Manufacturing method for vehicle window glass with components

Abstract

To provide a technique for enabling temporary fixing of a component to be performed more easily in a manufacturing method of vehicle window glass with a component.SOLUTION: A manufacturing method of vehicle window glass with a component which is formed by a vehicle glass plate and a component being adhered through an adhesive includes, in a written order, an application step in which the adhesive is applied to the component; a first heating step in which at least part of the adhesive applied is heated; and an attachment step in which the component and the vehicle window glass are attached through the adhesive.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a window glass for a vehicle with components.

Background Art

[0002] A configuration in which components such as a mirror base and brackets are adhered to a window glass for a vehicle with an adhesive is known. In the manufacture of such a window glass for a vehicle with components, after applying an adhesive to the adhesive surface of the component and attaching it to the window glass for a vehicle, the adhesive is cured to adhere the component to the window glass for a vehicle.

[0003] Many of the adhesives commonly used for the above adhesion require time to cure. Therefore, in many cases, temporary fixing (or temporary fastening) of the component is performed so that the relative position between the component and the window glass for a vehicle does not shift even when a load such as vibration is applied after the component is attached to the window glass for a vehicle. As a means of temporary fixing, double-sided tape is well known, but the use of an additional adhesive of a different type from the original adhesive and having a short curing time has also been considered (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, as mentioned above, using double-sided tape or other types of adhesives requires a large number of materials and a separate process from the application of the adhesive originally used, resulting in increased costs and effort. In particular, when using adhesives with a short curing time, such as hot melt adhesives as described in Patent Document 1, equipment is required to heat and fluidize the adhesive material for injection, which incurs additional costs for such equipment and can complicate the manufacturing process.

[0006] In view of the above, one aspect of the present invention aims to provide a technology for manufacturing a vehicle window glass with attached parts that allows for simpler temporary fastening of the parts. [Means for solving the problem]

[0007] To solve the above problems, one aspect of the present invention is a method for manufacturing a vehicle window glass with a component, wherein a vehicle glass plate and a component are bonded together via an adhesive, comprising, in this order, a coating step of applying an adhesive to the component, a first heating step of heating at least a portion of the applied adhesive, and a mounting step of attaching the component and the vehicle window glass via the adhesive. [Effects of the Invention]

[0008] According to one aspect of the present invention, a technique is provided for manufacturing a vehicle window glass with attached parts, which allows for simpler temporary fastening of the parts. [Brief explanation of the drawing]

[0009] [Figure 1] This figure shows an example of a vehicle window glass with components manufactured by one embodiment of the present invention. [Figure 2] This is an enlarged view of the cross-section of line II in Figure 1. [Figure 3] This is a flowchart illustrating an example of a manufacturing method according to one embodiment of the present invention. [Figure 4] This figure shows one step in the manufacturing process of a vehicle window glass with components according to one embodiment of the present invention. [Figure 5] This is an enlarged view of the section along line II-II in Figure 4. [Figure 6] This figure shows one step in the manufacturing process of a vehicle window glass with components according to one embodiment of the present invention. [Figure 7] This figure shows one step in the manufacturing process of a vehicle window glass with components according to one embodiment of the present invention. [Figure 8] This is an enlarged view of the section along line III-III in Figure 7. [Modes for carrying out the invention]

[0010] Embodiments of the present invention will be described below with reference to the drawings. In each drawing, the same or corresponding components are denoted by the same reference numerals, and their descriptions may be omitted.

[0011] Figure 1 shows an example of a vehicle window glass 1 with a component manufactured according to this embodiment, viewed from the interior side of the vehicle. Figure 2 shows a partially enlarged view of the cross-section of line II in Figure 1. As shown in Figures 1 and 2, component 30 is bonded to the main surface of the vehicle window glass 10, and adhesive 20 is used for bonding. In the illustrated example, component 30 is a resin bracket, and this resin bracket is bonded to the upper part of the interior surface of the vehicle window glass 10, near the center in the left-right direction (Figure 1). In addition, although the vehicle window glass 10 in Figure 1 is a windshield, the vehicle window glass in this embodiment may be a rear window, side window, roof window, etc.

[0012] As shown in Figures 1 and 2, a shielding layer 50 is formed on the peripheral edge of the vehicle window glass 10. The shielding layer 50 is also called the black ceramic layer. The composition of the shielding layer 50 is not particularly limited, but it is preferably a layer formed by applying and firing a black, gray, or dark brown colored ceramic paste (glass paste). The shielding layer 50 serves to protect the sealant, etc., used to attach and hold the vehicle window glass to the vehicle body from ultraviolet rays and the like. In the example in Figures 1 and 2, the part 30 is in contact with the shielding layer 50 via adhesive 20 and is bonded to the vehicle window glass 10.

