JP4899355B2 - Packaging material - Google Patents

Description

  The present invention relates to a packaging material for packaging conical foods such as chocolate confectionery and corn type ice cream, and in particular, a substantially fan-shaped blank plate is formed from the packaging material, and the substantially fan-shaped blank plate is shaped like an inverted cone. It is related with the packaging material used as the conical packaging container which winds around and overlaps one side edge part on the other side edge part, and joins it by a side edge junction part.

  Conventionally, various conical packaging bodies for filling and packaging generally conical foods such as chocolate confectionery and corn ice cream have been provided. Examples of the layer structure of the laminate constituting the packaging material used for these conical packaging bodies include those composed of a printing layer / aluminum foil layer / paper layer / thermoadhesive resin layer. The conical packaging body made of the packaging material is provided with a tearing knob at a substantially central portion in the height direction of the packaging body, and the lower half is held with one hand so that the apex side of the conical shape of the food is down. In the state, the upper half of the package is torn and removed with the other hand, and the upper half of the food is exposed to the outside so that it can be eaten (see, for example, Patent Document 1). Furthermore, in order to improve the puncture resistance of the laminate, a transparent substrate film is laminated on the surface layer, and a laminate comprising a transparent substrate film layer / printing layer / paper layer / aluminum foil layer / thermoadhesive resin layer can be mentioned. . The conical packaging body made of this packaging material is connected to a tear knob at one of the side edges and one partitioning means for partitioning the tear knob and has a substantially circular conical surface. Opening means such as the first perforation line reaching the paper layer from the transparent base film side provided in the direction is applied, and by pulling the tear tab part in the transverse direction with respect to the main body of the package, A conical package that can easily tear the upper half against the lower half and smoothly expose the upper half of the conical food contained in the package. Proposed in Japanese Patent Application No. 2004-102785.

  The packaging material used in these conical packaging bodies is made of aluminum foil or the like, has excellent moisture resistance, is easy to handle when eating, and further has a transparent film on the surface or surface of the packaging material. Since the back surface can be printed and the design property can be improved, it is widely used. However, it is necessary to impart shape-retaining properties to the above-mentioned conical package, and since the paper material having a high repulsive force and strong stiffness is used for the packaging material, the tip of the conical package is used. The seal part becomes easier to peel off, and the tendency for the peeling to become more pronounced as the cone angle of the conical package becomes sharper. As a result, there is a drawback that the seal part at the tip is opened and the food absorbs moisture or causes problems such as poor appearance. In particular, when the content is ice cream, there is a problem that when it melts, it becomes liquid and leaks and soils fingers and clothes. With respect to these problems, there is provided a packaging body for engraving a plurality of scars in a packaging material in an area portion corresponding to a seal portion constituting a conical tip portion to prevent peeling of the seal portion constituting the conical tip portion. It has been proposed (see, for example, Patent Document 2).

According to the technique disclosed in Patent Document 2, the occurrence of peeling of the seal portion at the tip of the conical package is significantly reduced and has a great effect, but is not sufficient. When using a packaging material consisting of a multi-layered laminate, the packaging material becomes stronger, the repulsive force becomes even higher, and the seal part at the tip of the conical package may peel off, It has become. In addition, the technique disclosed in Patent Document 2 requires a step of marking a scratch at a predetermined position of the fan-shaped blank plate, which inevitably increases costs.
Utility Model Registration No. 2597322 Japanese Patent Laid-Open No. 10-59469

  Therefore, the present invention forms a substantially fan-shaped blank plate, winds the substantially fan-shaped blank plate in an inverted conical shape, and superimposes one side edge on the other side edge to form a side end joint. In the conical package formed by joining, the seal part constituting the above-mentioned conical tip is prevented from peeling off, and is used for the conical package that does not cause moisture absorption, food leakage, poor appearance, etc. It is to provide a packaging material at a low cost.

