WO2011158652A1 - 透光性硬質基板積層体の製造方法 - Google Patents
透光性硬質基板積層体の製造方法 Download PDFInfo
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- WO2011158652A1 WO2011158652A1 PCT/JP2011/062619 JP2011062619W WO2011158652A1 WO 2011158652 A1 WO2011158652 A1 WO 2011158652A1 JP 2011062619 W JP2011062619 W JP 2011062619W WO 2011158652 A1 WO2011158652 A1 WO 2011158652A1
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- light
- substrate
- hard substrate
- translucent hard
- translucent
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- 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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/02—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
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- 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
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- 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
- B32B17/10706—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 being photo-polymerized
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- 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
- B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
- B32B17/10816—Making laminated safety glass or glazing; Apparatus therefor by pressing
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1043—Subsequent to assembly
- Y10T156/1044—Subsequent to assembly of parallel stacked sheets only
Definitions
- the present invention relates to a method for producing a translucent hard substrate laminate, and more particularly to a method for producing a plate glass laminate for producing protective glass for a display element.
- Display devices of various electronic devices such as TVs, notebook computers, car navigation systems, calculators, mobile phones, electronic notebooks, and PDAs (Personal Digital Assistants) include liquid crystal displays (LCD), organic EL displays (OELD), electroluminescent displays ( Display elements such as ELD), field emission displays (FED), and plasma displays (PDP) are used. And in order to protect a display element, it is common to install the plate glass product for protection facing a display element. Recently, a conductive film having a predetermined pattern is provided on the surface of a protective flat glass product to often serve as a touch panel.
- LCD liquid crystal displays
- OELD organic EL displays
- ELD electroluminescent displays
- FED field emission displays
- PDP plasma displays
- This flat glass product is obtained by processing a flat glass into a size and shape suitable for each display device. In order to meet the price level required in the market, it is possible to process a large amount of flat glass products with high production efficiency. Desired.
- Patent Document 1 proposes a method for increasing the production efficiency of a sheet glass product. Specifically, “a large number of material glass sheets (1) are stacked, and each material glass sheet (1) is integrally fixed by a peelable fixing material (2) interposed between each material glass sheet (1). Forming the material glass block (A), dividing the material glass block (A) in the plane direction to form a small-area divided glass block (B), and processing at least the outer periphery of the divided glass block (B) A product glass block (C) having a product shape in plan view is formed, and after the end face processing of the product glass block (C), the product glass block (C) is individually separated. “Processing method” is proposed (claim 1).
- Patent Document 1 states that “the fixing material (2) interposed between the respective material glass plates (1) is cured when irradiated with ultraviolet rays, and is cured by softening the cured state when heated. It is described that “the material is used” (claim 4). As a result, "When a photocurable liquid sticking agent is interposed between the upper and lower material plate glasses and pressed in the vertical direction, the liquid sticking agent spreads in a film with a uniform thickness over the entire surface between the upper and lower material plate glasses. In this state, when the infrared rays are irradiated, the liquid sticking agent spread in the form of a film is cured and the upper and lower plate glasses are fixed together, so that a large number of material plate glasses are stacked quickly and accurately.
- a method of using a roller is known as a high-precision bonding method for sheet glass.
- the bonding roller is moved from the bonding start to the bonding end.
- the base glass (G) is pressed and bonded to the object to be bonded (F) while the adsorbent is retracted from the adsorption position to the retreat position prior to the adhesion movement of the adhesion roller.
- the method is described. According to this, it is supposed that the base glass G and the bonding object F can always be suitably bonded while reliably preventing air from being sandwiched between both bonding surfaces.
- the position shift of bonding object (F) and base glass (G) is optically detected with a shift
- the adhesive layer covered with release paper is formed on one side of the object to be bonded, the release paper is peeled off at the time of bonding, and the adhesive layer may be formed of an ultraviolet curable resin, In that case, after bonding G and F with the bonding apparatus described in Patent Document 2, it is also described that the adhesive layer may be cured.
- Patent Document 1 According to the processing method of plate glass described in Patent Document 1, it is possible to manufacture a plate glass product having a predetermined shape with high production efficiency. However, depending on the electronic device, it may be required to form a desired print pattern (for example, the design of a display screen of a mobile phone) on the plate glass. In such a case, the printed pattern has high positional accuracy. (For example, an allowable error of about 10 to 30 ⁇ m) is required.
- the glass plates to be bonded are positioned and then pressed by an adhesive roller to bond them together.
- an ultraviolet curable resin may be formed as an adhesive
- the ultraviolet curable resin before curing is liquid and fluid, so that the plate glass is bonded with high thickness accuracy.
- the thickness accuracy is insufficient, the laminated glass 51 is distorted through the fixing agent (see FIG. 18), which causes troubles such as easy removal from the forming device during shape processing and reduced processing accuracy.
- the method described in Patent Document 2 since it is necessary to bend the glass, there is a risk of breaking during bonding. There is also a possibility that the glass sheet is displaced during bonding with a roller.
- an object of the present invention is to provide a method for producing a light-transmitting hard substrate laminate capable of improving the thickness accuracy while reducing the risk of cracking. Moreover, this invention makes it another subject to provide the manufacturing method of the plate-shaped product using the manufacturing method of the said translucent hard board
- the present inventor has intensively studied to solve the above-mentioned problems, and as a result, the hardened surfaces of the light-transmitting hard substrates are opposed to each other in a positional relationship so that the bonding surfaces are parallel to each other, and both hard substrates are maintained in a parallel state. It was found that a method of preliminarily laminating using a photo-curable adhesive, roll pressing the bonded translucent hard substrate, and then curing the adhesive is effective. .
- the present invention completed on the basis of the above knowledge, in one aspect, 1) preparing a first translucent hard substrate; 2) preparing a second translucent hard substrate; 3) A step of applying a photocurable sticking agent to the first surface of the first translucent hard substrate and / or the first surface of the second translucent hard substrate; 4) The process of making the 1st surface of a 1st translucent hard substrate and the 1st surface of a 2nd translucent hard substrate oppose so that both surfaces may become parallel, 5) Applying pressure to the first surface of the first light-transmitting hard substrate and the first surface of the second light-transmitting hard substrate while maintaining the parallel state, both light-transmitting properties Pre-bonding the hard substrate; 6) roll pressing the pre-bonded translucent hard substrate; 7) After step 6), irradiating light for curing the entire fixing agent sandwiched between the two translucent hard substrates to form a translucent hard substrate laminate; 8) Considering the light-transmitting hard substrate laminate as a first light-transmitting hard substrate, steps 1) to 7) are repeated at
- step (5) and step (6), 5 ′ While maintaining the pressure, the light for curing only the outer peripheral portion of the fixing agent sandwiched between the two light-transmitting hard substrates and radiating is irradiated to temporarily fix the light-transmitting hard substrate laminate.
- step (6) and step (7), 6 ' Irradiate light for curing only the outer peripheral portion of the sticking agent spread between both translucent hard substrates, or irradiate the whole sticking agent with light of lower energy than in step (7). Then, a step of forming the temporarily fixed translucent hard substrate laminate is performed.
- a mark for alignment is attached to the surface of each translucent hard substrate, and the step (5 ′) is performed. And in step 4) or step 5), adjusting the position in the surface direction while imaging the mark with the imaging device.
- a mark for alignment is attached to the surface of each light-transmitting hard substrate, and step (6 ′) And performing position adjustment in the surface direction of the light-transmitting hard substrate preliminarily bonded while imaging the mark with the imaging device between the step (6) and the step (6 ′).
- the first light-transmitting hard substrate is aligned from the second surface side of the first light-transmitting hard substrate.
- An image pickup device for picking up a mark for use in imaging, and an image pickup device for picking up a mark for alignment of the second light-transmitting hard substrate from the first or second surface side of the second light-transmitting hard substrate Provided.
- step (7) is performed by irradiating light toward the surface of the second light-transmitting hard substrate.
