JP6981145B2 - Flexible packaging material - Google Patents

Description

The present invention relates to a flexible packaging material that forms a packaging bag, and the printed image drawn on the flexible packaging material is three-dimensional and can obtain a cosmetic effect.

For printed matter that can be visually viewed three-dimensionally, set the print pitch with respect to the microlens sheet, focus on the distance between the left and right eyes, shift the visible figure, and use a lenticular lens, etc., with the eyes. A method of visualizing by obtaining different images depending on the viewing position has been adopted.
Since such a stereoscopic image uses a hard and thick lenticular lens or the like, the cost is high and the use is limited.

To solve such a problem, Patent Document 1 provides an optically observable variable pixel layer formed at a predetermined pixel pitch value in a part of an outer surface of a rectangular parallelepiped or cubic-shaped packaging container, and is provided on the variable pixel layer. We propose a packaging container with a lens in which microlens sheets having a lens array formed with a lens pitch value that matches the image pitch value are overlapped and mounted so as to be slidable.

The lens sheet used for this packaging container with a lens is made by applying a transparent ultraviolet curable resin having low wettability on the entire surface of the liquid-repellent layer with a layer thickness equal to or higher than that of the liquid-repellent layer. The resin is formed so that it rises in a convex shape to form a lens array layer, which is then irradiated with ultraviolet rays to cure it and integrated with the lens base material layer. It can be made into a thin microlens sheet, but it is hard. Therefore, it could only be used on a flat plate surface.

Further, in Patent Document 2, it is a package using a decorative body in which a lens having a constant pitch is formed by a transparent varnish on a printed substrate, and the lens is placed at an arbitrary position on the package and is higher than the lens. It is a package characterized by having a convex shape.
It is proposed to create a lens and a highly convex shape by applying a gloss varnish coating to a printed matter containing a pattern with a liquid-repellent varnish, utilizing the incompatibility with the liquid-repellent varnish.

The microlens sheet used for this package with a lens is manufactured by patterning an incompatible liquid-repellent varnish with a gloss varnish coating, and as shown in FIG. 6, a printed portion provided on the reflective layer is provided as a lens. A sheet having a structure provided below the sheet is created and used as a package.
This package can be formed on a sheet even if the base material is somewhat soft, but it is a box-shaped package having a flat surface like a paper container, and is optics that can be visually recognized three-dimensionally. The effect was fixed and could not be used for soft flexible packaging materials.

Japanese Unexamined Patent Publication No. 2011-11785 Japanese Patent No. 5786509

Therefore, it is a film that can be used as a flexible packaging material with high flexibility, and it is three-dimensional and its optical visual image changes according to changes in the curvature of the film, resulting in an aesthetic effect. It is an object of the present invention to obtain a flexible packaging material having a certain printed surface.

The present invention is configured in the order of at least a metal vapor-deposited film having a metal-deposited layer on the substrate side on one surface of a substrate made of paper or a resin film, a transparent resin film, and a net-like lens. It is a flexible packaging material
The metal-deposited film is composed of a transparent resin film and a metal-deposited layer.
Having a gap formed between the metal-deposited film and the transparent resin film via a partially arranged adhesive portion, and a printing portion printed with mesh dots on the metal-deposited film side of the gap. It is a characteristic flexible packaging material.

The flexible packaging material of the present invention forms an image on a soft film, and even a slight change in the shape of the film causes the image to be moire or locally enlarged or reduced, which is a special case. It is a flexible packaging material that has a high aesthetic effect with movement by changing the image.

It is a vertical sectional view schematically showing the structure of the flexible packaging material in 1st Embodiment of this invention. It is a figure which represented typically the cross section in the printing part of the flexible packaging material in 1st Embodiment of this invention. It is a figure which shows an example of the optical path of light in the 1st Embodiment of this invention schematically in the vertical sectional view. In the first embodiment of the present invention, the change in the optical path of light in a state where the transparent resin layer is deformed and the distance between the lens and the printing portion is deviated from the focal length is schematically shown in a vertical sectional view. be. It is a figure which represented typically the cross section in the printing part of the flexible packaging material in 2nd Embodiment of this invention. It is a figure which shows an example of the optical path of light in the conventional form example schematically in the vertical sectional view.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a vertical sectional view schematically showing the structure of the flexible packaging material 1 in the first embodiment of the present invention.
The flexible packaging material 1 of the present invention has at least a base material 2 made of paper or a resin film from the inside, a thin-film film 3 having a metal-deposited layer 31, a transparent resin film 4, and a mesh-like lens 5 in this order. It is configured.
Further, it is preferable to provide a sealant layer 21 to be fused to form a packaging bag inside the base material 2.
In the vapor-deposited film 3 having the metal-deposited layer 31, the metal-deposited layer 31 is directed toward the base material 2, and the adhesive portion 6 is partially arranged between the film surface side of the metal-deposited film 3 and the transparent resin film 4. A gap 7 is formed through the film.
The gap 7 has a printing unit 8 printed in halftone dots.

FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1 schematically showing a cross-sectional view of the flexible packaging material 1 in the first embodiment of the present invention, passing through the printed portion 8.
A gap 7 is formed while the four sides are surrounded by the adhesive portion 6, and the printing portion 8 is formed in the gap 7 in a halftone dot pattern.
The halftone dots of the printing unit 8 are composed of at least two halftone dots for the left and right directions.
For this reason, the printing unit 8 combines two originals, one for the left and one for the right, and prints at the same time using the combined originals in which the two originals are combined at the same time as possible.
The image printing of the printing unit 8 is performed by printing using halftone dots such as gravure printing, flexographic printing, and offset printing.
The lens pitch 51 (see FIG. 1) of the halftone dot-shaped lens 5 is set between the halftone dots for the left eye among the two halftone dots of the printing unit printed by the halftone dots. It is formed equal to the pitch or the pitch between the halftone dots for the right eye.

FIG. 3 is a diagram schematically showing an example of an optical path of light in the first embodiment of the present invention in a vertical cross-sectional view.
The distance between the halftone dot printed portion 8 and the halftone dot lens 5 is set close to the focal length of the halftone dot lens. Then, when external light is incident, the back surface of the metal vapor deposition layer 31 becomes a mirror-like reflecting surface, where the incident light 91 is reflected, and the light is incident on the printing unit 8 from the back surface.
The light diffusely reflected by the printing unit 8 placed at the focal length of the lens 5 is refracted by the lens 5, and the transmitted light passing through the left printing unit 81 becomes parallel to become the reflected light 92 for the left eye and is incident on the left eye. .. Similarly, the transmitted light passing through the right printing unit 82 becomes parallel to become the reflected light 93 for the right eye, and is incident on the right eye. Then, the light that enters each eye is comprehensively recognized by the brain.

FIG. 4 is an example of the first embodiment of the present invention, in which the transparent resin layer 4 is deformed to change the gap, so that the distance between lens printing between the halftone dot-shaped lens 5 and the printing unit 8 is 52 (FIG. 1). (See) is slightly changed from the focal length, and is a diagram schematically showing the change in the optical path of light in that state in a vertical sectional view.
When the distance between the netted lens 5 and the printing unit 8 deviates from the focal length, the light diffusely reflected by the printing unit 8 is refracted by the lens 5, but the transmitted light passing through the printing unit 81 is not parallel. The light spreads as if it were diffused, making it impossible for the eyes to recognize it firmly and accurately. It may be a partially blurred image that is out of focus, a locally reduced image, a partially magnified image, or a misalignment between lenses that causes moire. , You can get a wacky and flashy image effect.

FIG. 5 is a diagram schematically showing another cross section of the printed portion of the flexible packaging material in the second embodiment of the present invention.
The four sides are surrounded by the adhesive portion 6 to form a gap 7, but the adhesive portion 6 is divided into a large number of islands and a large number of gaps 7 are connected. The printing portions 8 are formed in the gaps 7 in a halftone dot pattern. By separating the adhesive portion 6 into an island shape, the adhesive portion 6 can be increased according to the image, and a gap can be surely secured.
In particular, in the package as shown in FIG. 5, since the gap 7 is not a closed space, the air in the gap 7 between the vapor-deposited film 3 and the transparent resin film 4 can be freely communicated with the adjacent gap 7 and the outside air. You can come and go to.
Therefore, the package 1 can be easily deformed by bending or folding, and the gap 7 itself can be changed in a large, fine, and delicate manner.
Since it is also a change in the distance between the halftone dot-shaped lens 5 and the printing unit 8 as shown in FIG. 4, it is possible to drastically change the change / deformation of the image.

