JP2009107678A - Packaging material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging material such as a packaging bag formed of a transparent laminated body which makes it impossible to tamper information such as a number, a key for a prize application and to illegally see and confirm information such as a number, a key for a prize application except a proper purchaser. <P>SOLUTION: This packaging material comprises a transparent laminated body having a base film layer 10 and an inner heat adhesive resin layer 40. A printing ink concealing layer 21 is formed on the layer 40 side of the layer 10 for forming a concealed area. A printing layer 23 sequentially having a dot pattern printing layer 25, a picture printing layer 22 and a white plain printing layer 23 is formed on the concealed area. An identification character string 24 is ink-jet printed on the layer 23 in the concealed area. The layer 40 is formed on the layer 10 through an adhesive layer 30. In this case, the string 24 is concealed by the layer 21, the layer 25 and the layer 22. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a packaging material used for packaging contents such as foods. More specifically, the present invention can be used for sales promotion by providing a prize as a lottery number of a prize, etc. The present invention relates to a packaging material provided with an identification character string having visibility and visibility from the inner surface side.

  Conventionally, for the purpose of promoting sales of contents such as food, means for giving a prize function to a packaging material for packaging food or the like has been used. As this means, for example, printing information such as a hit on the surface of the packaging material, concealment printing for concealing on the surface layer, or sticking an adhesive seal, the purchaser prints the information on the packaging material A method of confirming information such as a hit or not and applying for a sweepstakes by scraping off a shield printing portion applied to the portion or peeling off a seal is performed.

  Usually, the packaging materials used for the above purposes are paper boxes formed from paperboard, etc., formed from plastic film, etc., pillow type, three-side seal type, four-side seal type, gusset type, standing type, etc. Covers such as bags, blister packs, cup-shaped containers, etc. are used. In general, foods and other contents are sold individually wrapped in the packaging material. However, the whole packaging material or only the display information part such as “winning” is cut off, and one or a predetermined number of sheets is sent to the destination for application.

  The above method cannot be applied for a sweepstakes unless it is sent to the address specified by the seller, etc., and only the person who sent the packaging material or a part of the packaging material to the specified address becomes the applicant for the prize, This is a method that can prevent third parties from applying for prizes by unauthorized means.

  However, since this type of conventional prize application method is a packaging material in which the contents of food or the like are individually packaged, depending on the type of the product or packaging material, it may be necessary to clean the packaging material. When the number of sheets is necessary, it is necessary to stock (save), or when it is necessary to cut out, there is a demerit that the purchaser is relatively cumbersome, troublesome, and avoided.

  In recent years, due to the rapid spread of the Internet and mobile phones, a prize application method using the Internet and mobile phones has also been adopted. For example, a number serving as a key for applying for a prize is assigned to an identification character string (for example, a 12-digit random number) The identification character string is printed on the surface of the packaging material for wrapping the above-mentioned food, etc., and concealed printing is performed on the surface layer, or an adhesive seal is applied, and the purchaser It is a method of confirming information such as identification character strings by scraping off the shield printing part applied to the information printing part of the material or peeling off the seal, but the conventional purchaser is the packaging material Or, unlike the method of sending a part of the packaging material to the specified destination, for example, the identification character string can be obtained by unauthorized means such as scraping off the shield printing part or removing the seal without purchasing the product. Of information to obtain, it is possible to apply, such can not be performed an illegal act packaging is desired.

By providing a concealing layer on the inner surface of the film layer of the packaging material, information such as an identification character string cannot be visually recognized from the surface of the packaging body, and the purchaser can visually recognize the inner surface side of the packaging body by opening after purchasing the product. A packaging material that can confirm and obtain information such as an identification character string and apply is proposed (see Patent Document 1).
Also, when packaging confidential documents and other information in an envelope format, the envelope paper has a grain pattern or grain pattern on the envelope paper to prevent the internal information from being seen through and the confidentiality cannot be maintained. Irregular pattern or a pattern with many black circles arranged, so-called “halftone dot” regular pattern is seen through the envelope paper surface side, and the image is covered with internal information such as letters There has been proposed a confidential document wrapping paper that is deteriorated so as to reduce the visibility from the front side and maintain the confidentiality of internal information (see Patent Document 2).
JP 2004-18058 A Japanese Patent Laid-Open No. 06-268878

However, in the packaging material of Patent Document 1, the identification character string formed by the ink jet printer on the inner surface side penetrates the pigment type ink used for the print layer by the ink used by the ink jet printer, and the print portion and its There is a difference in the periphery, and it may be visually recognized from the surface side of the packaging material. Information such as an identification character string can be completely concealed, and is not visible from the surface side of the packaging body. Packaging materials such as packaging bags are required.
In addition, although it has been shown that a transparent material such as stretched polypropylene is used as the material for the confidential document wrapping paper in Patent Document 2, the information description portion that is essentially a confidential document is the inner surface of the wrapping paper, and is concealed. The pattern is applied to the outer surface of the wrapping paper, and it is not assumed that the printing portion and the pattern portion for concealment are both the inner surface and the printing method is different, as in the above packaging material. When the outer surface-side concealing pattern of the transparent material is scraped off by unauthorized means, there is a concern that the transparent material may be visually recognized from the front surface side of the packaging paper.