- a predetermined printing pattern for performing one of the functions of a plate-like product is provided on the surface of each light-transmitting hard substrate. And / or a plating pattern.
- the fixing agent contains a particulate material.
- the amount of light irradiated in the step (7) is measured by an integrating illuminometer using a 365 nm light receiver, it is in the range of 1000mJ / cm 2 ⁇ 5000mJ / cm 2.
- the light-transmitting hard substrate is a plate glass.
- step (7) light is irradiated while changing the incident angle.
- step (7) is performed while the translucent hard substrate laminate is being conveyed by a conveyor.
- 9) Divide the translucent hard substrate laminate obtained using the above-described method for producing a translucent hard substrate laminate in the thickness direction to form a desired number of divided translucent hard substrate laminates. And a process of 10) A step of performing a desired shape processing on each of the divided translucent hard substrate laminates; 11) The process of peeling the translucent hard board
- a predetermined printing pattern and / or plating pattern for performing one of the functions of the plate-shaped product is attached to the surface of each light-transmitting hard substrate.
- irradiation with light for curing the uncured fixing agent toward the side surface of the divided light-transmitting hard substrate laminate is included.
- the step (11) includes immersing the translucent hard substrate laminate after shape processing in warm water to soften the adhesive in a film form. Including that.
- a translucent hard substrate laminate can be manufactured with high thickness accuracy while reducing the risk of cracking.
- a plate-shaped product can be manufactured industrially with high dimensional accuracy.
- the present invention can be suitably used for a method for mass-producing protective glass including glass for a touch panel of a display element, for example.
- substrate It is a schematic diagram which shows the example of the lower surface of an upper stage. It is a figure which shows the state which mounted the 1st board
- a translucent hard substrate laminate In one embodiment of the method for producing a translucent hard substrate laminate according to the present invention, 1) preparing a first translucent hard substrate; 2) preparing a second translucent hard substrate; 3) A step of applying a photocurable sticking agent to the first surface of the first translucent hard substrate and / or the first surface of the second translucent hard substrate; 4) The process of making the 1st surface of a 1st translucent hard substrate and the 1st surface of a 2nd translucent hard substrate oppose so that both surfaces may become parallel, 5) Applying pressure to the first surface of the first light-transmitting hard substrate and the first surface of the second light-transmitting hard substrate while maintaining the parallel state, both light-transmitting properties Pre-bonding the hard substrate; 6) roll pressing the pre-bonded translucent hard substrate; 7) After step 6), irradiating light for curing the entire fixing agent sandwiched between the two translucent hard substrates to form a translucent hard substrate laminate; 8) Considering the light-transmitting hard substrate laminate as a first light-transmitting hard
- a translucent hard substrate to be processed is prepared.
- the light-transmitting hard substrate is not particularly limited, but plate glass (material plate glass, glass substrate with a transparent conductive film, glass substrate on which electrodes and circuits are formed, etc.), sapphire substrate, quartz substrate, plastic substrate, magnesium fluoride Examples include substrates.
- Examples of the glass include tempered glass. Not particularly limited on the size of the light-transmitting hard substrate, but typically have a 2 degree of area 10000 ⁇ 250000mm, having a thickness of about 0.1 ⁇ 2 mm.
- Each translucent hard substrate is generally the same size.
- substrate can be attached
- the print pattern include a mobile phone display screen design
- the plating pattern include a metal wiring pattern such as Al or AlNd, and a rotary encoder provided with a chromium plating pattern.
- a photo-curable fixing agent is applied to the first surface of the first translucent hard substrate and / or the first surface of the second translucent hard substrate.
- the photo-curable sticking agent is a sticking agent that is cured by irradiation with light such as ultraviolet rays and softens when heated to a high temperature, and various sticking agents are known.
- the photocurable fixing agent used in the present invention any known one can be used and there is no particular limitation.
- the photo-curable sticking agent may be applied to the bonding surface of either one of the light-transmitting hard substrates, but from the viewpoint of improving adhesiveness, it should be applied to the bonding surfaces of both of the light-transmitting hard substrates. Is preferred.
- Examples of the photocurable fixing agent suitably used in the present invention include (A) polyfunctional (meth) acrylate, (B) monofunctional (meth) acrylate, and (C) as described in WO2008 / 018252, for example.
- the adhesive composition containing a photoinitiator is mentioned.
- (A) As a polyfunctional (meth) acrylate two or more (meth) acryloylated polyfunctional (meth) acrylate oligomer / polymer or two or more (meth) acryloyl groups at the oligomer / polymer terminal or side chain Polyfunctional (meth) acrylate monomers having can be used.
- 1,2-polybutadiene-terminated urethane (meth) acrylate for example, “TE-2000”, “TEA-1000” manufactured by Nippon Soda Co., Ltd.
- hydrogenated product thereof for example, “TEAI-1000” manufactured by Nippon Soda Co., Ltd.
- 1,4-polybutadiene terminated urethane (meth) acrylate eg “BAC-45” manufactured by Osaka Organic Chemical Co., Ltd.
- polyisoprene terminated (meth) acrylate for example, “UV-2000B”, “UV-3000B”, “UV-7000B” manufactured by Nippon Synthetic Chemical Co., Ltd.
- bifunctional (meth) acrylate monomer examples include 1,3-butylene glycol di (meth) acrylate, 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 1,9- Nonanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, dicyclopentanyl di (meth) acrylate, 2-ethyl-2-butyl-propanediol di (meth) acrylate, neopentyl glycol modified trimethylolpropane Di (meth) acrylate, stearic acid-modified pentaerythritol di (meth) acrylate, polypropylene glycol di (meth) acrylate, 2,2-bis (4- (meth) acryloxydiethoxyphenyl) propane, 2,2-bis (4- (meth) acryl Propoxy phenyl
- Examples of the trifunctional (meth) acrylate monomer include trimethylolpropane tri (meth) acrylate and tris [(meth) acryloxyethyl] isocyanurate.
- Examples of tetrafunctional or higher functional (meth) acrylate monomers include dimethylolpropane tetra (meth) acrylate, pentaerythritol tetra (meth) acrylate, pentaerythritol ethoxytetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, or dipenta Examples include erythritol hexa (meth) acrylate. Of these, dicyclopentanyl di (meth) acrylate is preferred.
- (A) 1 or more types in the group which consists of a polyfunctional (meth) acrylate oligomer / polymer and a bifunctional (meth) acrylate monomer are preferable, and a polyfunctional (meth) acrylate oligomer / polymer and a bifunctional (meta) It is more preferable to use an acrylate monomer in combination.
- a polyfunctional (meth) acrylate oligomer / polymer and a bifunctional (meth) acrylate monomer are used in combination, the mixing ratio is 100 parts by mass in total of the polyfunctional (meth) acrylate oligomer / polymer and the bifunctional (meth) acrylate monomer.
- polyfunctional (meth) acrylate oligomer / polymer: bifunctional (meth) acrylate monomer 10 to 90:90 to 10 is preferable, and 30 to 70:70 to 30 is more preferable.
- Monofunctional (meth) acrylate monomers include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate , Isodecyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, phenyl (meth) acrylate, cyclohexyl (meth) acrylate, dicyclopentanyl (meth) acrylate, dicyclopentenyl (meth) acrylate, dicyclo Pentenyloxyethyl (meth) acrylate, isobornyl (meth) acrylate, methoxylated cyclodecatriene (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxy
- phenol (ethylene oxide 2 mol modified) (meth) acrylate, 2- (1,2-cyclohexacarboximido) ethyl (meth) acrylate and 2-hydroxy-3-phenoxypropyl (meth) acrylate Preferably, one or more members selected from the group consisting of phenol (ethylene oxide 2-mol modified) (meth) acrylate, 2- (1,2-cyclohexacarboximido) ethyl (meth) acrylate and / or 2-hydroxy- More preferably, 3-phenoxypropyl (meth) acrylate is used in combination.
