JP2009185246A - Method for adhering adherend to glass - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide techniques of adhering an adherend to glass by using a moisture-curable adhesive with high efficiency and a saved space. <P>SOLUTION: After an adherend 10 made of a polyamide resin is stuck to an automobile windshield G through a moisture-curable adhesive B, these components are treated by high-frequency induction heating to promote curing of the moisture-curable adhesive B. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for bonding an adherend to glass.

Conventionally, when mounting each member such as an inner mirror mounting bracket, molding, protector, positioning reference pin, door glass fastening holder, hinge, etc. to automotive glass, epoxy, urethane, silicone, modified silicone Etc. have been used (see, for example, Patent Document 1). Since various vibrations are applied to automobiles, relatively soft adhesives are preferable, and urethane-based and silicone-based materials occupy most of them.
Among them, polyurethane adhesives that are mainly composed of polyurethane and contain plasticizers, fillers, pigments, etc. are used for joint materials, sealing materials, adhesives, and coating materials, etc. Widely used for direct glazing. Polyurethane adhesives used in such applications are moisture-curing adhesives, and there are one-part and two-part types. In either case, the crosslinking reaction proceeds due to moisture in the air and cures.
Moisture curable adhesives have a very slow curing rate in the low humidity state in winter, and several days are required for the crosslinking to be completed, and this tendency is particularly noticeable for one-pack type polyurethane adhesives. As a method of accelerating the curing of such a moisture curable adhesive, there is a method of putting it in a high humidity curing room, but it is necessary for 8 hours or more even in an environment of 30 to 40 ° C. and 55 to 60% RH. It is difficult to improve efficiency.
In recent years, a technology that accelerates the curing of thermosetting adhesives using high-frequency dielectric heating has been developed as a technology that eliminates the curing and drying process after bonding and enables high-efficiency, space-saving manufacturing. (For example, see Patent Documents 2 and 3).
JP-A-11-92735 Japanese translation of PCT publication No. 2003-520726 JP 2003-302139 A

However, in the case of using a moisture curable adhesive, unlike a thermosetting adhesive, only by heating, the curing accelerating action is poor.
Then, the main subject of this invention is providing the technique which adhere | attaches glass and a to-be-adhered body with high efficiency and space-saving, using a moisture hardening type adhesive agent.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
Affixing an adherend made of a polyamide resin to a glass surface via a moisture curable adhesive, and then treating them with high frequency dielectric heating to accelerate the curing of the moisture curable adhesive. A method for adhering an adherend to glass.

(Function and effect)
In addition to simply combining a moisture-curing adhesive and high-frequency dielectric heating, when forming an adherend with a polyamide resin with excellent water absorption, moisture contained in the adherend is vaporized by high-frequency dielectric heating to become water vapor, This water vapor is supplied to the moisture curable adhesive, and curing is greatly accelerated. Therefore, according to the present invention, the glass and the adherend can be bonded with high efficiency and space-saving while using the moisture curable adhesive.

<Invention of Claim 2>
The method for adhering an adherend to glass according to claim 1, wherein the treatment is performed by the high-frequency dielectric heating in a state where the water absorption is in a range of 3.0 to 5.0%.

(Function and effect)
If the water absorption rate of the adherend is too low, moisture supply to the adhesive becomes insufficient, and curing is difficult to promote. On the other hand, if the water absorption rate of the adherend is too high, the moisture is not consumed due to the curing of the adhesive, and is excessive due to the moisture, making it difficult to control heating when performing high frequency dielectric heating, and the adherend is overheated. May dissolve and adhesion may be insufficient. Therefore, the water absorption rate of the adherend is preferably within the range described in this section.

  The “water absorption rate” means that a sample held at 24 ° C. and 60% RH for 120 hours or more first measured the total weight, and then immediately put it into a heating furnace held at 260 ° C. The amount of water (weight) generated in 20 minutes from the start is measured by the Karl Fischer method, and the ratio of the amount of water to the total weight is expressed as a percentage.

<Invention of Claim 3>
The method for adhering an adherend to glass according to claim 2, wherein the polyamide resin of the adherend is 6 nylon.

(Function and effect)
As a material for the adherend of the present invention, 6 nylon is particularly preferable. Nylon 6 is particularly preferred because it is excellent in water absorption, cost, moldability, mechanical properties, abrasion resistance and self-lubricating properties, and has little or no scratching noise.