[0013] The vehicle window glass 10 used in this embodiment may be made of glass sheets such as soda-lime silicate glass, aluminosilicate glass, borate glass, lithium aluminosilicate glass, or borosilicate glass. The method of forming the glass sheet is not particularly limited, but glass formed by the float method is preferred, for example. The glass sheet may be untempered, or it may be tempered glass that has been air-cooled or chemically strengthened. Untempered glass is made by forming molten glass into a sheet and slowly cooling it. Tempered glass is made by forming a compressive stress layer on the surface of untempered glass. If the tempered glass is air-cooled tempered glass, the glass sheet may be heated and rapidly cooled from a temperature near its softening point, thereby creating compressive stress on the glass surface due to the temperature difference between the glass surface and the inside of the glass, thereby strengthening the glass surface. On the other hand, if the tempered glass is chemically strengthened glass, the glass surface may be strengthened by creating compressive stress on the glass surface by an ion exchange method or the like. Furthermore, while the vehicle window glass is preferably transparent, it may be colored to an extent that does not impair transparency. The shape of the glass is not limited to a rectangular shape, and it may be processed into various shapes. Furthermore, glass sheets used for vehicle windows may be bent and curved. Bending methods include gravity forming or press forming.

[0014] The vehicle window glass 1 may be single-pane glass or laminated glass (Figure 2). Laminated glass is made by bonding multiple glass plates 11 and 12 together with an interlayer 15 in between. The multiple glass plates used in laminated glass are also made of the same type of glass as described above.

[0015] In the case of laminated glass, the material of the intermediate film 15 (Fig. 2) disposed between the plurality of glass plates 11 and 12 is not particularly limited, but is preferably a thermoplastic resin. Specific examples of the material of the intermediate film include conventionally used thermoplastic resins such as plasticized polyvinyl acetal resins, plasticized polyvinyl chloride resins, saturated polyester resins, plasticized saturated polyester resins, polyurethane resins, plasticized polyurethane resins, ethylene-vinyl acetate copolymer resins, ethylene-ethyl acrylate copolymer resins, cycloolefin polymer resins, ionomer resins, etc. Further, a resin composition containing a modified block copolymer hydride described in Japanese Patent No. 6065221 can also be preferably used. Among these, a plasticized polyvinyl acetal resin is preferably used because it is excellent in the balance of various properties such as transparency, weather resistance, strength, adhesion, puncture resistance, impact energy absorption, moisture resistance, heat insulation, and sound insulation. The above thermoplastic resins may be used alone or in combination of two or more. The "plasticized" in the above plasticized polyvinyl acetal resin means that it is plasticized by the addition of a plasticizer. The same applies to other plasticized resins.

[0016] The intermediate film 15 may be a resin that does not contain a plasticizer, such as an ethylene-vinyl acetate copolymer resin. Examples of the polyvinyl acetal resin include polyvinyl formal resin obtained by reacting polyvinyl alcohol (PVA) with formaldehyde, polyvinyl acetal resin in a narrow sense obtained by reacting PVA with acetaldehyde, polyvinyl butyral resin (PVB) obtained by reacting PVA with n-butyl aldehyde, etc. In particular, PVB is mentioned as a suitable material because it is excellent in the balance of various properties such as transparency, weather resistance, strength, adhesion, puncture resistance, impact energy absorption, moisture resistance, heat insulation, and sound insulation. The above resins may be used alone or in combination of two or more.

[0017] In the case of laminated glass, the thickness of the entire vehicle window glass (including the thickness of the interlayer film) may be 2.3 mm or more and 8.0 mm or less. Also, the thickness of each of the plurality of glass plates constituting the laminated glass may be 0.5 mm or more and 3.5 mm or less. The thicknesses of the plurality of glass plates may be the same as each other or different. Further, the thickness of the glass plate on the vehicle interior side may be 0.5 mm or more and 2.3 mm or less.

[0018] On the other hand, the component 30 is not particularly limited as long as it is a component attached to any location on the main surface of the vehicle window glass 10. The component 30 may be a mirror base for attaching an inner mirror, a bracket for attaching a sensor, a camera, etc., a molding, a protector, a pin, a clip, a holder, a hinge, or the like.

[0019] The material of the component 30 is also not particularly limited and may be made of resin, metal, a combination of metal and resin, or other materials. When resin is used as the material of the component 30, the resin may be a thermosetting resin or a thermoplastic resin. Examples of the resin include polyesters such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), polyolefins such as polyethylene (PE) and polypropylene (PP), polycarbonate (PC), polyamides (PA) such as nylon 6 and nylon 6,6, high heat-resistant polyamides (PA6T, PA6I, PA6T / 6I, etc.) based on terephthalic acid and isophthalic acid, polyimide (PI), polyetherimide (PEI), acrylonitrile-butadiene-styrene (ABS), polyacetal (POM), polyvinyl chloride (PVC), epoxy (EP), and the like. When metal is used as the material of the component 30, it may be a simple metal composed of one kind of metal element or an alloy, and for example, it may be aluminum, zinc, iron, stainless steel, or the like.

