JPH0515775Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a table top made of glass or plastic.

[Summary of the invention] This invention is a film-like article of a resin composition consisting of a photopolymerizable oligomer and a photopolymerizable monomer, or of photopolymerizable monomers, each having a different refractive index, on a table top made of glass or plastic. A light control film obtained by irradiating light from a predetermined angle and curing the film, which selectively scatters and transmits only incident light within a range of angles centered on the predetermined angle. A light control film, through which angularly incident light can be seen straight through, is applied to a glass or transparent plastic surface, or placed between a pair of glasses or transparent plastics, especially facing the table top. This is to prevent people from seeing your feet.

BACKGROUND OF THE INVENTION Conventional transparent glass or plastic table tops provide full visibility of the feet of the person facing the table top.

[Problems to be Solved by the Invention] Conventional table tops as described above are already widely used, especially from a fashion perspective. However, the following complaints may be raised regarding such table tops. In other words, the complaint is that the person facing the table top can see their feet.

However, from a fashion perspective, it may be difficult to abandon the use of a transparent table top.

The present invention focuses on the above-mentioned problems with conventional transparent glass or plastic table tops, and specifically aims to prevent the feet of the table top from being seen by people facing the table top, while maintaining transparency in all other directions. It concerns the maintained table top.

[Means for solving the problem] The table top according to the present invention selectively scatters only incident light within a pair of predetermined angle ranges with respect to the film, and transmits incident light at other angles. A control film is applied to a glass or transparent plastic surface, or placed between a pair of glass or transparent plastic, so that only a certain pair of angular ranges, for example, ±30° as measured from a direction perpendicular to the table top, is provided. Create a table top that cannot be seen through.

In addition, the light control film used in the present invention is obtained by curing a resin composition consisting of an oligomer and a monomer, or monomers each having a difference in refractive index, and is preferably a photopolymerizable film having a difference in refractive index. It is obtained by irradiating and curing a resin composition consisting of an oligomer and a photopolymerizable monomer or photopolymerizable monomers together with ultraviolet rays, but the angular dependence depends on the irradiation angle of ultraviolet rays, the difference in the refractive index of the resin composition, etc. It is determined accordingly. The thickness of the light control film used in the present invention is 20 to 2000 μm. The method for manufacturing this light control film was previously published in a patent application publication by the present inventors.
It is described in JP-A-1-77001, ``Light control plate and its manufacturing method'', and the same publication, JP-A-63-309902, ``Light control plate and its manufacturing method''.

Further, the transparent plastic plate used in the present invention is not particularly limited as long as it is transparent, and any transparent plastic plate can be used. Suitable examples include polycarbonate resin, acrylic resin, methacrylic resin, and polystyrene resin. Moreover, a float glass plate can be used as the glass plate used in the present invention.

Further, in the present invention, the method of attaching the light control film and the transparent plate such as transparent plastic or glass plate is not particularly limited, and any known method can be used. For example, as shown in FIG. 3, the light control film 1 may be applied to the surface of a glass plate or transparent plastic plate 2, and as shown in FIG. Alternatively, as shown in FIG. 5, the light control film 1 may be sandwiched between the glass plates 2 and 2', and a plastic plate 3 may be further bonded to the outer surface of the glass plate. good. Preferably, the outer surface of the plastic board is provided with a scratch-resistant coating.

[Effects of the invention] According to the table top of the present invention, the feet of the person facing the table top cannot be seen, and transparency is maintained in all other directions.

[Example] Next, an example of the table top of the present invention will be described with reference to the drawings.

Bisphenol A type epoxy acrylate 100
100 parts of tetrafluoroacrylate, and 6 parts of benzyl dimethyl ketal.The raw material for an ultraviolet-curable light control board is injected between 50 cm square glass plates with a 1 mm spacing, and the mixture is poured from the right and left sides from the vertical direction of the glass plate. A total of four rod-shaped ultraviolet irradiation devices (2KW, emission diameter 2cm, emission length 25cm) were installed at positions offset by 45 and 60 degrees from each other, with the emission length parallel to the glass plate and parallel to each other. , simultaneously irradiates with ultraviolet light. This operation makes it transparent when viewed from the front, and 30 to 80 degrees to the right or left of the front.
It becomes possible to produce a light control plate that becomes opaque within the tilted range. FIG. 6 shows the turbidity measurement results for this light control plate.

FIG. 1 shows a situation in which the table top of the present invention is used, and the table top is scattered so that the opponent cannot see his feet.

FIG. 2A shows a state in which light rays having an incident angle within ±30° are directly transmitted through the light control film used in the present invention.

FIG. 2B shows the situation in which light rays having an angle of incidence other than ±30° with respect to the film are scattered.

[Brief explanation of the drawing]

FIG. 1 shows the situation in which the table top of the present invention is used, and FIG. 2 shows the state of light transmission of the light control film used in the present invention. Further, FIGS. 3 to 5 show specific examples of cross-sectional views of the table top of the present invention. Furthermore,
FIG. 6 shows a specific example of the angle dependence characteristic diagram of the film. Explanation of symbols, a... Table top of the present invention,
X...I can't see it.

Claims (1)

[Claims for Utility Model Registration] (1) Light is applied from a predetermined angle to a film-like resin composition consisting of a photopolymerizable oligomer and a photopolymerizable monomer, or photopolymerizable monomers each having a different refractive index. A light control film obtained by irradiating and curing the film, which selectively scatters and transmits only incident light at an angle within a range centered on the predetermined angle, while incident light at other angles travels straight. A table top made of a laminate in which a light control film that can be seen through is attached to the surface of a transparent plate or inserted between a plurality of transparent plates. (2) The table top according to claim 1, wherein the predetermined angular range is ±30 degrees or more as measured from a direction perpendicular to the table.