WO2017179382A1 - Verre feuilleté et procédé pour sa production - Google Patents

Verre feuilleté et procédé pour sa production Download PDF

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Publication number
WO2017179382A1
WO2017179382A1 PCT/JP2017/011490 JP2017011490W WO2017179382A1 WO 2017179382 A1 WO2017179382 A1 WO 2017179382A1 JP 2017011490 W JP2017011490 W JP 2017011490W WO 2017179382 A1 WO2017179382 A1 WO 2017179382A1
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WO
WIPO (PCT)
Prior art keywords
glass plate
glass
curvature
radius
laminated
Prior art date
Application number
PCT/JP2017/011490
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English (en)
Japanese (ja)
Inventor
隆行 野田
慎護 中根
Original Assignee
日本電気硝子株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電気硝子株式会社 filed Critical 日本電気硝子株式会社
Publication of WO2017179382A1 publication Critical patent/WO2017179382A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J1/00—Windows; Windscreens; Accessories therefor
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds

Definitions

  • the present invention relates to laminated glass used for vehicles such as automobiles and railways and vehicles such as aircraft.
  • a laminated glass for a vehicle is generally manufactured by bonding two glass plates formed in a curved shape with a polyvinyl butyral film (PVB film).
  • PVB film polyvinyl butyral film
  • bending of laminated glass for vehicles is performed by laminating two sheet glasses via a release agent such as boron nitride (BN), diatomaceous earth, and magnesium oxide, and bending the glass at the same time. It is common to separate and wash one by one later.
  • BN boron nitride
  • diatomaceous earth diatomaceous earth
  • magnesium oxide magnesium oxide
  • changing the type of glass plate causes the following problems. That is, when the type of glass plate, particularly the glass composition, is changed, the preferred bending temperature of the glass plate also changes.
  • the glass sheet cannot be bent at a suitable bending temperature, the following problem occurs.
  • the bending temperature is low, a desired bent shape cannot be obtained, and when it is high, the surface property of the glass plate is deteriorated.
  • two sheet glasses having different bending temperatures are bent at the same time as described in Patent Document 1, it is necessary to set the temperature to a sheet glass having a higher preferable bending temperature. There is a problem that the surface accuracy of the plate glass having a lower preferred bending temperature is deteriorated.
  • the following problems occur when the chemically strengthened glass is employed only on the internal environment side. That is, even if two glass plates are bent at the same time by an apparatus such as Patent Document 1, the glass plate on the internal environment side after chemical strengthening is performed by performing the chemical strengthening process only on the glass plate on the internal environment side thereafter. It is a problem that the curvature of is changed. Even in this case, there arises a problem that the bending stress is not constant as in the case where the above-described two glass sheets are individually bent.
  • the present invention has been made to solve the above-mentioned problems of the prior art, and even when two different types of glass plates are used, laminated glass having a certain quality, and its
  • the object is to propose a manufacturing method.
  • the invention devised to solve the above problems is a laminated glass having a first glass plate, a second glass plate, and an intermediate film between the first glass plate and the second glass plate,
  • the thickness of the second glass plate is thinner than the thickness of the first glass plate
  • the first glass plate is curved and formed to have a first radius of curvature.
  • the first glass plate and the second glass plate are bonded to each other with the intermediate film.
  • the second glass plate is curved so as to have a second radius of curvature, and the first radius of curvature is larger than the second radius of curvature.
  • the convex curve reduction amount is preferably zero.
  • the thickness of the first glass plate is 1 mm to 3 mm, and the thickness of the second glass plate is 0.3 mm to 2 mm.
  • the first glass plate is soda lime glass and the second glass plate is aluminosilicate glass.
  • the present invention devised to solve the above problems is a method for producing a laminated glass, comprising: a first preparation step of bending a first glass plate with a first radius of curvature; and the first glass plate.
  • the invention relates to a method for producing a laminated glass.
  • the second preparation step bend the second glass plate with a second curvature radius larger than the first curvature radius.
  • the curve forming temperature in the second preparation step is higher than the curve forming temperature in the first preparation step.
  • a laminated glass with stable quality can be produced.
  • the laminated glass 1 according to the present invention has a first glass plate 2 and a second glass plate 3 bonded together with an intermediate film 4.
  • the first glass plate 2 is arranged on the external environment side when mounted on a vehicle such as an automobile in the state of the laminated glass 1.
  • the convex surface 2a side of the first glass plate 2 is the external environment side, and the intermediate film 4 is disposed on the concave surface 2b side.
  • soda lime glass is preferably used from the viewpoint of strength and cost.
  • the first glass plate 2 has a glass composition of 70% by mass, SiO 2 70 to 75%, Al 2 O 3 0 to 5%, CaO 5 to 15%, MgO 0 to 5% Na 2 O 10 to 15%.
  • the thickness of the first glass plate 2 is preferably 1 mm to 3 mm, more preferably 1.3 mm to 2.5 mm, and preferably 1.3 mm to 2.1 mm. More preferably, it is 1.6 mm to 2.1 mm.
  • the second glass plate 3 is arranged on the internal environment side when mounted on a vehicle such as an automobile in the state of the laminated glass 1.