  As described above, according to the present invention, there are advantages that the glass and the adherend can be bonded with high efficiency and space-saving while using the moisture curable adhesive.

As described above, the present invention is an adhesion method in which an adherend made of a polyamide resin is attached to a glass surface via a moisture curable adhesive, and then these are treated by high-frequency dielectric heating. Hereinafter, it demonstrates in order.
(Moisture curable adhesive)
The moisture curable adhesive used in the present invention is not particularly limited as long as curing is accelerated by moisture, and known adhesives such as acrylic, epoxy, urethane, silicone, and modified silicone can be used. It can be used, and it may be one liquid or two liquids.

  From the track record as an automotive adhesive, a one-component moisture-curing urethane adhesive is particularly preferable. One-part moisture-curing urethane adhesive is a urethane prepolymer having an isocyanate group at the end, and is a compound that is crosslinked and cured to form a polymer while the isocyanate group part forms a urethane bond in the presence of water, It is a reaction product of a polyhydroxyl compound and a polyisocyanate compound. Such a urethane polymer can be produced using, for example, a polyhydroxyl compound and a polyisocyanate compound as main raw materials.

  Examples of the polyhydroxyl compound include various polyether polyols, polyester polyols, and polymer polyols that are generally used in the production of urethane compounds. The polyether polyol is a product obtained by addition polymerization of one or more alkylene oxides such as ethylene oxide, propylene oxide, butylene oxide, and tetrahydrofuran to a compound having two or more active hydrogens. Here, examples of the compound having two or more active hydrogens include polyhydric alcohols, amines, alkanolamines, and polyhydric phenols. Examples of polyhydric alcohols include ethylene glycol, propylene glycol, butanediol, diethylene glycol, glycerin, hexanetriol, trimethylolpropane, pentaerythritol, and the like, and examples of amines include ethylenediamine, hexamethylenediamine, and alkanolamines. Examples thereof include ethanolamine and propanolamine, and examples of the polyhydric phenols include resorcin and bisphenols. Polyester polyol is a polyhydric alcohol and polybasic carboxylic acid condensate, a polyhydric alcohol and hydroxycarboxylic acid condensate, a lactone polymer, and the like. And the compounds exemplified above in the section of polyether polyol. Examples of the polybasic carboxylic acids include adipic acid, glutaric acid, azelaic acid, fumaric acid, maleic acid, phthalic acid, terephthalic acid, dimer acid, and pyromellitic acid. Furthermore, castor oil, a reaction product of castor oil and ethylene glycol, a reaction product of castor oil and propylene glycol, and the like are also effective as a condensate of polyhydric alcohol and hydroxycarboxylic acid. The lactone polymer is a product obtained by ring-opening polymerization of ε-caprolactam, α-methyl-ε-caprolactam, ε-methyl-ε-caprolactam or the like with an appropriate polymerization initiator. The polymer polyol is, for example, one obtained by graft polymerization of an ethylenically unsaturated compound such as acrylonitrile, styrene, or methyl (meth) acrylate on the polyether polyol or polyester polyol, 1,2-polybutanediol, or 1, 4-polybutanediol or a hydrogenated product thereof. These hydroxyl compounds include those mentioned above, and may be used alone or in combination of two or more, but the weight average molecular weight is preferably about 100 to 10,000, more preferably about 500 to 5,000. preferable.

  As a polyisocyanate compound, there are various compounds used in the production of ordinary polyurethane resins. Specifically, 2,4-tolylene diisocyanate or 2,6-tolylene diisocyanate, phenylene diisocyanate, xylene diisocyanate, diphenylmethane-4,4-diisocyanate, naphthylene-1,5-di- Isocyanates and hydrogenated compounds thereof, ethylene diisocyanate, propylene diisocyanate, tetramethylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, 1-methyl-2,4-diisocyanate cyclohexane 1-methyl-2,6-diisocyanatocyclohexane, dicyclohexylmethane diisocyanate, triphenylmethane triisocyanate and the like. These polyisocyanate compounds may be used alone or in combination of two or more.

