WO2021075281A1

WO2021075281A1 - Printing metal container

Info

Publication number: WO2021075281A1
Application number: PCT/JP2020/037552
Authority: WO
Inventors: 久彰森川; 幸司山田; 清澄眞仁田
Original assignee: 東洋製罐株式会社
Priority date: 2019-10-15
Filing date: 2020-10-02
Publication date: 2021-04-22
Also published as: TW202128507A; JPWO2021075281A1

Abstract

The present invention relates to a printing metal container in which a print image is formed on at least an outer surface of a container barrel part. By forming a pseudo three-dimensional print image as if irregular shape processing based on data by a three-dimensional scanner were applied as the print image, it is possible to provide a metal container that is capable of maintaining buckling strength and/or paneling strength and has a pseudo three-dimensional print image having appearance characteristics as if irregular shape processing were applied without impairing mechanical strength of the metal container.

Description

Printed metal container

The present invention relates to a printed metal container having a pseudo 3D printed image, and more specifically, to a printed metal container having the same appearance characteristics as those subjected to deformed processing while maintaining the mechanical strength of the container. ..

Metal containers such as metal cans have various irregular shapes such as embossing and beading to enhance the decorativeness of the container and the tactile sensation when gripped, or the side wall of the container is formed from a circumferential polyhedron. It is processed to increase its commercial value.
Since such irregular shape processing is an additional processing performed in a normal metal container molding process, the number of processes increases, and productivity and economy are inferior. Further, in the field of seamless cans, since the thickness of the can body is reduced in order to reduce the weight, if a part of the can body is asymmetrically deformed, stress on the processed portion is applied. Mechanical strength such as buckling strength may decrease due to concentration. Further, for example, in the above-mentioned can in which the side wall of the container is made of a circumferential polyhedron, the intersecting portion of the ridge line protrudes to the outside of the can relative to the constituent unit surface, so that the portion is from the outside as compared with other portions. In addition to the possibility that an impact is easily applied, the buckling strength and the paneling strength may be lowered for the same reason as described above, and the mechanical strength of the container may be lowered.

By the way, it has been proposed to give a three-dimensional decoration to the surface of a metal container by printing. For example, in Patent Document 1 below, a heat-shrinkable tubular label that can be attached to an object to be attached such as a container by heat shrinkage. In the above, based on the two-dimensional image data obtained by three-dimensionally expressing the three-dimensional model on a plane by performing three-dimensional correction processing on the data obtained by actually measuring the uneven height and color of the three-dimensional model surface. A heat-shrinkable tubular shape characterized in that a three-dimensional design display in which the portion corresponding to the convex portion on the surface of the three-dimensional model is bright and the portion corresponding to the concave portion is dark is printed on the tubular label body. Labels have been proposed.

Further, in Patent Document 2 below, a striped pattern in which a plurality of streaky cells are continuously formed in the circumferential direction of the can body is printed on the peripheral wall of the can body, and the gradation inside the cells changes in the circumferential direction of the can body. The boundary of adjacent cells is displayed by the discontinuity of brightness, and one end of the cell in the circumferential direction is darker than the other end, and the brightness is in the middle of one end and the other end. A metal can in which a bright part, which is the apex of the can, is formed has been proposed.

On the other hand, using a multi-angle scanner (3D scanner) that can accurately reproduce fine surface structures such as surface roughness and flatness that cannot be captured by normal scanning from directly above, a subject with irregularities (hereinafter, "" A printed matter that realistically reproduces the state of the surface of an object (sometimes referred to as a "3D scan object") has been created (Patent Document 3).
The present inventors have a printing substrate having a clear printing layer having a three-dimensional printed image (hereinafter, may be referred to as "pseudo 3D printed image") obtained based on the data obtained by the 3D scanner, and a printing substrate thereof. A manufacturing method was proposed (Japanese Patent Application No. 2019-24594).

