiment is shown.
- An example of a sketch of a can container after image printing in this embodiment is shown.
- An example of the overall layered structure of the can container in this embodiment is shown.
- An example of the overall layered structure of the can container in this embodiment is shown.
- An example of the overall layered structure of the can container in this embodiment is shown.
- An example of the overall layered structure of the can container in this embodiment is shown.
- An example of the overall layered structure of the can container in this embodiment is shown.
- An example of the overall layered structure of the can container in this embodiment is shown.
- An example of the overall layered structure of the can container in this embodiment is shown.
- An example of the flow of the manufacturing method by wet molding of can containers according to the present embodiment is shown.
- An example of the flow of wet molding in S10 in this embodiment is shown.
- An example of the component configuration of the die necking tool used in this embodiment is shown.
- An example of the flow of neck processing in S40 in this embodiment is shown.
- An example of the flow of the manufacturing method by dry molding of can containers according to the present embodiment is shown.
- An example of the flow of dry molding in S110 in this embodiment is shown.
- An example of a flow for forming a receptor layer in this embodiment is shown.
- An example of a flow for forming a base image layer in this embodiment is shown.
- FIG. 1 shows an example of a sketch of a can container 50 before image printing in this embodiment.
- the can container 50 according to the present invention can be necked while protecting the surface of the can container 50 without applying varnish.
- the can container 50 includes a reduced diameter portion 100 provided on one end side, a can body portion 200, and a bottom portion 250 provided on the other end side.
- the reduced diameter portion 100 is a portion where the outer diameter of one end of the can container 50 is reduced.
- the reduced diameter portion 100 may be provided at the opening of the can container 50.
- the reduced diameter portion 100 may be formed by necking the can container 50.
- the reduced diameter portion 100 may be formed such that its outer diameter gradually decreases as it approaches one end of the can container 50. Further, the reduced diameter portion 100 may have a flange 101 formed at the same time as the neck processing. The formed flange 101 allows a can lid to be attached.
- the can body 200 occupies most of the can container 50 except for the reduced diameter portion 100.
- the can body 200 may have a substantially constant outer diameter in the longitudinal direction of the can container 50.
- the can body part 200 has a larger surface area on the outer peripheral surface than the reduced diameter part 100 and has a substantially constant outer diameter, so it is suitable for printing on the surface of the can container 50.
- the bottom portion 250 is a portion provided on the other end side of the can container 50.
- the bottom portion 250 is a portion that is grounded when the can container 50 is made to stand on its own.
- the bottom portion 250 may have a constant outer diameter or may have a reduced diameter.
- the shape of the bottom portion 250 is not particularly limited.
- FIG. 2 shows an example of a sketch of the can container 50 after image printing in this embodiment.
- the can container 50 may include a reduced diameter portion 100 provided on one end side, a can body portion 200, a bottom portion 250 provided on the other end side, and a printing portion 300.
- the printed portion 300 is an area printed on at least a portion of the outer peripheral surface of the can container 50 using an ink composition.
- the printing section 300 may be provided on the can body 200 of the can container 50.
- the printing section 300 may be provided on the reduced diameter section 100 of the can container 50 (not shown).
- the printing unit 300 may be provided on the bottom 250 of the can container 50 (not shown).
- FIG. 3 shows an example of the overall layered structure of the can container 50 in this embodiment.
- the can container 50 may include the can body 1 and the printed image layer 3 as a layered structure including the reduced diameter portion 100, the can body portion 200, and the bottom portion 250.
- the can body 1 is the main body of the can container 50 and houses most of the contents.
- the can body 1 is formed into a cylindrical shape and has an outer peripheral surface.
- the can body 1 may be either a seamless can or a welded can.
- the material of the can body 1 may be either an aluminum can or a steel can, but is not limited to these.
- the printed image layer 3 is a layer of images expressing characters, patterns, etc. on the outer peripheral surface of the can container 50.
- the printed image layer 3 may be directly formed on all or at least a portion of the outer peripheral surface of the metal ground of the can body 1.
- the printed image layer 3 may constitute a printing section 300 in the can container 50.
- the printed image layer 3 may be a layer printed on all or at least a portion of the can body 1 using an ink composition.
- the printed image layer 3 may be a layer printed on the can container 50 using an ink composition.
- the ink composition may be, but is not limited to, an aqueous ink, a solvent ink, an ultraviolet curable ink, or an electron beam curable ink.
- the image formed on the printed image layer 3 may be a color image using ink compositions of multiple colors.
- the image formed on the printed image layer 3 may be a monochrome image using an ink composition of one color.
- the printed image layer 3 may be provided on the can body 1 by inkjet printing.
- the printed image layer 3 is provided on the can body 1 by direct inkjet printing.
- the printed image layer 3 is provided on the can body 1 by offset inkjet printing. Details of these inkjet printing methods will be described later.
- the can container 50 of the embodiment shown in FIG. 3 has a minimum necessary configuration including a can body 1 and a printed image layer 3. Normally, a varnish layer is formed between the can body 1 and the printed image layer 3 in order to prevent the can body 1 from buckling or being damaged during neck processing, but in this embodiment, a varnish layer is formed between the can body 1 and the printed image layer 3.
- the can container 50 does not have a varnish layer. Therefore, the can container 50 of this embodiment can reduce the number of steps and cost for forming the varnish layer. Further, in the can container 50 of the present embodiment, since a varnish layer is not formed between the can body 1 and the printed image layer 3, even if the can body 1 is printed using an ink composition, the ink composition is not repelled. It is possible to have an image with excellent image quality without any problems.
- FIG. 4 shows an example of the overall layered structure of the can container 50 in this embodiment.
- the can container 50 may include a can body 1, a printed image layer 3, and a varnish layer 2 as a layered structure. Note that unless otherwise specified, the descriptions already described may be applied as is to the description of each layer.
- the varnish layer 2 protects the printed image layer 3 from external impacts.
- the varnish layer 2 may be provided on at least one of the can body 200 and the bottom 250 of the can container 50.
- the varnish layer 2 may be provided on all or at least part of the printed image layer 3.
- the varnish layer 2 does not need to be provided on at least the outer surface of the reduced diameter portion 100 of the can container 50.
