JPH115963A - Adhesive for electric bulb base, electric bulb, and lighting tool for electric bulb - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an adhesive that has improved resistances to heat and ultraviolet rays and can retain a high adhesive strength for a long term even under bad contitions by mixing an alcholic solvent into a material comprising a silicone resin and an inorg. filler. SOLUTION: This adhesive is prepd. by mixing and homogeneously dispersing an alcohol, pref. a denatured alcohol, into a material comprising a silicone resin (such as a silicone resin, a silicone varnish, or a silicone rubber) and an inorg. filler (such as one mainly comprising calcium carbonate or silica) and therefore is free from such troubles caused by a conventional adhesive contg. toluene/xylene solvent that black smoke and a bad odor are emitted by a burning solvent in thermal baking in the step of bonding an electric bulb to its base. In addition, the adhesive can withstand the temp. rise of the base due to the downsizing or output increase of an electric bulb.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lamp cap adhesive for a glass bulb, which is capable of maintaining a high bonding force for a long time by joining a glass bulb and a nozzle, a tube using the adhesive, and a tube lamp using the same. The present invention relates to a lighting device equipped with a bulb.

[0002]

2. Description of the Related Art A bulb such as a general light bulb or a fluorescent lamp has a base joined to an end of a bulb for supplying power to a filament and an electrode and holding the bulb, and this base is attached to a socket. Thus, predetermined light emission and its holding are performed.

[0003] The adhesive used for bonding the above-mentioned glass bulb and the base is such that (1) in addition to withstanding the temperature rise of the base due to conduction heat and radiant heat from the bulb bulb, the filament of the bulb is broken. Complete its life, and maintain its bond without deterioration until it is removed from the socket.
(2) It must be able to withstand ultraviolet rays emitted from the bulb, and (3) in the production process of the bulb, it is necessary to easily attach the adhesive to the base in a short time at a speed that does not cause a stringing phenomenon. It is.

[0004] Generally, as a material of an adhesive used for joining a base to a tube, an inorganic filler such as calcium carbonate, shellac, rosin, and a curing agent are blended with a bonding agent such as phenol resin. An organic solvent such as alcohol is added and kneaded to obtain a predetermined viscosity, and the mixture is heated by being interposed between a valve and a base to join the two.

[0005] Such an adhesive has little deterioration with respect to heat or ultraviolet rays from a bulb bulb and is sufficiently resistant to normal use.

[0006] On the other hand, the trend of lighting fixtures is to reduce the size and output of the fixtures and to make them more sealed. Accordingly, there is a need for an adhesive having high heat resistance and ultraviolet light resistance and high bonding strength that meets these conditions. In recent years, in addition to the above-mentioned compact high-power and sealed construction, it is also used under special conditions such as dimming the voltage for lighting a bulb such as dimming and using it for a long period of time (for example, 1.5 times the rated life). Things are getting more and more.

[0007] To cope with this prolonged life, JIS
(Japanese Industrial Standards), 165
After 1.5 hours of the rated life in an electric furnace at ℃, the joint torque strength of the joint is standardized (2.5N ·
m or more), and a corresponding adhesive was required.

[0008]

Therefore, in order to enhance the performance such as heat resistance and ultraviolet light resistance, it is necessary to add a silicone resin to the above-mentioned phenolic resin-based adhesive as a main component or to require a higher heat resistance. An adhesive using a silicone resin as an adhesive main agent is known. But,
The adhesive using the silicone resin sometimes causes a problem in the working environment in the process of heating and curing the composition material and the adhesive.

[0009] This is because the adhesive requires fluidity in relation to the function and handling, and a solvent is added to form a paste kneaded with an appropriate viscosity. As the silicone adhesive, a toluene-xylene-based or naphthene-based one in which the silicone resin is soluble is used as the solvent.