Japanese Unexamined Patent Publication No. 2006-201534 Japanese Unexamined Patent Publication No. 2016-94222 Japanese Patent No. 4373492

According to the pseudo 3D printed image, the present inventors can impart the same appearance as that of the deformed metal container without actually performing the deformed shape processing, and further perform the deformed shape processing. It was found that the mechanical strength of the metal container was not reduced as in the case of application.
Therefore, an object of the present invention is to provide a metal container having a pseudo 3D printed image as if it has been deformed, without impairing the mechanical strength of the metal container.

According to the present invention, in a printed metal container in which a printed image is formed on at least the outer surface of the container body of the metal container, the printed image is a pseudo 3D printed image based on data obtained by a 3D scanner, and the printed metal container is immediately before printing. Provided is a printed metal container characterized by maintaining the buckling strength and paneling strength of the above.

In the printed metal container of the present invention
1. 1. The thickness of the body of the metal container is 230 μm or less.
2. The pseudo 3D printed image is a printed image having a line number of 100 lpi or more and / or a resolution of 300 dpi or more.
3. 3. The pseudo 3D printed image is a reproduction image of a 3D scan object having a surface unevenness step amount of 50 mm or less.
4. The 3D scan object is a base material that has been deformed.
5. The pseudo 3D printed image is formed on at least a part of the outer surface of the metal container.
6. A diffused reflection layer is formed on the pseudo 3D printed image.
7. The metal container is an aluminum seamless can,
8. The metal container is an aluminum seamless can with a deformed body.
Is preferable.

In the printed metal container of the present invention, the printed metal has the same appearance as the deformed metal container without lowering the buckling strength (strength against the load in the axial direction of the container) and the paneling strength (strength against the external pressure). Containers can be provided. Moreover, by making a pseudo 3D printed image having a screen line number of 100 lpi or more and / or a resolution of 300 dpi or more, it is possible to realistically reproduce a 3D scan object that has been subjected to irregular shape processing.
That is, as described above, the mechanical strength of the metal container may decrease due to the deformed processing applied to the metal container, and this tendency is particularly remarkable in the seamless can which has been thinned for weight reduction. On the other hand, in the printed metal container of the present invention, the deformed base material is converted into data by a 3D scanner and printed on the seamless can body without performing such deformation processing. As a result, even if the seamless can is thinned, it is possible to impart the same appearance characteristics to the seamless can as if the deformed shape was processed by the pseudo 3D printed image without lowering the buckling strength and the like.

It is a photograph (bamboo) of a prototype (aluminum seamless can with a pseudo 3D image printed) having a maximum score of 9 created in the example. It is a photograph (cork) of a prototype (aluminum seamless can with a pseudo 3D image printed) having a maximum score of 9 created in the example.

(Printed metal container)
Since the printed metal container of the present invention is a printed metal container in which a pseudo 3D printed image based on data obtained by a 3D scanner, which looks like a deformed metal container, is formed on the outer surface of the metal container, it has mechanical strength (bending strength). And / or the deformation processing that reduces the paneling strength) is not actually performed, so that the mechanical strength is maintained before and after printing.
In the present invention, the deformed processing is a processing for forming point-shaped, linear or planar unevenness, and exemplifies machining such as embossing, bending, beat processing, laser engraving, embossing, foam molding and the like. can do.
The printed metal container is then subjected to opening processing such as necking processing and screw processing according to the desired shape to be taken by the metal container, but the buckling strength after printing in the present invention is performed. (Strength against axial load) and paneling strength (strength against external pressure) relate to the printed metal container before processing these openings.