- Phenol (ethylene oxide 2 mol modified) (meth) acrylate: 2- (1,2-cyclohexacarboximido) ethyl (meth) acrylate and / or 2-hydroxy-3 in a mass ratio in a total of 100 parts by mass of acrylate -Phenoxypropyl (meth) acryl Over preparative 10-90: 90-10 is preferred, 30-45: 70-55 is more preferable.
- (A) If the polyfunctional (meth) acrylate is 5 parts by mass or more, there is no fear that the initial adhesiveness is lowered, and if it is 95 parts by mass or less, releasability can be secured.
- the cured fixing agent is peeled off into a film by being immersed in warm water.
- the content of (B) monofunctional (meth) acrylate is more preferably 40 to 80 parts by mass in 100 parts by mass of the total amount of (A) and (B).
- the photopolymerization initiator is blended for sensitization with visible light or ultraviolet active light to promote photocuring of the resin composition, and various known photopolymerization initiators can be used. . Specifically, benzophenone or a derivative thereof; benzyl or a derivative thereof; anthraquinone or a derivative thereof; benzoin; a benzoin derivative such as benzoin methyl ether, benzoin ethyl ether, benzoin propyl ether, benzoin isobutyl ether, or benzyl dimethyl ketal; diethoxyacetophenone, 4 Acetophenone derivatives such as t-butyltrichloroacetophenone; 2-dimethylaminoethyl benzoate; p-dimethylaminoethyl benzoate; diphenyl disulfide; thioxanthone or derivatives thereof; camphorquinone; 7,7-dimethyl-2,3-dioxobicycl
- a photoinitiator can be used 1 type or in combination of 2 or more types.
- One or more of the group consisting of [2-hydroxy-ethoxy] -ethyl ester are preferred.
- the content of the photopolymerization initiator is preferably 0.1 to 20 parts by mass, and more preferably 0.5 to 15 parts by mass with respect to 100 parts by mass in total of (A) and (B). If it is 0.1 mass part or more, the effect of hardening acceleration
- the photocurable sticking agent preferably contains a particulate substance (D) that does not dissolve in the sticking agent components (A), (B), and (C).
- the material of the particulate material (D) may be either generally used organic particles or inorganic particles.
- the organic particles include polyethylene particles, polypropylene particles, crosslinked polymethyl methacrylate particles, and crosslinked polystyrene particles.
- Inorganic particles include ceramic particles such as glass, silica, alumina, and titanium. In these, an organic particle is preferable and 1 or more types in the group which consists of bridge
- grains are more preferable.
- the granular material (D) is preferably spherical from the viewpoint of improving processing accuracy, that is, controlling the film thickness of the adhesive.
- the average particle diameter of the particulate substance (D) by the laser method is preferably in the range of 20 to 200 ⁇ m.
- the average particle size of the granular material is 20 ⁇ m or more, the peelability is excellent, and when it is 200 ⁇ m or less, the temporarily fixed member is not easily displaced and excellent in dimensional accuracy.
- a more preferable average particle diameter (D50) from the viewpoints of releasability and dimensional accuracy is 35 ⁇ m to 150 ⁇ m, and more preferably 50 ⁇ m to 120 ⁇ m.
- the particle size distribution is measured by a laser diffraction type particle size distribution measuring device.
- the amount of the granular material (D) used is preferably 0.01 to 20 parts by mass with respect to 100 parts by mass of the total amount of (A) and (B), from the viewpoint of adhesiveness, processing accuracy, and peelability. More preferred is 1 to 10 parts by mass, and most preferred is 0.2 to 6 parts by mass.
- step (4) the first surface of the first translucent hard substrate and the first surface of the second translucent hard substrate are opposed to each other in parallel.
- the light-transmitting hard substrates are opposed so that the light-transmitting hard substrates are exactly overlapped in the surface direction, for example, so that the light-transmitting hard substrates have a predetermined positional relationship in the surface direction.
- a bonding apparatus having a positioning mechanism.
- a bonding device that can mark the surface of each light-transmitting hard substrate for alignment and adjust the position while imaging it with the imaging device. Is more preferable.
- the misalignment may be corrected after bonding both translucent hard substrates, but the position of the adhesive may leak from the bonding surface or scratch the substrate surface. It is desirable to correct the misalignment before bonding.
- the imaging device is preferably installed on the second surface side of the first translucent hard substrate and on the first or second surface side of the second translucent hard substrate.
- the first translucent hard substrate 31 and the second translucent hard substrate 32 adsorbed on the stage 35 having the adsorbing holes 33 are respectively positioned on the surface by the imaging device 30. This represents a state in which the landmark is imaged.
- the alignment is performed by moving the lower stage 35.
- the imaging device for imaging the second light-transmitting hard substrate 32 is installed on the bonding surface (first surface) side of the second light-transmitting hard substrate 32, which obstructs the bonding.
- the stage 35 can be provided with an imaging hole 34.
- the position adjustment of the light-transmitting hard substrate that is, the second light-transmitting hard substrate
- the surface opposite to the bonding surface of the lowermost light-transmitting hard substrate is the second surface of the first light-transmitting hard substrate. Therefore, it is possible to stack the light-transmitting hard substrates with higher positional accuracy as compared with the alignment for imaging the bonding surfaces.
- step (5) while maintaining the parallel state determined in step (4), pressure is applied to the first surface of the first translucent hard substrate and the first surface of the second translucent hard substrate. Applying and bonding together, pre-adhering both translucent hard substrates. Since a photo-curing fixing agent is used, both substrates are not completely bonded only by applying pressure. In this sense, the adhesion here is referred to as “preliminary adhesion”.
- a substrate having a uniform thickness can be obtained by laminating the substrates in parallel, and therefore, the thickness accuracy after the roll press is improved by roll pressing. When the thickness accuracy is improved, troubles during shape processing are reduced. If only roll pressing is performed without pre-adhesion, unevenness in the adhesive thickness tends to occur.
- the substrate when pre-adhesion is not performed, the substrate may be greatly displaced during roll press, or the adhesive may not be spread over the entire surface depending on the application pattern of the adhesive. Not only does the glass come into contact with each other at the part where the fixing agent does not spread, but also a part that is not bonded is generated. The part that is not bonded also causes chipping or cracking during shape processing, which causes a decrease in productivity.
- the sticking agent when pre-adhesion is performed, the sticking agent easily spreads over the entire bonding surface during the roll press regardless of the application pattern of the sticking agent, and this problem can be reduced.
- the adhesive spreads over the bonding surface with a certain thickness. If the amount of the applied sticking agent is too small, the sticking agent does not spread over the entire bonding surface, which causes bubbles to be generated on the bonding surface. When bubbles are generated, the positional accuracy is lowered. If the amount of the applied sticking agent is too large, the sticking agent leaks from the gap between the bonding surfaces. Even if the sticking agent leaks to some extent, it may be wiped off, and this is not a big problem, but if the amount is large, the sticking agent is wasted.
- the pressure at the time of bonding is also related to the spread of the sticking agent. Therefore, it is desired to appropriately adjust the bonding pressure in addition to the amount of the fixing agent.
- a method of using a bonding apparatus having a function of controlling a pressure when the light-transmitting hard substrates are bonded to each other can be considered.
- the specific pressure and time for bonding may be appropriately set in consideration of the above.
- the pressure is 10 g / cm 2 to 800 g / cm 2 , typically 100 g / cm 2 to 700 g / cm 2.
- the time is 10 seconds to 5 minutes, typically 1 to 4 minutes. At this time, heating may be performed. However, since heating may cause the substrate to warp due to internal stress, heating is preferably not performed.
- the thickness of the fixing agent itself.
- a method for controlling the thickness there is a method of mixing a granular material into the fixing agent, as well as a function of controlling the height of the light-transmitting hard substrates when the light-transmitting hard substrates are bonded together.
- a method using a bonding apparatus is conceivable.
