JP2002178460A - Multilayer sheet made of synthetic resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multilayer sheet made of a synthetic resin which enables improvement of the effect of recognition of a metallic powder mixed inside the sheet and also enables reduction of the use of the powder. SOLUTION: The sheet is constituted at least of a base layer and a transparent layer having light-transmitting properties and the metallic powder is mixed in a dispersed state in the transparent layer, while the base layer is colored.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin multilayer sheet provided as a raw material for a synthetic resin packaging container or the like.

[0002]

2. Description of the Related Art As shown in FIG. 6, a conventional synthetic resin sheet has a metallic powder 91 dispersed in a single-layer sheet 90 made of synthetic resin. It is of a configuration that is kneaded in. The single-layer sheet 90 is a sheet in which a main material itself is colored, and is formed by kneading metallic powder 91 in a dispersed state in the colored sheet 90.

However, the synthetic resin single-layer sheet 90 is a sheet in which metallic powder 91 is kneaded in a colored sheet 90, and the sheet itself is colored, so that the sheet is externally provided. Only the surface of the sheet 90 or the surface near the surface of the sheet 90 is recognized, and there is a disadvantage that sufficient glossiness cannot be exhibited despite the presence of the metallic powder 91.

The single-layer sheet 90 made of synthetic resin is
Since the metallic powder is scattered throughout the inside of the sheet, the metallic powder 91 is present from the front side to the unrecognized inside and the back side, and there is also a problem that a large amount of the metallic powder 91 is required. . Accordingly, an object of the present invention is to provide a synthetic resin multilayer sheet capable of improving the effect of recognizing metallic powder mixed in a sheet and reducing the amount of metallic powder used.

[0005]

Means for Solving the Problems and Effects of the Invention In order to achieve the above object, a synthetic resin multilayer sheet of the present invention comprises:
It is characterized by comprising at least a base layer and a light-transmitting transparent layer, wherein a metallic powder is mixed in a dispersed state in the transparent layer, and the base layer is colored. Since the synthetic resin multilayer sheet having the above-described structure has the metallic powder kneaded into the transparent layer, all of the metallic powder present in the transparent layer will be reliably recognized from the surface side, and the metallic powder is mixed. Thus, effects such as glossiness can be sufficiently exhibited.

Further, in this multilayer sheet, at least 2
Due to the formation of the layer sheet, it is only necessary to mix the metallic powder only in the transparent layer, and it is not necessary to mix the metallic powder in the base layer. Moreover,
Since the transparent layer can be formed thin, the required amount of metallic powder can be reduced as compared with a conventional single-layer sheet. Furthermore, since metallic powder is not mixed in the base layer, various materials can be used as the material of the base layer, and in particular, it is possible to use recycled materials.

[0007] The synthetic resin multilayer sheet according to the second aspect of the present invention is characterized in that a colored layer is provided between the base layer and the transparent layer. In the synthetic resin multilayer sheet having the above-described configuration, the coloring layer is provided by laminating the transparent layer, so that the coloring layer can adopt a color that makes the transparent layer more prominent, and the color of the base layer. The glossiness due to the metallic powder can be further exhibited without being affected by the metallic powder.

[0008] Furthermore, the synthetic resin multilayer sheet according to claim 3 of the present invention is characterized in that a transparent layer containing no metallic powder is laminated on a transparent layer containing metallic powder. In the synthetic resin multilayer sheet having the above structure, the transparent layer in which the metallic powder is mixed can be protected, so that the thickness of the transparent layer including the metallic powder can be reduced, and the required amount of the metallic powder can be reduced. be able to. Therefore,
In the multilayer sheet having this configuration, since the transparent layer can be formed thinner than the multilayer sheet according to claim 1 or 2, the amount of metallic powder can be further reduced, and the transparent layer is sufficiently protected. You can also.

[0009]

Next, a preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a synthetic resin multilayer sheet according to one embodiment of the present invention. The synthetic resin multilayer sheet 1 includes a base layer 10
The metallic layer 20 is formed by laminating the metallic layer 20 on the base layer 10. The base layer 10 is formed from, for example, a sheet made of polystyrene, polypropylene, or another synthetic resin. The base layer 10 is colored so that the metallic powder 30 mixed with the metallic layer 20 can be emphasized. For example, if the metallic powder 30 is gold, the base layer 10 is made a dark color such as black. Thereby, the metallic powder 30 is more prominent.