- the thickness of the varnish layer 2 may be 0.5 ⁇ m or more and 15 ⁇ m or less. When the thickness of the varnish layer 2 is within the above range, the printed image layer 3 can be appropriately protected.
- the varnish layer 2 may have a resin component.
- the varnish layer 2 may be formed by applying a solution prepared by dissolving a resin component in an organic solvent and baking the solution. A solution obtained by dissolving the resin component in an organic solvent may be applied to all or at least a portion of the outer surface of the printed image layer 3.
- the resin component of the varnish layer 2 may include a thermosetting acrylic resin, a thermosetting epoxy resin, or a thermosetting polyester resin. Baking may be performed with heat, air, ultraviolet radiation or electron beam radiation.
- the varnish layer 2 protects the printed image on the printed image layer 3 from deterioration due to physical impact, oxygen, moisture, etc., and improves durability. be able to. Further, by providing the varnish layer 2, color transfer of the printed image on the printed image layer 3 can be prevented. Further, by providing the varnish layer 2, the surface of the can container 50 can be made smooth. Furthermore, in the can container 50 of this embodiment, since a varnish layer is not formed between the can body 1 and the printed image layer 3, even if the can body 1 is printed using the ink composition, the ink composition is not applied. It is possible to have an image with excellent image quality without flicking.
- the can container 50 of the embodiment shown in FIG. 4 by providing the varnish layer 2, the printed image of the printed image layer 3 is appropriately protected and can have improved durability. Moreover, the can container 50 of the embodiment shown in FIG. 4 can have an image of the printed portion 300 with excellent image quality by appropriately protecting the printed image of the printed image layer 3.
- FIG. 5 shows another example of the overall layered structure of the can container 50 in this embodiment.
- the can container 50 may include a can body 1 , a resin layer 8 , and a printed image layer 3 .
- the resin layer 8 has the role of improving the slipperiness of the can container 50 and preventing the surface from being damaged during processing of the can container 50.
- the resin layer 8 may be provided on all or at least a portion of the outer peripheral surface of the metal ground of the can body 1.
- the resin layer 8 may be provided on all or part of at least the outer surface of the reduced diameter portion 100 of the can container 50.
- the printed image layer 3 may be provided on all or at least a portion of the resin layer 8.
- the printed image layer 3 may be a layer in which all or at least a portion of the resin layer 8 is printed using an ink composition.
- the resin contained in the resin layer 8 may include a thermoplastic resin.
- the resin layer 8 may include a structure made of polyester resin.
- the resin layer 8 may include a structure derived from isophthalic acid.
- the resin layer 8 may include a polyester resin containing a structure derived from isophthalic acid in its unit structure.
- the resin contained in the resin layer 8 may include a thermosetting acrylic resin, a thermosetting epoxy resin, a thermosetting polyurethane resin, or a thermosetting polyester resin instead of the thermoplastic resin. It's fine.
- the resin layer 8 can have appropriate slipperiness and exhibit excellent properties in strength and adhesion to the can body 1.
- the thickness of the resin layer 8 may be 0.5 ⁇ m or more and 30 ⁇ m or less. By having the thickness of the resin layer 8 within the above range, the slipperiness of the can container 50 can be improved and printing with excellent image quality can be performed. When the thickness of the resin layer 8 is less than 0.5 ⁇ m, the surface of the resin layer 8 becomes difficult to slip, so when forming the reduced diameter portion 100 on the can container 50, the can container 50 may be damaged or the can container may be damaged. There is a risk that metal powder may adhere to the mold for forming the reduced diameter portion 100 of 50. If the thickness of the resin layer 8 exceeds 30 ⁇ m, there is a risk that resin adhesion after neck processing and flange processing may be poor.
- the dynamic friction coefficient of the surface of the resin layer 8 may be 0.30 or less.
- the above dynamic friction coefficient can be realized by the resin layer 8.
- the dynamic friction coefficient of the surface of the resin layer 8 may be adjusted to 0.30 or less by subjecting the resin layer 8 to a surface treatment such as atmospheric pressure plasma treatment or corona treatment, if necessary. If the coefficient of dynamic friction on the surface of the resin layer 8 exceeds 0.30, the sliding property between the die necking tool and the die necking tool during neck processing will be poor, and the load during molding will be unevenly applied to the processed part, causing the can body 200 to sit. There is a risk of succumbing.
- Providing the resin layer 8 on the can body 1 prevents damage to the can container 50 when forming the reduced diameter portion 100 on the can container 50 and prevents damage to the can container 50 when forming the reduced diameter portion 100 of the can container 50. It is possible to prevent metal powder from adhering to the mold. Furthermore, the flexibility and flexibility of the resin layer 8 has the effect of providing excellent adhesion to the can body 1 and the printed image layer 3.
- the can container 50 of the embodiment shown in FIG. It is possible to prevent metal powder from adhering to the mold used for molding. Normally, a varnish layer is formed on the can body 1 to prevent the can body 1 from buckling or being scratched during neck processing, so an ink composition is applied to the can body 1. When printing, there was a risk of repelling the ink composition. However, in the can container 50 of the embodiment shown in FIG. 5, the resin layer 8 is provided without the varnish layer, so that when printing using the ink composition on the resin layer 8, the ink composition is not applied. It is possible to have an image with excellent image quality without flickering.
- FIG. 6 shows another example of the overall layered structure of the can container 50 in this embodiment.
- the can container 50 may include a can body 1 , a resin layer 8 , a printed image layer 3 , and a varnish layer 2 .
- the resin layer 8 has the role of improving the slipperiness of the can container 50 and preventing the surface from being damaged during processing of the can container 50.
- the resin layer 8 may be provided on all or at least a portion of the outer peripheral surface of the metal ground of the can body 1.
- the resin layer 8 may be provided on all or part of at least the outer surface of the reduced diameter portion 100 of the can container 50.
- the printed image layer 3 may be provided on all or at least a portion of the resin layer 8.
- the varnish layer 2 is a layer that protects the printed image layer 3 from external impacts.
- the varnish layer 2 may be provided on all or at least part of the printed image layer 3.
- the varnish layer 2 does not need to be provided on at least the outer surface of the reduced diameter portion 100 of the can container 50.
