JP3570185B2 - Manufacturing method of straight tube fluorescent lamp - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for manufacturing a straight fluorescent lamp with a photocatalyst in which a photocatalytic film is formed on the surface of a straight glass tube.
[0002]
[Prior art]
Recently, a fluorescent lamp with a photocatalyst in which a photocatalyst film is formed on the outer surface of a fluorescent lamp has been considered. In the fluorescent lamp with a photocatalyst, since the photocatalyst film decomposes organic substances, the outer surface of the glass tube is generally prevented from being stained. Therefore, it is possible to prevent the brightness of the fluorescent lamp with a photocatalyst from being lowered, and it has a photocatalytic effect such as deodorization and antibacterial.
[0003]
Conventionally, to form a photocatalyst film on the outer surface of the glass tube of a fluorescent lamp with a photocatalyst, the glass tube is immersed in a dipping tank containing the photocatalyst solution and pulled up to apply the photocatalyst solution to the outer surface of the glass tube After that, it is fired.
[0004]
[Problems to be solved by the invention]
However, in such a light source with a photocatalyst, since the surface of the photocatalyst film becomes flat, the surface area of the photocatalyst film is small, and the photocatalytic effect such as antifouling of the photocatalyst film is low.
[0005]
The present invention has been made to solve the above-described problems, and has as its object to provide a method of manufacturing a straight tube fluorescent lamp in which a photocatalytic film has a high photocatalytic effect.
[0006]
[Means for Solving the Problems]
In order to achieve this object, the present invention provides a method for manufacturing a straight tube fluorescent lamp in which a photocatalytic film is provided on the outer surface of a straight tube glass tube. While moving in the direction of the central axis of the tube, spray the photocatalyst chemical solution from the spray nozzle onto the glass tube, so that the applied amount of the photocatalyst solution sprayed from the spray nozzle is larger than the surrounding applied amount. After applying the photocatalyst chemical to the outer surface of the glass tube, baking the photocatalytic chemical to form the photocatalyst film on the outer surface of the glass tube, so that the surface of the photocatalyst film has irregularities. The difference between the maximum value and the minimum value of the thickness of the photocatalytic film is set to 50 to 900 nm, and the thickness of the photocatalytic film is set to 100 nm or more.
[0007]
Further, in the method for manufacturing a straight tube type fluorescent lamp in which a photocatalytic film is provided on the outer surface of a straight tube glass tube, the glass tube is rotated and a spray nozzle is moved from a first end of the glass tube to a second end. After moving the spray nozzle from the second end of the glass tube to the first end, spraying a photocatalytic chemical solution from the spray nozzle onto the glass tube, In such a manner that the applied amount of the central portion of the photocatalytic chemical sprayed from the nozzle is larger than the peripheral applied amount, and after the photocatalytic chemical is applied to the outer surface of the glass tube, the photocatalytic chemical is fired, By forming the photocatalytic film on the outer surface of the glass tube, irregularities are provided on the surface of the photocatalytic film, and the difference between the maximum value and the minimum value of the thickness of the photocatalytic film is 50 to 900 nm. And, the above 100nm thickness of the photocatalyst film.
[0008]
In these cases , a titanium sol containing a titanium organic compound, an acid, water and an alcohol is used as the photocatalytic chemical solution.
[0009]
In addition, a titania sol containing fine particles of titanium oxide crystals, acid, water, and alcohol is used as the photocatalyst solution.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a sectional view showing a part of a straight tube fluorescent lamp manufactured by the method for manufacturing a straight tube fluorescent lamp according to the present invention. As shown in the figure, a photocatalyst film 2 made of titanium oxide is provided on the outer surface of a glass tube 1, irregularities are provided on the surface of the photocatalyst film 2, and the maximum value and the minimum value of the film thickness of the photocatalyst film 2 are determined. The difference, that is, the thickness difference Δt is 50 to 100 nm, and the minimum thickness t _min of the photocatalyst film 2 is 110 nm.
[0011]
In this straight tube fluorescent lamp , since the surface of the photocatalyst film 2 is provided with irregularities, the surface area of the photocatalyst film 2 is large, so that the photocatalytic film 2 has high photocatalytic effects such as antifouling, deodorization, antibacterial, and sterilization. . Then, since the thickness difference Δt of the photocatalyst film 2 is 50 nm or more, the surface area of the photocatalyst film 2 becomes larger. Further, since the thickness difference Δt of the photocatalyst film 2 is 100 nm or less, fabrication is easy. Further, since the minimum thickness t _min of the photocatalyst film 2 is 110 nm, the photocatalytic effect of the photocatalyst film 2 such as antifouling, deodorization, antibacterial, and sterilization is further enhanced.