In order to achieve the above object, according to the present invention, a substantially fan-shaped blank board is formed from a packaging material in which a polyolefin resin layer is laminated at least on a paper layer and an innermost layer. A fan-shaped blank plate is wound in an inverted conical shape, one side edge is overlapped on the other side edge and joined at the side edge joint, and after storing the contents, the upper edge is heated. It is a packaging material sealed by seal bonding, and a first region portion consisting of a belt-like region from an upper end portion to an apex in the one side edge portion of the fan-shaped blank plate, and the fan-shaped blank plate Only the polyolefin-based resin layer surface in the second region near the upper end of the other side edge is subjected to adhesion reinforcement treatment.

  The present invention according to claim 2 is characterized in that, in the packaging material according to claim 1, the adhesion reinforcing treatment applied to the surface of the polyolefin resin layer is a corona treatment.

  The present invention according to claim 3 is characterized in that, in the packaging material according to claim 1, the side end joint is joined by a hot melt adhesive.

The packaging material of the present invention is formed by forming a substantially fan-shaped blank board from a packaging material in which a polyolefin resin layer is laminated at least on a paper layer and an innermost layer, and winding the substantially fan-shaped blank board in an inverted conical shape. The side edge is overlapped on the other side edge and joined at the side edge joint, and after storing the contents, the upper edge is sealed by heat seal joining, A first region portion composed of a belt-like region from the upper end portion to the apex at the one side edge portion of the fan-shaped blank plate, and a second portion in the vicinity of the upper end portion at the other side edge portion of the fan-shaped blank plate. By applying an adhesion reinforcing treatment only to the polyolefin resin layer surface in the region of the area, peeling of the seal portion constituting the conical tip portion is prevented, so that moisture absorption of food, leakage of food, poor appearance, etc. do not occur. There is an effect.

  Furthermore, a laminate in which a transparent base film layer is laminated on the surface layer of the packaging material can be used, and vibration during transportation of a conical packaging body in which a conical food container is filled and packaged in a conical packaging container formed of the packaging material -Even if the tip of a conical packaging body collides with another conical packaging body by an impact, it has an effect of preventing the packaging material from being pierced and broken or generating pinholes. Further, by laminating a transparent substrate film layer on the surface, there is an effect that it has excellent gloss and is excellent in design.

  Moreover, corona treatment is equivalent to the side end joint as an adhesion reinforcement treatment of the polyolefin resin layer surface of the innermost layer, and by partially applying to the vicinity including the apex of the fan-shaped blank plate, the polyolefin resin layer and the adhesive In addition, the corona treatment can be performed in-line in the process of laminating each layer in the packaging material manufacturing process, and the sealing part constituting the conical tip can be prevented from peeling. The material can be provided at low cost.

  In addition, by using a hot melt adhesive for bonding the side end joint, there is an effect that a drying time is not required and productivity can be improved as compared with an emulsion adhesive or a solvent-based adhesive.

  The above-described present invention will be described in detail below with reference to the drawings. A few examples of the packaging material according to the present invention will be described with reference to the drawings. 1, FIG. 2, FIG. 3 and FIG. 4 are cross-sectional views showing some examples of laminates constituting the packaging material according to the present invention. FIG. 5 is a plan view of the packaging material shown in FIG. 1 printed with two rows of substantially fan-shaped blank plate patterns as viewed from the surface of the polyolefin resin layer. FIG. 6 is a plan view of the substantially fan-shaped blank plate formed from the packaging material shown in FIG. 1 as viewed from the surface of the polyolefin resin layer. 7 is a perspective view showing an example of a conical packaging container formed from the fan-shaped blank plate shown in FIG. 6, and FIG. 8 is a cone in which the conical contents are packed and packaged in the conical packaging container shown in FIG. It is a perspective view which shows an example of a shaped package.