The metallic layer 20 is a synthetic resin sheet made of, for example, polystyrene or the like, and is entirely formed of a transparent material. In the metallic layer 20, metallic powder 30 is mixed in a dispersed state. The metallic powder 30 is made of, for example, fine particles such as gold powder or other powder or small pieces made of glass or the like, and is preferably made of a material having a good affinity for the metallic layer 20.

The multilayer sheet 1 can be used as a food packaging container or other synthetic resin container by molding the sheet. In the multilayer sheet 1, the metallic layer 20 is formed as a transparent body, and the metallic powder 30 is mixed in a dispersed state in the metallic layer 20, so that a more brilliant gloss is obtained. Moreover, since the base layer 10 is laminated on the metallic layer 20 and the base layer 10 is colored in a dark color, the metallic powder 30 is more clearly and more clearly recognized. In addition, metallic powder 30
Is mixed only in the thinly formed metallic layer 20, so that the amount of the metallic powder 30 used can be reduced.

Since it is not necessary to mix the metallic powder 30 in the base layer 10, various materials can be used as the base layer. For example, the base layer can be formed using recycled materials. FIGS. 2, 3, 4, and 5 are cross-sectional views showing other embodiments of the present invention. The multilayer sheet 2 shown in FIG. 2 has the same configuration as the multilayer sheet 1 of the above embodiment, except that a metallic layer 20 is further provided on the back side of the base layer 10, and the metallic layer 20 is also provided inside the metallic layer 20. This is a configuration mode in which powder 30 is mixed, in which metallic layers 20 are formed on both sides of base layer 10, respectively.

The multilayer sheet 2 of this embodiment can enhance the glossiness of the metallic powder 30 on both sides of the base layer 10. FIG.
3 shows an example in which a transparent layer 40 is further provided on the multilayer sheet 1 of the first embodiment on the surface side of the metallic layer 20. The multilayer sheet 3 of this embodiment can protect the surface of the metallic layer 20 with the transparent layer 40, and can suitably protect the surface of a molded container or the like.

The multilayer sheet 4 shown in FIG. 4 shows an example in which a colored layer 50 is provided between the base layer 10 and the metallic layer 20 with respect to the multilayer sheet 1 of the first embodiment. In the multilayer sheet 4 of this embodiment, the metallic layer 20 can be further emphasized by the colored layer 50 provided on the back surface side of the metallic layer 20 and the base layer 10
The selection range for the material, color, and the like can be expanded. The multilayer sheet 5 shown in FIG. 5 has a configuration in which the configurations of the multilayer sheet 3 and the multilayer sheet 4 are combined, and includes a transparent layer 40, a metallic layer 20,
It comprises a coloring layer 50 and a base layer 10.

Therefore, the surface of the multilayer sheet 5 can be suitably protected.
It can make the metallic powder 30 of the metallic layer 20 stand out vividly.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a synthetic resin multilayer sheet according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a multilayer sheet showing another embodiment of the present invention.

FIG. 3 is a sectional view of a multilayer sheet showing still another embodiment of the present invention.

FIG. 4 is a cross-sectional view of a multilayer sheet showing another embodiment of the present invention.

FIG. 5 is a cross-sectional view of a multilayer sheet showing another embodiment of the present invention.

FIG. 6 is a sectional view showing a conventional multilayer sheet.

[Explanation of symbols]

 1,2,3,4,5 Multilayer sheet 10 Base layer 20 Metallic layer 30 Metallic powder

Claims (3)

[Claims] 1. A synthetic resin made of at least a base layer and a transparent layer having a light-transmitting property, wherein a metallic powder is mixed in a dispersed state in the transparent layer, and the base layer is colored. Multi-layer sheet. 2. The synthetic resin multilayer sheet according to claim 1, wherein a colored layer is provided between the base layer and the transparent layer. 3. On a transparent layer containing metallic powder,
The synthetic resin multilayer sheet according to claim 1 or 2, wherein a transparent layer containing no metallic powder is laminated.