JP5322830B2 - Method for bonding glass members - Google Patents

Description

The present invention relates to two or more glass member bonded how a glass member to be bonded.

Conventionally, glass members have been used for various applications. For example, glass members such as glass plates are widely used not only in the field of architecture and interiors but also in electrical products such as flat displays.
In addition to being used alone, this glass plate may be used by bonding two sheets together.
For example, in a plasma display panel, the two glass plates are arranged with a slight gap so that a phosphor is accommodated between two glass plates on the front side and the back side and light is emitted by plasma discharge. Sealing the outer peripheral part of a glass plate with low melting glass is performed.
That is, the low melting point glass frit is melted by heat and two glass plates are bonded at the outer periphery.

  Conventionally, a laminated glass obtained by bonding two glass plates is used to form part of a window or door of a building for the purpose of fire prevention or heat insulation. A method is described in which induction heating is performed in a state in which a metal foil is sandwiched between two glass plates to melt and weld the inside of the glass plate in order to produce a laminated glass provided with a glass.

  However, in such a bonding method, since the glass plate is heated to a temperature at which the glass can be melted, there is a possibility that distortion may occur in the joined body of the glass member such as the plasma display panel and the laminated glass after the bonding. .

In laminated glass, not only the method described above, but also a plastic film coated with an adhesive is sandwiched between two glass plates, and the adhesive integration of the glass plate / plastic film / glass plate is performed with this adhesive. The method to perform is also employ | adopted as the preparation method.
Thus, if a glass plate is bonded using an adhesive agent, it can suppress that the distortion by a heat | fever generate | occur | produces in a joined body.
However, bonding with an adhesive generally requires a long time and often requires measures against volatile organic components (VOC) generated from the adhesive, making it difficult to ensure good workability. .

That is, the conventional glass plate bonding method has a problem that it is difficult to ensure good workability while suppressing the occurrence of thermal distortion in the obtained bonded body.
In addition, the problem that it is difficult to ensure good workability while suppressing the occurrence of thermal strain in the obtained joined body is not only a plate-like glass member but also various shapes of glass members. It is a common problem.

JP-A-6-56485

  The present invention relates to a method for adhering a glass member having good workability while suppressing the occurrence of thermal strain in the joined body, and a joined body of glass member that can be easily produced but has reduced thermal strain. It is an issue to provide.

The present invention according to the method for adhering a glass member is a method for adhering two or more glass members, wherein a resin member is arranged between the glass members to be adhered, The resin member is melted by heat melting the resin member by irradiating the resin member with laser light through the glass member from at least one back side of the glass member. And the resin component constituting the coating material is a thermoplastic resin coated with the coating material coated on the surface of the glass member before bonding, and the resin material was coated with the coating material. The glass member is brought into contact with the covering materials, the laser light is irradiated to the interface between the covering materials, and a light absorber is disposed in advance at the position where the laser light is irradiated. 5kgf / c Is the state of being lost the interface by irradiating the laser beam ² or more 100 kgf / cm ² while applying the following pressure is characterized by carrying out the bonding.

In the present invention, the resin member is thermally melted, and the glass member is bonded by the resin member.
The resin member can usually be melted at a temperature lower than the temperature at which the glass is brought into a molten state.
In addition, in the present invention, the resin member is directly heated by the laser beam transmitted through the glass member, and bonding is performed.
Therefore, according to the method for adhering a glass member of the present invention, it is possible to perform adhesion while suppressing the glass member from being heated to a high temperature.
In addition, heating and bonding are performed in a short time by laser light, and bonding can be easily performed as compared with a conventional method using an adhesive.
That is, according to the present invention, a glass member bonding method that can be carried out by a simple method while suppressing the occurrence of thermal strain in the joined body, and thermal strain can be suppressed while being easily manufactured. And a joined body of glass members.

The side view which shows the conjugate | zygote manufacturing method of the glass member of one Embodiment. The side view which shows the conjugate | zygote manufacturing method of the glass member of other embodiment. The side view which shows the conjugate | zygote manufacturing method of the glass member of other embodiment. The side view which shows the conjugate | zygote manufacturing method of the glass member of other embodiment. The side view which shows the conjugate | zygote manufacturing method of the glass member of other embodiment.