[0020] The adhesive 20 used in this embodiment is not particularly limited as long as it is an adhesive that can be used to bond the window glass 10 and the part 30, and may be epoxy, urethane, silicone, modified silicone, melamine, phenol, acrylic, etc. It may also be a one-component or two-component adhesive. Preferably, the adhesive is a heat-activated adhesive (thermosetting adhesive), that is, a heat-triggered type (where curing is accelerated by heating such as thermal cations or thermal radicals), or it contains a thermosetting polymer as its main component. A thermosetting adhesive is preferable because the manufacturer can control the timing of curing. The thermosetting adhesive may be a heat-curing type (one that requires heating in its normal usage form) or a room-temperature curing type (one that cures by being left to stand in its normal usage form and does not require heating), but a room-temperature curing adhesive can be suitably used in the method according to this embodiment. Specific examples of adhesives include two-component modified silicone adhesives (modified silicone / epoxy adhesives), two-component urethane adhesives, one-component thermosetting urethane adhesives, and second-generation acrylic adhesives (SGA).

[0021] Figure 3 shows a flowchart of a manufacturing method for a vehicle window glass 1 with a component according to one embodiment. As shown in Figure 3, the manufacturing method according to this embodiment includes, in this order, a coating step (S11) in which an adhesive is applied to the component, a first heating step (S12) in which at least a portion of the applied adhesive is heated, and a mounting step (S13) in which the component and the vehicle window glass are attached. By performing the mounting step (S13) after the first heating step (S12), the component can be temporarily fixed to the vehicle window glass. Furthermore, the manufacturing method may include a second heating step (S14) in which the adhesive is heated and cured, and a cooling step (S15). The second heating step (S14) in which the adhesive is heated and cured causes the component and the vehicle window glass to be bonded and fixed via the adhesive, thereby obtaining the desired product, a vehicle window glass with a component. The bonding by the second heating step (S14) may be called main bonding (or final bonding).

[0022] As described above, in this embodiment, adhesive is applied to the part, and after heating at least a portion of the applied adhesive (referred to as the first adhesive portion or the first portion), the part is attached to the vehicle window glass. This accelerates the hardening of the heated first adhesive portion to some extent, allowing it to exhibit sufficient adhesive function to prevent relative misalignment between the part and the window glass, and thus the first adhesive portion can be used for temporary fixing of the part to the vehicle window glass. Therefore, there is no need to use a separate component such as double-sided tape, i.e., a component whose method of use differs from that of adhesive. Furthermore, according to this embodiment, for example, a portion of the adhesive originally used for main bonding can be used as the adhesive portion for temporary fixing, in which case the adhesive can be unified for main bonding and temporary fixing, and there is no need to prepare a separate adhesive for temporary fixing. Thus, in this embodiment, temporary fixing can be performed in a simple process without increasing the number of required materials or increasing the manufacturing effort due to differences in the method of use.

[0023] While other adhesives with short curing times, particularly hot-melt adhesives, have been considered for temporary fixing, hot-melt adhesives require equipment to heat the adhesive material to 80°C or higher to fluidize it before injection, thus increasing manufacturing facilities and potentially complicating the manufacturing process. This complexity is avoided by the manufacturing method according to this embodiment. Furthermore, hot-melt adhesives have the characteristic of curing as the temperature decreases, so regardless of the user's intention, curing begins immediately after injection. This means that curing may have progressed to some extent by the time the parts are attached, potentially preventing sufficient open time (time from application to attachment). In contrast, the manufacturing method according to this embodiment allows for sufficient open time, and furthermore, the open time can be adjusted by adjusting conditions such as the timing of heating (first heating step S12), heating temperature, and heating time, resulting in high workability (process applicability). For example, according to this embodiment, the open time can be adjusted to 1 second or more and 90 seconds or less, preferably more than 10 seconds and 90 seconds or less.

[0024] The following will provide a more detailed explanation of each step in the manufacturing method according to this embodiment, referring to Figures 4 through 8 as well as Figure 3.

