WO2010032840A1 - Electrical connection structure for window glass for vehicles, window glass for vehicles, and method for manufacturing window glass for vehicles - Google Patents

Electrical connection structure for window glass for vehicles, window glass for vehicles, and method for manufacturing window glass for vehicles Download PDF

Info

Publication number
WO2010032840A1
WO2010032840A1 PCT/JP2009/066419 JP2009066419W WO2010032840A1 WO 2010032840 A1 WO2010032840 A1 WO 2010032840A1 JP 2009066419 W JP2009066419 W JP 2009066419W WO 2010032840 A1 WO2010032840 A1 WO 2010032840A1
Authority
WO
WIPO (PCT)
Prior art keywords
window glass
terminal
vehicle window
adhesive
conductive adhesive
Prior art date
Application number
PCT/JP2009/066419
Other languages
French (fr)
Japanese (ja)
Inventor
隆 細美
朋斉 甲斐
章紀 成瀬
Original Assignee
旭硝子株式会社
藤倉化成株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 旭硝子株式会社, 藤倉化成株式会社 filed Critical 旭硝子株式会社
Priority to JP2010529819A priority Critical patent/JP5501972B2/en
Publication of WO2010032840A1 publication Critical patent/WO2010032840A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/04—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation using electrically conductive adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10761—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing vinyl acetal
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/016—Heaters using particular connecting means