Hereinafter, preferred embodiments of the present invention will be described (based on the accompanying drawings).
First, as a first embodiment, a method of manufacturing a glass plate joined body (hereinafter also simply referred to as “joined body”) by bonding two glass plates whose surfaces are coated with a resin will be described.

FIG. 1 is a side view showing a method for adhering a glass member. Reference numerals 10a and 10b represent surface-coated glass plates, and reference numeral 50 represents laser light.
As shown in FIG. 1, the surface-coated glass plates 10a and 10b in the present embodiment are plate-shaped glass members 11a and 11b (hereinafter referred to as “glass plate 11a” and “glass plate 11b”). And covering materials 12a and 12b covering the surfaces of the glass plates 11a and 11b.

  The material of the glass plates 11a and 11b is not particularly limited. For example, a glass plate made of hard borosilicate glass sold under the trade name “Tempax”, and marketed under the trade name “Vycor”. 96% silica glass sheet glass, borosilicate glass sheet glass marketed under the trade name “Pyrex”, non-alkali glass sheet glass marketed as “OA10”, aluminoborosilicate marketed under the trade name “AF45” As the glass plate glass, “D263”, commercially available barium borosilicate glass plate glass, lead alkali glass plate glass, soda lime glass plate glass, and quartz glass plate glass can be used.

In addition, as shown also in FIG.1 (c), in this embodiment, in the state which contact | covered the coating | covering materials 12a and 12b of the surface coat glass plates 10a and 10b piled up and down mutually, Bonding is performed by melting the covering materials 12a and 12b at the interface.
And in that case, since the laser beam 50 is irradiated from the back side of one surface-coated glass plate 10a and the inside of this surface-coated glass plate 10a is passed, at least, The glass plate 11a on the side through which the laser beam 50 passes preferably has a light transmittance of 30% or more with respect to the wavelength of the laser light, and particularly has a light transmittance of 50% or more. It is preferable.

The “light transmittance” is a value obtained by the following formula (1).
Transmitted light intensity ÷ incident light intensity × 100% (1)
(However, “incident light intensity” is determined by “irradiation light intensity−surface reflected light intensity”.)

The covering materials 12a and 12b are not particularly limited in their constituent components, but the resin component serving as a base is preferably a thermoplastic resin.
As this thermoplastic resin, polyethylene resin, polypropylene resin, polyethylene terephthalate resin, triacetyl cellulose, norbornene resin, acrylic resin, polyvinyl alcohol resin, cycloolefin polymer, thermoplastic polyimide, polyamideimide resin, polyethersulfone resin, Polyarylate resin, polybutadiene resin, polycarbonate resin, polyethylene naphthalate resin, polymethylpentene resin, polyurethane resin, polystyrene resin, polyphenylene sulfide resin, liquid crystal polymer, polyether ether ketone resin, and the like can be employed.

In addition, the components constituting the covering materials 12a and 12b may contain other components than those exemplified above. Examples of the “other components” include thermoplastic resins other than those described above, and heat Examples of the resin component include a curable resin.
Furthermore, additives, such as antioxidant, a flame retardant, a crosslinking agent, a light stabilizer, a pigment, a filler, can be mentioned.

  In addition, the resin composition which consists of the above components is used for formation of the said coating | covering materials 12a and 12b in the state which can be liquefied and varnished with an organic solvent, or can be heat-melted. For example, the coating materials 12a and 12b can be formed by applying and drying the varnish on the surfaces of the glass plates 11a and 11b.

  The organic solvent used for the production of the varnish depends on the type of resin component used for the formation of the coating material. For example, ketone solvents such as methyl ethyl ketone, methyl isobutyl ketone, cyclopentanone, cyclohexanone, methylene chloride, chloride Examples thereof include halogen solvents such as ethylene, chloroform and carbon tetrachloride, and aromatic solvents such as toluene, benzene and phenol.

Each of the covering materials 12a and 12b does not need to be a single layer. For example, the covering materials 12a and 12b may have a laminated structure of two or more layers using different resin compositions.
For example, it is also possible to form a coating material having a laminated structure of an adhesive layer and a film layer by adhering a resin film using the thermoplastic resin to the surface of a glass plate with an adhesive.
In addition, when the varnish is applied and dried on the glass plate, or when this adhesive layer is formed, the surface of the glass plate is previously coated with a coupling agent in that the adhesion between the glass plate and the covering material can be made stronger. It is preferable to process.