  First, the packaging material A according to the present invention is composed of a laminate in which a transparent base film layer 1, an aluminum foil layer 2, a paper layer 3, and a polyolefin resin layer 4 are laminated in this order, as shown in FIG. As a lamination method, a known lamination method such as a method of laminating a thermoplastic resin such as polyolefin by hot melt extrusion using a T-die extruder, a method of laminating using a dry lamination method, a wet lamination method, or the like is appropriately used. Can be laminated. Furthermore, although not shown in figure, the side end joining which forms a substantially fan-shaped blank board from the wrapping material A, winds in a reverse cone shape, and overlaps and joins one side edge part on the other side edge part. In the portion, the surface of the polyolefin-based resin layer 4 in the region including the vicinity of the apex of the fan-shaped blank plate (hereinafter referred to as the tip seal region portion) is subjected to adhesion reinforcement processing. Furthermore, a desired printed pattern 5 such as a pattern, a character, a figure, a symbol, or the like is provided on the surface of the transparent base film layer 1 facing the aluminum foil layer 2.

  Next, as shown in FIG. 2, the packaging material B according to the present invention comprises a laminate in which a transparent base film layer 1, a paper layer 3, an aluminum foil layer 2, and a polyolefin resin layer 4 are laminated in this order. Yes, it is laminated using the same laminating method as that of the packaging material A, and although not shown in the drawing, an adhesion reinforcing treatment is applied to the tip seal region portion of the polyolefin resin layer 4 surface. Further, a desired printed pattern 5 such as a pattern, a character, a figure, a symbol, or the like is provided on the surface of the transparent base film layer 1 facing the paper layer 3.

  Further, as shown in FIG. 3, the packaging material C according to the present invention is composed of a laminate in which an aluminum foil layer 2, a paper layer 3, and a polyolefin resin layer 4 are laminated in order, and is similar to the packaging material A. Although laminated using a lamination method, although not shown, an adhesion reinforcing treatment is applied to the tip seal region portion on the surface of the polyolefin resin layer 4. Further, a desired printed pattern 5 such as a pattern, characters, figures, symbols, etc. is provided on the surface of the aluminum foil layer 2. If necessary, a primer layer is formed on the surface of the aluminum foil layer 2 and a printed pattern 5 is provided. On the printed pattern 5, the printing ink is protected or gloss is given to provide a design property or the like. An overprint layer for enhancing functionality can also be appropriately formed.

  Next, as shown in FIG. 4, the packaging material D according to the present invention is composed of a laminate in which a paper layer 3, an aluminum foil layer 2, and a polyolefin-based resin layer 4 are sequentially laminated. Although not shown in the figure, an adhesion reinforcing treatment is applied to the tip seal region portion of the polyolefin resin layer 4 surface. Further, a desired printed pattern 5 such as a pattern, characters, figures, symbols, etc. is provided on the surface of the paper layer 3. If necessary, an overprint layer can be appropriately formed on the surface of the printed pattern 5 for protecting the printing ink or imparting gloss or the like to enhance the design and functionality.

  The above illustrations are a few examples of the packaging material according to the present invention, and the present invention is not limited thereto, as long as the polyolefin resin layer is laminated at least on the paper layer and the innermost layer. Various plastic films, aluminum foils, and the like can be laminated on the surface layer and the intermediate layer.

  Next, a method of applying an adhesion reinforcing process to the tip seal region on the surface of the polyolefin-based resin layer 4 that is a point of the present invention will be described with reference to FIG. FIG. 5 shows a plan view of the packaging material A obtained by printing two rows of substantially fan-shaped blank plate patterns from the surface of the polyolefin resin layer 4. The dotted line of the substantially fan-shaped blank 10 shown in FIG. 5 indicates the planned punch line, and the solid line indicates the tip seal region 11. To illustrate the method for producing the packaging material A, first, the printed pattern 5 is first printed on the surface of the transparent base film layer 1 facing the aluminum foil layer 2 by a gravure printing method. After that, the aluminum foil layer 2 and the paper layer 3 are sequentially laminated by the dry lamination method, and the polyolefin resin layer 4 is laminated on the surface of the paper layer 3 by hot melt extrusion using a T-die extruder. Then, as shown in FIG. 5, at least the corona treatment in the direction in which the laminate web runs on the surface of the polyolefin-based resin layer 4 in the region including the tip seal region 11 (indicated by the diagonal lines in FIG. 5). The region indicated by the part) was applied to produce a laminate of the packaging material A. Corona treatment, ozone treatment, plasma treatment, sandblast treatment, undercoat treatment, and the like can be used as the adhesion reinforcing treatment method, but corona treatment is desirable from the viewpoint of productivity and simplicity. In addition, the adhesion reinforcement treatment may be performed in the next step after the laminated body is manufactured, or may be performed after the substantially fan-shaped blank plate is formed.

