JPH023704B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a luminescent wire that stores luminescence when irradiated with light and emits light to such an extent that it can be clearly recognized in a dark place after irradiation is stopped.

Known phosphorescent fine particles that emit phosphorescence with luminous properties and high visibility, such as zinc sulfide phosphor (ZnS:Cu) containing a trace amount of copper as an activator.
On the other hand, it has poor water resistance, oxidation resistance, and ultraviolet resistance, and must be handled with care, so its range of use has traditionally been narrow, and its uses have been limited to watch dials, scales and hands of various instruments, and It was limited to display memory, etc.

The present invention has been made in order to expand the scope of use of phosphorescent fine particles that have poor water resistance, oxidation resistance, and ultraviolet resistance. The gist of this invention is that the light-emitting bodies formed by layers are scattered in the coating layer of a wire whose core wire is coated with a synthetic resin coating layer.

To explain the luminous body used in the luminescent wire of the present invention, as illustrated in FIG. 12 is applied. In the illustrated example, as is clear from FIG.
1 may have any other shape, such as a sphere or a flake pellet. Phosphorescent fine particles 1
As a representative example of No. 1, there is the above-mentioned ZnS:Cu.
Further, the phosphorescent fine particles 11 having a particle size of 5 to 100 μm can be suitably used. Next, the protective layer 12 made of transparent synthetic resin is a protective layer made of transparent synthetic resin, and this protective layer 12 is applied so as to completely encapsulate the phosphorescent fine particles 11. It requires that. As the transparent synthetic resin, polymethyl methacrylate (MMA), polycarbonate (PC), polystyrene, polyester, polyethylene terrectate (PET), polyvinyl chloride, etc. can be used. Some of these synthetic resins have UV absorbing ability themselves, but in many cases, the UV light passes through the resin, so other known UV absorbers are used to complete the UV absorbing ability. Add and use.

The light emitter 10 described above includes phosphorescent fine particles 11
Depending on its characteristics, it accumulates light when irradiated with light, and emits phosphorescence with high visibility after irradiation is stopped. Since the phosphorescent fine particles 11 are completely sealed by the protective layer 12, contact with moisture such as air and moisture is effectively cut off. Therefore, even if the phosphorescent fine particles 11 themselves have poor water resistance and oxidation resistance, their properties such as phosphorescence and light emission will not deteriorate when the phosphorescent fine particles 11 are eroded by water or oxidized. do not have. Further, since the protective layer 12 is made of a transparent synthetic resin having ultraviolet absorbing ability such as MMA, the influence of ultraviolet rays on the phosphorescent fine particles 11 can be completely avoided. Therefore, the characteristics of the phosphorescent fine particles 11 such as phosphorescence and light emission are not deteriorated by the influence of ultraviolet rays.

As described above, the luminescent material according to the present invention is easy to handle because the properties of the phosphorescent fine particles that are its constituent elements, such as luminescence and luminescence, can be maintained semi-permanently regardless of external conditions. At the same time, the range of applications of phosphorescent fine particles can be dramatically expanded.

For example, to make the existence of partition fences built around airports, steel movable pavement, highway median strips and side fences, hazardous materials storage areas of chemical plants, and other restricted areas clearly visible even at night. It becomes possible to use it. Next, the wire rod 1 of the embodiment shown in FIG. 3 will be explained. That is, the above-mentioned light emitter 1
If the wire rod 1 made of 0 is scattered around the outer periphery is knitted into a net and used as the partition fence, the partition fence will be able to absorb the phosphorescent fine particles 11 (see FIGS. 1 and 2) of the luminescent body 10. Depending on its characteristics, it accumulates and emits light when illuminated by a car's headlights, so its presence can be clearly recognized. In this case, since the entire partition shelf emits light, it is extremely effective in attracting attention compared to those that partially emit light by installing illumination lights, luminous display boards, signs, etc.

In addition, the wire rod for knitting the above-mentioned partition fence is a core wire 2 made of a steel pipe as illustrated in FIG.
When the core wire 2 is coated with a synthetic resin coating layer 3 to prevent rusting, the luminous bodies 10 are scattered on the coating layer 3. Incidentally, as shown in FIG. 5, the light emitters 10 are scattered around the entire circumference of the coating layer 3, but the density in the scattered state is set to a predetermined value as necessary.

Next, an example of a method for manufacturing a light emitting body will be explained. First, phosphorescent fine particles are sequentially fed out linearly from the center of a continuous extrusion die, and at the same time, a molten transparent synthetic resin is extruded around them. As a result, the light emitting body 10 shown in FIG. 6A is obtained. The luminescent body 10 thus obtained is an elongated one in which a linear core layer 111 made of phosphorescent fine particles 11 is covered with a protective layer 12 made of a transparent synthetic resin. It is possible to use such a long light emitting body 10 as it is for various purposes. This wire rod 10 is divided,
A large number of short pieces 10a shown in FIG. If , the core layer 11
A capsule-shaped light emitting body 1 on which a protective layer 12 is applied
0 is obtained.

The following method may be used to obtain the wire rod 1 explained in FIGS. 3 to 5 using the capsule-shaped light emitting body 10 shown in FIG. 6C.

For example, while feeding out the core material 2 coated with the coating layer 3 from the center of a die for continuous extrusion molding, the luminous body 10 is continuously supplied around the core material 2, and the coating layer 3 and the protective layer 12 of the luminous body 10 are coated. Either heat weld them together or bond them together with an adhesive.

In addition, as another method, the luminous body 10 is sprayed around the coating layer 3 coated with adhesive, and the luminous body 10 is
It is also possible to attract and adhere 0 to the coating layer 3 by electrostatic force.

As is clear from the above description, in the luminescent wire according to the present invention, luminescent bodies made of phosphorescent fine particles covered with a protective layer made of a transparent synthetic resin having ultraviolet absorbing ability are scattered in the coating layer of the wire. Even though the phosphorescent particles themselves have poor water resistance, oxidation resistance, and ultraviolet ray resistance, the phosphorescent particles are not affected by air, moisture, ultraviolet rays, etc., and therefore the phosphorescent particles do not store or emit light. We now provide a wire that can be connected semi-permanently even under harsh external conditions, and that stores luminescence when irradiated with light and emits light to the extent that it can be clearly seen in the dark after irradiation is stopped. It becomes possible to do so.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a light emitting body according to an embodiment of the present invention;
2 is a sectional view taken along the line X-X in FIG. Figure 5 is the fourth
A sectional view taken along the line Y--Y in the figure, and FIGS. 6A, 6B, and 6C are explanatory diagrams showing an example of the method for manufacturing the light emitting body. 10... Luminous body, 11... Phosphorescent fine particles, 12
...protective layer.

Claims (1)

[Claims] 1. A luminescent material made of phosphorescent fine particles coated with a protective layer of transparent synthetic resin having ultraviolet absorption ability is scattered in the coating layer of a wire whose core wire is covered with a synthetic resin coating layer. Luminescent wire.