The coupling agent used for this coupling agent treatment may be a coupling agent such as a silane coupling agent or a titanate coupling agent, depending on the type of resin component of the coating material coated on the surface of the glass plate. For example, amino coupling agents, epoxy coupling agents, isocyanate coupling agents, vinyl coupling agents, mercapto coupling agents, (meth) acryloxy coupling agents and the like can be used.
The coupling agent is preferably applied to the surface of the glass plate so as to have a thickness of 0.001 μm to 10 μm, and more preferably 0.001 μm to 2 μm.

Examples of the adhesive used for forming the adhesive layer include acrylic, epoxy, silicone, and rubber-based adhesives that can be cured by heat, ultraviolet rays, electron beams, and the like.
The thickness of the adhesive layer is preferably 0.01 μm or more and 10 μm or less, and more preferably 0.1 μm or more and 7 μm or less.
The reason why the above range is preferable as the thickness of the adhesive layer is that an excellent adhesive force can be exhibited between the glass plate and the resin film.

In that case, at least a portion to be the outer layer can be formed by using a thermoplastic resin so that adhesion by the laser beam 50 can be facilitated.
Further, the glass plates 11a and 11b and the covering materials 12a and 12b are not particularly limited in thickness, and the respective thicknesses may be the same or different.
And the said glass plate may be normally selected from the range of 20 micrometers-20 mm.
The covering materials 12a and 12b vary in hardness and elastic modulus depending on the type of resin used, but are usually much softer and less elastic than glass plates.
Therefore, it is possible to make the joined body manufactured by setting the thickness to a certain level or more excellent in cushioning properties (impact resistance).

When the thickness of the glass plate is any thickness within the above range, the total thickness of the covering materials 12a and 12b should be 0.4 times or more the thickness of the glass plate. Thus, the joined body can be made excellent in cushioning properties.
However, if the thickness of the covering materials 12a and 12b is excessively increased, the thermal dimensional stability of the joined body may be lowered.
Therefore, when the thickness of the glass plate is any thickness within the above range, the total thickness of the covering materials 12a and 12b is formed to be 4 times or less than the thickness of the glass plate. Is preferred.
In addition, from the viewpoint of coexistence of cushioning properties and thermal dimensional stability, the total thickness of the covering material is preferably 0.4 times or more and 3 times or less with respect to the thickness of the glass plate, and 0.5 times or more. It is particularly preferable to set it to 2.2 times or less.
Also, if necessary, the joined body can be produced by making the thickness of the coating material on the inner side of the two glass plates different from the thickness of the outer coating material (surface side of the joined body). Is possible.
In this case, the ratio between the thickness of the glass plate and the thickness of the covering material is between the total thickness of the upper and lower covering materials of the surface-coated glass plates 10a and 10b and the total thickness of the glass plate. If it is in the above range, the above effects can be normally expected.

  And the joined body of the glass member having such a relationship between the glass plate thickness and the covering material thickness is suitable for flexible devices, lighting, displays, solar cells, etc. It is excellent in the flexibility required when considering the roll process.

When the surface-coated glass plates 10a and 10b are bonded to each other with the laser beam 50, a light absorber can be used so that the energy of the laser beam 50 effectively acts on the melting of the coating material.
Examples of the light absorber include carbon black, phthalocyanine absorber, naphthalocyanine absorber, polymethine absorber, diphenylmethane absorber, triphenylmethane absorber, quinone absorber, and azo absorber. Can be mentioned.
For example, when a laser beam having a wavelength of 800 to 1200 nm is used, a commercially available light absorber from Gentex under the trade name “Clearweld” can be used.

For example, the light absorber is dispersed in an organic solvent to prepare a coating liquid, and the coating liquid is applied and dried in advance on one of the surfaces of the surface-coated glass plates 10a and 10b. It can be located at the contact interface between the surface coated glass plates 10a and 10b, and by irradiating the laser beam 50 in this state, the energy of the laser beam 50 is efficiently converted into thermal energy useful for melting the coating material at this interface. Can be made.
Further, for example, the same effect as described above can be obtained by blending this light absorber in advance with the resin composition constituting the covering material 12b of the lower surface coated glass plate 10b that does not transmit the laser beam 50. Can be obtained.
In general, the amount of the light absorber to be used can be saved more in the case of preparing the coating liquid than in the case of blending in the resin composition constituting the coating material.
On the other hand, the time required for coating (working such as coating and drying) can be saved more when blended with the resin composition that constitutes the coating material than when preparing the coating liquid. From the viewpoint of workability, it can be said that this is a preferred embodiment.

