JPH081084Y2 - Laminated sheet with a rainbow - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a laminated sheet excellent in decorativeness in which an arched rainbow appears artificially by utilizing light such as sunlight and the refractive index of transparent beads. The present invention relates to a laminated sheet which is attached to a wall surface or the like of a building and used for the purpose of aesthetic appearance and protection of a base material and also used as various decorative materials.

(Prior Art) Conventionally, there have been many decorative sheets that are attached to the wall surface of a building and use their own color and shape pattern.

For example, it is a wallpaper in which a coating material is laminated on paper or the like, a cloth wall material for weaving or coloring fibers, a vinyl cloth in which various patterns are printed on a synthetic resin sheet, a marking film and the like.

(Problems to be solved by the invention) However, the color of these makeup layers depends on the color of the makeup layer itself, the weather resistance cannot be maintained for a long time, and yellowing may occur in the future. There is a risk of discoloration. Further, there is a problem in that the color is not attractive because of the color of the makeup layer itself.

(Means for Solving Problems) In order to solve such problems, the inventors of the present invention have made earnest researches, and then, using transparent beads, create the same state as that of a natural rainbow, and change the angle to the angle of light. In response, we devised a laminated sheet with an arched rainbow.

That is, between the transparent resin sheet, the average particle size 50 ~ 2000
It is a laminated sheet showing a rainbow in which transparent beads of μm are spread so as not to overlap each other and a transparent resin sheet is heat-sealed.

In some cases, a bead-fixing net is sandwiched between the transparent resin sheets to fix the transparent beads, and the transparent beads are spread between the meshes of the fixed net so that they do not overlap each other, and the transparent resin sheet is heat-sealed. May be.

Usually, when trying to fix transparent beads on a sheet, you can apply an adhesive to the sheet and spray the beads from the top or fix it, or you can pre-mix the beads with a resin and apply it in a sheet shape. A method can be considered.

However, in both cases, the beads were fixed all around or mostly covered with the resin layer, and the original refractive index between the air layer and the beads, which was appropriate for the generation of the rainbow, was lost, and the rainbow was formed. It will not occur. Even if the refractive index can be adjusted well, it is difficult to arrange beads in a single line with this method, and the beads eventually overlap. As a result, a beautiful rainbow cannot be seen due to diffuse reflection.

Therefore, the present inventors have employed a method of heat-sealing a transparent resin sheet to fix the transparent beads so that the interface of the transparent beads is in contact with the air layer.

Also, if the beads cannot be fixed by this method, pay attention to using a net close to the bead particle size,
A bead fixing net is provided between the transparent resin sheet and the lower layer sheet, and the particle size is 50 to 2000 μm between the nets of the fixing net.
The transparent beads of (1) were spread, and most of the adhesive force was provided by bonding the upper and lower sheets to the net portion in the middle, and the beads were located in the voids, and most of the bead surface was fixed in contact with air.

Here, the transparent resin sheet is formed by molding a synthetic resin such as vinyl chloride, polyethylene, polypropylene, styrene, or vinyl acetate into a sheet, and is not particularly limited. Further, it may be colored to the extent that it does not interfere with incident light, or the surface may be provided with an uneven pattern.

The lower layer sheet may be a sheet having a smooth surface, such as a decorative printed sheet or a transparent sheet, and is not particularly limited.

Next, as the transparent beads sandwiched between the transparent resin sheet and the lower layer sheet, glass, plastic and the like can be considered, but glass beads are preferable from the viewpoint of more excellent weather resistance. The average particle size is preferably 50 to 2000 μm, but the particle size distribution is preferably sharp.

The material of the fixed net may be organic or inorganic, such as plastic net, metal net, glass fiber net, etc. The point is that the diameter of the beads is slightly larger than the diameter of the beads, or the thickness thereof, and the gap sandwiched between the upper and lower sheets can fix one bead. Further, various shapes such as a knitted fiber or a punched sheet may be used.

The fixing of the transparent resin sheet and the lower layer sheet and the fixing of the net and both sheets are performed by heat fusion by heating. Further, as long as the net and both sheets are fixed, good results can be obtained by using the adhesive only in the net portion.

