JP2698859B2 - Light-diffusing translucent panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative panel which is fitted into a light wall, a light ceiling or the like and is viewed through a light beam.

[0002]

2. Description of the Related Art A panel in which various decorations are applied to a light-transmitting synthetic resin plate is fitted into a ceiling, a wall, or the like, and a light source (lighting fixture) is installed on a back surface to be used for indoor decoration. It is used as a substitute for glass and stained glass.

[0003] Usually, a lighting fixture provided on the back side of the panel is formed using a fluorescent lamp or the like so that light from the lighting fixture is radiated to the outside from the entire panel. On the other hand, the panel itself is a colorless and transparent synthetic resin to which a colorant or a pigment is added as long as it has optical transparency, a pattern such as a picture or coloring is provided on the front surface or the back surface, or the panel itself has a multilayer structure. It is publicly known that the above-described pattern is provided between the decorative panels, and these decorative panels are configured to exhibit a pattern such as a pattern or a mosaic or a colored color by a lighting device such as a fluorescent lamp provided on the back side. Have been.

When a fluorescent lamp, a light bulb or the like is used as a light source,
Since these light sources are linear light sources or point light sources, there has been a problem that the contour of the light source clearly appears on the front surface side of the panel, resulting in uneven light. In order to solve this problem in the related art, (1) the contour is formed because the distance between the light source and the panel is short. (2) Generally, a plurality of lighting devices are used. However, if the distance (pitch) between the lighting devices is long, the illuminance becomes uneven. Therefore, the number of lighting devices is increased as much as possible to shorten the interval. (3) Another light diffusing plate is arranged between the lighting fixture and the panel. And other methods have been adopted as improvements.

However, in the above method (1), a large space is required for fitting the panel, and wasteful space is increased, and the thickness of the wall and the height of the ceiling are limited.
In the method (2), the number of lighting fixtures increases, so that the cost increases, and the power consumption during use increases, which is uneconomical. Further, in the method (3), it is necessary to separately attach another panel, so that there is a problem that the material cost is increased and the installation is troublesome.

In order to solve the above-mentioned drawbacks, the applicant of the present invention simply mounts the panel in place of a conventional decorative panel, and a single panel has sufficient light diffusion and translucency to provide a back lighting. As a decorative panel in which the contour of the light source is not visible, from a transparent or translucent synthetic resin with a back layer of 2 to 5 mm thick in which irregular irregularities are formed on the surface of a colored synthetic resin that is made translucent by dispersing titanium white, There has been proposed a decorative panel comprising a surface layer and a pattern layer provided between the surface layer or the back surface layer and the surface layer (Japanese Utility Model Publication No. 3-37999).

[0007]

When the number of fluorescent lamps is reduced and the pitch is further lengthened to further reduce the distance between the fluorescent lamps and the panel, in the case of the above-mentioned panel to which titanium white is added, titanium white is added. When the addition amount is further increased, the light diffusion effect is increased and the contour of the fluorescent lamp cannot be identified, but there is a problem that the amount of transmitted light is significantly reduced.

The present invention has been made to solve the above-mentioned drawbacks of the prior art, and provides a sufficient light even when the number of fluorescent lamps is smaller and the distance between the fluorescent lamps and the panel is short. An object of the present invention is to provide a light-diffusing light-transmitting panel which has a diffusion effect, cannot identify a fluorescent lamp tube line, and has a practically sufficient light transmittance.

[0009]

The light-diffusing light-transmitting panel of the present invention is a panel which has an irregular pattern formed on at least one surface of a synthetic resin plate, transmits light, and has a diffusive property. 0.02% to 0.5% by weight of a titanium white pigment and 0.5% to 3% by weight of a calcium carbonate-based light diffusing agent.
% By weight.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an external perspective view showing an example of the light-diffusing translucent panel of the present invention, and FIG. 2 is a cross-sectional view showing a vertical cross section taken along line II-II of FIG. 3 to 5 are sectional views showing other examples of the light-diffusing translucent panel of the present invention.

As shown in FIG. 1, the light-diffusing translucent panel 1 of the present invention is a panel having an irregular concavo-convex pattern 2 formed on the surface of a synthetic resin plate to transmit light and diffuse.
The irregular concavo-convex pattern 2 of the panel 1 may be provided on both front and back surfaces as shown in FIGS. 1 and 2, or may be provided on only one side of the front surface (or back surface) as shown in FIG.