The laser beam 50 used for bonding the surface-coated glass plates 10a and 10b is not particularly limited. For example, a solid-state laser such as a semiconductor laser, a fiber laser, a femtosecond laser, or a YAG laser, or a CO ₂ laser. And gas laser.
Among these, a semiconductor laser and a fiber laser are preferable in that a laser beam that is inexpensive and has a uniform in-plane intensity can be easily obtained.

In addition, a continuous wave CW laser (Continuous-Wave Laser) is preferable to a pulsed laser that instantaneously applies high energy in that it facilitates melting while preventing decomposition of the resin itself. .
Further, the laser output, power density, spot size, number of irradiations, scanning speed, and the like can be appropriately selected from the constituent components of the coating material (resin species and the like), thickness, light absorption rate, and the like.

A method for producing a joined body using the laser beam 50 and the surface-coated glass plates 10a and 10b will be described in detail below.
First, a method for producing the surface-coated glass plates 10a and 10b will be described.
If the varnish is used, for example, a step of preparing the varnish, a step of applying a coupling agent treatment to each of the glass plates 12a and 12b, and applying a varnish to the glass plate treated with the coupling agent A surface-coated glass plate can be produced by performing a drying step.

The step of preparing the varnish can be performed using a conventionally known stirrer such as a mixer, and the step of performing the coupling agent treatment creates a diluted solution containing a coupling agent at an appropriate concentration, Examples include a method in which the diluent is applied to a glass plate by a conventionally known coating method such as spray coating or dip coating, and is dried by a dryer such as an oven.
In the step of applying and drying the varnish on the glass plate, various coating methods such as a coating method such as comma coating and die coating, a relief printing method such as flexographic printing, and a direct gravure printing method can be used.

In the case where the covering material is constituted by the adhesive layer and the resin film layer, the adhesive is prepared in the same manner as the step of preparing the varnish, and the varnish is applied to the glass plate subjected to the coupling treatment. The method of apply | coating the said adhesive agent and carrying out bonding with the resin film prepared separately similarly to the process of apply | coating and drying is mentioned.
Or you may make it apply | coat an adhesive agent to the resin film side, produce the resin film with an adhesive layer, and bond this to the glass plate in which the coupling process was given.

Next, two surface-coated glass plates 10a and 10b are produced in this manner, and one surface-coated glass plate 10b is first set on the stage 90 in a flat state as shown in FIG. .
If the light absorber is used, for example, the surface-coated glass plate 10b may be formed by a general method such as a dispenser, an ink jet printer, screen printing, a two-fluid type, a one-fluid type or an ultrasonic spray, a stamper. A light absorber can be applied to the upper surface of the substrate.
And as shown in FIG.1 (b), it is set as the state which has distribute | arranged the light absorber to the interface by setting another surface coat glass plate 10a on this surface coat glass plate 10b in piles. Can do.

Then, as shown in FIG.1 (c), the contact interface part of these two surface coat glass plates 10a and 10b is irradiated by irradiating the laser beam 50 from the back side of the surface coat glass plate 10a accumulated on this. In 40, the covering material is melted to form the welded portion 20.
And the welding location 20 of a large area can be formed in a contact interface by moving the position which irradiates the laser beam 50 to the surface direction of a contact interface.
For example, a large area can be welded by scanning and irradiating a desired welding spot with a spot beam condensed to a desired beam size by a condenser lens.
Alternatively, it is possible to scan the beam with the laser head fixed by a galvano scanner, and further shape the laser beam into a desired shape by using an optical element such as a diffractive optical element, It is also possible to carry out area welding.
In this way, two glass members can be bonded to form one bonded body 30.

