JP5428492B2 - Packaging material with printing information - Google Patents

Description

  The present invention relates to a packaging material with print information capable of printing variable information including fine characters and figures, preventing falsification of the printed variable information, and enabling high-precision reading of variable information.

  Paper boxes and paper cups using paper materials, and packaging containers and bags using plastic materials are used as products or product packaging in all fields. Product names and product designs for the packaging materials used for these products are used. A wide variety of displays such as product characteristics and explanation of handling, display of product capacity and raw materials, etc. are applied by printing methods such as offset printing and gravure printing. In general, the display as described above does not change over a long period of time. On the other hand, “variable information”, that is, production date, production lot number, and information that changes every moment, such as the expiration date and the quality retention date when the contents are food, are manufactured separately, for example. Generally, the variable information is directly printed on the outer surface of the packaging material by attaching a label on which the variable information is printed, or by an ink jet printer or the like. Recently, a large amount of information such as product information and campaign information is also notified by a two-dimensional code or the like, and in particular, campaign notification information is generally handled as short-term variable information.

Conventionally, it consists of a paper material with an inkjet receptive layer formed on the surface and a laminate with a heat seal layer laminated on the other side of the paper material, making it possible to record information such as images and characters on the surface by the inkjet method. A packaging material has been proposed (for example, Patent Document 1).
In addition, when the product is packaged, it cannot be seen from the outside. After purchasing the product, the packaging material is opened and the contents are taken out, and the information such as the unique number printed from the inside of the packaging material is visually confirmed. There has been proposed a packaging bag that can be applied and connected to a prize site such as a campaign and can be applied by inputting a unique number (for example, Patent Document 2).

JP 2003-291978 A

JP 2004-067219 A

  However, the invention of Patent Document 1 is made of a paper material such as a paper cup. In order to impart water resistance and heat sealability, for example, in a material having a low ink absorption capacity by laminating a resin such as polyethylene. In addition, it is possible to print on the surface by forming an ink jet receiving layer on one side of the material, but the packaging form is limited to paper cups and paper boxes, and display labels such as packaging bags and PET bottles There is a problem that it cannot be used for a packaging material made of a film such as, and the use is limited. Printing by ink jet printing on the surface of a plastic film used for a packaging container or a packaging bag is not strong in adhesion between the plastic material and the ink to be printed, and the ink is not absorbed and absorbed easily, and in particular, Fine characters and figures were poorly reproducible.

  In addition, the invention of Patent Document 2 includes the configuration “the outermost film layer, the transparent barrier layer, and the heat seal layer that are sequentially laminated, and the ink layer on the back surface of the outermost film layer. A concealing layer, a white ink layer, and a concealing information layer printed by an ink jet recording method in this order, and after printing on a plastic film by an ink jet method, the printed surface is protected by a heat seal layer. It is a thing. According to the above configuration, there is no problem in reading the print information provided on the white ink layer as long as the content to be printed is information that can be visually confirmed such as a unique number, but a two-dimensional encoding of a large amount of information. In the case of printing information such as codes, the reading is performed by a reading terminal such as a barcode reader or a mobile phone. For example, the color of the concealing layer made of an ink layer using an inorganic pigment such as carbon black as a colorant is changed to a white ink layer. In such a case, the image could not be sufficiently concealed, and there was a risk of an error in reading the print information provided on the white ink layer.

  Accordingly, an object of the present invention is to enable printing of minute variable information and the like by an ink jet method, in particular, to make clear printing of a two-dimensional code and the like, and to be influenced by a printed portion applied to a packaging material. It is another object of the present invention to provide a packaging material with print information that can read variable information without any alteration and prevent falsification of the printed variable information.

In order to solve the above-mentioned problem, the invention of claim 1 is characterized in that a base material layer provided with a printed layer on the back surface, a concealing layer, and a heat-adhesive resin layer as the innermost layer are sequentially laminated, An ink receiving layer and a variable information printing layer printed by an ink jet method are sequentially formed on the surface of the heat-adhesive resin layer side, and a concealment formed over the entire surface between the printing layer and the variable information printing layer A packaging material with printing information, characterized in that a layer is interposed between a printing layer printed with a general printing ink and a variable information printing layer printed by an inkjet method. In particular, it improves the reading accuracy of reading terminals such as barcode readers and mobile phones, and enables high-definition printing without bleeding by providing an ink receiving layer on the variable information printing surface of the concealing layer. Increases the amount of information that can be transmitted by the print.