  • the intermediate film 4 is disposed on the convex surface 3a side of the second glass plate 3, and the concave surface 3b side is the internal environment side.
  • the second glass plate 3 is preferably glass having a composition and characteristics different from those of the first glass plate 2.
  • the second glass plate 3 preferably has a glass composition different from that of the first glass plate 2, and aluminosilicate glass is preferably used from the viewpoint of strength.
  • the 2nd glass plate 3 is a glass which has a different characteristic from the 1st glass plate 2, and it is preferable to use chemically strengthened glass from a viewpoint of raising an intensity
  • the glass composition is SiO 2 50 to 80%, Al 2 O 3 5 to 25%, B 2 O 3 0 by mass%. It is preferable to use a tempered glass plate containing -15%, Na 2 O 1-20%, and K 2 O 0-10%. If the glass composition range is regulated as described above, it becomes easy to achieve both ion exchange performance and devitrification resistance at a high level. Further, as the second glass plate 3, chemically tempered glass of soda lime glass can be used.
  • the second glass plate 3 is thinner than the first glass plate 2, and the thickness is preferably 0.1 mm to 2 mm, more preferably 0.3 mm to 2 mm, and More preferably, it is 5 mm to 1.5 mm.
  • the thickness of the second glass plate 3 is smaller than that of the first glass plate 2, the weight of the laminated glass 1 as a whole can be reduced.
  • the first glass plate 2 and the second glass plate 3 used in the present invention are prepared using a known float method, rollout method, slot down draw method, overflow down draw method, redraw method, or the like. Can do. Since the first glass plate 2 has a large thickness, it is preferably manufactured by a float method, and the second glass plate 3 has a small thickness, and is preferably manufactured by an overflow down draw method.
  • PVB polyvinyl butyral
  • EVA ethylene / vinyl acetate copolymer resin
  • TPU thermoplastic polyurethane
  • FIG. 2 is a side view of the first glass plate 2 used in the present invention.
  • the first glass plate 2 is curved so as to have a first radius of curvature R1.
  • the method of curve-forming the first glass plate 2 is not particularly limited, and the first glass plate 2 is formed by a known method such as a self-weight bending method by heating, a hinge method, a suction method, a gas furnace method, a horizontal press method, or the like. Can be curved.
  • the first radius of curvature R1 of the first glass plate 2 is appropriately set according to the vehicle to be mounted, but is 1000 mmR to 8000 mmR when the vehicle on which the laminated glass 1 is mounted is an automobile window glass. It is preferable.
  • the first radius of curvature R1 is mounted. Is the same as the radius of curvature required for the vehicle.
  • the first radius of curvature R1 of the first glass plate 2 decreases, the amount of decrease in the convex curvature of the first glass plate 2 that occurs after the bonding step is taken into consideration. Then, the first curvature radius R1 is set.
  • FIG. 3 is a perspective view of the second glass plate 3.
  • FIG. 4 is a side view of the curved second glass plate 4.
  • the 2nd glass plate 3 has flexibility (for example, when the thickness of the 2nd glass plate 3 is 0.1 mm or more and less than 0.3 mm), or the 1st curvature radius of the 1st glass plate 2
  • R1 is sufficiently large with respect to the thickness of the second glass plate 3 and the second glass plate 3 can sufficiently follow the curved shape of the first glass plate 2, as shown in FIG.
  • the second glass plate 3 need not be curved.
  • the thickness of the second glass plate 4 is relatively thick, such as 0.3 mm or more, the second glass plate 3 is curved so as to have a second radius of curvature R2, as shown in FIG.
  • the second radius of curvature R2 of the second glass plate 3 is preferably larger than the first radius of curvature R1 of the first glass plate 2.
  • the maximum value of the stress change amount is preferably 100 MPa or less, more preferably 70 MPa or less, and further preferably 50 MPa or less.
  • the curvature of the second radius of curvature R2 (in some cases, the use of the flat second glass plate 3) is determined so that the second glass plate 3 has the above stress change amount.
  • FIG. 5 is a diagram illustrating the amount of decrease in convex curvature of the first glass plate 2 of the present invention.
  • FIG. 6 is a diagram for explaining the amount of increase in the convex curve of the second glass plate 3 of the present invention. In FIGS. 5 and 6, the curvature is emphasized for the sake of explanation.
  • the central portion 2d of the concave surface 2b is spaced upward from the virtual straight line L1 connecting the lower ends 2c of the first glass plate 2. It becomes a state, and the separation distance is set to t1.
  • the curved shape of the first glass plate 2 does not change or changes so that the degree of curvature decreases.
  • the distance between the virtual straight line L1 connecting the lower ends 2c of the first glass plate 2 and the central portion 2d is t2.
  • t1-t2 is defined as a concave curve reduction amount t3.
  • t3 0, that is, the convex curve reduction amount t3 is zero.
  • the second glass plate 3 is curved with a second radius of curvature R2.
  • the distance from the virtual straight line L2 connecting the lower ends 3c of the second glass plate 3 to the central portion 3d is defined as t4.
  • the curved shape of the second glass plate 3 further changes to a convex shape.
  • the distance between the virtual straight line L2 connecting the lower ends 3c of the second glass plate 3 and the central portion 3d is defined as t5.
  • t5-t4 is defined as the convex curve deformation amount t6.
  • the convex curve decrease amount t3 of the first glass plate 2 is smaller than the convex curve increase amount t6 of the second glass plate 3.
