JP2012071854A - Packaging material having printing information - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging material having printing information that is concealed from the exterior side of packaging bag to be visually unrecognizable and that can be visually recognized only from the interior side.SOLUTION: The packaging material includes a base material film layer, an intermediate layer, and a heat-adhesive resin layer that are laminated in decreasing order. A concealing ink layer is formed on a surface of the base material film layer that is closer to the intermediate layer to form a concealed area. A pattern printing layer is formed successively. A printing information layer is formed on a surface of the intermediate layer that is closer to the heat-adhesive resin layer in such a way that the printing information layer is created by an inkjet method to be within the concealing area. A camouflage layer is formed between the pattern printing layer and the intermediate layer, where the camouflage layer makes impossible visual recognizing printing information on the printing information layer from the base film layer side. Hence the printing information on the printing information layer can be visually recognized only from the heat-adhesive resin layer side.

Description

  The present invention relates to a packaging material used for a packaging bag for packaging contents such as food, and more specifically, printed information such as letters, symbols, designs, etc. expressing a lottery number is formed on the packaging material, and the purchaser of the product Can receive services and giveaways by visually recognizing the printed information, or can be suitably used for sales promotion by obtaining the qualification to receive the printed information from the outer side of the packaging bag. The present invention relates to a packaging material having printing information that is impossible and visible only from the inner surface side.

Conventionally, as a packaging bag that can be suitably used for sales promotion, for example, information such as letters, symbols, designs, etc. corresponding to “hit” and “out of” have been printed on the outer surface of the packaging material used for the packaging bag. Form a concealing release layer from above, or paste a concealing adhesive seal so that the information is not visible from the outside, scraping the concealing release layer, for example with a coin, There is known a configuration in which information such as “spot” and “out of contact” can be confirmed by peeling off the adhesive seal.
However, in the above method, the purchaser of the product usually cuts out the “around” part and sends it to the destination specified by the seller etc., which is troublesome and troublesome for the purchaser. There was a drawback. In recent years, with the remarkable spread of the Internet and mobile phones, application methods for sweepstakes using the Internet and mobile phones have been adopted.

For example, it consists of a transparent laminate with a base film layer and a thermoadhesive resin layer on the inner layer, and a concealing layer is partially provided with printing ink on the surface of the base film layer on the thermoadhesive resin layer side. Confirmed from the outside by forming a concealed area and providing a solid white print layer at least in the concealed area and forming an identification character string as print information with an inkjet printer on the white solid print layer of the concealed area A packaging material having printing information such as an identification character string that cannot be checked but can be confirmed from the inner surface side is known (for example, see Patent Document 1).
In addition, the outermost film layer, a transparent barrier layer, and a heat seal layer are sequentially laminated, and a concealing layer composed of an ink layer in order from the outermost film layer side to a part of the back surface of the outermost film layer, A packaging container with a concealing layer in which a white ink layer and a printing information layer printed by an inkjet recording method are provided and the heat seal layers are stacked and sealed so as to face each other is known (see, for example, Patent Document 2).

  However, in the inventions described in Patent Documents 1 and 2, when printing information is formed on the inner layer side of the base film layer or the transparent barrier layer side of the outermost film layer, when carefully observed from the outer surface side, There is a case in which a trace is printed on the outer surface of the base film layer or the outermost film layer by the ink jet method, and there is a problem that the concealability is not always sufficient.

JP 2004-18058 A JP 2004-67219 A

  Therefore, the present invention has been made to solve the above-mentioned problems, and the purpose of the present invention is to conceal the printing information from the outer surface side of the packaging bag and cannot be visually recognized, and from only the inner surface side. It is providing the packaging material provided with the printing information which can be visually recognized.

  In order to solve the above-mentioned problem, the packaging material having the printing information of the present invention according to claim 1 is formed by sequentially laminating a base film layer, an intermediate layer, and a heat-adhesive resin layer, and the base film A concealing region is formed with a concealing ink layer on the surface of the intermediate layer side of the layer, and a pattern printing layer is further formed in order, and is located in the concealing region on the surface of the intermediate layer on the heat-adhesive resin layer side Is a packaging material having a structure in which a print information layer formed by an inkjet method is formed, and the print information of the print information layer from the base film layer side between the pattern print layer and the intermediate layer A camouflage layer incapable of being visually recognized is formed, and the print information of the print information layer is visible only from the thermal adhesive resin layer side.