  The invention according to claim 2 is characterized in that the concealing layer is made of a plastic film having a metal vapor deposition film, and the packaging material with print information according to claim 1, and the invention according to claim 3 is characterized in that the concealing layer is made of metal. The packaging material with print information according to claim 1, wherein the cover material is a plastic film having a metal vapor-deposited film or a concealing layer made of a metal foil such as aluminum, and a variable information print printed by an ink jet method. Therefore, it is easy to read with a reading terminal such as a barcode reader or a mobile phone.

  The invention according to claim 4 is the packaging material with print information according to claim 1, wherein the masking layer is made of a plastic film containing a white pigment, and the masking layer is made of a plastic film containing a white pigment. And variable information printing printed by the ink jet method can be formed, and can be easily read by a reading terminal such as a barcode reader or a mobile phone, and can be easily observed.

  The invention according to claim 5 is characterized in that the information printed on the variable information printing layer is variable information of 80 dpi or more × 80 dpi or more of the printing information. Since it is a packaging material and can reproduce finer and more information-intensive printing, it is possible to provide a larger amount of information from the seller side to the consumer, and consumers can trust the product through information acquisition. And convenience can be improved.

  The invention according to claim 6 is the packaging with printed information according to any one of claims 1 to 5, wherein the information printed on the variable information printing layer is variable information that can be recognized by a reading terminal. Since it is a material and prints a finer and larger amount of information that can be recognized by a reading terminal, a large amount of information can be provided and acquired.

  Since the packaging material with printing information of the present invention is provided with an ink receiving layer on the surface of the concealing layer on the side of the heat-adhesive resin layer, a large amount of information is obtained by an ink jet method on a plastic film having a metal vapor deposition film for forming the concealing layer. High-definition printing is possible, printing information is not visible from the outside before opening the packaging material, and can be confirmed after opening, and has a metal vapor deposition film between the printing layer and the variable information printing layer By providing a concealing layer made of a film, a metal foil such as aluminum, or a plastic film containing a white pigment, it is not affected by the printing layer, and reading accuracy by a reading terminal such as a barcode reader or a mobile phone. The packaging material which improved can be provided.

  In particular, by providing an ink-receiving layer on the concealing layer surface, which is the variable information printing surface, variable information with a large amount of information (two-dimensional code, etc.) can be printed with high definition and the amount of information transmitted to the end user The seller can display product information (history information on product production / distribution, product characteristic information, etc.) and campaign notification information (recruitment information, etc.) on the consumer side. Convenience can be improved by handling information (such as cooking information).

  Furthermore, since the variable information printing layer printed by the ink jet method is provided between the concealing layer and the heat-adhesive resin layer, printing due to the printing surface being damaged due to rubbing between packaging materials or contents. It is possible to prevent information damage and falsification of print information.

Explanatory sectional drawing for description which shows an example of the laminated structure of the packaging material which concerns on this invention. Sectional drawing for description which shows an example of the packaging bag similarly formed using the packaging material.

The present invention will be described in detail below with reference to the drawings.
FIG. 1 is an enlarged cross-sectional view for explaining an example of a laminated structure of a packaging material with printing information according to the present invention. A packaging material S includes a base material layer 1, an adhesive layer 2, a concealing layer 3, an adhesive layer 2 ′ from the outside. The heat-adhesive resin layer 4 is laminated in order, and has a laminated structure in which a printing layer 5 is provided on the inner surface of the base material layer 1, an ink receiving layer 6 and a variable information printing layer 7 are provided on the inner surface of the concealing layer 3 in this order. For example, it is composed of 12 μm biaxially stretched polyethylene terephthalate film / printing / adhesion / aluminum-deposited polyethylene terephthalate film 12 μm / ink receiving layer / variable information printing layer / adhesion / linear low density polyethylene 60 μm. The above laminated structure is an example and does not limit the present invention.

