WO2022244750A1 - ガラス板構成体及びガラス板構成体の製造方法 - Google Patents
ガラス板構成体及びガラス板構成体の製造方法 Download PDFInfo
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- WO2022244750A1 WO2022244750A1 PCT/JP2022/020446 JP2022020446W WO2022244750A1 WO 2022244750 A1 WO2022244750 A1 WO 2022244750A1 JP 2022020446 W JP2022020446 W JP 2022020446W WO 2022244750 A1 WO2022244750 A1 WO 2022244750A1
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- Prior art keywords
- plate
- plate member
- glass
- main surface
- glass plate
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Images
Classifications
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- 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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- 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
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- B32B17/10165—Functional features of the laminated safety glass or glazing
- B32B17/10321—Laminated safety glass or glazing containing liquid layers
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- 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
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- 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
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- B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
- B32B17/10899—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin
- B32B17/10908—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin in liquid form
- B32B17/10917—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin in liquid form between two pre-positioned glass layers
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
- C03C27/06—Joining glass to glass by processes other than fusing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
- H04R7/06—Plane diaphragms comprising a plurality of sections or layers
- H04R7/08—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers separated by air or other fluid
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- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
Definitions
- the present invention relates to a glass plate structure and a method for manufacturing a glass plate structure.
- Patent Document 1 describes a glass plate structure in which a liquid layer is provided between at least a pair of plate members. .
- the overlapping plate materials also have a curved surface shape. Therefore, when stacking the plate materials, a shape error occurs in the glass structure depending on the direction of stacking, such as whether the curved concave sides face each other or the convex side and the concave side face each other. For example, if the convex surface side of one plate member and the concave surface side of the other plate member are stacked so as to face each other, the gap between the plate members tends to widen at the outer edges of the plate members, and the relative positions of the plate members are not stable. Further, in some cases, cracks or peeling may occur in the sealing portion that seals the outer edges of the plate members.
- an object of the present invention is to provide a glass plate structure and a method for manufacturing the glass plate structure that reduce the shape error after a pair of plate materials are superimposed and prevent air from entering from the outer edge of the plate material. With the goal.
- the present invention consists of the following configurations. (1) A first plate member and a second plate member arranged to overlap each other in a plate thickness direction, and an intermediate layer provided between the first plate member and the second plate member, wherein the first plate member and the second plate member are arranged.
- Each of the first plate and the second plate is a plate having a curved surface portion having a convex main surface projecting in the plate thickness direction and a concave main surface opposite to the convex main surface, the concave main surface of the first plate and the convex main surface of the second plate are overlapped so as to face each other;
- first plate member and a second plate member arranged to overlap each other in a plate thickness direction; and an intermediate layer provided between the first plate member and the second plate member, wherein the first plate member and the second plate member A method for manufacturing a glass plate structure in which at least one of the second plate member is a glass plate, Each of the first plate member and the second plate member has a curved surface portion having a convex main surface protruding in a plate thickness direction and a concave main surface opposite to the convex main surface, and the first A plate in which the curvature radius of the concave side main surface of the plate material is smaller than the curvature radius of the convex side main surface of the second plate material, providing an intermediate layer liquid agent and a sealing agent on at least a portion of the concave main surface of the first plate; obtaining a laminate by bonding the convex-side main surface of the second plate material to the concave-side main surface provided with the intermediate layer liquid agent and the sealing agent; subjecting the laminate to a reduced
- the present invention it is possible to prevent air from entering from the outer edge of the plate material, and as a result, it is possible to reduce the shape error after bonding the pair of plate materials together.
- FIG. 1A is a schematic cross-sectional view of a glass plate structure.
- FIG. 1B is a schematic cross-sectional view of another glass plate structure.
- FIG. 2A is a process explanatory diagram showing an outline of the procedure for manufacturing a glass plate structure.
- FIG. 2B is a process explanatory diagram showing an outline of the procedure for manufacturing the glass plate structure.
- FIG. 2C is a process explanatory diagram showing an outline of the procedure for manufacturing the glass plate structure.
- FIG. 2D is a process explanatory drawing showing an outline of the procedure for manufacturing the glass plate structure.
- FIG. 3A is a reference diagram showing another example in which the first plate member and the second plate member are superimposed.
- FIG. 3A is a reference diagram showing another example in which the first plate member and the second plate member are superimposed.
- FIG. 3B is a reference diagram showing another example in which the first plate member and the second plate member are superimposed.
- FIG. 4 is a contour map showing the results of measurement of the distribution of gaps between the plate members when the first plate member and the second plate member shown in FIGS. 3A and 3B are pasted together.
- FIG. 5 is a contour map showing the results of measurement of the distribution of gaps between the plate members when the first plate member and the second plate member shown in FIG. 1 are pasted together.
- a glass plate structure according to the present invention includes a first plate member and a second plate member that overlap each other in a plate thickness direction, and an intermediate layer provided between the first plate member and the second plate member.
- the intermediate layer may contain a liquid layer, may be composed only of a liquid layer, or may be composed only of a solid phase.
- At least one of the first plate and the second plate is a glass plate.
- Each of the first plate member and the second plate member is a plate having a curved surface, and has a convex main surface projecting in the plate thickness direction and a concave main surface opposite to the convex main surface.
- the concave main surface of the first plate member and the convex main surface of the second plate member are overlapped so as to face each other, and the concave surface and the convex surface of each plate member are overlapped.
- the radius of curvature of the concave principal surface of the first plate is smaller than the radius of curvature of the convex principal surface of the second plate, so that the gap at the center of each plate is thicker than the gap at the outer edge of each plate.
- the first plate material and the second plate material are overlapped with a small gap at the outer edge thereof, and the stability of the overlapped plate materials can be improved and the shape error can be reduced.
- the thickness of the intermediate layer at the central portion of the plate surface is thicker than the thickness of the outer edge portion of the plate surface, and the gap between the plate materials at the outer edge portion of the plate material is small. Therefore, it becomes difficult for air to enter the intermediate layer from the outer edge of the plate material. Therefore, in the glass plate structure according to the present invention, air bubbles do not remain in the plate surface, and the film thickness unevenness of the liquid layer in the surface of each plate can be reduced.
- FIG. 1A is a schematic cross-sectional view of a glass plate structure.
- the glass plate structure 100 includes a first plate member 11, a second plate member 13, and an intermediate layer 15 provided between the first plate member 11 and the second plate member 13, which are arranged to overlap in the plate thickness direction. .
- the first plate member 11 and the second plate member 13 have the same shape in plan view. Therefore, the outer edge portions 17 of the overlapping first plate member 11 and the second plate member 13 are arranged at positions where they overlap each other. Note that the first plate member 11 and the second plate member 13 may have different shapes in plan view.
- Each of the first plate member 11 and the second plate member 13 has a constant plate thickness, and includes convex main surfaces 11a and 13a projecting in the plate thickness direction and concave main surfaces opposite to the convex main surfaces 11a and 13a. and surfaces 11b and 13b, respectively.
- the concave main surface 11b of the first plate member 11 and the convex main surface 13a of the second plate member 13 are overlapped so as to face each other. It is smaller than the curvature radius R2 of the convex main surface 13a of the plate member 13.
- the distance t in the plate thickness direction between the laminated first plate member 11 and the second plate member 13 widens from the outer edge portion 17 of the glass plate structure 100 toward the central portion.
- the “central portion” as used herein refers to a plan view (viewpoint from the normal direction of the plane) when the glass plate structure 100 is placed on a plane with the concave side main surface of the second plate member 13 facing each other. ) includes a portion (region) including the center of gravity of the glass plate structure 100 .
