JP4289520B2 - Package - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a self-supporting package formed by processing a laminate having a reinforcing layer partially reinforced with a polymer film.
[0002]
[Prior art]
As a bag formed by processing a polymer film, for example, a self-supporting package represented by a gusset bag or the like is known. Conventionally, in order to impart self-supporting properties to a package, it has been necessary to bond a highly rigid film such as paper to the film constituting the package.
[0003]
[Problems to be solved by the invention]
However, when a package is formed using only a polymer film, sufficient self-supporting property may not be obtained to suit the use of the package. Moreover, when opaque materials, such as paper, are used, there exists a fault that the contents inside cannot be seen.
[0004]
An object of the present invention is to provide a package having a window having sufficient self-supporting property and allowing the contents to be seen.
[0005]
[Means for Solving the Problems]
The invention according to claim 1 includes a reinforcing region in which a reinforcing layer made of any one of paper, nonwoven fabric, and synthetic paper having a basis weight of 60 to 200 g / m ² is bonded to a polymer film that is a transparent film ; In a package formed by processing a laminate including a non-reinforcing region in which the reinforcing layer is not bonded to a molecular film, a window portion that is the non-reinforcing region is provided on at least one surface, and the non-reinforcing region A heat seal layer is formed on the surface of the polymer film, the laminate is bonded to each other through the heat seal layer, the reinforcing layer is disposed inside the polymer film, and is formed on the reinforcing layer. A package wherein the pattern is visible through the polymer film .
[0006]
According to this invention, since the laminated body reinforced by the reinforcing layer is processed and the window part which is a non-reinforcing region is provided, the packaging body which has sufficient self-supporting property and can see the contents can be obtained. Since the heat-sealing layer is provided on the non-reinforcing layer, the heat-sealing process can be easily performed. Moreover, by using a reinforcing layer made of any one of paper, nonwoven fabric, and synthetic paper having a basis weight of 60 to 200 g / m ² , the laminate can be reinforced by rigidity and sufficient self-supporting property can be given to the package. . Furthermore, by using a transparent film as the polymer film, the contents of the package can be seen through the non-reinforcing layer. Even when the reinforcing layer is disposed inside the polymer film, the polymer film The reinforcing layer can be seen through the film. Furthermore, a reinforcing layer is arranged inside the polymer film so that the pattern formed on the reinforcing layer can be seen through the polymer film. The degree of freedom can be increased.
[0019]
The invention described in claim 2 is the package according to claim 1 , wherein the package is a gusset bag.
[0020]
According to this invention, since the laminated body is reinforced by the reinforcing layer, sufficient self-supporting property can be imparted to the gusset bag.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the package according to the present invention will be described with reference to FIGS.
[0022]
FIG. 1 is a perspective view showing a package according to the present embodiment, and FIG. 1B shows a state viewed from the opposite side of FIG. The package A of the present embodiment is formed by processing the laminate 10 shown in FIGS. 2 and 3. On the surface, the reinforcing layer 2 is divided into a reinforcing region 2c, a non-reinforcing region 2b, and a non-reinforcing region 2a (window portion 2a).
[0023]
As shown to Fig.3 (a), the laminated body 10 is the transparent outer layer film 1 exposed to the outer side of a package body, and the reinforcement layer 2 for reinforcing the laminated body 10 arrange | positioned inside the outer layer film 1 And an intermediate layer 3 disposed on the inner side of the reinforcing layer 2 and imparting functionality such as gas barrier properties to the laminate 10 and a heat seal layer 4 exposed on the inner surface side of the package and functioning as a heat sealing adhesive layer. I have. The outer layer film 1 may have a heat sealing property so that the intermediate layer 3 and the heat sealing layer 4 are not required.
[0024]
Further, an adhesive layer 5 is provided between the outer layer film 1 and the reinforcing layer 2, an adhesive layer 6 is provided between the reinforcing layer 2 and the intermediate layer 3, and an adhesive is provided between the intermediate layer 3 and the heat seal layer 4. Each layer 7 is provided.
[0025]
As the outer layer film 1, for example, a stretched polypropylene film, a polyethylene terephthalate film, a nylon film, a polycarbonate film, or a cellophane film can be used.
