JPH07261646A - Production of partial hologram packaging material - Google Patents

Abstract

PURPOSE:To provide a method for continuously producing a packaging material having partially a hologram forming layer and a non-hologram forming layer. CONSTITUTION:The partial hologram packaging material is produced by extruding a synthetic resin molten body 13 in between a base material 12 and relief type hologram stamper 15 mounted on a cooling roll 14 from a T-shaped die 11 to laminate the body 13 on the base material 12 and to emboss a hologram of a finely rugged pattern on the surface of the synthetic resin molten body 13, partially forming a transparent resin layer on the hologram forming layer 13a and forming a vapor deposited film of a metal or metal oxide at least on the hologram forming layer 13a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is suitable for use in bags for packaging snacks, candy, chocolate, etc., and is a hologram for producing a partial hologram packaging material having a three-dimensional and beautiful design effect. Regarding the method.

[0002]

2. Description of the Related Art Conventionally, as one of methods for reproducing a hologram, a method for forming a surface relief type hologram forming layer by embossing a smooth plastic material,
This is a method of forming the hologram-forming layer by a mechanical pressing method, so that the hologram forming layer can be manufactured at a low cost and is relatively suitable for mass production.

In view of these, as a method for producing a packaging material or the like having a relief type hologram forming layer continuously, for example, by the applicant of the present invention, Japanese Patent Laid-Open No. 191872/1987.
Japanese Patent Application Laid-Open No. 62-192779. In this manufacturing method, an embossing roll (14) having a relief hologram stamper (15) on the surface is used to form a relief hologram on a molten synthetic resin layer (13) extruded from a T-type die (11). At the same time, it is laminated on the substrate (12). Next, a light reflection layer made of a metal vapor deposition film of aluminum or the like is formed on the hologram forming layer side. According to this method, it is possible to manufacture a material for packaging having a light reflection hologram at an extremely high speed and with good efficiency.

[0004]

[Problems to be Solved by the Invention] As described above,
It is possible to continuously manufacture a hologram forming layer having a fine concavo-convex pattern and a laminate material including the substrate and the hologram forming layer at the same time. However, since there are holograms on the entire surface, there is a problem that other decorations impair the hologram effect, and it is unsuitable when a hologram forming layer is required partially.

Therefore, an object of the present invention is to provide a method for continuously producing a packaging material having a hologram forming layer partially.

[0006]

In order to achieve the above object, the present invention is to mount a synthetic resin melt (13) from a T-type die (11) on a substrate (12) and a cooling roll (14). The relief type hologram stamper (15) is extruded and laminated on the base material (12), and a hologram having a fine concavo-convex pattern is embossed on the surface of the synthetic resin melt (13). A transparent resin layer (1) is partially formed on the hologram forming layer (13a).
7, 17) is formed, and at least in the hologram forming layer,
The method for producing a partial hologram packaging material is characterized in that a vapor deposition film (18) of metal or metal oxide is formed.

The present invention will be described in detail below. Figure 1
It is explanatory drawing which shows the shaping | molding of the hologram formation layer in the manufacturing method of the partial hologram packaging material of this invention. As shown in FIG. 1, a transparent film such as stretched polypropylene, polyethylene terephthalate, or nylon can be used as the substrate (12), and the thickness is 12 to 50 μm.
Is the range normally used. Further, as the synthetic resin melt (13) extruded from the T-shaped die (11) of the extrusion molding machine, transparent resins such as polyethylene and polypropylene can be used. The synthetic resin melt (13) extruded from the T-shaped die (11) is a hologram stamper (1) mounted on the surface of the cooling roll (14).
5) and the base material (12) inserted by the nip roll (16) are extruded to laminate the base material (12) and at the same time, the hologram forming layer (13) is formed on the surface.
Simultaneously with the molding of a), it is cooled by a cooling roll.
The thickness can be adjusted within a wide range by adjusting the thickness, but a range of 12 μm to 50 μm is preferable as a packaging material.

The reason why the synthetic resin melt (13) is used for molding the hologram forming layer (13a) is that the minute concavo-convex pattern of 700 to 1500 lines / mm of the hologram forming layer is uniformly embossed with good reproducibility. However, when a resin film is used, for example, the smoothness of the film surface is insufficient and it is difficult to form a high quality hologram forming layer.

