JP2012032655A - Laminate film with hologram, method for manufacturing the same and container using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminate film with a hologram and a method for manufacturing the laminate film with the hologram, capable of firmly uniting a hologram layer with a laminate film after transferring the hologram to the outermost surface of the laminate film, and a container using the laminate film with the hologram.SOLUTION: A laminate film with a hologram is made by the following processes: an ultraviolet curable resin is applied on the roughened outermost surface of a laminate film and a hologram pattern is transferred on the ultraviolet curable resin and hardened by an ultraviolet ray. The ultraviolet curable resin is not mixed with silicon or other release agents having a release property and the laminate film with the hologram is made by promptly applying ultraviolet curable resin successively after roughening the outermost surface of the laminate film by a corona discharge or the like.

Description

  The present invention relates to a laminate film with a hologram fixed by performing hologram processing on the outermost surface of a laminated film, a method for producing the same, and a technique for improving a container using the same.

Conventionally, as a sheet processing method of a hologram structure, for example, in Utility Model Registration No. 3113143, a printing layer made of an inkjet film or a transparent sheet is formed on a hologram layer made of a hologram sheet, A configuration is disclosed in which a protective layer made of a laminate film is formed thereon to form a three-layer laminate, and the visibility expressed from the hologram surface is changed by the density of the printing ink.
Japanese Patent Application Laid-Open No. 2006-21394 discloses an information holding member characterized by sequentially stacking a reflective layer, a hologram recording layer, and a protective layer.
In the above conventional configuration, since the hologram effect is provided on the film, irregularities are formed on the surface, and if the concave portions are contaminated, there is a possibility that the hologram of the portion is stained or peeled off, and a protective layer is formed on the surface There was a need.
Therefore, there were the following problems.
1 Adhering of floating dust, etc. occurs due to static electricity during lamination.
2 There is a large risk of trouble occurring in post-processes such as mold making, and costs and labor are required to maintain the management system.
3 It is possible to fix and stabilize hologram processing by applying or printing a surfactant having a polarization performance different from that of transparent ink or material on the hologram surface, but it takes a lot of time for additional processing and secondary processing. And cost.
On the other hand, a configuration in which a hologram is integrally fixed on the outermost surface of a laminate film is known.
For example, JP-A-60-254174 discloses a hologram duplication method in which a hologram pattern is transferred to an ultraviolet curable resin coated on a base film and cured with ultraviolet rays to form a hologram.
Further, in the hologram manufacturing method and the holographic manufacturing apparatus disclosed in JP-A-8-36352, a hologram pattern is transferred to an ultraviolet curable resin applied on a base film and cured with ultraviolet rays to continuously form a hologram. Is disclosed.
Here, it is difficult to bond and integrate the individually produced laminate film and the hologram sheet due to problems such as air bubbles and positional displacement.
Therefore, it is preferable to apply an ultraviolet curable resin to the laminate film, transfer the hologram pattern, and cure with ultraviolet rays to integrate the hologram. Adhesion could not be obtained, and the hologram layer might peel off after transfer.

JP-A-60-254174 Utility Model Registration No. 3113143 JP-A-8-363522006-21394 JP-A-60-254174 JP-A-8-36352

  The problem to be solved by the present invention is that a hologram is transferred to the outermost surface of the laminate film and the hologram layer can be firmly integrated with the laminate film, a method for manufacturing the same, and a method for producing the same To provide a container.

In order to achieve the above object, the present invention provides a first aspect of the present invention.
A laminate film with a hologram obtained by applying an ultraviolet curable resin on a roughened film on the outermost surface of the laminate film, transferring a hologram pattern onto the ultraviolet curable resin layer, and curing it integrally with ultraviolet rays,
The UV curable resin does not contain silicon or other release agents with releasability,
The laminate is characterized in that the outermost film of the laminate film is roughened by a corona discharge or an air blast system or the like and then immediately coated with an ultraviolet curable resin.
In the invention of claim 2,
The ultraviolet curable resin is coated with a flexographic plate using a flexographic plate, and a hologram pattern is transferred onto the pattern coat.
Furthermore, in the invention of claim 3,
A large number of nano-level scratches are provided on the surface of a substrate on which a hologram pattern is transferred to the outermost surface of the laminate film and cured with ultraviolet rays.
The laminate film with holograms according to claims 1 to 3 can be laminated on a substrate to form a sheet, or used as a container material.
In the invention of the container of claim 4,
It was molded using the laminate film with a hologram according to any one of claims 1 to 3.
In the present invention, the term “container” is used in a broad sense including bags and boxes, and uses such as packaging and decoration are not particularly limited.
In the invention of claim 5,
A method for producing a laminate film with a hologram, in which an outermost surface film of a laminate film is roughened, an ultraviolet curable resin is applied, a hologram pattern is transferred onto the ultraviolet curable resin layer, and cured integrally with ultraviolet rays. There,
The UV curable resin does not contain silicon or other release agents with releasability,
It is characterized in that an ultraviolet curable resin is applied immediately after the surface of the laminate film is roughened by corona discharge or air blast system.