[0025] First, in the coating step (S11), adhesive 20 is applied to the bonding surface of the part 30. The bonding surface of the part 30 is the surface that faces the main surface of the vehicle window glass 10 and can be aligned with the main surface, that is, the surface that comes into contact with the main surface of the vehicle window glass 10 in the installation step (S13). The bonding surface may be flat or have a curve that matches the curve of the opposing surface of the vehicle window glass 10. The adhesive 20 can be applied by conventionally known means depending on the type of adhesive. In the coating step (S11), the temperature of the adhesive 20 is less than 80°C, preferably 50°C or lower. Figure 4 shows the part 30 with adhesive 20 applied to the bonding surface 31. As shown in Figure 4, the adhesive 20 may be applied to the entire bonding surface 31, but by applying it to only a part of the bonding surface 31, it is possible to prevent the adhesive 20 from overflowing when the window glass 10 is installed and to reduce costs. Figure 4 illustrates a linear adhesive 20 with a nearly constant width in plan view, applied to multiple discontinuous locations. However, the location where the adhesive 20 is applied is determined by the configuration of the component 30, i.e., its size, shape, material type, and function (for example, what it holds if it is a bracket). When the adhesive 20 is applied linearly, the width of the line may be between 1 mm and 4 mm.

[0026] After the coating step (S11), at least a portion of the adhesive 20 is heated using the heating means 80 in the first heating step (S12). In this specification, the portion of the adhesive 20 heated in the first heating step (S12) (temporary fixing adhesive portion) is designated as the first portion 21, and the portion not heated in the first heating step (S12) but heated during the main bonding (second heating step S14) (main bonding adhesive portion) is designated as the second portion 22. Which portion of the coated adhesive 20 is designated as the first portion 21 or the second portion 22 can be appropriately determined depending on the configuration of the part 30. Furthermore, by applying the adhesive perpendicular to the process load for temporary fixing, the strength for temporary holding (temporary fixing) can be more efficiently achieved. For example, as shown in Figure 4, it is preferable to heat the portion of the adhesive applied to the longitudinal end of the part as the first portion 21 in the first heating step (S12). In the example shown in Figure 4, the adhesive 20 is applied in three separate locations, one of which is designated as the first section 21.

[0027] The amount of the first portion 21 may be 10% to 60% by volume of the total amount of adhesive 20 applied to the bonding surface 31. Furthermore, the first portion 21 may be a portion that occupies 10% to 60% of the total area of ​​the bonding surface 31 of the part 30 in a plan view. By setting the application area of ​​the first portion 21 to the above range, the adhesive of the first portion 21 can perform a sufficient temporary fixing function, while ensuring that the second portion 22, which will be cured in the main bonding (second heating step S14), is secured, and preventing the first heating step (S12) from becoming complicated or excessively long.

[0028] The heating means in the first heating step (S12) is not particularly limited, but a means that irradiates electromagnetic waves of a predetermined wavelength is preferable because it enables non-contact heating, thus allowing heating without causing deformation of the adhesive 20. For example, a heating means that heats by irradiating near-infrared to short-wavelength infrared rays (wavelength 780 nm to 2500 nm), such as a halogen lamp heater (halogen wide heater, halogen point heater, halogen line heater, etc.), is preferable.

[0029] If a heater is used in the first heating step (S12), its output may be between 200W and 800W. Also, the distance (or focal length) from the heater opening to the adhesive surface may be between 20mm and 60mm.

[0030] The heating conditions in the first heating step (S12) may be the same as those in the main bonding step (second heating step S14, described later), but it is preferable to use higher temperature conditions than those in the main bonding step (second heating step S14), for example, conditions that result in a higher rate of temperature rise per unit mass. This shortens the time of the temporary fixing step (first heating step S12) and prevents the interlayer in the laminated glass from deforming during the main bonding step (second heating step S14), even when laminated glass is used as the glass.

[0031] In the first heating step (S12), heating can be performed so that the temporary adhesive portion reaches a target temperature (target curing temperature for temporary fixing) that allows the part to be temporarily fixed to the glass. The target curing temperature for temporary fixing is a desired temperature that the adhesive should reach in the first heating step (S12), and is determined by the type of part, material, configuration of the vehicle window glass, amount of temporary adhesive portion, and desired degree of curing. The target curing temperature for temporary fixing can be determined, for example, by measuring the gelation time of the adhesive at multiple temperatures and selecting the highest gelation temperature within a temperature range that does not damage the part or the adhesive. The target curing temperature of the adhesive is higher than room temperature (15-25°C), and may be, for example, 50°C to 150°C. Since the first heating step (S12) is performed on the adhesive applied to the part before bonding it to the glass, the target curing temperature for temporary fixing can be higher than the target curing temperature in the main bonding step (second heating step S14) described later.

[0032] In this embodiment, heating methods such as induction heating, lasers, and hot air can be used, but heating without wind is preferred. In this specification, "without wind" means that no means are provided to generate a flow of air or other gas (including water vapor) that strikes the object to be heated. By using a windless heating method, the possibility of deformation of the adhesive can be reduced or eliminated, thereby improving the temporary fixing strength of the first portion 21 of the adhesive 20 and reducing the possibility of damage to the part 30.