Definitions

  • the present invention relates to a vehicle window glass feeding structure, a vehicle window glass, and a vehicle window glass manufacturing method, and more particularly to a vehicle window glass feed for supplying current to a conductor formed on an automobile window glass.
  • the present invention relates to a structure, a vehicle window glass, and a method for manufacturing a vehicle window glass.
  • the rear glass and side glass of a vehicle are often equipped with an anti-fogging heater that prevents the glass from fogging.
  • some vehicles with a cold region specification are provided with a conductor (heating wire) for heating the glass near the standby position of the wiper blade in order to prevent the wiper blade provided in the windshield from freezing.
  • These antifogging and heating conductors are electrically conductively supplied with weak currents such as antennas for receiving radio waves of TV broadcast waves, radio waves of AM / FM broadcast waves, and broadband radio waves such as PHS. Compared with the body, a large current (1 A or more) is supplied.
  • a feeding point is formed on these conductors, and a terminal for energization is joined to the feeding point. Thereby, an electric current is supplied from the power supply part by the side of a vehicle body via this terminal.
  • solder containing Pb for example, Pb—Sn—Bi—Ag solder
  • Pb—Sn—Bi—Ag solder has been used for joining a terminal to a feeding point.
  • Patent Document 1 discloses a technique for joining a terminal to a feeding point using a solder containing a conductive component and a buffer component and not containing Pb.
  • the glass plate to which this technology is applied is intended for tempered glass whose strength does not easily decrease even when a thermal shock is applied. That is, when the technique of Patent Document 1 is applied to laminated glass that is formed by heat-pressing a plurality of unstrengthened glass plates through a resin intermediate film, a part of the glass plate to which solder is applied In addition, residual stress is generated due to thermal shock caused by high-temperature solder. For this reason, there existed a problem that the intensity
  • a conductor is formed on the surface of the vehicle window glass (conductor (formed on a glass), and terminals (connecting points) of the conductor are connected
  • the terminals are 50-150 It is cured by heating to ° C., and is bonded to the feeding point by a conductive adhesive that exhibits a conductive and adhesive function, and is fixed to the vehicle window glass by an adhesive member.
  • a power supply structure for a vehicle window glass is provided.
  • a vehicle window glass characterized in that the vehicle window glass feeding structure of the present invention is mounted.
  • a step of forming a conductor on the surface of the vehicle window glass, and a terminal and / or a conductive adhesive on the conductor at a feeding point of the conductor A step of applying, a step of temporarily fixing the terminal and the conductor via a conductive adhesive, a step of fixing the terminal to a vehicle window glass with an adhesive member, and a step of Heating at a temperature of 150 ° C. for 10 minutes or more, and by heating, the conductive adhesive exhibits conductivity and an adhesive function, and is bonded by the conductive adhesive, and by the adhesive member, the terminal Is fixed to the window glass for vehicles, and the manufacturing method of the window glass for vehicles is provided.
  • the bonding of the terminal with the conductive adhesive is performed instead of the bonding with the solder.
  • This conductive adhesive has the property of being cured by heating to 50 to 150 ° C. and exhibiting electrical conductivity and an adhesive function. That is, the vehicle window glass of the present invention first forms a conductor on the surface of the vehicle window glass, then temporarily holds the terminal at the power feeding point of the conductor with the conductive adhesive, The terminal is fixed to the vehicle window glass by an adhesive member, and then the vehicle window glass is heated at a temperature of 50 to 150 ° C. for 10 minutes or more to cure the conductive adhesive.
  • the adhesive member is intended to reinforce the adhesive strength of the conductive adhesive and to hold the terminal until it is cured, and the adhesive performance does not deteriorate even when heated at a temperature of 50 to 150 ° C. for 10 minutes or more.
  • a thermoplastic resin can be used suitably.
  • the thermoplastic curable resin include an adhesive tape of acrylic resin or ethylene vinyl acetate (EVA) resin, and an adhesive tape or film of a laminate of polyethylene terephthalate (PET) resin and EVA resin. Thereby, a terminal can be adhere
  • a vehicle window glass can be provided.
  • tempered glass and laminated glass can be applied.
  • the number of steps for heating the conductive adhesive is increased in the manufacturing process, but in the case of laminated glass, in the step of thermocompression bonding of two glass plates through an intermediate film, conductive bonding is performed.
  • the agent can be heated. For this reason, there exists an advantage that it can manufacture, without increasing a manufacturing process.
  • the conductive adhesive contains an epoxy resin that is liquid at room temperature, a phenol resin that is liquid at room temperature, a reactive diluent, an imidazole compound, and silver powder and / or silver-coated metal powder. It is preferable to use a one-component solvent-free conductive adhesive.
  • an adhesive is a general-purpose adhesive that permanently exhibits adhesive performance, an adhesive (pressure-sensitive adhesive) having removability, and a viscosity that exhibits adhesive properties at the time of adhesion. Including adhesives.
  • the room temperature refers to 10 to 40 ° C.
  • an epoxy resin that is liquid at room temperature hereinafter also simply referred to as “epoxy resin” used for the conductive adhesive in the present invention is contained in the conductive adhesive as a binder.
  • the epoxy resin that is liquid at room temperature used for the conductive adhesive in the present invention reacts with a liquid phenol resin or the like at room temperature to be described later to form a cured product, and the cured product is a conductive metal particle responsible for conductivity ( Acts as a binder for conductive metal particles).
  • Such epoxy resins generally have a rigid structure having an aromatic ring, and are bisphenol F type epoxy resins, bisphenol A type epoxy resins, urethane modified epoxy resins, rubber modified epoxy resins, naphthalene type epoxy resins, phenols. Examples include novolak epoxy resins, dimer acid-modified epoxy resins, and phthalate ester epoxy resins. These epoxy resins may be used alone or in combination of two or more.
  • the content of the epoxy resin is preferably 2 to 10% by mass and more preferably 3 to 8% by mass in 100% by mass of the conductive adhesive.
  • the content of the epoxy resin is smaller than the above value, the adhesive strength becomes weak and it becomes difficult to function as an adhesive.
  • the content is larger than the above value, the connection of the silver powder and / or the silver-coated metal powder is deteriorated, and it may be difficult to obtain conductivity.
  • the phenol resin that is liquid at room temperature (hereinafter also referred to as “liquid phenol resin”) used for the conductive adhesive in the present invention is contained in the conductive adhesive as a curing agent for the epoxy resin. Since the liquid phenol resin is easily mixed with other components, the content of the reactive diluent described later can be reduced. As a result, the adhesive strength of the cured product obtained by curing the conductive adhesive can be improved. Moreover, a conductive adhesive can be made into a solventless type adhesive by using a liquid phenol resin. Examples of such a liquid phenol resin include a liquid novolac type phenol resin.
  • the content of the above liquid phenol resin is preferably 2 to 10% by mass, more preferably 3 to 8% by mass in 100% by mass of the conductive adhesive.
  • content of said liquid phenol resin becomes smaller than the said value, it will become impossible to fully raise the adhesive strength of a conductive adhesive.
  • the content is larger than the above value, the electrical resistance under high temperature and high humidity or heat cycle increases.
  • the liquid phenol resin is preferably contained in an amount of 50 to 250 parts by mass, more preferably 80 to 150 parts by mass with respect to 100 parts by mass of the epoxy resin. If the content of the above-mentioned liquid phenol resin with respect to the epoxy resin is within the above range, the balance between the content of the epoxy resin (main agent) and the above-mentioned liquid phenol resin (curing agent) becomes good, and the conductive adhesive is cured.
  • the liquid phenol resin contains one or more types of phenol resins that are solid at room temperature within a range that does not impair the characteristics of the liquid phenol resin. You may let them.
  • phenol resin solid at room temperature examples include cresol novolac resin, dicyclopentadiene phenol resin, terpene phenol resin, triphenolmethane resin, and phenol aralkyl resin.
  • the content of the phenol resin solid at room temperature is preferably 20 parts by mass or less with respect to 100 parts by mass of the liquid phenol resin.
  • the reactive diluent in the present invention is an aliphatic compound having a plurality of glycidyl groups or a compound having one glycidyl group and an aromatic ring, and is a liquid compound at room temperature.
  • the conductive adhesive in the present invention contains a large amount of conductive metal particles for developing conductivity, the use of a reactive diluent can improve the dispersion state of the conductive metal particles. Moreover, since the viscosity of a conductive adhesive can be adjusted appropriately, handling property and workability are improved.
  • the reactive diluent since the reactive diluent has a glycidyl group, it can react with the phenol resin. Therefore, it is taken into a part of the cured product when the conductive adhesive is cured, and becomes a binder for the conductive metal particles.
  • the reactive diluent is a cured product obtained by curing the conductive adhesive by having a flexible structure or having only one glycidyl group. Gives flexibility. Therefore, by using the epoxy resin and the reactive diluent together, and adjusting the blending ratio of the epoxy resin and the reactive diluent, the hardness, elasticity, etc. of the cured product obtained by curing the conductive adhesive are adequate. Can be adjusted.
  • Reactive diluents include glycidyl orthotoluidine, ethylene glycol diglycidyl ether, 2-ethylhexyl glycidyl ether, glycidyl methacrylate, cyclohexanedimethanol diglycidyl ether, trimethylolpropane triglycidyl ether, neopentyl glycol diglycidyl ether, phenyl glycidyl ether Examples include ether, polyethylene glycol diglycidyl ether, and polypropylene glycol diglycidyl ether. These reactive diluents may be used alone or in combination of two or more.
  • the content of the reactive diluent is preferably 2 to 10% by mass and more preferably 3 to 8% by mass in 100% by mass of the conductive adhesive.
  • content of a reactive diluent becomes smaller than the said value, the viscosity at the time of setting it as a conductive adhesive will become high too much, and the dispersibility of the silver powder and / or silver coat metal powder which are mentioned later falls. As a result, the conductive adhesive is difficult to apply, and workability is reduced.
  • the content is larger than the above value, the cured product of the adhesive becomes brittle and the adhesive strength is lowered.
  • the imidazole compound in the present invention is contained in a conductive adhesive as a curing accelerator.
  • a conductive adhesive as a curing accelerator.
  • the curability of the conductive adhesive becomes good, and as a result, the heat resistance of the cured product is improved.
  • imidazole compounds include 2-phenylimidazole, 2-undecylimidazole, 2-phenyl-4,5-dihydroxymethylimidazole, 2-phenyl-4-methyl-5-hydroxymethylimidazole, 4, 4′- Examples include imidazole-based epoxy curing accelerators such as methylenebis (2-ethyl-methylimidazole) and 2-heptadecylimidazole. These imidazole compounds may be used alone or in combination of two or more.
  • the content of the imidazole compound is preferably 0.5 to 5% by mass and more preferably 1 to 4% by mass in 100% by mass of the conductive adhesive.
  • content of an imidazole compound becomes smaller than the said value, sclerosis
  • the content is larger than the above value, the reactivity becomes faster and the storage stability becomes worse.
  • the conductive metal particles it is preferable to use at least one of silver powder and silver-coated metal powder.
  • a silver coat metal powder the silver plating copper powder which silver-plated copper powder, the silver plating nickel powder which silver-plated nickel powder, etc. can be used, for example.
  • the silver powder and the silver-coated metal powder may have a substantially spherical shape or a flake shape, but a flake shape is preferred.
  • the 50% diameter by Microtrack is preferably 1 to 20 ⁇ m, more preferably 3 to 15 ⁇ m from the viewpoint of conductivity.
  • the content of the silver powder and / or silver-coated metal powder is preferably 100% by mass, 70 to 92% by mass, more preferably 75 to 90% by mass.
  • the conductive adhesive in the present invention can be prepared by mixing the above-described components with a roll mill or the like. As a result, it is possible to provide a conductive adhesive that cures at 50 to 150 ° C., preferably 80 to 130 ° C., and exhibits electrical conductivity and an adhesive function.
  • the terminal and the adhesive member are sealed to the vehicle window glass by a waterproof member.
  • a primer is applied to the glass plate side to which the terminal and the adhesive member are attached, and a silicone sealant as a sealing material is placed.
  • This silicone sealant cures at room temperature in 5 hours to 5 days. Thereby, the waterproofness of a feeding point, a terminal, and an adhesive member improves. It can also be sealed with a thermosetting resin such as a hot melt adhesive.
  • the current value supplied to the terminal can be set to 1 to 30 A, and the electric resistance value between the current-carrying side of the terminal and the conductor bonded to the power-feeding point is 100 m ⁇ or less. It is preferable that This is because it is possible to secure current for energizing the power feeding portion to obtain anti-fogging and desired heating performance, and at the same time to prevent heating of the power feeding point and ensure adhesive strength and conductivity.
  • the temperature of the terminal when a current of 10 A is supplied to the terminal for 30 minutes is 80 ° C. or less, and the adhesive strength of the terminal to the feeding point is 79 N or more.
  • an anti-fogging heater is formed on the rear glass of a vehicle using tempered glass.
  • laminated glass is mainly applied to a windshield of a vehicle, and a conductor as a heating wire for heating a wiper blade may be formed on the windshield in addition to antifogging. Since these heating hot wires are supplied with a large current as compared with a conductor to which a weak current such as an antenna is supplied, the temperature of the terminal rises due to the electrical resistance between the terminal and the feeding point. If the temperature rise of this terminal is not suppressed, there is a risk of giving a thermal shock to the glass plate itself, and adversely affects circuit components and resin components arranged in the vicinity thereof.
  • the evaluation standard is that the temperature of the terminal is 80 ° C. or less when a current of 10 A is supplied to the terminal for 30 minutes. In order to achieve the temperature (80 ° C. or less), it is preferable that the electric resistance value between the current-carrying side of the terminal and the conductor bonded to the feeding point is 100 m ⁇ or less.
  • the current value supplied to the laminated glass using the unstrengthened glass plate is preferably set to 1 to 10 A, and in the case of tempered glass, it is set to 10 to 30 A. It is preferable to do.
  • the adhesive strength is the tensile strength of the terminal, and is the tensile strength when the terminal is pulled away from the feeding point by pulling the terminal in the in-glass direction.
  • the terminal with the conductive adhesive cured is pulled in the in-plane direction of the glass plate via a push-pull gauge, and the value when the terminal peels from the feeding point is a value measured with the push-pull gauge. is there.
  • this evaluation standard it is set as 79 N or more, and the feeding structure of the vehicle window glass of the present invention can exceed the evaluation standard.
  • the breaking strength measured by a strain gauge near the feeding point of the vehicle window glass is 60 MPa or more.
  • the weight is dropped on the back surface of the vehicle window glass feeding structure, and the breaking strength is evaluated from the falling height of the weight when the vehicle window glass is broken.
  • the vehicle window glass feeding structure of the present invention can exceed the evaluation standard.
  • the terminal can be satisfactorily bonded to the power feeding point of the conductor without using solder, and solder is used.
  • the window glass for vehicles in which the terminal is satisfactorily bonded to the power feeding point of the conductor can be provided.
  • solder containing Pb or oxidizing flux used for soldering is not used, it can be mounted without using harmful substances, and VOC (volatile organic organic compounds) can be used during or during mounting. ) Can be realized, and an environmentally friendly terminal mounting structure can be realized.
  • FIG. 2 is a cross-sectional view taken along line AA in FIG. It is the perspective view which showed the electric power feeding structure of the windshield of embodiment. It is explanatory drawing which showed the manufacturing process of the windshield of embodiment.
  • FIG. 1 is a plan view of a vehicle windshield (hereinafter abbreviated as “windshield”) 10 to which the vehicle window glass of the embodiment is applied
  • FIG. 2 is a cross-sectional view taken along the line AA of FIG. It is a figure and is an expanded sectional view showing the electric supply structure of an embodiment.
  • the windshield 10 which is a laminated glass is illustrated as a window glass for vehicles, it is not limited to a windshield, It can apply also to a rear glass, a side glass, a roof glass, etc.
  • the glass plate is not limited to laminated glass, and is composed of a glass plate (so-called semi-tempered glass) designed to have a lower puncture strength of tempered glass or glass than general tempered glass.
  • the present invention can also be applied to glass with a film to which a film or the like is attached (so-called bilayer glass).
  • bilayer glass glass with a film to which a film or the like is attached.
  • the thickness of one plate glass used in the present invention is preferably 1 to 6 mm as a glass substrate used for vehicle glass. Further, if the thickness is 1 to 2.3 mm, it is suitable as a substrate for laminated glass for vehicles, and if it is 1.8 mm or less, it further contributes to the weight reduction of the laminated glass. If it is 2.3 to 6 mm, it can be applied as a tempered glass substrate, and the breaking strength in the vicinity of the feeding point can be easily maintained. Furthermore, if it is 2.5-3.5 mm, it can manufacture with the tempered glass manufacturing apparatus for general purpose vehicles, and it is advantageous in cost. Moreover, if it is 3 mm or less, the contribution to the weight reduction of tempered glass is large.
  • a shielding layer 12 called “black sera” is formed in a band shape around the windshield 10.
  • the shielding layer 12 is formed, for example, by applying black sera printing ink on a glass surface and baking it.
  • the shielding layer 12 forms a black opaque layer around the windshield 10.
  • the black opaque layer prevents deterioration of the urethane sealant holding the windshield 10 in the vicinity thereof due to ultraviolet rays, and wind.
  • the feeding point 16 and the terminal 18 shown in FIG. 2 of the conductor 14 attached around the shield 10 cannot be seen through from the outside of the vehicle.
  • the shielding layer 12 is omitted in FIG. 2, the shielding layer 12 is formed in the periphery of the glass plate 20 outside the vehicle constituting the windshield 10, and the conductor 14 is formed on the surface layer of the shielding layer 12. Is formed.
  • the conductor 14 is a heating wire that heats a wiper blade (not shown) of the windshield 10, and a large current (1 A or more) is supplied from a battery that is a power supply unit on the vehicle body side.
  • the conductor 14 is formed by applying a conductive silver paste on the shielding layer 12 by screen printing or applying a conductive toner by electronic printing, and then baking.
  • reference numeral 22 denotes a glass plate inside the vehicle constituting the windshield 10, and is formed by sandwiching an intermediate film 24 made of a resin such as PVB (polyvinyl butyral resin) between the glass plate 22 and the glass plate 20. Is done.
  • the laminated body of the glass plate 22 and the intermediate film 24 is comprised in the laminated glass which is the windshield 10 by carrying out thermocompression bonding (heating conditions: 130 degreeC, 15 minutes) with an autoclave apparatus.
  • Reference numeral 26 denotes a conductive adhesive (described later) for bonding the terminal 18 to the feeding point 16
  • reference numeral 28 denotes an adhesive tape (adhesive member) for bonding the terminal 18 to the glass plate 20.
  • This silicone sealant 30 is formed to expose the arc-shaped cutout portion 23 formed in advance on the glass plate 22 on the vehicle interior side shown in FIG. 3, that is, the feeding point 16 formed on the glass plate 20 on the vehicle exterior side. Bonded so as to fill the notch 23. Thereby, since the feeding point 16, the terminal 18, and the adhesive tape 28 are sealed by the silicone sealant 30, the feeding point 16, the terminal 18 and the adhesive tape 28 are concealed, and the waterproofness of the feeding structure is improved.
  • the conductive adhesive 26 has the property of being cured by heating to 50 to 150 ° C. and exhibiting a conductive and adhesive function.
  • FIG. 4 shows the manufacturing process of the windshield 10.
  • the glass plate 20 (22) before being bent and cut to the size of the windshield 10 is cleaned by the cleaning unit 32. Note that the notch 23 has already been formed on the glass plate 22 inside the vehicle at this point.
  • the cleaned glass plate 20 (22) is carried into a bending furnace 34 where the glass plate 20 (22) is heated to a temperature at which bending can be performed, and the curved surface of the windshield is pressed by a press device or by its own weight. Bend to a curvature along The glass layer 20 on the outside of the vehicle is pre-coated with the shielding layer 12 and the conductor 14 before bending, and the shielding layer 12 and the conductor 14 are baked onto the glass plate 20 by the heat of the bending furnace 34. It is done.
  • the bent glass plate 20 (22) is cleaned by the cleaning unit 36, and then, in the intermediate film insertion unit 38, the glass plate 22 on the vehicle inner side is connected to the glass plate 22 on the vehicle outer side via the intermediate film 24. Overlapping. Thereby, the feeding point 16 is exposed from the notch 23 of the glass plate 22 inside the vehicle.
  • the terminal 18 is bonded to the feeding point 16 with the conductive adhesive 26, and further the terminal 18 is bonded to the glass plate 20 with the adhesive tape 28.
  • the glass plate 20 and the glass plate 22 sandwiching the intermediate film 24 are carried into the autoclave device 40 and thermocompression bonded under heating conditions of 130 ° C. for 15 minutes.
  • the conductive adhesive 26 hardens
  • a primer is applied to the surface of the adhesive tape 28, and a silicone sealant 30 is placed thereon so as to fill the recess of the notch 23.
  • This silicone sealant 30 cures at room temperature in 24 hours. Thereby, the waterproofness of the feeding point 16, the terminal 18, and the adhesive tape 28 is improved.
  • the pressure-sensitive adhesive tape 28 is intended to reinforce the adhesive force of the conductive adhesive 26 and hold the terminal 18 until it is cured, and its performance does not deteriorate even when heated at a temperature of 50 to 150 ° C. for 10 minutes or more.
  • Acrylic resin tape for example, trade name “J-7710” manufactured by Soken Chemical Co., Ltd. can be exemplified. Thereby, the terminal 18 can be bonded to the feeding point 16 with a sufficient adhesive force.
  • the terminal 18 can be satisfactorily bonded to the power supply point 16 of the conductor 14 without using solder. Further, it is possible to provide the windshield 10 in which the terminal 18 is favorably bonded to the feeding point 16 without using solder.
  • the conductive adhesive 26 includes 4 parts by mass of a bisphenol F type epoxy resin (manufactured by Japan Epoxy Resin Co., “Ep806”) as a liquid epoxy resin at room temperature, and a liquid novolac type phenol as a liquid phenol resin at room temperature.
  • a bisphenol F type epoxy resin manufactured by Japan Epoxy Resin Co., “Ep806”
  • a liquid novolac type phenol as a liquid phenol resin at room temperature
  • the current value supplied to the terminal 18 is 1 to 30 A, and the electrical resistance value between the terminal 18 and the power supply point 16, that is, the electricity of the cured conductive adhesive 26.
  • the resistance value is preferably 100 m ⁇ or less.
  • the current value is a set value of the DC power supply (manufactured by Takasago Seisakusho).
  • the bonding area of the terminals was 4 mm square (16 mm 2 ), and the thickness of the conductive adhesive was fixed to 0.1 to 0.3 mm.
  • the electrical resistance value is measured as a resistance value of the power supply structure by a value between the power supply line bonded to the power supply side of the terminal and the conductor bonded to the power supply point.
  • the electrical resistance value can be measured by a known method.
  • the electrical resistance value was measured by a milliohm high tester (manufactured by Hioki Engineering Service Co., Ltd.).
  • the temperature of the terminal 18 when a current of 10 A is supplied to the terminal 18 for 30 minutes is 80 ° C. or less
  • the adhesive strength of the terminal 18 to the feeding point 16 is preferably 79 N or more, more preferably 120 N or more. is there.
  • the conductor 14 of the embodiment is supplied with a larger current than a conductor such as an antenna to which a weak current is supplied, the terminal 18 rises due to the electrical resistance between the terminal 18 and the feeding point 16. Warm up. If the temperature rise of the terminal 18 is not suppressed, the glass plate 20 and the glass plate 22 themselves may be subjected to thermal shock, and may adversely affect circuit components and resin components disposed in the vicinity thereof.
  • a certain evaluation standard is set. The evaluation standard is that the temperature of the terminal is 80 ° C. or less when a current of 10 A is supplied to the terminal for 30 minutes. In order to achieve the temperature (80 ° C. or lower), the electrical resistance value between the terminal and the feeding point is preferably 100 m ⁇ or less, and more preferably 50 m ⁇ or less.
  • the temperature of the terminal 18 when 10 A was supplied to the terminal 18 for 30 minutes was 50 ° C., which satisfied the evaluation criteria.
  • the current value supplied to the laminated glass is preferably 1 to 10A, and in the case of tempered glass, it is preferably 10 to 30A.
  • the adhesive strength is the tensile strength of the terminal 18 and is the tensile strength when the terminal 18 is pulled from the feeding point 16 by pulling the terminal 18 in the glass in-plane direction.
  • the terminal 18 having the conductive adhesive 26 cured is pulled in the in-plane direction of the glass plate 20 through a push-pull gauge, and the numerical value when the terminal 18 is peeled off from the feeding point 16 is obtained by the push-pull gauge. It is a measured value.
  • the bonding area of the terminals was 4 mm square (16 mm 2 ), and the thickness of the conductive adhesive was fixed to 0.1 to 0.3 mm.
  • the adhesive strength was 79 N or more, and the power feeding structure of the embodiment was 160 N, which satisfied the evaluation standard.
  • EVA resin film for example, Bridgestone's product name: EVA SAFE
  • other specifications are the same as the tensile strength of the terminal 180N, which satisfies the evaluation criteria.
  • the breaking strength measured by a strain gauge near the feeding point of the windshield 10 is 60 MPa or more.
  • a glass plate 20 with a strain gauge attached in the vicinity of the terminal attachment portion on the side (vehicle interior) to which the terminal 18 of the glass plate 20 is bonded is prepared, and the surface with the strain gauge attached is directed downward. Support horizontally.
  • a rubber hammer is set in the vertical direction in the vicinity of the terminal mounting portion of the glass plate 20, and near the terminal mounting portion on the surface (vehicle outer side) on the side where the terminals 18 of the glass plate 20 are not bonded from a predetermined height. Let it fall freely.
  • the stress input from the strain gauge value after dropping is read, and the strength at which the glass plate 20 is broken is taken as the breaking strength.
  • the vicinity of the feeding point refers to a range measured by the following evaluation method. Specifically, the weight is dropped on the back side of the power feeding structure portion of the windshield 10, and the breaking strength is evaluated from the falling height of the weight when the windshield 10 is broken.
  • the breaking strength of the windshield 10 of the embodiment was 70 MPa, which satisfied the evaluation criteria.
  • the vehicle window glass feeding structure and the vehicle window glass manufacturing method of the present invention can satisfactorily bond the terminal to the power feeding point of the conductor without using solder, and the terminal to the power feeding point of the conductor.
  • the present invention is industrially useful in that it can provide a vehicle window glass that is well bonded. It should be noted that the entire contents of the specification, claims, drawings and abstract of Japanese Patent Application No. 2008-239257 filed on September 18, 2008 are cited here as disclosure of the specification of the present invention. Incorporated.
  • DESCRIPTION OF SYMBOLS 10 Wind shield, 12 ... Shielding layer, 14 ... Conductor, 16 ... Feeding point, 18 ... Terminal, 20 ... Glass plate outside the vehicle, 22 ... Glass plate inside the vehicle, 23 ... Notch, 24 ... Intermediate film, DESCRIPTION OF SYMBOLS 26 ... Conductive adhesive agent, 28 ... Adhesive tape, 30 ... Silicone sealant, 32 ... Cleaning part, 34 ... Bending molding furnace, 36 ... Cleaning part, 38 ... Intermediate film insertion part, 40 ... Autoclave apparatus

