JP2602087Y2 - UV irradiation device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention is to apply an ultraviolet curing resin (coating material) to a striated body such as an optical fiber, a wire or an electric wire, and then irradiate the applied surface with ultraviolet rays to cure the wire. Form a resin film on the surface of the striated body, thereby reinforcing the striated body, shock buffering, protection, marking, relates to an ultraviolet irradiation device used when performing colored coating, etc.
In particular, wavelengths of 900 to 11
Eliminates the red light of 00nm, selectively focuses only the ultraviolet light of wavelength 200-450nm and irradiates it to the striatum, prevents the temperature rise by infrared light and prevents the coating material from evaporating. It relates to an ultraviolet irradiation device to be obtained.

[0002]

2. Description of the Related Art Generally, a resin film is formed on a surface of a striated body such as an optical fiber, a wire, and an electric wire for the purpose of reinforcing, shock-absorbing, protecting, marking, coloring and the like. When forming this kind of resin film, first, an ultraviolet curable resin (coating material) is applied to the surface of the striated body, and then the coated surface is irradiated with ultraviolet light to cure the coating material. You.

Conventionally, as an ultraviolet irradiation apparatus used for the above-mentioned irradiation, an ultraviolet light source, a tube member arranged near the light source and having a striatum running inside, and both of the light source and the tube member are opposed to each other. An ultraviolet reflecting mirror that reflects light from the light source on a mirror surface and condenses the light on the striatum, wherein the tube is made of quartz, and the reflecting mirror is made of a metal such as aluminum. Are known.

[0004]

The ultraviolet rays generated from the ultraviolet light source usually include light rays in a wavelength range other than the ultraviolet rays, such as infrared rays. When the striatum is irradiated with light other than these ultraviolet rays, especially in the case of infrared rays having a wavelength of 900 to 1100 nm, the temperature of the striatum increases, and therefore, the coating material applied to the striatum Evaporates and adheres to the inner wall of the tube material. As a result, the wall surface of the tube material is fogged and the transmission of ultraviolet rays is remarkably prevented, so that it is difficult to produce a stable filament.

In the above-mentioned known ultraviolet irradiating apparatus, the ultraviolet ray generated from the ultraviolet light source is reflected by the mirror surface of the ultraviolet reflecting mirror as it is, and is condensed on the striated body running inside the tube, and the surface of the striated body is exposed. Irradiates the surface of the striatum due to the infrared rays contained in the light, and as a result,
The coating material applied to the surface of the striatum evaporates.

In order to solve this drawback, conventionally, in the above-described ultraviolet irradiation apparatus, an ultraviolet reflecting mirror is a filter that reflects or transmits only ultraviolet rays and transmits or absorbs infrared rays, or an infrared ray that transmits only the ultraviolet rays through the tube material and emits infrared rays. An apparatus has been developed as a filter that reflects light.

[0007] In the former device, of the light emitted from the ultraviolet light source that reaches the ultraviolet reflecting mirror, the infrared light contained therein is emitted to the outside or absorbed by the reflecting mirror. However, some reach the striatum directly through the tubing, in which case the striatum causes a temperature rise by infrared radiation.

Further, in the latter device, since light is incident on the tube at an angle close to the vertical, it is difficult to reflect only infrared rays, and all the light is transmitted, so that the temperature of the striatum increases.

Accordingly, an object of the present invention is to eliminate red light having a wavelength of 900 to 1100 nm from light emitted from an ultraviolet light source, and selectively focus only ultraviolet light having a wavelength of 200 to 450 nm on the striatum. It is an object of the present invention to provide an ultraviolet irradiation apparatus which can prevent the coating material from evaporating by irradiating and preventing the temperature rise due to the infrared light, thereby improving the disadvantages of the above-mentioned known technique.

[0010]

According to the present invention, in order to achieve the above-mentioned object, an ultraviolet light source, a tube member disposed near the light source and having a striated body running therein, and a mirror surface are provided. An ultraviolet reflecting mirror composed of an elliptical cylindrical body that is arranged to face both the light source and the tube member , reflects light from the light source on the mirror surface, and condenses the light on the striatum .
In the ultraviolet irradiation device, the tube material is based on a light-transmitting tube , an inert gas is introduced into the tube , and a first layer of zirconium oxide is vapor-deposited on the outer surface of the substrate. And depositing a second layer of silicon oxide thereon , and repeating these depositions to form a multilayer film having a thickness of 10 to 20 layers and a thickness of 1.0 to 1.8 microns or a thickness of 25 to 40 layers of 2.3 to 3.0 microns. forming a result in the ultraviolet reflector a light transmitting plate member as a base material, the mirror side of the substrate by repeating the same deposition as described above the thickness at 50 to 70 layers of 2.0 to 2.2 it forms a micron multilayer film, thereby the multilayer film of the ultraviolet reflector wavelength from the ultraviolet light source 200 to 450
nm light and a wavelength of 900 to 1100 n
m and transmits or absorbs light, and the multilayer film of the tube material transmits light having a wavelength of 200 to 450 nm and reflects light having a wavelength of 900 to 1100 nm. As a result, only ultraviolet rays are emitted to the surface of the striatum. The irradiation is selectively performed through the tube.

