JP7490933B2 - Packaging - Google Patents

Description

The present invention relates to a packaging body.

Patent Document 1 discloses a package for storing contents such as stick-shaped snacks. This package includes a packaging bag for sealing the contents, and an outer box for storing the packaging bag. By opening the outer box and then the packaging bag, the contents can be taken out of the packaging bag and eaten while the outer box is standing upright.

Japanese Patent Application Laid-Open No. 11-079242

The above conventional packaging had the problem that the packaging bag and the outer box were separate components, and that the bag-making process and the box-making process were required, resulting in a large number of steps and high manufacturing costs. In addition, the packaging bag and the outer box had to be opened to remove the contents, resulting in poor convenience of the packaging.

In view of the above problems, the present invention aims to provide a package that can improve convenience while reducing manufacturing costs.

In order to achieve the above object, the present invention is characterized by comprising a laminated film having at least an outer adhesive layer having thermoplasticity, an inner adhesive layer having thermoplasticity, and a base layer disposed between the outer adhesive layer and the inner adhesive layer, a tubular body portion formed by bonding opposing ends of the laminated film to each other with the outer adhesive layer and the inner adhesive layer, and a bottom portion made of a thermoplastic resin molded member, the circumferential surface of which is thermally bonded to the inner adhesive layer to close the bottom surface of the body portion. With this configuration, the body portion and the bottom portion are formed integrally.

The present invention is also characterized in that in the packaging body configured as above, the bottom surface portion is formed from a resin whose main component is the same as that of the inner adhesive layer.

The present invention is also characterized in that in the packaging body having the above configuration, the inner adhesive layer is formed from a resin whose main component is the same as that of the outer adhesive layer.

The present invention is also characterized in that in the packaging body having the above configuration, the base layer is made of an inorganic substance-containing film containing 50% by weight or more of inorganic substance powder.

The present invention is also characterized in that in the packaging body having the above configuration, the base layer of the laminated film is made of a paper layer.

The present invention is also characterized in that in the packaging body having the above configuration, the laminated film has a resin film disposed between the base layer and the inner adhesive layer and having a metal vapor deposition film or an oxide vapor deposition film disposed on one surface.

The present invention is also characterized in that in the packaging body having the above configuration, the laminated film has a metal foil layer disposed between the base layer and the inner adhesive layer.

The present invention is also characterized in that in the packaging body having the above configuration, the laminated film has a barrier coat layer formed by coating the base layer with a barrier resin.

The present invention is also characterized in that in the packaging body having the above configuration, the bottom portion contains inorganic powder.

The present invention is also characterized in that in the packaging body having the above configuration, the body portion has easy tearing properties in the circumferential direction.

The present invention is also characterized in that in the packaging body having the above configuration, the body portion has an opening line that extends in the circumferential direction and is made by a non-penetrating cut that is cut to a predetermined depth in the thickness direction.

The present invention is also characterized in that in the packaging body having the above configuration, the body portion has an opening start portion that is arranged at a side end and is made of a non-through cut cut to a predetermined depth in the thickness direction.

The present invention is also characterized in that a recess is provided on the underside of the bottom portion in the packaging body configured as described above.

According to the present invention, a bottom portion made of a resin molded member is heat-bonded to a cylindrical body portion formed from a laminated film, sealing the bottom of the body portion. This allows the body portion and the bottom portion to be formed as a single unit, reducing manufacturing costs. In addition, convenience is improved because the contents can be easily removed by tearing the body portion. Therefore, a package can be provided that can reduce manufacturing costs while improving convenience.

FIG. 1 is a perspective view of a packaging body according to a first embodiment of the present invention; FIG. 1 is a top cross-sectional view of a packaging body according to a first embodiment of the present invention. FIG. 1 is a front cross-sectional view showing a lower portion of a packaging body according to a first embodiment of the present invention. FIG. 1 is a cross-sectional view showing a layer structure of a laminated film constituting a body portion of a packaging body according to a first embodiment of the present invention. FIG. 1 is an explanatory diagram illustrating a method of using the packaging body according to the first embodiment of the present invention. FIG. 11 is a perspective view of a packaging body according to a second embodiment of the present invention; FIG. 5 is a cross-sectional view showing the layer structure of a laminated film constituting a body portion of a packaging body according to a second embodiment of the present invention. FIG. 11 is a cross-sectional view showing the layer structure of a laminated film constituting a body part of a packaging body according to a third embodiment of the present invention. FIG. 13 is a cross-sectional view showing the layer structure of a laminated film constituting a body part of a packaging body according to a fourth embodiment of the present invention.