Next, as shown in the sectional view of FIG. 2, the laminated base material (12) and hologram forming layer (13a).
A transparent resin layer (17, 17) is formed on a partial area of the hologram surface by the fine concavo-convex pattern. The transparent resin layers (17, 17) are gravure coated, air knife coated, on the hologram forming layer (13a),
It can be formed by a conventional coating method such as doctor coating. This transparent resin layer is used to partially erase the fine concavo-convex pattern of the hologram forming layer (13a) and make that portion a non-hologram forming layer. The transparent resin layers (17, 17) are not limited to being colorless and transparent, but may be semitransparent or colored transparent,
It can be appropriately selected.

Next, a vapor deposition film (18) is formed on the entire surface of the hologram forming layer (13a) and the transparent resin layers (17, 17). The vapor deposition film (18) can be formed from a vapor deposition film of metal or metal oxide. It is preferable to use a metal vapor deposition film, which is formed in order to make the hologram forming layer having a fine concavo-convex pattern formed on the surface brighter. As this metal, one having a high surface reflectance is desirable, and aluminum, gold, silver, copper, tin, and an alloy containing these metals can be used. Further, as the metal oxide, one having a high refractive index is desirable, and for example, silicon oxide, titanium oxide or the like can be used. As a method of forming the vapor deposition film (18), a method such as a vacuum vapor deposition method, a sputtering method or an ion plating method can be used. The thickness of the vapor deposition film (18) is appropriately in the range of 100 to 3000Å, and preferably 3 when used as a packaging material.
0 to 1000Å is good.

This vapor-deposited film (18) is a transparent resin layer (1
7 and 17) and the hologram forming layer (13a) and the hologram forming layer (13a) excluding the transparent resin layer (17, 17) region by a mask during vapor deposition as shown in FIG. It is also possible to form only on the part).

Further, by forming the seal layer (19) on the vapor deposition film (18), a stereoscopic effect with a deep hologram portion is produced. As the seal layer (19), for example, unstretched polypropylene, low density polyethylene or the like can be used. This resin film can be laminated by a dry laminating method via an adhesive, or can be formed by a laminating method by an extruder, and can be appropriately selected.

As shown in FIG. 5, the partial hologram wrapping material obtained with the above structure is a wrapping material consisting of a hologram forming layer portion and a non-hologram forming portion when viewed from above the base material.

[0014]

In this manufacturing method, it is possible to manufacture a partial hologram packaging material by using a stamper partially formed with a hologram having a fine concavo-convex pattern, but it is necessary to prepare a large number of stampers, It is technically difficult to produce a hologram stamper with a fine concavo-convex pattern, and waste is increased. On the other hand, in the method for manufacturing a partial hologram packaging material of the present invention, a part of the hologram image of the hologram forming layer (13a) is filled with the transparent resin layer (17, 17), and the whole or a part of the hologram image is filled with metal. Alternatively, a metal oxide vapor deposition film (1
By forming 8), it is possible to obtain a partial hologram packaging material having a high design property, which can easily and simultaneously form a hologram portion and a non-hologram portion.

[0015]

EXAMPLES Specific examples will be described with reference to the drawings.

<First Embodiment> A first embodiment will be described with reference to FIGS. 1 and 2. Between the transparent stretched polypropylene having a thickness of 15 μm as the base material (12) and the hologram stamper (15) mounted on the cooling roll (14), a transparent polypropylene resin as a synthetic resin melt (13) is thickly formed. Then, the hologram forming layer (13a) having a fine concavo-convex pattern is formed on the surface of the base material (12) at the same time as being extruded to a thickness of 20 μm (see FIG. 2A).
Next, in a partial region of this hologram forming layer (13a),
Moreover, a plurality of transparent resin layers (17, 1) are formed in stripes by the polyurethane adhesive along the flow direction of the substrate.
7) is formed (see FIG. 2B).