  Next, from the packaging material A that has been wound as described above, large cuts, small cuts, and punching are performed, and a blank plate E is manufactured as shown in FIG. In the drawing, 12 and 12 represent perforation lines for opening, and 13 represents a tearing knob. The tip seal region 11 is not hatched to indicate corona treatment in order to identify and understand the region, but the tip seal region 11 is also subjected to corona treatment. The opening perforation lines 12 and 12 are, for example, a rotary die cutter so as to reach the transparent substrate film layer 1 other than the innermost polyolefin resin layer 4, the aluminum foil layer 2, and the paper layer 3 in the step before the major break. It is formed using. The shape and number of perforations are appropriately selected depending on the size of the contents.

  The blank plate E manufactured from the packaging material A as described above is wound in an inverted conical shape with the polyolefin-based resin layer 4 side inward, and one side edge 14 is formed on the other side edge 15. A cone having an opening portion 17 formed by the upper edge portion as shown in FIG. The polyolefin-based resin layer is formed into a cylindrical packaging container F, and then filled with contents such as a cone-shaped chocolate confectionery or ice cream from the opening 17, and the openings 17 are brought together radially from three directions. By heat-bonding the four surfaces, an upper end seal portion 18 was formed to obtain a conical package G as shown in FIG. The surface of the polyolefin-based resin layer 4 corresponding to the side end joint portion 16 is subjected to corona treatment.

  By adopting the above configuration, the surface of the polyolefin-based resin layer 4 that forms the upper end seal portion 18 has no corona treatment region, so that the upper end seal portion 18 can be thermally bonded. When the content is ice cream, when the ice cream comes into contact with the corona-treated surface applied to the polyolefin resin layer 4, the corona-treated surface and the ice cream are brought into close contact with each other, and the packaging material of the conical package is opened. In some cases, the ice cream in close contact with the polyolefin-based resin layer 4 may be pulled to impair the shape of the ice cream, but the corona-treated surface does not come into contact with the ice cream by using the configuration of the present invention. The shape of the ice cream can be prevented from being broken.

  Next, the material which comprises the packaging material concerning this invention is demonstrated. Fine paper, coated paper, art paper, craft paper, etc. can be used for the paper layer, and soft, semi-rigid, hard or alloy foil can be used for the aluminum foil layer, but soft aluminum foil is suitable. In addition, the transparent base film layer is not particularly limited as long as it has printability and can be easily torn from notches and cuts, but a biaxially stretched polyester film or polypropylene is suitable. is there. The innermost layer is not particularly limited as long as it is a heat-bondable resin, but the contents are filled, the openings 17 are brought together radially from three directions, and the surfaces facing each other are formed. When heat bonding, hot tackiness is required, and since the odor inherent to the innermost film migrates and odors the contents, polyolefin resins such as polypropylene and polyethylene are suitable, Linear low density polyethylene is preferred.

  Next, as an adhesive for overlapping the side edge portions 14 and 15 of the substantially fan-shaped flank plate E formed from the packaging material of the present invention and joining them at the side edge joint portion 16, polyolefin, polyvinyl acetate, poly Solvent-type, emulsion-type, and hot-melt type adhesives mainly composed of acrylic, rubber, etc. can be used, but hot-melt adhesives with good productivity are desirable. The main component is suitably a polyolefin, and an ethylene vinyl acetate copolymer system is particularly preferable.