[0012]
FIG. 2 is a graph showing a temporal change in the residual ratio of acetaldehyde when 10 ppm of acetaldehyde is sealed in a closed box, and a line a is manufactured in the closed box by the method for manufacturing a straight tube fluorescent lamp according to the present invention . Line b indicates the case where a straight tube fluorescent lamp is inserted, and line b indicates the case where a conventional fluorescent lamp with a photocatalyst is inserted. As is clear from this graph, the acetaldehyde removal rate of the straight tube fluorescent lamp manufactured by the method for manufacturing a straight tube fluorescent lamp according to the present invention is better than that of the conventional fluorescent lamp with a photocatalyst.
[0013]
Next, a method for manufacturing the straight tube fluorescent lamp according to the present invention will be described with reference to FIG. In this production method, first, a titanium sol containing a titanium organic compound, an acid, water and an alcohol is prepared as a photocatalytic chemical solution. Next, while rotating the straight glass tube 1 and moving the spray nozzle 11 to the center axis direction of the glass tube, that is, rightward in FIG. The photocatalyst solution 12 is applied to the outer surface of the tube 1. In this case, the diameter of the droplet of the photocatalytic chemical sprayed from the spray nozzle 11 is set to 5 to 30 μm. Next, the photocatalyst solution 12 applied to the outer surface of the glass tube 1 is fired at 500 ° C. to form the photocatalyst film 2.
[0014]
In this method for manufacturing a straight tube fluorescent lamp, the photocatalyst solution 12 can be applied in a macroscopic manner in a spiral manner, so that the surface of the photocatalyst film 2 can be easily provided with irregularities. That is, as shown in FIG. 4, when the spray nozzle 11 is stopped and the photocatalyst solution 12 is applied, the applied amount of the photocatalyst solution 12 at the center increases, so if the moving speed of the spray nozzle 11 is adjusted, The photocatalyst film 2 as shown in FIG. 1 can be formed. Microscopically, since a titanium sol containing a titanium organic compound, an acid, water and an alcohol is used as the photocatalyst chemical solution 12, when the photocatalyst chemical solution 12 is applied by spraying, the photocatalyst film 2 is fixed without a binder. Since the photocatalyst film 2 is formed in a state where the flaky particles of titanium oxide overlap, the surface of the photocatalyst film 2 is provided with irregularities. Therefore, since the surface area of the photocatalyst film 2 is increased, the photocatalytic effect of the photocatalyst film 2 such as antifouling, deodorization, antibacterial, and sterilization is further improved. Further, in the reflection of the photocatalyst film 2, microscopic interference occurs with each flake-like particle of titanium oxide, and the reflected light from the photocatalyst film 2 becomes scattered light as a whole. Since the interference color hardly occurs, the original color of the phosphor does not shift, and it is easy to control the light color to be constant.
[0015]
Next, a method for manufacturing another straight tube type fluorescent lamp according to the present invention will be described with reference to FIG. In this production method, first, a titanium sol containing a titanium organic compound, an acid, water and an alcohol is prepared as a photocatalytic chemical solution. Next, while rotating the glass tube 1 and moving the spray nozzle 11 in the direction of the central axis of the glass tube, a photocatalytic solution is sprayed from the spray nozzle 11 onto the glass tube 1, and the photocatalytic solution 12 is applied to the outer surface of the glass tube 1. Is applied. In this case, the diameter of the droplet of the photocatalytic chemical sprayed from the spray nozzle 11 is set to 5 to 30 μm. Further, after the spray nozzle 11 is moved from the first end of the glass tube 1, that is, the left end in FIG. 5 to the second end, that is, the right end in FIG. 5, the first coating is performed. The second application is performed by moving the spray nozzle 11 from the second end of the glass tube to the first end. Next, the photocatalyst solution 12 applied to the outer surface of the glass tube 1 is fired at 500 ° C. to form the photocatalyst film 2.
[0016]
In the method of manufacturing the straight tube type fluorescent lamp , the spray nozzle 11 is moved in a direction opposite to the first application in the case of the second application, so that the trajectories of the application of the photocatalyst chemical liquid 12 cross each other and are crossed. As a result, irregularities can be easily formed on the surface of the photocatalytic film 2.