In the container using the hologram sheet of the present invention, the outermost film of the laminate film is roughened and immediately coated with an ultraviolet curable resin, and the hologram pattern is directly transferred to the ultraviolet curable resin and irradiated with ultraviolet rays. Because the UV curable resin does not contain a release agent, it has high fixability between the UV curable resin and the outermost film of the laminate film, and the transferred hologram pattern is firmly integrated into the laminate film. be able to.
In addition, since it is not necessary to supply an excessive amount of ultraviolet irradiation during the lamination process, it is possible to easily ensure heat resistance without causing discoloration, annihilation, deformation, deterioration, etc. of the provided embossed film and processed product. it can.

It is the schematic which shows a hologram processing apparatus and a process sequence. (A) is a cross-sectional view of a laminate film before hologram processing, (b) is a cross-sectional view of the laminate film after UV-curing resin coating, (c) is a cross-sectional view of the laminate film after hologram pattern transfer, (d) is It is sectional drawing of the laminate film after ultraviolet curing resin hardening. It is sectional drawing of the laminate film with a hologram which provided the polarizing layer in the hologram layer.

  Hereinafter, preferred embodiments of a laminate film with a hologram of the present invention, a method for producing the same, and a packaging container using the same will be described with reference to the drawings.

  The laminate film with hologram 10 of Example 1 and a container using the same have a configuration in which hologram processing is performed on the outermost layer of a laminate film in which a plurality of films are laminated.

  As shown in FIG. 2A, for example, the laminate film 1 includes a non-stretched film layer 2 as a base material, and a barrier layer between the non-stretched film layer 2 and a PET (polyethylene terephthalate) resin layer 4. As an example, an aluminum film layer 3 is interposed.

The types of the resin layer and the barrier layer used for laminating the laminate film 1 are not limited to the above examples, and any known combination of films can be appropriately used as the laminate film.
Further, instead of the PET resin layer 4, a resin having an adhesive property with an ultraviolet curable resin can be used.

Next, an example of a hologram processing apparatus is shown in FIG.
The laminate film 1 is preferably an untreated fresh material, and is used in a state of being wound into a roll.
That is, the long laminate film 1 wound in a roll shape is pulled and moved in the rewinding direction (indicated by an arrow in the figure) by the first roller device 11.
Basically, each transport roller is at the same speed, and a load other than the left and right tension control by adjusting the meandering is not applied to the film or sheet base material.

A roughening device 12 is provided on the upstream side of the conveying path during the movement, and the surface side of the laminate film 1 is roughened.
In this embodiment, a corona discharge or air blast system is used as the roughening device, but other roughening configurations may be used.
Here, the air blast system increases the adhesive force by spraying negative ions, and includes plasma blast.

Is the laminate film 1 suitable for normal wettability regardless of substrate? Can be used.
As an example, a material having a thickness of about 28 dynes / cm is used, but the surface is roughened to about 38 to 42 dynes / cm to enhance the adhesion.

A resin coating device 13 for coating the roughened laminate film with an ultraviolet curable resin is provided downstream of the roughening device 12 in the conveyance path.
The coating may be performed on the entire surface of the laminate film, but in the present invention, a flexographic plate can be used for the coating and pattern coating may be performed.

If the pattern coating is applied, partial hologram transfer is possible, so that the width of the design and pattern can be expanded.
Moreover, according to the present Example, an ultraviolet curable resin can be applied immediately after a roughening process (refer FIG.2 (b)).

As the ultraviolet curable resin used here, it is preferable to use an ultraviolet curable resin which does not contain a material having releasability such as silicon in order to improve the fixability of a hologram described later.
In addition, the ultraviolet curable resin layer 5 preferably has a thickness from 4 μm to 7 μm because the emboss diameter or depth of a general hologram is 3 μm to 6 μm.
In the case of a dot lens or Fresnel lens pattern, the coating amount is appropriately adjusted according to the interval between the concentric embosses.

Next, a pressure roller 14 for transferring the hologram pattern 21 a provided on the hologram sheet 21 to the ultraviolet curable resin layer 5 of the laminate film 1 is provided on the downstream side of the resin coating device 13 in the conveyance path. Yes.
Here, the hologram sheet 21 of the present embodiment has a known configuration in which a concavo-convex pattern for hologram is provided on the surface of a transparent film (the surface facing the ultraviolet curable resin layer).

  The hologram sheet 21 is wound in a roll shape, and is attached to a second roller device 22 that pulls the hologram sheet 21 at the same speed as the first roller device 11 in the vertical direction.

  The second roller device 22 pulls the long hologram sheet 21 wound in a roll shape in the direction of rewinding, and together with the laminate film 1 pulled by the first roller device 11, the pair of upper and lower pressing rollers 14. The hologram pattern 21a of the hologram sheet 21 is transferred onto the uncured ultraviolet curable resin layer 5 (see FIG. 2C).