[Print image]
In the printing substrate of the present invention, the pseudo 3D printed image is an image printed based on data acquired from a 3D scan object using a 3D scanner, and the number of screen lines is 100 lpi or more and / Alternatively, it is desirable to consist of a high-definition printed image having a resolution of 300 dpi or more. Since the printed image is formed with the number of screen lines and resolution in the above range, the stereoscopic effect of the 3D scanned object can be finely and clearly expressed as a pseudo 3D printed image on a flat surface (curved surface) with high accuracy. It becomes possible to give the viewer the impression that the deformed shape is actually applied. Further, the larger the number of screen lines and the resolution, the higher the definition of the printed image can be formed.
Further, the printed image may be locally formed on a part of the outer surface of the metal container. That is, when the metal container is actually subjected to deformed processing, if it is locally formed in a part, the mechanical strength of the metal container decreases due to stress concentration on the processed portion as described above, but in the printed metal container of the present invention. Even if it is locally and asymmetrically formed in a part, there is no possibility of such a decrease in mechanical strength.

As a printing method for forming a pseudo 3D printed image, a conventionally known printing method can be adopted. Examples of the printing method include, but are not limited to, inkjet printing, waterless flat plate printing, gravure printing, resin letterpress printing, flexo printing, direct plate making printing, screen printing, and the like. It is desirable to print a printed image having a line number of 100 lpi or more by waterless slab printing, and it is desirable to print a printed image having a resolution of 300 dpi or more by inkjet printing.
The pseudo 3D printed image may be formed by a plurality of printing methods. The pseudo 3D printed image may be formed on the entire surface or a part of the substrate, or may be combined with a flat normal printed image.

Further, as will be described later, the pseudo 3D printed image may be a printed image printed based on data formed by combining a plurality of data obtained from a plurality of 3D scan objects. As a result, pseudo 3D printed images produced by different shapes of materials and irregularities can be combined to form a printed image having excellent design.
Further, the printed image may be combined with a printed image for displaying information such as a product description, a date of manufacture, or a two-dimensional code, in addition to the pseudo 3D printed image described above, but printing for displaying information. It is desirable that the image is formed in the non-printed area of the pseudo 3D printed image because the design of the pseudo 3D printed image is not impaired. Further, the printed image for displaying such information is desirable because each feature is conspicuous because it is printed by a printing method different from that of the pseudo 3D printed image.

From the viewpoint of clearly reproducing a three-dimensional image, the pseudo 3D printed image is preferably reproduced from inks having four or more colors (yellow, magenta, cyan, black) or more.
Further, even if printing is performed using ordinary printing ink, it is possible to form a printed image having a three-dimensional effect in which surface irregularities and the like are accurately reproduced, but a foaming ink containing heat-expandable microcapsules in the printing ink is used. It is possible to have a highly-designed printed image with a more three-dimensional effect by being printed by printing, thick printing by inkjet printing, or formed by tactile printing.

[3D scan target]
The 3D scan target that is the original image of the printed image is the material itself such as woodblock print, oil painting, stained glass, knitting, textile, patchwork, etc., stereolithography by 3D printer, thick printing by inkjet printing, tactile. Examples thereof include printed matter such as printing, or processed matter in which a three-dimensional part is formed by embossing, bending, machining such as laser engraving, embossing, foam molding, etc., and these alone or 2 It is possible to form a 3D scan target by combining seeds or more, but in the present invention, among the above-mentioned 3D scan targets, the base material is a substrate that has been subjected to deformed processing such as embossing or bending. Is desirable. That is, as described above, when the metal container thinned for weight reduction is actually subjected to such deformation processing, the mechanical strength of the metal container is lowered, but the deformed base material is used. By printing a pseudo 3D printed image from this scan data on a metal container as a 3D scan object, the metal container is given the same decorative effect as that of the deformed processing without impairing the mechanical strength of the metal container. It becomes possible to do.
Further, as long as the surface of the 3D scan object has irregularities, the amount of steps of the irregularities is not particularly limited, but it is preferably 50 mm or less, particularly 30 mm or less.