[0026]
As the reinforcing layer 2, paper having a basis weight of about 60 to 200 g / m ² , non-woven paper, synthetic paper, or the like can be used. Synthetic paper is obtained by mixing a polymer material with a filler such as an inorganic or organic filler and molding the mixture into a sheet or film. The reinforcing layer 2 is used to reinforce the laminated body 10 so as to ensure the self-supporting property of the package obtained by molding the laminated body 10. The type, area, thickness, and the like of the reinforcing layer 2 can be appropriately selected as long as the self-supporting property of the package can be ensured.
[0027]
As the intermediate layer 3, for example, a stretched polypropylene film, a polyethylene terephthalate film, a nylon film, a polycarbonate film, a cellophane film, an aluminum foil, a metal thin film in which a metal thin film such as aluminum is formed on the polymer film surface, a polymer film surface A transparent thin film formed with a transparent metal oxide thin film or an ethylene vinyl alcohol copolymer film can be used.
[0028]
Examples of the heat seal layer 4 include polypropylene, linear low density polyethylene (LLDPE), low density polyethyleneethylene (LDPE), ionomer, ethylene-methyl acrylate copolymer (EMA), and polyethylene terephthalate (PET). Resin can be used.
[0029]
Examples of the adhesive layer 5 and the adhesive layer 6 include polyethylene, ethylene ethyl acrylate (EEA), ethylene-methyl acrylate copolymer (EMA), ethylene-acrylic acid copolymer (EAA), and ethylene-methacrylic acid copolymer. Resin such as coalescence (EMAA) or ionomer can be used.
[0030]
As shown in FIGS. 1 and 2, the reinforcing layer 2 is provided only on a part of the laminated body 10. A pattern is printed on the surface of the reinforcing layer 2 on the side in contact with the adhesive layer 5, and the pattern can be seen from the outside of the package through the transparent outer layer film 1 and the adhesive layer 5.
[0031]
As shown in FIG. 3B, the adhesive layer 5 and the adhesive layer 6 are continuous with each other in the region 2b where the reinforcing layer 2 is not provided and the portion that becomes the window portion 2a. If all the layers other than the reinforcing layer 2 are made of a transparent material, the contents of the package can be seen through this region where the reinforcing layer 2 is not provided.
[0032]
In the region where the reinforcing layer 2 is disposed, heat is hardly transmitted by the reinforcing layer 2, so that the heat sealing layer 4 cannot be sufficiently heated even if heat sealing is performed. For this reason, in this Embodiment, the area | region without the reinforcement layer 2 is provided in the peripheral part of the laminated body 10, and the laminated body 10 is adhere | attached through the heat seal layer 4 in this area | region, and the package is formed. .
[0033]
Hereinafter, the manufacturing method of the laminated body used for embodiment of the package of this invention is demonstrated.
[0034]
First, as shown in FIG. 4, a pattern is printed on a predetermined region 2c of the reinforcing layer 2, and a peeling varnish is applied to the non-reinforcing region 2b on the same surface. For example, a multicolor printing press may be used to continuously print the pattern and the release varnish in separate printing units. FIG. 4 shows a case where the reinforcing region 2c on which the pattern is printed is rectangular, and the peeling varnish is applied to the window 2a and the surrounding region 2b as the non-reinforcing region. Therefore, the surrounding non-reinforcing region 2b and the window 2a are discontinuous.
[0035]
As the ink layer of the pattern, it is preferable to select one having a strong adhesive force to the adhesive layer 5. As the peeling varnish, for example, nitrified cotton polyamide resin, silicone resin, polyethylene wax and the like can be used. For the peeling varnish, it is necessary to select a material having a higher adhesive force to the reinforcing layer 2 than to the adhesive force to the adhesive layer 5.
[0036]
Next, the outer layer film 1 and the reinforcing layer 2 are bonded together by extrusion lamination (extrusion coating) or lamination coating through the adhesive layer 5. As shown in FIG. 5, the reinforcing layer 2 is bonded to the outer layer film 1 via a surface on which a pattern is printed and a surface on which a release varnish is applied.
[0037]
Next, the reinforcing layer 2 is punched out into a shape surrounding the region 2b to which the peeling varnish is applied, for example, by a rotary die cutter. When punching out the reinforcing layer 2, as shown in FIG. 6, the outer layer film 1 is used as a support, and the punching blade 20 is inserted from the direction of the reinforcing layer 2 (downward in FIG. 6) to the middle of the adhesive layer 5. By cutting the adhesive layer 5 halfway with the punching blade 20 in this way, the reinforcing layer 2 can be reliably punched without damaging the outer layer film 1.
