JPH0721309Y2 - Light diffusing laminate and bag and container using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention uses a light diffusing laminated body which brings out a metallic luster and continuously changes the luster depending on the viewing angle. Regarding bags and containers.

(Prior Art) In order to realize a high-class design in packaging materials and the like, conventionally, one utilizing metal luster has been proposed.
As one of them, for example, a single-sided matte film is attached to the surface of a metal foil such as aluminum foil or a metal layer made of aluminum vapor-deposited polyester so that the matte surface is the surface, and the matte on the surface is partially There is one that is smoothed to form a glossy portion. In addition, there is also one in which a portion other than the printed portion is made to have a glossy portion by printing using a transparent ink partially containing irregular reflection substances such as a foaming agent on the surface of the metal layer as described above.

Furthermore, in addition to the above, by using hot stamping technology and materials such as UV curable resin, unevenness of extremely small width (around 1 μm) is formed on the surface of the plastic, and this is combined with metal vapor deposition to give a metallic luster. The product to be obtained is used for a product utilizing optical interference such as a hologram.

(Problems to be solved by the invention) In the former two cases, a moderately high-class design can be obtained by devising a design composed of a glossy portion and a non-glossy portion. Each of these merely separates a glossy portion and a non-glossy portion, and the gloss is also emphasized only when viewed from the side opposite to the light source.

Further, the latter one is essentially different from the one that makes the best use of the luster of metal in a high-class design, and it is difficult to design it so as to freely obtain a metallic luster having strength and weakness depending on the viewing direction.

The present invention has been made in view of the above problems, and can bring out a metallic luster and can provide a high-class design in which the strength of the luster continuously changes depending on the viewing direction. An object is to obtain a light diffusing laminate, a bag and a container using the same, which make it difficult to produce a similar product.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the light diffusion laminate according to the present invention comprises linear protrusions having a semicircular cross section with a diameter of 5 to 50 μm and having substantially the same height. A plurality of regular patterns, which are 20 to 200 μm apart and are arranged in parallel at substantially the same interval, are set by changing the arrangement angle of the linear convex portions, and these plural types of patterns are formed on the surface of the transparent plastic layer. The linear convex portions are formed so as to be continuously repeated for each predetermined region, and a metal foil or a vapor deposition film layer is laminated on the back surface of the plastic layer.

A heat-resistant protective layer made of a curable resin may be provided on the surface of the plastic layer.

In addition, a bag is formed by laminating a heat-melting resin layer on the back surface of the light-diffusing laminate using the above-mentioned light-diffusing laminate, and partially heat-sealing the heat-melting resin layers. You can

Further, using the light diffusion laminate, a laminate formed by laminating paper having a basis weight of 200 g / m ² or more on the back surface of the light diffusion laminate,
A container can be formed by sequentially punching, folding, and pasting the laminated body.

(Function) In the present invention, the diameter of transparent plastic is 5
The linear convex portion having a semicircular cross section of 50 to 50 μm functions as a directional lens. Then, a plurality of types of regular patterns in which a plurality of such linear protrusions are spaced apart by 20 to 200 μm and arranged at approximately the same interval in parallel are set by changing the arrangement angle of the linear protrusions, and a transparent plastic is formed. By forming linear projections on the surface of the layer so that these plural types of patterns are continuously repeated for each predetermined region, it is possible to disperse the gloss enhancement in a plurality of directions. Therefore,
By laminating a metal foil or a vapor deposition film layer on the back surface of such a plastic layer, light received from the surface by the metal foil or the like is selectively emphasized in a direction orthogonal to the arrangement angle of the linear convex portion. It is possible to obtain a high-class design in which the metallic luster is strong and weak in a plurality of viewing directions.

Further, by providing a heat-resistant protective layer made of a curable resin on the surface (uneven surface) of the light diffusion laminate, the surface can be protected.