- the central portion may be, for example, a continuous region including the center of gravity and having an area of 30% inside the outer edge portion 17 when the area of the glass plate structure 100 in plan view is 100%.
- the central portion may be a 20% continuous area, a 10% continuous area, or a 5% continuous area under the above conditions.
- the glass plate structure 100 may have a structure in which the interval t in the plate thickness direction gradually increases from the outer edge 17 of the glass plate structure 100 in plan view toward the center, or may gradually increase toward the center of gravity.
- the gap between the plate members at the outer edge portion 17 of the first plate member 11 and the second plate member 13 is smaller than the gap at the center of the plate surface.
- the interval between the plate members at the outer edge portion 17 of the first plate member 11 and the second plate member 13 is preferably 0.5 mm or less, more preferably 0.4 mm or less, further preferably 0.3 mm or less, particularly preferably 0.3 mm or less over the entire circumference. 0.2 mm or less.
- a seal portion 19 for joining the first plate member 11 and the second plate member 13 to each other is provided at the outer edge portion of the first plate member 11 and the second plate member 13, and the intermediate layer 15 is an internal space surrounded by the seal portion 19. is sealed to
- FIG. 1B is a schematic cross-sectional view of another glass plate structure, and portions that are the same as those of the glass plate structure 100 shown in FIG. 1A are assigned the same numbers and descriptions thereof are omitted.
- the glass plate structure 101 shown in FIG. 1B has a first solid layer 31 between the first plate member 11 and the intermediate layer 15, and a second solid layer 33 between the second plate member 13 and the intermediate layer 15. have.
- the glass plate structure 101 may have either one of the first solid layer 31 and the second solid layer 33, or may have both.
- a solid layer may be provided between the glass plate and the intermediate layer 15 .
- the first solid layer 31 and the second solid layer 33 can be made of a resin material, a composite material, a fiber material, a metal material, or the like.
- resin materials include PMMA-based resins, PI-based resins, PC-based resins, PS-based resins, PET-based resins, cellulose-based resins, PVA resins, PVB resins, and the like.
- the first solid layer 31 and the second solid layer 33 preferably have transparency in the visible light region, and may have a constant thickness.
- the thickness of the first solid layer 31 and the second solid layer 33 is preferably thinner than that of the first plate member 11 and the second plate member 13.
- the thickness is 2 mm or less, preferably 1 mm or less, and 800 ⁇ m or less. It is more preferable to have
- the lower limit of the thickness of the first solid layer 31 and the second solid layer 33 is not particularly limited, it may be, for example, 100 nm or more.
- the glass plate structure 101 has at least one of the first solid layer 31 and the second solid layer 33, and thus has the effect of preventing scattering when the glass plate is broken.
- the first plate member 11 and the second plate member 13 are glass plates, the effect of penetration resistance when the glass plates are broken is easily obtained, which is preferable.
- the first solid layer 31 may be provided on the entire convex surface of the first plate member 11, or may be provided on a portion other than the outer edge portion 17 where the seal portion 19 is provided.
- the second solid layer 33 may be provided on the entire concave surface of the second plate member 13, or may be provided on a portion other than the outer edge portion 17 where the seal portion 19 is provided.
- FIG. 2A to 2D are process explanatory diagrams showing an outline of the procedure for manufacturing the glass plate structure 100.
- FIG. 2A In the glass plate structure 100 having the above configuration, first, as shown in FIG. 2A, the first plate member 11 is arranged so that the concave main surface 11b faces upward.
- the intermediate layer liquid agent 21 and the sealant 23 that will form the intermediate layer 15 are applied to the concave main surface 11b.
- the sealing agent 23 is applied to the outer edge portion 17 of the concave side main surface 11b
- the intermediate layer liquid agent 21 is applied to the plate surface inside the outer edge portion 17 of the concave side main surface 11b to which the sealing agent 23 is applied.
- the intermediate layer liquid agent 21 and the sealing agent 23 may be provided by other methods such as spray supply, transfer, etc., other than coating.
- the first solid layer 31 is laminated on the concave main surface 11b of the first plate member 11 in advance.
- 2A to 2D are carried out after preparing at least one of a plate member having a second solid layer 33 bonded onto the convex main surface 13a of the second plate member 13 and a plate member having the second solid layer 33 laminated thereon.
- the convex side main surface 13a of the second plate member 13 is arranged so as to face the concave side main surface 11b of the first plate member 11 to which the intermediate layer liquid agent 21 and the sealing agent 23 are applied. Then, the second plate member 13 is attached to the first plate member 11 . Then, by subjecting the bonded laminate to a reduced pressure, as shown in FIG. 2D, the space between the first plate member 11 and the second plate member 13 is filled with the intermediate layer liquid agent 21 and the sealing agent 23. A plate structure 100 is obtained.
- FIGS. 3A and 3B are reference diagrams showing other examples in which the first plate member and the second plate member are overlapped.
- the first plate member 11A and the second plate member 13A shown in FIGS. 3A and 3B have the above-described magnitude relationship of curvature radii reversed, and the curvature radius R1 of the concave main surface 11b of the first plate member 11A is the same as that of the second plate member 11A. larger than the radius of curvature R2 of the convex main surface 13a of 13A. In that case, as shown in FIG.
- the central portion of the convex side main surface 13a of the second plate member 13A is closest to the concave side main surface 11b of the first plate member 11A, and the gap ⁇ in the plate thickness direction at the outer edge portion 17 is spread.
- the relative positions of the first plate member 11A and the second plate member 13A are unstable, resulting in large manufacturing variations when manufacturing a large number of glass plate structures.
- FIG. 4 is a contour map showing the results of measurement of the distribution of gaps between the plate members when the first plate member 11A and the second plate member 13A shown in FIGS. 3A and 3B are pasted together.
- This gap is obtained by measuring the height distribution of the concave side main surface 11b of the first plate member 11A and measuring the height distribution of the convex side main surface 13a of the second plate member 13A. It can be calculated by finding the difference in height between corresponding positions. Height distribution can be measured by a fixed point measurement method using a contact sensor, a non-contact measurement method using a laser sensor, and a method by analyzing image data captured from various directions by multiple cameras. An appropriate one is used according to the conditions such as the object to be measured.
- the gap at the center of the plate surface is small, and the gap becomes larger as it approaches the outer edge of the plate surface. That is, peeling of the seal portion 19 is likely to occur at the outer edge of the plate surface, and air bubbles are likely to enter the intermediate layer.
- a gap generated in the outer edge portion 17 between the first plate member 11 and the second plate member 13 is filled with the applied intermediate layer 15 (intermediate layer liquid agent 21) and the sealing portion 19 (hereinafter also referred to as the coating liquid), and the plate members are filled with each other.
- the resulting deflection also reduces the gap. Furthermore, the sealing of the gap is maintained by the viscosity of the coating liquid and the viscous frictional resistance between the first plate member and the second plate member.
- the viscous frictional resistance of the coating liquid between the plate materials increases as the distance from the interface between the coating liquid and the plate material decreases according to Newton's law of viscosity.
- the viscous friction coefficient (apparent viscosity) increases exponentially when the gap is 100 ⁇ m or less, and when the gap is 10 ⁇ m, the apparent viscosity exceeds 30 times that of 100 ⁇ m. of viscosity.