[0033] In the example shown in Figure 4, a halogen heater device is shown as the heating means 80. This halogen heater device may include a heater body 81 and a power supply / control unit 85. Figure 5 shows a cross-sectional view taken along line II-II in Figure 4. As shown in Figure 5, the heating means 80 can be positioned above the first part 21, and the focus of the heater can be positioned within the area where the first part 21 is located.

[0034] As shown in Figures 4 and 5, the part 30 to which the adhesive 20 has been applied may be placed on the base 70 with the adhesive surface 31 facing upwards and fixed in place. In this case, the base 70 may be attached to a jack or the like and be adjustable in the vertical direction. Alternatively, the base 70 may be attached to a robot arm or the like and be movable in three dimensions.

[0035] After the first heating step (S12) has finished heating the first portion 21 of the adhesive 20, in the mounting step (S13), the part 30 with the adhesive 20 applied to the bonding surface 31 is placed on the vehicle window glass 10. Figure 6 shows the state midway through the mounting step (S13), and Figure 7 shows the state in which the part 30 is placed on the main surface of the vehicle window glass 10. In the examples shown in Figures 6 and 7, the part 30 is placed on the shielding layer 50 of the vehicle window glass 10, but the part 30 may be attached directly to the glass plate instead of on the shielding layer 50.

[0036] Following the installation process (S13), the second heating process (S14), which is the main bonding process, is performed. In the second heating process (S14), the second portion 22 of the adhesive 20 that was not heated in the first heating process (S12), or the entire adhesive 20 including the first portion 21 and the second portion 22, is heated, causing the adhesive 20 to harden and bonding the part 30 to the vehicle window glass 10, thereby forming the vehicle window glass 1 with the part attached (Figure 1).

[0037] The heating means in the second heating step (S14) can be the same as the heating means 80 in the first heating step (S12). That is, a heating means that heats by irradiating with near-infrared to short-wavelength infrared light (wavelength 780 nm to 2500 nm), such as a halogen lamp heater (halogen wide heater, halogen point heater, halogen line heater, etc.), is preferred. In this way, in the manufacturing method according to this embodiment, the same heating means can be used in the first heating step (S12) and the second heating step (S14), so the equipment can be configured compactly.

[0038] In the second heating step (S14), particularly when the component 30 is made of resin, it is preferable to locally heat the heat-absorbing layer or its vicinity provided on the main surface (the surface facing the component 30) of the vehicle window glass 10. The heat-absorbing layer is a layer made of a material that can absorb heat, transmit the absorbed heat, or absorb energy supplied from the outside (for example, light energy such as heat rays), and convert the absorbed energy into heat to obtain heat. The shielding layer 50 (Figure 1, etc.) formed on the periphery of the vehicle window glass 10 described above is a heat-absorbing layer. Furthermore, in this specification, locally heating a predetermined part means raising the temperature of the predetermined part locally, rather than heating the entire structure combined with the predetermined part. For example, when the temperature of the predetermined part and other parts or components are measured in conjunction with the heating of the predetermined part, it means that the temperature of the predetermined part rises first, or that the rate of heating of the predetermined part is fast.

[0039] The heat-absorbing layer may be, for example, a layer containing a metal component, a so-called low-emission film (Low-E film), or a conductive layer formed by applying and firing a conductive paste containing metal particles such as silver. The metal used in such a heat-absorbing layer may be silver, tin, zinc, titanium oxide, etc. The thickness of the heat-absorbing layer 50 is not particularly limited and should be any thickness that has heat-absorbing properties and can transfer the heat obtained to the adhesive.

[0040] By locally heating the heat-absorbing layer, the adhesive can be heated in a shorter time compared to methods that involve housing the entire structure in an enclosure and heating the entire structure. Therefore, the time required to raise the adhesive temperature to the target temperature can be shortened, which in turn can improve the manufacturing efficiency of vehicle window glass with attached components. In addition, since the heating of parts other than the adhesive is suppressed, it is possible to prevent heat damage to those parts.

[0041] In the second heating step (S14), when locally heating the shielding layer 50, which is a heat-absorbing layer, the heater body 81 of the heating means 80 can be positioned above the shielding layer 50, as shown in Figure 8. Figure 8 is a cross-sectional view taken along line III-III of Figure 7. The output of the heating means in the second heating step (S14) may be 150W or more and 400W or less. The distance (or focal length) from the opening of the heater to the surface of the heat-absorbing layer (shielding layer 50 in the example of Figure 8) may be 12mm or more and 30mm or less. By making the output of the heating means in the second heating step (S14) and / or the focal length in the second heating step (S14) smaller than the conditions in the first heating step (S12), it is possible to prevent the interlayer in the laminated glass from deforming in the second heating step (S14), even when laminated glass is used as a vehicle window glass.