On the line following the pressing roller 14, an ultraviolet irradiation device 15 is provided to transfer the hologram pattern 21 a and to cure the ultraviolet curable resin layer 5 by irradiating with ultraviolet rays.
In the illustrated example, the ultraviolet rays are irradiated through the hologram film. However, when the laminate film 1 is transparent, it may be irradiated through the laminate film.
The hologram film after transfer is wound up by the second roller device 22 on the exit side after passing through the ultraviolet irradiation device 15.

The winding by the second roller device 22 may be performed before the ultraviolet irradiation device 15. In that case, a process of coating a quick-drying epoxy urethane resin on the upstream side of the pressing roller 14 may be provided.
And it cools with cooling devices, such as the fan 16, after the transcription | transfer by an ultraviolet-ray.
Thereby, hologram processing is performed on the PET resin layer 4 which is the outermost surface layer of the laminate film 1, and the hologram layer 6 is integrally formed (see FIG. 2D).

Instead of the fan 16, an air blast (plasma irradiation device) and an LED ultraviolet lamp (not shown) may be installed.
Moreover, you may use the hardening reaction by the electron beam hardening | curing apparatus containing not only the said ultraviolet lamp but an ultraviolet-ray.
That is, the light reflection angle on the surface of the embossed pattern of the hologram layer 7 is fixed by a curing reaction unique to the ultraviolet curable resin.
Furthermore, by physical treatment including the plasma irradiation on the processing line,
As a result, the polarizing layer 8 having nano-level flaws can be formed and fixed on the surface of the embossed pattern on the micron level of the transferred hologram layer 7 (see FIG. 3). ,
The nano-level polarizing layer 8 can prevent the hologram layer 7 from being deteriorated due to hand dirt or the like, and can inhibit the hologram pattern from being difficult to see due to water or oil.

  The laminate film 1 having the hologram layer 6 formed as described above is directly used, or laminated on the surface of another base material to form a sheet or container material, such as a bag, a box, or other appropriate shape. A container is formed.

  In the present invention, a laminate film is used, and it is only necessary to perform hologram processing on the outermost surface, so that a hologram layer is formed on the outermost surface, which makes it easy to visually recognize and uses a laminate film. Processing or molding can be easily performed, and the peel strength can be secured.

As described above, in the present invention, since the hologram film itself is not used, the base material to be processed is at a discretion, and the molding shape can be easily reduced and the cost can be reduced.
Moreover, even if it has a hologram layer, it can be laminated easily.
The present invention is not limited to the above-described embodiment, and it is needless to say that various design changes can be made without departing from the scope of the present invention.

  The present invention can be widely applied to fields related to packaging or containers such as the food packaging field, the medical field, and the industrial field.

DESCRIPTION OF SYMBOLS 1 Laminated film 2 Unstretched film layer 3 Aluminum film layer as an example of a barrier layer 4 PET resin layer used as the outermost surface 5 UV curable resin layer (uncured)
7 Hologram layer 8 Polarizing layer 10 Laminated film with hologram 11 First roller device
12 Roughening device 13 Resin coating device 14 Pressure roller 15 Ultraviolet irradiation device 16 Fan 21 Hologram sheet 22 Second roller device

The laminate film 1 may be of also conventional wet suitability choosing a substrate.
As an example, a material having a thickness of about 28 dynes / cm is used, but the surface is roughened to about 38 to 42 dynes / cm to enhance the adhesion.

As described above, in the present invention, since the hologram film itself is not used, the base material to be processed is at a discretion, and molding can be facilitated and the cost can be reduced.
Moreover, even if it has a hologram layer, it can be laminated easily.
The present invention is not limited to the above-described embodiment, and it is needless to say that various design changes can be made without departing from the scope of the present invention.

Claims (5)

A laminate film with a hologram obtained by applying an ultraviolet curable resin on a roughened film on the outermost surface of the laminate film, transferring a hologram pattern onto the ultraviolet curable resin layer, and curing it integrally with ultraviolet rays,
The UV curable resin does not contain silicon or other release agents with releasability,
A laminate film with a hologram, wherein a film on the outermost surface of the laminate film is roughened with a corona discharge or an air blast system or the like and then immediately coated with an ultraviolet curable resin.   2. The laminate film with a hologram according to claim 1, wherein a flexographic plate is used for coating the ultraviolet curable resin, the ultraviolet curable resin layer is pattern coated, and the hologram pattern is transferred onto the pattern coat.   The laminate film with hologram according to claim 1 or 2, wherein a number of scratches having a nano-level length are provided on the surface of a substrate on which a hologram pattern is transferred to the outermost surface of the laminate film and cured with ultraviolet rays. .   A container formed using the hologram-laminated laminate film according to claim 1. A method for producing a laminate film with a hologram, in which an outermost surface film of a laminate film is roughened, an ultraviolet curable resin is applied, a hologram pattern is transferred onto the ultraviolet curable resin layer, and cured integrally with ultraviolet rays. There,
The UV curable resin does not contain silicon or other release agents with releasability,
A method for producing a laminate film with a hologram, comprising: coating an ultraviolet curable resin immediately after a surface of a laminate film is roughened with a corona discharge or an air blast system.

Images