In order to perform this welding more reliably, for example, a plate-shaped, quadrangular prism-shaped, cylindrical, or ball-shaped transparent glass member is brought into contact as a pressing member from the upper surface side of the upper surface coated glass plate 10a. The welding can be performed while pressurizing downward.
The pressure applied at this time is preferably 0.5 kgf / cm ² or more and 100 kgf / cm ² or less, more preferably 1 kgf / cm ² or more and 20 kgf / cm ² or less.
Moreover, the method of spraying assist gas is mentioned as a method of making a pressure act on the contact interface part 40, without making the above members contact the upper surface of the surface coat glass plate 10a directly.
At this time, as the gas type of the assist gas, an inert gas such as helium or neon, air, nitrogen gas, or the like can be used.

The spraying of the assist gas may be performed along the optical axis of the laser beam 50, or may be performed from the front side or the rear side in the scanning direction toward the irradiation point of the laser beam 50, for example.
The gas pressure of the assist gas is preferably set to a pressure at which a pressure of 0.01 MPa or more and less than 5 MPa acts on the irradiation point of the laser beam 50.
It is preferable that the gas pressure of the assist gas is within the above range. If the gas pressure is less than the above range, it is difficult to expect an effect of improving adhesiveness. If the gas pressure exceeds the above range, the pressure is excessive. This is because the surface-coated glass plate 10a and the like may be vibrated and may cause a positional shift.
That is, it is preferable that the gas pressure of the assist gas is within the above-mentioned range because it is possible to perform welding with high positional accuracy and high strength. The gas pressure is more preferably 0.1 MPa or more and less than 2 MPa.

In the manufacturing method of the joined member 30 of the glass member as described above, the irradiation condition of the laser beam 50 and the pressurizing condition are adjusted, and the upper covering material 12a and the lower covering material 12b at the welding location 20 It is preferable to perform welding in such a state that the interface between them disappears.
By eliminating the interface as described above, sufficient compatibilization is achieved, and the adhesion strength between the surface-coated glass plates 10a and 10b can be improved.
Moreover, since an interface is not formed in the welding location 20, for example, the light transmission property and the like can be improved.

In addition, when sufficient heating is performed to such an extent that the interface disappears, the contact interface 40 usually has a temperature of at most 300 ° C., although depending on the type of resin constituting the covering materials 12a and 12b. In this way, the joined body 30 in which the glass plates 11a and 11b are firmly bonded to each other by the covering materials 12a and 12b can be formed without applying high heat to the upper and lower glass plates 11a and 11b.
Moreover, it is possible to form a joined body in which the glass plates are firmly joined by a simple method by irradiation with the laser beam 50.

Thus, according to the present invention, a joined body of glass members can be easily produced while suppressing the occurrence of thermal strain in the joined body.
In the present embodiment, a glass plate is exemplified as the glass member. However, in the present invention, the glass member is not limited to the glass plate, and various forms of glass such as a glass rod and a glass ball are used. A product-made member can be employed.
Moreover, in this embodiment, although the case where the resin member used for adhesion | attachment of a glass member is the coating | coated material previously coat | covered with the glass plate, this invention shows the usage aspect of a resin member. It is not limited to such a case.

  Furthermore, in this embodiment, the case where welding is performed at one contact interface 40 and two glass plates 11a and 11b are bonded is illustrated, but for example, three or more glass plates are used. The case where bonding is performed by overlapping is also within the intended scope of the present invention.

Such other embodiments will be described below.
2-4 is a side view which shows the 2nd-4th embodiment of this invention, and attaches | subjects the same code | symbol to the thing which shows the structure similar to 1st Embodiment.

First, a second embodiment will be described with reference to FIG.
In the first embodiment, the case of using the surface coated glass plates 10a and 10b in which the coating materials 12a and 12b are previously coated on the glass plates 11a and 11b has been described. The glass plates 11a and 11b that are not covered with the members are laminated via the resin film 12c, and the resin film 12c is melted by the laser beam 50 irradiated from the back side of the upper glass plate 11a to melt the resin. The case where glass plate 11a, 11b is adhere | attached by making resin adhere | attach on the surface of both upper and lower glass plates 11a, 11b is shown.

In the method for adhering a glass member in the second embodiment, it is possible to reduce the time and effort of previously covering the glass plate with the coating material, and the process can be simplified.
On the other hand, since the resin film 12c is used as the resin member used for bonding the glass plates 11a and 11b, the workability may be lowered depending on the type of the resin film 12c used.