- the can container 50 of the embodiment shown in FIG. 6 is provided with the resin layer 8, so that the can container 50 is not damaged when the can container 50 is reduced in diameter, and the diameter reduction part 100 of the can container 50 is not formed. It is possible to prevent metal powder from adhering to the mold used for molding. Moreover, in the can container 50 of the embodiment shown in FIG. 6, by providing the varnish layer 2, the printed image of the printed image layer 3 can be appropriately protected and can have improved durability. Furthermore, since the can container 50 of the embodiment shown in FIG. 6 is provided with the resin layer 8, the ink composition is not repelled when the ink composition is printed on the resin layer 8, and the image quality is excellent. Can have images.
- FIG. 7 shows another example of the overall layered structure of the can container 50 in this embodiment.
- the can container 50 may include a can body 1 , a resin layer 8 , a receiving layer 7 , and a printed image layer 3 .
- the receiving layer 7 is a layer that receives the ink composition contained in the printed image layer 3.
- the receptive layer 7 may be a porous layer.
- the resin layer 8, the receptor layer 7, and the printed image layer 3 may be provided on all or at least a portion of the outer peripheral surface of the can container 50.
- the printed image layer 3 may be provided on all or at least part of the receiving layer 7.
- the resin layer 8 does not need to be provided on the can container 50.
- the receptor layer 7 is a porous layer, the ink composition may penetrate into the receptor layer 7 when printing is performed using the ink composition. Therefore, as shown in FIG. 7, the printed image layer 3 does not necessarily have to be layered on the receptor layer 7.
- the thickness of the receiving layer 7 may be 0.1 ⁇ m or more and 50 ⁇ m or less. When the thickness of the receiving layer 7 is within the above range, the ink composition contained in the printed image layer 3 can be appropriately received.
- the receptor layer 7 may be formed by applying a solution prepared by dissolving a resin component in an organic solvent and baking the solution.
- a solution prepared by dissolving the resin component in an organic solvent may be applied to all or at least a portion of the outer surface of the can body 1 or the resin layer 8 .
- the resin component of the receptor layer 7 may include a thermosetting acrylic resin, a thermosetting epoxy resin, a thermosetting polyurethane resin, or a thermosetting polyester resin. Baking may be performed with heat, air, ultraviolet radiation or electron beam radiation.
- the receptor layer 7 By additionally providing the receptor layer 7 on all or at least part of the can body 1 or the resin layer 8, the receptor layer 7 firmly holds and fixes the printed image layer 3 provided thereon, and the can body 1 and the printed image layer 3, or between the resin layer 8 and the printed image layer 3. Further, by providing the receptor layer 7, the can container 50 can have an image with better image quality.
- the can container 50 of the embodiment shown in FIG. 7 can have an image with better image quality by providing the receptor layer 7. Furthermore, since the resin layer 8 of the can container 50 of the embodiment shown in FIG. It is possible to prevent metal powder from adhering to the mold for forming the diameter portion 100.
- FIG. 8 shows another example of the overall layered structure of the can container 50 in this embodiment.
- the can container 50 may include a can body 1 , a resin layer 8 , a base image layer 6 , and a printed image layer 3 .
- the base image layer 6 serves as a base on which the printed image layer 3 is laminated.
- the base image layer 6 may be a layer obtained by forming a base on all or at least a portion of the can body 1 or the resin layer 8, and further printing on the base using an ink composition.
- the resin layer 8, the printed image layer 3, and the base image layer 6 may be provided on all or at least a portion of the outer peripheral surface of the can container 50.
- the resin layer 8 does not need to be provided on the can container 50.
- the base may contain an acrylic resin, an epoxy resin, a polyurethane resin, a rosin-modified phenol resin, a polyester resin, a petroleum resin, a ketone resin, a rosin-modified maleic resin, an amino resin, or a benzoguanamine resin.
- the printed image layer 3 may be provided on all or at least a portion of the underlying image layer 6.
- the base of the base image layer 6 may be formed by applying a solution in which a resin component is dissolved in an organic solvent and baking the solution.
- a solution obtained by dissolving the resin component in an organic solvent may be applied to the entire or at least part of the surface of the can body 1 or the resin layer 8 .
- the resin component of the base image layer 6 may include a thermosetting acrylic resin, a thermosetting epoxy resin, or a thermosetting polyurethane resin. Baking may be performed with heat, air, ultraviolet radiation or electron beam radiation.
- the printing of the base image layer 6 may be provided by performing solid printing.
- the base image layer 6 may be provided by pattern printing.
- the ink composition may be a single color such as white or transparent.
- multiple colors of ink compositions may be used.
- the base image layer 6 By additionally providing the base image layer 6 on the can body 1 or the resin layer 8, the effect that the image of the printed image layer 3 becomes clearer can be obtained. Further, by providing the base image layer 6, the decorativeness of the can container 50 and the degree of freedom in printing can be improved.
- the can container 50 of the embodiment shown in FIG. 8 can have a clearer image of the printed image layer 3 by providing the base image layer 6. Moreover, the can container 50 of the embodiment shown in FIG. 8 can also have the image of the base image layer 6 and the image of the printed image layer 3 superimposed, and can have improved decorative properties. Furthermore, since the resin layer 8 of the embodiment shown in FIG. It is possible to prevent metal powder from adhering to the mold for forming the diameter portion 100.
- FIG. 9 is an example of a flow for manufacturing the can container 50 of this embodiment by wet molding.
- the can container 50 of this embodiment can be manufactured by performing the processes S10 to S80 in FIG.
- the processes from S10 to S80 will be explained in order, but at least some of these processes may be executed in parallel, and each step may be executed in parallel without departing from the spirit of the present invention. It may also be executed by replacing the .
- wet forming is performed on a metal plate.
- a metal plate is punched into a cup shape, and the side wall is stretched to form a can body and a bottom.
- wet molding includes steps S11 to S16, as shown in FIG.
- FIG. 10 is a diagram showing S10 in the flow.
- an uncoiler step is performed in which the metal plate wound into a coil is unwound and stretched.
- the metal may be, but is not limited to, aluminum or steel.