In the laminated body as described above, a bag is formed by laminating a heat-melting resin layer on the back surface of the metal foil or the vapor deposition film layer and partially heat-sealing the resin layers. Further, a container can be formed by laminating a paper having a basis weight of 200 g / m ² or more on the back surface of the metal foil or the like and then sequentially performing punching, creasing, and pasting.

(Example) Hereinafter, an example will be described with reference to the drawings.

FIG. 1 is a cross-sectional view of a light diffusing laminate according to an embodiment of the present invention, FIG. 2 is a partial plan view of the light diffusing laminate, and FIG. 3 is an enlarged view of part A of FIG.

In this embodiment, the light diffusion layered body 1 is formed by laminating a transparent uneven resin layer 4 such as polypropylene (PP) on an upper surface of an aluminum foil 2 which is a central base material via an anchor coat (AC) layer 3. A corona discharge treatment is applied to the surface of the uneven resin layer 4, and a heat resistant layer 5 made of a heat resistant resin such as nitrocellulose having a thickness of 1 to 10 μ is laminated on the surface side by printing or coating. Also, on the lower surface of the aluminum foil 2,
A polyester (PET) layer 7 and a polyethylene (PE) layer 8 are sequentially laminated via an adhesive layer 6. The above PP
The uneven resin layer 4 is molded by using a cooling roll having an uneven pattern engraved on the surface thereof to extrusion laminate the PP or the like and at the same time providing unevenness on the surface. Further, the heat-resistant layer 5 is removed at the bonded portion.

The surface of the light diffusing laminated body 1 having the above-mentioned laminated structure has a plurality of linear convex portions 9 having a semicircular cross-sectional shape with a diameter of 5 to 50 μm and arranged in parallel with each other, and these adjacent lines. The concave-convex surface is formed by the flat concave portions 10 formed between the linear convex portions 9, and the interval between the linear convex portions 9 is 20 to 200.
It is set to μm. A plurality of such linear protrusions 9 form one pattern, and
As shown in FIGS. 2 and 3, this pattern is arranged so that plural kinds of patterns are continuously repeated with different arrangement angles of the linear convex portions 9. With this configuration, the light received from the surface of the light diffusion laminate 1 can be selectively emphasized in the direction orthogonal to the arrangement angle of the linear convex portion 9 and reflected by the aluminum foil 2. it can. The direction of reflection and the degree of emphasis can be freely controlled by the arrangement angle and the number of the linear protrusions 9.

The light diffusion layered product 1 as described above can be used for various purposes, and the material or the laminated structure can be changed as follows according to the purpose.

For example, when it is used as a packaging bag, the laminated structure is uneven resin layer (20μ) / AC / PET (12μ) / printing / adhesive / aluminum foil (7μ) / PE (40μ), or Heat-resistant layer / uneven resin layer (30μ) / AC / printing / aluminum deposition
PE (12μ) / PE (40μ), which is a heat-meltable resin
A bag is formed by heat-sealing the PEs with the surface inside.

When used for labels, wrapping paper, etc., the laminated structure may be heat-resistant layer / uneven resin layer (20μ) / AC / printing / aluminum foil (7μ) / adhesive / thin paper (35g / m ² ). Alternatively, it is formed by punching or cutting as a heat-resistant layer / uneven resin layer (20 μ) / AC / printing / aluminum vapor deposition paper (35 g / m ² ).

Furthermore, when it is used as a liquid paper container, its laminated structure has a printing / concavo-convex resin layer (30μ) / AC / aluminum foil (9μ)
/ Adhesive / Paperboard (350g / m ² ) / PE (20μ), Heat-resistant layer / Printing / Uneven resin layer (30μ) / AC / Aluminum-deposited PET (12
μ) / adhesive / paperboard (350 g / m ² ) / PE (20 μ), which is formed by sequentially performing punching, folding, and pasting.

When it is used as a paper box, it is punched out in the same manner as above with a laminated structure consisting of heat-resistant layer / uneven resin layer (30μ) / printing / AC / aluminum foil (7μ) / adhesive / thin paper (400g / m ² ). It is formed by sequentially performing crease processing and pasting processing.