[Metal container]
The metal container used in the present invention is not limited to this, but is a surface-treated steel plate such as an aluminum plate, an aluminum alloy plate, and tin-free steel, a tin plate, a chrome-plated steel plate, an aluminum-plated steel plate, a nickel-plated steel plate, and a tin-nickel-plated steel plate. , Various types of metal cans such as seamless cans in which various metal plates such as various alloy-plated steel plates are formed by drawing, ironing, re-drawing, etc., and welded cans can be exemplified. Further, a resin film such as a polyester film, a nylon film, or a polypropylene film may be laminated on the surface of the metal can.
When the metal container is a steel can or the like, a white coat layer may be formed for the purpose of correcting the background color of the metal container and reducing the influence on the printed image. As the white coat layer, a conventionally known one can be used. For example, a white pigment such as titanium oxide or zinc oxide is placed in a solvent together with a thermosetting, ultraviolet curable, or electron beam curable resin binder. It can be formed by applying and drying a dispersed white ink, and then curing it by heating, ultraviolet irradiation, electron beam irradiation, or the like.
The thickness of the metal container is not particularly limited, but as described above, the printed metal container of the present invention can have an appearance as if it has been deformed even when it is thinned for weight reduction. It can also be suitably applied to an aluminum seamless can having a body thickness of 230 μm or less.
In particular, in the present invention, an aluminum seamless can in which the container body is deformed can be preferably used, and the deformed shape and the pseudo 3D printing are combined and shown in the results of Examples described later. The design can be improved.

[Diffuse reflection layer]
In the printed metal container of the present invention, when the metal container has a surface gloss, it is preferable that a transparent diffused reflection layer is formed on the above-mentioned pseudo 3D printed image. .. By forming the diffused reflection layer, the printed image can be clearly seen, and the light incident on the printed image is diffusely reflected to eliminate the gloss, and the three-dimensional effect such as surface unevenness and texture of the printed image is impaired. It becomes possible to be visually recognized without any need.
The diffused reflection layer is preferably formed on the outermost surface of the print substrate and at least on the above-mentioned printed image, and may be formed directly on the printed image or via a transparent film. When the printed image is partially formed on the base material, it may be formed so as to cover the entire surface of the base material, or it may be formed only on the portion where the printed image is formed. Good.
As the diffused reflection layer, various materials can be used as long as the surface gloss of the printing substrate can be reduced, such as forming fine irregularities on the surface, but it is preferably made of a matte varnish layer or a matte film. The matte varnish is made by blending a matting agent with a finishing varnish conventionally used as a transparent top coat layer, and the matte film is made by blending a matting agent with a transparent resin film. It is a thing.

A conventionally known transparent thermosetting resin is used as the finishing varnish (top coating agent) that constitutes the matte varnish layer. For example, a thermosetting polyester resin, acrylic resin, epoxy resin, or the like is used as a base resin. It is a coating composition containing an amino resin such as a phenol resin or a melamine resin, an isocyanate resin, or the like as a curing agent, and is appropriately dissolved in an organic solvent.
Further, as the transparent resin film constituting the matte film, conventionally known transparent thermoplastic resins such as olefins such as low-density polyethylene, high-density polyethylene, polypropylene, poly1-butene, and poly4-methyl-1-pentene are used. Based resin; ethylene / vinyl copolymer resin such as ethylene / vinyl acetate copolymer, ethylene / vinyl alcohol copolymer, ethylene / vinyl chloride copolymer; polystyrene, acrylonitrile / styrene copolymer, ABS, α- Styrene-based resins such as methylstyrene / styrene copolymers; vinyl-based resins such as polyvinyl chloride, polyvinylidene chloride, vinyl chloride / vinylidene chloride copolymers, methylpolyacrylate, polymethylmethacrylate, etc .; nylon 6, nylon 6 From polyamide resins such as -6, nylon 6-10, nylon 11, nylon 12; polyester resins such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate; polycarbonate; polyphenylene oxide; biodegradable resins such as polylactic acid; It may be formed. In general, polyester such as polyethylene terephthalate can be preferably used in that it has excellent transparency and heat resistance.