[0042] As described above, when the vehicle window glass 10 is laminated glass, the second heating step (S14) can be performed in such a way that no deformation (foaming, discoloration, deformation, etc.) occurs in the interlayer contained in the laminated glass. For example, in this embodiment, heating can be performed so that the temperature of the interlayer is 100°C or less, preferably 80°C or less, and more preferably 50°C or less. By locally heating the heat absorption layer, it is possible to rapidly raise the temperature of the adhesive while suppressing excessive heating of the interlayer. Therefore, it becomes possible to bond parts in a short time without damaging the laminated glass.

[0043] In the second heating step (S14), heating can be performed so that the temperature of the adhesive reaches the target temperature for curing the adhesive (target curing temperature). Here, the target curing temperature can be determined by the type of adhesive, the type and material of the parts, the composition of the vehicle window glass, the desired degree of curing of the adhesive, etc., similar to the target curing temperature for temporary fixing described above. The target curing temperature can be determined, for example, by measuring the gelation time of the adhesive at multiple temperatures and selecting the highest gelation temperature within a temperature range that does not damage the adhesive, parts, and interlayer in the glass. The target curing temperature of the adhesive is higher than room temperature (15-25°C), and may be, for example, between 40°C and 100°C.

[0044] A cooling step (S15) may be provided after the second heating step (S14). [Examples]

[0045] The embodiments of the present invention will be described in more detail below based on the examples. In these examples, automotive window glass with attached parts, in which the parts are bonded to the main surface of the window glass with an adhesive, was manufactured and evaluated under various conditions. Of the following examples, Examples 1 to 6 and Example 10 are examples, and Examples 7 to 9 are comparative examples.

[0046] (Example 1) =Application= Polyamide (PA) sensor bracket (total length 70mm, width 50mm, adhesive surface area approximately 2000mm) 2A hexagonal shape with a roughly circular opening was prepared, and a total of 3.6g of two-component modified silicone / epoxy adhesive (Konishi Corporation's "MOS400") was applied to its bonding surface. The bonding surface of the sensor bracket (part) is the flat surface facing the main surface of the window glass. The adhesive was divided into three sections, and 1.0g was applied linearly to each section over a length of 50mm. Of these, one section was designated as the main bonding adhesive section (Part 1), and the other sections were designated as temporary fixing adhesive sections (Part 2).

[0047] =1st heating= Next, the temporary adhesive portion (first portion) of the adhesive applied to the bonding surface of the bracket was heated using a short-wavelength infrared heater (halogen lamp heater, "Wide Heater II WH-1000" manufactured by Shin-Yu Shoji Co., Ltd.). More specifically, the heater was positioned so that the distance from the opening of the heater to the adhesive surface was approximately 30 mm (the focal length was approximately 10 mm). The temporary adhesive portion was then heated at an output of 700 W until the temperature reached the target curing temperature for temporary fixing (described later).

[0048] =Installation= A sample of laminated glass (100mm x 100mm) was prepared by bonding two 2mm thick glass plates together with a polyvinyl butyral interlayer (0.73mm) in between. A shielding layer made of fired ceramic paste was formed on one side of the laminated glass sample. As described above, the adhesive surface of the bracket, after the temporary fixing adhesive portion had been heated, was attached to the laminated glass in the area where the shielding layer was present. The thickness of the adhesive sandwiched between the bracket and the laminated glass was approximately 1mm. This temporarily fixed the bracket to the laminated glass.

[0049] =Second heating= The heater was then positioned facing the shielding layer of the laminated glass, with the focal point located approximately 5 mm away from the bracket in the direction of the laminated glass, and the distance from the heater's opening to the surface of the shielding layer was approximately 5 mm (the focal length being approximately 5 mm). The heater was heated at 300 W until at least the temperature of the main adhesive portion reached the target curing temperature (main adhesive curing target temperature, described later). This permanently fixed the bracket to the laminated glass.

[0050] (Example 2) Aside from replacing the bracket with one made of polybutylene terephthalate (PBT), the procedure was the same as in Example 1 (the size and shape of the bracket were also the same as in Example 1). Adhesive was applied to the bracket, the adhesive portion for temporary fixing was heated (first heating), then it was attached to the laminated glass, and the shielding layer of the laminated glass was further heated locally (second heating).

[0051] (Example 3) Aside from replacing the bracket with one made of polycarbonate (PC), the procedure was the same as in Example 1 (the size and shape of the bracket were also the same as in Example 1). Adhesive was applied to the bracket, the adhesive portion for temporary fixing was heated (first heating), then it was attached to the laminated glass, and the shielding layer of the laminated glass was further heated locally (second heating).