However, toluene-xylene solvents are harmful and require careful handling. Naphthene solvents have higher safety but are slightly less soluble and more expensive than toluene and xylene solvents. Problem. In addition, in the case of using silicone resin as the main adhesive, it is intended to use a general-purpose tube cap adhesive filling machine to inject the adhesive by using air pressure on the inner wall of the cap and to attach a predetermined amount in a ring in a short time. Then, there is a problem that the adhesive is clogged in the injection valve, or the thread is pulled like a syrup, making it difficult to perform the work and soiling the surroundings.

When a silicone resin is added to a phenol resin adhesive, the solvent in which the silicone resin is soluble is toluene / xylene, whereas the solvent of the phenol resin solution is alcohol (for example, denatured alcohol). And a mixture of ethanol and additives), and focusing on the mutual solubility of the two solvents, xylene and denatured alcohol are completely mutually soluble, but toluene and denatured alcohol are completely mutually soluble only at an arbitrary ratio. Therefore, there is a possibility that a part is separated depending on the ratio, and as a result, the silicone resins are not uniformly mixed, which causes a variation in the adhesive strength and the heat resistance.

As described above, when a silicone resin adhesive to which a highly toxic toluene / xylene-based solvent is added is used, the solvent is hardened in the adhesive curing process by heat treatment in the joining process between the valve and the base. The components that burn are volatilized, generating black smoke and an unusual odor, which may cause a problem in the working environment.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and in a bonding agent which uses a silicone resin to improve performance such as heat resistance and ultraviolet light resistance, it does not add a substance having a high harmfulness to a die bonding operation. A lamp that can maintain a high bonding force for a long period of time, which can improve the safety and health conditions at the same time and can withstand the temperature rise and high output of the base part due to downsizing and high output of the lighting equipment and the tube An object of the present invention is to provide a base adhesive and a bulb and a lighting device.

[0014]

According to a first aspect of the present invention, there is provided a lamp cap adhesive for a tube, which comprises kneading a silicone resin, an inorganic filler, and an alcohol-based solvent added to the material. It is characterized by becoming.

The conventional toluene-xylene solvent used for the silicone resin adhesive has a high degree of harmfulness. In addition, the solvent burns during the heating and baking in the joining process between the valve and the base, generating black smoke and an unpleasant odor. There was something to do. Further, naphthene-based solvents have high safety but have a problem that they are slightly insoluble and expensive.

However, an adhesive obtained by kneading a silicone resin and an alcohol-based solvent has no problem in terms of hygiene at the time of use, can disperse the silicone resin evenly, and can remove the solvent from the solvent in the heating and baking step. Generation of black smoke and off-flavor can be prevented.

The form of the silicone resin includes silicone resin, silicone varnish, silicone rubber and the like. Further, as the inorganic filler occupying most of the adhesive, by selecting from those mainly composed of calcium carbonate or silica, it is possible to obtain a workable viscosity and a predetermined bonding strength and to reduce the price. .

[0018] The tube base adhesive according to a second aspect of the present invention is characterized in that the alcohol-based solvent comprises a denatured alcohol.

By using a denatured alcohol as the solvent, the same action as described in the first aspect can be obtained.

According to a third aspect of the present invention, there is provided a tube cap adhesive comprising a phenol resin, an inorganic filler, and a dry-mixed silicone resin added to the material.

Conventionally, the solvent of the silicone resin used for the adhesive is a toluene / xylene type solvent, which cannot be uniformly dispersed when mixed with a phenol resin or an inorganic filler, and the toluene / xylene type solvent has a problem in hygiene. In addition, the solvent sometimes burns during the heating and baking in the joining process between the valve and the base, generating black smoke and an unusual odor. However, by adding a silicone resin to a phenolic resin or an inorganic filler and dry-mixing to form an adhesive without using a solvent, the heat-resistant silicone resin can be uniformly dispersed, and in the heat baking step. The generation of black smoke and off-flavor from the solvent can be prevented.

The form of the silicone resin includes silicone resin, silicone varnish, silicone rubber and the like. Furthermore, by selecting an inorganic filler occupying most of the adhesive from those mainly composed of calcium carbonate or silica, it is possible to obtain a workable viscosity, a predetermined bonding strength and a low price.

