JPH0826088B2 - Light irradiation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a light source such as a light irradiation device used when light irradiation polymerization is performed to form an adhesive layer in the process of manufacturing an adhesive tape. The present invention relates to a light irradiation device for efficiently irradiating an object to be irradiated with light from the body.

[Prior Art] Conventionally, a light irradiation device of this type is arranged so as to face a light source body composed of a plurality of high-pressure mercury lamps and the like which are discretely arranged, and to oppose the light source body at a predetermined interval. An object to be irradiated such as a light-transmissive sheet substrate on which a coating portion for polymerization is formed.

Therefore, when the light from each light source body irradiates the object to be irradiated, the reflected light and the transmitted light from the object to be irradiated respectively pass through between the light source bodies and are scattered, or the anti-irradiation of the object to be irradiated. Scatter to the side.

[Problems to be Solved by the Invention] However, in such a configuration of the related art, since the reflected light and the transmitted light as described above are merely scattered light, it is not preferable in terms of light efficiency.

When the light source body has a reflection shade, a method of joining the ends of the adjacent reflection shades to each other is conceivable. However, in such a method, reflected light or the like is generated at the joining portion of the ends. Therefore, it cannot be said that the light efficiency has been improved sufficiently.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a light irradiation device capable of improving the light efficiency as much as possible with a simple structure in order to solve the above-mentioned problems of the conventional art.

[Means for Solving the Problem] In order to achieve the above-mentioned object, the present invention provides a light irradiation device in which a plurality of light source bodies discretely arrayed in a predetermined direction and an irradiation target object are arranged so as to face each other. In, in at least one of the space formed between the light sources and the non-irradiation side of the object to be irradiated, a light reflecting member having a reflection surface facing the object to be irradiated is provided. Characterize.

[Operation] When the light reflecting member is provided between the light source bodies, the reflected light from the irradiation target side is reflected by the reflecting surface of the first light reflecting member and irradiates the irradiation target again. Further, when the light reflecting member is provided on the side opposite to the light-transmitting object, the transmitted light of the object is reflected by the reflecting surface of the second light-reflecting member to irradiate the object. To do. Furthermore, when both the first and second light reflecting members are provided, the effective use of reflected light between the light source body and the irradiation target can be further sufficiently improved.

[Embodiment] FIG. 1 shows a first embodiment of the present invention. Above the inside of the irradiation chamber 7, for example, a high pressure mercury lamp 1 (having a reflection shade 2) as a light source is suitable. An appropriate number are provided at intervals. A flat plate-shaped auxiliary member serving as a first light reflecting member is provided between the end portions of adjacent reflection shades 2 and between the inner wall of the irradiation chamber 7 and the end portion of the reflection shade 2 adjacent to the inner wall. A reflector 3 is provided. The auxiliary reflector 3
Has a reflecting surface 3a formed at least on the lower side in the figure.
Here, the auxiliary reflection plate 3 is made of a stainless plate, for example, the reflection surface 3a of which is mirror-finished, and the light reflectance thereof is preferably about 90% or more. In addition to the stainless steel plate, an aluminum plate, a mirror surface glass plate or the like may be used.

On the other hand, in the lower part of the irradiation chamber 7, a slit-shaped carry-in port 4 is formed on the left side wall in the figure, and a slit-shaped carry-out port 5 is also formed on the right side wall thereof. An irradiation target carried in from 4, for example, a sheet base material 6 of an adhesive tape is carried out from a carry-out port 5. The sheet base material 6 is
For example, it is formed by coating a photopolymerizable monomer liquid on a release paper which is provided on a white high-quality paper and which has been treated with a silicone release agent.

Since the present embodiment is configured as described above, the irradiation light from the mercury lamp 1 reaches the upper surface of the sheet base material 6 directly and after being reflected by the reflection shade 2 while the sheet base material 6 is being reflected.
The reflected light of the irradiation light reflected on the upper surface of the is mainly reflected by the reflection surface 3a of the auxiliary reflection plate 3 and reaches the sheet base material 6 again, so that the light from the light source body is efficiently photopolymerized in the coating section. In order to do so, the upper surface of the sheet base material 6 is irradiated. Therefore, in order to obtain the same photopolymerized material, one having a light output smaller than that of the conventional light source can be used.