  The amount ratio of the polyhydroxyl compound and the polyisocyanate compound is blended so that the number of hydroxyl groups in the polyhydroxyl compound is 1 or less, particularly 0.95 to 0.75, per isocyanate group in the polyisocyanate compound. Is preferred. Moreover, the manufacturing conditions of a urethane polymer can employ | adopt the manufacturing conditions of a normal urethane polymer, for example, by making the above-mentioned hydroxyl compound and polyisocyanate compound react at a reaction temperature of about 50-100 degreeC and a normal pressure. Can be manufactured.

In addition to these polyhydroxyl compounds and polyisocyanate compounds, fillers, plasticizers, antioxidants, pigments, silane coupling agents, dispersants, solvents, and the like may be blended. Hereinafter, it demonstrates in order.
Examples of the filler include calcium carbonate and silica. Calcium carbonate is roughly classified into heavy calcium carbonate and precipitated calcium carbonate. Precipitated calcium carbonate is obtained by treating the surface with a fatty acid ester to prevent the reaction between isocyanate groups and moisture and improve storage stability. It is preferable that The fatty acid ester to be subjected to the surface treatment is not limited to fatty acids and esters constituting the same, and for example, stearic acid stearate, stearic acid laurate, palmitic acid stearate, palmitic acid laurate can be used. Also useful are esters obtained from monohydric alcohols. The amount of the fatty acid ester used for the surface treatment is not particularly limited, but is preferably increased or decreased depending on the particle size of the calcium carbonate. Generally, about 1 to 20% of the calcium carbonate weight is used. The amount of precipitated calcium carbonate surface-treated with a fatty acid ester is preferably in the range of 50 to 150 parts by weight with respect to 100 parts by weight of the urethane polymer. Silica has a hydrophilic grade and a hydrophobic grade, but any grade may be used.

  Examples of the plasticizer include dioctyl phthalate (DOP), dibutyl phthalate (DBP), dilauryl phthalate (DLP), dibutyl benzyl phthalate (BBP), dioctyl adipate, diisodecyl adipate, trioctyl phosphate, tris (chloroethyl) phosphate. , Tris (dichloropropyl) phosphate, propylene glycol adipate polyester, butylene glycol adipate polyester, alkyl epoxy stearate, and epoxidized soybean oil. These can be used alone or in combination.

  Antioxidants refer to organic compounds that have the property of preventing or suppressing the action of oxygen under various conditions such as light and heat against various auto-oxidizing substances. For example, radical chain inhibitors can be used. Examples of radical chain inhibitors include phenol derivatives such as butylhydroxytoluene (BHT) and butylhydroxyanisole (BHA), aromatic amines such as diphenylamine and phenylenediamine, and phosphites such as triphenyl phosphite. Can do.

  The pigment includes inorganic pigments and organic pigments, and any of them can be used. Examples of inorganic pigments include metal oxides such as carbon black, titanium oxide, zinc oxide, ultramarine, and bengara, sulfur such as lithopone, lead, cadmium, iron, cobalt, and aluminum, hydrochloride, sulfate, and the like. . Examples of organic pigments include azo pigments and copper phthalocyanine pigments.

The silane coupling agent is generally an organic compound represented by the following formula (1) having a functional group capable of chemically bonding an inorganic material such as glass, silica, metal, clay and the like, which are not compatible with each other, and an organic material such as a polymer. Refers to a silicon compound.
Y to CH ₂ SiX ₃ (1)
Here, X in the formula is a hydrolyzable substituent such as an alkoxy group, an acetoxy group, an isopropoxy group, an amino group, or a halogen, which reacts with an inorganic substance, and Y is a vinyl group or epoxy that easily reacts with an organic substance. Group, amino group, methacryl group, mercapto group and the like.

  The dispersing agent refers to a substance that makes a solid into fine particles and disperses it in a liquid, and sodium hexametaphosphate, condensed sodium naphthalene sulfonate, a surfactant and the like can be used.

  The use of a solvent is optional, but an aromatic hydrocarbon solvent such as xylene or toluene is preferably used.

  Examples of the one-component moisture-curing urethane adhesive described above include Hamatite WS-95 and WS-292 from Yokohama Rubber, Terostat-8899 from Henkel, Essex U-400HV, Essex U-414 from Dow Chemical. It is marketed under the product name. In particular, silane compound-containing hamatite WS-292 and Essex U-414 that are effective for adhesion to glass are preferable.