- a lubricator step is performed to apply a lubricant to the metal material.
- the lubricant may be a lubricant.
- Known lubricants can be used.
- a cupping press step is performed in which the metal material is punched into a cup shape to form a cup-shaped material.
- Coolant may be a lubricant. Known lubricants can be used.
- the cup-shaped material is washed and dried, and a washer step is performed to remove applied coolant and the like.
- the washed and dried cup-shaped material is referred to as a can body.
- the process advances to step S40.
- paint may be applied to the inner peripheral surface of the can body and baked.
- the inner circumferential surface of the can body is less likely to be scratched.
- Any known paint may be used.
- the paint may be applied using spray painting. Burning can be performed by a known method. For example, hot air drying may be used.
- the step of coating the inner peripheral surface of the can body can be performed not only after finishing S16.
- neck processing can be performed by a known method.
- neck processing may be performed by the method described in Patent Publication No. 2748856 or Patent Publication No. 2705571.
- the necking may be performed using a die necking tool.
- the die necking tool may be one described in Japanese Patent Publication No. 2018-070181.
- FIG. 11 is a sectional view showing an example of the component configuration of a die necking tool 400 used in neck processing of this embodiment.
- the die necking tool 400 includes an insert section 410, a locating insert section 420, an adapter section 430, and a centering section 440.
- the insert part 410 has a role as a main molding surface that contacts the can body 1 from the outside of the can body 1 and molds the can body 1.
- the insert part 410 has a shape in which the width of the insert part 410 gradually narrows from the part in contact with the locating insert part 420 to the centering part 440 as it approaches the adapter part 430.
- the insert portion 410 includes at least an open end portion 410a and a bent portion 410b on its surface.
- the open end 410a forms the open end of the can body 1.
- the bent portion 410b forms a portion where the outer diameter of the can body 1 gradually decreases.
- the can body 1 contacts the open end 410a and the bent portion 410b of the insert portion 410 during neck processing.
- the locating insert part 420 has the role of centering the can body 1.
- the adapter part 430 has the role of a knockout for taking out the can body 1 in which the reduced diameter part 100 has been formed by neck processing.
- the centering part 440 has a role as a core inserted into the inside of the can body 1.
- the centering portion 440 includes at least an open end portion 440a on its surface. The open end 440a forms the open end of the can body 1. The can body 1 comes into contact with the open end 440a of the center ring portion 440 during neck processing.
- a smooth diamond film may be formed on all or at least a portion of the die necking tool 400 that contacts the can body 1.
- a smooth diamond film may be formed on the surface of at least one of the insert portion 410 and the center ring portion 440 that comes into contact with the can body 1.
- at least one of the open end 410a of the insert part 410, the bent part 410b, or the open end 440a of the center ring part 440 has a smooth diamond-formed surface.
- the diamond film may be formed on the base material of the die necking tool by a plasma CVD method or the like.
- the smoothness of the diamond film can be increased by polishing the surface using a mechanical or chemical method.
- the surface of the diamond film may be polished so that the surface roughness Ry (JIS B-0601-1994) is 0.4 ⁇ m or less, preferably 0.2 ⁇ m or less.
- the dynamic friction coefficient between the die necking tool 400 and the can body 1 may be 0.30 or less, preferably 0.15 or less.
- the above dynamic friction coefficient can be achieved by forming a smooth diamond film on all or at least a portion of the portion of the die necking tool 400 that comes into contact with the can body 1. Since the coefficient of dynamic friction between the die necking tool 400 and the can body 1 is 0.30 or less, the can body 1 can be prevented from being damaged even if the varnish layer 2 is not formed on the surface of the can body 1. , good sliding properties can be ensured between the die necking tool 400 and the can body 1, and necking can be performed.
- the above dynamic friction coefficient exceeds 0.30, the sliding property between the die necking tool 400 and the can body 1 during neck processing will deteriorate, and the load during forming will be unevenly applied to the processed part, causing the can body 200 to deteriorate. There is a risk of buckling. Furthermore, if the above-mentioned coefficient of kinetic friction exceeds 0.30, the slipperiness between the conveyance guide and the adjacent can body 1 during transportation of the can body 1 will be poor, and the production line of the can body 1 and the subsequent contents will be affected. There is a risk of clogging or flow problems occurring in the filling line. In addition to the die necking tool shown in FIG. 11, a die necking tool in which a smooth diamond film is formed on all or at least part of the part that contacts the can body 1 and satisfies the above dynamic friction coefficient may be used. Can be done.
- FIG. 12 is an example of a neck machining flow using the die necking tool 400.
- the open end of the can body is pushed between the insert part 410 and center ring part 440 of the die necking tool ((A) in FIG. 12).
- the open end of the can collides with the locating insert part 420, and then collides with the insert part 410 and is bent ((B) in FIG. 12).
- the open end of the can body collides with the center ring part 440 ((C) in FIG. 12), is bent back ((D) in FIG. 12), and finally the reduced diameter part 100 is formed in the can body. ((E) in FIG. 12).
- the can body may be subjected to flange processing to form a flange 101 for attaching a can lid ((E) in FIG. 12).
- the can body that has been neck-processed is referred to as a can container.
- step S10 to S40 may be performed at a can factory. After S40, the process advances to step S50.
- an ink composition is printed on all or at least a portion of the surface of the can container (for example, the reduced diameter portion 100, the can body portion 200, or the bottom portion 250).
- Printing may be done on the metal base of the can body.
- Printing may be performed by inkjet printing.
- Printing may be performed by plate offset printing.
- inkjet printing may be performed by the method described in Japanese Patent Publication No. 6314468.
- Inkjet printing may be a method in which an ink composition is directly discharged onto a can from an inkjet head provided in an inkjet printer.
- inkjet printing may be direct inkjet printing in which an ink composition is directly ejected onto a can from an inkjet head provided in an inkjet printer.
- inkjet printing may be offset type inkjet printing in which an ink composition is ejected onto a blanket from an inkjet head provided in an inkjet printer, and an inkjet image formed on the blanket is transferred to a can container. .
- the ink composition used for printing may be, but is not limited to, an aqueous ink, a solvent ink, an ultraviolet curable ink, or an electron beam curable ink.
