JPH05148820A - Light-reflecting apparatus - Google Patents

Abstract

PURPOSE:To improve visibility at dawn, in the morning, at dusk and in the night (lighted with outdoor lamps), and in the rainy and foggy weather. CONSTITUTION:In a light-reflecting apparatus made up by placing a layer 3 containing transparent beads 2 like glass beads that are supported with transparent resin adhesive agent 1 over a reflecting surface, a transparent resin layer 4 made of one of such materials as polymethyl methacrylate, polycarbonate or polystyrene under specific condition of restriction is placed on the layer 3 containing the transparent beads 2, and fluorescent coloring matters 5 are scattered therein. Thereby a transparent fluorescent layer 6 can be formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is effective for use in road markings for protecting the safety of pedestrians and vehicle drivers, the construction of signs and indicator boards, and the construction of advertisements. The present invention relates to a highly visible light reflection device.

[0002]

2. Description of the Related Art According to Japanese Utility Model Publication No. 54-41787, a reflective substrate, glass fine particles held on the reflective substrate by a transparent resin adhesive, and transparent resin overlaid on the glass fine particles are used. A light reflector is shown.

In the light reflecting device described in the above-mentioned prior art, the fluorescent dye is not dispersed in the transparent resin for overcoating.

Further, conventionally, there has not been found any one using a transparent resin for coating an overcoat in which a fluorescent dye is dispersed.

[0005]

It is to be noted that an ordinary dye which is not a fluorescent dye is dispersed (referred to as a conventional type in the text), and a fluorescent dye is dispersed (referred to as a present application type in the text). .) Is compared in terms of visibility, as shown in Table 1.

[0006]

[Table 1] However, ⊚ is very clearly visible, ◯ is clearly visible, Δ is slightly visible, and x is not visible.

As is clear from the above comparison, the conventional type is inferior to the type of the present invention in visibility in early morning, morning, dusk, night (with streetlight), rainy weather and fog.

An object of the present invention is to provide a novel light reflecting device which is excellent in visibility in early morning, morning, dusk, night (with a street light), rainy weather and fog.

[0009]

To achieve the above object, a light reflecting device according to the present invention has a layer 3 containing transparent beads 2 such as glass beads held by a transparent resin adhesive 1 on a reflecting surface. In the light reflection device, a fluorescent transparent layer 6 obtained by dispersing a fluorescent dye 5 in a transparent resin 4 such as polymethylmethaacrylate, polycarbonate or polystyrene under specific constraint conditions is provided on the upper surface of the layer 3 containing the transparent beads 2. It is provided.

[0010]

As a function required for road markings, signs, indicating boards, advertisements, etc., visibility at night, evening, rainy weather and early morning is important. In order to make this visibility higher, the transparent beads 2 such as glass beads in the present invention exhibit retroreflectivity of light, and the fluorescent transparent layer 6 containing the fluorescent dye 5 allows the fluorescent dye to absorb light in a wide wavelength range. By converting these lights into wavelengths peculiar to the material, the retroreflected incident light and reflected light are converted twice to fluoresce.

[0011]

The light reflecting device according to the present invention comprises the transparent beads 2 such as glass beads held by the transparent resin adhesive 1.
In a light-reflecting device having an encapsulating layer 3 on a reflecting surface, a fluorescent dye 5 is dispersed on a transparent resin 4 such as polymethylmethacrylate, polycarbonate, or polystyrene under specific constraint conditions on the upper surface of the encasing layer 3 of transparent beads 2. By providing the fluorescent transparent layer 6 obtained by doing, early morning, morning, dusk,
At night (with a street light), in rainy weather and fog, the visibility of the transparent beads 2 such as glass beads is combined with the retroreflection function of the transparent beads 2 and the fluorescence function by the wavelength conversion performed twice in the incident light and the reflected light. Therefore, as is apparent from the comparison shown in Table 1 above, the effect is enhanced, and the remarkable effect of completely achieving the intended purpose of providing a light reflecting device having excellent visibility is achieved.

[0012]

EXAMPLE 1 In the first example shown in FIG. 1, a transparent resin adhesive 1 obtained by mixing glass beads 2 was applied to the upper surface of a highly reflective white soft synthetic resin sheet substrate 7 to be transparent. A layer 3 containing beads 2 is formed, and a polymethylmethacrylate resin 4 in which an orange fluorescent dye 5 is dispersed is applied on the upper surface of the layer 3 containing transparent beads 2 to form a fluorescent transparent layer 6 and a base material. The pressure sensitive adhesive 8 is applied to the back surface of the pressure sensitive adhesive 7 and the release sheet 9 is releasably attached to the pressure sensitive adhesive applied surface.

In the second embodiment shown in FIG. 2, a white line 11 is drawn at an appropriate place on the road surface 10, the transparent bead 2 containing layer 3 is placed on the white line 11, and the transparent bead 2 containing layer 3 is placed on the white line 11. The fluorescent transparent layers 6 are respectively laminated, and the lane marks 12 are displayed on the road surface 10.

The present invention is directed to a special fluorescent dye [Fluoresce-nce Orange 240, Re
d 300, Yellow 083, VL Highly Pure (Violet 570), Red
339, Violet 654] as the fluorescent dye 5, and instead of the polymethylmethacrylate resin 4, a transparent resin such as polycarbonate or polystyrene under specific constraint conditions, or other transparent resin is used. In addition, the color of the base material 7 can be the same color as the fluorescent dye 5 or a bright color, and a hard material can be used as the material of the base material 7, and the glass beads 2 can be made of transparent titanium. Sometimes I use beads.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment.

FIG. 2 is a sectional view showing a second embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Transparent resin adhesive 2 Beads 3 Beads-containing layer 4 Transparent resin 5 Fluorescent dye 6 Fluorescent transparent layer 7 Base material 8 Pressure-sensitive adhesive 9 Release sheet 10 Road surface 11 White line 12 Lane mark

Claims (1)

[Claims] 1. A light reflection device having a layer 3 containing transparent beads 2 such as glass beads held by a transparent resin adhesive 1 on a reflecting surface, wherein polymethylmethaacrylate is provided on an upper surface of the layer 3 containing transparent beads 2. , Polycarbonate or polystyrene under specific constraint conditions such as transparent resin 4 with fluorescent dye 5
1. A light reflecting device comprising a fluorescent transparent layer 6 obtained by dispersing