Abstract

Disclosed are an electrical connection structure for a window glass for vehicles, a window glass for vehicles, and a method for manufacturing a window glass for vehicles. A terminal (18) is bonded by means of a conductive adhesive (26) instead of solder bonding.  The conductive adhesive (26) has a property of being cured at 50 to 150°C to develop conductive and bonding functions.  That is, a windshield (10) is manufactured by first forming an electric conductor (14) on a surface of the windshield (10), then bonding a terminal (18) to an electrical connecting point (16) in the electric conductor (14) by the conductive adhesive (26), then bonding the terminal (18) to the windshield (10) by a pressure-sensitive adhesive tape (28), and then heating the windshield (10) at a temperature of 50 to 150°C for 10 minutes or more to cure the conductive adhesive (26).

Description

車両用窓ガラスの給電構造及び車両用窓ガラス並びに車両用窓ガラスの製造方法Power supply structure for vehicle window glass, vehicle window glass, and method for manufacturing vehicle window glass
　本発明は車両用窓ガラスの給電構造及び車両用窓ガラス並びに車両用窓ガラスの製造方法に係り、特に自動車用窓ガラスに形成された導電体に電流を供給するための車両用窓ガラスの給電構造及び車両用窓ガラス並びに車両用窓ガラスの製造方法に関する。 The present invention relates to a vehicle window glass feeding structure, a vehicle window glass, and a vehicle window glass manufacturing method, and more particularly to a vehicle window glass feed for supplying current to a conductor formed on an automobile window glass. The present invention relates to a structure, a vehicle window glass, and a method for manufacturing a vehicle window glass.
　車両のリアガラスやサイドガラスには、ガラスの曇りを防止する防曇用ヒータが備えられている場合が多い。さらに、寒冷地仕様の車両には、ウインドシールドに供えられたワイパーブレードの凍結を防止するためにワイパーブレードの待機位置付近のガラスを加熱する導電体（電熱線）が形成されているものがある。これらの防曇や加熱用の導電体は、ＴＶ放送波の電波の受信、ＡＭ／ＦＭ放送波の電波の受信、及びＰＨＳなどの広帯域な電波を送受信するアンテナなどの微弱電流が供給される導電体と比較して、大電流（１Ａ以上）が供給される。 The rear glass and side glass of a vehicle are often equipped with an anti-fogging heater that prevents the glass from fogging. Furthermore, some vehicles with a cold region specification are provided with a conductor (heating wire) for heating the glass near the standby position of the wiper blade in order to prevent the wiper blade provided in the windshield from freezing. . These antifogging and heating conductors are electrically conductively supplied with weak currents such as antennas for receiving radio waves of TV broadcast waves, radio waves of AM / FM broadcast waves, and broadband radio waves such as PHS. Compared with the body, a large current (1 A or more) is supplied.
　これらの導電体には給電点が形成されており、この給電点に通電のための端子が接合される。これにより、この端子を介して電流が車体側の電源部から供給される。 A feeding point is formed on these conductors, and a terminal for energization is joined to the feeding point. Thereby, an electric current is supplied from the power supply part by the side of a vehicle body via this terminal.
　給電点に対する端子の接合には、一般にＰｂを含む半田、例えば、Ｐｂ－Ｓｎ－Ｂｉ－Ａｇ系の半田が用いられてきた。しかし、廃棄処分時にＰｂを含む半田を処理するのに手間がかかること、及び欧州でのＥＬＶ（廃棄自動車）指令、ＷＥＥＥ＆ＲｏＨＳ（廃棄電気電子機器）指令など各国でＰｂを含んだ半田の使用に対する規制が検討され始めていることから、車両用窓ガラスの端子の接合においても半田による接合以外の接合方法が要望されてきている。 In general, solder containing Pb, for example, Pb—Sn—Bi—Ag solder, has been used for joining a terminal to a feeding point. However, it takes time to process solder containing Pb at the time of disposal, and regulations on the use of solder containing Pb in various countries, such as the ELV (Discarded Vehicle) Directive and the WEEE & RoHS (Disposable Electrical and Electronic Equipment) Directive in Europe Therefore, there is a demand for a joining method other than soldering for joining the terminals of the vehicle window glass.
　一方、特許文献１には、導電成分と緩衝成分とを含み、Ｐｂを含まない半田を使用して端子を給電点に接合する技術が開示されている。しかし、この技術が適用されるガラス板は、熱的衝撃（サーマルショック）を与えても強度が低下しにくい強化ガラスを対象としている。
　つまり、強化されていない複数枚のガラス板を、樹脂製の中間膜を介して加熱圧着して構成される合わせガラスに特許文献１の技術を適用すると、半田が塗布されるガラス板の一部に、高温の半田に起因するサーマルショックによる残留応力が発生する。このため、合わせガラスのガラス板の強度が低下し、ガラス板が破損するという問題があった。よって、特許文献１の技術は、車両のウインドシールドである合わせガラスには適用することができなかった。 On the other hand, Patent Document 1 discloses a technique for joining a terminal to a feeding point using a solder containing a conductive component and a buffer component and not containing Pb. However, the glass plate to which this technology is applied is intended for tempered glass whose strength does not easily decrease even when a thermal shock is applied.
That is, when the technique of Patent Document 1 is applied to laminated glass that is formed by heat-pressing a plurality of unstrengthened glass plates through a resin intermediate film, a part of the glass plate to which solder is applied In addition, residual stress is generated due to thermal shock caused by high-temperature solder. For this reason, there existed a problem that the intensity | strength of the glass plate of a laminated glass fell and a glass plate was damaged. Therefore, the technique of Patent Document 1 cannot be applied to laminated glass that is a windshield of a vehicle.
ＷＯ　２００６／０１６５８８　Ａ１WO 2006/016588 A1
　本発明は、上述した事情に鑑みてなされたもので、半田を用いることなく導電体の給電点に端子を良好に接着することができる車両用窓ガラスの給電構造及び車両用窓ガラス並びに車両用窓ガラスの製造方法を提供することを目的とする。 The present invention has been made in view of the above-described circumstances. A power supply structure for a vehicle window glass, a vehicle window glass, and a vehicle capable of satisfactorily bonding a terminal to a power supply point of a conductor without using solder. It aims at providing the manufacturing method of a window glass.
　本発明によれば、前記目的を達成するために、車両用窓ガラスの面上に導電体が形成(conductor formed on a glass)されるとともに、該導電体の給電点(connecting points)に端子(terminal)が接続(connect)され、該端子を介して電流が前記導電体に供給される車両用窓ガラス(window glass for vehicles)の給電構造（Electrical connection structure）において、前記端子は、５０～１５０℃に加熱することにより硬化して、導電及び接着機能を発揮する導電性接着剤(conductive adhesive)によって前記給電点に接着(bond)されるとともに、接着部材によって車両用窓ガラスに固定(fix)されることを特徴とする車両用窓ガラスの給電構造を提供する。 According to the present invention, in order to achieve the above object, a conductor is formed on the surface of the vehicle window glass (conductor (formed on a glass), and terminals (connecting points) of the conductor are connected ( In a window-glass-for-vehicles power supply structure in which a terminal is connected and current is supplied to the conductor through the terminal, the terminals are 50-150 It is cured by heating to ° C., and is bonded to the feeding point by a conductive adhesive that exhibits a conductive and adhesive function, and is fixed to the vehicle window glass by an adhesive member. A power supply structure for a vehicle window glass is provided.
　本発明によれば、前記目的を達成するために、本発明の車両用窓ガラスの給電構造が搭載されたことを特徴とする車両用窓ガラスを提供する。 According to the present invention, in order to achieve the above object, there is provided a vehicle window glass characterized in that the vehicle window glass feeding structure of the present invention is mounted.
　本発明によれば、前記目的を達成するために、車両用窓ガラスの面上に導電体を形成する工程と、前記導電体の給電点に端子及び／または導電体上に導電性接着材を塗布する工程と、前記端子と前記導電体とを導電性接着材を介して仮固定する工程と、前記端子を接着部材によって車両用窓ガラスに固定する工程と、前記導電性接着材を５０～１５０℃の温度で１０分以上加熱する工程と、を備え、加熱によって、導電性接着材が導電及び接着機能を発揮し、前記導電性接着剤によって接着されるとともに、前記接着部材によって、前記端子が車両用窓ガラスに固定されることを特徴とする車両用窓ガラスの製造方法を提供する。 According to the present invention, in order to achieve the above object, a step of forming a conductor on the surface of the vehicle window glass, and a terminal and / or a conductive adhesive on the conductor at a feeding point of the conductor. A step of applying, a step of temporarily fixing the terminal and the conductor via a conductive adhesive, a step of fixing the terminal to a vehicle window glass with an adhesive member, and a step of Heating at a temperature of 150 ° C. for 10 minutes or more, and by heating, the conductive adhesive exhibits conductivity and an adhesive function, and is bonded by the conductive adhesive, and by the adhesive member, the terminal Is fixed to the window glass for vehicles, and the manufacturing method of the window glass for vehicles is provided.
　本発明によれば、半田による接合に代えて、導電性接着剤による端子の接着を実施する。この導電性接着剤は、５０～１５０℃に加熱することにより硬化して、導電及び接着機能を発揮する特質を持つ。つまり、本発明の車両用窓ガラスは、まず、車両用窓ガラスの面上に導電体を形成し、次に、導電体の給電点に端子を前記導電性接着剤によって仮保持し、次いで、端子を接着部材によって車両用窓ガラスに固定し、この後、この車両用窓ガラスを、５０～１５０℃の温度で１０分以上加熱して導電性接着剤を硬化させることにより製造される。 According to the present invention, the bonding of the terminal with the conductive adhesive is performed instead of the bonding with the solder. This conductive adhesive has the property of being cured by heating to 50 to 150 ° C. and exhibiting electrical conductivity and an adhesive function. That is, the vehicle window glass of the present invention first forms a conductor on the surface of the vehicle window glass, then temporarily holds the terminal at the power feeding point of the conductor with the conductive adhesive, The terminal is fixed to the vehicle window glass by an adhesive member, and then the vehicle window glass is heated at a temperature of 50 to 150 ° C. for 10 minutes or more to cure the conductive adhesive.
　前記接着部材は、導電性接着剤の接着力の補強と硬化するまでの端子の保持を目的としたものであり、５０～１５０℃の温度で１０分以上加熱しても接着性能が劣化しないものが好ましい。前記接着部材には前述の条件を満たす公知の樹脂が使用可能であるが、熱可塑性樹脂が好適に用いることができる。熱可塑性硬化樹脂としては、アクリル系樹脂やエチレン酢酸ビニル（ＥＶＡ）樹脂の粘着テープや、ポリエチレンテレフタレート（ＰＥＴ）樹脂とＥＶＡ樹脂の積層体の粘着テープやフィルムを例示できる。これにより、端子を給電点に十分な接着力で接着することができる。 The adhesive member is intended to reinforce the adhesive strength of the conductive adhesive and to hold the terminal until it is cured, and the adhesive performance does not deteriorate even when heated at a temperature of 50 to 150 ° C. for 10 minutes or more. Is preferred. Although the well-known resin which satisfy | fills the above-mentioned conditions can be used for the said adhesive member, a thermoplastic resin can be used suitably. Examples of the thermoplastic curable resin include an adhesive tape of acrylic resin or ethylene vinyl acetate (EVA) resin, and an adhesive tape or film of a laminate of polyethylene terephthalate (PET) resin and EVA resin. Thereby, a terminal can be adhere | attached with sufficient adhesive force to a feeding point.
　以上の如く、本発明によれば、半田を用いることなく導電体の給電点に端子を良好に接着することができ、また、半田を用いることなく導電体の給電点に端子を良好に接着した車両用窓ガラスを提供できる。 As described above, according to the present invention, it is possible to satisfactorily adhere the terminal to the feeding point of the conductor without using solder, and it is possible to favorably adhere the terminal to the feeding point of the conductor without using solder. A vehicle window glass can be provided.
　本発明の車両用窓ガラスとしては、強化ガラス、合わせガラスを適用することができる。強化ガラスの場合、製造工程に導電性接着剤を加熱するだけのための工程が増えるが、合わせガラスの場合は、中間膜を介して２枚のガラス板を加熱圧着する工程において、導電性接着剤を加熱することができる。このため、製造工程を増やすことなく製造できるという利点がある。 As the vehicle window glass of the present invention, tempered glass and laminated glass can be applied. In the case of tempered glass, the number of steps for heating the conductive adhesive is increased in the manufacturing process, but in the case of laminated glass, in the step of thermocompression bonding of two glass plates through an intermediate film, conductive bonding is performed. The agent can be heated. For this reason, there exists an advantage that it can manufacture, without increasing a manufacturing process.
　本発明によれば、前記導電性接着剤は、室温で液状のエポキシ樹脂と、室温で液状のフェノール樹脂と、反応性希釈剤と、イミダゾール化合物と、銀粉及び/または銀コート金属粉とを含有する１液無溶剤型導電性接着剤(One-component solvent-free conductive adhesive)であることが好ましい。なお、本発明において接着剤とは、恒久的に接着性能を発揮する汎用の接着剤に加え、再剥離性を備えた粘着（感圧接着）剤や接着時点では粘着剤的な性質を示す粘接着剤なども含むものとする。また、室温とは１０～４０℃を指すものとする。また、本発明における導電性接着剤に用いられる、室温で液状のエポキシ樹脂（以下、単に「エポキシ樹脂」とも記載する）は、バインダーとして導電性接着剤に含有されるものである。 According to the present invention, the conductive adhesive contains an epoxy resin that is liquid at room temperature, a phenol resin that is liquid at room temperature, a reactive diluent, an imidazole compound, and silver powder and / or silver-coated metal powder. It is preferable to use a one-component solvent-free conductive adhesive. In the present invention, an adhesive is a general-purpose adhesive that permanently exhibits adhesive performance, an adhesive (pressure-sensitive adhesive) having removability, and a viscosity that exhibits adhesive properties at the time of adhesion. Including adhesives. The room temperature refers to 10 to 40 ° C. In addition, an epoxy resin that is liquid at room temperature (hereinafter also simply referred to as “epoxy resin”) used for the conductive adhesive in the present invention is contained in the conductive adhesive as a binder.
　本発明における導電性接着剤に用いられる室温で液状のエポキシ樹脂は、後述する室温で液状のフェノール樹脂等と反応して硬化物を形成し、該硬化物は導電性を担う導電性金属粒子(conductive metal particles)のバインダーとして機能する。
　このようなエポキシ樹脂としては、概して芳香環を有する剛直な構造を有し、ビスフェノールＦ型のエポキシ樹脂、ビスフェノールＡ型のエポキシ樹脂、ウレタン変性エポキシ樹脂、ゴム変性エポキシ樹脂、ナフタレン系エポキシ樹脂、フェノールノボラック系エポキシ樹脂、ダイマー酸変性エポキシ樹脂、フタル酸エステル系エポキシ樹脂等が挙げられる。これらのエポキシ樹脂は、１種単独で用いてよく、２種以上を併用してもよい。 The epoxy resin that is liquid at room temperature used for the conductive adhesive in the present invention reacts with a liquid phenol resin or the like at room temperature to be described later to form a cured product, and the cured product is a conductive metal particle responsible for conductivity ( Acts as a binder for conductive metal particles).
Such epoxy resins generally have a rigid structure having an aromatic ring, and are bisphenol F type epoxy resins, bisphenol A type epoxy resins, urethane modified epoxy resins, rubber modified epoxy resins, naphthalene type epoxy resins, phenols. Examples include novolak epoxy resins, dimer acid-modified epoxy resins, and phthalate ester epoxy resins. These epoxy resins may be used alone or in combination of two or more.
