JP4512182B2 - Can with metal foil laminate film - Google Patents

Description

  The present invention relates to a can body with a metal foil laminated film in which a metal foil is laminated on a can body, and in particular, gives a can body a bright and heavy glittering feeling, metallic feeling, or metallic luster, which is unique and discriminating. The present invention relates to a can with a metal foil laminate film having a certain decorative property.

On the outer surface of the can body, the contents and its image are displayed by design, and the can body surface has been conventionally decorated to differentiate products. Conventionally, such decoration has been reported as a method of directly printing on the surface of a can body or a method of laminating a gravure printed film on a can body.
For example, a printing ink layer that uses ink containing a pigment such as aluminum metal or mica directly on the surface of the can in order to give the can a glitter, metallic feel, or metallic luster for the purpose of an excellent eye catching effect. There are reports of a method of directly applying to the surface of the can body by an offset method, a method of laminating a gravure-printed film on the can body, and the like.
As a method for printing directly on the surface of the can body, there is a method in which a printing ink layer using an ink containing a pigment is directly applied to the surface of the can body by an offset method. However, with this method, it was not possible to obtain sufficient glitter and metallic feeling.

  In the case of a method of laminating a gravure-printed film on a can body, it is necessary to use a glittering base metal such as tinplate or aluminum, so that a can body made of TFS (Tin Free Steel) with low radiance is used. Could not be applied.

  Furthermore, for example, in Patent Document 1, a label base material, a printing layer sequentially laminated on one side of the label base material, an anchor coat layer formed from a thermosetting resin composition, a vapor deposition layer, and a thermosetting type A metal can label comprising an adhesive layer formed of the resin composition is described. Further, in Patent Document 2, a resin film mainly composed of a thermoplastic film and provided with at least a vapor deposition layer and a printing ink layer is disposed on the metal surface of the metal body of the can body. The film sticking can body which has the metallic luster formed by sticking to the outer surface side of a can body is described so that it may become near.

Japanese Patent Laid-Open No. 11-272172 JP 2000-95248 A

However, although any method can obtain a can body having high glitter, it is necessary to repeat complicated steps such as thermal curing and UV curing. An object of the present invention is to provide a can that can provide a synergistic decoration effect by the color and pattern of the printed layer and the glitter effect of the metal foil. It is.
In addition, the color and pattern of the printed layer and the reflected light of the metal foil are overlaid and decorated, giving a strong impression to the viewer, and a thicker and deeper decoration effect overall, The aim is to provide a can that has a strong impact on consumers in terms of differentiation from other products and can enhance the advertising effect.

The can with metal foil laminate film of the present invention,
On one side of the transparent resin film,
Providing a printing layer,
A metal foil having a thickness of 3 to 10 μm is laminated through a transparent adhesive layer that transmits light so as to cover the entire printed layer,
Covering the metal foil in contact with the outer surface of the can body made of tin-free steel through an adhesive layer,
Characterized in that by forming a top coat layer on another surface of the transparent resin film after coating on the can body.
Moreover, in the can with a metal foil laminate film according to claim 2, the top coat layer formed on the other surface of the transparent resin film according to claim 1 has a printed layer on the other surface of the transparent resin film. It is provided and is formed so as to cover the entire printed layer.

According to the above configuration, by coating the outer peripheral surface of the can body with the metal foil laminate film in which the metal foil and the printing layer are formed in advance, the metallic gloss with a depth in which the metallic luster and the printed pattern are superimposed. The can which provided the decorating effect of can be provided.
According to the can body with a metal foil laminate film of the present invention, the metallic foil is formed on the surface of the transparent resin film coated on the can body, so that the metallic color tone due to the reflected light of the metal foil is formed on the printed pattern. Exhibiting the effect of layered glitter, can give a strong impression to the viewer, and overall, a thicker and deeper decoration effect is obtained, to consumers in terms of differentiation from other products It can give a strong impact and increase the advertising effect.
In addition, even if the can body surface itself has almost no metallic luster, the portion on which the characters and patterns are not printed has a metallic luster that is glittering with the metal foil, and also about the characters and patterns imparted by the printing layer, By being influenced by the metallic luster due to the metal foil below the printed layer, it is possible to provide a design having a new glossy metallic glossy color by combining the color of the printed layer and the reflected light of the metallic foil.