[0011]

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic perspective view of a specific example of the ultraviolet irradiation apparatus according to the present invention, FIG. 2 is a partial cross-sectional view of the apparatus of FIG. 1, and FIG. FIG. 4 is a schematic diagram of a device for measuring the temperature of the striatum, and FIG. 5 is a graph showing the result of temperature measurement on the surface of the striatum.

The device A of the present invention is basically similar to that of FIGS.
As shown in FIG. 1, an ultraviolet light source 1 such as a UV lamp, a tube member 3 in which a striated body 2 travels, and an ultraviolet reflecting mirror 5 having a mirror surface 4 are provided.

The tube 3 is arranged near the ultraviolet light source 1, and the ultraviolet reflecting mirror 5 is arranged so that the mirror surface 4 faces both the light source 1 and the tube 3. For example,
As shown in FIG. 2, the ultraviolet reflecting mirror 5 is composed of an elliptical cylindrical body having a mirror surface 4 inside, and the ultraviolet light source 1 is located near one focal point of the ellipse and the tube 3 is located near the other focal point. The tube 3 is arranged near the ultraviolet light source 1, and the ultraviolet reflecting mirror 5 is arranged such that the mirror surface 4 faces both the light source 1 and the tube 3. Placed in

The tube material 3 is based on a light-transmitting tube 6 made of quartz glass, sapphire or the like, and has a multilayer film 7 on its outer surface.
Is formed. The multilayer film 7 is formed by depositing a first layer of zirconium oxide on the outer surface, further depositing a second layer of silicon oxide thereon, and repeating these depositions.
Form a multilayer film with a thickness of 10-20 layers 1.0-1.8 microns, preferably 15 layers 1.2 microns, or 25-40 layers 2.3-3.0 microns, preferably 30 layers 2.4 microns thick It can be obtained by:

Further, the ultraviolet reflecting mirror 5 is constituted by using a light transmitting plate 8 made of quartz glass, Pyrex glass or the like as a base material, and forming a multilayer film 9 on the mirror surface 4 side of the plate 8. This multilayer film 9 is also formed on the mirror surface 4 side by repeating the same vapor deposition as described above to form a multilayer film having a thickness of 50 to 70 layers of 2.0 to 2.2 microns, preferably 50 to 60 layers of 2.0 to 2.2 microns. It can be obtained by:

The multilayer film 9 of the above-mentioned ultraviolet reflecting mirror 5 reflects light having a wavelength of 200 to 450 nm, particularly 300 to 400 nm from the ultraviolet light source 1, and transmits or absorbs light having a wavelength of 900 to 1100 nm. The multilayer film 7 has a wavelength of 200 to 450 n.
m, in particular, transmits or absorbs light having a wavelength of 300 to 400 nm, and reflects light having a wavelength of 900 to 1100 nm.

In addition, an inert gas such as nitrogen gas is applied to the above-mentioned pipe member 3 in a direction opposite to the running direction of the filament 2, for example.
It may be introduced at a flow rate of 30 l / min.
Can be lowered by several degrees Celsius.

[0018]

In the apparatus A of the present invention having the above-described structure, as shown in FIG. 3, first, the light beam a generated from the ultraviolet light source 1 is reflected by the multilayer film 9 of the ultraviolet reflecting mirror 5 or directly into the tube material. 3 reach the multilayer film 7. The multilayer film 9 reflects only the ultraviolet light b having a wavelength of 200 to 450 nm contained in the light ray a and converges it on the multilayer film 7 of the tube material 3.
Transmits or absorbs 100 nm infrared light.

The multilayer film 7 transmits the ultraviolet rays b having a wavelength of 200 to 450 nm out of the light rays a directly arriving from the ultraviolet light source 1 and condenses them on the striatum 2, and reflects the infrared rays having a wavelength of 900 to 1100 nm. Excluded and wavelength reflected by the multilayer film 9
While transmitting ultraviolet rays b having a wavelength of 200 to 450 nm and condensing it on the striatum 2, the remaining infrared rays having a wavelength of 900 to 1100 nm are reflected and eliminated. As a result, only the ultraviolet rays b are selectively irradiated to the surface of the striated body 2 through the tube material 3, and the ultraviolet curable resin (coating material) applied to the surface of the striated body 2 is cured to cure the striated body 2. A resin film is formed on the surface. At this time, the rays irradiated to the striated body 2 are only the ultraviolet rays b, and the infrared rays are excluded, so that the temperature of the striated body 2 does not rise and the coating material can be prevented from evaporating.

[0020]

As shown in FIG. 4, an optical fiber (striated body) 2 used for an optical cable for communication is inserted into a tube 3 of a device A of the present invention having the structure shown in FIG. The temperature of the optical fiber 2 was measured by an infrared radiation thermometer 10 at a point 1 m below A. Optical fiber 2 is 125μ
A glass fiber of mφ coated with a urethane acrylate resin to a thickness of 400 μmφ was used.