FIG. 2 shows a second embodiment, which is provided, for example, on a transparent polyethylene terephthalate film,
A lower reflection plate 8 as a second light reflection member is provided in the irradiation chamber 7 on the lower surface side of a sheet base material 6'formed by coating a photopolymerizable monomer liquid on a release film treated with a silicone release agent. It is supported between the side walls of the.

The light source bodies 1 above the irradiation chamber 7 are discretely arranged in the left-right direction in the figure. The rest of the configuration is similar to that of the first embodiment described above and will not be described.

The lower reflector 8 is made of, for example, stainless steel,
It is desirable that the upper surface side, that is, the surface side facing the sheet base material 6 is mirror-finished, and the light reflectance is about 90% or more.

Since the second embodiment is configured as described above, the irradiation light from each mercury lamp 1 irradiates the upper surface of the sheet base material 6'and then passes through the sheet base material 6 ', but is reflected by the lower portion. Board 8
The light from the light source efficiently irradiates the sheet base material 6 ', such as being reflected by the reflection surface 8a of the above and irradiating the sheet base material 6'with the reflected light again. Therefore, similar to the first embodiment, the light output of the light source body required to obtain the same photopolymerized material can be reduced as compared with that without the reflection plate 8.

In this case, the coated portion of the sheet base material 6'is irradiated with the direct light from the mercury lamp 1 from above and the reflected light from the lower reflection plate 8 from below, so that the photopolymerization of the coated portion is uniform. Has the advantage that

FIG. 3 shows a third embodiment of the present invention, in which an auxiliary reflector 3 similar to that of the first embodiment is provided and a lower reflector 8 similar to that of the second embodiment is provided. It is a thing. The other structure is similar to that of the second embodiment, and the description thereof is omitted.

Since the present embodiment is configured as described above, the light from the light source illuminates the upper surface of the sheet base material 6 ', and the reflecting surface 3a of the auxiliary reflecting plate 3 and the reflecting surface 8a of the lower reflecting plate 8 are used. As compared with the case of the above first and second embodiments, the irradiation light more effectively and efficiently irradiates the upper surface of the sheet base material 6 '.

In the case of the third embodiment as well, as in the case of the second embodiment, the coated portion of the sheet base material 6'has direct light and reflected light from above from the mercury lamp 1 and the auxiliary reflection plate 3, Since the light is irradiated by the light reflected from the lower reflection plate 8 from below, there is an advantage that the photopolymerization of the coated portion is uniformly performed.

[Advantages of the Invention] As described above, according to the present invention, in the light irradiation device in which a plurality of light source bodies discretely arrayed in a predetermined direction and an irradiation target object are arranged to face each other, At least one of the space formed between the light source and the non-irradiation side of the object to be irradiated is provided with a light reflecting member having a reflecting surface facing the object to be irradiated. Not only the direct light from the light source body, but also the reflected light or transmitted light of the object to be irradiated can contribute to the irradiation, so that the light efficiency can be improved, and particularly, it can be applied to the photopolymerization of the sheet-like body. It is useful.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view showing a first embodiment of the present invention, FIG. 2 is a side sectional view showing a second embodiment, and FIG. 3 is a side sectional view showing a third embodiment. It is a figure. 1 ... Mercury lamp (light source), 3 ... Auxiliary reflector (first light reflecting member), 3a ... Reflecting surface, 8 ... Lower reflector (second light reflecting member), 8a ... Reflecting surface .

Claims (1)

[Claims] 1. A light irradiation device comprising a plurality of light source bodies, which are discretely arranged in a predetermined direction, and an object to be irradiated so as to face each other, and a space portion formed between the respective light source bodies. A light irradiating device comprising a light reflecting member having a reflecting surface facing the object to be irradiated, which is provided on at least one side of the object to be irradiated.