The application amount of the adhesive of the present invention can be appropriately changed according to the mass or shape of the adherend to be adhered to the glass, but in a normal case, a ratio of 0.01 to 0.1 g / cm ² after bonding. It is preferable to apply so that. The adhesive is preferably applied so as to cover the entire adhesion surface of the adherend.

(Glass)
The present invention is suitable for bonding adherends 1 and 10 to automobile glass G as shown in FIGS. The glass G for automobiles refers to tempered glass for automobiles, black ceramic printed glass, laminated glass using polyvinyl butyral as an intermediate layer, and the like, and is not particularly limited.

  A primer can be applied to the automotive glass G before adhesion using a polyisocyanate composition or a silane coupling agent. As a polyisocyanate compound, there are various compounds used in the production of ordinary polyurethane resins. Specifically, 2,4-tolylene diisocyanate or 2,6-tolylene diisocyanate, phenylene diisocyanate, xylene diisocyanate, diphenylmethane-4,4-diisocyanate, naphthylene-1,5-di- Isocyanates and hydrogenated compounds thereof, ethylene diisocyanate, propylene diisocyanate, tetramethylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, 1-methyl-2,4-diisocyanate cyclohexane 1-methyl-2,6-diisocyanatocyclohexane, dicyclohexylmethane diisocyanate, triphenylmethane triisocyanate and the like. These polyisocyanate compounds may be used alone or in combination of two or more.

The silane coupling agent is generally an organic compound represented by the following formula (1) having a functional group capable of chemically bonding an inorganic material such as glass, silica, metal, clay and the like, which are not compatible with each other, and an organic material such as a polymer. Refers to a silicon compound.
Y to CH ₂ SiX ₃ (1)
Here, X in the formula is a hydrolyzable substituent such as an alkoxy group, an acetoxy group, an isopropoxy group, an amino group, or a halogen, which reacts with an inorganic substance, and Y is a vinyl group or epoxy that easily reacts with an organic substance. Group, amino group, methacryl group, mercapto group and the like.

  In the case where a type containing a silane compound that is effective for adhesion to glass, for example, the above-described hamatite WS-292, Essex U-414, or the like is used as the adhesive, the primer may not be used.

  As the polyisocyanate composition, the isocyanate compound is not particularly limited, and 4,4′-diphenylmethane diisocyanate (MDI), tolylene diisocyanate (TDI), xylene diisocyanate (XDI), hexamethylene diisocyanate (HMDI), hydrogenated ( Hydrogenated) MDI, hydrogenated TDI, hydrogenated XDI, isophorone diisocyanate (IPDI), aromatic aliphatic polyisocyanate, aromatic polyisocyanate, triphenylmethane triisocyanate, tris-p-isocyanate phenylthiophosphate, etc. It is preferable to use a combination of several kinds of the above-mentioned isocyanate compounds rather than using them alone, and use both aromatic and aliphatic isocyanate compounds together. It is desirable to.

The isocyanate-containing primer can be produced by dissolving and diffusing an isocyanate compound in various solvents. In this case, it is preferable to dissolve and diffuse various additives as necessary. As the usable solvent, various known solvents can be used as long as they are inert to the isocyanate compound. For example, ester solvents such as ethyl acetate and butyl acetate, ketones such as methyl ethyl ketone and acetone, and aromatics such as toluene. A group solvent can be used. Among them, ester systems such as ethyl acetate and ketone systems such as methyl ethyl ketone are preferable from the viewpoint of influence on the human body, and ester solvents such as ethyl acetate are particularly preferable.
In addition, it is preferable to add carbon black to the primer composition in order to impart weather resistance.

  The total solid content in the isocyanate-containing primer is preferably 2 to 30% by weight, and is preferably 5 to 20% by weight in consideration of the viscosity and adhesiveness during application.

  Such an isocyanate-containing primer can be applied to an adherend in the same manner as what is called a normal primer, and can be used for adhesion by allowing it to stand for an appropriate time after application. The application method is not particularly limited, and for example, spray application, application with a brush or a brush, or the like can be used.

  The dry film thickness of the adherend when using the isocyanate-containing primer is preferably 1 to 30 μm, and particularly preferably 5 to 15 μm. Even if the membrane pressure is too thin or too thick, the effect as a primer is hardly exhibited.