　エポキシ樹脂の含有量は、当該導電性接着剤１００質量％中、２～１０質量％が好ましく、３～８質量％がより好ましい。エポキシ樹脂の含有量が、上記値より小さくなると、接着強度が弱くなり、接着剤として機能しにくくなる。一方、含有量の上記値より大きくなると、銀粉及び／または銀コート金属粉の接続が悪くなり、導電性が得られにくくなるおそれがある。 The content of the epoxy resin is preferably 2 to 10% by mass and more preferably 3 to 8% by mass in 100% by mass of the conductive adhesive. When the content of the epoxy resin is smaller than the above value, the adhesive strength becomes weak and it becomes difficult to function as an adhesive. On the other hand, when the content is larger than the above value, the connection of the silver powder and / or the silver-coated metal powder is deteriorated, and it may be difficult to obtain conductivity.
　本発明における導電性接着剤に用いられる、室温で液状のフェノール樹脂（以下、「液状フェノール樹脂」とも記載する）は、前記エポキシ樹脂の硬化剤として導電性接着剤に含有されるものである。液状フェノール樹脂は容易に他の各成分と混和するため、後述する反応性希釈剤の含有量を低減できる。その結果、導電性接着剤を硬化させた硬化物の接着強度を向上できる。また、液状フェノール樹脂を用いることで、導電性接着剤を無溶剤型の接着剤とすることができる。このような液状のフェノール樹脂としては、液状ノボラック型フェノール樹脂が挙げられる。 The phenol resin that is liquid at room temperature (hereinafter also referred to as “liquid phenol resin”) used for the conductive adhesive in the present invention is contained in the conductive adhesive as a curing agent for the epoxy resin. Since the liquid phenol resin is easily mixed with other components, the content of the reactive diluent described later can be reduced. As a result, the adhesive strength of the cured product obtained by curing the conductive adhesive can be improved. Moreover, a conductive adhesive can be made into a solventless type adhesive by using a liquid phenol resin. Examples of such a liquid phenol resin include a liquid novolac type phenol resin.
　上記の液状フェノール樹脂の含有量は、当該導電性接着剤１００質量％中、２～１０質量％が好ましく、３～８質量％がより好ましい。上記の液状フェノール樹脂の含有量が上記値より小さくなると、導電性接着剤の接着強度を十分に高めることができなくなる。一方、含有量が上記値より大きくなると、高温高湿下やヒートサイクル下での電気抵抗が上昇する。 The content of the above liquid phenol resin is preferably 2 to 10% by mass, more preferably 3 to 8% by mass in 100% by mass of the conductive adhesive. When content of said liquid phenol resin becomes smaller than the said value, it will become impossible to fully raise the adhesive strength of a conductive adhesive. On the other hand, when the content is larger than the above value, the electrical resistance under high temperature and high humidity or heat cycle increases.
　また、上記の液状フェノール樹脂は、前記エポキシ樹脂１００質量部に対して、５０～２５０質量部含まれることが好ましく、より好ましくは８０～１５０質量部である。エポキシ樹脂に対する、上記の液状フェノール樹脂の含有量が上記範囲内であれば、エポキシ樹脂（主剤）と上記の液状フェノール樹脂（硬化剤）の含有量のバランスが良好となり、導電性接着剤が硬化しやすくなり、接着強度も向上しやすくなる
　なお、本発明における導電性接着剤において、液状フェノール樹脂に該液状フェノール樹脂の特性を損なわない範囲内で、室温で固形のフェノール樹脂を１種類以上含有させてもよい。室温で固形のフェノール樹脂としては、クレゾールノボラック樹脂、ジシクロペンタジエン系フェノール樹脂、テルペン系フェノール樹脂、トリフェノールメタン系樹脂、フェノールアラルキル樹脂などが挙げられる。室温で固形のフェノール樹脂の含有量は、液状フェノール樹脂１００質量部に対して２０質量部以下が好ましい。 Further, the liquid phenol resin is preferably contained in an amount of 50 to 250 parts by mass, more preferably 80 to 150 parts by mass with respect to 100 parts by mass of the epoxy resin. If the content of the above-mentioned liquid phenol resin with respect to the epoxy resin is within the above range, the balance between the content of the epoxy resin (main agent) and the above-mentioned liquid phenol resin (curing agent) becomes good, and the conductive adhesive is cured. In addition, in the conductive adhesive in the present invention, the liquid phenol resin contains one or more types of phenol resins that are solid at room temperature within a range that does not impair the characteristics of the liquid phenol resin. You may let them. Examples of the phenol resin solid at room temperature include cresol novolac resin, dicyclopentadiene phenol resin, terpene phenol resin, triphenolmethane resin, and phenol aralkyl resin. The content of the phenol resin solid at room temperature is preferably 20 parts by mass or less with respect to 100 parts by mass of the liquid phenol resin.
　本発明における反応性希釈剤は、複数のグリシジル基を有する脂肪族の化合物または１個のグリシジル基と芳香環とを有する化合物であり、室温で液状の化合物である。 The reactive diluent in the present invention is an aliphatic compound having a plurality of glycidyl groups or a compound having one glycidyl group and an aromatic ring, and is a liquid compound at room temperature.
　後述するように、本発明における導電性接着剤は、導電性発現のための導電性金属粒子を多量に含むため、反応性希釈剤を用いることによって導電性金属粒子の分散状態を良好にできる。また、導電性接着剤の粘度を適切に調整できるので、取扱い性、作業性が向上する。 As will be described later, since the conductive adhesive in the present invention contains a large amount of conductive metal particles for developing conductivity, the use of a reactive diluent can improve the dispersion state of the conductive metal particles. Moreover, since the viscosity of a conductive adhesive can be adjusted appropriately, handling property and workability are improved.
　また、反応性希釈剤はグリシジル基を有するため、前記フェノール樹脂と反応しうる。よって、導電性接着剤の硬化時に硬化物の一部に取り込まれ、導電性金属粒子のバインダーとなる。 Also, since the reactive diluent has a glycidyl group, it can react with the phenol resin. Therefore, it is taken into a part of the cured product when the conductive adhesive is cured, and becomes a binder for the conductive metal particles.
　前記エポキシ樹脂が比較的剛直な構造を有するのに対し、反応性希釈剤は、柔軟な構造を有すること、またはグリシジル基を１個のみ有することにより、導電性接着剤が硬化してなる硬化物に柔軟性を与える。よって、前記エポキシ樹脂と反応性希釈剤を併用し、前記エポキシ樹脂と反応性希釈剤との配合割合を調整することにより、導電性接着剤が硬化してなる硬化物の硬度、弾性等を適切に調整できる。 Whereas the epoxy resin has a relatively rigid structure, the reactive diluent is a cured product obtained by curing the conductive adhesive by having a flexible structure or having only one glycidyl group. Gives flexibility. Therefore, by using the epoxy resin and the reactive diluent together, and adjusting the blending ratio of the epoxy resin and the reactive diluent, the hardness, elasticity, etc. of the cured product obtained by curing the conductive adhesive are adequate. Can be adjusted.
　反応性希釈剤としては、グリシジルオルトトルイジン、エチレングリコールジグリシジルエーテル、２－エチルヘキシルグリシジルエーテル、グリシジルメタクリエート、シクロヘキサンジメタノールジグリシジルエーテル、トリメチロールプロパントリグリシジルエーテル、ネオペンチルグリコールジグリシジルエーテル、フェニルグリシジルエーテル、ポリエチレングリコールジグリシジルエーテル、ポリプロピレングリコールジグリシジルエーテルなどが挙げられる。これら反応性希釈剤は１種単独で用いてもよく、２種以上を併用してもよい。 Reactive diluents include glycidyl orthotoluidine, ethylene glycol diglycidyl ether, 2-ethylhexyl glycidyl ether, glycidyl methacrylate, cyclohexanedimethanol diglycidyl ether, trimethylolpropane triglycidyl ether, neopentyl glycol diglycidyl ether, phenyl glycidyl ether Examples include ether, polyethylene glycol diglycidyl ether, and polypropylene glycol diglycidyl ether. These reactive diluents may be used alone or in combination of two or more.
　反応性希釈剤の含有量は、当該導電性接着剤１００質量％中、２～１０質量％が好ましく、３～８質量％がより好ましい。反応性希釈剤の含有量が上記値より小さくなると、導電性接着剤とした際の粘度が高くなり過ぎ、後述する銀粉及び／または銀コート金属粉の分散性が低下する。その結果、導電性接着剤が塗布しにくいものとなり、作業性が低下する。一方、含有量が上記値より大きくなると、接着剤の硬化物がもろくなり、接着強度が低下する。 The content of the reactive diluent is preferably 2 to 10% by mass and more preferably 3 to 8% by mass in 100% by mass of the conductive adhesive. When content of a reactive diluent becomes smaller than the said value, the viscosity at the time of setting it as a conductive adhesive will become high too much, and the dispersibility of the silver powder and / or silver coat metal powder which are mentioned later falls. As a result, the conductive adhesive is difficult to apply, and workability is reduced. On the other hand, when the content is larger than the above value, the cured product of the adhesive becomes brittle and the adhesive strength is lowered.
　本発明におけるイミダゾール化合物は、硬化促進剤として導電性接着剤に含有させる。イミダゾール化合物が含まれると、導電性接着剤の硬化性が良好となり、その結果、硬化物の耐熱性が向上する。このようなイミダゾール化合物としては、２－フェニルイミダゾール、２－ウンデシルイミダゾール、２－フェニル－４、５－ジヒドロキシメチルイミダゾール、２－フェニル－４－メチル－５－ヒドロキシメチルイミダゾール、４、４´－メチレンビス（２－エチル－メチルイミダゾール）、２－ヘプタデシルイミダゾール等のイミダゾ－ル系エポキシ硬化促進剤などが挙げられる。これらイミダゾール化合物は、１種単独で用いてもよく、２種以上を併用してもよい。 The imidazole compound in the present invention is contained in a conductive adhesive as a curing accelerator. When the imidazole compound is contained, the curability of the conductive adhesive becomes good, and as a result, the heat resistance of the cured product is improved. Examples of such imidazole compounds include 2-phenylimidazole, 2-undecylimidazole, 2-phenyl-4,5-dihydroxymethylimidazole, 2-phenyl-4-methyl-5-hydroxymethylimidazole, 4, 4′- Examples include imidazole-based epoxy curing accelerators such as methylenebis (2-ethyl-methylimidazole) and 2-heptadecylimidazole. These imidazole compounds may be used alone or in combination of two or more.
　イミダゾール化合物の含有量は、当該導電性接着剤１００質量％中、０．５～５質量％が好ましく、１～４質量％がより好ましい。イミダゾール化合物の含有量が上記値より小さくなると、硬化性が低下する。一方、含有量が上記値より大きくなると、反応性が速くなり、貯蔵安定性が悪くなる。 The content of the imidazole compound is preferably 0.5 to 5% by mass and more preferably 1 to 4% by mass in 100% by mass of the conductive adhesive. When content of an imidazole compound becomes smaller than the said value, sclerosis | hardenability will fall. On the other hand, when the content is larger than the above value, the reactivity becomes faster and the storage stability becomes worse.
　導電性金属粒子としては、銀粉、及び銀コート金属粉のうち少なくとも一方を使用することが好ましい。銀コート金属粉としては、例えば、銅粉に銀めっきを施した銀めっき銅粉、ニッケル粉に銀めっきを施した銀めっきニッケル粉などが使用できる。銀粉、及び銀コート金属粉の形状は、略球形であっても、フレーク状であってもよいが、フレーク状が好ましい。マイクロトラックによる５０％径は、導電性の点から、１～２０μｍが好ましく、３～１５μｍがさらに好ましい。銀粉及び／または銀コート金属粉の含有量は、当該導電性接着剤１００質量％、７０～９２質量％が好ましく、７５～９０質量％がより好ましい。銀粉及び／または銀コート金属粉の含有量が上記値より小さくなると、銀粉及び／または銀コート金属粉の接続が悪くなり、導電性が得られにくくなる。一方、含有量が上記値より大きくなると、接着強度が弱くなると共に、必要以上にコストが上がってしまう。なお、導電性金属粒子としては、銀粉及び／または銀コート金属粉の他に、ニッケル粉、銅粉などの他の粒子を、接着性や導電性などの特性が損なわれない範囲で併用してもよい。 As the conductive metal particles, it is preferable to use at least one of silver powder and silver-coated metal powder. As a silver coat metal powder, the silver plating copper powder which silver-plated copper powder, the silver plating nickel powder which silver-plated nickel powder, etc. can be used, for example. The silver powder and the silver-coated metal powder may have a substantially spherical shape or a flake shape, but a flake shape is preferred. The 50% diameter by Microtrack is preferably 1 to 20 μm, more preferably 3 to 15 μm from the viewpoint of conductivity. The content of the silver powder and / or silver-coated metal powder is preferably 100% by mass, 70 to 92% by mass, more preferably 75 to 90% by mass. When content of silver powder and / or silver coat metal powder becomes smaller than the said value, the connection of silver powder and / or silver coat metal powder will worsen, and it will become difficult to obtain electroconductivity. On the other hand, when the content is larger than the above value, the adhesive strength becomes weak and the cost increases more than necessary. As conductive metal particles, in addition to silver powder and / or silver-coated metal powder, other particles such as nickel powder and copper powder are used in combination as long as the properties such as adhesion and conductivity are not impaired. Also good.
　また、銀粉及び／または銀コート金属粉と、樹脂成分（すなわち、前記エポキシ樹脂及び前記液状フェノール樹脂の合計）の質量比（固形分比）は、銀粉及び／または銀コート金属粉：樹脂成分＝８０：２０～９６：４が好ましく、８５：１５～９３：７がより好ましい。
　銀粉及び／または銀コート金属粉と、樹脂成分との質量比が上記範囲内であれば、本導電性接着剤から得られる硬化物が導電性、接着強度ともに優れた硬化物となる。 The mass ratio (solid content ratio) of the silver powder and / or silver-coated metal powder and the resin component (that is, the total of the epoxy resin and the liquid phenol resin) is: silver powder and / or silver-coated metal powder: resin component = 80:20 to 96: 4 is preferable, and 85:15 to 93: 7 is more preferable.
If the mass ratio of the silver powder and / or the silver-coated metal powder and the resin component is within the above range, the cured product obtained from the conductive adhesive is a cured product excellent in both conductivity and adhesive strength.
　本発明における導電性接着剤は、前記の各成分をロールミル等によって混合することによって調製できる。これにより、５０～１５０℃、好ましくは８０～１３０℃で硬化して、導電及び接着機能を発揮する導電性接着剤を提供することができる。 The conductive adhesive in the present invention can be prepared by mixing the above-described components with a roll mill or the like. As a result, it is possible to provide a conductive adhesive that cures at 50 to 150 ° C., preferably 80 to 130 ° C., and exhibits electrical conductivity and an adhesive function.
　本発明によれば、前記端子、及び前記接着部材は、防水加工部材によって前記車両用窓ガラスに封着されることが好ましい。具体的には、端子及び接着部材が取り付けられているガラス板側にプライマー(Primer)を塗布し、シーリング材であるシリコーンシーラント（silicone　sealant）を打設する。このシリコーンシーラントは室温にて５時間～５日で硬化する。これにより、給電点、端子、及び接着部材の防水性が向上する。また、ホットメルト接着剤などの熱硬化性の樹脂により封着することもできる。 According to the present invention, it is preferable that the terminal and the adhesive member are sealed to the vehicle window glass by a waterproof member. Specifically, a primer is applied to the glass plate side to which the terminal and the adhesive member are attached, and a silicone sealant as a sealing material is placed. This silicone sealant cures at room temperature in 5 hours to 5 days. Thereby, the waterproofness of a feeding point, a terminal, and an adhesive member improves. It can also be sealed with a thermosetting resin such as a hot melt adhesive.
　本発明によれば、前記端子に給電される電流値が１～３０Ａに設定することができ、前記端子の通電側と前記給電点に接着された導電体との間の電気抵抗値が１００ｍΩ以下であることが好ましい。給電部に通電して防曇や所望の加熱性能を得るための電流を確保し、同時に給電点の加熱を防止して接着強度や導電性を担保できるからである。 According to the present invention, the current value supplied to the terminal can be set to 1 to 30 A, and the electric resistance value between the current-carrying side of the terminal and the conductor bonded to the power-feeding point is 100 mΩ or less. It is preferable that This is because it is possible to secure current for energizing the power feeding portion to obtain anti-fogging and desired heating performance, and at the same time to prevent heating of the power feeding point and ensure adhesive strength and conductivity.