  According to a second aspect of the present invention, in the packaging material having the print information according to the first aspect, the camouflage layer is a lattice pattern.

  A third aspect of the present invention is the packaging material having the printing information according to the first or second aspect, wherein the intermediate layer is a biaxially stretched polyester film deposited with metal. is there.

  The packaging material provided with the printing information of the present invention comprises a base film layer, an intermediate layer, and a heat-adhesive resin layer laminated in order, and concealed with a concealing ink layer on the surface of the base film layer on the intermediate layer side. In addition to the formation of a region, a pattern print layer is formed in order, and a print information layer formed by an ink jet method is formed on the surface of the intermediate layer on the surface of the heat-adhesive resin layer so as to align with the concealed region. A packaging material having a structure in which a camouflage layer incapable of visually recognizing print information of the print information layer from the base film layer side is formed between the pattern print layer and the intermediate layer, By adopting a configuration in which the print information of the print information layer is visible only from the thermal adhesive resin layer side, the print information cannot be confirmed from the outer surface side of the packaging material, and is visible only from the inner surface side. , Other than the buyer With secrecy obtain excellent can not be seen in humans, there is an effect that it prevents unauthorized others. In particular, since the camouflage layer is formed, it is difficult to visually recognize that the trace of the print information layer formed on the intermediate layer by the inkjet method is relaxed on the outer surface of the base film layer. The effect which becomes. Further, the print information layer is laminated in a sandwich between the intermediate layer and the heat-adhesive resin layer, so that the print information layer does not fall off during the period from manufacture to sale and has an effect of preventing falsification. Furthermore, by adopting a configuration in which the print information layer is formed by the inkjet method, the print information can be easily generated as variable information such as identification character strings, symbols, and patterns made up of random numbers, and viewed from the outer surface side. In addition, traces when printed by the ink jet method are difficult to read, and an excellent concealing property is obtained.

  According to the second aspect of the present invention, the camouflage layer has a lattice-like pattern, so that in addition to the above effects, the printed trace is camouflaged when printed by an ink jet method, It becomes more difficult to see from the film layer side, and excellent concealment and camouflage properties are obtained.

  According to the third aspect of the present invention, since the intermediate layer is a biaxially stretched polyester film on which metal is vapor-deposited, the concealing property is further improved, and better confidentiality can be obtained.

One Embodiment of the packaging material provided with the printing information which concerns on this invention is shown, (A) is the top view seen from the outer surface side, (B) is the top view seen from the inner surface side. It is the XX sectional view taken on the line of FIG. It is an enlarged plan view which shows the example of a pattern of the camouflage layer of the packaging material provided with the printing information which concerns on this invention. It is a perspective view which shows one Example of the packaging bag produced using the packaging material shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a packaging material provided with printing information according to the present invention. (A) is a plan view seen from the outer surface side, (B) is a plan view seen from the inner surface side, and FIG. FIG. 3 is an enlarged plan view showing a pattern example of a camouflage layer of a packaging material provided with printing information according to the present invention, and FIG. 4 is a packaging produced using the packaging material shown in FIG. It is a perspective view which shows one Example of a bag. In the figure, reference numeral 1 is a packaging material having printing information, 2 is a packaging bag, 3 is a back seal part, 4 is an upper / lower seal part, 10 is a base film layer, 11 is a concealing ink layer, and 12 is a pattern print. 13 is a camouflage layer, 20 is an intermediate layer, 21 is a print information layer, 30 and 31 are adhesive layers, 40 is a heat-adhesive resin layer, I is print information, and A is a concealment area.

  As shown in FIGS. 1 and 2, a packaging material 1 having printing information according to an embodiment of the present invention is provided with a concealing ink layer 11 partially on one surface of a base film layer 10 to conceal an area A. The pattern printing layer 12 that covers at least the masking ink layer 11 is formed on the surface on which the masking ink layer 11 is provided. Furthermore, a camouflage layer 13 is formed in a region corresponding to the concealment region A from above the pattern printing layer 12. Further, as shown in FIG. 1 (b), for example, an identification character string is printed as the print information I by the ink jet method by aligning the position in the concealment area A with the surface of the intermediate layer 20 on the heat adhesive resin layer 40 side. Thus, the print information layer 21 is formed. Therefore, since the printing information layer 21 of the packaging material 1 having printing information is covered with the concealment area A and the camouflage layer 13 formed on the base film layer 10, as shown in FIG. The print information I cannot be visually recognized, and the print information I is visible through the thermal adhesive resin layer 40 only from the inner surface side as shown in FIG.