According to a fourth aspect of the present invention, there is provided a tube cap adhesive comprising a phenol resin, an inorganic filler, and a solvent-free silicone resin added to the material.

The same operation as that of the third aspect is provided.

[0025] The tube base adhesive according to claim 5 of the present invention is characterized in that the amount of silicone resin added is 1 to 10% by weight.

If the silicone content is less than 1% by weight with respect to the total amount of the adhesive, heat resistance will not be improved.
If the weight percent is exceeded, the viscosity of the adhesive decreases, and when the adhesive is injected into the inner wall of the base using air pressure using a general-purpose tube base adhesive filling machine and adheres in a predetermined amount in an annular manner, the adhesive is removed. There is no clogging of the injection valve, no trouble in pulling the thread like syrup, and the surroundings are not stained, so that the filling operation of the adhesive can be performed as before.

The content of the phenolic resin as the main adhesive is 5 to 20% by weight. If the content is less than 5% by weight, the adhesive effect as an adhesive is reduced,
If the ratio exceeds the above range, baking by the adhesive becomes strong and cracks occur in the glass bulb, which is not preferable.

[0028] The tube cap adhesive according to claim 6 of the present invention is characterized in that the silicone resin contains 50% or more of a methyl organic group.

The same operation as that of the fourth aspect is obtained.

[0030] The tube cap adhesive according to claim 7 of the present invention is characterized in that the silicone resin is soluble in an alcohol-based solvent.

By using a silicone resin soluble in a solvent such as a denatured alcohol, the dispersibility in a phenol resin solution is improved, and as a result, the silicone resin can be uniformly mixed. Further, as described above, it is possible to prevent black smoke and unpleasant odor generated by burning of the solvent at the time of heating and baking in the joining process between the valve and the base.

According to an eighth aspect of the present invention, there is provided a tube, wherein the glass bulb and the base are joined via the tube base adhesive according to any one of the first to seventh aspects. And

By joining the glass bulb and the base using the tube base adhesive according to any one of the first to seventh aspects, the heat resistance is high and the effect that the bonding strength does not decrease for a long time is obtained. Play.

According to a ninth aspect of the present invention, the bulb is a light bulb or a discharge lamp.

The bulb to which the adhesive of the present invention can be applied is not limited to a bulb requiring heat resistance, but may be a fluorescent lamp or germicidal lamp requiring ultraviolet resistance, or a high pressure discharge lamp or the like requiring both. The same effect as described in the eighth aspect can be obtained by using these tubes.

According to a tenth aspect of the present invention, there is provided a tube lighting device comprising: a device main body; a socket provided on the device main body; and a tube according to the eighth or ninth aspect mounted on the socket. It is characterized by doing.

A lighting device such as a lighting device using the tube according to claim 8 or 9, wherein the self-heating by lighting of the tube in a sealed device or a high place where the atmosphere is high in temperature. And has the same effect as described in claim 8 or 9.

[0038]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below.

To prepare the first tube cap adhesive of the present invention, first, a silicone resin powder as an adhesive main agent, a calcium carbonate powder as an inorganic filler, and a denatured alcohol as a solvent are prepared.

Then, the following materials were mixed in the following amounts of silicone resin (silicone resin), calcium carbonate and solvent, and kneaded with a mixer to prepare a paste adhesive. Silicone resin (silicone resin) Approx. 16% by weight Calcium carbonate powder Remainder Denatured alcohol Approx. 11% by weight In order to make the second tube cap adhesive of the present invention, first, a silicone resin is modified as a main adhesive. Calcium carbonate powder is mixed with the solution dissolved in alcohol as an inorganic filler.

The above silicone resin has a highly three-dimensionally crosslinked network structure, and has an average particle size of about 20 μm combined with, for example, calcium carbonate powder (particle size distribution of 3 to 80 μm).
m) was used.