For example, as shown in the first embodiment, when a coating material is formed on the surface of a glass plate with varnish, it is easy to make the thickness as thin as several μm. Since the resin member is carried on the glass plate, the possibility of difficulty in handling is low.
On the other hand, in this second embodiment, if a resin film having a thickness of 10 μm or less is used as the resin member, for example, the stiffness is too weak and the resin member adheres to an undesired place due to the action of static electricity or the like. And there is a risk that handling will be worse.
In order to prevent this, if a thick resin film exceeding 10 μm is used, in this second embodiment, it is necessary to soften (melt) the entire resin film in order to bond the upper and lower glass plates respectively. Therefore, there is a possibility that the energy to be input becomes enormous.

That is, in the method for adhering a glass member in the second embodiment, the number of steps can be reduced, but there is a risk of increasing the labor required for the steps.
In the second embodiment, the glass plate 11a, 11b is the same as the first embodiment in that the bonding strength can be improved by applying a coupling treatment or pressurizing at the time of welding. .

Moreover, as shown in FIG. 3, the surface coat glass plate 10a which coat | covered the surface of the glass plate 11a with the coating | coated material 12a by which a resin composition is used is used only for one side, and the other is only glass plate 11b. You can also
In the third embodiment, the work of covering the surface of the glass plate with the covering material can be halved, and handling problems when using a thin resin film can be solved.

FIG. 4 is a side view for explaining a bonding method (fourth embodiment) for bonding three or more glass plates. In the fourth embodiment, three surface-coated glass plates 10x and 10y are used. The point of using 10z is different from the previous embodiments.
Then, for these three surface-coated glass plates 10x, 10y, and 10z laminated, for example, as shown in FIG. Can be bonded.
That is, the laser beam 50 ′ from the back side of the upper surface coated glass plate 10x with respect to the contact interface 40 ′ between the uppermost surface coated glass plate 10x and the lower surface coated glass plate 10y. , To form a welded portion 20 ′, and to the contact interface portion 40 ″ between the surface-coated glass plate 10z disposed at the lowest position and the surface-coated glass plate 10y on the surface-coated glass plate 10z The laser beam 50 ″ can be irradiated from the back side of the lower surface coated glass plate 10z to form the welded portion 20 ″.

According to such a bonding method, three or more glass plates can be bonded at a time.
In adopting such an adhesion method, the laser beam 50 "is irradiated from below rather than placing the glass plate on the stage and irradiating the laser beam as in the previous embodiments. In order to make it possible, a laminate of three surface-coated glass plates 10x, 10y, and 10z is placed on a transparent glass plate 60 ″, and laser light 50 ″ is irradiated through the glass plate 60 ″. You can do it.
In such a case, a similar glass plate 60 ′ is also disposed above the upper surface coated glass plate 10x, and cooperates with the lower glass plate 60 ″ to contact the interface portions 40 ′, 40 during welding. "" May be applied.

Further, if necessary, as shown in FIG. 5, a part of the energy of the laser beam is absorbed and the remaining part is transmitted through the contact interface 40 ′ between the surface-coated glass plate 10x and the surface-coated glass plate 10y therebelow. It is also possible to simultaneously weld the contact interface 40 ″ between the middle surface coated glass plate 10y and the lower surface coated glass plate 10z (fifth embodiment).
As a method according to the fifth embodiment, for example, there is a method of arranging a larger amount of light absorber in the lower contact interface portion 40 ″ than in the upper contact interface portion 40 ′.

In the fourth and fifth embodiments, as in the third embodiment, the center surface coated glass plate 10y is changed to a simple glass plate without a covering material, and the upper and lower surface coats are changed. It is also possible to bond three glass plates using a glass plate 10x, 10z covering material.
Alternatively, only the center is a surface-coated glass plate, the upper and lower surface-coated glass plates 10x and 10z are changed to simple glass plates, and the respective coating materials on the upper surface side and the lower surface side of the central surface-coated glass plate are used. It is also possible to bond three glass plates.

Furthermore, the present invention can be practiced with various improvements regardless of these examples.
And the joined body of the glass member obtained by the bonding method of the present invention is excellent in the bonding strength between the glass members, and the state in which thermal distortion is suppressed because high heat is suppressed during bonding. Can be formed.