  Hereinafter, an embodiment of a can with a metal foil laminate film of the present invention will be described in detail based on the drawings.

[Embodiment 1]
Hereinafter, Embodiment 1 of the can with a metal foil laminate film of the present invention will be described. FIG. 1A is a cross-sectional view of a can body, and FIG. 1B is an enlarged cross-sectional view showing a part thereof.
In FIG. 1, a can body 1 is bonded to a surface of a cylindrical can body 2 with a transparent or semi-transparent (transparent in the present invention) resin film 11 for covering a can body in which a metal foil 12 is previously laminated. It is a can with a metal foil laminate film coated with an agent. The decorative film 10 coated on the outer peripheral surface of the can body 2 is provided with a printing layer 13 on the back surface side (side in contact with the can body 2) with respect to the transparent resin film 11 serving as a base material. Further, a metal foil 12 and an adhesive layer 15 are sequentially formed through a transparent adhesive layer 14 so as to cover the entire printed layer 13. On the other hand, a top coat layer 16 is provided on the surface side (the outer peripheral surface of the can opposite to the can body side).

In the can 1 with the metal foil laminate film of the first embodiment as described above, the light transmitted through the transparent resin film 11 is a portion 13a where the printing layer 13 is not formed (and the printing layer transmits light). When entering through the printing layer 13), passing through the transparent adhesive layer 14, reflecting off the metal foil 12, and again through the transparent resin film 11, the metallic reflected light of the metal foil 12 and the printing of the printing layer 13 are printed. Creates an effect that looks like overlapping patterns.
That is, it is possible to give a strong impression to a person who sees the pattern or characters displayed on the printed layer 13 against the background of the metallic glitter reflected by the metal foil 12.

The material which comprises the can 1 with a metal foil laminate film of Embodiment 1 as described above will be described in detail below.
For the metal plate forming the can body of the can body 1, cold rolled steel plate, hot dip zinc and zinc alloy plated steel plate, electro zinc and zinc alloy plated steel plate, tinplate, ultrathin tin plated steel plate, tin free steel, chrome plated steel plate, Aluminum-plated steel plate, nickel-plated steel plate, other various alloy-plated steel plates, aluminum alloy plates, other metal plates, and chemical conversion treatment such as phosphate treatment, chromate treatment, and other surface treatments as necessary Can be used.

As the transparent resin film 11 serving as a base material of the decorative film 10 covering the can body, a polyester film, a nylon film, a polypropylene film, etc. having a thickness of 10 to 30 μm are relatively highly transparent and excellent in heat resistance. A thermoplastic resin film is mentioned.
For example, as a polyester film, what has ethylene terephthalate, ethylene butyrate, and ethylene isophthalate as the main structural component is used preferably.

In the case where a polyester film is used as the thermoplastic resin film, other components can be copolymerized.
For example, dicarboxylic acid components to be copolymerized include naphthalenedicarboxylic acid, diphenyldicarboxylic acid, diphenylsulfonedicarboxylic acid, diphenoxyethanedicarboxylic acid, 5-sodium sulfoisophthalic acid, phthalic acid and other aromatic dicarboxylic acids, oxalic acid, and succinic acid. Examples thereof include aliphatic dicarboxylic acids such as acid, adipic acid, sebacic acid, dimer acid, maleic acid and fumaric acid, alicyclic dicarboxylic acids such as cyclohexanedicarboxylic acid, and oxycarboxylic acids such as p-oxybenzoic acid.

  Examples of the glycol component to be copolymerized include aliphatic glycols such as propanediol, butanediol, pentanediol, and neopentyl glycol, alicyclic glycols such as cyclohexanedimethanol, polyoxyethylene glycols such as diethylene glycol and polyethylene glycol, and the like. Can be mentioned. About said dicarboxylic acid component and glycol component, 2 or more types can also be used together.

When a nylon film is used as the thermoplastic resin film, a condensation polymer of diamine and dicarboxylic acid such as nylon 66, nylon 610, or nylon 612, or a lactam such as nylon 6, nylon 11, or nylon 12 is opened. A ring polymer can also be used.
Production of such a transparent resin film 11 can be performed by a conventional method. The transparent resin film 11 is formed into a film by a T-die method or an inflation film forming method, and subjected to stretching treatment such as uniaxial stretching or biaxial stretching as desired. Can be manufactured.
In addition, it is also possible to perform a known adhesion improving surface treatment such as plasma treatment or flame treatment on the resin film, or an adhesion improving coating treatment such as urethane resin or modified polyester resin.

