CN103813967A - Package and printing method therefor - Google Patents

Abstract

The invention addresses the problem of providing a package that does not develop a water-stained appearance even when a package with a very smooth printed surface is wrapped with a closely adhesive film, and a printing method therefor. The package is provided with: a base sheet, which configures the main body of the package; a colored ink layer, which is obtained from at least one colored ink that has been applied on the base sheet; a smooth gloss layer that confers a glossy feel to the colored ink layer; and a protrusion layer in which a transparent varnish is printed as protrusions on the gloss layer under prescribed conditions that preserve the glossy feel of the colored ink layer.

Description

Packaging and its printing method

technical field

The present invention relates to the technology of packaging and its printing method.

Background technique

Soft pack type packs, hard case type packs, and the like are known as packs for storing objects such as cigarette products. In addition, on these packages, brands, company names, and the like are printed on the surface of the package using various printing techniques.

On the other hand, not limited to packaging printing, a printing technique using a varnish that imparts a glossy or matte feel to a printed surface is known as one of known printing techniques (for example, see Patent Documents 1 and 2). For example, Patent Document 1 discloses a technique for forming an ultraviolet curing type varnish layer.

prior art literature

patent documents

Patent Document 1: (Japanese) Unexamined Patent Publication No. 2004-114654

Patent Document 2: (Japan) Utility Model Publication No. 7-11580

Contents of the invention

Problems to be solved by the present invention

If a package with a smooth printing surface is packaged with a film with high adhesion such as a shrink film, the film will adhere to the printing surface, and as shown in Figure 1, wetting may occur on the adhered part as if wet by water droplets. trace. This is because the film is partially adhered to the printed surface of the package, as shown in FIG. 2 which shows the part indicated by the symbol X in the AA cross section of FIG. 1 .

This kind of phenomenon can be applied to the base paper with high smoothness and gloss such as cast-coated paper, paper laminated with aluminum-deposited PET film, paper with deposited aluminum on the film, etc., to implement characters or graphics, etc. Especially in the case of printing and applying varnish.

The present invention has been made in view of the above-mentioned problems, and aims to provide a package and a printing method thereof that do not cause wet marks even when packaging a package having a highly smooth printing surface using a highly adhesive film.

Technical solutions for solving problems

In order to solve the above-mentioned problems, the present invention prints a clear varnish in a convex shape on a smooth glossy layer that imparts a glossy feeling to a color ink layer.

Specifically, the package of the present invention includes: base paper constituting the main body of the package, a color ink layer composed of at least one layer of color ink coated on the base paper, and a smooth glossy layer that imparts a sense of gloss to the color ink layer. A convex layer obtained by printing a transparent varnish in a convex shape on the glossy layer under predetermined conditions to maintain the glossiness of the color ink layer.

The package of the present invention is characterized in that at least a part of the glossy layer has a convex layer in which protrusions are formed in a convex shape under predetermined conditions to maintain the glossiness of the color ink layer. Therefore, even if the package is packaged with a highly adhesive film such as a shrink film, the film will separate from the glossy layer due to the convex layer. Thereby, even if a package is packaged using a highly adhesive film such as a shrink film, the film does not adhere to a glossy and smooth printing surface to cause wetting marks to appear. This package is suitably used as a cigarette package for storing cigarettes, for example.

Here, the predetermined condition refers to the condition of maintaining the glossy feeling of the color ink layer given by the glossy layer, for example, making the protrusions constituting the convex layer not affect the glossy feeling of the color ink layer with the naked eye. The conditions of the shape, pattern, size, or interval of the protrusions are determined by appropriate tests based on the glossiness expressed by the glossy layer, the color of the colored ink layer, and the like.

As a convex layer that satisfies this condition, for example, a convex layer with an area of about 0.003 to 0.006 ^mm2 is formed on the upper surface of one convex, and a convex layer is printed with a screen number of about 150 to 200 lpi. Dot-shaped convex layer, convex layer formed in the range of 150 to 200 lpi with screen count, convex layer formed in height of 1 μm or less, convex layer printed with ultraviolet curable transparent varnish in convex shape, or When the mesh line number is 150lpi, the dots with an area ratio of 10-21% are printed and the protrusions are printed as a dot-shaped convex layer. When the mesh line number is 175lpi, the dots with an area ratio of 14-29% are printed and The embossing is printed as a dot-shaped convex layer, and when the mesh line number is 200lpi, the halftone dot with an area ratio of 19 to 38% is printed and the embossment is formed into a dot-shaped convex layer. If the convex layer is constituted in this way, the glossiness of the color ink layer provided by the glossy layer will be maintained, and the film will not adhere to the glossy smooth printing surface to show wetting marks. In addition, when the area of one raised upper surface portion is less than 0.003 mm ² , wetting marks may be generated, and when it is larger than 0.006 mm ² , the glossiness may decrease. In addition, when the mesh line number is less than 150 lpi, wetting marks will be generated, and when it is more than 200 lpi, it is difficult to print by ordinary printing technology. In addition, when the area ratio of halftone dots is smaller than the area ratio corresponding to each screen ruling, wetting marks will be generated, and if it is larger than the area ratio corresponding to each screen ruling, the glossiness will be reduced.