- the gap between the first plate member 11 and the second plate member 13 in the outer edge portion 17 is at least 100 ⁇ m or less, preferably 50 ⁇ m or less, or more, regardless of the thickness of each plate member. It is assumed to be preferably 30 ⁇ m or less, more preferably 20 ⁇ m or less, even more preferably 15 ⁇ m or less, particularly preferably 10 ⁇ m or less. Therefore, the outer edge portion 17 after the air bubbles are discharged from the central portion is greatly affected by the viscous frictional resistance between the coating liquid and the plate material.
- the coating liquid a viscosity that can withstand the bending of the plate material, but in that case, the viscosity is effectively several tens of times higher than normal. Therefore, the gas cannot pass through the coating liquid (sealing portion) when the bubbles are discharged, and the bubbles cannot be discharged.
- the gap becomes smaller from the center of the plate toward the outer edge 17, and the frictional resistance of the coating liquid becomes maximum at the tip. Therefore, leakage of the coating liquid is prevented, and since the coating liquid is not crushed when the bubbles are discharged, the bubbles can be smoothly discharged through the coating liquid (seal portion 19).
- the plate thicknesses of the first plate member 11 and the second plate member 13 do not significantly affect the deflection (Young's modulus of the material) described above within the range of 1.8 mm to 3.0 mm.
- FIG. 5 is a contour map showing the result of measuring the distribution of the gaps between the plate members when the first plate member 11 and the second plate member 13 shown in FIG. 1 are pasted together.
- the method of measuring the gap is the same as in the case of FIG. In the case shown in FIG. 5, the gap is large at the central portion of the plate surface, and the gap becomes smaller toward the outer edge portion of the plate surface. Therefore, air bubbles are less likely to enter the intermediate layer from the outer edge of the plate surface.
- the intermediate layer 15 contains a liquid layer
- the presence of the liquid layer prevents a pair of plate materials from being bonded together via an adhesive layer.
- the surfaces of the plate member 11 and the second plate member 13 do not adhere to each other, and the vibration characteristics of each plate member can be maintained.
- the existence of the intermediate layer (liquid layer) 15 prevents the second plate member 13 from resonating or dampens the vibration of the resonance of the second plate member 13, so that the glass plate structure 100 has a higher loss factor than a single plate.
- the values of the peak tops of the resonance frequencies of one plate member and the other plate member are different, and it is more preferable that the resonance frequency ranges do not overlap.
- the existence of the intermediate layer (liquid layer) 15 may cause Even if one resonates, the vibration of the other plate does not synchronize, so the resonance is canceled to some extent, and a higher loss factor is obtained than in the case of one plate.
- the mass ratio of the first plate 11 and the second plate 13 is 0.8 to 1.25 (8/10 to 10/8). It is preferably 0.9 to 1.1 (9/10 to 10/9), more preferably 1.0 (10/10).
- the thickness of each of the plate members 11 and 13 is preferably 15 mm or less, more preferably 10 mm or less, even more preferably 5 mm or less, even more preferably 3 mm or less, particularly preferably 1.5 mm or less, and 0.8 mm. The following are particularly preferred. On the other hand, if it is too thin, the influence of the surface defects of the plate material tends to be noticeable, cracking is likely to occur, and strengthening treatment becomes difficult. , more preferably 0.05 mm or more.
- the plate thickness of the first plate member 11 and the second plate member 13 is preferably 0.5 mm to 15 mm, and 0.8 mm. ⁇ 10 mm is more preferred, and 1.0 mm to 8 mm is even more preferred.
- the thickness of each of the first plate member 11 and the second plate member 13 is preferably 0.3 mm to 1.2 mm, more preferably 0.4 mm to 1.0 mm.
- 0.5 mm to 0.8 mm is more preferable.
- At least one of the first plate member 11 and the second plate member 13 has a larger loss factor, which is preferable for use as a diaphragm because vibration damping as a glass plate structure becomes larger.
- the loss factor of the plate material at 25° C. is preferably 1 ⁇ 10 ⁇ 4 or more, more preferably 3 ⁇ 10 ⁇ 4 or more, and even more preferably 5 ⁇ 10 ⁇ 4 or more.
- the upper limit of the loss factor is not particularly limited, it is preferably 5 ⁇ 10 ⁇ 3 or less from the viewpoint of productivity and manufacturing cost.
- both the first plate member 11 and the second plate member 13 have the loss factor described above.
- At least one of the first plate member 11 and the second plate member 13 has a higher longitudinal wave sound velocity value in the plate thickness direction, which is preferable for use as a diaphragm because the reproducibility of sound in a high frequency region is improved.
- the longitudinal wave sound velocity value of the plate material is preferably 5.5 ⁇ 10 3 m/s or more, more preferably 5.7 ⁇ 10 3 m/s or more, and 6.0 ⁇ 10 3 m/s or more. is more preferred.
- the upper limit is not particularly limited, it is preferably 7.0 ⁇ 10 3 m/s or less from the viewpoint of the productivity of the plate material and raw material costs.
- both the first plate member 11 and the second plate member satisfy the above sound velocity value.
- the glass plate structure 100 having the above configuration at least one of the plate members of the first plate member 11 and the second plate member 13 is made of a glass plate.
- the glass plate here means inorganic glass and organic glass.
- organic glass include PMMA-based resins, PC-based resins, PS-based resins, PET-based resins, cellulose-based resins, and the like, which are generally well known as transparent resins.
- any material can be used for the other plate material, and various materials such as a resin plate made of resin other than organic glass, a metal plate such as aluminum, and a ceramic plate made of ceramic can be used. From the viewpoint of designability, workability, and weight, it is preferable to use organic glass, resin materials, composite materials, fiber materials, and metal materials. It is preferred to use a material, metallic material or ceramic material.
- the resin material it is preferable to use a resin material that can be molded into a flat plate shape or a curved plate shape.
- the composite material or fiber material it is preferable to use a resin material, carbon fiber, Kevlar fiber, or the like compounded with a high-hardness filler.
- the metal material aluminum, magnesium, copper, silver, gold, iron, titanium, stainless steel (SUS) and the like are preferable, and other alloy materials and the like may be used as necessary. Ceramic materials such as Al 2 O 3 , SiC, Si 3 N 4 , AlN, mullite, zirconia, yttria, YAG, and single crystal materials are more preferable as ceramic materials.
- a material having translucency is particularly preferable.
- the composition is not particularly limited, but the following range, for example, is preferable in terms of mass % based on oxides.
- SiO 2 40 to 80% by mass, Al 2 O 3 : 0 to 35% by mass, B 2 O 3 : 0 to 15% by mass, MgO: 0 to 20% by mass, CaO: 0 to 20% by mass, SrO: 0 ⁇ 20% by mass, BaO: 0 to 20% by mass, Li 2 O: 0 to 20% by mass, Na 2 O: 0 to 25% by mass, K 2 O: 0 to 20% by mass, TiO 2 : 0 to 10% by mass %, and ZrO 2 : 0 to 10% by mass.
- the above composition accounts for 95% by mass or more of the entire glass.
- the composition of the inorganic glass plate is more preferably within the following range. SiO 2 : 55 to 75% by mass, Al 2 O 3 : 0 to 25% by mass, B 2 O 3 : 0 to 12% by mass, MgO: 0 to 20% by mass, CaO: 0 to 20% by mass, SrO: 0 ⁇ 20% by mass, BaO: 0 to 20% by mass, Li 2 O: 0 to 20% by mass, Na 2 O: 0 to 25% by mass, K 2 O: 0 to 15% by mass, TiO 2 : 0 to 5% by mass %, and ZrO 2 : 0 to 5% by mass.