[0038]
Thus, the variation in the position where the punching blade 20 reaches can be absorbed using the thickness of the adhesive layer 5. Therefore, what is necessary is just to set the thickness of the contact bonding layer 5 according to the position accuracy of the punching blade 20 in the range accept | permitted on the performance requested | required of the laminated body 10. FIG.
[0039]
Next, as shown in FIG. 7, a heat-adhesive varnish is applied to the non-reinforcing region of the reinforcing layer 2, that is, the peripheral region 2b to be peeled off and the window portion 2a (halftone dot portion). This thermal adhesive varnish can be applied by printing. Examples of the heat-adhesive varnish include cellulose, polyvinyl acetate, polyacryl, polyolefin, polyester, polyamide, polyurethane, epoxy, amino resin, rubber, diene, and others. An adhesive such as a solvent type, emulsion type, hot melt type, or the like, which is the main component of the vehicle, can be used.
[0040]
Next, as shown in FIG. 8, the separate paper 8 is bonded to the surface of the reinforcing layer 2 on which the heat-adhesive varnish is applied by hot pressure. By this bonding, the reinforcing layer 2 and the separate paper 8 are bonded to each other at the portion where the heat-adhesive varnish is applied, that is, the non-reinforcing region 2b. As the separate paper 8, paper, processed paper, synthetic paper, plastic film, or the like can be used. The separate paper 8 has a necessary minimum thickness and is preferably in the range of 50 to 150 g / m ² from the viewpoint of cost reduction.
[0041]
Next, after the reinforcing layer 2 and the separate paper 8 are bonded together, as shown in FIG. 9, when the separate paper 8 is peeled off from the outer layer film 1, the reinforcing layer 2 is removed from a cut (cut surface) formed by punching. The non-reinforcing region 2b and the window portion 2a that have been cut and adhered to the separate paper 8 are separated and removed from the outer layer film 1, and the reinforcing region 2c remains adhered to the outer layer film 1. Therefore, by peeling off the separate paper 8 from the reinforcing layer 2, a composite film in which the reinforcing region 2c of the reinforcing layer 2 on which the pattern is printed is bonded to the outer layer film 1 is obtained. At this time, the peeling varnish of the non-reinforcing region 2b and the window portion 2a is removed from the outer layer film 1 together with the reinforcing region 2b of the reinforcing layer 2, and the adhesive layer 5 remains on the outer layer film 1.
[0042]
Finally, the intermediate layer 3 is bonded to the reinforcing layer 2 side of the composite film via the adhesive layer 6. In this case, for example, extrusion lamination or laminate coating can be used. Next, the heat seal layer 4 is formed on the surface of the intermediate layer 3 via the adhesive layer 7, and the laminate 10 shown in FIGS. 2 and 3 can be obtained. Also when the intermediate layer 3 and the heat seal layer 4 are bonded, extrusion lamination, laminate coating, or the like can be used.
[0043]
A self-supporting package can be produced by cutting and bending the laminated body 10 formed in this way and further performing heat sealing. For production of the package, for example, a conventional bag making machine or the like can be used. The package may be loaded with the contents simultaneously with the bag making.
[0044]
In this Embodiment, since the self-supporting property of a package is ensured by providing the reinforcement layer 2 in a part of the laminate 10 that forms the package, the selection of other film materials constituting the laminate 10 is possible. The range can be expanded. For example, it is possible to use a soft material for the other films constituting the laminate 10.
[0045]
In the present embodiment, a pattern is formed on the surface of the reinforcing layer 2 so that the pattern can be seen through the outer layer film 1, so that the reinforcing layer 2 functions effectively as a part of the packaging design. be able to.
[0046]
Examples of the shape of the window portion 2a that is a non-reinforcing region include a circular shape, a quadrangular shape, and a polygonal shape, and are not particularly limited. In the window portion 2 a, a pattern can be formed on the outer layer film 1 or the intermediate layer 3. In this case, since the alignment between the pattern of the reinforcing layer 2 and the pattern of the other member may be a problem, either one or both of the patterns may be used as an endless pattern so that such a problem does not occur. It is good also as (a pattern in which positioning does not matter).