The material of the synthetic resin plate is, for example, a titanium white pigment for diffusing light into a curable resin such as an unsaturated polyester resin, an acrylic resin, an epoxy resin, an epoxy acrylate resin, and an acrylic-modified urethane resin; A composition obtained by mixing a diffusing agent, a reinforcing material, other fillers, additives such as a catalyst, and the like is used.

According to the present invention, titanium white is used as a pigment which does not significantly reduce light transmittance and has a good light diffusing property, and is further combined with a calcium carbonate light diffusing agent to form the above titanium white and calcium carbonate light diffusing agent. It is important to specify the amount of addition to a specific range.

Titanium white pigment has a certain degree of light transmittance and good light dispersibility as compared with other pigments and dyes, and is excellent when used in combination with the following calcium carbonate light diffusing agent. High light transmittance and light diffusion are obtained. The addition amount of titanium white is 0.02 to 0.5% by weight based on 100 parts by weight of the resin. If the addition amount is less than 0.02%, light diffusion is insufficient, and the addition amount is 0.5%. If the amount exceeds 10% by weight, the light transmittance is lowered, and a practical light-transmitting panel cannot be obtained.

By adding 0.5 to 3% by weight of a calcium carbonate-based light diffusing agent used in combination with a titanium white pigment, good light transmittance and light diffusing property can be obtained. If the addition amount is less than 0.5% by weight, the light diffusion effect cannot be sufficiently obtained, and if it exceeds 5% by weight, the dispersibility in the resin is remarkably reduced, resulting in poor dispersion and good translucent panel. I can't.

Examples of the reinforcing filler added to the synthetic resin include glass fibrous materials such as glass mat, glass cloth, glass roving, and glass chop, and synthetic fibrous materials such as nylon, vinylon, and tetron. Of Japanese paper.

Further, other additives such as a coloring agent can be added to the synthetic resin.

The pattern 5 can be formed on the light-diffusing translucent panel of the present invention as shown in FIG. As the pattern 5, an arbitrary pattern such as a flora and fauna, a geometric pattern, and an abstract pattern is used. The pattern can be formed as relief unevenness on the front, inside, and back surfaces, or can be formed by printing using a printing ink.

The light-diffusing light-transmitting panel 1 of the present invention may be formed with a matte surface. To form a mat, fine irregularities can be provided on the panel surface or the mold surface by any means (eg, sandblasting). Although not particularly shown, the surface of the irregular uneven pattern 2 may be formed in matte. By making the surface matte, the light diffusivity is further improved.

The light-diffusing light-transmitting panel 1 of the present invention can have a configuration in which a plurality of synthetic resin layers are laminated as shown in FIGS. For example, as shown in FIG. 2, a three-layer structure in which the surface layer 3 and the back layer 4 are laminated with the intermediate layer 7 interposed therebetween, or a two-layer structure of the surface layer 3 and the back layer 4 can be formed.
FIG. 5 shows an example in which a pattern 5 is formed on the surface layer 3. In the case of such a multilayer structure, it is sufficient that the titanium white pigment and the calcium carbonate-based light dispersant are added to at least one layer, and the irregular uneven pattern 2 is formed on at least one surface.

As shown in FIGS. 1 and 2, a three-layer structure is used.
When the pattern 5 is formed on the intermediate layer 7, a titanium white pigment and a calcium carbonate-based light diffusing agent can be added to the intermediate layer 7.

When producing the panel 1 of the present invention, the above-mentioned synthetic resin composition is poured into a mold having a surface corresponding to a desired surface shape (eg, irregular unevenness, matte shape, relief pattern, etc.), It can be formed by curing at normal temperature or by heating. Further, if necessary, a pattern such as a picture is formed on the front surface, the inside, and the back surface by a printing method such as screen printing.

The light-diffusing light-transmitting panel of the present invention is used by being fitted into a window, a wall ceiling, or the like, and by transmitting sunlight or illumination light from the back side of the panel, irregular irregular patterns or patterns are formed. The pattern or the like of the layer appears on the surface, and an excellent decorative effect is obtained.

Hereinafter, the present invention will be described in more detail with reference to specific examples of the present invention. Examples 1 to 4 A resin liquid in which titanium white and a calcium carbonate-based light diffusing agent were added to the following resin liquid formulations in the ratio shown in Table 1 was poured between molds having a mold having irregular irregularities on the surface. After leaving it until it gelled, it was cured by heating at 40 ° C for 3 hours in a heating furnace.
The resultant was cut into a predetermined size to obtain a light-diffusing light-transmitting panel having an irregular pattern on the front and back surfaces having a thickness of 2 to 4 mm. Using the obtained panel, the degree of visibility, the total light transmittance and the light diffusion of the fluorescent tube line were measured. Table 1 shows the obtained results.