- the above composition accounts for 95% by mass or more of the entire glass.
- the specific gravities of the first plate member 11 and the second plate member 13 are preferably 2.8 or less, more preferably 2.6 or less, and even more preferably 2.5 or less.
- the lower limit is not particularly limited, it is preferably 2.2 or more.
- the specific elastic modulus which is the value obtained by dividing the Young's modulus of the first plate member 11 and the second plate member 13 by the density, the higher the rigidity of the plate members.
- the specific elastic moduli of the first plate member 11 and the second plate member 13 are preferably 2.5 ⁇ 10 7 m 2 /s 2 or more, and more preferably 2.8 ⁇ 10 7 m 2 /s 2 or more. Preferably, 3.0 ⁇ 10 7 m 2 /s 2 or more is even more preferable.
- the upper limit is not particularly limited, it is preferably 4.0 ⁇ 10 7 m 2 /s 2 or less.
- the curved surface shape of the first plate member 11 and the second plate member 13 may be a single curved surface, or may have a plurality of curved surfaces having a plurality of types of curvature radii. That is, the glass plate structure 100 may have a compound curved shape curved in both the first direction and the second intersecting direction in plan view, or may have a single curved shape curved only in the first direction or only in the second direction. It may be curved.
- first plate member 11 and the second plate member 13 may have a compound curved shape and the other may have a single curved shape, and the radius of curvature of the concave main surface of the first plate member 11 may be the second It is sufficient if the relationship is smaller than the radius of curvature of the convex-side main surface of the plate member 13 .
- first direction and the second direction may be directions orthogonal to each other in plan view of the glass plate structure 100 .
- the intermediate layer liquid agent 21 and the sealing agent 23 are applied to at least part of the main surface (concave main surface 11b) of one of the pair of plate members (for example, the first plate member 11).
- the intermediate layer liquid agent (hereinafter also simply referred to as liquid agent) 21 is a material that constitutes the intermediate layer 15 of the glass plate structure 100 .
- the liquid agent 21 preferably has a viscosity coefficient of 1 ⁇ 10 3 Pa ⁇ s or less at 25°C. Also, the viscosity coefficient at 25° C. is preferably 1 ⁇ 10 ⁇ 4 Pa ⁇ s or more.
- a viscosity coefficient of 1 ⁇ 10 ⁇ 3 Pa ⁇ s or more is more preferable, and 1 ⁇ 10 ⁇ 2 Pa ⁇ s or more is even more preferable. Moreover, it is more preferably 1 ⁇ 10 2 Pa ⁇ s or less, and even more preferably 1 ⁇ 10 Pa ⁇ s or less. This viscosity coefficient can be measured with a rotational viscometer or the like.
- the liquid agent 21 preferably has a surface tension of 15 N/m to 80 mN/m at 25°C. If the surface tension is too low, the adhesion between the plate materials will decrease, making it difficult to transmit vibration. If the surface tension is too high, the pair of plate members positioned on both sides of the intermediate layer (liquid layer) are likely to adhere to each other, exhibiting vibration behavior as a single plate member, making it difficult to attenuate resonance vibration.
- the surface tension is more preferably 20 mN/m or higher, and even more preferably 30 mN/m or higher. This surface tension can be measured by a ring method or the like.
- the intermediate layer liquid agent 21 preferably has a vapor pressure of 1 ⁇ 10 4 Pa or less at 25° C. and 1 atm, more preferably 5 ⁇ 10 3 Pa or less, and even more preferably 1 ⁇ 10 3 Pa or less.
- the intermediate layer (liquid layer) 15 is chemically stable, and it is preferable that the intermediate layer (liquid layer) 15 and the first plate member 11 and the second plate member 13 do not react.
- the term "chemically stable” refers to, for example, those that undergo little alteration (degradation) due to light irradiation, or those that do not solidify, vaporize, decompose, discolor, or chemically react with glass in a temperature range of at least -20°C to 70°C. means.
- the intermediate layer liquid agent 21 include water, oil, organic solvents, liquid polymers, ionic liquids, mixtures thereof, and the like. More specifically, propylene glycol, dipropylene glycol, tripropylene glycol, straight silicone oil (dimethyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil), modified silicone oil, acrylic acid polymer, liquid polybutadiene, glycerin Paste, fluorinated solvent, fluorinated resin, acetone, ethanol, xylene, toluene, water, mineral oil, mixtures thereof, and the like.
- the intermediate layer (liquid layer) 15 easily dissolves air, which is preferable because the formation of air bubbles can be suppressed.
- the intermediate layer liquid agent 21 may be a slurry in which powder is dispersed, or may contain a fluorescent material. good.
- the powder content in the intermediate layer liquid agent 21 is preferably 0% to 10% by volume, more preferably 0% to 5% by volume.
- the particle size of the powder is preferably 10 nm to 1 ⁇ m, more preferably 10 nm to 0.5 ⁇ m or less, from the viewpoint of preventing sedimentation.
- the sealing agent 23 is applied to prevent leakage of the liquid agent and to prevent peeling at the interface between the plate of the glass plate structure and the liquid layer.
- the sealant 23 is required not to run off when applied to the plate materials, and to have strength to withstand the weight of the plate materials when the plate materials are bonded together.
- the viscosity coefficient at 25° C. is preferably 1 ⁇ 10 ⁇ 1 Pa ⁇ s or more, more preferably 1 Pa ⁇ s or more.
- the viscosity coefficient at 25 ° C. is preferably 1 ⁇ 10 3 Pa s or less, more preferably 1 ⁇ 10. 2 Pa ⁇ s or less.
- the viscosity coefficient of the sealing agent 23 is preferably higher than that of the liquid agent 21 .
- sealant 23 examples include highly elastic rubber, resin, gel, and the like. Acrylic, cyanoacrylate, epoxy, silicone, urethane, phenol, and the like can be used as sealant resins. Curing methods include one-liquid type, two-liquid mixed type, heat curing, ultraviolet curing, visible light curing, and the like. A thermoplastic resin (hot melt bond) can also be used as the sealing agent 23 . Examples include ethylene vinyl acetate, polyolefin, polyamide, synthetic rubber, acrylic, and polyurethane.
- rubber for example, natural rubber, synthetic natural rubber, butadiene rubber, styrene-butadiene rubber, butyl rubber, nitrile rubber, ethylene-propylene rubber, chloroprene rubber, acrylic rubber, chlorosulfonated polyethylene rubber (Hypalon), urethane rubber, silicone rubber , fluororubber, ethylene-vinyl acetate rubber, epichlorohydrin rubber, polysulfide rubber (thiocol), and hydrogenated nitrile rubber.
- natural rubber synthetic natural rubber, butadiene rubber, styrene-butadiene rubber, butyl rubber, nitrile rubber, ethylene-propylene rubber, chloroprene rubber, acrylic rubber, chlorosulfonated polyethylene rubber (Hypalon), urethane rubber, silicone rubber , fluororubber, ethylene-vinyl acetate rubber, epichlorohydrin rubber, polysulfide rubber (thiocol), and hydrogenated nit
- the order of applying the liquid agent 21 and the sealing agent 23 does not matter.
- the liquid agent 21 may be applied to the portion where the intermediate layer is to be formed, and the sealing agent 23 may be applied so as to surround the outer periphery.
- the sealing agent 23 may be applied to the concave main surface 11b, and the liquid agent 21 may be applied to the inner periphery thereof.