- the image formed by printing may be a color image using ink compositions of multiple colors.
- the image formed by printing may be a monochrome image using an ink composition of one color.
- the ink composition may be printed while the can container is fixed to a can container holding member.
- a known member such as a star wheel can be used.
- the can container may be fixed by the method described in Japanese Patent Publication No. 6124024.
- the can container may be fixed by chucking the bottom of the can container to the can container holding member.
- the can container may be fixed to the can container holding member by vacuum suction at the bottom of the can container.
- a pressing member may be provided in addition to the can container holding member.
- the holding member By providing the holding member, the can container can be fixed more stably. Further, by providing the pressing member, it is possible to prevent the ink composition from entering the inside of the can container.
- the pressing member may be placed at a position to press the reduced diameter portion or opening of the can container.
- the pressing member may or may not cover the reduced diameter portion. If the ink composition is highly irritating or sensitizing to the skin, the ink composition is prevented from being applied to the reduced diameter portion by arranging a pressing member to cover the reduced diameter portion, It can reduce irritation and sensitization to the skin.
- the printed can container is baked to form a printed image layer.
- the printed image is fixed on the can container.
- Baking may be performed by hot air drying.
- Baking may be performed by ultraviolet irradiation.
- the baking may be performed by electron beam irradiation.
- a varnish layer may be formed by applying varnish to all or at least a portion of the can container for the purpose of protecting the printed image layer.
- the varnish layer may be formed by applying a solution prepared by dissolving a resin component in an organic solvent and baking the solution.
- the resin component of the varnish layer may include a thermosetting acrylic resin, a thermosetting epoxy resin, or a thermosetting polyester resin. Baking may be performed with heat, air, ultraviolet radiation or electron beam radiation.
- the can container on which the printed image layer has been formed is inspected.
- the inspection may be to check whether there are any dents, holes, etc. on the outer circumferential surface or inner circumferential surface of the can container.
- the test may check whether the printed image of the printed image layer is clear.
- the inspection may be to check for dirt or flaws on the outer peripheral surface of the can container.
- the can container that has been inspected is filled with contents.
- a can lid is attached to a can container filled with contents. Filling the contents and attaching the can lid may be performed by known methods.
- the can container 50 shown in the embodiment shown in FIG. 3 or 4 can be obtained.
- the steps from S10 to S40 may be performed at a can factory.
- Steps S50 to S80 may be performed by the bottler.
- the can manufacturing factory performs the steps from S10 to S40, and stores can containers on which no printed image layer is formed.
- the changed image can be printed on the can container at the bottler, so the number of can containers to be discarded can be reduced. Furthermore, the design of the printed image can be changed more flexibly and with a higher degree of freedom. In addition, since there is no need to store many types of printed cans and containers at the can manufacturing factory, storage costs are reduced and the need for high-mix, small-lot production can be met.
- the steps from S10 to S70 may be performed at a can factory, and the step S80 may be performed at a bottler.
- the pattern of division of steps in can factories and bottlers is not limited to these.
- a can container may be manufactured by combining a plurality of configurations of at least some of the modified examples shown below.
- FIG. 13 is another example of the flow for manufacturing the can container 50 of this embodiment not by wet molding but by dry molding.
- the can container 50 of this embodiment can be manufactured by performing the processes from S110 to S80 in FIG. 13. Note that for convenience of explanation, the processes from S110 to S80 will be explained in order; however, at least some of these processes may be executed in parallel, or each step may be executed in parallel without departing from the spirit of the present invention. It may also be executed by replacing the .
- dry molding is performed on the metal coil material.
- a metal coil material is coated with a resin film, punched into a cup shape, and the side wall is stretched to form a can body and a bottom.
- dry molding includes steps S11 to S15, as shown in FIG.
- FIG. 14 is a diagram showing S110 in the flow.
- an uncoiler step is performed in which the metal coil material wound into a coil is unwound and stretched.
- the metal may be, but is not limited to, aluminum or steel.
- a resin film is laminated on both or one side of the metal to form a resin layer.
- a laminator described in JP-A No. 2004-25640 may be used to laminate resin films.
- the resin contained in the resin film may include a thermoplastic resin.
- the resin film may include polyester resin.
- the resin contained in the resin film may contain a thermosetting acrylic resin, a thermosetting epoxy resin, a thermosetting polyurethane resin, or a thermosetting polyester resin instead of the thermoplastic resin.
- a thermosetting acrylic resin By coating the metal coil material with a resin film, it has appropriate slipping properties, and even without applying varnish, it improves the slipping properties of can containers during neck processing and prevents the surface from being damaged. Can be done. Furthermore, since the neck can be processed without applying varnish, the cost and number of steps for manufacturing cans can be reduced by eliminating varnish.
- step S13 After laminating the resin films to form the resin layer, you may proceed to step S13. Furthermore, before proceeding to step S13, a lubricant may be applied to the outer surface as necessary. For the steps after S13, steps similar to the wet molding steps in FIG. 9 may be applied.
- the can body that has been dry-molded is referred to as a can container.
- step S40 necking may be performed on at least the outer surface of the can container on which the resin layer has been formed to form a reduced diameter portion.
- the resin layer covers at least the reduced diameter portion and protects the can container from neck processing tools.
- the neck processing may be performed using a known die necking tool.
- the neck processing may be performed using the die necking tool on which the above diamond film is formed.
- the coefficient of dynamic friction can be adjusted to an even lower value.
- the coefficient of dynamic friction between the die necking tool and the resin layer may be 0.30 or less. Since the coefficient of dynamic friction between the die necking tool and the resin layer is 0.30 or less, necking can be performed without damaging the can container even if a varnish layer is not formed on the surface of the resin layer. be able to.
- the can body may be subjected to flange processing to form a flange for attaching a can lid.
- step S40 after necking the can container and forming a reduced diameter portion, the process may proceed to step S401.
- the can container is heated to soften the resin layer. Even if unevenness or scratches are formed on the resin layer due to neck processing, by heating the can container, the resin contained in the resin layer will be softened and the unevenness or scratches generated on the surface of the can container will be at least removed. The effect of partial repair or mitigation can be obtained.