  FIG. 2 is a cross-sectional view taken along the line XX of FIG. As shown in FIG. 2, the packaging material 1 having the printing information of the present invention has a configuration in which the base film layer 10, the intermediate layer 20, and the heat-adhesive resin layer 40 are sequentially laminated via the adhesive layers 30 and 31. Become. Then, a masking area A is formed by the masking ink layer 11 on the surface of the base film layer 10 on the intermediate layer 20 side, and the pattern printing layer 12 that covers at least the masking ink layer 11 on the entire surface on which the masking ink layer 11 is provided. Are formed in order. Further, a camouflage layer 13 is formed in a region corresponding to the concealment region A on the surface of the picture print layer 12 on the side of the intermediate layer 20, and is laminated with the intermediate layer 20 via the adhesive layer 30. On the surface of the intermediate layer 20 on the heat-adhesive resin layer 40 side, a print information layer 21 is formed which is formed by an ink jet method in alignment with the concealment region A formed in the base film layer 10. Further, the intermediate layer 20 is laminated via the surface on which the print information layer 21 is formed, the thermal adhesive resin layer 40 and the adhesive layer 31.

  The camouflage layer 13 serves to prevent the trace from being generated on the outer surface side of the base film layer 10 by relaxing the printing pressure together with the intermediate layer 20 when printing by the ink jet method, and the base film even if the trace is generated. It plays the role of giving camouflage so that the traces cannot be read from the layer 10 side. In the present invention, the ink jet system is a system in which printing 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 attached to a substrate to be printed. To tell. That is, in the present invention, when the ink jet method is adopted, it is discovered that a printing trace is generated up to the outer surface of the base film layer 10 due to the printing pressure. The formation of the camouflage layer 13 prevents the occurrence of traces on the outer surface side of the base film layer 10, or it has been found that the printed information is difficult to read even if traces occur. It is.

  It is important for the camouflage layer 13 to have camouflage properties so that the printed information is difficult to read from the traces generated when printing by the ink jet method, and the camouflage layer 13 should have a pattern rather than a solid pattern. It is preferable because camouflage can be obtained. A preferred pattern example of the camouflage layer 13 is shown in FIG. As shown in FIG. 3, a lattice pattern, a polka dot pattern, a polka dot pattern, a stripe pattern, and the like are preferable patterns, but these patterns are intended to obtain camouflage and do not depart from the gist of the present application. It is not limited to. In addition, the camouflage layer 13 is formed by part-coating the region corresponding to the concealment region A. However, the camouflage layer 13 may be formed over the entire surface including the region other than the concealment region A as long as it covers at least the concealment region A. However, when it is formed on the entire surface, it is important to make the camouflage layer colorless.

Also, on the surface of the base film layer 10 facing the print information layer 21 of the design print layer 12, a white solid print layer is laminated at least in the concealed area A so that the print information can be easily seen from the inner surface side. You can also. Furthermore, an ink receiving layer for enabling high-definition printing can be provided on the surface of the intermediate layer 20 on which the print information layer 21 is formed. The ink receiving layer can be formed using an ink containing a pigment such as titanium oxide, silica, calcium carbonate, barium sulfate, etc., using a polyester-based, polyamide-based, polyurethane-based, epoxy-based or acrylic-based resin as a binder.
Further, the print information is not limited to the identification character string, and characters, symbols, designs, and the like can be used.

  FIG. 4 is a perspective view showing an embodiment of a packaging bag produced using the packaging material 1 having the printing information shown in FIG. A pillow-type packaging bag sealed by seal portions 4 and 4, and this packaging bag 2 is a concealing ink layer 11 directly from the outer surface side, and indirectly a pattern printing layer 12 and a camouflage layer 13. Alternatively, the print information I of the print information layer 21 cannot be confirmed by the contents (not shown) or the like, and by opening the packaging bag 2, as shown in FIG. The print information I of the print information layer 21 formed in the region corresponding to A and the camouflage layer 13 can be viewed through the thermal adhesive resin layer 40 from the inner surface side. In addition, since the print information layer 21 is provided between the intermediate layer 20 and the heat-adhesive resin layer 40, the print information layer 21 does not fall off during manufacture and sales, and has an effect of preventing falsification. Even at the time of sale, it cannot be confirmed by unauthorized acts other than authorized buyers.