Alternatively, a powder obtained by dry-mixing a silicone powder and a calcium carbonate powder with a denatured alcohol is mixed.

Specifically, the above-mentioned materials including calcium carbonate obtained by mixing a silicone resin without a solvent were mixed in the following amounts, and kneaded with a mixer to prepare a paste adhesive. Phenol resin solution containing shellac and rosin Approx. 18% by weight Calcium carbonate powder dry-blended with silicone resin Remainder Hexamine (hardener solution) Approx. 2% by weight The average particle size represented by the present invention is defined by a standard sieve (JIS).
The particle size is classified for each particle size rank using a sieve, a distribution is determined by a weight ratio for each particle size rank, and the average particle size is calculated from the distribution by a weighted average. When the particles could not be separated by sieving due to their small diameter, the distribution was determined by weight ratio using an ultracentrifugal automatic distribution measuring device (CAPA-700, Horiba Seisakusho), and the average particle diameter was calculated by weighted average.

In order to prepare the third tube cap adhesive according to the present invention, first, a phenol resin powder containing shellac and rosin as an adhesive main agent and a silicone resin powder are dissolved in a solvent composed of denatured alcohol. For example, calcium carbonate powder is prepared as an inorganic filler, and a hexamine solution is prepared as a curing agent.

The following materials were mixed in the following amounts of the phenol resin powder, the silicone resin solution, the inorganic filler, and the hexamine (curing agent) solution, and kneaded with a mixer to prepare a paste adhesive.

Phenolic resin containing shellac and rosin about 16% by weight Silicone resin solution about 2% by weight Calcium carbonate powder Remainder Hexamine (hardener) solution About 2% by weight And the first to third tube caps A predetermined amount of the adhesive was annularly applied to the inner wall of the E26 base using a general-purpose tube base adhesive filling machine. Then, as shown in FIG. 1, a base 3 to which an adhesive 2 is adhered is mounted on a sealing portion 5 of a glass bulb 4 of a general bulb 11 in which a coiled filament and an inert gas are sealed, and a general-purpose bulb is used. 3 parts of a base were mounted in a base heating kettle of an automatic base bonding machine, and heated under normal lamp manufacturing conditions to bake the adhesive 2 to join the bulb 4 and the base 3.

When the adhesive 2 was baked in this die joining machine, slight odorless white smoke was recognized, but no black smoke or unpleasant odor was generated. A light bulb (rated life: 1000 hours) manufactured under the same conditions as the conventional one except for the material of the adhesive 2 was replaced with a light bulb of 0 hours.
A die torque test was performed on the die joint at 500 hours, 1000 hours, and after 1500 hours (1.5 times the rated life) in an oven so that the time and the atmosphere temperature in the box were about 165 ° C. Japanese Industrial Standards (JI
It showed a strength of 2.5 N · m or more, which exceeded S), and its strength was small and there was no problem at all.

The composition of the first adhesive 2 after the baking was about 18% by weight of a silicone resin and about 82% by weight of an inorganic filler (calcium carbonate, shellac, rosin, etc.). The composition of the second adhesive 2 after the baking is about 6.4% by weight of a phenol resin, about 2% by weight of a silicone resin, and about 91.6% by weight of an inorganic filler (calcium carbonate, shellac, rosin, etc.). Met.

Next, the adhesive strength of the first to third adhesives (partially changing the amount of added silicone) and the conventional adhesive according to the present invention, variation in adhesive strength, heat resistance, A comparative test was performed on the ultraviolet light resistance, elongation characteristics, problems, and the like using the bulb 11 and the test piece shown in FIG. The results (adhesion strength, variations in adhesion strength, heat resistance, UV resistance, elongation characteristics, and problems during baking of the adhesive) were as shown in Tables 1 and 2 below.