  • the tensile stress is applied to the convex surface 3a side of the second glass plate 3, and the compressive stress is reliably applied to the concave surface 3b side.
  • the laminated glass 1 of the state to which the stable stress was provided can be produced.
  • the convex curve reduction amount t3 is zero. Therefore, since the laminated glass 1 can be produced so that the 2nd glass plate 3 may be followed by the curved shape of the 1st glass plate 2, it can compress and tensile stress more reliably and stably. While being able to give to the glass plate 3, it can be set as the laminated glass 1 which has a desired curved shape.
  • FIG. 7 is a view showing a flowchart of a method for manufacturing a laminated glass according to the present invention.
  • the manufacturing method of the laminated glass which concerns on this invention performs the adhesion
  • FIG. 8 is a schematic diagram of the first preparation step S1.
  • the first preparation step S1 is a step of bending the first glass plate 2 so as to have the first radius of curvature R1.
  • FIG. 8 illustrates a horizontal press method, in which the first glass plate 2 is placed on the female die 5, and the first glass plate 2 is heated by a heater such as a heater (not shown) while the male die 6. Thus, the first glass plate 2 is pressed with the first radius of curvature R1 by pressing the first glass plate 2.
  • the preparation step S1 is not limited to the horizontal press method, and a known method such as a self-weight bending method, a hinge method, a gas furnace method, or a roller method can be appropriately employed.
  • the second preparation step S2 is a step of preparing the second glass plate 3. As shown in FIG. 7, the second preparation step S2 is preferably performed in parallel with the first preparation step S1.
  • the second preparation step S2 for preparing the second glass plate 3 is performed when the second glass plate 3 has flexibility (for example, the thickness of the second glass plate 3 is 0.1 mm to 0.3 mm). Or the first glass plate 2 has a first radius of curvature R1 that is sufficiently larger than the thickness of the second glass plate 3, and the second glass plate 3 is If it is possible to sufficiently follow the curved shape, the process is terminated by cutting the second glass plate 3 to a desired size.
  • the second glass plate 3 is curved and formed so as to have the second radius of curvature R2.
  • the second curvature radius R2 of the second glass plate 3 is preferably larger than the first curvature radius R1 of the first glass plate 2.
  • a known method such as a horizontal press method can be adopted as in the preparation step S2 of the first glass plate 2 described above.
  • the curve forming temperature in the second preparation step S2 is higher than the curve forming temperature in the first preparation step S1.
  • the second plate glass 3 has a more suitable bending temperature than the first plate glass 2. It tends to be higher.
  • the first preparatory step S1 and the second preparatory step S2 perform curve forming in a separate line (with a separate bending device).
  • the difference between the curve forming temperature in the second preparation step and the curve forming temperature in the first preparation step is preferably 50 ° C. to 150 ° C., more preferably 80 to 120 ° C.
  • the second preparation step S2 preferably further includes a chemical strengthening step.
  • the chemical strengthening step is preferably performed after the second glass plate 3 is cut to a desired size, and when the second glass plate 3 needs to be bent, the second glass plate 3 is bent. It is preferable to be performed after.
  • the second glass plate 3 is immersed in a molten salt of potassium nitrate at 360 ° C. to 500 ° C. for about 15 minutes to 12 hours, followed by slow cooling, washing, and the like.
  • the bonding step S3 is a step of bonding the first glass plate 2 and the second glass plate 3 with the intermediate film 4.
  • FIG. 9 is a diagram in which the intermediate film 4 is disposed between the first glass plate 2 and the second glass plate 3 when performing the bonding step S3 of the present invention. As shown in FIG. 9, the intermediate film 4 is disposed between the concave surface 2 b of the first glass plate 2 and the convex surface 3 a of the second glass plate 3.
  • the second glass plate 3 is disposed on the convex surface 7 a of the jig 7, the intermediate film 4 is disposed thereon, and the first glass plate 2 is disposed thereon.
  • the convex surface 7a of the jig 7 is formed by calculating so that the finally produced laminated glass 1 has a desired radius of curvature.
  • the first radius of curvature R1 of the first glass plate 2 does not increase.
  • the description is given using the jig 7 having the convex surface 7 a, but the jig 7 having the concave surface is prepared, and the first glass plate 2, the intermediate film 4, and the second glass plate are provided on the concave surface. 3 may be arranged. Even in this case, the concave surface of the jig 7 is formed after calculation so that the finally produced laminated glass 1 has a desired radius of curvature.
  • the adhesive force of the intermediate film 4 is exhibited with the first glass plate 2, the intermediate film 4, and the second glass plate 3 placed on the jig 7.
  • the first glass plate 2 and the second glass plate 3 are bonded to each other with the intermediate film 4 by sealing the jig 7 together with a vacuum bag (not shown) and heating and pressurizing with an autoclave or the like.
  • a weight or the like (not shown) is appropriately used.
  • the first glass plate 2 and the second glass plate 3 laminated through the intermediate film are passed between the rollers in a heated state and temporarily pressed, and then processed by an autoclave.
  • the first glass plate 2 and the second glass plate 3 may be permanently bonded.
  • the present invention can be suitably used mainly for window glass for vehicles such as automobiles.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Abstract