In the packaging material of the present invention, as a base material capable of printing such as general display, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, ethylene-propylene copolymer, etc. Polyolefin resin, ethylene-vinyl acetate resin, ionomer resin, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, polybutene resin, polymethylpentene resin, polyacrylic resin, polyacrylonitrile Resin, polyester resin, polyamide resin, polystyrene resin, polyvinyl chloride resin, polyvinylidene chloride resin, saponified ethylene-vinyl acetate copolymer, polycarbonate resin, fluorine resin, vinylon, cellophane, etc. Various resin materials mainly made of synthetic resin It can be used beam or sheet.
The film or sheet may be unstretched or stretched in a uniaxial direction or a biaxial direction. The thickness of the film or sheet is arbitrary depending on the problem of individual packaging, but is preferably about 10 to 200 μm.

The printed layer 5 provided on the base material layer 1 includes characters, patterns, figures, symbols, etc. for displaying contents, decoration, display of the best-before period, display of manufacturers, sellers, etc., and other displays. Arbitrary printing can be provided on the back surface or the front surface of the base material layer 1. In addition, since the printing layer 5 is protected by the base material layer 1 by providing the printing layer 5 on the back surface of the base material layer 1 as shown in FIG. 1, it is possible to prevent ink peeling due to rubbing from the surface. Moreover, when providing in the surface of the base material layer 1, providing a surface protective layer is generally performed further.
The printing layer 5 can be formed by a normal printing method such as gravure printing or offset printing, flexographic printing, letterpress printing, silk screen printing, or the like using a normal ink composition.

The concealing layer 3 is provided with a layer concealed by a method other than printing between the printing layer 5 and the variable information printing layer 7, and the printed portion of the variable information printing layer 7 is influenced by the characters and patterns of the printing layer 5. For example, a film in which a metal such as aluminum is vacuum-deposited on a plastic film to form a vapor-deposited film, a metal foil such as aluminum, and a white pigment mainly containing a polyolefin resin. A colored film can be preferably used, and the recognition accuracy by a reader can be improved.
As a metal forming the metal vapor deposition film, a metal such as aluminum (Al), chromium (Cr), silver (Ag), copper (Cu), tin (Sn), or the like can be used.
Examples of the white pigment used in the colored film include titanium oxide, zinc oxide, extender pigments such as aluminum hydroxide, magnesium carbonate, calcium carbonate, precipitated barium sulfate, silica, and talc.

The ink receiving layer 6 is formed by coating or the like in advance on the printing surface of the film forming the concealing layer 3 in order to receive ink printed by the ink jet printer. The material for forming the ink receiving layer 6 is polyester. Resins, polyamide resins, polyurethane resins, epoxy resins, phenol resins, (meth) acrylic resins, polyvinyl acetate resins, polyolefin resins such as polyethylene or polypropylene, or copolymers or modified resins thereof, cellulose resins A resin composition containing a resin, etc. as the main component of the vehicle can be used.
In addition, a porous material (white pigment, silica particles, etc.) having voids for receiving ink is dispersed in the material of the ink receiving layer 6. In particular, a barcode reader, a mobile phone, or the like is used for reading a printed portion. When a terminal is used, it is effective to disperse a white pigment, such as titanium oxide, calcium carbonate, barium sulfate, etc., in order to increase the contrast between the ink receiving layer and the printed portion and make it easy to recognize.
As a coating method, for example, a gravure coating method, a reverse roll coating method, a knife coating method, a kiss coating method, and the like can be applied, and the solid content coating amount is 0.1 g / m ^{2 in} a dry state. to 5 g / m ² can be preferably used, preferably from ^{0.5g / m 2 ~2g / m 2} .

The variable information printing layer 7 is a layer formed by printing using an ink jet type ink jet printer. The inkjet system is a system in which recording ink is ejected from a nozzle by the pressure of a fine piezoelectric element or the pressure of air generated by heating of a heating resistor element, and is adhered to an image receiving layer.
The variable information includes production date, processing date, expiry date, expiry date, variable information that is required to be displayed on the product and is in a visible state, production and distribution history information, product information, There is variable information that can be recognized by a reading terminal such as a barcode reader or mobile phone, such as a two-dimensional code that encodes a large amount of information, such as campaign notification information. Since it is necessary to print in the absence of ink, printing can be performed accurately and with good reproducibility by providing the ink receiving layer 6 as described above.
Further, since the variable information printing layer 7 is provided between the concealing layer 3 and the heat-adhesive resin layer 4, the printing surface is soiled by rubbing between the packaging materials and the contents, and the printing information is damaged. Or intentional falsification of the print information.