- This heat treatment is preferably carried out at a temperature range of generally Tg+50°C or higher, particularly Tg+100°C to melting point (Tm) -5°C, based on the glass transition point (Tg) of the resin coating layer. A short time is sufficient for the necessary heat treatment time, and specifically, it is preferable to perform the heat treatment for 1 minute to 10 minutes. After heating, the process may proceed to step S50. Note that the step S401 may be skipped and the process may proceed to S50 after S40 without heating the can container.
- the can container 50 shown in the embodiment shown in FIG. 5 can be obtained.
- a varnish layer may be formed by applying varnish to all or at least a portion of the can container for the purpose of protecting the printed image layer. In this case, the can container 50 shown in the embodiment of FIG. 6 can be obtained.
- the receptive layer is formed on all or at least part of the outer peripheral surface of the can container after performing S40 or S401 before proceeding to step S50.
- the steps to form are shown.
- the receptive layer may be formed on all or at least a portion of the can.
- a receptive layer may be formed by drying the can coated with the resin component, drying it with hot air, irradiating it with ultraviolet rays, irradiating it with an electron beam, or the like.
- the resin component of the receptor layer may include a thermosetting acrylic resin, a thermosetting epoxy resin, a thermosetting polyurethane resin, or a thermosetting polyester resin.
- the thickness of the receptor layer may be 0.1 ⁇ m or more and 50 ⁇ m or less.
- a receptor layer on the can container By providing a receptor layer on the can container, it is possible to have an image with better image quality.
- the receptive layer on the can container it is possible to improve the adhesion between the ink and the receptive layer, and it is possible to have an image of the printed image layer with better image quality.
- a solution in which a resin component is dissolved in an organic solvent may be applied to all or at least a portion of the outer peripheral surface of the can container.
- the resin component of the base image layer may include a thermosetting acrylic resin, a thermosetting epoxy resin, or a thermosetting polyurethane resin.
- the base image layer may be formed on at least the portion of the can that is later reduced in diameter.
- the applied resin component is baked to form a base. Burning can be performed by a known method.
- the printing may be solid printing.
- the printing may be pattern printing.
- the pattern may be a striped pattern.
- the pattern may be a gradation pattern.
- the color of the print may be colorless and transparent.
- the color of the print may be white.
- the printing color may be a single color other than white, or may be a plurality of colors.
- the printed ink composition is baked to form a base image layer.
- Burning can be performed by a known method.
- the can container 50 shown in the embodiment of FIG. 8 can be obtained.
- the process proceeds to step S50.
- the printed portion of the can container can have a clearer image. Further, by providing the base image layer on the can container, the image of the base image layer and the image of the printed image layer can be superimposed, so that it is possible to have improved decorative properties.
- Example 1 [Manufacture of can body] Dry molding was performed on an aluminum coil material (plate thickness 0.24 mm) according to steps S110 (S11 to S15) in FIG. 13 to produce a can body.
- the can body was a seamless can.
- the height of the can body was 120 mm. No resin layer was formed.
- the die necking tool used was one in which a smooth diamond film was formed on the surfaces of both the insert part and the center ring part that were in contact with the can body.
- the surface of the diamond film was polished so that the surface roughness Ry (JIS B-0601-1994) was 0.1 ⁇ m.
- the thickness of the diamond film was 12.5 ⁇ m.
- Example 2 A can container was manufactured in the same manner as in Example 1, except that the surface of the diamond film was polished so that the surface roughness Ry was 0.2 ⁇ m.
- Example 3 A can container was manufactured in the same manner as in Example 1, except that the surface of the diamond film was polished so that the surface roughness Ry was 0.4 ⁇ m.
- Example 4 Manufacture of can body and formation of resin layer] Specifically, an aluminum coil material (plate thickness 0.24 mm) was dry-molded according to steps S11 to S15 in FIG. 14 to produce a can body.
- the can body was a seamless can.
- the height of the can body was 120 mm.
- the rewound coil material was covered with a resin film to form a resin layer.
- a polyester resin (Ester manufactured by Toyobo Co., Ltd.) was used as the resin film.
- the thickness of the resin layer was 10 ⁇ m.
- Example 5 A can container was manufactured in the same manner as in Example 4, except that after the neck processing, a step of heating the can container at 200° C. for 2 minutes was additionally performed.
- Example 6 A resin layer is formed on the can body in the same manner as in Example 4, a printed image layer is formed on the resin layer, and a smooth diamond is applied to the surfaces of both the insert part and the center ring part that come into contact with the can body.
- a can container was manufactured in the same manner as in Example 1, except that the surface of the diamond film was polished so that the surface roughness Ry was 0.6 ⁇ m.
- a can container was manufactured in the same manner as in Example 1, except that the surface of the diamond film was polished so that the surface roughness Ry was 0.8 ⁇ m.