- the application pattern of the liquid agent 21 is not particularly limited, and it may be applied in layers, dots, grids, or stripes. Among them, a dot shape is preferable from the viewpoint of easily securing a flow path through which air bubbles can escape.
- the coating thickness of the liquid agent 21 may be appropriately set so that the thickness of the intermediate layer 15 falls within a desired range, preferably 5 ⁇ m to 500 ⁇ m.
- the sealing agent 23 is preferably applied so as to surround the outer circumference of the liquid agent 21 .
- the area of the sealing agent-applied portion is preferably 20% or less, more preferably 10% or less, and particularly preferably 5% or less of the area of the liquid agent-applied portion so as not to interfere with vibration.
- the coating thickness of the sealing agent 23 is preferably greater than the coating thickness of the liquid agent 21, preferably 10 ⁇ m to 1000 ⁇ m, from the viewpoint of easily securing a flow path for air bubbles to escape.
- liquid agent 21 and the sealing agent 23 As a method for applying the liquid agent 21 and the sealing agent 23, known techniques such as screen printing and dispenser can be used.
- the second plate member 13 is attached to the recessed main surface 11b of the first plate member 11 to which the intermediate layer liquid agent 21 and the sealant 23 are applied to obtain a laminate.
- the lamination is preferably performed under normal pressure. In the vacuum lamination method, it is difficult to hold two plate materials with high positional accuracy in a decompressed state, and it is difficult to laminate without positional deviation. However, by laminating under normal pressure, the two plate materials can be laminated with good positional accuracy. It should be noted that the laminated body is susceptible to deformation of the plate material, and the softening of the sealant 23 by heat makes it difficult to secure a flow path for air bubbles to escape, making it difficult to defoam. No heating is preferred.
- the laminate obtained as described above is subjected to reduced pressure.
- the laminate is subjected to an atmosphere of preferably 100 Pa or less, more preferably 50 Pa or less.
- the time for which it is provided depends on the defoaming rate, but is preferably 1 minute to 180 minutes.
- the time required to reach a pressure of 100 Pa or less is preferably within 30 minutes, more preferably within 15 minutes, and particularly preferably within 15 minutes. Done within 10 minutes.
- Examples of the method of subjecting the laminate to a reduced pressure include a method of using a reduced pressure chamber, and a method of putting the laminate in a bag made of rubber or the like and degassing the inside of the bag.
- the spatial volume (L) in the decompression chamber/the exhaust capacity (L/min) in the decompression chamber is preferably 1.8 or less, more preferably 1.5 or less, and 0.5. 9 or less is more preferable.
- pressurize the laminate After being subjected to reduced pressure. As a result, it is possible to push out the air that could not be removed only by reducing the pressure from the intermediate layer (liquid layer) 15 .
- Examples of the pressurization method include a method in which the laminate is temporarily pressure-bonded using rolls and pressure-bonded using an autoclave.
- the pressure inside the autoclave is preferably 0.1 MPa to 10 MPa, and the crimping time is preferably 1 minute to 30 minutes.
- the sealant 23 may be cured as necessary. Thereby, leakage of the intermediate layer (liquid layer) 15 can be reliably prevented.
- the curing means can be appropriately selected according to the material of the sealant 23 . If the sealant 23 is a photocurable resin, it may be cured by irradiation with light such as ultraviolet rays, and if it is a thermosetting resin, it may be cured by heating.
- the intermediate layer (liquid layer) 15 obtained by the intermediate layer liquid agent 21 may be cured as necessary, and curing after defoaming is preferable because the intermediate layer 15 made of a solid phase has no residual air. .
- the curing means for the intermediate layer 15 can be appropriately selected according to the material of the sealant 23 .
- the intermediate layer liquid agent may be the same material as the sealing agent. If the sealant 23 is a photocurable resin, it may be cured by light irradiation such as ultraviolet rays, and if it is a thermosetting resin, it may be cured by heating. Also, the sealing agent 23 may be a moisture-condensation type resin.
- the thickness of the intermediate layer 15 is preferably as thin as possible in terms of maintaining high rigidity and transmitting vibration. From this point of view, when the total thickness of the pair of plate materials is 1 mm or less, the thickness of the intermediate layer 15 is preferably 1/10 or less, more preferably 1/20 or less, of the total thickness of the pair of plate materials. It is more preferably 1/30 or less, still more preferably 1/50 or less, even more preferably 1/70 or less, and particularly preferably 1/100 or less.
- the thickness of the intermediate layer 15 is preferably 100 ⁇ m or less, more preferably 50 ⁇ m or less, even more preferably 30 ⁇ m or less, and even more preferably 20 ⁇ m or less. It is preferably 15 ⁇ m or less, particularly preferably 10 ⁇ m or less.
- the lower limit of the thickness of the intermediate layer 15 is preferably 0.01 ⁇ m or more from the viewpoint of film formability and durability.
- the thickness of the sealant within a region of 1/3 from the outer edge toward the center of the glass plate structure in the longitudinal direction of the glass plate structure is 0.5 mm. It is preferable to: In this way, by forming a belt-shaped seal portion in which the thickness of the sealant is 0.5 mm or less, it is possible to reliably prevent air from flowing into the intermediate layer (liquid layer).
- the present invention is not limited to the above-described embodiments, and those skilled in the art can make modifications and applications by combining each configuration of the embodiments with each other, based on the description of the specification and well-known techniques. It is also contemplated by the present invention that it falls within the scope of protection sought.
- the above-described glass plate structure has a structure in which a pair of plate materials are bonded together with an intermediate layer interposed therebetween, but the number of plate materials is arbitrary, and at least one plate material is sandwiched with the intermediate layer or directly They may be pasted together.
- the glass plate structure when the glass plate structure is provided in a vehicle, its application locations include, for example, front side windows, rear side windows, front windows (windshields), rear windows, roof glazing, etc. of automobiles. In addition to automobiles, it can also be applied to railway vehicles, etc.
- speakers, microphones, earphones, diaphragms used in mobile devices aircraft windows, ship windows, windows of buildings such as houses ( (opening members for buildings), glass substrates for magnetic recording media, and the like.
- a first plate member and a second plate member arranged to overlap each other in a plate thickness direction, and an intermediate layer provided between the first plate member and the second plate member, wherein the first plate member and the second plate member are arranged.
- Each of the first plate and the second plate is a plate having a curved surface portion having a convex main surface projecting in the plate thickness direction and a concave main surface opposite to the convex main surface, the concave main surface of the first plate and the convex main surface of the second plate are overlapped so as to face each other;
- the concave main surface of the first plate having a small radius of curvature and the convex main surface of the second plate having a large radius of curvature overlap to separate the first plate and the second plate. They can be combined with high accuracy, and the gap at the outer edge is reduced. Therefore, the intermediate layer can be stably sandwiched between the first plate member and the second plate member.
- the glass plate structure according to (4) which has a solid layer between at least one of the first plate and the liquid layer and between the second plate and the liquid layer. According to this glass plate structure, when the glass plate is broken, the glass plate is less likely to scatter.
- a sealing portion for joining the first plate member and the second plate member to each other is provided at an outer edge portion of the first plate member and the second plate member;
- the glass plate structure according to any one of (4) to (7), wherein the liquid layer is sealed in an inner space surrounded by the seal portion. According to this glass plate structure, air can be prevented from entering the liquid layer by sealing the liquid layer with the sealing portion.
- the seal portion has a viscosity coefficient of 1 ⁇ 10 ⁇ 1 Pa ⁇ s or more, and the liquid layer has a viscosity coefficient of 1 ⁇ 10 3 s or less.