The matting agent to be blended in the finishing varnish or the transparent resin film includes those composed of inorganic particles such as silica, aluminum hydroxide, aluminum oxide, calcium carbonate and magnesium carbonate, and organic materials such as silicone resin, acrylic resin and polyethylene. Can be exemplified by those composed of the powder or beads of. Among these, silica can be particularly preferably used, and among these, those having an average particle size in the range of 1 to 10 μm can be preferably used. When the average particle size of silica is within the above range, the incident light can be efficiently diffusely reflected to reduce the surface gloss, and the printed image can be visually recognized without impairing the three-dimensional appearance such as surface unevenness and texture. become.
The matting agent is preferably contained in the finishing varnish or the transparent resin film in the range of 1% by weight or more, particularly 10 to 20% by weight of the resin solid content. If the amount of the matting agent is smaller than the above range, the matting effect cannot be sufficiently exhibited, and the three-dimensional appearance of the printed image may be impaired. Further, when the amount of the matting agent is larger than the above range, the coatability is inferior to that in the above range, and the scratch resistance may be lowered.

The thickness of the diffused reflection layer cannot be unconditionally specified depending on the application of the printing substrate, but generally, it is preferably in the range of 1 to 20 μm in the case of the matte varnish layer, and in the range of 8 to 50 μm in the case of the matte film. Is preferable.

[Other layers]
In the printed metal container of the present invention, a printed image can be directly formed on the metal container, but a base coat layer such as a white solid printing layer and / or an anchor coat layer conventionally used for forming a printing layer can be formed. , It is also possible to form a printed image via a base film.
Similar to the white coat layer formed on the metal container, the white solid printing layer can correct the background color of the metal container to reduce the influence on the printed image, and can form a clear image. It will be possible. As the white solid printing layer, the same white coat layer as described above can be used.
Further, by forming the anchor coat layer, it is possible to improve the adhesion of the printed image to the substrate. The anchor coat layer can be formed by using an anchor coating agent known per se, for example, a thermosetting, ultraviolet curable or electron beam curable polyester resin, a thermosetting acrylic resin, or an epoxy. It is formed by applying and drying a coating liquid in which a resin, polyurethane resin, or the like is dispersed or dissolved in a predetermined solvent, and then curing by heating, ultraviolet irradiation, electron beam irradiation, or the like.

(Manufacturing method of printed substrate)
The method for producing a printing substrate of the present invention includes a step of creating a 3D scan object having a surface unevenness step amount of 50 mm or less, a step of scanning the 3D scan object with a 3D scanner to create print data, and the print data. Based on this, it has at least a step of printing a pseudo 3D printed image on a substrate.

As described above, it is preferable that the step amount of the surface unevenness is 50 mm or less, particularly 30 mm or less, as the 3D scan target object which is the original image of the printed image of the printing substrate of the present invention.
When data is edited on the surface of the above-mentioned 3D scan object using a 3D scanner and printing is performed by plate printing, plate making is performed based on the data.
At this time, only one type of data obtained from the 3D scan object may be used as it is, but plate making or printing may be performed by combining the data obtained from a plurality of 3D scan objects and editing the data. Can be done. As a result, the range of print design is widened, and it becomes possible to form a decorative pseudo 3D printed image having more excellent design.

As described above, the printing method can be printed by conventionally known methods such as inkjet printing, waterless plate printing, gravure printing, resin letterpress printing, flexo printing, screen printing, etc., but in the present invention, the number of lines is 100 lpi. It is preferable to print so as to form a printed image having the above and / or resolution of 300 dpi or more. This makes it possible to reproduce the three-dimensional effect of a 3D scan object having surface irregularities in a fine and clear manner.
In the present invention, among the above printing methods, it is preferable to form a printed image having the above screen number or resolution by waterless lithographic printing or inkjet printing. Further, in order to make the pseudo 3D printed image stand out, if necessary, a base coat layer such as the above-mentioned white solid layer or anchor coat layer is formed prior to printing.
Further, as described above, the printed image can also form a printed image for displaying information together with the pseudo 3D printed image. In this case, the decorativeness of the pseudo 3D printed image is not impaired after the pseudo 3D printed image is formed. As described above, it is desirable to form the pseudo 3D printed image in a non-printed area by inkjet printing or the like. Further, by combining with the three-dimensional pseudo 3D printed image in this way, it is possible to make each feature stand out.