For comparison, the conventional adhesive F mainly composed of a phenolic resin is composed of about 6.4% by weight of a phenolic resin, about 80% by weight of an inorganic filler (calcium carbonate, shellac, rosin, etc.) and about 16% by weight of hexamine. 2% by weight
And others. Similarly, the conventional adhesive S mainly composed of a silicone resin for comparison is made of toluene.
Xylene silicone resin about 16% by weight, inorganic filler (calcium carbonate, shellac, rosin, etc.) about 82
% By weight and others.

The test piece for which the heat resistance was tested had a length of about 1
Prepare two plate bodies made of glass of 0 mm x about 20 mm x about 1 mm thick, and between the plate bodies, about 7 mm in length x about 10 mm in width
An adhesive having a thickness of about 1 mm was formed and bonded in the area described above, and the adhesive was cured by heating at about 180 ° C. for 10 minutes in an electric furnace. Then, the test pieces are placed in electric furnaces (constant temperature baths) at 215 ° C., 185 ° C. and 165 ° C., and five test pieces are taken out every 100 hours, and the shear strength is measured by pulling the test pieces in opposite directions parallel to the bonding surface. Was.

As a test piece for which the UV resistance was tested, a plate made of glass having a length of about 10 mm, a width of about 20 mm and a thickness of about 1 mm was prepared. An adhesive having a thickness of about 1 mm is formed and adhered to the surface of the bulb of the tube-shaped germicidal lamp GL15.
The adhesive was cured by heating at 80 ° C. for 10 minutes. Then, the sterilizing lamp GL15 was continuously turned on to forcibly irradiate the adhesive with ultraviolet rays. Then, a jig having a weight of 500 gr was taken out every 100 hours and placed on the end of the test piece, and the number of remaining test pieces that did not come off was examined.

Further, an elongation property effective as a test for evaluating the adhesive state of the adhesive was examined. In this test, 2 g of the adhesive was rolled into a spherical shape and placed on a top plate, and the diameter after heating for 10 minutes in an electric furnace (a constant temperature bath) at a temperature of 180 ° C. was measured.

Further, the test for the problem at the time of baking the adhesive is as follows.
2 g of the adhesive was placed in an aluminum container and heated from below to observe the presence or absence of smoke and odor during evaporation of the solvent and after ignition, and the color of the residual component. (The color of this residual component is preferably white, and when blackened, the adhesive becomes black and the appearance of the light bulb is deteriorated.)

[Table 1] In the table, the symbol ○ indicates good, Δ indicates no practical problem, and X indicates unfavorable. As is clear from Table 1, the product of the present invention has no problem even if the silicone resin as the adhesive component is uniformly dispersed, the adhesive strength and its variation are small and the high temperature is maintained. In addition, there were no problems with heat resistance, ultraviolet resistance, and elongation characteristics, and further, there was no generation of black smoke or unpleasant odor at the time of baking the adhesive, and the superiority of the product of the present invention was confirmed.

Further, the same test piece as used for the heat resistance test for the first adhesive was used. The test piece was placed in an electric furnace at a temperature of 180 ° C. and heated for 1 minute.
After sintering for 5 minutes, 5 minutes, and 10 minutes, 5 pieces were taken out each and examined for changes in adhesive strength.

FIG. 2 is a graph showing the change in the adhesive strength. The horizontal axis represents the firing time (minutes), and the vertical axis represents the adhesive strength (N).
Is compared. As is clear from FIG. 2, the adhesive strength of the first adhesive A (●) according to the present invention is almost equal to that of the conventional adhesive S (■) mainly composed of silicone resin.
An improved result was obtained compared with the conventional adhesive F (▲) mainly composed of a phenol resin.

The first to third tube cap adhesives are formed into a ring by injecting the adhesive by using air pressure to the inner wall of the cap using a general-purpose tube cap adhesive filling machine having low viscosity. When applying a predetermined amount, the adhesive is not clogged in the injection valve, it is difficult to work by pulling a thread like syrup and the surroundings are not dirty, and the filling work of the adhesive is easy, and
It could be performed in a shorter time than before.

The fourth tube cap adhesive of the present invention is a basic structural unit of a silicone resin as an adhesive component.