[Print layer]
On one side of the resin film, using a printing roller, using a printing means such as gravure, printing is repeated in a single color or a plurality of colors (for example, 2 to 10 colors) with a printing ink in the case of a plurality of colors. By doing so, the printing layer 13 is formed.
The printing layer 13 preferably uses an ink made of a thermosetting urethane-based resin or the like, and various printing methods such as gravure printing, flexographic printing, and offset printing can be appropriately selected as the printing method. In the case where it is desired to use abundant colors and print beautiful colors and patterns, it is preferable to form a printing layer by gravure printing.

[Transparent adhesive layer]
A urethane-based adhesive is preferably used from the viewpoint of laminating properties and adhesiveness, and it is preferable to use an isocyanate compound as a curing agent.

[Metal foil]
As the metal foil, in addition to aluminum foil, a simple material such as malleable copper, silver, zinc, nickel, or an alloy or the like made into a thin film can be used.
The thickness of the metal foil 12 is preferably 3 to 10 μm, and is laminated on the resin film via a transparent adhesive layer. A metal foil having a thickness of less than 3 μm is difficult to handle, whereas if it exceeds 10 μm, the cost increases, which is not preferable.
Regardless of the metal material of the can body, by changing the type of metal foil, silver color is used by using aluminum foil, bronze color by using copper foil, gold color by using brass foil, chrome nickel foil It is possible to decorate metallic luster with different color tones such as dark silver color.
By laminating such a metal foil, the metallic foil 12 has a bright and vivid metallic feeling due to the reflection from the metal foil 12, and is affected by the reflected metallic luster of the metallic foil 12 below the printed layer. Thus, since the color of the printing layer and the metal gloss of the metal foil 12 are combined, a metallic gloss color is obtained, and thus a decorative effect can be obtained by a design using a high gloss metal gloss color.

[Adhesive layer]
As the adhesive layer 15 for covering the metal foil 12 from the back side and adhering the decorative film 10 to the can body 2, the adhesive layer 15 is easily adhered by heating and pressurization, and is adhered to the metal foil 12. Examples include thermosetting adhesives having good properties, and polyester-based, urethane-based, epoxy-based, and isocyanate-based thermosetting adhesives. An electron curable EB curable resin may be used in combination as another curable resin component.

  The polyester resin used for the adhesive is a thermoplastic resin which is a known polybasic acid and polyhydric alcohol condensate, and has a number average molecular weight of 7,000 to 40,000, preferably 10,000 to 30,000. The thing of the range of is mentioned. The polyester resin can be produced by subjecting the following acid component and alcohol component to condensation polymerization at a temperature of 200 ° C. to 250 ° C. in a reaction vessel.

  Polybasic acids used in the production of polyester resins include aliphatic dibasic acids such as adipic acid, suberic acid, azelaic acid, sebacic acid, decane-1,10-dicarboxylic acid, hexahydrophthalic acid, hexahydrotri Alicyclic polybasic acids such as merit acid and tetrahydrophthalic acid and their anhydrides, aromatic polybasic acids such as phthalic acid, isophthalic acid, terephthalic acid, trimellitic acid and pyromellitic acid, and their anhydrides, etc. Maleic acid, fumaric acid, itaconic acid and the like.

  Polyhydric alcohols used in the production of polyester resins include ethylene glycol, propylene glycol, diethylene glycol, 1 · 2-butylene glycol, 1 · 6-hexanediol, 1 · 4-cyclohexanedimethanol, neopentyl glycol, poly And lactone diol.

Examples of thermosetting components used in adhesives include amino resins such as melamine resins, guanamine resins, urea resins, phenol resins, etc.
Examples of the isocyanate curing agent include aromatic isocyanates such as tolylene diisocyanate and 4,4′diphenylmethane diisocyanate, and aliphatic isocyanates such as hexamethylene diisocyanate, isophorone diisocyanate, and xylene diisocyanate.