(Operation) The present invention utilizes the principle of generating an arch-shaped rainbow when sunlight hits a water droplet in the air. First
As shown in the figure, when the sunlight D hits the water droplet D in the air and the sunlight refracted in the water droplet D enters the eyes of the observer A as reflected light, the refractive index at the interface between the air and the water droplet D is 1.33. And
In this case, the angle ψ between the first sunlight and the reflected light is 42.3 ° ~ 38.6
The main rainbow B appears at 0 ° and the subrainbow C appears at 50.0 ° to 57.7 °. Therefore, when trying to represent a rainbow with transparent beads, it is necessary to make it look like a natural rainbow. That is,
For example, when using glass beads having a refractive index of 1.49, the interface of the beads must be in contact with the air layer so that the interface has an appropriate refractive index. This is because if it is mixed with resin, its refractive index becomes too small and rainbow is not seen. Further, in order that the sunlight is refracted as uniformly as possible and the reflected light does not cause irregular reflection, it is necessary to prevent the transparent beads from overlapping as much as possible.

In the present invention, in order to create such a state, heat fusion is used to fix the beads. Further, in some cases, a bead-fixed net was used, and the transparent beads were spread over the mesh of the net, so that the transparent beads were evenly arranged, a uniform air layer was formed at the bead interface, and a vivid rainbow color appeared. Also, by adjusting the thickness of the bead-fixing net, it has become possible to adjust the overlap of the beads.

Example 1 As shown in FIG. 2, rectangular sheets are superposed and heat-sealed only on three sides. From the remaining one mouth, fill the transparent beads as shown in FIG. Heat seal one of the last remaining mouths,
Further, the whole is hot pressed to be flat. The rainbow-colored sheet produced in this way, when exposed to sunlight, showed a bright arch-shaped rainbow on its surface.

(Example 2) FIG. 4 shows a method for manufacturing a laminated sheet having a rainbow according to the present invention.

The lower layer sheet a having a thin adhesive applied to the surface thereof and the bead fixing net fed from the bead fixing net roll b are adhered to each other by the pressing roll g and enter the bead pool c in an overlapping state. The sheet and the bead-fixing net that have come out of the bead pool are in a state in which the meshes of the bead-fixing net are filled with beads. Here, the beads raised from the bead fixing net are scraped off by the doctor blade d. Next, the transparent resin sheet coming out from the transparent resin sheet roll e is put on the above-mentioned sheet, the bead fixing net and the transparent beads, and these are f
It is heat-sealed by the heat roller. The completed laminated sheet with a rainbow can be cut into an appropriate size as shown in Fig. 5 and attached to the wall surface of a building, etc. By sunlight or indoor light, an arched rainbow can be displayed as shown in Fig. 7. did.

(Effect) The present invention has been difficult in the past by sandwiching transparent beads between a transparent resin sheet and a lower layer sheet and thermally fusing and laminating them. The transparent beads can be easily fixed uniformly, and the refraction of sunlight peculiar to the beads is uniformly performed, so that the laminated sheet has a bright arch-shaped rainbow.

[Brief description of drawings]

FIG. 1 is a diagram showing the principle of appearance of an arch-shaped rainbow. 2 and 3 are perspective views showing a manufacturing process of a laminated sheet having a rainbow according to the present invention. FIG. 4 is a perspective view showing a manufacturing process of a laminated sheet showing a rainbow using the transparent bead fixing net according to the present invention. FIG. 5 is a perspective view showing a completed laminated sheet having a rainbow according to the present invention. Figure 6 shows
FIG. 5 shows a part of a cross section of the laminated sheet 1-1 'of FIG. FIG. 7 is a view in which an arch-shaped rainbow is generated by the laminated sheet in which the rainbow appears according to the present invention. A ... Observer B ... Main rainbow C ... Sub-rainbow D ... Water drop a ... Lower sheet b ... Bead fixing net c ... Bead pool d ... Doctor blade e ... Transparent resin sheet f ... Heat Roller g …… Pressing roll h …… Transparent beads

Claims (2)

[Scope of utility model registration request] 1. A rainbow-laminated sheet having a structure in which a transparent resin sheet is used as a surface layer, and transparent beads having an average particle diameter of 50 to 2000 μm are spread between the lower layer sheet and the lower layer sheet so as not to substantially overlap with each other. 2. A structure in which a transparent resin sheet is used as a surface layer and transparent beads having an average particle diameter of 50 to 2000 μm are spread between the lower sheet and a bead-fixing net and voids in the mesh of the net almost without overlapping. A unique laminated sheet with a rainbow that has flexibility.