L'invention concerne un verre feuilleté 1 comprenant : une première feuille de verre 2 ; une deuxième feuille de verre 3 ; et un film intermédiaire 4 entre la première feuille de verre 2 et la deuxième feuille de verre 3. Le verre feuilleté 1 est caractérisé en ce que : la deuxième feuille de verre 3 est plus mince que la première feuille de verre 2 ; la première feuille de verre 2 est courbée et formée de manière à présenter un premier rayon de courbure R1 ; le film intermédiaire 4 est présent sur un côté de surface concave 2b de la première feuille de verre 2 ; et la première feuille de verre 2 et la deuxième feuille de verre 3 sont collées via le film intermédiaire 4 dans un état dans lequel une quantité de réduction t3 de courbure convexe à partir du premier rayon de courbure R1 de la première feuille de verre 2 est inférieure à une quantité d'augmentation t6 de courbure convexe de la deuxième feuille de verre 3.
PCT/JP2017/011490 2016-04-15 2017-03-22 Verre feuilleté et procédé pour sa production WO2017179382A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016082001A JP2017190271A (ja) 2016-04-15 2016-04-15 合わせガラス、及び、その製造方法
JP2016-082001 2016-04-15

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3712119A4 (fr) * 2018-05-21 2021-04-07 Lg Chem, Ltd. Procédé de fabrication de verre feuilleté incurvé et verre feuilleté incurvé ainsi fabriqué
US20210268775A1 (en) * 2018-07-13 2021-09-02 Central Glass Company, Limited Laminated Glass for Automotive Windshields, and Method for Producing Same
US11577493B2 (en) 2018-05-24 2023-02-14 Lg Chem, Ltd. Method of manufacturing curved thin glass sheet having functional layer and method of manufacturing curved joined glass sheet having functional layer