Next, a vapor deposition film (18) of aluminum is formed on the entire surfaces of the hologram forming layer (13a) and the transparent resin layers (17, 17) by a vacuum vapor deposition method. Further, for use as a packaging material, a non-stretched polypropylene resin is extruded on the back surface of the vapor-deposited film (18) by press lamination to form a seal layer (19). Thereby, as shown in FIG. 5, a packaging material having a stripe-shaped hologram forming layer is obtained. When this packaging material was viewed from above the base material (12), a partial hologram packaging material having alternating stripe-shaped hologram portions and stripe-shaped non-hologram portions having a metallic luster layer as a lower layer was obtained.

<Second Embodiment> A second embodiment will be described with reference to FIG. A transparent polypropylene film having a thickness of 15 μm was used as the base material (12), and a transparent polypropylene resin was used as the synthetic resin melt (13) extruded from the T-type die. Otherwise in the same manner as in Example 1, a laminated material having a hologram forming layer (13a) was obtained.

Next, as shown in FIG. 4A, stripe-shaped transparent resin layers (17, 17) are formed in a partial area of the hologram forming layer (13a). As the transparent resin, a polyurethane adhesive is applied along the flow direction of the base material (12) to form a plurality of transparent resin layers.
Next, a striped aluminum vapor deposition film (1) is formed by a vacuum vapor deposition method on the hologram forming layer (13a) having a fine concavo-convex pattern except the transparent resin layers (17, 17).
8) Formed. Furthermore, a sealing layer (1) is formed on the entire surface of the vapor-deposited film (18) and the transparent resin layer side (17, 17) by an extrusion lamination method using a low density polyethylene resin.
9) is formed. As a result, a partial hologram packaging material having stripe-shaped hologram portions and stripe-shaped completely transparent non-hologram portions alternately was obtained.

[0020]

As described above, according to the present invention, a transparent resin layer is formed in a partial area of a hologram forming layer having a fine concavo-convex pattern without replacing the hologram stamper, and a metal or metal oxide is formed. The vapor-deposited film of the product provides a packaging material with an excellent design in which a hologram portion and a non-hologram portion are partially provided. In addition, this packaging material is formed by forming a transparent resin layer and a vapor deposition layer on a partial area of the hologram forming layer entirely or partially so that the hologram forming layer and the transparent portion having metallic luster or the hologram forming layer are completely formed. Since a packaging material having a transparent portion can be obtained, the packaging material can be excellent in design, and the decorativeness of the hologram is not impaired even if other decorations are applied.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a forming portion of a hologram forming layer with a T-type die in a method of manufacturing a partial hologram packaging material of the present invention.

FIG. 2 is a cross-sectional explanatory view showing a manufacturing process in a method of manufacturing a partial hologram packaging material according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a partial hologram packaging material.

FIG. 4 is a sectional view (b) of a partial hologram packaging material (a) and a partial hologram packaging material in the process of being manufactured according to another embodiment of the present invention.

FIG. 5 is a plan view of a partial hologram packaging material.

FIG. 6 is a schematic view showing a method for continuously producing a packaging material with hologram.

[Explanation of symbols]

 10 ... Extrusion molding machine 11 ... T type die 12 ... Base material 13 ... Synthetic resin melt 13a ... Hologram forming layer 14 ... Cooling roll (embossing roll) 15 ... Hologram stamper 16 ... Nip roll 18 ... Evaporation film 19 ... Seal layer

Claims (4)

[Claims] 1. A synthetic resin melt is extruded from a T-type die between a base material and a relief type hologram stamper mounted on a cooling roll to be laminated on the base material, and at the same time, on the surface of the synthetic resin melt. A hologram forming layer is molded, a transparent resin layer is partially formed on the surface of the hologram forming layer, and the entire surface of the transparent resin layer and the hologram forming layer,
A method for producing a partial hologram packaging material, which comprises forming a vapor-deposited film of metal or metal oxide. 2. The method for producing a partial hologram packaging material according to claim 1, wherein a seal layer made of a film or a molten resin is formed on the entire surface of the vapor deposition film side. 3. The method for manufacturing a partial hologram packaging material according to claim 1, wherein the vapor deposition film is partially formed in a region other than the transparent resin layer. 4. The method for producing a partial hologram packaging material according to claim 1, wherein a sealing layer made of a film or a molten resin is formed on the entire surface of the vapor deposition film side.