  Therefore, the object of the present invention is to solve the above-mentioned problem, and it is impossible to falsify information such as a number as a key for applying for a prize during the period from manufacture to sale. In addition, it is formed from a transparent laminated body such as a plastic film in which information such as a number that is a key for applying for a prize can not be viewed by unauthorized persons other than an authorized purchaser at the time of sale, etc. It is to provide a packaging material such as a pillow type, a three-side seal type, a four-side seal type, a gusset type, and a standing type packaging bag.

  In order to solve the above problems, the invention of claim 1 is composed of a transparent laminate including a base film layer and a thermoadhesive resin layer on the inner layer, and the base film layer is on the thermoadhesive resin layer side. A masking layer is formed on the surface by using a printing ink to form a masking area, and a dot pattern printing layer, a pattern printing layer, and a white solid printing layer are sequentially provided on the masking area to form a printing layer. An identification character string is printed on an ink jet printer on the white solid printing layer, and the thermal adhesive resin layer is provided on the base film layer on which the printing layer and the identification character string are printed via an adhesive layer. In the packaging material, the identification character string is concealed by the concealing layer, the halftone dot print layer, and the picture print layer.

  The invention according to claim 2 is the packaging material according to claim 1, wherein the halftone dot print layer provided on the masking layer is provided with ink of a similar color to the masking layer.

  A third aspect of the present invention is the packaging material according to the first or second aspect, wherein the halftone dot print layer constituting the print layer is formed by an irregular pattern.

  The packaging material of the present invention is formed from a transparent laminate such as a plastic film, and is a packaging material such as a pillow type, a three-side seal type, a four-side seal type, a gusset type, and a standing type packaging bag. In the meantime, it is not possible to falsify information such as the number that will be the key to the application for the sweepstakes. There is an excellent effect that information such as the number cannot be visually recognized.

  Since the packaging material of the present invention is provided with a halftone dot print layer on the inner surface of the base film layer, the smoothness of the surface of the packaging body, that is, the surface of the base film layer is not impaired, and for visual recognition from the front surface side. This is because the printed identification character string is mixed into a halftone dot pattern by the halftone dot print layer applied on the outermost surface side of the printed layer formed on the inner surface side of the base film layer, so that the concealed area of the packaging material is the highest. It is possible to further reduce the visibility of information such as an identification character string formed on the inner layer surface on the surface side of the packaging material and maintain confidentiality.

  In the packaging material of the present invention, the irregular pattern printing layer or the halftone dot pattern printing layer applied on the masking layer is applied with the same color ink as the masking layer, so that only the pattern is present. It does not stand out and can improve the concealment effect.

  In addition, when the halftone dot print layer provided on the inner surface of the base film layer is formed with an irregular pattern such as a grain pattern, a grain pattern, etc., the regular pattern generated when the halftone pattern layer is provided. Therefore, it is difficult to generate a state in which a printed portion to be concealed is easily recognized as an “irregular pattern”, and a reduction in visibility can be maintained.

  The present invention will be described in detail below with reference to the drawings. FIG. 1 is a plan view showing an embodiment of a packaging material according to the present invention. FIG. 2 is an enlarged back view of the main part of FIG. 3 is a cross-sectional view taken along line XX in FIG. 4 is a partially transparent perspective view showing one embodiment of a packaging bag produced using the packaging material shown in FIG. In the figure, 1 is a packaging material, 1 'is a packaging bag, 2 is a back seal portion, 3 is an upper / lower end seal portion, 10 is a base film layer, 20 is a printing layer, 21 is a concealing layer, and 22 is a pattern printing layer. , 23 is a white solid print layer, 24 is an identification character string, 25 is a halftone dot print layer, 30 is an adhesive layer, 40 is a heat-adhesive resin layer, and A is a hidden area.

  FIG. 1 is a plan view showing an embodiment of a packaging material according to the present invention, FIG. 2 is an enlarged rear view of the main part of FIG. 1, and FIG. 3 is a sectional view taken along line XX of FIG. Thus, the packaging material 1 is partially provided with a concealing layer 21 with black ink on one surface of the base film layer 10 to form a concealing region A, and is the same as the concealing layer 21 as shown in FIG. The concealment region in which the print layer 20 in which the pattern print layer 22 and the white solid print layer 23 are sequentially provided is formed on the entire surface on which the halftone dot print layer 25 and the concealment layer 21 are provided, and the concealment layer 21 is provided. An identification character string 24 is formed on the white solid printing layer 23 of A using an ink jet printer using black ink, and a thermal adhesive resin layer 40 is provided on the surface thereof via an adhesive layer 30.