- Glass plate structure According to this glass plate structure, a strength that can withstand the weight of the plate members can be obtained when the plate members are laminated together.
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Abstract
Description
(1) 板厚方向に互いに重なって配置された第1板材及び第2板材と、前記第1板材と前記第2板材との間に設けられた中間層とを備え、前記第1板材と前記第2板材のうち少なくとも一方がガラス板であるガラス板構成体であって、
前記第1板材及び前記第2板材のそれぞれは、板厚方向に突出する凸側主面と、前記凸側主面の反対側の凹側主面とを有する曲面部を有する板であり、
前記第1板材の前記凹側主面と、前記第2板材の前記凸側主面とは、互いに対向して重ね合わされ、
前記第1板材の前記凹側主面の曲率半径は、前記第2板材の前記凸側主面の曲率半径よりも小さい、ガラス板構成体。
(2) 板厚方向に互いに重なって配置された第1板材及び第2板材と、前記第1板材と前記第2板材との間に設けられた中間層とを備え、前記第1板材と前記第2板材とのうち少なくとも一方がガラス板であるガラス板構成体の製造方法であって、
前記第1板材及び前記第2板材のそれぞれは、板厚方向に突出する凸側主面と、前記凸側主面の反対側の凹側主面とを有する曲面部を有し、前記第1板材の前記凹側主面の曲率半径は、前記第2板材の前記凸側主面の曲率半径よりも小さい板であり、
前記第1板材の前記凹側主面の少なくとも一部に中間層用液剤及びシール剤を設けることと、
前記中間層用液剤及びシール剤を設けた前記凹側主面に、前記第2板材の前記凸側主面を貼り合わせて積層体を得ることと、
前記積層体を減圧下に供することと、
を含む、ガラス板構成体の製造方法。
本発明に係るガラス板構成体は、板厚方向に互いに重なって配置された第1板材及び第2板材と、第1板材と第2板材との間に設けられた中間層とを備える。中間層は、液体層を含んでもよく、液体層のみで構成されてもよく、固相のみで構成されてもよい。第1板材と第2板材のうち少なくとも一方はガラス板である。第1板材及び第2板材のそれぞれは、曲面を有する板であり、板厚方向に突出する凸側主面と、凸側主面の反対側の凹側主面とを有する。第1板材の凹側主面と第2板材の凸側主面とは、互いに対向して重ね合わされて、各板材の凹面と凸面とが重なり合っている。第1板材の凹側主面の曲率半径は、第2板材の凸側主面の曲率半径より小さく、これにより、各板材の外縁部の隙間よりも中央部の隙間が厚くなっている。
図1Aは、ガラス板構成体の模式的な断面図である。
ガラス板構成体100は、板厚方向に重なって配置された第1板材11と、第2板材13と、第1板材11と第2板材13との間に設けられた中間層15とを備える。第1板材11と第2板材13とは、平面視で互いに同一の形状を有している。したがって、重なり合った第1板材11と第2板材13との外縁部17同士は、互いに重なり合う位置に配置される。なお、第1板材11と第2板材13とは、平面視で異なる形状を有してもよい。
上記構成のガラス板構成体100は、まず、図2Aに示すように、第1板材11を凹側主面11bが上向きになるように配置する。この凹側主面11bに、図2Bに示すように、中間層15となる中間層用液剤21及びシール剤23を塗布する。ここで、シール剤23は、凹側主面11bの外縁部17に塗布され、中間層用液剤21は、シール剤23が塗布された凹側主面11bの外縁部17よりも内側の板面に塗布される。中間層用液剤21とシール剤23とは、塗布以外にも、噴射供給、転写等の他の手法で設けてもよい。
なお、第1固体層31及び第2固体層33の少なくとも一方を有するガラス板構成体101を製造する場合、予め第1板材11の凹側主面11b上に第1固体層31が貼合された板材と、第2板材13の凸側主面13a上に第2固体層33が貼合された板材、の少なくとも一方を準備したうえで図2A~図2Dの工程を実施すればよい。
図3A,図3Bに示す第1板材11Aと第2板材13Aは、前述した曲率半径の大小関係が逆転しており、第1板材11Aの凹側主面11bの曲率半径R1は、第2板材13Aの凸側主面13aの曲率半径R2より大きい。その場合、図3Aに示すように、第2板材13Aの凸側主面13aの中央部が第1板材11Aの凹側主面11bに最も接近し、外縁部17において板厚方向の隙間δが広がる。この状態では、第1板材11Aと第2板材13Aとの相対位置が不安定であり、多数枚のガラス板構成体を製造する際に、製造バラつきが大きくなる。
このように、曲率半径が逆の組み合わせでは、外縁部17における隙間の密閉を確保することは極めて困難であり、外観が良好なガラス板構成体を得ることは難しい。
(wa+wb)/4<|Qa-Qb|・・・[式1]
[式1]における左辺の値が大きくなるほど、板材同士の共振周波数の差異(|Qa-Qb|)が大きくなり、高い損失係数が得られるため好ましい。
(wa+wb)/2<|Qa-Qb|・・・[式2]
(wa+wb)/1<|Qa-Qb|・・・[式3]
なお、板の共振周波数(ピークトップ)及び共振振幅の半値幅は、ガラス板構成体における損失係数と同様の方法で測定できる。
防振効果を高めた磁気記録媒体用ガラス基板用途においては、第1板材11、第2板材13の板厚は、それぞれ0.3mm~1.2mmが好ましく、0.4mm~1.0mmがより好ましく、0.5mm~0.8mmがさらに好ましい。
セラミック材料としては、例えばAl2O3、SiC、Si3N4、AlN、ムライト、ジルコニア、イットリア、YAG等のセラミックス及び単結晶材料がより好ましい。また、セラミック材料については透光性を有する材料が特に好ましい。
SiO2:40~80質量%、Al2O3:0~35質量%、B2O3:0~15質量%、MgO:0~20質量%、CaO:0~20質量%、SrO:0~20質量%、BaO:0~20質量%、Li2O:0~20質量%、Na2O:0~25質量%、K2O:0~20質量%、TiO2:0~10質量%、かつ、ZrO2:0~10質量%。但し上記組成がガラス全体の95質量%以上を占める。
SiO2:55~75質量%、Al2O3:0~25質量%、B2O3:0~12質量%、MgO:0~20質量%、CaO:0~20質量%、SrO:0~20質量%、BaO:0~20質量%、Li2O:0~20質量%、Na2O:0~25質量%、K2O:0~15質量%、TiO2:0~5質量%、かつ、ZrO2:0~5質量%。但し上記組成がガラス全体の95質量%以上を占める。
本構成のガラス板構成体100では、一対の板材のうち一方の板材(例えば第1板材11)の主面(凹側主面11b)の少なくとも一部に中間層用液剤21及びシール剤23を塗布する。
中間層用液剤(以下、単に液剤ともいう。)21は、ガラス板構成体100の中間層15を構成する材料である。