- Example 3 A die-necking tool without a diamond film is used, and the coefficient of dynamic friction between the can body and the die-necking tool is determined by using a carbide pin without a diamond film (the pin material is ultra-hard) instead of a diamond pin.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
Abstract
Description
前記缶胴部の他端側で外径が縮径された縮径部を含んでよい。前記缶容器において、少なくとも前記縮径部の外表面には、ニス層が形成されていなくてよい。
図13は、本実施形態の缶容器50を、ウエット形成による製造ではなく、ドライ成形により製造するフローの他の一例である。本実施形態の缶容器50は、図13のS110~S80の処理を行うことによって製造することができる。なお、説明の便宜上、S110~S80の処理を順番に説明するが、これらの処理は少なくとも一部が並列に実行されるものであってもよいし、本発明の趣旨を逸脱しない範囲で各ステップを入れ替えて実行されるものであってもよい。
本実施形態では受容層を形成しない場合を説明したが、図15は、S50のステップに進む前に、S40またはS401を行った後、缶容器の外周面の全部または少なくとも一部に受容層を形成するステップを示す。受容層は、缶容器上の全部または少なくとも一部に形成してよい。
本実施形態では下地画像層を形成しない場合を説明したが、図16は、S50のステップに進む前に、S40またはS401を行った後、缶容器の外周面の全部または少なくとも一部に下地画像層を形成するステップを示す。
[缶体の製造]
アルミニウムのコイル材(板厚0.24mm)に対して図13のS110(S11からS15)のステップによりドライ成形を行い、缶体を製造した。缶体は、シームレス缶であった。缶体の高さは120mmであった。樹脂層は形成しなかった。
[ネック加工]
ドライ成形を終えた缶体に対して、ダイネッキング工具を用いてネック加工を行った。ダイネッキング工具は、インサート部、およびセンターリング部の両方の、缶体と接触する表面に平滑なダイヤモンド膜が形成されているものを使用した。ダイヤモンド膜の表面粗さRy(JIS B-0601-1994)が、0.1μmとなるように表面研磨を行った。ダイヤモンド膜の厚さは12.5μmであった。
[動摩擦係数の測定]
缶体とダイネッキング工具との間の動摩擦係数は、缶と工具を用いての直接測定は難しいため、ピンオンディスクを用いた回転摩擦試験により代替して測定した。ピンは、ダイネッキング工具素材である、超硬合金のピンにダイヤモンド膜を形成したもの(ダイヤピン)を用いた。ディスクとしては、アルミニウム材(A3104)を用いた。
<摺動特性>
以下の条件でピンオンディスク試験を行って摩擦力を求めた。摩擦係数(摩擦力/荷重)は、摩擦力が安定した領域において算出した。
<ピンオンディスク試験条件>
ピン材質:ダイヤモンド膜を形成した超硬合金。
ピン名:ダイヤピン。
ピン表面粗さ:ダイヤピンRy=0.1μm
ディスク材:アルミニウム材(A3104)。
荷重:59N(6kgf)
回転数:10rpm
送り速度:20mm/min
摺動距離:2m
試験温度:30℃
潤滑剤:無し。
[印刷画像層の形成]
缶体の表面に、インクジェット印刷を用いて印刷画像層を形成した。インクジェット印刷は、京セラ社製ヘッドを用いて行った。インク組成物は、溶剤系インク(トマテック社製)を用いて行った。インクジェット印刷により印刷されたインク組成物の焼き付けは、熱風乾燥により行った。
[ネック成形性の評価基準]
缶容器の外観を目視により判断した。結果を表1に示す。
〇:缶容器にネックしわ、傷、座屈の発生は認められなかった。
×:缶容器にネックしわ、傷、座屈のいずれか1つ以上が認められた。
[印刷画像の画質の評価基準]
印刷画像層の印刷画像の画質を目視により判断した。結果を表1に示す。
◎:印刷画像は輪郭部分も含めて、非常に鮮明であった。
〇:印刷画像は鮮明であった。
×:印刷画像は不鮮明であった。
ダイヤモンド膜の表面粗さRyが、0.2μmとなるように表面研磨を行ったこと以外は、実施例1と同様にして缶容器を製造した。
ダイヤモンド膜の表面粗さRyが、0.4μmとなるように表面研磨を行ったこと以外は、実施例1と同様にして缶容器を製造した。
[缶体の製造および樹脂層の形成]
アルミニウムのコイル材(板厚0.24mm)に対して具体的には図14のS11からS15のステップによりドライ成形を行い、缶体を製造した。缶体は、シームレス缶であった。缶体の高さは120mmであった。巻き戻したコイル材に対して樹脂フィルムを被覆し、樹脂層を形成した。樹脂フィルムは、ポリエステル樹脂(東洋紡社製エステル)を用いた。樹脂層の厚さは、10μmであった。樹脂層とダイネッキング工具との間の動摩擦係数は、ダイヤピンの代わりに、ダイヤモンド膜を形成していない超硬ピン(ピン材質は超硬合金、Ry=0.28μm)を用い、ディスク材としてアルミニウム材の代わりに、樹脂被覆アルミニウム材を用いた以外は、実施例1と同様に測定した。
上記の手順で缶体に樹脂層を形成したが、インサート部、およびセンターリング部のいずれにも、缶体と接触する表面にダイヤモンド膜が形成されていないダイネッキング工具を用いてネック加工を行い、樹脂層の上に印刷画像層を形成したこと以外は、実施例1と同様にして缶容器を製造した。
ネック加工を行った後、缶容器を200℃で2分加熱するステップを追加的に行ったこと以外は、実施例4と同様にして缶容器を製造した。
実施例4と同様の手順で缶体に樹脂層を形成し、樹脂層の上に印刷画像層を形成し、インサート部、およびセンターリング部の両方の、缶体と接触する表面に平滑なダイヤモンド膜(表面粗さ=0.2μm)が形成されているダイネッキング工具を使用して缶容器を製造した。樹脂層とダイネッキング工具との間の動摩擦係数の測定は、ディスク材としてアルミニウム材の代わりに、樹脂被覆アルミニウム材を用いたこと以外は、実施例2と同様にして、測定した。
ダイヤモンド膜の表面粗さRyが、0.6μmとなるように表面研磨を行ったこと以外は、実施例1と同様にして缶容器を製造した。
ダイヤモンド膜の表面粗さRyが、0.8μmとなるように表面研磨を行ったこと以外は、実施例1と同様にして缶容器を製造した。
ダイネッキング工具として、ダイヤモンド膜が形成されていないものを用い、缶体とダイネッキング工具との間の動摩擦係数は、ダイヤピンの代わりに、ダイヤモンド膜を形成していない超硬ピン(ピン材質は超硬合金、Ry=0.28μm)を用いたこと以外は、実施例1と同様にして缶容器を製造した。
2 ニス層
3 印刷画像層
6 下地画像層
7 受容層
8 樹脂層
50 缶容器
100 縮径部
101 フランジ
200 缶胴部
250 底部
300 印刷部
400 ダイネッキング工具
410 インサート部
410a 開口端部
410b 屈曲部
420 ロケーティングインサート部
430 アダプター部
440 センターリング部
440a 開口端部
Claims (13)
- 表面にニス層が形成されていない缶体の一端にダイネッキング工具で縮径部を形成する段階を含み、
前記ダイネッキング工具と前記缶体との間の動摩擦係数が0.30以下である、