Furthermore, the protrusions of the convex layer may be formed regularly over the entire surface of the package, for example. If the protrusions of the raised layer are formed regularly over the entire surface of the packaging, no wetting marks will be produced anywhere on the packaging.

In addition, the present invention can also be realized in terms of printing methods. For example,

The present invention relates to a packaging printing method, which may include: a color ink layer printing process of printing at least one color ink layer on the base paper constituting the packaging body; Glossy layer printing process of a smooth glossy layer that imparts a glossy feeling to the ink layer, and a convex layer printing process of printing a clear varnish in a convex shape on the glossy layer in predetermined stripes that maintain the glossy feel of the color ink layer .

Invention effect

According to the present invention, even if a package having a highly smooth printed surface is packaged using a highly adhesive film, no wet marks will appear.

Description of drawings

Fig. 1 is the perspective view of existing packing;

Fig. 2 is the sectional view of the paper body of existing packaging with film packaging;

Fig. 3 is a perspective view of the package of the embodiment;

Figure 4 is a cross-sectional view of a paper body corresponding to the a-a section of Figure 3, the paper body constituting a printed package;

5 is a flow chart showing the steps of the printing method of the embodiment;

Fig. 6 is a diagram showing an example when the shape pattern of protrusions constituting the convex layer is made into dots;

Fig. 7 is a diagram showing an example when the shape pattern of protrusions constituting the convex layer is linear;

FIG. 8 is a diagram showing an example when the shape pattern of protrusions constituting the convex layer is made into a lattice.

Detailed ways

Next, embodiments of the present invention will be described. Embodiment shown below is an illustration of embodiment of this invention, and does not limit the technical scope of this invention to the following form.

As shown in FIG. 3 , the cigarette package 1 of the embodiment (hereinafter simply referred to as the package) is a hard box type package. The package 1 has a rectangular parallelepiped shape composed of a main body 2 and a cover 3 , and the cover 3 can be freely opened and closed about a hinge 4 located on the upper back of the main body 2 as an axis. Cigarettes (leaf cigarettes), cigarillos, electronic cigarettes, smokeless cigarettes (chewing tobacco, snuff), etc., which are cigarette products, can be accommodated inside the package 1 . On the package 1, the brand and company name, content display, etc. are printed on the surface, and all or part of the printed display is covered by offset printing clear coat varnish, such as UV coating varnish (coating varnish for surface gloss) cover. In addition, the package 1 may be not only a package for storing cigarettes, but also a package for storing various items.

Here, clear coat varnishes are divided into two types: water-based clear coat varnishes and UV-curable clear coat varnishes cured by ultraviolet rays, and are classified into a glossy type with high gloss and a matte type with low gloss, respectively. Glossiness, abrasion resistance, heat resistance, and scratch resistance are required as properties required for clear coat varnishes used for cigarette packaging. In the present invention, it is particularly preferable to use a clear coat varnish excellent in gloss, and in this embodiment, for example, a glossy UV clear coat varnish is used. Specifically, "ダイキュア" (registered trademark) Clear UV series (trade name) manufactured by DIC Corporation, FD Clear Coat SPC (trade name) manufactured by Toyo Ink Co., Ltd., etc. are mentioned. In addition, preferably, the thickness of the glossy layer formed from the clear coat varnish in the present invention is 2 μm or more.

FIG. 4 shows a section of a paper body constituting a printed package, in particular, a section indicated by a symbol Y in the BB section of FIG. 3 . As shown in FIG. 4 , the paper body of the package 1 according to the embodiment is printed to form a base paper 21 , a color ink layer 22 , a glossy layer 23 , and a convex layer 24 .

The base paper 21 is a base material of a paper body constituting the main body 2 and the cover 3 of the package 1 . Base paper 21 can use base paper with high smoothness and gloss, for example, cast-coated paper or paper with PET (Polyethylene terephthalate, polyethylene terephthalate) film with aluminum deposited on it, transfer with deposited aluminum Paper on aluminum on film.