　本発明によれば、１０Ａの電流を前記端子に３０分間供給した時の該端子の温度が８０℃以下であり、該端子の前記給電点に対する接着強度が７９Ｎ以上であることが好ましい。 According to the present invention, it is preferable that the temperature of the terminal when a current of 10 A is supplied to the terminal for 30 minutes is 80 ° C. or less, and the adhesive strength of the terminal to the feeding point is 79 N or more.
　一般に強化ガラスを用いる車両のリアガラスには、防曇用ヒーターが形成される。一方で合わせガラスは、主に車両のウインドシールドに適用され、ウインドシールドには、防曇用に加えてワイパーブレートの加熱用熱線としての導電体が形成されることがある。これらの加熱用熱線は、アンテナなどの微弱電流が供給される導電体と比較して、大電流が供給されるため、端子と給電点との間の電気抵抗によって端子が昇温する。この端子の昇温を抑制しなければ、ガラス板自体にサーマルショックを与えるおそれがあるとともに、その近傍に配置された回路部品や樹脂部品に悪影響を与える。このため、端子の昇温に関し一定の評価基準が設定されている。その評価基準は、１０Ａの電流を端子に３０分間供給したときの端子の温度が８０℃以下というものである。また、その温度（８０℃以下）を達成するには、前記端子の通電側と前記給電点に接着された導電体との間の電気抵抗値が、１００ｍΩ以下であることが好ましい。また、回路の大きさと発熱量を考慮して、未強化のガラス板を用いる合わせガラスに供給される電流値は１～１０Ａに設定することが好ましく、強化ガラスの場合には１０～３０Ａに設定することが好ましい。 Generally, an anti-fogging heater is formed on the rear glass of a vehicle using tempered glass. On the other hand, laminated glass is mainly applied to a windshield of a vehicle, and a conductor as a heating wire for heating a wiper blade may be formed on the windshield in addition to antifogging. Since these heating hot wires are supplied with a large current as compared with a conductor to which a weak current such as an antenna is supplied, the temperature of the terminal rises due to the electrical resistance between the terminal and the feeding point. If the temperature rise of this terminal is not suppressed, there is a risk of giving a thermal shock to the glass plate itself, and adversely affects circuit components and resin components arranged in the vicinity thereof. For this reason, a certain evaluation standard is set for the temperature rise of the terminal. The evaluation standard is that the temperature of the terminal is 80 ° C. or less when a current of 10 A is supplied to the terminal for 30 minutes. In order to achieve the temperature (80 ° C. or less), it is preferable that the electric resistance value between the current-carrying side of the terminal and the conductor bonded to the feeding point is 100 mΩ or less. In consideration of the size of the circuit and the amount of heat generated, the current value supplied to the laminated glass using the unstrengthened glass plate is preferably set to 1 to 10 A, and in the case of tempered glass, it is set to 10 to 30 A. It is preferable to do.
　一方、接着強度とは、端子の引張強度であり、給電点に対して端子をガラス面内方向に引っ張って、端子が給電点から剥離したときの引張強度である。具体的には、導電性接着剤が硬化した端子を、ガラス板の面内方向にプッシュプルゲージを介して引っ張り、端子が給電点から剥離したときの数値を、プッシュプルゲージにより測定した値である。この評価基準として、７９Ｎ以上であることが設定され、本発明の車両用窓ガラスの給電構造は、その評価基準を上回ることができる。 On the other hand, the adhesive strength is the tensile strength of the terminal, and is the tensile strength when the terminal is pulled away from the feeding point by pulling the terminal in the in-glass direction. Specifically, the terminal with the conductive adhesive cured is pulled in the in-plane direction of the glass plate via a push-pull gauge, and the value when the terminal peels from the feeding point is a value measured with the push-pull gauge. is there. As this evaluation standard, it is set as 79 N or more, and the feeding structure of the vehicle window glass of the present invention can exceed the evaluation standard.
　本発明によれば、前記車両用窓ガラスの給電点近傍の歪みゲージによる測定法での破壊強度が６０ＭＰａ以上であることが好ましい。具体的には、車両用窓ガラスの給電構造部の裏面に錘を落下させ、車両用窓ガラスが破損したときの錘の落下高さから破壊強度を評価する。本発明の車両用窓ガラスの給電構造は、その評価基準を上回ることができる。 According to the present invention, it is preferable that the breaking strength measured by a strain gauge near the feeding point of the vehicle window glass is 60 MPa or more. Specifically, the weight is dropped on the back surface of the vehicle window glass feeding structure, and the breaking strength is evaluated from the falling height of the weight when the vehicle window glass is broken. The vehicle window glass feeding structure of the present invention can exceed the evaluation standard.
　本発明に係る車両用窓ガラスの給電構造、及び車両用窓ガラスの製造方法によれば、半田を用いることなく導電体の給電点に端子を良好に接着することができ、また、半田を用いることなく導電体の給電点に端子を良好に接着した車両用窓ガラスを提供できる。その結果、本発明においては、Ｐｂを含有した半田や半田付けに用いる酸化性のフラックスを用いないため、有害物質を使用することなく取り付けが可能で、取付け時や使用中にＶＯＣ(volatile organic compounds)の発生も少ない、環境にやさしい端子取付け構造を実現できる。 According to the vehicle window glass power feeding structure and the vehicle window glass manufacturing method according to the present invention, the terminal can be satisfactorily bonded to the power feeding point of the conductor without using solder, and solder is used. The window glass for vehicles in which the terminal is satisfactorily bonded to the power feeding point of the conductor can be provided. As a result, in the present invention, since solder containing Pb or oxidizing flux used for soldering is not used, it can be mounted without using harmful substances, and VOC (volatile organic organic compounds) can be used during or during mounting. ) Can be realized, and an environmentally friendly terminal mounting structure can be realized.
実施の形態の車両用窓ガラスが適用されたウインドシールドの平面図である。It is a top view of the windshield to which the window glass for vehicles of embodiment was applied. 図１のＡ－Ａ線に沿う断面図である。FIG. 2 is a cross-sectional view taken along line AA in FIG. 実施の形態のウインドシールドの給電構造を示した斜視図である。It is the perspective view which showed the electric power feeding structure of the windshield of embodiment. 実施の形態のウインドシールドの製造工程を示した説明図である。It is explanatory drawing which showed the manufacturing process of the windshield of embodiment.
　以下、添付図面に従って、本発明に係る車両用窓ガラスの給電構造及び車両用窓ガラス並びに車両用窓ガラスの製造方法の好ましい実施の形態を詳説する。 Hereinafter, preferred embodiments of a vehicle window glass feeding structure, a vehicle window glass, and a vehicle window glass manufacturing method according to the present invention will be described in detail with reference to the accompanying drawings.
　図１は、実施の形態の車両用窓ガラスが適用された車両用ウインドシールド（以下、ウインドシールドと略称する）１０の平面図であり、図２は、図１のＡ－Ａ線に沿う断面図であり、実施の形態の給電構造を示した拡大断面図である。なお、実施の形態では、車両用窓ガラスとして合わせガラスであるウインドシールド１０を例示するが、ウインドシールドに限定されるものではなく、リアガラス、サイドガラス、ルーフガラスなどにも適用できる。また、合わせガラスに限定されるものではなく、強化ガラスやガラスの破壊強度を一般の強化ガラスよりも低く設計したガラス板（所謂半強化ガラス）、１枚のガラスで構成されガラス板に機能性フィルムなどを貼着したフィルム付きガラス（所謂バイレイヤーガラス）にも適用することができる。また、本発明の給電構造は、給電点近傍の破壊強度の十分高い強化ガラスに適用しても、その有害物、ＶＯＣの削減などの本発明の効果を損するものではない。 FIG. 1 is a plan view of a vehicle windshield (hereinafter abbreviated as “windshield”) 10 to which the vehicle window glass of the embodiment is applied, and FIG. 2 is a cross-sectional view taken along the line AA of FIG. It is a figure and is an expanded sectional view showing the electric supply structure of an embodiment. In addition, in embodiment, although the windshield 10 which is a laminated glass is illustrated as a window glass for vehicles, it is not limited to a windshield, It can apply also to a rear glass, a side glass, a roof glass, etc. Moreover, the glass plate is not limited to laminated glass, and is composed of a glass plate (so-called semi-tempered glass) designed to have a lower puncture strength of tempered glass or glass than general tempered glass. The present invention can also be applied to glass with a film to which a film or the like is attached (so-called bilayer glass). Moreover, even if the power feeding structure of the present invention is applied to a tempered glass having a sufficiently high breaking strength in the vicinity of the power feeding point, the effects of the present invention such as reduction of harmful substances and VOC are not impaired.
　本発明に用いられる１枚の板ガラスの厚さとしては、車両用のガラスに用いられるガラス基板として、１～６ｍｍが望ましい。さらに１～２．３ｍｍであれば、車両用合わせガラス用の基板として好適であり、１．８ｍｍ以下であれば、さらに合わせガラスの軽量化にも寄与する。２．３～６ｍｍであれば、強化ガラスの基板として適用が可能であり、また給電点近傍の破壊強度も維持しやすい。さらに２．５～３．５ｍｍであれば、汎用の車両用の強化ガラス製造装置にて製造できてコスト的に有利である。また、３ｍｍ以下であれば強化ガラスの軽量化への寄与が大きい。 The thickness of one plate glass used in the present invention is preferably 1 to 6 mm as a glass substrate used for vehicle glass. Further, if the thickness is 1 to 2.3 mm, it is suitable as a substrate for laminated glass for vehicles, and if it is 1.8 mm or less, it further contributes to the weight reduction of the laminated glass. If it is 2.3 to 6 mm, it can be applied as a tempered glass substrate, and the breaking strength in the vicinity of the feeding point can be easily maintained. Furthermore, if it is 2.5-3.5 mm, it can manufacture with the tempered glass manufacturing apparatus for general purpose vehicles, and it is advantageous in cost. Moreover, if it is 3 mm or less, the contribution to the weight reduction of tempered glass is large.
　図１に示すようにウインドシールド１０の周辺部には、所謂「黒セラ」と称される遮蔽層１２が帯状に形成されている。この遮蔽層１２は、例えば、黒セラ印刷用インクをガラス面に塗布し、これを焼き付けることにより形成される。この遮蔽層１２によって、ウインドシールド１０の周辺部に黒色不透明層が形成され、この黒色不透明層によって、ウインドシールド１０をその周辺で保持しているウレタンシーラントの紫外線による劣化が防止されるとともに、ウインドシールド１０の周辺に取り付けられている導電体１４の図２に示す給電点１６、及び端子１８などが車外から透視できないようになっている。 As shown in FIG. 1, a shielding layer 12 called “black sera” is formed in a band shape around the windshield 10. The shielding layer 12 is formed, for example, by applying black sera printing ink on a glass surface and baking it. The shielding layer 12 forms a black opaque layer around the windshield 10. The black opaque layer prevents deterioration of the urethane sealant holding the windshield 10 in the vicinity thereof due to ultraviolet rays, and wind. The feeding point 16 and the terminal 18 shown in FIG. 2 of the conductor 14 attached around the shield 10 cannot be seen through from the outside of the vehicle.
　なお、図２において遮蔽層１２は省略しているが、この遮蔽層１２は、ウインドシールド１０を構成する車外側のガラス板２０の周辺部に形成され、この遮蔽層１２の表層に導電体１４が形成されている。この導電体１４は、ウインドシールド１０のワイパーブレード（不図示）を加熱する電熱線であり、車体側の電源部であるバッテリから大電流（１Ａ以上）が供給される。また、この導電体１４は、導電性銀ペーストを遮蔽層１２上にスクリーン印刷したり、導電性トナーを電子印刷したりして塗布した後、焼き付けることにより形成される。 Although the shielding layer 12 is omitted in FIG. 2, the shielding layer 12 is formed in the periphery of the glass plate 20 outside the vehicle constituting the windshield 10, and the conductor 14 is formed on the surface layer of the shielding layer 12. Is formed. The conductor 14 is a heating wire that heats a wiper blade (not shown) of the windshield 10, and a large current (1 A or more) is supplied from a battery that is a power supply unit on the vehicle body side. In addition, the conductor 14 is formed by applying a conductive silver paste on the shielding layer 12 by screen printing or applying a conductive toner by electronic printing, and then baking.
　図２において、符号２２は、ウインドシールド１０を構成する車内側のガラス板であり、このガラス板２２とガラス板２０とでＰＶＢ（ポリビニルブチラール樹脂）などの樹脂からなる中間膜２４を挟み込んで形成される。ガラス板２２と中間膜２４の積層体は、オートクレーブ装置にて加熱圧着（加熱条件：１３０℃、１５分）することによりウインドシールド１０である合わせガラスに構成される。
　また、符号２６は、給電点１６に端子１８を接着する導電性接着剤（後述する）であり、符号２８は、端子１８をガラス板２０に接着する粘着テープ（接着部材）であり、符号３０は、端子１８及び粘着テープ２８を封止するシリコーンシーラント（防水加工部材）である。このシリコーンシーラント３０は、図３に示す車内側のガラス板２２に予め形成された円弧状の切欠部２３、すなわち、車外側のガラス板２０に形成された給電点１６を露出するために形成された切欠部２３を埋めるように接着される。これにより、給電点１６、端子１８、及び粘着テープ２８がシリコーンシーラント３０によって封着されるので、給電点１６、端子１８、及び粘着テープ２８が隠ぺいされて給電構造の防水性が向上する。 In FIG. 2, reference numeral 22 denotes a glass plate inside the vehicle constituting the windshield 10, and is formed by sandwiching an intermediate film 24 made of a resin such as PVB (polyvinyl butyral resin) between the glass plate 22 and the glass plate 20. Is done. The laminated body of the glass plate 22 and the intermediate film 24 is comprised in the laminated glass which is the windshield 10 by carrying out thermocompression bonding (heating conditions: 130 degreeC, 15 minutes) with an autoclave apparatus.
Reference numeral 26 denotes a conductive adhesive (described later) for bonding the terminal 18 to the feeding point 16, and reference numeral 28 denotes an adhesive tape (adhesive member) for bonding the terminal 18 to the glass plate 20. Is a silicone sealant (waterproofing member) that seals the terminal 18 and the adhesive tape 28. This silicone sealant 30 is formed to expose the arc-shaped cutout portion 23 formed in advance on the glass plate 22 on the vehicle interior side shown in FIG. 3, that is, the feeding point 16 formed on the glass plate 20 on the vehicle exterior side. Bonded so as to fill the notch 23. Thereby, since the feeding point 16, the terminal 18, and the adhesive tape 28 are sealed by the silicone sealant 30, the feeding point 16, the terminal 18 and the adhesive tape 28 are concealed, and the waterproofness of the feeding structure is improved.
　一方、実施の形態の導電性接着剤２６は、５０～１５０℃に加熱することにより硬化させて導電及び接着機能を発揮する特質を持つ。 On the other hand, the conductive adhesive 26 according to the embodiment has the property of being cured by heating to 50 to 150 ° C. and exhibiting a conductive and adhesive function.
　図４には、ウインドシールド１０の製造工程が示されている。 FIG. 4 shows the manufacturing process of the windshield 10.
　この製造工程によれば、まず、ウインドシールド１０のサイズに切断加工された、曲げ成形前のガラス板２０（２２）を洗浄部３２によって洗浄する。なお、車内側のガラス板２２は、この時点で切欠部２３が既に形成されている。 According to this manufacturing process, first, the glass plate 20 (22) before being bent and cut to the size of the windshield 10 is cleaned by the cleaning unit 32. Note that the notch 23 has already been formed on the glass plate 22 inside the vehicle at this point.