Examples of the EB curable resin used for the adhesive include polyester oligomers having a number average molecular weight of 300 to 5,000, preferably 1,000 to 2,000. Examples of the polyester oligomer include those obtained by ester-linking (meth) acrylic acid to a hydroxyl group-containing low molecular weight polyester having a number average molecular weight of 5,000 or less.
In general, the adhesive layer 15 preferably has a thickness of 3 to 6 μm, and may be provided on the can body surface in advance or on the film in advance.

[Production method]
Next, a method for laminating the printing layer 13 and the metal foil 12 on one side of the transparent resin film will be described.
First, using a long transparent resin film 11 separately prepared as a product in a coiled state as a base material, the printing layer 13 is applied to one side of the film while the long transparent resin film 11 is rewound and traveled. Form.
Next, the transparent adhesive layer 14 is applied to the surface of the printing layer 13, and the metal foil 12 is laminated thereon, so that the printing layer 13 and the metal foil 12 before being coated on the outer peripheral surface of the can body 2 are formed. A long decorative film for can body coating is manufactured.

  The long decorative film with the printed layer formed and laminated with the metal foil manufactured as described above has a decorative layer in which the printed layer 13, the transparent adhesive layer 14 and the metal foil 12 are laminated, in the width direction of the long film. It may be formed in a single line over, and is formed by forming two or more decorative layers having narrow non-decorative portions on both sides in the longitudinal direction of the decorative layer portion, that is, the can body The width of the decorative layer of the same dimension as the height of the film is the width direction of the long film, the decorative layer forming portion is separated from the non-decorative layer portion, and a plurality of strips (decorative layers for multiple can bodies) and It may be given so as to be.

  Next, the long decorative film obtained as described above is cut into a can size and coated on the surface of the can body. As a method of cutting a long decorative film with a printed layer formed and laminated with a metal foil and coating the outer peripheral surface of the can body, it is applied to a bottomed cylindrical can body that is not continuously heated. On the other hand, the decorative film is cut into a film sheet of a size for each can so that its width is slightly longer than the circumference of the can body, and continuously wound around each heated can body, A film sheet is coated on the outer surface of the can body by laminating the film sheet on the outer surface of the cylindrical can body so that the both ends overlap each other and pressing with a roll.

As a condition for covering the can body with a decorative film at that time,
The speed is 10-300m / min,
Can body temperature is 140 to 200 ° C,
The pressure by the pressure roll is 250 to 750 N / cm as linear pressure,
As a preferable condition, it is effective to set the speed to 150 m / min or more in order to increase productivity.
The can body temperature at the time of bonding is preferably 150 to 190 ° C. from the viewpoint of protecting the printing layer 13, although depending on the heat-sealing temperature and melt viscosity of the adhesive.
As for the pressure, a higher one is more effective for the adhesiveness, but considering the dimensional stability, about 500 N / cm is preferable.

[Formation of top coat layer]
Next, after the decorative film is coated on the can body as described above, a transparent thermosetting resin containing a lubricant is applied in order to bring lubricity to the film surface.
As the transparent thermosetting resin, polyester resin, acrylic resin, epoxy resin, etc. are basically used, and amino resin such as melamine resin, phenol resin, etc. are added to this as a curing agent, and further, lubricant such as paraffin, polyethylene, silicon, etc. In which 0.1 to 3% by weight is blended.
The thickness of the top coat layer is preferably 3 to 8 μm.

  Next, the can on which the top coat layer 16 is formed is heat set. Heat setting is a treatment performed to cure the adhesive and completely adhere to the can body, and to remove the solvent contained in the top coat layer, and to dry and cure the top coat layer. Heat at 200-230 ° C. for approximately 1-2 minutes.

  After the heat setting, the can body is trimmed at the upper part of the can body by trimming the ears generated by the forming process such as drawing formed on the upper part of the can body, and then necked in the upper part of the can body by a neck-in processing machine and flanging device. And flange processing, the can with metal foil laminate film is completed.

  As described above, the can body with a metal foil laminate film of the present invention is a cylindrical can body and can having no side seam by drawing and ironing using a metal disc such as an aluminum alloy plate or a surface-treated steel plate as a material. A two-piece can formed integrally with the bottom, and a cylindrical can body and a bottom with no side seams by impact processing or drawing redrawing (including those that are stretched during redrawing) It can be applied not only to a resin-coated two-piece can formed integrally with a can but also to a can body formed by a three-piece can such as a so-called welded can.