  The base film layer 10 is a layer on the outer surface side of the packaging material 1 provided with printing information, and a synthetic resin film having excellent properties in mechanical, physical, chemical, etc. can be used. For example, a uniaxially or biaxially stretched film made of a resin such as polyester, polyamide, or polypropylene, or a metal oxide such as silicon oxide or aluminum oxide on at least one surface thereof, or polyvinylidene chloride, What provided the transparent water vapor | steam and oxygen gas barrier layers, such as polyvinyl alcohol, can be used. The intermediate layer 20 may be the same synthetic resin film as the base film layer 10, a film obtained by vapor-depositing a metal such as aluminum on these synthetic resin films, or paper, nonwoven fabric, aluminum foil, or the like. it can. The thickness of the synthetic resin film used for the intermediate layer is usually 6 μm to 40 μm.

  The heat-adhesive resin layer 40 may be a layer formed from a heat-adhesive resin that can be melted by heat and welded to each other. For example, low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear ( (Linear) Low density polyethylene, polypropylene, ethylene-α olefin copolymer, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, ionomer resin, ethylene-acrylic acid copolymer Further, a resin such as an olefin resin such as an ethylene-methyl acrylate copolymer or an ethylene-methacrylic acid copolymer can be formed by an extrusion method, or these resins can be formed into a film.

  The adhesive layer 30 is a dry laminating method using a two-component dry laminating adhesive composed of a main component and a curing agent such as polyester polyol-isocyanate, polyether polyol-isocyanate, polyurethane-isocyanate, and the like, solventless type Forming by a lamination method such as a non-solvent adhesive laminating method using an adhesive is preferable because the adhesive strength between the camouflage layer 13 and the intermediate layer is increased.

  As the adhesive layer 31, a two-component type composed of a main component and a curing agent such as an extrusion method in which a polyolefin-based resin is hot-melt extruded as an adhesive layer, a polyester polyol-isocyanate-based, a polyether polyol-isocyanate-based, a polyurethane-isocyanate-based, etc. It can be formed by a known lamination method such as a dry laminating method using an adhesive for dry laminating as an adhesive layer, or a non-solvent adhesive laminating method using a solventless adhesive as an adhesive layer.

  Further, as the concealing ink layer 11 and the pattern printing layer 12, an appropriate vehicle is selected according to the type of film used for the base film layer 10, and an ink is formed by adding a pigment, a solvent, various auxiliary agents, and the like. Then, it can be formed by printing by a known printing method such as a gravure printing method.

The camouflage layer 13 takes into consideration the type of ink used for the concealing ink layer 11 and the pattern printing layer 12, and selects a vehicle that has good adhesion to these inks, and adds a solvent, various auxiliary agents, etc. to the ink to make it into an ink. It can be formed by printing by using a known printing method such as a gravure printing method. The thickness of the camouflage layer 13 is about 0.1 μm to 5 μm. In addition, you may add extender pigments, such as a coloring pigment, an alumina white, a silica, a calcium carbonate, barium sulfate, magnesium carbonate.
Further, when the camouflage layer is formed on the entire surface, colorless and transparent, colorless and translucent ink is used so that the design print layer 12 does not feel uncomfortable in design.

  The print information layer 21 can be formed by printing using a dye type or pigment type ink for an ink jet printer using a known ink jet printer. In the embodiment, the print information I of the print information layer 21 is exemplified by Arabic numerals, but may be alphabets, symbols, characters, designs, or a mixture of these.

  The manufacturing method of the packaging material provided with the printing information according to the present invention is first formed by sequentially printing the concealing ink layer 11, the pattern printing layer 12, and the camouflage layer 13 on the base film layer 10 by, for example, a gravure printing method. Is done. Thereafter, the surface of the camouflage layer 13 of the base film layer 10 and the intermediate layer 20 are laminated by a dry laminating method. Thus, the printing information is printed in the area corresponding to the concealment area A by the ink jet method in synchronism with the concealment ink layer 11 and the camouflage layer 13 on the side of the intermediate layer 20 that is laminated with the thermal adhesive resin layer 40. The information layer 21 is formed. Then, the surface of the intermediate layer 20 on the print information layer 21 side and the heat-adhesive resin layer 40 are laminated by a dry lamination method, a non-solvent adhesive lamination method, or an extrusion lamination method. The print information layer 21 can also be provided inline by mounting an ink jet printer on a dry laminator or an extrusion laminator.