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6988377B2 (ja) * 2017-11-01 2022-01-05 大日本印刷株式会社 合わせガラス製造装置、合わせガラス製造方法
KR102257831B1 (ko) * 2018-01-12 2021-05-28 주식회사 엘지화학 곡면 접합 유리 및 곡면 접합 유리의 제조 방법
KR102105151B1 (ko) * 2019-08-28 2020-04-27 주식회사 에이디하이텍 디스플레이 글라스의 곡면 성형용 폴리우레탄 패드 및 이의 제조 방법
WO2022244750A1 (fr) * 2021-05-20 2022-11-24 Ａｇｃ株式会社 Corps de structure de feuille de verre et procédé de fabrication de corps de structure de feuille de verre
JP2024091045A (ja) * 2022-12-23 2024-07-04 日本電気硝子株式会社 複合板材の製造方法、複合板材群、及び複合板材梱包体

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54100415A (en) * 1977-12-29 1979-08-08 Bfg Glassgroup Wind shild glass having inside plate of chemically strengthened silicate glass
JPS5761646A (en) * 1980-06-13 1982-04-14 Siv Soc Italiana Vetro Manufacture of over two bended bonded point glass plate
JPH1160293A (ja) * 1997-08-06 1999-03-02 Nippon Sheet Glass Co Ltd 合わせガラスおよび自動車窓構造
JP2007197288A (ja) * 2006-01-30 2007-08-09 Nippon Sheet Glass Co Ltd 合わせガラス及びこれを用いたガラス窓構造
JP2014527011A (ja) * 2011-07-04 2014-10-09 エージーシー グラス ユーロップ 自動車のための窓ガラス
JP2017048075A (ja) * 2015-08-31 2017-03-09 旭硝子株式会社 合わせ板、および合わせ板の製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54100415A (en) * 1977-12-29 1979-08-08 Bfg Glassgroup Wind shild glass having inside plate of chemically strengthened silicate glass
JPS5761646A (en) * 1980-06-13 1982-04-14 Siv Soc Italiana Vetro Manufacture of over two bended bonded point glass plate
JPH1160293A (ja) * 1997-08-06 1999-03-02 Nippon Sheet Glass Co Ltd 合わせガラスおよび自動車窓構造
JP2007197288A (ja) * 2006-01-30 2007-08-09 Nippon Sheet Glass Co Ltd 合わせガラス及びこれを用いたガラス窓構造
JP2014527011A (ja) * 2011-07-04 2014-10-09 エージーシー グラス ユーロップ 自動車のための窓ガラス
JP2017048075A (ja) * 2015-08-31 2017-03-09 旭硝子株式会社 合わせ板、および合わせ板の製造方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3712119A4 (fr) * 2018-05-21 2021-04-07 Lg Chem, Ltd. Procédé de fabrication de verre feuilleté incurvé et verre feuilleté incurvé ainsi fabriqué
US11242285B2 (en) 2018-05-21 2022-02-08 Lg Chem, Ltd. Method of manufacturing curved joined glass sheet and curved joined glass sheet manufactured by the same
US11577493B2 (en) 2018-05-24 2023-02-14 Lg Chem, Ltd. Method of manufacturing curved thin glass sheet having functional layer and method of manufacturing curved joined glass sheet having functional layer
US20210268775A1 (en) * 2018-07-13 2021-09-02 Central Glass Company, Limited Laminated Glass for Automotive Windshields, and Method for Producing Same

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