The pseudo 3D printed image can be printed on a preformed metal container (seamless can) by curved surface printing, or can be printed on a metal plate and then molded. When the surface of the metal container is glossy, it is preferable to form the diffused reflection layer described above on the formed pseudo 3D printed image so as to be the outermost surface layer of the printing substrate. The diffused reflection layer may be either a matte varnish layer or a matte transparent resin film. Further, the body of the metal container after printing may be deformed.

For aluminum seamless cans with various body thicknesses, different prototypes were prepared in terms of the type of printed image and the presence or absence of deformed processing on the body, and are summarized in Table 1.
In Table 1, the pseudo 3D printed image is indicated by "A" and the non-pseudo 3D printed image is indicated by "B" with respect to the printed image. "A", light processing is indicated by "B", and strong processing is indicated by "C". When deformed, the rate of decrease in buckling strength (%) is also shown.

For each prototype, points were added based on the evaluation criteria shown below for each item of practicality due to cost, design due to printing, and practicality due to strength.
Since the cost is directly affected by the thickness of the body, the cost is set to 5 levels from no point addition to point addition 4 (++++).
As for the design property, since the improvement of the design property by the pseudo 3D printed image is the main effect of the present invention, a point addition of 3 (+++) was given when the pseudo 3D printed image was used.
Although the strength depends on the thickness of the body, 100 μm is added to 2 (++) and 280 μm is added to 4 (++++) to satisfy practicality.

Furthermore, the cost, design, and strength are affected by the deformed processing. The effects on each item were added as points 1 (+) or added 2 (++), deducted 1 (---) or deducted 2 (---).

In the comprehensive pass / fail judgment for commercialization based on the score (total of adjustments), the acceptance criteria was that the total of each item had a score of 7 or more and satisfied the practicality.
In addition, photographs of a prototype having the highest score of 9 in the pass / fail judgment (body thickness of 145 μm and no deformation processing) are shown in FIGS. 1 and 2.

The evaluation criteria for each item of practicality (cost), designability, and practicality (strength) of each prototype will be described in detail below.
(1) Cost Since the cost is due to the thickness of the body, the point added is 0 at 280 μm. A point was added at 230 μm, a point was added at 190 μm, a point was added at 145 μm, and a point was added at 100 μm.
Furthermore, the point was deducted by 1 by performing irregular shape processing. The deductions due to irregular shape processing are associated with the addition of processing processes, and the degree of processing may be light or strong.
In Table 1, in the case of 230 μm, it can be seen that when the deformed shape processing is performed, the added point 1 of the cost is offset by the deducted point 1 of the deformed shape processing and becomes 0 point.

(2) Designability The designability was set to 3 points when a pseudo 3D printed image was used as the printed image. In the case of a printed image that is not pseudo 3D, 0 points were set. Further, by performing irregular shape processing, points were added 1 or points 2.
In Table 1, it can be seen that 0 points are added for only the printed image that is not pseudo 3D, 3 points are added for only the pseudo 3D printed image, and 4 points or 5 points are added for the pseudo 3D printed image + irregular shape processing.