  Examples of the plastic film constituting the heat-adhesive resin layer 4 include polyolefin resins such as low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, ethylene-propylene copolymer, and ethylene. -Vinyl acetate resin, ionomer resin, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, polybutene resin, polymethylpentene resin, polyacrylic resin, polyacrylonitrile resin, polyester resin Mainly synthetic resins such as polyamide resin, polystyrene resin, polyvinyl chloride resin, polyvinylidene chloride resin, saponified ethylene-vinyl acetate copolymer, polycarbonate resin, fluorine resin, vinylon, cellophane, etc. Transparent of various resins It can be Irumu orutilizing sheet.

As a method of bonding the base material layer 1, the concealing layer 3 and the heat-adhesive resin layer 4, respectively, a dry lamination method in which lamination is performed via an adhesive for dry lamination, or an extrusion in which lamination is performed via a melt-extrusion adhesive resin. It can be performed by a lamination method or the like.
Examples of the adhesive for dry laminating include, for example, one-part or two-part curable or non-curable vinyl type, (meth) acrylic type, polyamide type, polyester type, polyether type, polyurethane type, epoxy type, rubber type, Other solvent-type, aqueous-type, or emulsion-type adhesives can be used. Examples of the coating method include direct gravure roll coating method, gravure roll coating method, kiss coating method, reverse roll coating method. It can be applied by the Fonten method, transfer roll coating method, and others.
Examples of the melt-extrusion resin include a low density polyethylene resin, a medium density polyethylene resin, a high density polyethylene resin, a linear low density polyethylene resin, and a copolymer resin of ethylene / α-olefin polymerized using a metallocene catalyst. , Ethylene / polypropylene copolymer resin, ethylene / vinyl acetate copolymer resin, ethylene / acrylic acid copolymer resin, ethylene / ethyl acrylate copolymer resin, ethylene / methacrylic acid copolymer resin, ethylene / methacrylic acid Graft polymerization or copolymerization of unsaturated carboxylic acid, unsaturated carboxylic acid, unsaturated carboxylic acid anhydride, ester monomer to methyl copolymer resin, ethylene / maleic acid copolymer resin, ionomer resin, polyolefin resin Grafted maleic anhydride to polyolefin resin The resin or the like can be used.

FIG. 2 is an explanatory cross-sectional view showing an example of a packaging bag formed using the packaging material having the above-described laminated structure, and the packaging bag P manufactured using the packaging material S according to the present invention includes the packaging material S. A pillow-type bag in which opposing edge portions are overlapped and thermally bonded to form a back seal portion, and both formed cylindrical ends are overlapped to form an end seal portion, and a base material layer After forming the printing layer 5 on the back surface of 1 using the normal ink composition, the concealing layer 3 is adhered via the adhesive layer 2, and the ink receiving layer 6 is applied to the back surface of the concealing layer 3. 6, the variable information printing layer 7 is printed using an ink jet printer device, and the thermal adhesive resin layer 4 is laminated on the concealing layer 3 via the adhesive layer 2 ′. 7 is protected by the heat-adhesive resin layer 4. In addition, in order to make the display of a figure clear, the said adhesive layers 2 and 2 'are abbreviate | omitted and drawn.
The above is an example of a packaging bag formed using the packaging material according to the present invention, and is not limited to this, and using the packaging material according to the present invention, the inner layer of the packaging material edge as described above. These can be folded with the surfaces facing each other, or the edges of the packaging material can be overlapped, and the peripheral edge of the outer periphery of the packaging material can be heat sealed to produce various packaging bags. Moreover, in this example of the packaging bag, the variable information printing layer 7 is printed on the inner surface of the concealing layer 3 and is not read from the outer surface of the packaging bag P, and the printed portion can be read by opening. However, as described above, information that must be displayed and displayed among variable information, campaign information, and information that should be able to be acquired by specifying the purchaser, such as “win” or “miss” In the laminated structure of the packaging material S, the position to be printed is appropriately determined.

  In addition, what is formed using the packaging material which concerns on this invention is not limited to the said packaging bag, For example, the label used for a cover material, a housing, a can or the above-mentioned bag body, unit goods It can also be used for a band or an outer package of an integrated product.

  The packaging material with print information of the present invention will be described with reference to the following examples.