[0017]
In the above-described embodiment, the thickness difference Δt is set to 50 to 100 nm. However, if the thickness difference Δt is set to 50 to 900 nm, the surface area of the photocatalyst film becomes larger, and the fabrication is easy. In the above-described embodiment, the minimum thickness t _min of the photocatalyst film 2 is set to 110 nm. However, if the minimum thickness t _min of the photocatalyst film 2 is set to 100 nm, antifouling, deodorization, antibacterial, The photocatalytic effect such as sterilization becomes higher. In the above-described embodiment, a titanium sol containing a titanium organic compound, an acid, water, and an alcohol is used as the photocatalyst solution 12, but a titania sol containing fine particles of titanium oxide crystals, an acid, water, and an alcohol is used as the photocatalyst solution. May be used.
[0018]
【The invention's effect】
In the method for manufacturing a straight tube fluorescent lamp according to the present invention , since the photocatalytic chemical solution can be applied spirally, irregularities can be easily provided on the surface of the photocatalytic film, and the surface area of the photocatalytic film is large. The photocatalytic film has a high photocatalytic effect, and the difference between the maximum value and the minimum value of the thickness of the photocatalytic film is 50 to 900 nm, so that the surface area of the photocatalytic film is increased and the production is easy. Since the thickness of the film is 100 nm or more, the photocatalytic effect of the photocatalytic film becomes higher.
[0019]
When the spray nozzle is moved from the first end to the second end of the glass tube after the spray nozzle is moved from the first end to the second end of the glass tube, the application of the photocatalytic chemical solution is performed when the spray nozzle is moved from the second end to the first end of the glass tube. Are intersected with each other, so that unevenness can be easily formed on the surface of the photocatalytic film.
[0020]
Further, when a titanium sol containing a titanium organic compound, an acid, water and an alcohol is used as the photocatalyst chemical solution, the surface area of the photocatalyst film becomes larger, so that the photocatalytic effect of the photocatalyst film becomes higher and the light reflected from the photocatalyst film becomes higher. Is scattered light as a whole, so that it is easy to control the light color to be constant.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a part of a straight tube fluorescent lamp manufactured by a method of manufacturing a straight tube fluorescent lamp according to the present invention.
FIG. 2 is a graph showing a temporal change of a residual ratio of acetaldehyde.
FIG. 3 is an explanatory diagram of a method of manufacturing a straight tube fluorescent lamp according to the present invention.
FIG. 4 is an explanatory diagram of an effect of the method of manufacturing the straight tube fluorescent lamp described with reference to FIG. 3;
FIG. 5 is an explanatory diagram of a method of manufacturing another straight tube fluorescent lamp according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Glass tube 2 ... Photocatalyst film 11 ... Spray nozzle 12 ... Photocatalytic chemical

Claims (4)

In a method for manufacturing a straight tube fluorescent lamp in which a photocatalytic film is provided on an outer surface of a straight tube glass tube, the spraying is performed while rotating the glass tube and moving a spray nozzle in a central axis direction of the glass tube. Spraying the photocatalyst solution from the nozzle onto the glass tube, so that the amount of application of the photocatalyst solution sprayed from the spray nozzle at the center is greater than the amount of application at the periphery, and the photocatalyst is applied to the outer surface of the glass tube. After applying a chemical solution, the photocatalytic chemical solution is fired, and the photocatalytic film is formed on the outer surface of the glass tube, thereby providing irregularities on the surface of the photocatalytic film, and the maximum value of the film thickness of the photocatalytic film. A method for manufacturing a straight tube type fluorescent lamp, wherein the difference from the minimum value is 50 to 900 nm, and the thickness of the photocatalytic film is 100 nm or more. In a method for manufacturing a straight tube fluorescent lamp in which a photocatalytic film is provided on an outer surface of a straight tube glass tube, the glass tube is rotated and a spray nozzle is moved from a first end to a second end of the glass tube. Then, while moving the spray nozzle from the second end of the glass tube to the first end, the spray nozzle sprays a photocatalytic chemical from the spray nozzle to the glass tube, and After the photocatalyst solution is applied to the outer surface of the glass tube so that the applied amount of the center portion of the photocatalyst solution to be sprayed is larger than the surrounding application amount, the photocatalyst solution is baked to form the glass. By forming the photocatalyst film on the outer surface of the tube, irregularities are provided on the surface of the photocatalyst film, and the difference between the maximum value and the minimum value of the thickness of the photocatalyst film is 50 to 900 nm, Straight-tube fluorescent lamp manufacturing method of which is characterized in that the thickness of the serial photocatalyst film or more 100 nm. Titanium organic compound as the photocatalyst chemical, acid, straight-tube fluorescent lamp manufacturing method according to claim 1 or 2, characterized in that a sol containing water and alcohol. Straight-tube fluorescent lamp manufacturing method according to claim 1 or 2, characterized in that a sol containing fine particles of titanium oxide crystal, acid, water and alcohol as the photocatalyst chemical.

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