In each of the above-described embodiments, when the sealant layer (resin layer), the paperboard, etc. are laminated on the back surface of the metal layer such as the aluminum foil, the lamination may be performed continuously by winding.

In the above-mentioned embodiment, the heat-resistant layer 5 is formed of a heat-resistant resin such as nitrocellulose, but in addition to this, room temperature curability, thermosetting, ultraviolet curability, or
It can also be made of a curable resin having electron beam curability. Furthermore, the uneven resin layer 4 is made of P
E, EVA (ethylene-vinyl acetate copolymer), PP, PET,
Alternatively, a resin such as Surlyn may be used. Further, as the adhesive, it is appropriate to use an olefin resin when the adherend layer is an aluminum foil and paper and an olefin resin or a urethane resin when an aluminum foil and a film. A transparent adhesive is used on the surface side of the metal layer of the foil. For printing, it is preferable to use transparent ink for the metallic tone portion and opaque ink for the non-metallic tone portion.

On the other hand, the repeating pattern of the linear convex portions 9 may be arranged so that the angle is continuously changed in a curvilinear manner, instead of arranging a plurality of straight lines at a desired angle as described above. Good. Further, in order to disperse the gloss, the linear convex portion 9
It is preferable that the interval is 1.5 to 3 times the diameter of the convex portion.

The present invention is capable of various other embodiments.

(Effect of the Invention) Since the present invention is configured as described above, it is possible to bring out the metallic luster and to obtain a high-class design in which the strength and weakness of the luster continuously changes depending on the viewing direction. Moreover, since it is very difficult to manufacture a similar product, it is possible to easily identify the similar product and protect consumers.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a light diffusing laminate according to an embodiment of the present invention, FIG. 2 is a partial plan view of the light diffusing laminate, and FIG. 3 is an enlarged view of part A of FIG. 1: Light diffusion laminated body, 2: Aluminum foil, 4: Concavo-convex resin layer, 5: Heat resistant layer, 9: Linear convex part.

Claims (4)

[Scope of utility model registration request] 1. A regular pattern in which a plurality of linear convex portions having a semicircular cross-section having a diameter of 5 to 50 μm and having substantially the same height are arranged in parallel at approximately the same distance with a distance of 20 to 200 μm. A plurality of types of linear convex portions are set with different arrangement angles, and linear convex portions are formed on the surface of the transparent plastic layer so that these plural types of patterns are continuously repeated for each predetermined region. A light diffusing laminate, characterized in that a metal foil or a vapor deposition film layer is laminated on the back surface of the. 2. The light diffusion laminate according to claim 1, wherein a heat-resistant protective layer made of a curable resin is provided on the surface of the plastic layer. 3. A regular pattern in which a plurality of linear convex portions having a semicircular cross-sectional shape with a diameter of 5 to 50 μm and having substantially the same height are arranged in parallel at approximately the same distance with a distance of 20 to 200 μm. A plurality of types of linear convex portions are set with different arrangement angles, and linear convex portions are formed on the surface of the transparent plastic layer so that these plural types of patterns are continuously repeated for each predetermined region. To form a light diffusion laminate by laminating a metal foil or a vapor-deposited film layer on the back surface of the heat diffusion resin layer and partially heat the heat fusion resin layers by laminating a heat melting resin layer on the back surface of the light diffusion laminate. A bag characterized by being sealed. 4. A regular pattern in which a plurality of linear convex portions having a semicircular cross-sectional shape with a diameter of 5 to 50 μm and having substantially the same height are arranged in parallel at approximately the same distance with a distance of 20 to 200 μm. A plurality of types of linear convex portions are set with different arrangement angles, and linear convex portions are formed on the surface of the transparent plastic layer so that these plural types of patterns are continuously repeated for each predetermined region. A metal foil or a vapor-deposited film layer is laminated on the back surface of the above to form a light diffusion laminate, and the back surface of the light diffusion laminate is laminated with paper having a basis weight of 200 g / m ² or more, and punched out. A container characterized by being formed by sequentially performing crease processing and pasting processing.