In Example 1, a 12 μm-thick biaxially stretched polyethylene terephthalate film serving as a base material layer was printed on the back surface by a gravure printing method, and then a 12 μm-thick aluminum-deposited polyethylene terephthalate film was used as a concealing layer. Lamination is carried out through a laminating adhesive 3.0 g / m ² , and then a medium (transparent) ink is applied to a variable information printing portion by a gravure coating method to form an ink receiving layer, and an ink jet printer is used for the ink receiving layer After printing the QR code (registered trademark), 60 μm of low-density polyethylene is laminated on the entire surface through a urethane dry laminate adhesive 3.0 g / m ² .

In Example 2, a 12 μm-thick biaxially stretched polyethylene terephthalate film serving as a base material layer was printed on the back surface by a gravure printing method, and then a 12 μm thick aluminum-deposited polyethylene terephthalate film was used as a concealing layer to form a urethane-based dry Lamination is performed through a laminating adhesive 3.0 g / m ² , and then white ink is applied to a variable information printing portion by a gravure coating method to form an ink receiving layer, and an ink jet printer is used for the ink receiving layer. After printing (registered trademark), 60 μm of low density polyethylene is laminated on the entire surface through a urethane dry laminate adhesive of 3.0 g / m ² .

In Comparative Example 1, after printing on the back surface of a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm as a base material layer by a gravure printing method, black ink and then white ink were used as a concealing layer on a variable information printing portion. After applying a gravure coating method to form an ink receiving layer, and printing the QR code (registered trademark) using an ink jet printer on the ink receiving layer, it is reduced through a urethane dry laminate adhesive 3.0 g / m ^2. A polyethylene film having a density of 60 μm is laminated on the entire surface.

In Comparative Example 2, the back surface of a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm serving as a base material layer was subjected to a printing process by a gravure printing method, and then black ink and then white ink was used as a concealing layer on a variable information printing portion. 2. Apply to two layers (twice printing) by gravure coating method to make an ink receiving layer, print QR code (registered trademark) on the ink receiving layer using an ink jet printer, and then dry urethane-based laminate adhesive. This is a laminate of 60 μm of low density polyethylene over the entire surface through 0 g / m ² .

  For the films having the configurations of Examples 1 and 2 and Comparative Examples 1 and 2 obtained above, the printed QR code (registered trademark) is read using a mobile phone of a different company as reading terminals A and B. The evaluation results are shown in Table 1.

  As is clear from the reading evaluation results shown in Table 1 above, for the printing of the film comprising the configurations of Example 1 and Example 2, it can be read well by both reading terminals A and B, Aluminum-deposited polyethylene terephthalate film provided as a concealing layer sufficiently conceals the printed layer and reveals the contrast between the medium ink and white ink of the ink receiving layer and the variable information printing ink, so that reading is performed accurately. It was. On the other hand, in Comparative Examples 1 and 2, the color of the black ink in the hiding layer is not sufficiently hidden by the white ink, and it takes time to read the variable information printed on the white ink layer. No results.

P Packaging bag S Packaging material Q Contents 1 Substrate layer 2, 2 ′ Adhesive layer 3 Concealing layer 4 Thermal adhesive resin layer 5 Printing layer 6 Ink receiving layer 7 Variable information printing layer

Claims (6)

A base material layer provided with a printing layer on the back surface, a concealing layer, and a thermoadhesive resin layer as the innermost layer are sequentially laminated, and an ink receiving layer and an ink jet are provided on the surface of the concealing layer on the thermal adhesive resin layer side. The variable information printing layer printed by the printing method is sequentially formed, and a concealing layer formed over the entire surface is interposed between the printing layer and the variable information printing layer. Packaging material. The packaging material with printing information according to claim 1, wherein the concealing layer is made of a plastic film having a metal vapor-deposited film. The packaging material with print information according to claim 1, wherein the concealing layer is made of a metal foil. 2. The packaging material with printing information according to claim 1, wherein the concealing layer is made of a plastic film containing a white pigment. 5. The packaging material with print information according to claim 1, wherein the information printed on the variable information print layer is 80 dpi or more × 80 dpi or more of variable information. 6. The packaging material with printing information according to claim 1, wherein the information printed on the variable information printing layer is variable information that can be recognized by a reading terminal.

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