液剤21は、ガラス板構成体100の高い損失係数を実現する観点から、25℃における粘性係数は、1×103Pa・s以下が好ましい。また、25℃における粘性係数は、1×10-4Pa・s以上が好ましい。粘性が低すぎると振動を伝達しにくくなり、高すぎると中間層15の両側に位置する一対の板材同士が固着して一枚の板材としての振動挙動を示すようになることから、共振振動が減衰されにくくなる。粘性係数は1×10-3Pa・s以上がより好ましく、1×10-2Pa・s以上がさらに好ましい。また、1×102Pa・s以下がより好ましく、1×10Pa・s以下がさらに好ましい。この粘性係数は、回転粘度計などにより測定できる。
より具体的には、プロピレングリコール、ジプロピレングリコール、トリプロピレングリコール、ストレートシリコーンオイル(ジメチルシリコーンオイル、メチルフェニルシリコーンオイル、メチルハイドロジェンシリコーンオイル)、変性シリコーンオイル、アクリル酸系ポリマー、液状ポリブタジエン、グリセリンペースト、フッ素系溶剤、フッ素系樹脂、アセトン、エタノール、キシレン、トルエン、水、鉱物油、及びそれらの混合物、等が挙げられる。中でも、プロピレングリコール、ジメチルシリコーンオイル、メチルフェニルシリコーンオイル、メチルハイドロジェンシリコーンオイル及び変性シリコーンオイルからなる群より選ばれる少なくとも1種を含むことが好ましく、プロピレングリコール又はシリコーンオイルを主成分とすることがより好ましい。また、シリコーンオイルを主成分とすることで、中間層(液体層)15が空気を溶解しやすいため、気泡の形成を抑制でき好ましい。
中間層用液剤21における粉体の含有量は、0体積%~10体積%が好ましく、0体積%~5体積%がより好ましい。粉体の粒径は、沈降を防ぐ観点から10nm~1μmが好ましく、10nm~0.5μm以下がより好ましい。
シール剤用の樹脂に関しては、アクリル系、シアノアクリレート系、エポキシ系、シリコーン系、ウレタン系、フェノール系等を用いることができる。硬化方法としては一液型、二液混合型、加熱硬化、紫外線硬化、可視光硬化等が挙げられる。
シール剤23としては、熱可塑性樹脂(ホットメルトボンド)も使用できる。例として、エチレン酢酸ビニル系、ポリオレフィン系、ポリアミド系、合成ゴム系、アクリル系、ポリウレタン系が挙げられる。
ゴムに関しては、例えば天然ゴム、合成天然ゴム、ブタジエンゴム、スチレン・ブタジエンゴム、ブチルゴム、ニトリルゴム、エチレン・プロピレンゴム、クロロプレンゴム、アクリルゴム、クロロスルホン化ポリエチレンゴム(ハイパロン)、ウレタンゴム、シリコーンゴム、フッ素ゴム、エチレン・酢酸ビニルゴム、エピクロルヒドリンゴム、多硫化ゴム(チオコール)、水素化ニトリルゴムを使用できる。
第1板材11の中間層用液剤21及びシール剤23が塗布された凹側主面11b側に、第2板材13を貼合して積層体を得る。
貼合は、常圧下で行うことが好ましい。減圧貼合法においては、減圧した状態で2枚の板材を位置精度良く保持することは難しく、位置ずれなく積層することは困難である。しかし、常圧下で貼合することで、2枚の板材を良好な位置精度で積層できる。
なお、積層体は、板材が変形しやすいこと、また、シール剤23が熱により軟化することによって気泡の抜ける流路が確保されにくく、脱泡しにくいため、貼合による積層体を得る過程において加熱しないことが好ましい。
上記のように得られた積層体は、減圧下に供される。これにより、液剤21の塗布時や板材の貼合時に中間層(液体層)15中に気泡が存在しても、徐々に板材の外縁部に気泡が移動し、積層体の外へ放出される。
具体的には、積層体は、好ましくは100Pa以下、より好ましくは50Pa以下の雰囲気に供される。また、供される時間は脱泡速度にもよるが、好ましくは1分~180分である。
また、急速に減圧することで気泡が効率的に放出される観点から、減圧は、100Pa以下の圧力に到達するまでに要する時間を好ましくは30分以内、より好ましくは15分以内、特に好ましくは10分以内で行う。
なお、積層体を減圧下に供する方法としては、減圧チャンバーを用いる方法や、積層体をゴム製等のバッグに入れ、バッグ内を脱気する方法等が挙げられる。
このとき、急速に減圧できる観点から、減圧チャンバー内の空間体積(L)/減圧チャンバー内の排気能力(L/min)は、1.8以下が好ましく、1.5以下がより好ましく、0.9以下がさらに好ましい。
減圧下に供した後の積層体は、加圧することが好ましい。これにより減圧だけで抜けきれなかった空気を中間層(液体層)15から押し出すことができる。加圧方法としては、積層体を、ロールを用いて仮圧着し、オートクレーブを用いて圧着する方法が挙げられる。オートクレーブ内の圧力は、好ましくは0.1MPa~10MPa、圧着時間は好ましくは1分~30分である。
シール剤23は、必要に応じて硬化させてもよい。これにより中間層(液体層)15の漏洩を確実に防ぐことができる。
硬化手段は、シール剤23の材料に応じて適宜選択できる。シール剤23が光硬化性樹脂であれば、紫外線などの光照射によって硬化させてもよく、熱硬化性樹脂であれば加熱によって硬化させてもよい。
中間層用液剤21によって得られた中間層(液体層)15は、必要に応じて硬化させてもよく、とくに脱泡後に硬化させると、固相からなる中間層15に空気残りが無くなるので好ましい。
中間層15の硬化手段はシール剤23の材料に応じて適宜選択できる。また、中間層用液剤は、シール剤と同じ材料でもよい。シール剤23が光硬化性樹脂であれば、紫外線などの光照射によって硬化させ、熱硬化性樹脂であれば加熱によって硬化させてもよい。また、シール剤23は、湿気による縮合タイプの樹脂でもよい。
中間層15の厚さは薄いほど、高剛性の維持及び振動伝達の点から好ましい。かかる観点から、一対の板材の合計の厚みが1mm以下の場合は、中間層15の厚さは、一対の板材の合計の厚さの好ましくは1/10以下、より好ましくは1/20以下、さらに好ましくは1/30以下、よりさらに好ましくは1/50以下、ことさら好ましくは1/70以下、特に好ましくは1/100以下である。
(1) 板厚方向に互いに重なって配置された第1板材及び第2板材と、前記第1板材と前記第2板材との間に設けられた中間層とを備え、前記第1板材と前記第2板材のうち少なくとも一方がガラス板であるガラス板構成体であって、
前記第1板材及び前記第2板材のそれぞれは、板厚方向に突出する凸側主面と、前記凸側主面の反対側の凹側主面とを有する曲面部を有する板であり、
前記第1板材の前記凹側主面と、前記第2板材の前記凸側主面とは、互いに対向して重ね合わされ、
前記第1板材の前記凹側主面の曲率半径は、前記第2板材の前記凸側主面の曲率半径よりも小さい、ガラス板構成体。
このガラス板構成体によれば、曲率半径が小さい第1板材の凹側主面と、曲率半径が大きい第2板材の凸側主面とが重なり合うことで、第1板材と第2板材とを精度良く組み合わせることができ、しかも、外縁部の隙間が小さくなる。よって、中間層を第1板材と第2板材との間に安定して挟み込むことができる。
このガラス板構成体によれば、第1板材と第2板材の板厚方向の間隔が、外縁部で最小となり、中間層を封止しやすくなる。
このガラス板構成体によれば、第1板材と第2板材との間に配置される中間層が安定して挟み込まれる。
このガラス板構成体によれば、良好な音響特性を発揮しやすくなる。
このガラス板構成体によれば、ガラス板が割れたときに、ガラス板が飛散しにくくなる。
このガラス板構成体によれば、可視光領域における透明性を維持しやすくなる。
このガラス板構成体によれば、ガラス板が割れたときに、ガラス板が飛散しにくくなる。