- the translucent hard substrate is fixed It is conceivable to store it in a storage place or transport it to an irradiation device. In such a case, it is desired to prevent the displacement of the substrate during transportation and the leakage of the sticking agent during storage. Therefore, between the steps (5) and (6), while maintaining the pressure applied in the step (5), only the outer peripheral portion of the sticking agent that is sandwiched between both translucent hard substrates is cured. For example, the step (5 ′) of forming a temporarily-fixed translucent hard substrate laminate by irradiating light may be performed.
- the outer periphery should be a region with a certain amount of width, but it does not shift when exposed to the inside excessively.
- the purpose of temporary fixing is reduced, and the irradiation time is lengthened, so that the production efficiency is lowered.
- the outer peripheral portion irradiated for temporary fixing has a width of about 5 to 25 mm, more typically about 7 to 17 mm.
- the outer peripheral part which irradiates light exists in the margin area
- the light irradiation history of the part which forms a plate-shaped product can be made uniform, and distortion of the fixing agent is suppressed. As a result, it is possible to suppress distortion of the substrate of the portion.
- the wavelength of light irradiated for temporary fixing may be appropriately changed according to the characteristics of the fixing agent to be used. For example, irradiation with microwaves, infrared rays, visible light, ultraviolet rays, X-rays, ⁇ rays, electron beams, etc. Can do. In general, the irradiation light is ultraviolet light because it can be used easily and has relatively high energy. Thus, in the present invention, light refers to not only visible light but also electromagnetic waves (energy rays) including a wide wavelength region.
- the light irradiated for temporary fixing may be an irradiation amount necessary for temporarily fixing the translucent hard substrate, and is generally 1 to 500 mJ / cm 2 as measured by an integrating illuminometer using a 365 nm light receiver. , Typically from 3 to 300 mJ / cm 2 , more typically from 5 to 500 mJ / cm 2 .
- the irradiation time is generally 1 to 120 seconds, typically about 2 to 60 seconds, and preferably about 2.5 to 20 seconds.
- step (6) the pre-adhered translucent hard substrate is roll-pressed.
- the principle of the roll press is shown in FIG.
- the roll press has at least a pair of rolls 41 installed in the vertical direction, and the substrate 42 sandwiched between the rolls 41 is fed forward by the rotation of the rolls. During this time, the substrate 42 receives pressure in the vertical direction. Since the substrates are preliminarily bonded to each other, the risk of misalignment while passing through the roll press is reduced. On the other hand, the fluidity is maintained because the fixing agent is not cured. For this reason, by passing the pre-adhered translucent hard substrate through a roll press, the fixing agent appropriately flows, and the thickness uniformity is improved.
- the uniformity of the thickness of the fixing agent is higher than that of roll pressing without preliminary bonding. Excess adhesive will flow out of the perimeter of the substrate. Even if air bubbles are generated between the substrates at the time of preliminary bonding, the substrates can be removed while passing through the press.
- the hardened adhesive is only on the outer periphery, its adhesive force is weak, and the hardened portion can be broken by a roll press. If the breakdown does not occur well, the light irradiation in the step (5 ') may not be performed uniformly on the entire outer periphery of the substrate, but the light irradiation on the outer periphery may be performed intermittently. As a result, the fixing agent on the outer periphery of the substrate is divided into an uncured portion and a cured portion, and the cured portion is easily broken from the uncured portion as a starting point.
- the apparatus itself for roll pressing is publicly known and does not require detailed explanation, in the present invention, it is desirable to determine the operating conditions in consideration of the following points.
- the roll is longer than the width of the translucent hard substrate. This is because when a plurality of short rolls are arranged in the axial direction, a gap is generated between the rolls, and it becomes difficult to apply a uniform pressure across the width direction of the substrate.
- the rolls are arranged in pairs so as to sandwich the bonded substrates from above and below, but if there is only one pair of rolls, the substrate is likely to warp, so two or more pairs (for example, two pairs, (3 pairs or 4 pairs) is preferably installed in the plate passing direction. From the viewpoint of preventing the substrate from warping, the roll is preferably not heated.
- the roll press can be operated so that the linear pressure of the roll is 0.1 kN / m to 10 kN / m, typically 0.2 kN / m to 5 kN / m.
- the clearance between the upper and lower rollers may be changed according to the number of bonded sheets.
- the roll press can be operated at a feed rate of 100 to 800 mm / min, typically 150 to 700 mm / min.
- silicone, urethane rubber, and the like are preferred because they do not damage the substrate, do not dissolve with the overflowing adhesive, and provide a desired thickness.
- a light transmitting hard substrate laminate is formed by irradiating light that cures the entire fixing agent sandwiched between both light transmitting hard substrates and spreading.
- the wavelength of light to be irradiated may be appropriately changed according to the characteristics of the fixing agent to be used.
- microwaves, infrared rays, visible light, ultraviolet rays, X-rays, ⁇ rays, electron beams and the like can be irradiated.
- the irradiation light is ultraviolet light because it can be used easily and has relatively high energy.
- light refers to not only visible light but also electromagnetic waves (energy rays) including a wide wavelength region.
- the light source for example, a black light, a high-pressure mercury lamp, an LED light, or a metal halide lamp can be used.
- Dose of the irradiated light as measured by integrating luminometer using 365nm of the light receiver, generally 1000 ⁇ 5000mJ / cm 2, typically in the 1200 ⁇ 4500mJ / cm 2, more typically 1400 ⁇ 4000mJ / cm 2, preferably 1500 ⁇ 3500mJ / cm 2.
- the irradiation time is generally 0.1 to 120 seconds, typically 15 to 75 seconds, and more typically about 20 to 60 seconds.
- step (7) since it is necessary to irradiate light with relatively high energy intensity in relation to curing the entire fixing agent, it is desired to use an irradiation device in consideration of worker safety.
- the irradiation device is not in the vicinity of the roll press machine or when there is a waiting time until irradiation, it is conceivable to transport the translucent hard substrate to the irradiation device or store it in a predetermined storage location. In such a case, it is desired to prevent the displacement of the substrate during transportation and the leakage of the sticking agent during storage. Therefore, between step (6) and step (7), light for curing only the outer peripheral portion of the sticking agent sandwiched between both translucent hard substrates or less energy than step (7).
- Step (6 ') You may implement the process (6 ') which irradiates light to the whole fixing agent and forms a temporarily fixed translucent hard board
- the imaging device 30 is installed on the second surface side and the second translucent hard substrate 32 is moved by hand while imaging the mark by the imaging device 30.
- the first translucent hard substrate 31 can be adsorbed to the stage 35 through the adsorption holes 33. If necessary, the stage 35 can be provided with an imaging hole 34.
- Step (7) can be performed batchwise with a light irradiation source fixed, but in this case, the incident angle of the irradiation light is constant. Especially when the printed pattern is attached to the surface of the hard substrate, it will prevent the light from reaching the adhesive agent on the back side, but if the incident angle of the irradiated light changes, Even if there is a part of the fixing agent that makes it difficult for light to reach from a certain direction, the light easily reaches such part. Therefore, in one embodiment of the present invention, in step (7), light can be irradiated while changing the incident angle.
- a method of changing the incident angle there are a method of moving an irradiation source, a method of moving a substrate, and the like. For example, it is considered to carry out the step (7) while a translucent hard substrate laminate is transported by a conveyor. It is done.
- the sticking agent in a layer away from the irradiation source becomes difficult to harden when the number of stacked layers increases. Also, if the direction of light irradiation is determined randomly, the irradiation history of the light received by the sticking agent inside the translucent hard substrate laminate varies, and the degree of hardening of the sticking agent in the interlayer or in the same layer changes. Become. This is because the fixing agent is cured by light irradiation, but gradually softens as the light irradiation amount increases. In this case, due to the difference in curing strain, the translucent hard substrate may be laminated in a distorted state without being laminated with a uniform thickness.
- Step (7) and step (6 ') include step (7) repeated by step (8) and optionally repeated step (6').
- the variation can be further reduced by adjusting the intensity of the irradiated light.
- the intensity of light is 100 mW / cm 2 or less as measured with an integrating illuminometer using a 365 nm light receiver, and 10 to 100 mW / cm 2 , preferably 50 to 100 mW / cm in consideration of productivity.