[First embodiment]
A first embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is a perspective view of a package 1, Fig. 2 is a top sectional view of the package 1, and Fig. 3 is a front sectional view showing the lower part of the package 1.

The package 1 can seal and store stick-shaped contents 30, such as baked goods. The package 1 is composed of a body 10 and a bottom 20, and can stand on its own by placing the bottom 20 on a desk or the like. The body 10 is hollow and tubular, and opposing ends of a rectangular laminated film 40 (see FIG. 4) are overlapped and thermally sealed at the back seal 10b that extends vertically. The bottom of the body 10 is thermally sealed at the outer periphery of the bottom 20, which is made of a resin molded member, and the bottom seal 10c (see FIG. 3). The top end of the body 10 is thermally sealed at the top seal 10a.

The bottom surface portion 20 is a resin molded member made of a thermoplastic resin such as polyethylene or polypropylene. The bottom surface portion 20 is formed in a disk shape and has an annular rib 21 that protrudes upward from the upper surface of the outer periphery. The rib 21 is disposed inside the outer periphery of the bottom surface portion 20. The lower end of the body portion 10 is disposed outside the rib 21.

In addition, a recess 20b is formed in the center of the underside of the bottom portion 20, facing the gate during molding. The recess 20b prevents a protrusion from being formed at the gate position of the bottom portion 20. This allows the package 1 to stand stably.

The bottom portion 20 is molded in a state where it is adhered to the body portion 10 by inserting the cylindrical body portion 10 into a mold and insert molding it. The bottom seal portion 10c is formed by thermally adhering the outer peripheral surface 21a of the rib 21 and the inner adhesive layer 43 (see Figure 4) by the heat during the insert molding. This allows the body portion 10 and the bottom portion 20 to be formed integrally, reducing manufacturing costs. The bottom portion 20 may also be molded by compression molding.

An opening start section 14 is provided at the side end of the body 10 above the contents 30. The opening start section 14 consists of a non-penetrating cut 14a (see Figure 4) made by cutting the laminated film 40 at a specified depth in the thickness direction. The laminated film 40 is also stretched after film production, and has linear tearability in the stretching direction. This stretching direction coincides with the circumferential direction of the body 10. As a result, the laminated film 40 has tearability in the circumferential direction of the body 10.

By taking advantage of the easy tearing properties of the laminated film 40, starting from the opening start point 14, the upper part of the body 10 can be easily torn in a straight line. This prevents the tearing direction from shifting downward, which could damage the contents 30.

The body 10 may be provided with an identification print that allows the opening start portion 14 to be visually identified from the surrounding area. This allows the user to easily open the body 10 starting from the opening start portion 14 by using the identification print as a guide.

Figure 4 is a cross-sectional view of the laminated film 40 that constitutes the body 10. The laminated film 40 is arranged, in order from the outer surface side, with an outer adhesive layer 41, a base material layer 42, and an inner adhesive layer 43. The outer adhesive layer 41 and the inner adhesive layer 43 have thermoplastic properties. The back seal portion 10b is formed by thermally bonding the outer adhesive layer 41 and the inner adhesive layer 43. The top seal portion 10a is formed by thermally bonding the inner adhesive layers 43 together.

The outer adhesive layer 41 and the inner adhesive layer 43 are formed from a thermoplastic resin such as polyethylene or polypropylene. By forming the outer adhesive layer 41 and the inner adhesive layer 43 from a resin having the same main component, the back seal portion 10b can be easily thermally bonded. In addition, by forming the inner adhesive layer 43 and the bottom portion 20 from a resin having the same main component, the body portion 10 and the bottom portion 20 can be easily thermally bonded together.