前記液体層は、前記シール部に囲まれた内側空間に封止されている、(4)~(7)のいずれかに記載のガラス板構成体。
このガラス板構成体によれば、液体層をシール部で封止することで、液体層への空気の入り込みを防止できる。
このガラス板構成体によれば、液体層から気泡を効率的に除くことができる。
このガラス板構成体によれば、板材同士の貼合せ時に、板材の重量に耐えられる強度が得られる。
このガラス板構成体によれば、シリコーンを含むことで液体層が空気を溶解しやすくなり、気泡の形成を抑制できる。
このガラス板構成体によれば、第1板材と第2板材の外縁部が重なり合って、板材間の隙間を小さくできる。
このガラス板構成体によれば、空気が中間層に入り込むことを確実に防止できる。
このガラス板構成体によれば、振動特性をより向上できる。
このガラス板構成体によれば、共振振動が減衰されて、良好な振動伝達特性が得られる。
前記第1板材及び前記第2板材のそれぞれは、板厚方向に突出する凸側主面と、前記凸側主面の反対側の凹側主面とを有する曲面部を有し、前記第1板材の前記凹側主面の曲率半径は、前記第2板材の前記凸側主面の曲率半径よりも小さい板であり、
前記第1板材の前記凹側主面の少なくとも一部に中間層用液剤及びシール剤を設けることと、
前記中間層用液剤及びシール剤を設けた前記凹側主面に、前記第2板材の前記凸側主面を貼り合わせて積層体を得ることと、
前記積層体を減圧下に供することと、
を含む、ガラス板構成体の製造方法。
このガラス板構成体の製造方法によれば、曲率半径が小さい第1板材の凹側主面と、曲率半径が大きい第2板材の凸側主面とを、中間層用液剤及びシール剤を介して貼り合わせることで、第1板材と第2板材とを精度良く組み合わせることができ、しかも、外縁部の隙間が小さくなる。よって、中間層を第1板材と第2板材との間に安定して挟み込むことができる。
このガラス板構成体の製造方法によれば、製造したガラス板構成体において、ガラス板が割れたときに、ガラス板が飛散しにくくなる。
このガラス板構成体の製造方法によれば、空気が中間層に入り込むことを確実に防止できる。
このガラス板構成体の製造方法によれば、中間層が液体層を含む場合において、液体の漏洩を確実に防止できる。
このガラス板構成体の製造方法によれば、第1板材と第2板材との間に配置される中間層が安定して挟み込まれる。
11a 凸側主面
11b 凹側主面
13 第2板材
13a 凸側主面
13b 凹側主面
15 中間層(液体層)
17 外縁部
19 シール部
21 中間層用液剤
23 シール剤
31 第1固体層
33 第2固体層
100,101 ガラス板構成体
Claims (20)
- 板厚方向に互いに重なって配置された第1板材及び第2板材と、前記第1板材と前記第2板材との間に設けられた中間層とを備え、前記第1板材と前記第2板材のうち少なくとも一方がガラス板であるガラス板構成体であって、
前記第1板材及び前記第2板材のそれぞれは、板厚方向に突出する凸側主面と、前記凸側主面の反対側の凹側主面とを有する曲面部を有する板であり、
前記第1板材の前記凹側主面と、前記第2板材の前記凸側主面とは、互いに対向して重ね合わされ、
前記第1板材の前記凹側主面の曲率半径は、前記第2板材の前記凸側主面の曲率半径よりも小さい、ガラス板構成体。 - 前記第1板材と前記第2板材との間の板厚方向の間隔は、前記第1板材と前記第2板材との外縁部から中心部に向かって広がっている、請求項1に記載のガラス板構成体。
- 前記中間層は、固相である、請求項1又は2に記載のガラス板構成体。
- 前記中間層は、液体層を含む、請求項1又は2に記載のガラス板構成体。
- 前記第1板材と前記液体層との間、及び、前記第2板材と前記液体層との間、の少なくとも一方に、固体層を有する、請求項4に記載のガラス板構成体。
- 前記固体層は、前記ガラス板の板厚よりも薄い、請求項5に記載のガラス板構成体。
- 前記固体層は、樹脂材料を含む請求項5又は6に記載のガラス板構成体。
- 前記第1板材及び前記第2板材の外縁部には、前記第1板材と前記第2板材とを互いに接合するシール部が設けられ、
前記液体層は、前記シール部に囲まれた内側空間に封止されている、
請求項4~7のいずれかに記載のガラス板構成体。 - 前記シール部に設けられたシール剤の粘性係数は、前記液体層の粘性係数よりも高い、請求項8に記載のガラス板構成体。
- 前記シール部の粘性係数は、1×10-1Pa・s以上であり、前記液体層の粘性係数が1×103・s以下である、請求項8又は9に記載のガラス板構成体。
- 前記液体層は、シリコーンを含む液剤である、
請求項4~10のいずれかに記載のガラス板構成体。 - 前記第1板材と前記第2板材とは、平面視で互いに同一の形状を有する、
請求項1~11のいずれかに記載のガラス板構成体。 - 前記第1板材及び前記第2板材の外縁部における前記板材同士の隙間は、全周にわたって0.5mm以下にされている、請求項1~12のいずれかに記載のガラス板構成体。
- 前記第1板材と前記第2板材とは、共にガラス板である、
請求項1~13のいずれかに記載のガラス板構成体。 - 前記第1板材と前記第2板材の25℃における損失係数は、1×10-4以上、5×10-3以下である、請求項1~14のいずれか1項に記載のガラス板構成体。
- 板厚方向に互いに重なって配置された第1板材及び第2板材と、前記第1板材と前記第2板材との間に設けられた中間層とを備え、前記第1板材と前記第2板材とのうち少なくとも一方がガラス板であるガラス板構成体の製造方法であって、
前記第1板材及び前記第2板材のそれぞれは、板厚方向に突出する凸側主面と、前記凸側主面の反対側の凹側主面とを有する曲面部を有し、前記第1板材の前記凹側主面の曲率半径は、前記第2板材の前記凸側主面の曲率半径よりも小さい板であり、
前記第1板材の前記凹側主面の少なくとも一部に中間層用液剤及びシール剤を設けることと、
前記中間層用液剤及びシール剤を設けた前記凹側主面に、前記第2板材の前記凸側主面を貼り合わせて積層体を得ることと、
前記積層体を減圧下に供することと、
を含む、ガラス板構成体の製造方法。 - 前記第1板材と前記中間層用液剤との間、及び、前記第2板材と前記中間層用液剤との間の少なくとも一方に固体層を備える、請求項16に記載のガラス板構成体の製造方法。
- 前記積層体は、減圧下に供した後に加圧する、請求項16又は17に記載のガラス板構成体の製造方法。
- 前記シール剤を設けた後に、該シール剤を硬化させる、請求項16~18のいずれかに記載のガラス板構成体の製造方法。
- 前記シール剤を設けた後に、前記中間層用液剤を硬化させる、請求項16~19のいずれかに記載のガラス板構成体の製造方法。
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WO2018135495A1 (ja) * | 2017-01-17 | 2018-07-26 | 積水化学工業株式会社 | 充填接合材、保護シート付き充填接合材、積層体、光学デバイス及び光学デバイス用保護パネル |
JP2019527158A (ja) * | 2016-05-19 | 2019-09-26 | エージーシー オートモーティヴ アメリカズ アールアンドディー,インコーポレイテッド | 前面カメラに関連する可変厚さプロファイルを有する車両用の窓組立体 |
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