JPH0644687Y2 - Laminated sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a laminated sheet used as a packaging material or a decorative sheet.

[Prior Art] Conventionally, as a flexible laminated sheet used for various packaging materials, for example, a packaging bag, one side of a base film such as polyester or nylon is printed, and a hot-melt resin such as polyethylene is printed on the printed side. There is a layer provided, and it is generally used in the form of a three-sided sealing bag or a four-sided sealing bag by stacking such a laminated sheet so that the hot-melt resin layer is on the inner side and heat-sealing the periphery. Has been done.

Further, it is also practiced to laminate the above-mentioned laminated sheet on the surface of a plastic molded product or a wood product to add a decorative effect.

[Problems to be Solved by the Invention] However, in the conventional laminated sheet as described above, the pattern printed on the base film is limited to a flat pattern, and therefore, as a packaging material or a decorative sheet. However, it is difficult to improve the design of the product and it is easy to manufacture a similar product.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a laminated sheet that has an excellent design effect and is useful for preventing forgery.

[Means for Solving the Problems] In order to achieve the above object, the laminated sheet of the present invention has a base material layer made of a transparent synthetic resin and one surface of the base material layer made of a transparent synthetic resin. An intermediate resin layer having one surface and an uneven surface on the other surface, a metal deposition layer provided on the entire uneven surface of the intermediate resin layer, and a hot-melt resin coated on the surface of the metal deposition layer It is characterized by comprising layers.

An ink layer may be provided on the uneven surface of the intermediate resin layer instead of the metal vapor deposition layer.

Further, an ink layer may be provided on a part of the uneven surface of the intermediate resin layer, and a metal vapor deposition layer may be provided on the remaining part.

[Function] In a laminated sheet in which a metal vapor deposition layer is provided on the entire uneven surface of the intermediate resin layer, light incident from the upper surface is diffusely reflected by the uneven surface, so that it shines variously depending on the condition of the light ray and the viewing direction. appear.

Further, in a laminated sheet having an ink layer provided on the entire uneven surface of the intermediate resin layer, light incident from the upper surface is diffusely reflected by the uneven surface, so that the pattern formed by the ink layer is partially three-dimensional. appear.

Further, in a laminated sheet in which an ink layer and a metal vapor deposition layer are mixedly provided on the uneven surface of the intermediate resin layer, the pattern partially looks three-dimensional in the ink layer portion and the metal vapor deposition layer portion is viewed in the direction of viewing. It looks differently shining.

Embodiments Embodiments will be described below with reference to the drawings.

FIG. 1 is a partial sectional view showing an embodiment of a laminated sheet according to the present invention.

In the figure, the laminated sheet 1 includes a base material layer 2 made of polyester and having a thickness of 12μ, and an intermediate resin layer 3 made of polyethylene having a thickness of 30μ and an uneven surface provided on one side thereof. Aluminum (20-50μ) on the entire surface
Is provided with a metal vapor deposition layer 4 and a heat-melt resin layer 5 made of polyethylene having a thickness of 30 μ is formed on the lower surface thereof.
Is provided by coating.

The uneven surface of the intermediate resin layer 3 is uneven on the surface of polypropylene when polyester that is the base material layer 2 and polyethylene that is the intermediate resin layer 3 are extruded and laminated using a cooling roll having an uneven pattern engraved on the surface. Applied by forming. The concavo-convex pattern on the surface of the cooling roll is, for example, as shown in FIG. 2 (a). As shown in FIG.
20 to 20 linear protrusions 6 having a semicircular cross-section of ~ 50μ
A plurality of linear protrusions 6 are arranged in parallel at intervals of 0 μ, and a repeating pattern is continuously formed by the plurality of linear convex portions 6. As the planar shape of the uneven pattern, in addition to such a repeating pattern, square convex portions are regularly arranged vertically and horizontally, and concave portions communicating with each other are formed in a grid pattern. Alternatively, the square may be replaced with a diamond or a triangle, and various other patterns may be used.