Further, in the device of the present invention shown in FIG.
Nitrogen gas (N ₂ gas) is introduced into the pipe member 3 at a flow rate of 30 l / min in a direction opposite to the traveling direction (arrow) of the optical fiber 2,
The same temperature measurement as described above was performed.

On the other hand, in the layout shown in FIG. 4, instead of the device A of the present invention, a device (conventional device A) composed of an aluminum ultraviolet reflecting mirror and a quartz tube (not shown) instead of the device A, transmits ultraviolet rays as the tube, Using a filter that reflects infrared light, an ultraviolet reflecting mirror using a device similar to the above-described device A (conventional device B), and a filter that reflects ultraviolet light as an ultraviolet reflecting mirror and transmits and absorbs infrared light. The same temperature measurement as described above was performed using a device using the same device as the device A (conventional device C).

Each of the above temperature measurements is performed by
The measurement was performed by changing the traveling speed of the optical fiber 2 between 2 and 8 m / sec and measuring the surface temperature of the optical fiber 2, and the results are shown in FIG.

The symbols in FIG. 5 are the measurement results of the following apparatus. ▲: Conventional device A ■: Conventional device B ×: Conventional device C ○: Device of the present invention shown in FIG. 4 ●: Device of the present invention shown in FIG. 4 when N ₂ gas is introduced into the pipe material

FIG. 5 shows that the conventional apparatuses B and C cause a temperature drop of several degrees to 20 ° C. respectively in comparison with the conventional apparatus A, but the apparatus of the present invention causes a temperature drop of about 50 ° C. It can be seen that the temperature of the device of the present invention using N ₂ gas is several degrees lower than that of the device without using N ₂ gas.

In FIG. 5, as the running speed of the optical fiber 2 increases, the degree of decrease in temperature decreases. The reason for this is that the cooling time required for the optical fiber 2 to leave the above-described devices and reach the measurement point is shortened.

[0027]

[Effects of the Invention] As described above, the device of the present invention applies an ultraviolet curable resin (coating material) to a striated body such as an optical fiber, a wire, or an electric wire, and then irradiates the applied surface with ultraviolet light to cure. Forming a resin film on the surface of the striatum, thereby reinforcing, impact-buffering, protecting, marking, coloring, etc. the striatum; Eliminates red light at 1100 nm, selectively focuses only ultraviolet light with a wavelength of 200 to 450 nm and irradiates it to the striatum, preventing temperature rise due to infrared light and preventing evaporation of the coating material. This is a practically useful device.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a specific example of an ultraviolet irradiation device according to the present invention.

FIG. 2 is a partial cross-sectional view of the device of FIG.

FIG. 3 is an explanatory view showing the state of reflection and transmission of ultraviolet light of the device according to the present invention.

FIG. 4 is a schematic diagram of an apparatus for measuring the temperature of a striatum.

FIG. 5 is a graph showing the results of temperature measurement on the surface of the striatum.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ultraviolet light source 2 Striatal body 3 Tube material 4 Mirror surface 5 Ultraviolet reflecting mirror 6 Light transmissive tube 7 Multilayer film 8 Light transmissive plate body 9 Multilayer film A

Continuation of front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B01J 19/12

Claims (3)

(57) [Scope of request for utility model registration] 1. An ultraviolet light source, a tube member disposed in the vicinity of the light source, in which a striatum travels, and a mirror surface disposed so as to face both the light source and the tube member. Is reflected by this mirror surface and condensed on the striatum
UV irradiation with an ultraviolet reflector consisting of an elliptical cylinder
In the device, the tube material the light transmitting tube body as a base material, this
An inert gas is introduced into the inside of the substrate , and a first layer of zirconium oxide is deposited on the outer surface of the substrate , and a second layer of silicon oxide is further deposited thereon . 20 layers with a thickness of 1.0-1.8 microns or
A multilayer film having a thickness of 2.3 to 3.0 μm is formed by 25 to 40 layers, and the ultraviolet reflecting mirror is made of a light-transmitting plate as a base material. Repeat deposition becomes to form a multilayer film having a thickness of 2.0 to 2.2 microns in 50 to 70 layers, thereby the multilayer film of the ultraviolet reflector light with a wavelength 200~450nm from the ultraviolet light source It reflects, transmits or absorbs light having a wavelength of 900 to 1100 nm, and the multilayer film of the tube material has a wavelength of 200 to 1100 nm.
４５０450 nm and a wavelength of 900 to 1
Reflecting light 100 nm, as a result, ultraviolet irradiation apparatus, wherein only ultraviolet to the surface of the striatum selectively irradiated through the tubing. 2. The ultraviolet irradiation apparatus according to claim 1, wherein said light-transmitting tube is made of quartz glass or sour. 3. The ultraviolet irradiation apparatus according to claim 1, wherein said light transmitting plate is made of quartz glass or Pyrex.