(3) Strength Since the thickness of the body is the main factor, a point of 4 was added at 280 μm. However, since practicality is satisfied even with a relatively thin thickness of 100 μm, a point of 2 was added. Other points were not graded, and points were added to 230 μm, 190 μm, and 145 μm.
Further, the strength was deducted by 1 by performing the deformed shape processing. In addition, the thinner the body thickness, the greater the effect on strength. Therefore, when the body thickness is 100 μm, the deduction is 1 for light processing and 2 for strong processing.
In Table 1, in the case of 100 μm, it can be seen that when the deformed processing of the strong processing is performed, the added point 2 of the strength is offset by the deducted point 2 of the deformed processing and becomes 0 point.

(Discussion)
Consider the pass / fail judgment in Table 1.
When a pseudo 3D printed image is printed and no deformation processing is performed, the score regarding cost, design, and strength is 7, a score of 230 μm, a score of 190 μm, a score of 9, 145 μm, and a score of 9, 100 μm, all of which are acceptable.
When a pseudo 3D printed image is printed and deformed, the score is 8 at 230 μm, 9 at 190 μm, 9 at 145 μm, and 8 at 100 μm.
In the case of 230 μm, points were added 0 in terms of cost, and in the case of 100 μm, points were added 0 in strength, which was a boundary area where practical problems occurred, but the score was as high as 8.
When a pseudo 3D printed image is printed with a body thickness of 280 μm, the score reaches 7, but the above-mentioned cost addition is 0, and the score is 1 less than the above-mentioned 230 μm and 100 μm. It can be seen that the thickness in the above is preferably 230 μm or less.
In the non-pseudo 3D printed image and the seamless can without deformation processing shown in the comparative example, the score was 4 to 6, and the passing score was not reached.
Although not shown in Table 1, when the seamless can on which the non-pseudo 3D printed image shown in the comparative example is formed is deformed, it is the same as the point addition element of the deformed processing in the example (230 μm, Since it is considered that 190 μm adds points 1, 145 μm adds 0 points, and 100 μm deducts 1), 230 μm gives a score of 5, 190 μm gives a score of 6, 145 μm gives a score of 6, and 100 μm gives a score of 5. Conceivable.
Therefore, it was found that a metal container having a body thickness of 230 μm or less on which a pseudo 3D printed image was printed is suitable.
Further, as is clear from FIGS. 1 and 2, the prototype printed with the pseudo 3D printed image gives the impression that the aluminum seamless can is like a container made of bamboo (Fig. 1) or cork (Fig. 2). It can be seen that it has a high degree of design.

In the present invention, since it is possible to provide a printed metal container having a deformed appearance without a decrease in buckling strength or paneling strength, it is difficult to perform deformed processing, and the body thickness is reduced to 230 μm or less. It can be suitably used for metal containers, especially aluminum seamless cans.

Claims

In a printed metal container in which a printed image is formed at least on the outer surface of the container body of the metal container.
A printed metal container characterized in that the printed image is a pseudo 3D printed image based on data obtained by a 3D scanner, and the printed metal container maintains buckling strength and / or paneling strength immediately before printing.
The printed metal container according to claim 1, wherein the thickness of the body of the metal container is 230 μm or less.
The printed metal container according to claim 1 or 2, wherein the pseudo 3D printed image is a printed image having a line number of 100 lpi or more and / or a resolution of 300 dpi or more.
The printed metal container according to any one of claims 1 to 3, wherein the pseudo 3D printed image is a reproduced image of a 3D scanned object having a surface unevenness step amount of 50 mm or less.
The printed metal container according to claim 4, wherein the 3D scan target is a base material that has been subjected to deformed processing.
The printed metal container according to any one of claims 1 to 5, wherein the pseudo 3D printed image is formed on at least a part of the outer surface of the metal container.
The printed metal container according to any one of claims 1 to 6, wherein a diffused reflection layer is formed on the pseudo 3D printed image.
The printed metal container according to any one of claims 1 to 7, wherein the metal container is an aluminum seamless can.
The printed metal container according to any one of claims 1 to 7, wherein the metal container is an aluminum seamless can in which the body of the container is deformed.