(Equation 1) In the above, a non-solvent having 50% by weight or more of an organic group R as a methyl group may be used.

That is, a solution in which a phenol resin containing shellac and rosin is dissolved in a denatured alcohol as an adhesive main agent, and a solventless silicone resin having a methyl group in an organic group of 50% by weight or more, for example, calcium carbonate powder as an inorganic filler. Also, a hexamine solution is prepared as a curing agent.

Then, a mixed solution of the above-mentioned phenol resin and silicone resin is prepared using a solvent composed of a commonly soluble denatured alcohol, and a calcium carbonate powder and a hexamine solution are further added to the mixed solution (each of the above-mentioned compounds). The compounding amounts of the materials are as follows.) And kneaded with a mixer to prepare a paste adhesive.

A phenol resin solution containing shellac and rosin about 18% by weight Silicone resin about 2% by weight Calcium carbonate powder The remainder Hexamine (hardener) solution about 2% by weight When the valve 4 and the base 3 are joined together using the base adhesive 2, the adhesive 2
At the time of baking, slight odorless white smoke was recognized, but no black smoke or off-flavor was generated.
The die torque strength test of the die joint after 0 hour, 1000 hours and 1500 hours has passed is 2.5 Nm
The above strength was exhibited, and there was no problem in filling the adhesive with the die.

Further, the composition of the fourth tube cap adhesive was tested with various changes, and the results shown in Table 2 were obtained. Note that the test procedure was performed using the same sample and method as described above, and thus will not be described here.

[0063]

[Table 2] The symbol ◎ in the table is very good, ○ is good, and △ there is no practical problem.

As is clear from Table 2, the heat resistance, ultraviolet light resistance, adhesive burning test, and the lamp life test at the time of bulb life and the 165 ° C. cap torque test specified by JIS all showed practically no problem. Organic group R constituting silicone resin
It was found that when the component (A) had a methyl-based content of 50% by weight or more with respect to the phenyl-based component, black smoke, unpleasant odor, and black residue, which would be a problem when baking the adhesive, were not generated.

From the above Tables 1 and 2, the adhesive according to the present invention showed characteristics comparable to those of the conventional adhesive in tests on a test piece and a general-purpose light bulb, and there was no practical problem. .

Further, the tube of the present invention can be applied to a straight tube type fluorescent lamp 12 shown in FIG. In FIG. 3, a base 3 is attached to sealing portions 5 at both ends (only one end is shown) of a glass bulb 4 having a straight tube shape via the adhesive 2 and both are joined.

FIG. 4 shows an embodiment of the lighting device 6 of the present invention equipped with the electric bulb 11 of FIG. In the figure, reference numeral 7 denotes an apparatus main body, 8 denotes a socket provided in the main body 7 and to which the base 3 of the light bulb 11 is mounted, 71 denotes a light reflector, and 72 denotes a light control member such as a light diffusion plate which covers an opening of the main body 7. Reference numeral 73 denotes a power supply line connected to the socket 8.

The lighting device 6 is mounted in a ceiling or the like, and when electricity is supplied to the light bulb 11 through the power supply line 73 and the socket 8, a filament (not shown) emits light and emits light downward through the light control body 72. Radiate.

The main body 7 of the lighting device 6 is close to hermetically closed, and the base 3 of the bulb 11 located above the main body 7 is maintained at a high temperature by convection heat or the like, but a filament (not shown). Adhesive 2 even if the wire breaks and reaches the end of its life
Thus, the connection between the bulb 4 and the base 3 was maintained, and the bulb 4 could be replaced with a new bulb 11 without detaching from the base 3.

The structure of the lighting device 6 is not limited to the embodiment, but may be other applications or configurations. Further, the light source is not limited to the bulb 11, but may be a fluorescent lamp 12, an ultraviolet lamp, or the like. It can also be applied to lighting equipment for low-pressure discharge lamps and the like. In the case of a discharge lamp or a reflective bulb, the instrument body 7 and the light reflector 71 may be used in some cases, and these are referred to as a combined instrument body in the present invention.