[0052] (Example 4) A sensor bracket made primarily of iron, but with a cationic electrodeposition coating on the surface (length 74mm, width 3.8mm, adhesive surface area 320mm) 2 A two-component modified silicone / epoxy adhesive, similar to that used in Example 1, was applied to the entire bonding surface of the sensor bracket, and it was placed on the laminated glass, as in Example 1. The adhesive thickness was set to 1.2 mm. The adhesive was applied to the bracket, the temporary adhesive portion (the adhesive portion applied to the frame portion extending in the longitudinal direction) was heated (first heating), then it was attached to the laminated glass, and the shielding layer of the laminated glass was further heated locally (second heating).

[0053] (Example 5) The experiment was conducted in the same manner as in Example 1, except that the entire adhesive was replaced with a two-part urethane adhesive (WS222 / B1 manufactured by Sikahamatite Co., Ltd.).

[0054] (Example 6) The experiment was conducted in the same manner as in Example 1, except that the entire adhesive was replaced with a one-component thermosetting urethane adhesive (Sunstar's "Penguin Cement #8800"), and a primer (Sunstar's "SC-241") was applied to the glass bonding surface before applying the adhesive.

[0055] (Example 7) The main adhesive used was the two-component modified silicone / epoxy adhesive used in Example 1, but double-sided tape was used as a temporary fixing method instead of adhesive. The experiment was conducted in the same manner as in Example 1 in all other respects.

[0056] (Example 8) The main adhesive portion was the two-component modified silicone / epoxy adhesive used in Example 1, but a hot-melt adhesive (Toagosei Co., Ltd. "AS920") was used for the temporary fixing adhesive portion. The experiment was conducted in the same manner as in Example 1 in all other respects. The hot-melt adhesive was injected after loading the hot-melt material into the injection mold and bringing it to a high-temperature, fluid state.

[0057] (Example 9) Similar to Example 1, a two-component modified silicone / epoxy adhesive was used. However, after applying the adhesive to the bonding surface of the bracket, the temporary adhesive portion was not heated (first heating). Instead, the bonding surface of the bracket was attached to the shielding layer of the laminated glass, and the shielding layer was heated locally (second heating).

[0058] (Example 10) The experiment was conducted in the same manner as in Example 1, except that a hot air heater (Fintech's "SAHD-15S") was used instead of a short-wavelength infrared heater as the heating method.

[0059] Each example was evaluated from the perspectives of process applicability and quality. The conditions and evaluation results for each example are shown in Table 1.

[0060] <Evaluation of process applicability> (Heating time) The time from the start of heating the temporary adhesive until the temporary adhesive portion reached the target curing temperature was recorded. The evaluation criteria were as follows: 〇: 60 seconds or less ×: More than 60 seconds The "target curing temperature for temporary fixing" was set as follows: The "target curing temperature for temporary fixing" is the desired temperature that the temporary fixing adhesive portion should reach during the heating process for temporary fixing (first heating process). For each adhesive used, the gelation time at multiple temperatures was measured, and the highest gelation temperature within a temperature range that does not damage the adhesive or the adherend (part) was set as the target curing temperature for temporary fixing. Since the first heating process is before bonding, there is little concern about thermal damage to the glass, and a relatively high target curing temperature can be set. The gelation time was measured using a method compliant with Gelation Time Method A in JIS K 6910:2007. Table 1 also lists the target curing temperatures for temporary fixing for each example.

[0061] (Opening hours) Open time, in each example, is the time from when the adhesive is applied to the bracket and it is ready to be bonded, until the adhesive surface of the bracket is brought into contact with the surface of the shielding layer of the laminated glass. In this disclosure, it refers to the time from the end of the first heating step (S12) until the adhesive surface of the bracket is brought into contact with the surface of the shielding layer of the laminated glass. In this evaluation, we determined whether the open time could be 90 seconds or more, that is, whether the temporary adhesive portion could function as an adhesive if an open time of up to 90 seconds was taken. The evaluation criteria were as follows: ○: A maximum open time of 90 seconds was possible. ×: It was not possible to take an open time of up to 90 seconds.

[0062] (Strength immediately after installation) After attaching the components to the glass plate with temporary adhesive, the shear strength was measured immediately. For shear strength measurement, a tensile testing machine (IMADA ZTS-500N) was attached near the opening of the bracket, and a tensile force of 50 mm / min was applied. The strength value recorded at the point of fracture was recorded. The evaluation criteria were as follows: ○: Breaking strength value of 30N or higher △: 15 to less than 30N ×: The fracture strength was less than 15N.

[0063] (Number of materials required) The number of materials required in addition to brackets and laminated glass was evaluated (additional equipment required is indicated in parentheses). The evaluation criteria were as follows: ○: The number of materials was 1. ×: The number of materials was 2 or more.

[0064] (Additional equipment) During implementation, we evaluated whether additional equipment was required (in addition to the coating machine and heating device) compared to Example 1 (if additional equipment was required, it was indicated in parentheses). The evaluation criteria were as follows: ○: No additional equipment was needed. ×: No additional equipment was required.