Here, the base material is preferably a biaxially stretched crystalline resin film. For example, a biaxially stretched polypropylene film, a biaxially stretched polyethylene terephthalate film, a biaxially stretched polybutylene terephthalate film, a biaxially stretched polyamide film and the like can be considered, but a laminated film obtained by laminating other films may be used.

The film used for the vapor-deposited film is preferably a film having high heat resistance, being difficult to stretch, and being transparent, such as a biaxially stretched polyethylene terephthalate film, because heat is easily applied during the vapor deposition.

Further, the metal vapor deposition layer of the metal vapor deposition film is a glossy inorganic metal such as aluminum, and may be physical vapor deposition or chemical vapor deposition. As the metal of the vapor deposition material, in addition to aluminum, chromium, zinc, tin, gold, silver, copper, platinum, nickel and the like can be used. It is deposited to a thickness of about 400 nm to obtain a metallic luster. The thin-film deposition layer may be changed in gloss color or may be changed depending on the angle by using a multi-layered thin-film deposition film.

The transparent resin film is preferably a biaxially stretched polypropylene film, a biaxially stretched polyethylene terephthalate film, a biaxially stretched polyamide film, or a biaxially stretched film having high strength in which the pitch or the like does not easily change during processing, but obtains strict three-dimensionality. If not, don't necessarily stick to it.

For the net-like lens, use a high-definition dispenser and a movable table to drop high-viscosity transparent resin such as silicon resin, urethane resin, and acrylic resin into dots, or print the transparent resin with a printing machine. Can be manufactured. In particular, an ultraviolet curable resin is preferable because it can be expected to cure the wall thickness at high speed.
As the printing machine, an inkjet printing machine, a silk printing machine, a gravure printing machine, a flexographic printing machine, an offset printing machine and the like can be considered.

<Example>
As a base material, a 30 μm biaxially stretched polypropylene resin film was used.
An extramination machine was used on the back surface side of the base material, and a 40 μm linear low-density polyethylene resin was bonded as a sealant.
As the thin-film film, aluminum was vapor-deposited on one side of a 12 μm biaxially stretched polyethylene terephthalate film.
The aluminum-deposited surface of the vapor-film-deposited film was directed toward the base material, and the film was bonded via a two-component curable urethane-based adhesive using a dry lamination machine.
Using a printing in-line laminating machine, a packaging film was created with the following contents.
That is, the plate manuscript was made into halftone dots with a halftone background pattern in which the density of the darkest part was reduced to about 50% and the density of the brightest part was about 3%. It was printed on the non-deposited surface by the gravure method.
A 12 μm polyethylene terephthalate film is used as a transparent resin film, and a transparent varnish is used to match the pitch of the mesh dots of the plate document, and the transparent varnish is formed by coating the lens on the surface in the form of mesh dots, and the opposite of the lens. The surface was partially coated with an adhesive using a gravure printing method. A flexible packaging material was obtained by laminating the transparent resin film surface partially coated with the adhesive and the vapor-deposited film on which the image was printed by laminating with the base material.

<Comparison example>
As a base material, a 30 μm biaxially stretched polypropylene resin film was used.
An extramination machine was used on the back surface side of the base material, and a 40 μm linear low-density polyethylene resin was bonded as a sealant.
As the thin-film film, aluminum was vapor-deposited on one side of a 12 μm biaxially stretched polyethylene terephthalate film.
The aluminum-deposited surface of the vapor-film-deposited film was directed toward the base material, and the film was bonded via a two-component curable urethane-based adhesive using a dry lamination machine.
Using a printing machine, a packaging film was created with the following contents.
That is, the plate manuscript was made into halftone dots with a halftone background pattern in which the density of the darkest part was reduced to about 50% and the density of the brightest part was about 3%. It was printed on the non-deposited surface by the gravure method.
A transparent varnish was formed in halftone dots on the surface of the lens in accordance with the pitch of the halftone dots of the plate manuscript to obtain a flexible packaging material.

<Evaluation content>
The flexible packaging material prepared with the above configuration was cut into a rectangle having a length of 200 mm and a width of 125 mm according to the pattern, and three sides were sealed to create a packaging bag.
Coffee beans were placed inside the packaging bag as the contents, and the appearance and texture were evaluated.