The outer surface of the outer adhesive layer 41 is corona-treated, and a printed layer (not shown) is formed at a predetermined position by gravure printing or offset printing. Note that no printed layer is formed on the back seal portion 10b, and the outer adhesive layer 41 and the inner adhesive layer 43 are firmly adhered. The printed layer may also be formed on the outer surface of the base layer 42.

The base layer 42 is made of an inorganic material blended film containing 50% or more by weight of inorganic material powder. The inorganic material powder has an average particle size of 0.5 to 15 μm. By adding inorganic material powder, the amount of petroleum-derived resin used can be reduced, thereby reducing the environmental impact of the packaging body 1.

The resin contained in the base layer 42 is preferably a polyolefin resin. There are no particular limitations on the polyolefin resin, and any known resin such as high density polyethylene (HDPE), low density polyethylene (LDPE), medium density polyethylene, linear low density polyethylene (L-LDPE), polypropylene, etc. may be selected. A mixture of two or more of these may also be used.

Examples of inorganic powders contained in the base layer 42 include calcium carbonate, calcium sulfate, barium sulfate, kaolin, mica, zinc oxide, dolomite, glass fiber, hollow glass microbeads, silica, chalk, talc, pigment, titanium dioxide, silicon dioxide, bentonite, clay, diatomaceous earth, etc. Also, a mixture of two or more of these may be used.

Calcium carbonate is preferred because it exists in large quantities in nature, can be obtained steadily at low cost, and has a small environmental impact.

The incision 14a is formed by laser processing, penetrating the outer adhesive layer 41 and cutting into a portion of the base layer 42 in the thickness direction. This allows the laminated film 40 to be easily torn starting from the opening start portion 14. The opening start portion 14 may be formed by the incision 14a made by a cutting blade, or may be formed by a group of scars consisting of multiple puncture holes.

Figure 5 is a diagram explaining how to use the package 1. The user overlaps the front and back of the body 10 and pulls it to the side, using the opening start part 14 (see Figure 1) as a guide. This tears the body 10 and opens an opening 13 at the top of the body 10. The user can remove the contents 30 from the opening 13 while the package 1 is standing on its own. The top 11, including the cut-off upper end seal part 10a, is discarded.

According to this embodiment, the bottom surface of the body 10 is sealed by heat-bonding the bottom surface 20 made of a resin molded member to the cylindrical body 10 formed by the laminated film 40. This allows the body 10 and the bottom surface 20 to form a package 1 that stands on its own and from which the stick-shaped contents can be removed. Therefore, the contents can be removed with a single opening action of tearing the body 10, improving the convenience of the package 1. In addition, the manufacturing cost of the package 1 can be reduced by eliminating the need for a conventional box-making process.

The bottom portion 20 is also formed from a resin whose main component is the same as that of the inner adhesive layer 43. This allows the bottom portion 20 and the body portion 10 to be easily thermally bonded together.

In addition, by forming the outer adhesive layer 41 and the inner adhesive layer 43 from the same resin as the main component, the back seal portion 10b can be easily thermally bonded.

The base layer 42 is made of an inorganic material-blended film containing 50% or more by weight of inorganic powder. This reduces the use of petroleum-derived resins and reduces the environmental impact of the packaging body 1. In addition, the amount of forest resources used can be reduced compared to when the base layer is formed from a paper layer, as in the embodiment described below.

It is more preferable that the bottom surface portion 20 contains inorganic powder. This can reduce the use of resin and further reduce the environmental impact of the packaging body 1.

In addition, the body 10 is easy to tear in the circumferential direction, so the front and back of the body 10 can be overlapped and easily torn in a straight line. Therefore, the package 1 can be easily opened in the horizontal direction without damaging the contents 30.

In addition, a recess 20b is provided on the underside of the bottom portion 20, and by facing the gate during molding to the recess 20b, it is possible to prevent a protrusion from being formed at the gate position of the bottom portion 20. This allows the package 1 to stand independently in a stable manner.