　次に、洗浄されたガラス板２０（２２）を曲げ成形炉３４に搬入し、ここで曲げ成形可能な温度にガラス板２０（２２）を加熱するとともに、プレス装置、又は自重によりウインドシールドの曲面に沿った曲率に曲げ成形する。なお、車外側のガラス板２０は、曲げ成形前に遮蔽層１２、及び導電体１４が予め塗布されており、曲げ成形炉３４の熱により遮蔽層１２、及び導電体１４がガラス板２０に焼き付けられる。 Next, the cleaned glass plate 20 (22) is carried into a bending furnace 34 where the glass plate 20 (22) is heated to a temperature at which bending can be performed, and the curved surface of the windshield is pressed by a press device or by its own weight. Bend to a curvature along The glass layer 20 on the outside of the vehicle is pre-coated with the shielding layer 12 and the conductor 14 before bending, and the shielding layer 12 and the conductor 14 are baked onto the glass plate 20 by the heat of the bending furnace 34. It is done.
　次いで、曲げ成形されたガラス板２０（２２）を、洗浄部３６によって洗浄した後、中間膜挿入部３８において、車外側のガラス板２２に車内側のガラス板２２を、中間膜２４を介して重ね合わせる。これにより、車内側のガラス板２２の切欠部２３から給電点１６が露出する。 Next, the bent glass plate 20 (22) is cleaned by the cleaning unit 36, and then, in the intermediate film insertion unit 38, the glass plate 22 on the vehicle inner side is connected to the glass plate 22 on the vehicle outer side via the intermediate film 24. Overlapping. Thereby, the feeding point 16 is exposed from the notch 23 of the glass plate 22 inside the vehicle.
　そして、オートクレーブ装置４０による加熱圧着工程の前工程で、端子１８を導電性接着剤２６によって給電点１６に接着し、更に、端子１８を粘着テープ２８によってガラス板２０に接着する。この状態で中間膜２４を挟んだガラス板２０、及びガラス板２２をオートクレーブ装置４０に搬入し、１３０℃、１５分の加熱条件で加熱圧着する。これにより、合わせガラスであるウインドシールド１０が製造されるとともに、オートクレーブ装置の熱により導電性接着剤２６が硬化し、導電及び接着機能を発揮する。 Then, in the pre-process of the thermocompression bonding process by the autoclave device 40, the terminal 18 is bonded to the feeding point 16 with the conductive adhesive 26, and further the terminal 18 is bonded to the glass plate 20 with the adhesive tape 28. In this state, the glass plate 20 and the glass plate 22 sandwiching the intermediate film 24 are carried into the autoclave device 40 and thermocompression bonded under heating conditions of 130 ° C. for 15 minutes. Thereby, while the windshield 10 which is a laminated glass is manufactured, the conductive adhesive 26 hardens | cures with the heat | fever of an autoclave apparatus, and an electroconductivity and an adhesive function are exhibited.
　そして、次工程で、粘着テープ２８の表面にプライマーを塗布し、その上からシリコーンシーラント３０を、切欠部２３の凹部を埋めるように打設する。このシリコーンシーラント３０は室温にて２４時間で硬化する。これにより、給電点１６、端子１８、及び粘着テープ２８の防水性が向上される。 Then, in the next step, a primer is applied to the surface of the adhesive tape 28, and a silicone sealant 30 is placed thereon so as to fill the recess of the notch 23. This silicone sealant 30 cures at room temperature in 24 hours. Thereby, the waterproofness of the feeding point 16, the terminal 18, and the adhesive tape 28 is improved.
　粘着テープ２８は、導電性接着剤２６の接着力の補強と硬化するまでの端子１８の保持を目的としたものであり、５０～１５０℃の温度で１０分以上加熱しても性能が劣化しないアクリル系樹脂のテープ、例えば、綜研化学社製の商品名「Ｊ－７７１０」を例示できる。これにより、端子１８を給電点１６に十分な接着力で接着することができる。 The pressure-sensitive adhesive tape 28 is intended to reinforce the adhesive force of the conductive adhesive 26 and hold the terminal 18 until it is cured, and its performance does not deteriorate even when heated at a temperature of 50 to 150 ° C. for 10 minutes or more. Acrylic resin tape, for example, trade name “J-7710” manufactured by Soken Chemical Co., Ltd. can be exemplified. Thereby, the terminal 18 can be bonded to the feeding point 16 with a sufficient adhesive force.
　したがって、実施の形態の給電構造によれば、半田を用いることなく導電体１４の給電点１６に端子１８を良好に接着することができる。また、半田を用いることなく給電点１６に端子１８を良好に接着したウインドシールド１０を提供できる。 Therefore, according to the power supply structure of the embodiment, the terminal 18 can be satisfactorily bonded to the power supply point 16 of the conductor 14 without using solder. Further, it is possible to provide the windshield 10 in which the terminal 18 is favorably bonded to the feeding point 16 without using solder.
　実施の形態の導電性接着剤２６は、室温で液状のエポキシ樹脂としてビスフェノールＦ型エポキシ樹脂（ジャパンエポキシレジン社製、「Ｅｐ８０６」）４質量部と、室温で液状のフェノール樹脂として液状ノボラック型フェノール樹脂（明和化成社製、「ＭＥＨ８００５」）４質量部と、反応性希釈剤としてグリシジルオルトトルイジン（日本化薬社製、「ＧＯＴ」）３質量部と、イミダゾール化合物（硬化促進剤）としてイミダゾール系エポキシ硬化促進剤（四国化成工業社製、「２ＰＺ」）２質量部と、導電性金属粒子として、フレーク銀粉（福田金属箔粉工業社製、「ＡｇＣ－ＧＳ」）５０質量部とであり、これらの材料をロールミルで混合して、得られたものである。 The conductive adhesive 26 according to the embodiment includes 4 parts by mass of a bisphenol F type epoxy resin (manufactured by Japan Epoxy Resin Co., “Ep806”) as a liquid epoxy resin at room temperature, and a liquid novolac type phenol as a liquid phenol resin at room temperature. 4 parts by mass of resin (Maywa Kasei Co., Ltd., “MEH8005”), 3 parts by mass of glycidyl orthotoluidine (Nippon Kayaku Co., Ltd., “GOT”) as a reactive diluent, and imidazole compound as an imidazole compound (curing accelerator) 2 parts by mass of an epoxy curing accelerator (“2PZ” manufactured by Shikoku Kasei Kogyo Co., Ltd.) and 50 parts by mass of flake silver powder (“AgC-GS” manufactured by Fukuda Metal Foil Co., Ltd.) as conductive metal particles, These materials are obtained by mixing with a roll mill.
　これにより、５０～１５０℃に加熱することにより硬化して導電及び接着機能を発揮する導電性接着剤を提供することができる。 Thereby, it is possible to provide a conductive adhesive that is cured by heating to 50 to 150 ° C. and exhibits conductivity and an adhesive function.
　また、本発明の実施の形態では、端子１８に給電される電流値が１～３０Ａであり、端子１８と給電点１６との間の電気抵抗値、すなわち、硬化した導電性接着剤２６の電気抵抗値が１００ｍΩ以下であることが好ましい。 In the embodiment of the present invention, the current value supplied to the terminal 18 is 1 to 30 A, and the electrical resistance value between the terminal 18 and the power supply point 16, that is, the electricity of the cured conductive adhesive 26. The resistance value is preferably 100 mΩ or less.
　このとき、電流値は直流電源装置（高砂製作所社製）の設定値である。このときの端子の接着面積は、４ｍｍ角（１６ｍｍ２）であり、導電性接着材の厚みは０．１～０．３ｍｍとなるように固定した。また、電気抵抗値は、端子の通電側に接着された給電線と前記給電点に接着された導電体との間の値を給電構造の抵抗値として測定している。電気抵抗値は、公知の方法で測定することができるが、ここでは、ミリオームハイテスタ（日置エンジニアリングサービス社製）によって測定を行った。 At this time, the current value is a set value of the DC power supply (manufactured by Takasago Seisakusho). At this time, the bonding area of the terminals was 4 mm square (16 mm 2 ), and the thickness of the conductive adhesive was fixed to 0.1 to 0.3 mm. In addition, the electrical resistance value is measured as a resistance value of the power supply structure by a value between the power supply line bonded to the power supply side of the terminal and the conductor bonded to the power supply point. The electrical resistance value can be measured by a known method. Here, the electrical resistance value was measured by a milliohm high tester (manufactured by Hioki Engineering Service Co., Ltd.).
　更に、１０Ａの電流を端子１８に３０分間供給した時の端子１８の温度は８０℃以下であり、端子１８の給電点１６に対する接着強度は７９Ｎ以上であることが好ましく、さらに好ましくは１２０Ｎ以上である。 Furthermore, the temperature of the terminal 18 when a current of 10 A is supplied to the terminal 18 for 30 minutes is 80 ° C. or less, and the adhesive strength of the terminal 18 to the feeding point 16 is preferably 79 N or more, more preferably 120 N or more. is there.
　実施の形態の導電体１４は、アンテナなどの微弱電流が供給される導電体と比較して、大電流が供給されるため、端子１８と給電点１６との間の電気抵抗によって端子１８が昇温する。この端子１８の昇温を抑制しなければ、ガラス板２０、及びガラス板２２自体にサーマルショックを与えるおそれがあるとともに、その近傍に配置された回路部品や樹脂部品に悪影響を与えるおそれがあるため、一定の評価基準が設定されている。その評価基準は、１０Ａの電流を端子に３０分間供給したときの端子の温度が８０℃以下というものである。また、その温度（８０℃以下）を達成するには、端子と給電点との間の電気抵抗値が１００ｍΩ以下であることが好ましく、さらに好ましくは５０ｍΩ以下である。 Since the conductor 14 of the embodiment is supplied with a larger current than a conductor such as an antenna to which a weak current is supplied, the terminal 18 rises due to the electrical resistance between the terminal 18 and the feeding point 16. Warm up. If the temperature rise of the terminal 18 is not suppressed, the glass plate 20 and the glass plate 22 themselves may be subjected to thermal shock, and may adversely affect circuit components and resin components disposed in the vicinity thereof. A certain evaluation standard is set. The evaluation standard is that the temperature of the terminal is 80 ° C. or less when a current of 10 A is supplied to the terminal for 30 minutes. In order to achieve the temperature (80 ° C. or lower), the electrical resistance value between the terminal and the feeding point is preferably 100 mΩ or less, and more preferably 50 mΩ or less.
　実施の形態の給電構造によれば、端子１８に１０Ａを３０分間供給したときの端子１８の温度は５０℃であり、評価基準を満足した。 According to the power feeding structure of the embodiment, the temperature of the terminal 18 when 10 A was supplied to the terminal 18 for 30 minutes was 50 ° C., which satisfied the evaluation criteria.
　なお、サーマルショックを考慮して合わせガラスに供給される電流値は、１～１０Ａが好ましく、強化ガラスの場合には１０～３０Ａであることが好ましい。 In consideration of thermal shock, the current value supplied to the laminated glass is preferably 1 to 10A, and in the case of tempered glass, it is preferably 10 to 30A.
　一方、接着強度とは、端子１８の引張強度であり、給電点１６に対して端子１８をガラス面内方向に引っ張って、端子１８が給電点１６から剥離したときの引張強度である。 On the other hand, the adhesive strength is the tensile strength of the terminal 18 and is the tensile strength when the terminal 18 is pulled from the feeding point 16 by pulling the terminal 18 in the glass in-plane direction.
　具体的には、導電性接着剤２６が硬化した端子１８を、ガラス板２０の面内方向にプッシュプルゲージを介して引っ張り、端子１８が給電点１６から剥離したときの数値をプッシュプルゲージにより測定した値である。このときの端子の接着面積は、４ｍｍ角（１６ｍｍ２）であり、導電性接着材の厚みは０．１～０．３ｍｍとなるように固定した。この評価基準として、接着強度が７９Ｎ以上であることが設定され、実施の形態の給電構造では１６０Ｎであり、評価基準を満足した。
　また、他の態様として、アクリル系樹脂のテープの代わりに、ＥＶＡ樹脂のフィルム（例えば、ブリヂストン社製の商品名：エバセイフ）を用いて、他の仕様は同様とした場合の端子の引張強度は、１８０Ｎであり評価基準を満たした。 Specifically, the terminal 18 having the conductive adhesive 26 cured is pulled in the in-plane direction of the glass plate 20 through a push-pull gauge, and the numerical value when the terminal 18 is peeled off from the feeding point 16 is obtained by the push-pull gauge. It is a measured value. At this time, the bonding area of the terminals was 4 mm square (16 mm 2 ), and the thickness of the conductive adhesive was fixed to 0.1 to 0.3 mm. As this evaluation standard, it was set that the adhesive strength was 79 N or more, and the power feeding structure of the embodiment was 160 N, which satisfied the evaluation standard.
As another aspect, instead of acrylic resin tape, using EVA resin film (for example, Bridgestone's product name: EVA SAFE), other specifications are the same as the tensile strength of the terminal 180N, which satisfies the evaluation criteria.
　また、ウインドシールド１０の給電点近傍の歪みゲージによる測定法での破壊強度が６０ＭＰａ以上であることが好ましい。具体的には、ガラス板２０の端子１８を接着する側（車内側）の端子取り付け部近傍に歪みゲージを貼着したガラス板２０を準備し、歪みゲージを貼着した面を下方に向けて水平に支持する。次に、ガラス板２０の端子取り付け部近傍の鉛直方向にゴム製のハンマーをセットし、所定の高さからガラス板２０の端子１８を接着しない側（車外側）の面の端子取り付け部近傍に向けて自由落下させる。落下後の歪みゲージ値から入力された応力を読み取り、ガラス板２０が割れた強度を破壊強度とする。 Further, it is preferable that the breaking strength measured by a strain gauge near the feeding point of the windshield 10 is 60 MPa or more. Specifically, a glass plate 20 with a strain gauge attached in the vicinity of the terminal attachment portion on the side (vehicle interior) to which the terminal 18 of the glass plate 20 is bonded is prepared, and the surface with the strain gauge attached is directed downward. Support horizontally. Next, a rubber hammer is set in the vertical direction in the vicinity of the terminal mounting portion of the glass plate 20, and near the terminal mounting portion on the surface (vehicle outer side) on the side where the terminals 18 of the glass plate 20 are not bonded from a predetermined height. Let it fall freely. The stress input from the strain gauge value after dropping is read, and the strength at which the glass plate 20 is broken is taken as the breaking strength.
　本発明において給電点の近傍とは、以下の評価方法で測定される範囲を指すものとする。具体的には、ウインドシールド１０の給電構造部の裏側に錘を落下させ、ウインドシールド１０が破損したときの錘の落下高さから破壊強度を評価する。実施の形態のウインドシールド１０の破壊強度は７０ＭＰａであり、評価基準を満足した。 In the present invention, the vicinity of the feeding point refers to a range measured by the following evaluation method. Specifically, the weight is dropped on the back side of the power feeding structure portion of the windshield 10, and the breaking strength is evaluated from the falling height of the weight when the windshield 10 is broken. The breaking strength of the windshield 10 of the embodiment was 70 MPa, which satisfied the evaluation criteria.
　本発明の車両用窓ガラスの給電構造、及び車両用窓ガラスの製造方法は、半田を用いることなく導電体の給電点に端子を良好に接着することができ、導電体の給電点に端子を良好に接着した車両用窓ガラスを提供できるなど、産業上有用である。
　なお、２００８年９月１８日に出願された日本特許出願２００８－２３９２５７号の明細書、特許請求の範囲、図面及び要約書の全内容をここに引用し、本発明の明細書の開示として、取り入れるものである。 The vehicle window glass feeding structure and the vehicle window glass manufacturing method of the present invention can satisfactorily bond the terminal to the power feeding point of the conductor without using solder, and the terminal to the power feeding point of the conductor. The present invention is industrially useful in that it can provide a vehicle window glass that is well bonded.
It should be noted that the entire contents of the specification, claims, drawings and abstract of Japanese Patent Application No. 2008-239257 filed on September 18, 2008 are cited here as disclosure of the specification of the present invention. Incorporated.
　１０…ウインドシールド、１２…遮蔽層、１４…導電体、１６…給電点、１８…端子、２０…車外側のガラス板、２２…車内側のガラス板、２３…切欠部、２４…中間膜、２６…導電性接着剤、２８…粘着テープ、３０…シリコーンシーラント、３２…洗浄部、３４…曲げ成形炉、３６…洗浄部、３８…中間膜挿入部、４０…オートクレーブ装置 DESCRIPTION OF SYMBOLS 10 ... Wind shield, 12 ... Shielding layer, 14 ... Conductor, 16 ... Feeding point, 18 ... Terminal, 20 ... Glass plate outside the vehicle, 22 ... Glass plate inside the vehicle, 23 ... Notch, 24 ... Intermediate film, DESCRIPTION OF SYMBOLS 26 ... Conductive adhesive agent, 28 ... Adhesive tape, 30 ... Silicone sealant, 32 ... Cleaning part, 34 ... Bending molding furnace, 36 ... Cleaning part, 38 ... Intermediate film insertion part, 40 ... Autoclave apparatus