  Examples of the isocyanate-containing primer described above include those commercially available under the trade name BP5404 from Dow Chemical and those commercially available under the trade names RC-50E and GS-81 from Yokohama Rubber Co., Ltd. However, it is not limited to these.

  Further, the glass G may be degreased prior to bonding in order to remove dust and oil. Degreasing can usually be performed with an organic solvent such as a lower alcohol such as methanol, ethanol or isopropyl alcohol, or a ketone such as acetone or methyl ethyl ketone.

(Adherent)
In the present invention, an adherend made of polyamide resin is used. The polyamide resin is not particularly limited as long as it is a polyamide resin such as 6-nylon or 66-nylon, but 6-nylon is particularly preferable. In order to increase the strength, those containing glass fibers can also be used. As commercial products, trade names of Mitsubishi Engineering Plastics Co., Ltd .: Novamit, Kobatron, Renee, Bavarian Co., Ltd .: Duletan, Ube Industries, Ltd. Trade names: UBE Nylon, Unitika Co., Ltd. Unitika nylon can be exemplified.

  The method for producing the adherend is not particularly limited, and a known method can be used. For example, an adherend (molded product) having a predetermined shape can be manufactured by supplying it to a hopper of a polyamide resin pellet molding apparatus.

  The type of adherend is not particularly limited, but examples of what can be attached to the glass G for automobiles include an inner mirror mounting bracket, a molding, a protector, a positioning clip (spacer) for the front window glass, other window glass (back, Side) positioning reference pins, door glass fastening holders, hinges, and the like.

  FIG. 1 and FIG. 2 show Example 1 of the positioning reference pin. This positioning reference pin 1 is composed of a disc-shaped base portion 2 and a round shaft-shaped pin portion 3 erected coaxially at the center of the upper surface thereof, and the bottom surface of the base portion 2 forms a flat adhesive surface. The bottom surface of the base 2 is bonded to the glass G by the moisture curable adhesive B according to the present invention. 3 and 4 show Example 10 of a positioning clip (spacer) for the front window glass. As shown in FIG. 5, the clip 10 has an elongated substrate portion 11 that is bonded to glass, and a hook-like shape that protrudes indoors from the substrate portion 11 and is latched to a mounting hole 12 of an automobile body. This is a component having a latching protrusion 13, and the substrate portion 11 is bonded to the glass G by the moisture-curing adhesive B according to the present invention. Reference numeral 14 in the figure indicates an adhesive for direct glazing (for example, a one-component moisture-curing urethane adhesive) for fixing the glass G to the body, and reference numeral 15 indicates a dam sea run rubber.

  The adherends 1 and 10 may be degreased prior to bonding, like glass. Degreasing can usually be performed with an organic solvent such as a lower alcohol such as methanol, ethanol or isopropyl alcohol, or a ketone such as acetone or methyl ethyl ketone.

(High frequency dielectric heating)
As the high frequency dielectric heating, a known method can be used without particular limitation as long as moisture contained in the adherends 1 and 10 can be heated and vaporized. The treatment conditions at that time can be appropriately determined according to the glass G to be treated, the moisture curable adhesive B, the materials of the adherends 1 and 10, and the like. The water absorption (as defined above) is preferably 3.0 to 5.0%, particularly preferably 3.5 to 4.5%. When the water absorption rate of the adherends 1 and 10 is too low, moisture supply to the adhesive is insufficient, and curing is difficult to be accelerated. On the other hand, if the water absorption rate of the adherends 1 and 10 is too high, the moisture is not consumed due to the curing of the adhesive, and heating control becomes difficult when performing high-frequency dielectric heating due to this moisture, and due to overheating. There is a possibility that the adherends 1 and 10 are dissolved and the adhesion is insufficient.

(Example)
6-Nylon resin (Mitsubishi Engineering Plastics Co., Ltd., grade name Novamit 1010C) was used, and the clips shown in FIGS. 3 and 4 (adhesive surface dimensions: about 30 mm wide × about 14 mm long) by a known injection molding method. ) Was produced.