The color ink layer 22 is a layer formed by printing color ink on the surface of the base paper 21 . The color ink layer 22 is a layer for displaying the design of the package 1, and displays a brand, a company name, content display, and the like. In addition, in FIG. 4, one color ink layer is formed as the color ink layer 22, but the number of color ink layers can be appropriately changed according to the design of the package. In addition, the color ink layer 22 may also include a high-brightness metallic color ink layer.

The glossy layer 23 is formed, for example, by printing a clear coat varnish on the surface of the color ink layer 22, and is a layer with high smoothness. The glossy layer 23 protects the color ink layer 22 from damage and contamination, and also imparts glossiness to the surface of the color ink layer 22 .

In addition, the package 1 may be embossed, debossed, or concave-convex processed on the surface.

FIG. 5 shows the steps of the printing method of the embodiment. In the color ink layer printing step ( S01 ), the color ink layer 22 is printed on the base paper 21 . The color ink used is appropriately selected according to the design of the package 1. Next, in the glossy layer forming step ( S02 ), the glossy layer 23 is formed by performing OP (OverPrint) varnish processing on the surface of the ink 22 .

The color ink layer printing step ( S01 ) or the glossy layer forming step ( S02 ) can also be realized by known printing techniques such as gravure printing, offset printing, and offset UV printing. When gravure printing is used, it can be printed using a known printing machine. In addition, when other known printing techniques are used, printing can be performed using a printer corresponding to the known printing techniques.

Next, in the convex layer forming step (step S03 ), a transparent ultraviolet curable UVOP varnish is offset-printed in spots on the surface of the smooth glossy layer 23 .

Here, OP varnishes are divided into three types: water-based, oil-based, and UV-curable, which exerts effects by ultraviolet rays, and are classified into glossy types with high gloss and matte types with low gloss. Glossiness, transparency, heat resistance, scratch resistance, etc. are required as characteristics required for OP varnishes for cigarette packaging. In the present invention, it is particularly preferable to use an OP varnish that is excellent in gloss and transparency and is easy to form bumps, and in this embodiment, for example, a glossy UVOP varnish is used. In addition, preferably, the thickness of the convex layer formed from the UVOP varnish in the present invention is 1 μm or less.

When packaging the package 1 with a highly adhesive film such as a shrink film, the convex layer 24 prevents the surface of the glossy layer 23 from adhering to the film through the convex varnish, and prevents wet marks such as water droplets from appearing on the adhering part. , so that the protrusions are formed to such an extent that the glossiness of the glossy layer 23 is not lost. Specifically, when the convex layer 24 is formed by offset UV printing, for example, the area of the upper surface of one convex is formed to be about 0.003 to 0.006 mm ² . When the ratio is about 10 to 40%, the convex layer 24 can be formed to the extent that the glossiness of the layer 23 does not lose its luster visually. In more detail, for example, when the screen line number is 150lpi, the printing area ratio is 10-21% of dots and the protrusions are printed as dots; when the screen line number is 175lpi, the printing area ratio is 14-21%. 29% of the dots and the protrusions are printed in dots. When the screen line number is 200lpi, the dots with an area ratio of 19-38% are printed and the protrusions are printed in dots. Convex layer 24 that loses glossiness of glossy layer 23 . In addition, it is more preferable that if the thickness of the convex layer is 1 μm or less, the convex layer 24 can be further formed to such an extent that the glossiness is not impaired. In the convex layer 24, a transparent varnish such as UVOP varnish is formed in a convex shape, and therefore, there is no requirement for a screen angle.

When forming the glossy layer 23 or the convex layer 24 by offset UV printing, it can select suitably according to the coating method, such as a roll coater and a chamber coater, and a coating agent.

In addition, the printing conditions when forming the convex layer 24 are not limited to these conditions, as long as the glossy feeling of the colored ink layer 22 given by the glossy layer 23 is maintained, and the protrusions constituting the convex layer 24 cannot be seen from the colored ink layer with the naked eye. Within the scope that the glossiness of 22 affects, then the shape pattern, size, and interval of the projections constituting the convex layer can be determined according to the glossiness exhibited by the glossy layer 23 or the color of the colored ink layer 22, etc. through appropriate tests.

If the varnish used to form the convex layer 24 is a UVOP varnish that cures immediately upon irradiation with ultraviolet rays, it is easy to form bumps. However, varnishes composed of other components can also be used as long as they can form bumps.

In addition, in the convex layer 24, the protrusions may be formed in dot shapes as shown in FIG. 6, the protrusions may be formed in a line shape as shown in FIG. grid shape. However, in view of the requirements of the convex layer 24 that no wetting marks appear on the closely-contacted portion and the glossiness of the glossy layer 23 is not lost, it is preferable to form the protrusions in a dot shape that covers a small area of the glossy layer 23 .