[Second embodiment]
FIG. 6 is a perspective view of the packaging body 1 according to the third embodiment, and FIG. 7 is a cross-sectional view showing the layer structure of the laminated film 40 constituting the packaging body 1. For convenience of explanation, the same reference numerals are used for the explanations similar to those of the first embodiment shown in the above-mentioned FIGS. 1 to 5. In the laminated film 40 of this embodiment, the base material layer 42 is made of a paper layer, and a resin film 45 having a deposition film 45a disposed on one surface between the base material layer 42 and the inner adhesive layer 43 is provided. The base material layer 42 and the resin film 45 are bonded via an adhesive layer 46. A printed layer (not shown) is formed on the outer end surface of the base material layer 42. The body 10 has a tear line 12 extending in the circumferential direction. The other parts are the same as those of the first embodiment.

The base layer 42 is made of paperboard having a basis weight of 50 to 300 g/m ^2. The adhesive layer 46 is made of polyethylene and ethylene methacrylic acid copolymer (EMAA).

The vapor deposition film 45a is disposed on one side of the resin film 45 and has gas barrier properties, preventing oxygen, water vapor, etc. from passing through the laminated film 40.

The resin film 45 is, for example, a polyethylene terephthalate (PET) film. The deposition film 45a is formed of a metal deposition film (e.g., an aluminum deposition film, etc.) or an inorganic oxide deposition film (e.g., a silica deposition film, an alumina deposition film, etc.). This provides the same effects as the first embodiment, improves the gas barrier properties of the laminated film 40, and prevents oxidation deterioration and loss of taste of the contents 30. The deposition film 45a may be disposed on the outer surface of the resin film 45.

The opening line 12 is formed by incisions 12a and scar groups 12b that are scattered or continuous in a linear manner extending in the circumferential direction. The incisions 12a and scar groups 12b are formed to a predetermined depth in the thickness direction of the laminated film 40 without penetrating it.

The incision 12a is formed by laser processing, with both ends being the outer end surface of the outer adhesive layer 41 and the middle in the thickness direction of the base material layer 42. The incision 12a may also be formed by a cutting blade. The scar group 12b is a set of minute puncture holes formed on the outer end surface of the resin film 45, and is aligned in a band shape. The scar group 12b is carved by performing scratch processing on the resin film 45 using a scar group forming roll equipped with a specified cutting blade.

The incision 12a and the group of scars 12b overlap in the thickness direction of the laminated film 40. This allows the laminated film 40 to be easily torn along the tear line 12. In this embodiment, the incision 12a does not penetrate the base material layer 42, but it may penetrate the base material layer 42 and reach a part of the adhesive layer 46.

In addition, in this embodiment, the vapor deposition film 45a is disposed on the inner surface side of the base material layer 42, but the vapor deposition film 45a may be disposed on the outer surface side of the base material layer 42. In this case, the scar group 12b is formed on the inner end surface of the resin film 45.

[Third embodiment]
Fig. 8 is a cross-sectional view showing the layer structure of the laminated film 40 constituting the package 1 according to the third embodiment. For convenience of explanation, the same reference numerals are used for the explanations similar to those of the second embodiment shown in Figs. 6 and 7 described above. The laminated film 40 of this embodiment has a metal foil layer 47 between the base material layer 42 and the inner adhesive layer 43. The base material layer 42 and the metal foil layer 47 are bonded via an adhesive layer 46. The tear line 12 is formed only by a cut 12a. The other parts are the same as those of the second embodiment.

The metal foil layer 47 is made of a metal foil such as aluminum, has gas barrier properties, and can prevent oxygen, water vapor, etc. from passing through the laminated film 40. This provides the same effect as the second embodiment.

The notch 12a is formed by laser processing, with both ends being the outer end surface of the outer adhesive layer 41 and the middle in the thickness direction of the base material layer 42. In this embodiment, the notch 12a does not penetrate the base material layer 42, but it may penetrate the base material layer 42 and reach a part of the adhesive layer 46.