[Embodiment 2]
Embodiment 2 of the can with a metal foil laminate film of the present invention will be described.
The can body of Embodiment 2 has a decorative film substantially similar to the can body of Embodiment 1, but differs from Embodiment 1 in that a printed layer is further provided on the decorative film surface side.
That is, in the can body of the second embodiment, as shown in FIG. 2, the decorative film 20 covered on the outer peripheral surface of the can body 2 is on the back side with respect to the transparent resin film 21 serving as a base material. A printing layer 23 and a transparent adhesive layer 24 are provided (on the side in contact with the can body 2), and a metal foil 22 and an adhesive layer 25 are sequentially provided so as to cover the entire surface of the transparent adhesive layer 24.
On the other hand, on the surface side (can body outer peripheral surface side opposite to the can body side), characters, patterns and the like are printed on the transparent resin film 21, and a printed layer 27 and a top coat layer 26 are formed. It becomes the composition.
The printing layer 27 is formed on the outer surface of the can body of the transparent resin film 21 covered with the can body by printing with a single color or a plurality of colors using, for example, an offset printing method. . The printing layer 27 preferably uses a printing ink made of a thermosetting polyester / amino resin or the like, and various printing methods such as flexographic printing, offset printing, and screen printing can be selected as appropriate. However, if you want to print rich characters and beautiful colors and patterns using a large number of colors, print by dry offset printing using a resin relief plate or lithographic offset printing using a dampening-free lithographic printing plate. Preferably it is done.
After the printing layer 27 is formed, the top coat layer 26 is formed on the outer peripheral surface side of the can body in the same manner as in the first embodiment.

  In the can 1 with the metal foil laminate film of Embodiment 2 as described above, the topcoat layer 26, the portion 27a where the printing layer is not formed (and the printing layer 27 when the printing layer transmits light), a transparent resin The film 21, the portion 23a where the printing layer is not formed (and the printing layer 23 when the printing layer transmits light), and the light sequentially transmitted through the transparent adhesive layer 24 are reflected by the metal foil 22 and reflected in a metallic color. It becomes light and has an effect of displaying the printed pattern (printing layer 23 and printing layer 27) formed on the two layers on the surface of the can body in a three-dimensional manner.

The can body with a metal foil laminate film of the present invention is formed by forming a metal foil on the surface of a transparent resin film coated on the can body, so that a metallic color tone due to reflected light of the metal foil is superimposed on the printed pattern. In addition to being able to give a strong impression to the viewer, it has a thicker and deeper decoration effect overall, and has a strong impact on consumers in terms of differentiation from other products. And increase the advertising effect.
In addition, even if the can body surface itself has almost no metallic luster, the portion on which the characters and patterns are not printed has a metallic luster that is glittering with the metal foil, and also about the characters and patterns imparted by the printing layer, By being influenced by the metallic luster due to the metal foil below the printed layer, it is possible to provide a design having a new glossy metallic glossy color by combining the color of the printed layer and the reflected light of the metallic foil.

(A) shows sectional drawing of the can body which shows one embodiment of this invention, (b) is an expanded sectional view which expands and shows the one part. It is an expanded sectional view of the can body showing other embodiments of the present invention.

Explanation of symbols

1: Can body 2: Can body 10: Decorating film 11: Transparent resin film 12: Metal foil 13: Print layer 13a: Part where print layer is not formed 14: Transparent adhesive layer 15: Adhesive layer 16: Top coat layer 20: Decorative film 21: Transparent resin film 22: Metal foil 23: Print layer 23a: Portion where print layer is not formed 24: Transparent adhesive layer 25: Adhesive layer 26: Top coat layer 27: Print layer 27a: Print layer The part where is not formed

Claims (2)

On one side of the transparent resin film,
Providing a printing layer,
A metal foil having a thickness of 3 to 10 μm is laminated through a transparent adhesive layer that transmits light so as to cover the entire printed layer,
Covering the metal foil in contact with the outer surface of the can body made of tin-free steel through an adhesive layer,
Metal foil laminated film with the can body obtained by forming a top coat layer on the other surface of the transparent resin film after coating on the can body. The top coat layer formed on the other surface of the transparent resin film,
The can with a metal foil laminate film according to claim 1, wherein a printed layer is provided on the other surface of the transparent resin film so that the printed layer is entirely covered .

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