In addition, with respect to the convex layer 24, the protrusions may be formed regularly throughout the entire surface of the package 1, or may be formed on parts that would have a large impact on aesthetics if wet marks occur (such as the front, back, or implementation of the package 1). Parts that have undergone pressure processing) and other local formations.

Since the above-mentioned package 1 has the convex layer 24 formed on the surface of the glossy layer 23, even if the package 1 is packaged with a highly adhesive film such as a shrink film, it is possible to maintain the glossy feeling of the glossy layer 23 without causing any damage to the adhered part. Shows signs of wetting. Therefore, even if the package 1 is packaged with a thin film such as a shrink film, it is possible to maintain the glossiness of the printed surface without deteriorating aesthetics due to the appearance of wet marks.

In addition, in the above-mentioned embodiment, the box-type package opened at the top was described as an example, but it is also applicable to packages opened on the right or left side, packages with chamfered corners, and the like, for example.

Explanation of reference signs

1 pack (cigarette pack)

2 subject

3 cover

4 fold

21 base paper

22 colored ink layers

23 Gloss layer

24 convex layers

Claims (16)

1. a packing, is characterized in that, comprising:

Form packing main body body paper,

Be coated on colored ink layer that at least one deck colored ink on described body paper forms,

To described colored ink layer give reflecting feel level and smooth gloss layer,

Clear varnish is printed as the protruding layer that convex forms by rated condition with the reflecting feel that keeps described colored ink layer on described gloss layer.

2. packing as claimed in claim 1, is characterized in that, the whole surface that the projection of described protruding layer spreads all over described packing forms regularly.

3. packing as claimed in claim 1 or 2, is characterized in that, described protruding layer makes the area of a protruding upper surface portion be formed on 0.003～0.006mm ²scope in.

4. the packing as described in any one in claim 1～3, is characterized in that,

Described protruding layer is formed in the scope of 150～200lpi screen ruling.

5. the packing as described in any one in claim 1～4, is characterized in that,

The height of described protruding layer is formed on below 1 μ m.

6. the packing as described in any one in claim 1～5, is characterized in that,

Described protruding layer is for being printed as ultra-violet solidified clear varnish on the protruding layer of convex.

7. the packing as described in any one in claim 1～6, is characterized in that,

Described protruding layer, in the time that screen ruling is 150lpi, that to be printed with Area Ratio be 10～21% site the structure that projection is printed as to point-like, in the time that screen ruling is 175lpi, that to be printed with Area Ratio be 14～29% site the structure that projection is printed as to point-like, in the time that screen ruling is 200lpi, is that to be printed with Area Ratio be 19～38% site and makes to convex to form the structure into point-like.

8. the packing as described in any one in claim 1～7, is characterized in that,

The described cigarette pack that is packaged as.

9. a printing process for packing, is characterized in that, comprising:

On the body paper of main body that forms described packing, print one deck colored ink layer at least colored ink layer printing process,

On described colored ink layer printing to described colored ink layer give the level and smooth gloss layer of reflecting feel gloss layer printing process,

On described gloss layer to keep the regulation bar of reflecting feel of described colored ink layer clear varnish to be printed as to the protruding layer printing process of convex.

10. the printing process of packing as claimed in claim 9, is characterized in that,

The whole surface that the projection of described protruding layer spreads all over described packing forms regularly.

The printing process of 11. packings as described in claim 9 or 10, is characterized in that,

Described protruding layer makes the area of a protruding upper surface portion be formed on 0.003～0.006mm ²scope in.

The printing process of 12. packings as described in any one in claim 9～11, is characterized in that,

Described protruding layer is formed in the scope of 150～200lpi screen ruling.

The printing process of 13. packings as described in any one in claim 9～12, is characterized in that,

The height of described protruding layer is formed on below 1 μ m.

The printing process of 14. packings as described in any one in claim 9～13, is characterized in that,

The protruding layer that described protruding layer forms for ultra-violet solidified clear varnish being printed as to convex.

The printing process of 15. packings as described in any one in claim 9～14, is characterized in that,

In described protruding layer printing process, in the time that screen ruling is 150lpi, printing area is than being 10～21% site and projection being printed as to point-like, in the time that screen ruling is 175lpi, printing area is than being 14～29% site and projection being printed as to point-like, in the time that screen ruling is 200lpi, printing area is than being 19～38% site and making to convex to form into point-like.

The printing process of 16. packings as described in any one in claim 9～15, is characterized in that,

The described cigarette pack that is packaged as.

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