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

A printed pattern layer is provided on one surface of a biaxially oriented polypropylene film having a thickness of 20 μm and subjected to double-sided corona treatment using a urethane-based ink by a gravure printing method, and the printed layer and an aluminum foil having a thickness of 7 μm are urethane-based. The aluminum foil and high-quality paper (52.3 g / m ² ) were laminated by a dry lamination method through an adhesive, and the aluminum foil and fine paper (52.3 g / m ² ) were laminated by a dry lamination method. Thereafter, a low-density polyethylene is melt-extruded on the fine paper surface with a T-die extruder and a thickness of 35 μm is applied to produce a laminate, and as shown in FIG. 11 was registered, and a corona treatment was partially applied in a band shape to prepare a packaging material A. Then, using a rotary die cutter composed of a rotary die roll and an anvil roll having a cutting edge projecting at a predetermined position on the peripheral surface, a high-quality paper from the biaxially stretched polypropylene film side subjected to double-side corona treatment at a predetermined position of the laminate The perforation lines 12 and 12 for opening are formed, and after that, large cuts, small cuts and punching are performed to produce a blank plate E shown in FIG.

  The blank plate E produced above was wound in an inverted conical shape with the low-density polyethylene resin layer surface inside, and one side edge 14 in FIG. 6 was overlaid on the other side edge 15. An ethylene vinyl acetate copolymer hot melt adhesive is applied to the corona-treated portion of the low density polyethylene resin layer and bonded at the side end bonding portion 16 to produce the conical packaging container F shown in FIG. The top end seal 18 is filled by filling the cone 17 and then ice cream from the opening 17 of the cylindrical packaging container F, bringing the openings 17 radially from three directions, and thermally bonding the low-density polyethylene resin layer surfaces facing each other. And a conical package G as shown in FIG. 8 was obtained. The cone-shaped package G of ice cream produced above had no tip seal portion peeled off and opened at the cone tip seal portion, and the contents did not leak. While holding the lower half of the packaging body G with one hand so that the conical apex side is on the lower side of the conical packaging body G, the tear gripping portion 13 is picked with the other hand and pulled in a substantially lateral direction. When it was torn, the packaging material was torn and opened along the perforation line 12 for opening, and the shape of the ice cream was not broken, and the upper half could be exposed and eaten.

It is sectional drawing which shows an example of the laminated body which comprises the packaging material concerning this invention. It is sectional drawing which shows an example of the laminated body which comprises the packaging material concerning this invention. It is sectional drawing which shows an example of the laminated body which comprises the packaging material concerning this invention. It is sectional drawing which shows an example of the laminated body which comprises the packaging material concerning this invention. The top view which looked at the packaging material shown in FIG. 1 from the surface of the polyolefin-type resin layer is shown. The top view which looked at the substantially fan-shaped blank board formed from the packaging material shown in FIG. 1 from the surface of the polyolefin-type resin layer is shown. It is a perspective view which shows an example of the conical packaging container formed from the fan-shaped blank board shown in FIG. It is a perspective view which shows an example of the conical packaging body which filled and packaged the conical content in the conical packaging container shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transparent base film layer 2 Aluminum foil layer 3 Paper layer 4 Polyolefin-type resin layer 5 Print pattern 10 Fan-shaped blank 11 Tip seal area | region 12 Opening perforation line 13 Tear knob | pick part 14, 15 Side edge part 16 Side edge Joint part 17 Opening part 18 Upper end seal part A, B, C, D Packaging material E Blank plate F Conical packaging container G Conical packaging body

Claims (3)

A substantially fan-shaped blank plate is formed from a packaging material in which at least a paper layer and an innermost layer are laminated with a polyolefin-based resin layer, and the substantially fan-shaped blank plate is wound in an inverted conical shape so that one side edge is placed on the other side. It is a packaging material that is overlapped on the side edge and joined at the side edge joint, and after the contents are stored, the upper edge is sealed by heat seal joining, and the one of the fan-shaped blank plates The polyolefin system in the first region part consisting of a belt-like region from the upper end part to the apex in the side edge part, and the second region part near the upper end part in the other side edge part of the fan-shaped blank plate A packaging material characterized in that an adhesive reinforcement treatment is applied only to the resin layer surface. The packaging material according to claim 1, wherein the adhesion reinforcing treatment applied to the polyolefin resin layer surface is corona treatment. The packaging material according to claim 1, wherein the side end joint is joined with a hot-melt adhesive.

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