  EXAMPLES Next, although an Example is given and this invention is demonstrated in more detail, this invention is not limited to these.

Example 1
The materials used for producing the joined body of glass members are as follows.
1) Glass plate Material “D263” (borosilicate glass, manufactured by Schott), thickness 50 μm
2) Coating material “Polyethersulfone resin”
3) Light Absorber “Clearweld LD120C” (Gentex Co., Ltd .: Absorbance 40% of light with a wavelength of 940 nm at 100 nm thickness)
4) Pressure member (glass plate)
Material "Fused quartz glass"

The method for adhering the glass member with such a material used was carried out as follows.
First, a surface-coated glass plate was prepared so that the coating material had a thickness of 35 μm on one side of two glass plates.
Next, the surface-coated glass plates are overlapped with the covering materials in contact with each other, and the light absorbing agent is arranged at a thickness of 100 nm at the contact interface, and the pressure member is 3 kgf. The laser beam was irradiated while pressurizing at a pressure of / cm ² to weld the interface part.
Specifically, welding was performed by scanning a laser spot having a wavelength of 940 nm, an output of 30 W, and a spot diameter of 2 mmφ at a speed of 50 mm / s.
The obtained joined body is in a state in which the interface between the coating material on one glass plate side and the coating material on the other glass plate side is lost, and the resin compositions constituting the coating material at the interface part It was confirmed that was sufficiently compatibilized.
Further, no thermal distortion was observed, and it was confirmed that the glass plates were bonded with high adhesive strength.

(Example 2)
The materials used for producing the joined body of glass members are as follows.
1) Glass plate Material “D263” (borosilicate glass, manufactured by Schott), thickness 50 μm
2) Coating material “Polyarylate resin”
3) Light Absorber “Clearweld LD120C” (Gentex Co., Ltd .: Absorbance 40% of light with a wavelength of 940 nm at 100 nm thickness)
4) Pressure member (glass plate)
Material "Fused quartz glass"

The method for adhering the glass member with such a material used was carried out as follows.
First, a surface-coated glass plate was prepared so that the coating material had a thickness of 35 μm on one side of two glass plates.
Next, the surface-coated glass plates are overlapped with the covering materials in contact with each other, and the light absorbing agent is arranged at a thickness of 100 nm at the contact interface, and the pressure member is 3 kgf. The laser beam was irradiated while pressurizing at a pressure of / cm ² to weld the interface part.
Specifically, welding was performed by scanning a laser spot having a wavelength of 940 nm, an output of 50 W, and a spot diameter of 2 mmφ at a speed of 30 mm / s.
That is, only the resin type used for the coating material, the laser output, and the laser spot scanning speed are changed, and the subsequent conditions are the same as those in the first embodiment.

The joined body obtained in Example 2 is also in a state in which the interface between the coating material on one glass plate side and the coating material on the other glass plate side has disappeared, and constitutes the coating material at the interface portion. It was confirmed that the resin compositions were sufficiently compatible with each other.
Further, no thermal distortion was observed, and it was confirmed that the glass plates were bonded with high adhesive strength.

  Also from the above, the bonding method according to the present invention has good workability while suppressing the occurrence of thermal strain in the joined body, and can be easily manufactured while being easily fabricated. It can be seen that a suppressed joined body of glass members can be produced.

  10a, 10b: surface-coated glass plate, 11a, 11b: glass plate, 12a, 12b: coating material, 20: welded part, 30: joined body of glass member, 40: contact interface part, 50: laser light, 90: stage

Claims (1)

A method for adhering two or more glass members, which is a method for adhering glass members,
A resin member is disposed between the glass members to be bonded, and the glass member is transmitted from at least one back side of the glass member to irradiate the resin member with laser light. The resin member is melted by heat, and the bonding is performed with the heat-melted resin member .
The resin component constituting the covering material with a covering material coated on the surface of the glass member before the resin member is bonded is a thermoplastic resin,
The glass member coated with the coating material is brought into contact with the coating materials,
While irradiating the interface between the coating materials with the laser light and arranging a light absorber in advance at the position irradiated with the laser light, applying a pressure of 0.5 kgf / cm ² or more and 100 kgf / cm ² or less, A method for adhering a glass member, wherein the bonding is performed by irradiating a laser beam to make the interface disappear .

Images