  FIG. 4 is a partially transparent perspective view showing an embodiment of a packaging bag produced using the packaging material shown in FIG. 1, and the packaging bag 1 ′ includes a back seal portion 2 and upper / lower end seal portions 3 which are attached to each other. 3, the packaging bag 1 ′ is directly covered with the concealing layer 21 from the front side, and indirectly with the halftone dot printed layer 25, the pattern. The identification character string 24 is configured not to be recognized by the printing layer 22, the white solid printing layer 23, or the contents (not shown), and the concealing layer 21 is provided for the first time by opening the packaging bag 1 '. The identification character string 24 printed on the white solid print layer 23 in the concealment area A can be confirmed. Further, since the identification character string 24 is provided between the base film layer 10 and the thermoadhesive resin layer 40, it cannot be falsified during the period from manufacture to sale. Even at the time of sale, it cannot be confirmed by unauthorized acts other than authorized buyers.

FIG. 5 is an explanatory diagram of a state in which the visibility changes depending on the density of the halftone dot pattern of the halftone dot pattern printing layer 25 provided on the masking layer 21, and the character size and typeface of the printed identification character string The visibility changes depending on the size of the dots (dots) themselves and the coarse density of the dots (dots) constituting the halftone dot print layer 25.
FIG. 5A is a partially enlarged view of the identification character string 24 made up of Arabic numerals printed by the ink jet printer shown in FIG. 2. As shown in the figure, Arabic numerals and alphabet characters used in the ink jet printer are , A character composed of a series of dots (dots).
FIG. 5B shows a state in which a halftone dot pattern of dots (dots) of approximately the same size as the dots (dots) used for the printed Arabic numerals is used. ) And printed Arabic numeral dots (dots) overlap and are misunderstood. Also in this case, when the density of dots (points) is sparse, that is, when the gap between regularly arranged dots (points) is large, the printed characters may be visible, and the printed characters This also varies depending on the size of the dot, the size of the dot (point) used, the pitch, and the like.
FIG. 5C shows a state in which a regularly arranged halftone dot pattern using dots (dots) having a diameter approximately half that of the dots (dots) used in the printed Arabic numerals is used. FIG. 5 shows a state in which printed Arabic numeral dots (dots) can be visually recognized in fine dots (dots) of a halftone dot pattern. Although not shown, conversely, in the case of a regular dot pattern of large dots (dots), the printed numbers may be visible from the blank space between the dots (dots), and the printed identification characters It is necessary to consider the character size and typeface of the columns, the size of the dots (dots) constituting the halftone dot pattern layer 25, and the sparse density.

  The halftone dot print layer used for concealment shown in the embodiment can be formed by a grain pattern, a grain pattern, or other irregular patterns although illustration is omitted. As a result, it is possible to eliminate the situation where a print portion to be hidden in the regular pattern of halftone dots, which is generated when a regularly arranged halftone pattern is provided, is easily recognized as an "irregular pattern". As with the halftone dot print layer, it is necessary to consider the character size and typeface of the printed identification character string, the shape of the irregular pattern, the size of the individual pattern, and the sparse density. It is preferable to use selectively including the halftone dot print layer.

  The base film layer 10 is a layer that becomes a base material of the packaging material 1 and can be a synthetic resin film having excellent properties in mechanical, physical, chemical, and the like. Biaxially stretched films made of resin such as polyamide and polypropylene, such as biaxially stretched polypropylene films, biaxially stretched polyethylene terephthalate films, biaxially stretched polyethylene naphthalate films, etc. Alternatively, a biaxially stretched polyamide film such as nylon 6, nylon 66, MXD6 (polymetaxylylene adipamide) or the like can be suitably used. Moreover, what provided transparent water vapor | steam and oxygen gas barrier layers, such as a silicon oxide, aluminum oxide, or a polyvinylidene chloride, can be used for at least one of these surfaces. The thickness of the film may be a thickness that can be held to the minimum necessary with respect to the strength and rigidity as the base material layer, and is selected and determined in consideration of cost and the like.

  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, and may be appropriately selected and used depending on the physical properties required for the packaging material. 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 In addition to olefinic resins such as polymers, ethylene-vinyl alcohol copolymers, ionomer resins, ethylene-acrylic acid copolymers, ethylene-methyl acrylate copolymers, ethylene-methacrylic acid copolymers, polyesters, polyamides, poly Resin consisting of one or more resins such as acrylonitrile or a film of these , And the like monolayer or those multilayered.