Claims (10)

  1. 　車両用窓ガラスの面上に導電体が形成されるとともに、該導電体の給電点に端子が接続され、該端子を介して電流が前記導電体に供給される車両用窓ガラスの給電構造において、
    　前記端子は、５０～１５０℃に加熱することにより硬化して、導電及び接着機能を発揮する導電性接着剤によって前記給電点に接着されるとともに、接着部材によって車両用窓ガラスに固定(fix)されることを特徴とする車両用窓ガラスの給電構造     In a vehicle window glass feeding structure in which a conductor is formed on a surface of a vehicle window glass, a terminal is connected to a feeding point of the conductor, and current is supplied to the conductor through the terminal. ,
    The terminal is cured by heating to 50 to 150 ° C., and is adhered to the feeding point by a conductive adhesive that exhibits electrical conductivity and an adhesive function, and is fixed to the vehicle window glass by an adhesive member. Feeding structure for vehicle window glass
  2. 　前記導電性接着剤は、室温で液状のエポキシ樹脂と、室温で液状のフェノール樹脂と、反応性希釈剤と、イミダゾール化合物と、導電性金属粒子とを含有する１液無溶剤型導電性接着剤である請求項１に記載の車両用窓ガラスの給電構造。 The conductive adhesive is a one-component solventless conductive adhesive containing an epoxy resin that is liquid at room temperature, a phenol resin that is liquid at room temperature, a reactive diluent, an imidazole compound, and conductive metal particles. The power supply structure for a vehicle window glass according to claim 1.
  3. 　前記端子、及び前記接着部材は、防水加工部材によって前記車両用窓ガラスに封着される請求項１又は２に記載の車両用窓ガラスの給電構造。 3. The vehicle window glass feeding structure according to claim 1 or 2, wherein the terminal and the adhesive member are sealed to the vehicle window glass by a waterproof member.
  4. 　前記端子に給電される電流値が１～３０Ａであり、前記端子と前記給電点との間の電気抵抗値が１００ｍΩ以下である請求項１、２又は３のいずれかに記載の車両用窓ガラスの給電構造。 4. The vehicle window glass according to claim 1, wherein a current value fed to the terminal is 1 to 30 A, and an electric resistance value between the terminal and the feeding point is 100 mΩ or less. Feeding structure.
  5. 　１０Ａの電流を前記端子に３０分間供給した時の該端子の温度が８０℃以下であり、該端子の前記給電点に対する接着強度が７９Ｎ以上である請求項１、２又は３のいずれかに記載の車両用窓ガラスの給電構造。 The temperature of the terminal when a current of 10 A is supplied to the terminal for 30 minutes is 80 ° C or less, and the adhesive strength of the terminal to the feeding point is 79 N or more. Power supply structure for vehicle window glass.
  6. 　前記車両用窓ガラスの給電点近傍の歪みゲージによる測定法での破壊強度が６０ＭＰａ以上である請求項１、２、３、４又は５のいずれかに記載の車両用窓ガラスの給電構造。 The vehicle window glass feeding structure according to any one of claims 1, 2, 3, 4 and 5, wherein a breaking strength measured by a strain gauge near a feeding point of the vehicle window glass is 60 MPa or more.
  7. 　前記接着部材が、アクリル系またはエチレン酢酸ビニル系の熱可塑性樹脂からなる請求項１～６のいずれかに記載の車両用窓ガラスの給電構造。 The vehicle window glass feeding structure according to any one of claims 1 to 6, wherein the adhesive member is made of an acrylic or ethylene vinyl acetate thermoplastic resin.
  8. 　前記車両用窓ガラスが、複数枚の板ガラスに挟持された樹脂製の中間膜からなる合わせガラスである請求項１～７のいずれかに記載の車両用窓ガラスの給電構造。 The vehicle window glass feeding structure according to any one of claims 1 to 7, wherein the vehicle window glass is a laminated glass made of a resin intermediate film sandwiched between a plurality of plate glasses.
  9. 　請求項１～８のいずれかに記載の車両用窓ガラスの給電構造を備えることを特徴とする車両用窓ガラス。 A vehicle window glass comprising the power supply structure for a vehicle window glass according to any one of claims 1 to 8.
  10. 　車両用窓ガラスの面上に導電体を形成する工程と、
    　前記導電体上に形成された給電点及び／または給電点に接着される端子の接触面に導電性接着剤を塗布する工程と、
    　前記端子と前記導電体とを導電性接着剤を介して仮保持する工程と、
    　前記端子を接着部材によって車両用窓ガラスに固定する工程と、
    　前記導電性接着剤を５０～１５０℃の温度で１０分以上加熱する工程と、
    　を備え、加熱によって、導電性接着剤が導電及び接着機能を発揮し、前記導電性接着剤によって接着されるとともに前記接着部材によって、前記端子が車両用窓ガラスに固定されることを特徴とする車両用窓ガラスの製造方法。     Forming a conductor on the surface of the window glass for a vehicle;
    Applying a conductive adhesive to the contact point of the terminal to be bonded to the feeding point and / or the feeding point formed on the conductor; and
    Temporarily holding the terminal and the conductor via a conductive adhesive;
    Fixing the terminal to the vehicle window glass with an adhesive member;
    Heating the conductive adhesive at a temperature of 50 to 150 ° C. for 10 minutes or more;
    The conductive adhesive exhibits conductivity and an adhesive function by heating, and is bonded by the conductive adhesive and the terminal is fixed to the vehicle window glass by the adhesive member. Manufacturing method of vehicle window glass.
PCT/JP2009/066419 2008-09-18 2009-09-18 Electrical connection structure for window glass for vehicles, window glass for vehicles, and method for manufacturing window glass for vehicles WO2010032840A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2010529819A JP5501972B2 (en) 2008-09-18 2009-09-18 Power supply structure for vehicle window glass, vehicle window glass, and method for manufacturing vehicle window glass