[0047]
As shown in FIG. 10-a, the reinforcing layer 2 is not provided on the fold portion (corner portion) of the package, or the crease portion is not partially covered as shown in FIG. 10-b. It may be a reinforcing region. If the reinforcing layer 2 is removed from the fold portion, the laminate can be easily folded when the package is manufactured. For example, a conventional bag making machine can be used as it is. In addition, as shown in FIG. 11, the reinforcement layer 2 can be easily bent by inserting a perforation 21 into a portion corresponding to the fold of the package of the reinforcement layer 2. Such a perforation 21 can be formed simultaneously with the punching of the reinforcing layer 2 using, for example, a rotary die cutter. Half cut processing or crease processing may be performed instead of the perforation. In this way, when the reinforcing layer 2 is bent and disposed at the corners of the package, the strength of the entire package can be greatly increased, and thus the self-supporting property can be easily imparted to the package.
[0048]
The package according to the present invention has various types, for example, a side seal type, a two-side seal type, a three-side seal type, a four-side seal type, an envelope-attached seal type, a joint-attached seal (pillow) type, a creased seal type, a flat bottom seal type, It can be applied to a square bottom seal type, a standing pouch type, a gusset type package, and the like.
[0049]
【Example】
Examples of the package according to the present invention will be described below.
[0050]
First, a pattern is printed on the coated surface of single-sided coated paper (Mitsubishi Paper, one-art basis weight: 126 g / m ² ) by a multicolor gravure printing method, and a peeling varnish (Inktec K-S1 slip OP varnish is formed on portions other than the pattern. ) Was printed at the same time.
[0051]
Next, isocyanate is applied as an anchor coating agent to the corona-treated surface of a 20 μm-thick stretched polypropylene (OPP) film (Futamura Chemical FOR), and polyethylene imine as an anchor coating agent is applied to the printing surface (coated surface) of one-side coated paper. Applied. Then, the stretched polypropylene film and the anchor coat surfaces of the single-side coated paper were extruded and laminated using polyethylene resin as an adhesive layer. Thereby, the stretched polypropylene film and the single-side coated paper were bonded via a 30 μm polyethylene film.
[0052]
Next, using a stretched polypropylene film as a support, a rotary die cutter set to a cut depth of 133 μm is used to insert a punching blade from the non-printing surface (non-coating surface) side of the one-side coated paper, One side coated paper was cut at the window. The cut depth is set such that the cutting edge is positioned at the center of the polyethylene film as the adhesive layer. That is, the cut depth (133 μm) is set to a value obtained by adding ½ of the thickness of the polyethylene film (30 μm) to the thickness of the single-sided coated paper (118 μm), that is, 15 μm.
[0053]
Next, a heat-adhesive varnish (Dainippon Ink Bliss Pack A Kai-2) is applied to the portion (including the window) of the back surface of the single-sided coated paper obtained by laminating the single-sided coated paper and the polypropylene film. It was applied by gravure printing.
[0054]
Subsequently, high-quality paper (Oji Paper high-quality paper, basis weight: 95 g / m ² ) was passed as a separate paper on the back side of one-side coated paper partially coated with heat-adhesive varnish, and then heat-adhered. And pasted together.
[0055]
Furthermore, the separate paper and the stretched polypropylene film on which the single-sided coated paper was bonded were wound on separate rolls, whereby the separate paper was peeled off from the single-sided coated paper that was bonded to the stretched polypropylene film. As a result, unnecessary portions including the window portion other than the pattern of the single-side coated paper were separated and removed from the stretched polypropylene film together with the peeling varnish, and only the pattern portion of the single-sided coated paper remained on the stretched polypropylene film.
[0056]
Further, a composite film composed of a stretched polypropylene film and a pattern portion of single-sided coated paper is coated with a vapor-deposited film (Toyo Metallizing 1100: 12 μm thick) in which an aluminum vapor-deposited film is formed on the surface of polyethylene terephthalate film. Glued from the side. That is, by extruding and laminating with polyethylene resin (Mitsui Petroleum Mirason 11P), the single-side coated paper side of the composite film and the vapor-deposited surface of the vapor-deposited film are bonded to each other using a 15 μm-thick polyethylene film as the adhesive layer. did.