The evaluation items were confirmed by the following four items.
As a visual three-dimensional effect, we confirmed the presence or absence of an overall three-dimensional effect when viewed with the left and right eyes.

As a partial three-dimensional effect, it was confirmed whether the part of the flexible packaging material having partial irregularities changed three-dimensionally depending on the contents and appeared to change more greatly.

As a three-dimensional effect by touch, it was confirmed whether the change in the visible image changes more than the magnitude of the deformation due to the slight deformation of the unevenness of the package when the package is slightly touched by hand.

As a comprehensive evaluation, it was confirmed that it was visually flashy and conspicuous, and that a pulsatile three-dimensional effect could be felt when touched.

<Package evaluation result>
In terms of the visual three-dimensional effect, both the examples and the comparative examples strongly felt the overall three-dimensional effect when viewed with the left and right eyes.

In the partial three-dimensional effect, in the embodiment, it seems that the partially convex or concave portion changes more three-dimensionally depending on the contents, the convex portion changes more convexly, and the concave portion changes more concavely. It was confirmed in. However, in the comparative example, the uneven portion lost the three-dimensional effect and was felt.

In the three-dimensional effect by touch, in the example, by touching, moire was generated depending on the state where the touched portion was locally changed, and it was felt that the touched portion moved more.
However, in the comparative example, the touched part seemed to lose the three-dimensional effect.

In the comprehensive evaluation, the examples were flashy and conspicuously eye-catching, and when touched, they seemed to move pulsatilely in response to the contact, so that the packaging had a high presence.
However, in the comparative example, although it was flashy and conspicuous when viewed from the front, there was no change when the line of sight was slightly deviated, and the presence of the package was significantly inferior to that of the example.

From the above results, in the package of the present invention, not only the visual three-dimensional effect but also the partially convex or concave portion looks more three-dimensional and the three-dimensional effect is touched. Since the movement can be felt more depending on the state where the part is locally changed, the visual effect is very high, and the presence of the package can be strongly confirmed.

As described above, the present invention forms a three-dimensional image on a soft film, and follows the slight movement of the film to make the image visible as if it were in a moire state or locally enlarged or reduced. It is a flexible packaging material that has a high aesthetic, dynamic, flashy and noticeable effect by making a special image change. Moreover, this flexible packaging material has great merits of the present invention, for example, it can be easily produced by existing equipment such as a normal laminating machine and a printing machine.

1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Flexible packaging material 2 ・ ・ ・ ・ ・ ・ ・ ・ ・ Base material 21 ・ ・ ・ ・ ・ ・ ・ ・ Sealant layer 3 ・ ・ ・ ・ ・ ・ ・ ・ Metal vapor deposition film 31 ······················································································································································································································‥ 52 ・ ・ ・ ・ ・ ・ ・ ・ Lens printing distance 6 ・ ・ ・ ・ ・ ・ ・ ・ ・ Adhesive 7 ・ ・ ・ ・ ・ ・ ・ ・ Gap 8 ・ ・ ・ ・ ・ ・ ・ ・ Printing unit 91 ・・ ・ ・ ・ ・ ・ ・ Incident light 92 ・ ・ ・ ・ ・ ・ ・ ・ Transmitted light for the left eye 93 ・ ・ ・ ・ ・ ・ ・ ・ Transmitted light for the right eye

Claims (4)

A flexible packaging material composed of at least a metal vapor-deposited film having a metal-deposited layer on the substrate side on one surface of a base material made of paper or a resin film, a transparent resin film, and a net-like lens. There,
The metal-deposited film is composed of a transparent resin film and a metal-deposited layer.
Having a gap formed between the metal-deposited film and the transparent resin film via a partially arranged adhesive portion, and a printing portion printed with mesh dots on the metal-deposited film side of the gap. Characterized flexible packaging material. The pitch of the halftone dots is formed to be equal to the pitch between the halftone dots for the left eye or the pitch between the halftone dots for the right eye among the two halftone dots printed by the halftone dots. The flexible packaging material according to claim 1. The flexible packaging material according to claim 1 or 2, wherein the distance between the printed portion printed with halftone dots and the halftone dot lens is close to the focal length of the halftone dot lens. The flexible packaging material according to any one of claims 1 to 3, wherein the halftone dot-shaped lens is a lens formed of transparent varnish.

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