- the thickness of the binder is 75 ⁇ m or more, 75 ⁇ 120 [mu] m in view of preventing the dimensional deviation when the light-transmitting rigid substrate laminate processing, and preferably be 75 ⁇ 110 [mu] m.
- step (8) steps (1) to (7) are repeated at least once with the light-transmitting hard substrate laminate obtained in step (7) as the first light-transmitting hard substrate.
- substrate was bonded together is obtained.
- the translucent hard substrates are firmly bonded to each other by curing the fixing agent each time the translucent hard substrates are bonded together. Therefore, even if the number of stacked layers is increased, the problem of displacement as in Patent Document 1 does not occur.
- a plate-like product can be produced from the translucent hard substrate laminate obtained by the above-described method for producing a translucent hard substrate laminate.
- the translucent hard substrate laminate is divided in the thickness direction to form a desired number of divided translucent hard substrate laminates.
- the dividing method is not particularly limited, but a disk cutter (diamond disc, cemented carbide disc), fixed abrasive type or loose abrasive type wire saw, laser beam, etching (eg, chemical etching using hydrofluoric acid, sulfuric acid, etc.) And electrolytic etching) and red tropics (nichrome wire) may be used alone or in combination to divide into rectangular parallelepiped shapes of the same size. Etching can also be used for surface treatment of the cut surfaces after division.
- step (10) desired shape processing is performed on each of the divided light-transmitting hard substrate laminates.
- This process has the advantage that the production speed of the plate-like product can be greatly increased because the divided light-transmitting hard substrate laminate can be integrally processed into the desired plate-like product shape. is there.
- Shape processing may be performed by any known means. For example, grinding with a rotating grindstone, drilling with an ultrasonic vibration drill, end surface processing with a rotating brush, drilling with etching, end surface processing with etching, outer shape processing with etching, burner Flame processing using The processing methods can be used alone or in combination. Etching can also be used for surface treatment after shape processing.
- step (11) the translucent hard substrates laminated by heating the translucent hard substrate laminate after shape processing are peeled off to form a plurality of plate-like products.
- a heating method In order for a sticking agent to soften in a film form and to isolate
- a suitable temperature of the hot water varies depending on the fixing agent employed, but is usually about 60 to 95 ° C., preferably 80 to 90 ° C.
- the fixing agent present on the back side of these patterns is these It is hard to be hardened compared with the part which is not obstructed by the pattern. Therefore, a step of irradiating light for curing the uncured fixing agent toward the side surface of the divided translucent hard substrate laminate can be provided between the step (9) and the step (11). . Since light is irradiated toward the side surface, it is advantageous for curing the fixing agent inside the laminate.
- the amount of irradiation light is generally 1000 to 15000 mJ / cm 2 with respect to one side surface of the light-transmitting hard substrate laminate as measured with an integrating illuminometer using a 365 nm light receiver, typically it is a 1500 ⁇ 10000mJ / cm 2, more typically 2000 ⁇ 9000mJ / cm 2, preferably 4000 ⁇ 8000mJ / cm 2.
- the irradiation time is generally 0.1 to 120 seconds, typically 15 to 75 seconds, and more typically about 20 to 60 seconds.
- the light source for example, a black light, a high-pressure mercury lamp, an LED light, a metal halide lamp, or the like can be used. However, since the irradiation intensity is strong if a high-pressure mercury lamp or a metal halide lamp is used, a further effect can be expected.
- Example of device configuration An example of a translucent hard substrate laminating apparatus that can be used when preliminarily bonding a translucent hard substrate will be described.
- FIG. 1 is a schematic view showing a first example of a translucent hard substrate laminating apparatus according to the present invention.
- the translucent hard substrate laminating apparatus 10 includes a gantry 11, an upper stage 12, a press unit 13, a suction unit 14, a suction hole 15, an LED unit 16, a lower stage 17, a lower stage moving means 18, a side clamp 19, A lower substrate coating unit 20, an upper substrate coating unit 21, an imaging unit 22, and an electrical unit 23 are provided.
- an LED unit 16 is provided for temporarily fixing the outer periphery of the substrate by ultraviolet irradiation. The LED unit 16 is not necessary in the embodiment in which temporary fixing is not performed.
- the gantry 11 is a base part on which each component of the translucent hard substrate laminating apparatus 10 is mounted, and an electrical unit 23 is disposed inside.
- the electrical unit 23 performs sequence control of each component device by PLC (Programmable Logic Controller).
- FIG. 2 is a schematic diagram of the lower surface of the upper stage 12 and shows an example of the arrangement of the suction holes 15.
- a vacuum pump, a vacuum ejector, or the like can be used as the suction unit 14.
- a press unit 13 is connected to the upper part of the upper stage 12 for bonding the upper translucent hard substrate 25 while pressing the upper translucent hard substrate 25 against the lower translucent hard substrate 24.
- the press unit 13 has an elevating cylinder (not shown) that can move the upper stage 12 in the Z direction (vertical direction).
- the pressurizing force, moving speed, pressurizing time, and height are controlled by a servo motor. can do.
- a plurality of LED units 16 for irradiating the lower translucent hard substrate 24 with ultraviolet rays for curing the fixing agent are embedded in the lower surface of the upper stage 12.
- the LED units 16 are arranged along the outer periphery of the upper translucent hard substrate 25 adsorbed by the upper stage 12.
- FIG. 2 shows an example of the arrangement state of the LED units 16.
- the LED unit 16 can be arranged not only in one row but also in two or more rows in parallel, so that the width of the outer peripheral portion to be irradiated can be increased.
- the range of the portion that is not cured can be adjusted by adjusting the arrangement interval of the LED units 16.
- the lower stage 17 holds the lower translucent hard substrate 24 and receives pressure from the upper stage 12 during pressing.
- the lower stage 17 can be moved in the X axis direction, the Y axis direction, and the ⁇ axis direction by the lower stage moving means 18.
- the lower stage moving means 18 includes a ⁇ table that enables a horizontal turning movement, and an X table and a Y table that enable a horizontal movement. These tables are driven by a motor.
- a motor-driven side clamp 19 that is movable in the X-axis direction and the Y-axis direction for positioning the translucent hard substrate placed thereon is provided on the upper surface of the lower stage 17.
- a positioning stopper for placing the translucent hard substrate at a predetermined position may be provided on the upper surface of the lower stage 17.
- the translucent hard substrate is manually placed at a position where the translucent hard substrate is fixed by the stopper.
- the lower translucent hard substrate 24 can also be held by vacuum suction.
- the lower substrate coating unit 20 includes a photo-curing adhesive dispenser 20a and a motor-driven robot 20b connected to the dispenser 20a and movable in the X-axis, Y-axis, and Z-axis directions.
- the fixing agent can be applied to the upper surface of the optical hard substrate 24 in an arbitrary pattern.
- the fixing agent is packed in a syringe and is automatically discharged in a fixed amount.
- the coating amount is controlled by a digital pressure gauge and a coating speed.
- the upper substrate coating unit 21 automatically coats the photocurable adhesive toward the lower surface of the upper translucent hard substrate 25 in a state where the upper translucent hard substrate 25 is held by the upper stage 12. To do.
- the application amount is controlled by a pressure gauge and application time.
- the upper substrate coating unit 21 is provided with a motor-driven robot 21b having a rotation shaft that can rotate in the horizontal direction beside the upper and lower stages, and the tip rotary nozzle 21a is located near the center of the upper stage 12 during coating.
- the fixing agent is applied from the tip of the nozzle 21a. When the application is completed, it is stored beside the upper and lower stages so as not to interfere with the bonding of the translucent hard substrate.
- the imaging unit 22 has alignment marks for alignment provided on the respective surfaces of the upper light-transmitting hard substrate 25 and the lower light-transmitting hard substrate 24 attached at two positions above and below the tip of the arm. An image is taken with the digital camera 22a.