[0057]
Finally, isocyanate is applied as an anchor coating agent to the non-deposited surface of the vapor-deposited film, and this coated surface and a 20 μm-thick unstretched polypropylene film used as a heat seal layer are extruded and laminated with a polyethylene resin (Mitsui Sekiyu Mirason 11P). By doing so, it adhere | attached through the 15 micrometer-thick polyethylene film as an contact bonding layer.
[0058]
As for the layer structure of the multilayer film formed by the above steps, the stretched polypropylene (20 μm thickness) / polyethylene (30 μm thickness) / anchor coat / peeling varnish / pattern printing / coated paper is used for the pattern printed portion (the portion having the reinforcing layer). (Basis weight 126 g / m ² ) / polyethylene (15 μm thickness) / deposition film (12 μm thickness) / polyethylene (15 μm thickness) / unstretched polypropylene (20 μm thickness).
[0059]
The layer structure of the part without the pattern (the part without the reinforcing layer) is drawn polypropylene (20 μm thickness) / polyethylene (30 μm thickness) / polyethylene (15 μm thickness) / deposition film (12 μm thickness) / polyethylene (15 μm thickness) / non-stretched. Polypropylene (20 μm thick).
[0060]
When this multi-layer film is wound on a vertical gusset pillow machine (manufactured by Kawashima Seisakusho), the package is molded, the contents are filled into the package, and the package is sealed. A highly self-supporting gusset bag with a window that can be obtained was obtained.
[0061]
Moreover, when the winding of the above multilayer film is set in a bag making machine (manufactured by Seibu Seisakusho), the packaging body is molded and the packaging body is sealed. A gusset bag was obtained.
[0062]
【The invention's effect】
As described above, according to the present invention, a reinforcing region in which a reinforcing layer is bonded to a polymer film and a non-reinforcing region to which a reinforcing layer is not bonded are provided, and the non-reinforcing region is discontinuous. Therefore, the window part which can see the content can be provided, and the package which has sufficient self-supporting property can be obtained.
[Brief description of the drawings]
FIG. 1 is a diagram showing a first embodiment of a package according to the present invention.
FIG. 2 is a view showing a state where the package of FIG. 1 is developed.
3A is a cross-sectional view taken along the line AA in FIG. 2; FIG. 3B is a cross-sectional view taken along the line BB in FIG. 2;
4A and 4B are diagrams in which a pattern and a peeling varnish are printed on a reinforcing layer, in which FIG. 4A is a perspective view showing the reinforcing layer, and FIG. 4B is a plan view showing the reinforcing layer.
FIG. 5 is a cross-sectional view showing a state in which an outer layer film is bonded to a reinforcing layer.
6 is a cross-sectional view showing a state where a punching blade is inserted in the layer of FIG.
7A and 7B are diagrams in which a pattern and a peeling varnish are printed on the reinforcing layer, where FIG. 7A is a perspective view showing the reinforcing layer, and FIG. 7B is a plan view showing the reinforcing layer.
FIG. 8 is a diagram showing a process of attaching a separate paper to the surface of the reinforcing layer attached to the outer layer film.
FIG. 9 is a diagram showing a process of peeling a separate paper from a reinforcing layer bonded to an outer layer film.
FIG. 10 is a perspective view showing another package according to the present invention.
FIG. 11 is a view showing a reinforcing layer in which perforations are formed.
[Explanation of symbols]
A Package 1 Outer film 2 Reinforcement layer 2a Non-reinforcement area (window)
2b Unreinforced region (peripheral part)
2c Reinforcing region 3 Intermediate layer 4 Heat seal layer 5 Adhesive layer 6 Adhesive layer 7 Adhesive layer 8 Separate paper 10 Laminate 20 Extraction blade 21 Perforation

Claims (2)

A reinforcing region in which a reinforcing layer made of paper, nonwoven fabric or synthetic paper having a basis weight of 60 to 200 g / m ² is bonded to a polymer film which is a transparent film, and the reinforcing layer is bonded to the polymer film In a package formed by processing a laminate including a non-reinforcing region that is not,
A window portion that is the non-reinforcing region is provided on at least one surface, a heat seal layer is formed on the surface of the polymer film in the non-reinforcing region , and the laminate is bonded to each other through the heat seal layer, A packaging body , wherein the reinforcing layer is disposed inside a polymer film so that a pattern formed on the reinforcing layer can be seen through the polymer film .   The said package is a gusset bag, The package of Claim 1 characterized by the above-mentioned.

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