缶容器の製造方法。 - 前記縮径部を形成する段階の前に、
前記缶体のうち少なくとも前記縮径部が形成される一端部の外表面に、熱可塑性樹脂を含む樹脂層を形成する段階を含む、
請求項1に記載の缶容器の製造方法。 - 前記熱可塑性樹脂は、ポリエステル樹脂である、
請求項2に記載の缶容器の製造方法。 - 前記縮径部が形成された前記缶体を加熱し、前記樹脂層を軟化させる段階をさらに含む、
請求項3に記載の缶容器の製造方法。 - 前記ダイネッキング工具の前記缶体と接触する部分の少なくとも一部に平滑なダイヤモンド膜が形成されている、
請求項1に記載の缶容器の製造方法。 - 前記ダイネッキング工具は、
前記缶体の内部に挿入されるセンターリング部、及び、
外側から前記缶体に接触して前記缶体を成形するインサート部を有し、
前記インサート部及び前記センターリング部の少なくとも一方の前記缶体と接触する表面は、前記平滑なダイヤモンド膜を有する、
請求項5に記載の缶容器の製造方法。 - 金属板を絞り加工することで底部とともに缶胴部を形成する段階を含む、
請求項1から6のいずれか1項に記載の缶容器の製造方法。 - 前記縮径部が形成された前記缶体の表面上にインク組成物を印刷して印刷画像層を形成する段階を含む、
請求項1から6のいずれか1項に記載の缶容器の製造方法。 - 缶胴部、
前記缶胴部の一端側に設けられた底部、及び、
前記缶胴部の他端側で外径が縮径された縮径部を含み、
少なくとも前記縮径部の外表面には、ニス層が形成されていない、
缶容器。 - 前記縮径部の外表面において、金属地上に熱可塑性樹脂を含む樹脂層が形成されている、
請求項9に記載の缶容器。 - 前記熱可塑性樹脂は、ポリエステル樹脂である、
請求項10に記載の缶容器。 - 前記樹脂層上に、印刷画像層が形成されている、
請求項10又は11に記載の缶容器。 - 金属地上に印刷画像層が直接形成されている、
請求項9に記載の缶容器。
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Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2705571B2 (ja) | 1994-05-02 | 1998-01-28 | 東洋製罐株式会社 | ネックイン部付きシームレス缶 |
JP2748856B2 (ja) | 1994-03-31 | 1998-05-13 | 東洋製罐株式会社 | スチール製絞りしごき缶 |
JP2000233247A (ja) * | 1999-02-12 | 2000-08-29 | Nippon Steel Corp | イージオープン蓋の製造方法及び蓋 |
JP2004025640A (ja) | 2002-06-26 | 2004-01-29 | Toyo Kohan Co Ltd | 有機樹脂被覆金属板の製造方法および有機樹脂被覆金属板の製造装置 |
JP2004224417A (ja) * | 2003-01-27 | 2004-08-12 | Daiwa Can Co Ltd | 金属缶の開口カール部およびその製造方法 |
JP6124024B2 (ja) | 2012-06-21 | 2017-05-10 | 東洋製罐株式会社 | 缶体のピンホール検査装置 |
JP6314468B2 (ja) | 2013-12-17 | 2018-04-25 | 東洋製罐株式会社 | 印刷缶及びその製造方法 |
JP2018070181A (ja) | 2016-10-25 | 2018-05-10 | 東洋製罐株式会社 | アルミニウム缶 |
JP2019108138A (ja) | 2017-12-15 | 2019-07-04 | 昭和アルミニウム缶株式会社 | 飲料用缶、飲料缶、および、飲料用缶の製造方法 |
JP2019181549A (ja) * | 2018-04-17 | 2019-10-24 | ユニバーサル製缶株式会社 | 缶体の製造方法 |
JP2021154355A (ja) * | 2020-03-27 | 2021-10-07 | 東洋製罐グループホールディングス株式会社 | 有底筒状体の製造方法 |
JP2021178679A (ja) * | 2020-05-07 | 2021-11-18 | 東洋製罐株式会社 | 缶容器 |
-
2022
- 2022-07-01 JP JP2022107290A patent/JP2024006435A/ja active Pending
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2023
- 2023-06-20 TW TW112123071A patent/TW202404866A/zh unknown
- 2023-06-21 CN CN202380031859.6A patent/CN118973731A/zh active Pending
- 2023-06-21 WO PCT/JP2023/022879 patent/WO2024004775A1/ja active Application Filing
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2748856B2 (ja) | 1994-03-31 | 1998-05-13 | 東洋製罐株式会社 | スチール製絞りしごき缶 |
JP2705571B2 (ja) | 1994-05-02 | 1998-01-28 | 東洋製罐株式会社 | ネックイン部付きシームレス缶 |
JP2000233247A (ja) * | 1999-02-12 | 2000-08-29 | Nippon Steel Corp | イージオープン蓋の製造方法及び蓋 |
JP2004025640A (ja) | 2002-06-26 | 2004-01-29 | Toyo Kohan Co Ltd | 有機樹脂被覆金属板の製造方法および有機樹脂被覆金属板の製造装置 |
JP2004224417A (ja) * | 2003-01-27 | 2004-08-12 | Daiwa Can Co Ltd | 金属缶の開口カール部およびその製造方法 |
JP6124024B2 (ja) | 2012-06-21 | 2017-05-10 | 東洋製罐株式会社 | 缶体のピンホール検査装置 |
JP6314468B2 (ja) | 2013-12-17 | 2018-04-25 | 東洋製罐株式会社 | 印刷缶及びその製造方法 |
JP2018070181A (ja) | 2016-10-25 | 2018-05-10 | 東洋製罐株式会社 | アルミニウム缶 |
JP2019108138A (ja) | 2017-12-15 | 2019-07-04 | 昭和アルミニウム缶株式会社 | 飲料用缶、飲料缶、および、飲料用缶の製造方法 |
JP2019181549A (ja) * | 2018-04-17 | 2019-10-24 | ユニバーサル製缶株式会社 | 缶体の製造方法 |
JP2021154355A (ja) * | 2020-03-27 | 2021-10-07 | 東洋製罐グループホールディングス株式会社 | 有底筒状体の製造方法 |
JP2021178679A (ja) * | 2020-05-07 | 2021-11-18 | 東洋製罐株式会社 | 缶容器 |
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