[0065] <Quality Evaluation> (Adhesive shape) The shape of the adhesive applied to the parts was visually compared before and after heating (before attachment to the glass plate). The evaluation criteria were as follows: ○: There was no change, or very little change, in the shape of the adhesive. ×: There was a change in the shape of the adhesive.

[0066] (Part damage) At the end of the experiment, the entire assembly of the components bonded to the glass was visually inspected to check for any damage. The evaluation criteria were as follows: ○: No damage was detected. ×: Damage has been detected.

[0067] (Glass temperature rise) From the start of the experiment until the adhesive surface of the bracket was brought into contact with the surface of the shielding layer of the laminated glass after the first heating, the temperature of the glass plate was continuously measured across the entire black ceramic surface near the bracket attachment point, and the maximum temperature rise (°C) was determined. Maximum temperature rise Δt max Let t0 be the temperature of the glass plate before heating, and t1 be the maximum temperature of the glass plate, then t1- t0 The evaluation criteria were as follows: ○: The maximum temperature rise was less than 50°C. △: The maximum temperature rise was between 50°C and 90°C. ×: The maximum temperature rise was over 90°C.

[0068] [Table 1]

[0069] As shown in Table 1, in Examples 1 to 7 and Example 10, where at least a portion of the adhesive was heated before attachment to the glass sample, the amount of material required for manufacturing was reduced, and sufficient temporary bonding was achieved without the need for additional equipment such as an injection molding machine. Furthermore, in Examples 1 to 7, where the heating of the adhesive before attachment (first heating) was performed in a windless environment, all evaluation items were satisfactory.

[0070] Although the present invention has been described above based on embodiments and examples, the present invention is not limited to these embodiments and examples. Furthermore, the above embodiments can be modified, altered, replaced, added, deleted, and combined in various ways within the scope of the claims, and these also fall within the technical scope of the present invention. [Explanation of symbols]

[0071] 1. Vehicle window glass with parts 10 Vehicle window glass 11, 12 Glass plate 15 Interlayer 20 Adhesives 21 Main adhesive portion 22 Temporary adhesive portion 30 parts 31. Bonding surfaces of parts 50 Shielding layer (heat absorption layer) 80 Heating means 81 Electromagnetic wave irradiation section 85 Power Supply and Control Unit

Claims

1. A method for manufacturing a vehicle window glass with components, wherein a vehicle glass plate and components are bonded together via an adhesive, The application process involves applying adhesive to the parts. A first heating step of heating at least a portion of the applied adhesive, and A method for manufacturing a vehicle window glass with a component, comprising, in this order, an attachment step of attaching the component and the vehicle window glass via the adhesive.

2. The method for manufacturing a vehicle window glass with a component according to claim 1, wherein in the first heating step, at least a portion of the adhesive surface, which is the surface that comes into contact with the main surface of the vehicle window glass in the mounting step, is heated.

3. A method for manufacturing a vehicle window glass with a component according to claim 2, further comprising a second heating step of heating and curing the adhesive after the mounting step.

4. The method for manufacturing a vehicle window glass with a component according to claim 1 or 2, wherein the adhesive is an adhesive whose curing is accelerated by heat.

5. The method for manufacturing a vehicle window glass with a component according to claim 1 or 2, wherein the component is a resin component for mounting in-vehicle equipment.

6. A method for manufacturing a vehicle window glass with a component according to claim 1 or 2, further comprising heating the vehicle window glass before the aforementioned installation step.

7. In the first heating step, the first portion of the applied adhesive is heated, The method for manufacturing a vehicle window glass with a component according to claim 3, wherein in the second heating step, the second part other than the first part, or the entire adhesive, is heated.

8. A method for manufacturing a vehicle window glass with components according to claim 1 or 2, wherein at least the heating in the first heating step is performed without wind.

9. The aforementioned vehicle window glass is equipped with a heat-absorbing layer, The method for manufacturing a vehicle window glass with a component according to claim 7, wherein the second heating step includes locally heating the heat absorption layer and transferring heat from the heat absorption layer to the adhesive.

10. The method for manufacturing a vehicle window glass with components according to claim 3, wherein the first heating step and the second heating step are performed using a near-infrared heater.

11. The method for manufacturing a vehicle window glass with a component according to claim 3, wherein the vehicle window glass is laminated glass in which two glass plates are joined together with an interlayer film in between.

12. The method for manufacturing a vehicle window glass with components according to claim 11, wherein in the second heating step, the temperature of the interlayer does not exceed 100°C.

13. The method for manufacturing a vehicle window glass with a component according to claim 9, wherein the heat-absorbing layer is a ceramic space-fired film provided on the peripheral edge of the vehicle window glass.

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