- the electrical unit 23 detects a relative positional shift state between the upper translucent hard substrate 25 and the lower translucent hard substrate 24 based on the captured image information. Based on the detection result, the position of the lower stage 17 is finely adjusted by the lower stage moving means 18 in the X-axis direction, the Y-axis direction, and the ⁇ -axis direction, and an operation for correcting the positional deviation is executed. After correcting the positional deviation, the two light-transmitting hard substrates are bonded together.
- an analog camera can be used in addition to a digital camera using a CCD or CMOS as an image sensor, but a digital camera is preferable from the viewpoint of high resolution.
- the imaging device images each bonding surface of the upper translucent hard substrate and the lower translucent hard substrate, but the imaging device is changed to an arrangement as shown in FIG. can do.
- the image pickup unit 22 is provided with moving means 22b driven by motors in the X-axis and Y-axis directions, and at the time of image pickup, the digital camera 22a moves to a predetermined position where the alignment mark enters the field of view. When the imaging is completed, the digital camera 22a moves so as not to obstruct the pasting of the translucent hard substrates.
- the first translucent hard substrate 26 is placed on the lower stage 17 and fixed to a predetermined position by a side clamp 19 (not shown) (FIG. 3). Placement on the lower stage 17 of the light-transmitting hard substrate 26 can be performed manually, but a large number of light-transmitting hard substrates 26 are stored in a dedicated cassette and automatically placed on the lower stage 17. It may be placed.
- substrate 26 mounted is moved just under the upper stage 12 by the lower stage moving means 18 (not shown) (FIG. 4).
- the upper stage 12 is lowered by the press unit 13.
- the translucent hard substrate 26 is vacuum-sucked by the suction force from the suction hole 15 (not shown) (FIG. 5).
- the adsorbed translucent hard substrate 26 rises with the upper stage 12 while being held, and waits for the second substrate (FIG. 6).
- the second translucent hard substrate 27 is placed on the lower stage 17 and fixed to a predetermined position by a side clamp 19 (not shown) (FIG. 7).
- the fixing agent 28 is applied in a predetermined pattern from the lower substrate coating unit 20 (FIG. 8).
- the alignment mark is imaged by a camera attached to the arm tip of the imaging unit 22. Then, the position of the lower stage 17 is finely adjusted in accordance with the imaging result, and the positions of both translucent hard substrates (26, 27) are adjusted (FIG. 9).
- the nozzle 21a attached to the arm tip of the upper substrate coating unit 21 moves to the vicinity of the center of the first substrate 26 held by the upper stage 12, and the fixing agent 29 is transferred from the nozzle 21a. It is applied to the lower surface of the first translucent hard substrate 26 (FIG. 10).
- the adhesive (28, 29) is applied to the upper and lower translucent hard substrates (26, 27)
- the upper stage 12 is lowered by the press unit 13 and the two translucent hard substrates (26, 27) are applied.
- the adhesive (28, 29) sandwiched between the upper and lower light-transmitting hard substrates spreads over the entire surface of the light-transmitting hard substrate.
- ultraviolet light is irradiated from the LED unit 16 to the outer peripheral portion of the translucent hard substrate (FIG. 11). As a result, only the fixing agent on the outer peripheral portion is cured.
- the light-transmitting hard substrate laminate can be formed by passing the temporarily-fixed light-transmitting hard substrate laminate through a roll press and then performing light irradiation for curing the entire fixing agent. By repeating this procedure, a laminate in which a large number of translucent hard substrates are bonded together is manufactured.
- FIG. 14 is a schematic view showing a second embodiment of a translucent hard substrate laminating apparatus according to the present invention.
- the LED units 16 are arranged on the upper surface of the lower stage 17 along the outer periphery of the lower translucent hard substrate 24 and irradiate ultraviolet rays upward.
- FIG. 15 is a schematic view showing a third embodiment of the translucent hard substrate laminating apparatus according to the present invention.
- the LED units 16 are arranged so as to surround the outer peripheral side surfaces of both light-transmitting hard substrates to be bonded together, and irradiate ultraviolet rays toward the outer peripheral side surfaces.
- the LED unit 16 has a moving means in the Z-axis direction, and can be moved to an optimum height according to the height of the bonding surface. Further, the arrangement of the imaging unit 22 was changed.
- Fixing agent 1 As a polyfunctional (meth) acrylate, 20 parts by mass of “UV-3000B” manufactured by Nihon Gosei Co., Ltd.
- UV-3000B dicyclopentanyl diacrylate
- KAYARAD dicyclopentanyl diacrylate
- R-684 dicyclopentanyl diacrylate
- B As monofunctional (meth) acrylate, 40 parts by mass of 2- (1,2-cyclohexacarboximide) ethyl acrylate (“Aronix M-140” manufactured by Toa Gosei Co., Ltd., hereinafter abbreviated as “M-140”); 25 parts by mass of phenol ethylene oxide 2 mol modified acrylate (“Aronix M-101A” manufactured by Toa Gosei Co., Ltd.) (C) 5 parts by mass of BDK: benzyldimethyl ketal (“IRGACURE651” manufactured by BASF) as a photopolymerization initiator, (D) 1 part by mass (adhesive agent 2) of spherical crosslinked polys
- UV-3000B dicyclopentanyl diacrylate
- KYARAD dicyclopentanyl diacrylate
- R-684 dicyclopentanyl diacrylate
- R-684 15 parts by mass
- C 5 parts by mass of BDK: benzyldimethyl ketal (“IRGACURE651” manufactured by BASF) as a photopolymerization initiator
- a laminating apparatus having the configuration of FIG. 1 described above for a plate glass (horizontal 530 mm ⁇ vertical 420 mm ⁇ thickness 0.7 mm) as a translucent hard substrate. was pre-adhered.
- the arrangement of the imaging devices for alignment is as shown in FIG.
- the operating conditions of the device are as follows.
- Roll press The pre-bonded sheet glass was roll pressed.
- the operating conditions of the roll press are as follows. ⁇ Roll press operating conditions> -Number of roll pairs: 2 -Whether the roll is heated: None-Linear pressure: 0.5 kN / m ⁇ Roll width: 1m ⁇ Feeding speed: 200mm / min ⁇ Roll material: Silicone
- UV irradiation was performed on the entire surface of the plate glass after roll pressing. Irradiation conditions are as follows. ⁇ UV irradiation amount: 2800 mJ / cm 2 (measured by an integrating illuminometer with a 365 nm light receiver) ⁇ UV irradiation time: 40 seconds ⁇ UV light source: Metal halide lamp
- Steps 9) to 11) were performed on a plate glass laminate comprising 10 plate glasses obtained by repeating the lamination.
- a disk cutter diamond disk
- shape processing was performed by sequentially performing grinding with a rotating grindstone, drilling with an ultrasonic vibration drill, and end face processing with a rotating brush.
- this plate glass laminate was immersed in hot water at 85 ° C. and peeled off. As a result, a plurality of laminates were easily obtained for Invention Example 1 and Invention Example 2.