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008-239257 2008-09-18
JP2008239257 2008-09-18

Publications (1)

Publication Number Publication Date
WO2010032840A1 true WO2010032840A1 (en) 2010-03-25

Family

ID=42039660

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/066419 WO2010032840A1 (en) 2008-09-18 2009-09-18 Electrical connection structure for window glass for vehicles, window glass for vehicles, and method for manufacturing window glass for vehicles

Country Status (2)

Country Link
JP (1) JP5501972B2 (en)
WO (1) WO2010032840A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015058904A (en) * 2013-09-20 2015-03-30 ダイキョーニシカワ株式会社 Formation method of conductive circuit to vehicular window panel
WO2015128625A1 (en) * 2014-02-25 2015-09-03 Pilkington Group Limited Method of making a window assembly having an electrically heated portion and the window assembly made thereby
CN109362137A (en) * 2018-09-19 2019-02-19 刘良江 A kind of electrically heated glass busbar and its application method
EP3726926A1 (en) * 2019-04-17 2020-10-21 ATT advanced thermal technologies GmbH Heating mat
CN114393979A (en) * 2021-12-28 2022-04-26 福耀玻璃工业集团股份有限公司 Car door window and car

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04283153A (en) * 1990-11-01 1992-10-08 Ppg Ind Inc Vehicle heating window assembly, method for electric connection of said window and electric connector for said window
JPH0899610A (en) * 1994-09-30 1996-04-16 Tsutsunaka Plast Ind Co Ltd Synthetic-resin-made window material having anti-fog performance and manufacture thereof
JPH09157613A (en) * 1995-12-01 1997-06-17 Namitsukusu Kk Conductive adhesive and circuit using the adhesive
JP2002254927A (en) * 2001-02-28 2002-09-11 Central Glass Co Ltd Window glass for vehicle
JP2006264458A (en) * 2005-03-23 2006-10-05 Asahi Glass Co Ltd Fogging proof window system for vehicle
JP2008041343A (en) * 2006-08-03 2008-02-21 Geomatec Co Ltd Heat-generating resin substrate

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04283153A (en) * 1990-11-01 1992-10-08 Ppg Ind Inc Vehicle heating window assembly, method for electric connection of said window and electric connector for said window
JPH0899610A (en) * 1994-09-30 1996-04-16 Tsutsunaka Plast Ind Co Ltd Synthetic-resin-made window material having anti-fog performance and manufacture thereof
JPH09157613A (en) * 1995-12-01 1997-06-17 Namitsukusu Kk Conductive adhesive and circuit using the adhesive
JP2002254927A (en) * 2001-02-28 2002-09-11 Central Glass Co Ltd Window glass for vehicle
JP2006264458A (en) * 2005-03-23 2006-10-05 Asahi Glass Co Ltd Fogging proof window system for vehicle
JP2008041343A (en) * 2006-08-03 2008-02-21 Geomatec Co Ltd Heat-generating resin substrate

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015058904A (en) * 2013-09-20 2015-03-30 ダイキョーニシカワ株式会社 Formation method of conductive circuit to vehicular window panel
WO2015128625A1 (en) * 2014-02-25 2015-09-03 Pilkington Group Limited Method of making a window assembly having an electrically heated portion and the window assembly made thereby
US20170231034A1 (en) * 2014-02-25 2017-08-10 Pilkington Group Limited Method of making a window assembly having an electrically heated portion and the window assembly made thereby
US10960609B2 (en) 2014-02-25 2021-03-30 Pilkington Group Limited Method of making a window assembly having an electrically heated portion and the window assembly made thereby
CN109362137A (en) * 2018-09-19 2019-02-19 刘良江 A kind of electrically heated glass busbar and its application method
EP3726926A1 (en) * 2019-04-17 2020-10-21 ATT advanced thermal technologies GmbH Heating mat
CN114393979A (en) * 2021-12-28 2022-04-26 福耀玻璃工业集团股份有限公司 Car door window and car
CN114393979B (en) * 2021-12-28 2023-11-07 福耀玻璃工业集团股份有限公司 Automobile window and automobile

Also Published As

Publication number Publication date
JPWO2010032840A1 (en) 2012-02-16
JP5501972B2 (en) 2014-05-28

Similar Documents

Publication Publication Date Title
JP5019072B2 (en) Power supply structure for vehicle window glass, vehicle window glass, and method for manufacturing vehicle window glass
TWI449186B (en) A method of connecting an electrical conductor, an electrical conductor connecting member, a connecting structure, and a solar cell module
TWI520159B (en) A conductor connecting member, a connection structure, and a solar cell module
JP5501972B2 (en) Power supply structure for vehicle window glass, vehicle window glass, and method for manufacturing vehicle window glass
EP2200093A1 (en) Member for conductor connection, method for manufacturing the same, connection structure, and solar cell module
CN104877611B (en) Circuit connecting material, connection structure using same, temporary pressure bonding method, and application
JP5681327B2 (en) Curable anisotropic conductive material for electronic parts, connection structure, and method of manufacturing connection structure
KR20150023072A (en) Anisotropic conductive film, bonded body and bonding method
JP5707110B2 (en) Conductive adhesive material, solar cell module and manufacturing method thereof
JP2013152867A (en) Conductive particle, anisotropic conductive material, and connection structure
JP2014084395A (en) Electroconductive adhesive composition, electroconductive adhesive-fitted metal conductor wire, connection body, solar cell module, and method for manufacturing the same
JP2005194306A (en) Conducting adhesive and platy member for window using the same
EP2816612A1 (en) Electrically conductive adhesive agent, solar cell module, and method for producing solar cell module
WO2015170682A1 (en) Curable composition, electroconductive material, and connection structure
JP2020057711A (en) Electromagnetic wave shield sheet and electronic component mounting board
KR20140066195A (en) Solar cell conductive adhesive and connection method using same, solar cell module, and method for producing solar cell module
JP2005194413A (en) Adhesive film for circuit connection and circuit connection structure
JP2012190795A (en) Anisotropic conductive material, connection structure, and manufacturing method of connection structure
EP3994106A1 (en) Glazing having an electrical connector
JP2016178312A (en) Conductive adhesive for solar cell, connection method using the same, solar cell module, and manufacturing method of solar cell module
JP2006040708A (en) Conductive paste composition
JP5768496B2 (en) Insulating layer forming composition, insulating layer forming film and substrate
JP3075633U (en) Glass antenna
JP2014162855A (en) Electrically-conductive adhesive film for connecting solar-cell surface electrode with ribbon wire
JPH09180547A (en) Shield flat cable

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09814684

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2010529819

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 09814684

Country of ref document: EP

Kind code of ref document: A1