  Further, as the printing layer 20, a vehicle (a medium that uniformly disperses and develops the color developing agent-pigment and adheres to the surface of the object) is appropriately selected depending on the type of the synthetic resin film used for the base film layer 10. It can be formed by printing with a well-known printing method such as a gravure printing method using a pigment, a solvent, various auxiliary agents, etc. added thereto to make an ink.

  The identification character string 24 is 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 identification character string 24 is an Arabic numeral. However, the present invention is not limited to this, but may be an alphabet or a mixture thereof.

  Further, as the adhesive layer 30, the surface of the base film layer 10 on which the printed layer 20 and the identification character string 24 are formed and the thermal adhesive resin layer 40 are laminated by a known dry lamination method. For example, a well-known adhesive layer such as polyurethane is used, and the surface of the base film layer 10 on which the print layer 20 and the identification character string 24 are formed and the heat-adhesive resin layer 40 are T. An anchor agent layer and a resin layer such as polyethylene which has been melt-extruded by heating are used when the layers are laminated by a well-known sandwich lamination method using a die extruder. Further, the thermal adhesive resin layer 40 is formed of a resin such as polyethylene melt-extruded using a T-die extruder on the surface of the base film layer 10 on which the printing layer 20 and the identification character string 24 are formed. The anchor agent layer hits this. The adhesive layer and the anchor agent layer may be formed of an organic solvent-based adhesive and an anchor agent. However, an identification character string printed with an ink jet printer is formed with an aqueous adhesive and an aqueous anchor agent. Is preferred because there is no fear of bleeding.

  In addition, the packaging material 1 according to the present invention has the above-described base film layer 10 as required depending on the physical properties required of the packaging material 1 between the base film layer 10 and the thermal adhesive resin layer 40. The mechanical synthetic toughness, bending resistance of the packaging material 1 by providing the plain synthetic resin film described in the above, the synthetic resin film having a water vapor or oxygen gas barrier layer, or the saponified ethylene-acetic acid copolymer, Functions such as puncture resistance, impact resistance, cold resistance, heat resistance, chemical resistance, and barrier properties can be imparted or improved.

  Moreover, the packaging material 1 which concerns on this invention decided to provide the concealment layer 21 separately from the pattern printing layer 22 with the black ink in embodiment. Although illustration is omitted, for example, when there is a concealing solid pattern having an area (area) enough to print the identification character string 24 on the pattern printing layer 22, this solid pattern is used as the concealing layer. And may be printed using ink for an inkjet printer having the same color as the solid pattern. By comprising in this way, it becomes unnecessary to provide the concealing layer 21 which looks strange compared to the pattern printing layer 22, and only the concealing layer is not conspicuous in the entire packaging material design, and the packaging material having excellent design properties can do.

  Moreover, although the packaging material 1 which concerns on this invention was represented with the pillow type package in the Example of FIG. 4, it is not restricted to this, Although illustration is abbreviate | omitted, a three-side seal type, a four-side seal type, a gusset type, It can be applied to well-known packaging bags such as a standing type, and can also be applied to lid materials such as blister packs and cup-shaped containers.

The top view which shows one Example of the packaging material which concerns on this invention. Similarly the principal part enlarged back view of FIG. XX sectional drawing of FIG. 1 similarly. The partially transparent perspective view which shows one Example of the packaging bag similarly produced using the packaging material shown in FIG. Explanatory drawing of the visibility change of the identification character string by the change of the halftone dot pattern which comprises a halftone dot print layer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Packaging material 1 'Packaging bag 2 Back seal part 3 Upper and lower seal part 10 Base film layer 20 Print layer 21 Concealment layer 22 Picture print layer 23 White solid print layer 24 Identification character string 25 Halftone pattern print layer 30 Adhesive layer 40 Thermal Adhesive Resin Layer A Hiding Area

Claims (3)

Consists of a transparent laminate with a base film layer and a thermoadhesive resin layer on the inner layer, and a concealment region is formed by providing a concealment layer with printing ink on the surface of the base film layer on the thermoadhesive resin layer side. In addition, a halftone pattern printing layer, a pattern printing layer, and a white solid printing layer are sequentially provided on the concealment area to form a printing layer, and an identification character string is formed on the white solid printing layer in the concealment area by an inkjet printer. Is a packaging material in which the thermal adhesive resin layer is provided via an adhesive layer on a base film layer on which the printed layer and the identification character string are printed, and the identification character string is formed on the masking layer and the concealing layer. A packaging material which is concealed by a halftone dot print layer and the picture print layer. The packaging material according to claim 1, wherein the halftone dot print layer provided on the masking layer is provided with an ink of a similar color to the masking layer. The packaging material according to claim 1, wherein the halftone dot print layer constituting the print layer is formed by an irregular pattern.

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