Although it is possible to use other metals as the metal vapor deposition layer 4, it is preferable to vapor deposit aluminum as described above.

Although the base material layer 2 is made of polyester in the above embodiments, it may be made of drawn polypropylene, drawn nylon or the like. As the material of the intermediate resin layer 3 and the hot-melt resin layer 5, polypropylene, ethylene vinyl acetate copolymer, or the like can be used in addition to the above-mentioned polyethylene.

In the laminated sheet 1 having the above-described laminated structure, since the metal vapor deposition layer 4 is in contact with the uneven surface of the intermediate resin layer 3, the light from above is diffusely reflected by the uneven surface of the intermediate resin layer 3 and the condition of the light beam is increased. And it looks different depending on the direction of viewing.

Further, as a laminated sheet of another aspect of the present invention, there is one in which an ink layer having a pattern formed by printing is provided on the uneven surface of the intermediate resin layer 3 in place of the metal vapor deposition layer 4, and in this case, Due to irregular reflection of light on the uneven surface, the pattern formed by the ink layer partially looks three-dimensional.

Further, as a laminated sheet of still another aspect of the present invention,
There is one in which an ink layer and a metal vapor deposition layer are provided on the uneven surface of the intermediate resin layer 3 in a mixed manner. In this case, light is diffusely reflected on the uneven surface so that the pattern is uniform in the ink layer portion. In addition to the three-dimensional appearance, the portion of the metal vapor deposition layer appears to shine differently depending on the viewing direction.

Each of the above-mentioned laminated sheets can be used for various other purposes such as various packaging materials such as packaging bags and wrapping sheets, and decorative sheets. When used as a packaging bag, a three-side sealed bag is prepared by heat-sealing the hot-melt resin layers 5 made of polyethylene with the surface of the hot-melt resin layers 5 inside.
It is in the form of a four-sided seal bag or the like.

[Advantages of the Invention] The present invention is configured as described above, and since light is diffusely reflected by unevenness of the metal vapor deposition layer or the ink layer inside the laminated sheet, it may appear to be bright or partially three-dimensional. It is possible to differentiate products by the appearance and to add a high-class design property.
Further, since it becomes difficult to manufacture a product similar to such a laminated sheet, it is possible to prevent counterfeit products.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing an embodiment of a laminated sheet according to the present invention, FIG. 2 (a) is a partial plan view showing an uneven pattern on the surface of a cooling roll, and FIG. 2 (b) is FIG. It is an enlarged view of the part B in (a). 1 ... Laminated sheet, 2 ... Base material layer, 3 ... Intermediate resin layer,
4 ... Metal vapor deposition layer, 5 ... Hot-melt resin layer, 6 ... Linear protrusion

Claims (3)

[Scope of utility model registration request] 1. A base material layer made of a transparent synthetic resin, and an intermediate resin layer made of a transparent synthetic resin, one surface of which is adhered to one surface of the base material layer and the other surface of which has an uneven surface. ,
A metal vapor deposition layer provided on the entire uneven surface of the intermediate resin layer,
A laminated sheet comprising a heat-melted resin layer coated on the surface of the metal vapor deposition layer. 2. A base material layer made of a transparent synthetic resin, and an intermediate resin layer made of a transparent synthetic resin, one surface of which is adhered to one surface of the base material layer and the other surface of which has an uneven surface. ,
A laminated sheet comprising an ink layer provided on the entire uneven surface of the intermediate resin layer and a hot-melt resin layer coated on the surface of the ink layer. 3. A base material layer made of a transparent synthetic resin, and an intermediate resin layer made of a transparent synthetic resin, one surface of which is adhered to one surface of the base material layer and the other surface of which has an uneven surface. ,
An ink layer provided on a part of the uneven surface of the intermediate resin layer and a metal deposition layer provided on the remaining part of the uneven surface of the intermediate resin layer, and heat coated on the surface of the metal deposition layer and the ink layer. A laminated sheet comprising a molten resin layer.