[Fourth embodiment]
Fig. 9 is a cross-sectional view showing the layer structure of the laminated film 40 constituting the package 1 according to the fourth embodiment. For ease of explanation, the same reference numerals are used for the explanations similar to those of the third embodiment shown in Fig. 8 described above. In the laminated film 40 of this embodiment, a barrier coat layer 44 is formed on a base layer 42 instead of a metal foil layer 47. The other parts are similar to those of the third embodiment.

The barrier coat layer 44 is formed by coating a barrier resin on the base layer 42. The barrier coat layer 44 has gas barrier properties and can prevent oxygen, water vapor, etc. from passing through the laminated film 40.

For example, the barrier coat layer 44 is formed by coating a barrier resin such as polyvinyl alcohol (PVA) onto the base layer 42.

This provides the same effects as the third embodiment, while improving the gas barrier properties of the laminated film 40 and preventing oxidation deterioration and loss of taste of the contents 30.

In this embodiment, the barrier coat layer 44 is disposed on the inner surface side of the base layer 42, but the barrier coat layer 44 may also be disposed on the outer surface side of the base layer 42.

In addition, the cut 12a does not penetrate the base material layer 42, but may penetrate the base material layer 42 and reach a portion of the barrier coat layer 44.

The present invention is not limited to the above-mentioned embodiments, and various modifications are possible without departing from the spirit of the present invention. For example, the base layer 42 in the second to fourth embodiments is made of a paper layer, but the inorganic substance blended film in the first embodiment may be used for the base layer 42. This reduces the amount of forest resources used and further reduces the environmental impact of the packaging body 1.

LIST OF SYMBOLS 1 Package 10 Body 10a Top seal 10b Back seal 10c Bottom seal 11 Top 12 Opening line 12a Incision 12b Scars 13 Opening opening 14 Opening start 14a Incision 20 Bottom 21 Rib 21a Outer periphery 30 Contents 40 Laminated film 41 Outer adhesive layer 42 Base layer 43 Inner adhesive layer 44 Barrier coat layer 45 Resin film 45a Vapor deposition film 46 Adhesive layer 47 Metal foil layer

Claims (11)

A cylindrical body portion is formed by a laminated film having at least an outer adhesive layer having thermoplasticity, an inner adhesive layer having thermoplasticity, and a base layer disposed between the outer adhesive layer and the inner adhesive layer, and by bonding opposing ends of the laminated film to each other by the outer adhesive layer and the inner adhesive layer;
a bottom surface portion that is entirely made of a thermoplastic resin molded member and has a peripheral surface that is thermally bonded to the inner adhesive layer to close the bottom surface of the body portion;
The substrate layer is made of an inorganic substance-containing film containing 50% by weight or more of inorganic substance powder,
The body is configured such that the inside is sealed by thermally bonding the inner adhesive layers of the overlapping front and back surfaces at the upper end of the body, and the body can be opened by tearing the overlapping front and back surfaces in this sealed state. The package according to claim 1, characterized in that the laminated film has a resin film disposed between the base layer and the inner adhesive layer and having a metal vapor deposition film or an oxide vapor deposition film disposed on one side. The package according to claim 1, characterized in that the laminated film has a metal foil layer disposed between the base layer and the inner adhesive layer. The package according to claim 1, characterized in that the laminated film has a barrier coat layer formed by coating the base layer with a barrier resin. The package according to any one of claims 1 to 4, characterized in that the body portion extends in the circumferential direction and has easy tearing properties. The package according to any one of claims 1 to 5, characterized in that the body has a tear line that extends in the circumferential direction and is made of a non-penetrating cut that is cut to a predetermined depth in the thickness direction. The package according to any one of claims 1 to 5, characterized in that the body has an opening start portion arranged at a side end and formed of a non-through cut at a predetermined depth in the thickness direction. 8. The packaging body according to claim 1, wherein the bottom portion is formed from a resin having the same main component as the inner adhesive layer. 9. The packaging body according to claim 1, wherein the inner adhesive layer is formed from a resin having the same main component as that of the outer adhesive layer. The package according to any one of claims 1 to 9 , characterized in that the bottom portion contains an inorganic powder. The package according to any one of claims 1 to 10 , characterized in that a recess is provided on the lower surface of the bottom portion.

Images