[0071]

According to the invention of claim 1 or 2 of the present invention, there is no decrease in the adhesive strength and the problem of safety and hygiene is solved. In addition, it is possible to maintain high bonding strength over a long period of time even in a bad environment, which is excellent in heat resistance and ultraviolet resistance in which a high temperature is maintained. Further, it is possible to provide a tube base adhesive which is excellent in working environment in which no black smoke or unpleasant odor is generated at the time of baking the adhesive and which has no problem in filling the adhesive.

According to the second to seventh aspects of the present invention, the silicone resin as the adhesive component is uniformly dispersed in the adhesive, so that the adhesive strength is not reduced and the dispersion of the strength is reduced. In addition, it is possible to maintain high bonding strength over a long period of time even in a bad environment, which is excellent in heat resistance and ultraviolet resistance in which a high temperature is maintained. Further, it is possible to provide a tube base adhesive which is excellent in working environment in which no black smoke or unpleasant odor is generated at the time of baking the adhesive and which has no problem in filling the adhesive.

According to the eighth or ninth aspect of the present invention, an adhesive having the effects described in the first to seventh aspects is provided, and has a high bonding strength for a long period of time.
Even if the lamp is lit at a voltage lower than the rated voltage and is lit for a long period of time, which is about twice the rated life, the bonding strength exceeding the JIS standard can be maintained.

Therefore, it is possible to prevent the glass bulb from falling off from the base before the life of the lamp is completed, and particularly to reduce the temperature rise and ultraviolet radiation due to the recent downsizing of lighting equipment and the lamp and the increase in output. Can be reduced, and the environment in which the adhesive is baked can be improved.

Further, according to the tenth aspect of the present invention, since the tube having the effects described in the eighth or seventh aspect is provided, the glass can be removed from the base when removing the bulb from the lighting equipment. There is an advantage that the bulb can be safely replaced electrically without the valve coming off.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional front view of a general light bulb showing an embodiment of the present invention.

FIG. 2 is a graph showing the relationship between the sintering time of the adhesive and the adhesive strength, in which the horizontal axis represents the sintering time (minutes) and the vertical axis represents the adhesive strength (N).
Is compared.

FIG. 3 is a partial cross-sectional front view showing one end side of a fluorescent lamp showing an embodiment of the present invention.

FIG. 4 is a partial cross-sectional front view of a lighting device for a light bulb showing an embodiment of the present invention.

[Explanation of symbols]

 11: tube (bulb) 12: tube (fluorescent lamp) 2: adhesive 3: base 4: glass bulb 5: sealing part 6: lighting device 8: socket

Claims (10)

[Claims] 1. A tube base adhesive comprising a silicone resin, an inorganic filler, and an alcohol-based solvent added to said material. 2. An adhesive according to claim 1, wherein the alcohol-based solvent comprises a denatured alcohol. 3. A tube base adhesive comprising a phenol resin, an inorganic filler, and a silicone resin added to the above-mentioned materials and dry-mixed. 4. A tube base adhesive comprising a phenol resin, an inorganic filler, and a solvent-free silicone resin added to the above-mentioned material. 5. The tube cap adhesive according to claim 3, wherein the addition amount of the silicone resin is 1 to 10% by weight. 6. The silicone resin has five methyl-based organic groups.
5. The base cap adhesive according to claim 4, comprising 0% or more. 7. The tube base adhesive according to claim 3, wherein the silicone resin is soluble in an alcohol-based solvent. 8. The method according to claim 1, wherein the glass bulb and the base are provided.
8. A tube which is joined via the tube base adhesive according to any one of items 7 to 7. 9. The lamp according to claim 8, wherein the lamp is a light bulb or a discharge lamp. 10. A tube lighting device comprising: a device main body; a socket provided in the device main body; and the tube according to claim 8 mounted on the socket. .