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- Laminated Bodies (AREA)
- Joining Of Glass To Other Materials (AREA)
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- Electroluminescent Light Sources (AREA)
Abstract
Description
1)第一の透光性硬質基板を準備する工程と、
2)第二の透光性硬質基板を準備する工程と、
3)第一の透光性硬質基板の第一の面及び/又は第二の透光性硬質基板の第一の面に光硬化性の固着剤を塗布する工程と、
4)第一の透光性硬質基板の第一の面と第二の透光性硬質基板の第一の面とを両面が平行となるように対向させる工程と、
5)前記平行状態を維持しながら、第一の透光性硬質基板の第一の面と第二の透光性硬質基板の第一の面に圧力を印加して貼り合わせ、両透光性硬質基板を予備接着する工程と、
6)予備接着した透光性硬質基板をロールプレスする工程と、
7)工程6)の後、両透光性硬質基板に挟まれて広がっている固着剤全体を硬化するための光を照射して、透光性硬質基板積層体を形成する工程と、
8)前記透光性硬質基板積層体を第一の透光性硬質基板に見立てて、工程1)~7)を少なくとも1回繰り返し、少なくとも3枚の透光性硬質基板が貼り合わせられた透光性硬質基板積層体を形成する工程と
を含む透光性硬質基板積層体の製造方法である。
工程(5)と工程(6)の間に、
5’)前記圧力を維持したまま、両透光性硬質基板に挟まれて広がっている固着剤の外周部分のみを硬化するための光を照射して、仮留め透光性硬質基板積層体を形成する工程を実施する、又は、
工程(6)と工程(7)の間に、
6’)両透光性硬質基板に挟まれて広がっている固着剤の外周部分のみを硬化するための光を照射して若しくは工程(7)よりも低エネルギーの光を固着剤全体に照射して、仮留め透光性硬質基板積層体を形成する工程
を実施する。
9)上記の透光性硬質基板積層体の製造方法を用いて得られた透光性硬質基板積層体を厚み方向に分割し、所望の数の分割された透光性硬質基板積層体を形成する工程と、
10)分割された透光性硬質基板積層体それぞれに対して所望の形状加工を行う工程と、
11)形状加工後の透光性硬質基板積層体を加熱することで貼り合わせられていた透光性硬質基板同士を剥離し、複数の板状製品を形成する工程と、
を含む板状製品の製造方法である。
1)第一の透光性硬質基板を準備する工程と、
2)第二の透光性硬質基板を準備する工程と、
3)第一の透光性硬質基板の第一の面及び/又は第二の透光性硬質基板の第一の面に光硬化性の固着剤を塗布する工程と、
4)第一の透光性硬質基板の第一の面と第二の透光性硬質基板の第一の面とを両面が平行となるように対向させる工程と、
5)前記平行状態を維持しながら、第一の透光性硬質基板の第一の面と第二の透光性硬質基板の第一の面に圧力を印加して貼り合わせ、両透光性硬質基板を予備接着する工程と、
6)予備接着した透光性硬質基板をロールプレスする工程と、
7)工程6)の後、両透光性硬質基板に挟まれて広がっている固着剤全体を硬化するための光を照射して、透光性硬質基板積層体を形成する工程と、
8)前記透光性硬質基板積層体を第一の透光性硬質基板に見立てて、工程1)~7)を少なくとも1回繰り返し、少なくとも3枚の透光性硬質基板が貼り合わせられた透光性硬質基板積層体を形成する工程と
が実行される。
(B)の中では、フェノール(エチレンオキサイド2モル変性)(メタ)アクリレート、2-(1,2-シクロヘキサカルボキシイミド)エチル(メタ)アクリレート及び2-ヒドロキシ-3-フェノキシプロピル(メタ)アクリレートからなる群のうちの1種以上が好ましく、フェノール(エチレンオキサイド2モル変性)(メタ)アクリレートと、2-(1,2-シクロヘキサカルボキシイミド)エチル(メタ)アクリレート及び/又は2-ヒドロキシ-3-フェノキシプロピル(メタ)アクリレートとを併用することがより好ましい。フェノール(エチレンオキサイド2モル変性)(メタ)アクリレートと2-(1,2-シクロヘキサカルボキシイミド)エチル(メタ)アクリレート及び/又は2-ヒドロキシ-3-フェノキシプロピル(メタ)アクリレートとを併用する場合、その混合比率は、フェノール(エチレンオキサイド2モル変性)(メタ)アクリレートと2-(1,2-シクロヘキサカルボキシイミド)エチル(メタ)アクリレート及び/又は2-ヒドロキシ-3-フェノキシプロピル(メタ)アクリレートの合計100質量部中、質量比で、フェノール(エチレンオキサイド2モル変性)(メタ)アクリレート:2-(1,2-シクロヘキサカルボキシイミド)エチル(メタ)アクリレート及び/又は2-ヒドロキシ-3-フェノキシプロピル(メタ)アクリレート=10~90:90~10が好ましく、30~45:70~55がより好ましい。
照射する光の照射量は、365nmの受光器を使用した積算照度計で測定して、一般に1000~5000mJ/cm2、典型的には1200~4500mJ/cm2であり、より典型的には1400~4000mJ/cm2、好ましくは1500~3500mJ/cm2である。照射時間としては一般に0.1~120秒、典型的には15~75秒、より典型的には20~60秒程度である。
上記の透光性硬質基板積層体の製造方法によって得られた透光性硬質基板積層体から板状製品を製造することができる。
光源としては例えばブラックライト、高圧水銀灯、LEDライト、メタルハライドランプなどを使用することができるが、高圧水銀灯やメタルハライドランプであれば照射強度が強いため、より一層の効果を期待できる。
透光性硬質基板を予備接着する際に使用できる透光性硬質基板貼り合わせ装置の例について説明する。
本実施形態では基板外周への紫外線照射による仮留めを行うためLEDユニット16が備わっている。仮留めを行わない実施形態ではLEDユニット16は不要である。
1.固着剤の作製
以下の(A)~(D)の成分を混合して固着剤を作製した。固着剤は2種類用意した。
(固着剤1)
(A)多官能(メタ)アクリレートとして、日本合成社製「UV-3000B」(ウレタンアクリレート以下「UV-3000B」と略す)20質量部、ジシクロペンタニルジアクリレート(日本化薬社製「KAYARAD R-684」、以下「R-684」と略す)15質量部、
(B)単官能(メタ)アクリレートとして、2-(1,2-シクロヘキサカルボキシイミド)エチルアクリレート(東亜合成社製「アロニックスM-140」、以下「M-140」と略す)40質量部、フェノールエチレンオキサイド2モル変成アクリレート(東亜合成社製「アロニックスM-101A」)25質量部、
(C)光重合開始剤としてBDK:ベンジルジメチルケタール(BASF社製「IRGACURE651」)5質量部、
(D)(A)~(C)に溶解しない粒状物質として平均粒径(D50)は102.6μmの球状架橋ポリスチレン粒子(ガンツ化成社製「GS-100S」)1質量部
(固着剤2)
(A)多官能(メタ)アクリレートとして、日本合成社製「UV-3000B」(ウレタンアクリレート以下「UV-3000B」と略す)20質量部、ジシクロペンタニルジアクリレート(日本化薬社製「KAYARAD R-684」、以下「R-684」と略す)15質量部、
(B)単官能(メタ)アクリレートとして、2-ヒドロキシ-3-フェノキシプロピルアクリレート(東亜合成社製「アロニックスM-5700」、以下「M-5700」と略す)40質量部、フェノールエチレンオキサイド2モル変成アクリレート(東亜合成社製「アロニックスM-101A」)25質量部、
(C)光重合開始剤としてBDK:ベンジルジメチルケタール(BASF社製「IRGACURE651」)5質量部、
(D)(A)~(C)に溶解しない粒状物質として平均粒径(D50)は102.6μmの球状架橋ポリスチレン粒子(ガンツ化成社製「GS-100S」)1質量部
透光性硬質基板として位置合わせ用の目印が付された板ガラス(横530mm×縦420mm×厚み0.7mmの板ガラス)を先述した図1の構成を有する貼り合わせ装置を使用して予備接着した。ただし、位置合わせのための撮像装置の配置は図16-1に示す通りとした。装置の運転条件は以下である。
<貼り合わせ装置運転条件>
・貼り合わせ圧力:400g/cm2
・貼り合わせ時間:180秒
・上側板ガラスへの固着剤塗布量:5g
・下側板ガラスへの固着剤塗布量:33g
・仮留め用UV照射量:20mJ/cm2(365nmの受光器による積算照度計による測定)
・仮留め用UV照射時間:3秒