  After measuring the water absorption rate of the produced clip using the moisture vaporizer EV-5A and moisture analyzer AQ-2100 (Karl Fischer method, coulometric titration method) manufactured by Hiranuma Sangyo Co., Ltd. as defined above The center part of the substrate part 11 of the clip is coated with about 0.3 g of a one-component moisture-curing urethane adhesive (manufactured by Yokohama Rubber Co., Ltd .: trade name Hamatite WS-292). A sample was prepared by bonding to a test piece (thickness: 3.1 mm, length 100 × width 100 mm).

The sample was heat-treated immediately after bonding using a high-frequency dielectric heating device (Fuji Radio). The processing conditions were as follows: frequency: 40 MHz, output: 1 kW, current value: 120 to 145 mA, processing (high frequency application) time: 30 seconds, pressure stress of the clip against glass: 1 kgf / cm ² . FIG. 6 shows an outline of the high-frequency dielectric heating apparatus, where reference numeral 30 indicates a high-frequency oscillation apparatus, reference numeral 31 indicates an anode, and reference numeral 32 indicates a cathode.

  The sample immediately after the heat treatment was held in an atmosphere of 23 ° C. and 50% RH, and the change in the maximum shear load from the end of the heat treatment until 120 hours passed was measured. When measuring the maximum shear load, a tensile tester (Autograph AGS-10KNG (manufactured by Shimadzu Corporation), etc.) is used to sandwich the fixing jig 20 with the glass G fixed between the lower chuck as shown in FIG. The piano wire 25 was hung around the stop protrusion 13, and this piano wire 25 was pinched by the upper chuck, and the measurement was performed.

  Moreover, the sample after heat processing was observed and it was confirmed whether the clip was melt | dissolved. Further, as a constant load test, a sample held for 120 hours in an atmosphere of 23 ° C. and 50% RH after heat treatment was fixed with a fixing jig 20 so that the glass G was vertical as shown in FIG. As shown in the drawing, an 8 kgf (78.4 N) weight 21 was hung on the hooking protrusion 13 with a thread 22 to confirm the presence or absence of adhesion failure such as adhesion peeling. Further, as a heat cycle test, after heat treatment, a sample held for 120 hours in an atmosphere of 23 ° C. and 50% RH was held for 2 hours in an atmosphere of 90 ° C. and 20% RH, and then −40 ° C., 5% A cycle of holding for 2 hours in an RH atmosphere was performed for 20 cycles, and it was confirmed whether the glass was damaged or peeled off.

(Comparative example)
A sample was prepared in the same manner as in Example 1 except that the high-frequency dielectric heat treatment was omitted, and observation and measurement were performed.

(Observation and measurement results)
FIG. 9 shows the measurement results of the maximum shear load. Table 1 shows other results. As is apparent from the table, the curing rate of the examples according to the present invention was about 4 times that of the comparative examples. Moreover, although 6-nylon resin was used, the clip did not melt and a normal adhesion result was obtained.

  The present invention is particularly suitable for mounting an inner mirror mounting bracket, a positioning clip (spacer) for a front window glass, a positioning reference pin for other window glass, etc. to an automotive glass. It can also be applied to adherends for adherends.

It is a front view which shows the reference pin for positioning. It is a top view which shows the reference pin for positioning. It is a top view which shows the attachment state of the positioning clip of a front window glass. It is a perspective view of the positioning clip of a front window glass. It is sectional drawing which shows the attachment state of the positioning clip of a front window glass. It is the schematic of a high frequency dielectric heating process. It is a side view which shows the measuring point of a maximum shear load. It is a side view which shows a constant load load test. It is a graph which shows the measurement result of a maximum shear load.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Reference pin for positioning, 10 ... Positioning clip (spacer) of front window glass, 20 ... Fixing jig, 21 ... Weight, 22 ... Thread, G ... Front window glass for motor vehicles, B ... Thermosetting double-sided adhesive tape.

Claims (3)

  Affixing an adherend made of a polyamide resin to a glass surface via a moisture curable adhesive, and then treating them with high frequency dielectric heating to accelerate the curing of the moisture curable adhesive. A method for adhering an adherend to glass.   The method for adhering an adherend to glass according to claim 1, wherein the treatment is performed by the high-frequency dielectric heating in a state where the water absorption is in a range of 3.0 to 5.0%.   The method for adhering an adherend to glass according to claim 2, wherein the polyamide resin of the adherend is 6 nylon.

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