  Next, the present invention will be described in more detail with reference to the following examples.

Using a biaxially stretched polyethylene terephthalate film (PET) having a single-sided corona treatment with a thickness of 12 μm as a base film layer, a concealing ink layer and a phototube that become a partial concealment region at a predetermined position on the corona-treated surface by a gravure printing method The mark is printed and formed, and a pattern printing layer covering the entire concealment region is formed thereon, and a camouflage layer is printed and formed on the entire surface of the pattern printing layer with the lattice pattern shown in FIG. .
<Camouflage layer pattern>
Pattern: Lattice pattern Lattice width (applied part): 0.5 mm Lattice pitch: 0.5 mm
The masking ink layer uses black ink with urethane resin as the binder, the camouflage layer uses colorless medium with urethane resin as the binder, and the pattern printing layer uses ink with urethane resin as the binder. It was. Next, using a biaxially stretched polyethylene terephthalate film (VMPET) deposited on a single-sided aluminum with a thickness of 12 μm as an intermediate layer, a polyester polyol-isocyanate-based two-component reactive dry laminating adhesive is produced by a dry laminating method (DL). Laminate the PET camouflage layer surface and the VMPET aluminum vapor deposition surface through the adhesive layer used, and then print in the concealed area in synchronism with the concealing ink layer on the PET surface of VMPET (the surface opposite to the aluminum vapor deposition surface). An information layer was formed, and an intermediate laminate having a configuration of <PET 12 μm / masking ink layer / picture printing layer / camouflage layer / DL / VMPET 12 μm / printing information layer> was produced.
In addition, as printing information, a dot of 0.1 mmφ was printed by an inkjet method, and a number was printed at a pitch of 0.1 mm to form a printing information layer.

  Next, the print information surface of the intermediate laminate and the heat-adhesive resin layer are bonded through an adhesive layer formed by using a polyester polyol-isocyanate two-component reactive dry laminate adhesive by a dry laminating method (DL). Laminated. An unstretched polypropylene film (CPP) having a thickness of 30 μm was used for the heat-adhesive resin layer. Thereafter, aging (temperature 35 ° C., 2 days) is performed, and the adhesive is reacted and cured. The packaging material provided with was produced.

  Example 1 was repeated except that the camouflage layer pattern was all solid.

[Comparative Example 1]
A packaging material in which the camouflage layer of Example 1 was omitted was produced.

  When the packaging material provided with the printing information obtained in Example 1 is viewed from the outer surface (PET) side, light is irregularly reflected by the lattice pattern of the camouflage layer, and it is impossible to confirm the printed trace. The printed information was difficult to read from the outside. Printing information was easily visible from the inner surface side (CPP side). When the packaging material of Example 2 was viewed from the outer surface (PET) side, printed traces were slightly felt, but even when observed at different angles, it was difficult to interpret the printed information from the outer surface. . The packaging material of Comparative Example 1 showed a print trace on the outer surface, and a portion of the print information could be inferred when observed at different angles.

DESCRIPTION OF SYMBOLS 1 Packaging material provided with printing information layer 2 Packaging bag 3 Back seal part 4 Upper / lower end seal part 10 Base film layer 11 Concealing ink layer 12 Picture print layer 13 Camouflage layer 20 Intermediate layer 21 Print information layer 30, 31 Adhesive layer 40 Thermal Adhesive Resin Layer I Printing Information A Hiding Area

Claims (3)

A base film layer, an intermediate layer, and a heat-adhesive resin layer are laminated in order, and a concealing region is formed with a concealing ink layer on the surface of the base film layer on the intermediate layer side, and a pattern printing layer further A packaging material having a structure in which a print information layer formed by an ink jet method is formed on the surface of the intermediate layer on the surface of the intermediate layer, which is formed in order, in the concealment region. A camouflage layer incapable of visually recognizing the print information of the print information layer from the base film layer side is formed between the pattern print layer and the intermediate layer, and the print information of the print information layer is the thermal adhesiveness A packaging material provided with printing information, which is visible only from the resin layer side. The packaging material with printing information according to claim 1, wherein the camouflage layer is a lattice pattern. The packaging material provided with printing information according to claim 1 or 2, wherein the intermediate layer is a biaxially stretched polyester film deposited with metal.

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