・UV照射する外周部分の幅:7mm
・UV光源:LEDライト
予備接着した板ガラスをロールプレスした。ロールプレスの運転条件は以下である。
<ロールプレス運転条件>
・ロールペア数:2
・ロールの加熱有無:無し
・線圧力:0.5kN/m
・ロール幅:1m
・送り速度:200mm/分
・ロール材質:シリコーン
ロールプレス後の板ガラスの表面全体に対して、UV照射を行った。照射条件は以下である。
・UV照射量:2800mJ/cm2(365nmの受光器による積算照度計による測定)
・UV照射時間:40秒
・UV光源:メタルハライドランプ
上記の2~4の工程を繰り返して10枚の板ガラスを積層した。
予備接着せずに、発明例と同量の固着剤を上側及び下側の板ガラスに塗布し、手で貼り合わせた後、図16-2に示すような撮像装置の配置を用いて位置合わせを手動で行った他は発明例と同様の手順で10枚の板ガラスを積層した。
上記のようにして得られた板ガラス積層体に対して、三次元座標測定機(東京精密製「SVA600A」)により平面度を測定した。測定点は160点とした。結果を表1に示す。発明例の方が高い平面度が得られていることが分かる。
発明例1と発明例2について、加工剥離試験を行った。
積層の繰り返しにより得られた、板ガラス10枚からなる板ガラス積層体について、工程9)~11)を行った。
工程9)では、円板カッター(ダイヤモンドディスク)を使用し、多数の直方体形状(横100mm×縦55mm)に分割した。工程10)では、回転砥石による研削、超音波振動ドリルによる孔開け、回転ブラシによる端面加工を順次行い、形状加工した。工程11)では、この板ガラス積層体を85℃の温水に浸漬して剥離した。
その結果、発明例1と発明例2について、複数の積層体が容易に得られた。発明例1と発明例2について、直方体の形状は均一であった。
発明例1と発明例2について、板ガラスとして、横530mm×縦420mm×厚み0.7mmの、めっきパターンを付した板ガラスを使用した場合も、同様の好ましい結果が得られた。
11 架台
12 上側ステージ
13 プレスユニット
14 吸引ユニット
15 吸引孔
16 LEDユニット
17 下側ステージ
18 下側ステージ移動手段
19 サイドクランプ
20 下側基板用塗布ユニット
20a ディスペンサー
20b ロボット
21 上側基板用塗布ユニット
22 撮像ユニット
22a デジタルカメラ
22b 移動手段
23 電装ユニット
24 下側の透光性硬質基板
25 上側の透光性硬質基板
26、27 透光性硬質基板
28、29 固着剤
30 撮像装置
31 第一透光性硬質基板
32 第二透光性硬質基板
33 吸着孔
34 撮像用の穴
35 ステージ
41 ロール
42 貼り合わせられた基板
51 歪んだガラス積層体
Claims (15)
- 1)第一の透光性硬質基板を準備する工程と、
2)第二の透光性硬質基板を準備する工程と、
3)第一の透光性硬質基板の第一の面及び/又は第二の透光性硬質基板の第一の面に光硬化性の固着剤を塗布する工程と、
4)第一の透光性硬質基板の第一の面と第二の透光性硬質基板の第一の面とを両面が平行となるように対向させる工程と、
5)前記平行状態を維持しながら、第一の透光性硬質基板の第一の面と第二の透光性硬質基板の第一の面に圧力を印加して貼り合わせ、両透光性硬質基板を予備接着する工程と、
6)予備接着した透光性硬質基板をロールプレスする工程と、
7)工程6)の後、両透光性硬質基板に挟まれて広がっている固着剤全体を硬化するための光を照射して、透光性硬質基板積層体を形成する工程と、
8)前記透光性硬質基板積層体を第一の透光性硬質基板に見立てて、工程1)~7)を少なくとも1回繰り返し、少なくとも3枚の透光性硬質基板が貼り合わせられた透光性硬質基板積層体を形成する工程と
を含む透光性硬質基板積層体の製造方法。 - 工程(5)と工程(6)の間に、
5’)前記圧力を維持したまま、両透光性硬質基板に挟まれて広がっている固着剤の外周部分のみを硬化するための光を照射して、仮留め透光性硬質基板積層体を形成する工程を実施する、又は、
工程(6)と工程(7)の間に、
6’)両透光性硬質基板に挟まれて広がっている固着剤の外周部分のみを硬化するための光を照射して若しくは工程(7)よりも低エネルギーの光を固着剤全体に照射して、仮留め透光性硬質基板積層体を形成する工程
を実施する請求項1記載の透光性硬質基板積層体の製造方法。 - 各透光性硬質基板の表面に位置合わせのための目印が付されており、工程(5’)を実施し、且つ、工程4)又は工程5)において当該目印を撮像装置で撮像しながら面方向の位置調整を行うことを含む請求項2記載の透光性硬質基板積層体の製造方法。
- 各透光性硬質基板の表面に位置合わせのための目印が付されており、工程(6’)を実施し、且つ、工程(6)と工程(6’)の間に、当該目印を撮像装置で撮像しながら予備接着した透光性硬質基板の面方向の位置調整を行うことを含む請求項2記載の透光性硬質基板積層体の製造方法。
- 第一の透光性硬質基板の第二の面側から第一の透光性硬質基板の位置合わせのための目印を撮像する撮像装置と、第二の透光性硬質基板の第一又は第二の面側から第二の透光性硬質基板の位置合わせのための目印を撮像する撮像装置が設けられる請求項3又は4記載の透光性硬質基板積層体の製造方法。
- 工程(7)は、第二の透光性硬質基板の表面に向かって光を照射することにより行う請求項1~5何れか一項記載の透光性硬質基板積層体の製造方法。
- 各透光性硬質基板の表面には板状製品の機能の一つを奏するための所定の印刷パターン及び/又はめっきパターンが付されている請求項1~6何れか一項記載の透光性硬質基板積層体の製造方法。
- 前記固着剤は粒状物質を含有する請求項1~7何れか一項記載の透光性硬質基板積層体の製造方法。
- 工程(7)における光の照射量は、365nmの受光器を使用した積算照度計で測定して、1000mJ/cm2~5000mJ/cm2の範囲である請求項1~8何れか一項記載の透光性硬質基板積層体の製造方法。
- 透光性硬質基板が板ガラスである請求項1~9何れか一項記載の透光性硬質基板積層体の製造方法。
- 工程(7)では入射角を変化させながら光を照射する請求項1~10何れか一項記載の透光性硬質基板積層体の製造方法。
- 工程(7)は透光性硬質基板積層体をコンベアで搬送中に実施する請求項11記載の透光性硬質基板積層体の製造方法。
- 9)請求項1~12何れか一項記載の透光性硬質基板積層体の製造方法を用いて得られた透光性硬質基板積層体を厚み方向に分割し、所望の数の分割された透光性硬質基板積層体を形成する工程と、
10)分割された透光性硬質基板積層体それぞれに対して所望の形状加工を行う工程と、
11)形状加工後の透光性硬質基板積層体を加熱することで貼り合わせられていた透光性硬質基板同士を剥離し、複数の板状製品を形成する工程と、
を含む板状製品の製造方法。 - 各透光性硬質基板の表面には板状製品の機能の一つを奏するための所定の印刷パターン及び/又はめっきパターンが付されており、工程(9)と工程(11)の間に、分割された透光性硬質基板積層体の側面に向かって未硬化の固着剤を硬化させるための光を照射することを含む請求項13記載の板状製品の製造方法。
- 工程(11)は、温水に形状加工後の透光性硬質基板積層体を浸漬し、固着剤をフィルム状に軟化させることを含む請求項13又は14記載の板状製品の製造方法。
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Also Published As
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KR20130100927A (ko) | 2013-09-12 |
HK1181030A1 (zh) | 2013-11-01 |
US20130081752A1 (en) | 2013-04-04 |
US9061485B2 (en) | 2015-06-23 |
CN102947233B (zh) | 2016-01-27 |
TW201202040A (en) | 2012-01-16 |
JPWO2011158652A1 (ja) | 2013-08-19 |
CN102947233A (zh) | 2013-02-27 |
JP5812990B2 (ja) | 2015-11-17 |
MY166643A (en) | 2018-07-17 |
TWI543871B (zh) | 2016-08-01 |
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