[0025]

[Table 1]

[Resin liquid composition] 100 parts by weight of unsaturated polyester resin 1 part by weight of cobalt-based curing accelerator 30 parts by weight of reinforcing material (glass fiber) 30 parts by weight of catalyst (methyl ethyl ketone peroxide) 1 part by weight

The calcium carbonate-based light diffusing agent is a Lumipearl DSN-7 having an average particle size of 4.5 to 5 μm and a specific gravity of 2.8, which is formed by adding an additive to high-purity calcium carbonate and heat-treating the mixture. Special Chemical Co., Ltd.) was used.

The fluorescent tube line visibility test for evaluating the light diffusivity shown in Table 1 was conducted 200 mm in front of the fluorescent tube line 8 with a pitch (P) of 200 mm as shown in FIG.
The panel was placed at (interval D) and the degree of visibility was determined by visually observing how much the contour of the fluorescent lamp could be visually recognized.
And evaluated in five stages. 1: clear, 2: somewhat clear, 3: blurry, 4: slightly visible, 5: almost invisible.

The light transmittance is JIS K6717, K671.
The light diffusivity was calculated according to the following equation 1 according to the light transmittance test method of No. 8.

[0030]

[Formula 1] Light diffusivity (%) = Diffuse light transmittance / Total light transmittance × 100 [1]

Comparative Examples 1 to 5 For comparison, a resin solution was prepared by adding a titanium white or calcium carbonate-based light diffusing agent in an amount shown in Table 1 to a resin composition having exactly the same composition as in the example. A light-diffusing translucent panel was obtained in the same manner as in the example, and the panel was used to measure the visibility of the fluorescent tube line, the total light transmittance, and the light diffusivity. still,
In Table 1, Comparative Examples 1 to 3 use only a titanium white pigment without using a light diffusing agent, Comparative Example 4 uses only a light diffusing agent, and Comparative Example 5 uses a titanium white pigment and a light diffusing agent. Are not used at all.

[0032]

The light-diffusing light-transmitting panel of the present invention has an excellent light-emitting effect in which a light-diffusing effect is obtained by an irregular concavo-convex pattern. A diffusion effect is obtained, and the addition of a calcium carbonate-based light diffusing agent further improves the light diffusing effect of the titanium white pigment, and the addition of the light diffusing agent does not significantly reduce the light transmittance. As a result, as compared with the case where the titanium white pigment is simply increased, the light diffusion property is excellent, the contour of the light source is not identified, and the light transmittance is sufficiently high for practical use.

[0033]

As described above, the light-diffusing light-transmitting panel of the present invention has excellent light-diffusing properties and a high total light transmittance, so that it can be compared with a conventional panel to which only a titanium white pigment is added. Thus, even if the distance between the light sources is further increased and the distance between the light sources and the panel itself is further reduced, the effect that the contour of the light sources does not appear can be obtained. Therefore, since the number of light sources can be reduced as compared with the conventional light diffusion panel, the cost of the light source is reduced, the power consumption is reduced, the economy is improved, and the depth of the space in which the panel is fitted is reduced. Since it can be formed, useless space can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an external appearance of an example of a light-diffusing translucent panel of the present invention.

FIG. 2 is a sectional view showing a vertical section taken along line II-II of FIG.

FIG. 3 is a sectional view showing another example of the light-diffusing light-transmitting panel of the present invention.

FIG. 4 is a sectional view showing another example of the light-diffusing light-transmitting panel of the present invention.

FIG. 5 is a sectional view showing another example of the light-diffusing light-transmitting panel of the present invention.

FIG. 6 is an explanatory view showing a test method for a light-diffusing translucent panel.

[Explanation of symbols]

 1 Light-diffusing translucent panel 2 Irregular uneven pattern

Claims (1)

(57) [Claims] 1. A panel in which an irregular pattern is formed on at least one surface of a synthetic resin plate to transmit and diffuse light, wherein a titanium white pigment is contained in an amount of 0.02% by weight to 0.1% by weight.
5% by weight and 0.5% by weight of calcium carbonate based light diffusing agent
Light-diffusing light-transmitting panel, characterized in that the light-diffusing light-transmitting panel contains about 3% by weight