WO2018210900A1 - Functionalized laminated safety glass and process of manufacturing the same - Google Patents
Functionalized laminated safety glass and process of manufacturing the same Download PDFInfo
- Publication number
- WO2018210900A1 WO2018210900A1 PCT/EP2018/062652 EP2018062652W WO2018210900A1 WO 2018210900 A1 WO2018210900 A1 WO 2018210900A1 EP 2018062652 W EP2018062652 W EP 2018062652W WO 2018210900 A1 WO2018210900 A1 WO 2018210900A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- glass
- adhesive layer
- thickness
- laminate according
- laminate
- Prior art date
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Classifications
-
- 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
- B32B17/10045—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 with at least one intermediate layer consisting of a glass sheet
-
- 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
- B32B17/10165—Functional features of the laminated safety glass or glazing
-
- 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
- B32B17/10761—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 containing vinyl acetal
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H5/00—Armour; Armour plates
- F41H5/02—Plate construction
- F41H5/04—Plate construction composed of more than one layer
- F41H5/0407—Transparent bullet-proof laminatesinformative reference: layered products essentially comprising glass in general B32B17/06, e.g. B32B17/10009; manufacture or composition of glass, e.g. joining glass to glass C03; permanent multiple-glazing windows, e.g. with spacing therebetween, E06B3/66
Abstract
The invention is directed to a laminate comprising layers in the sequence: First sheet of glass having a thickness of more than 2.1 mm; first adhesive layer; second sheet of glass having a thickness of more than 2.1 mm; functional layer; second adhesive layer; third glass sheet having a thickness of less than 2.0 mm and a process for manufacture such laminate.
Description
Functionalized laminated safety glass and process of manufacturing the same
Described is a laminated safety glass and process of manufacturing the same, comprising functional layers, which are sensitive to typical autoclave conditions.
Background Laminated safety glass is produced by bonding at least two panes of glass together. Therefor typically a hot-melt adhesive like polyvinyl butyral or an ionomer is used. The glass and the adhesive are typically processed during an autoclave process, which utilizes high temperature around 140°C and pressure of about 12 bar to ensure proper performing laminates. As there is an ongoing need of further functionalizing laminated safety glass with regard to energy control, displaying information or heating function, there is also a need for incorporating certain functional layers within or onto the laminated safety glass. These functional layers, however, are typically prone to be damaged during the autoclave process due to their (e.g. thermal or mechanical) sensitivity. Such functional laminates are especially important for automotive glass like windshields. However, especially automotive windshields are highly demanding parts regarding safety, requiring autoclave conditions to form a well performing part.
Thus a laminated safety glass with sufficient mechanical properties and a process of manufacturing the same is proposed, which also enables incorporation of functional layers.
Object of the invention is a laminate comprising layers in the sequence: First sheet of glass having a thickness of more than 2.1 mm; first adhesive layer; second sheet of glass having a thickness of more than 2.1 mm; functional layer; second adhesive layer; third glass sheet having a thickness of less than 2.0 mm.
Possible adhesives to attach the functional layer are pressure sensitive adhesives, cross-linkable adhesives or thermoplastic processible adhesives. Preferred are transparent, thermoplastic interlayers based on polyvinyl acetals like polyvinyl butyral; polyvinyl alcohol ; ionomeric films like SentryGlas®; Poly(methyl
methacrylate); ethylene-vinyl acetate; polyvinyl chloride; thermoplastic polyurethane
and Hybrar™ (styrene block copolymers with a flexible vinyl polydiene block, hydrogenated and non-hydrogenated).
Preferred for the first layer are plasticized PVB interlayer films with a thickness of 0.38 to 1 .15 mm which are commercial available for example under the tradename TROSIFOL.
Most preferred for first and/or second adhesive layer are polyvinyl butyral interlayers having a plasticizer content ranging from 0 weight percent to 40 w-%, more preferably 5 w-% to 0 w-% in order to avoid migration of plasticizer into the functional layer and / or its supportive substrate. The thickness of the second adhesive interlayer ranges from 10 μιη to 1 .52 mm, preferably from 10 μιη to 200 μιη to enable not to increase thickness of the final device.
The average molar mass of the polyvinyl butyral utilized for forming the second adhesive layer ranges from 10,000 g/mol to 1 10,000 g/mol. Preferred are polyvinyl butyral having a glass transition temperature of 63°C to 73°C and/or a softening temperature of 100°C-225°C according to DIN ISO 4625. More preferable are polyvinyl butyrals having an average molar mass between 20,000 g/mol to 45,000 g/mol and or having a glass transition temperature of 63°C to 64°C and/or having a softening temperature 125°C-190°C according to DIN ISO 4625.
The functional layer which shall be applied onto at least one of the outer surfaces of the first laminate, may be a heatable structure like a metal mesh, metallic nanowires or a metal grid based on gold, silver, tungsten, copper, aluminium or iron; closed transparent conductive layers based on indium tin oxide, fluorine tin oxide, aluminium zinc oxide or antimony tin oxide; a holographic optical element which may be based on a photopolymer supported by a polymeric, transparent substrate; an electrochromic layer; a transparent, organic light-emitting device; a transparent, organic photovoltaic module; or combinations of these comprising a stand-alone layer and / or supported by a transparent polymeric substrate, which covers the whole initial windshield laminate or parts of it.
These functional layers, especially holographic optical elements may be damaged during the harsh conditions of an autoclaving process. Further they are sensitive to the usage of the laminate as windscreen, as the layers are very thin ranging from
100 nm to 2mm and thus showing low mechanical loadability. Holographic optical elements are typically 3 μιη to 30 μιη thick, fragile structures on a supportive, transparent polymeric substrate like polyamide.
In order to protect these sensitive, functional layers against environmental influences like mechanical loads causing scratches or oxygen causing degradation, a third glass pane is applied on top of the functional layer which is adhered by above mentioned adhesives.
The first and second glass layer may have the same or a different thickness and may be any glass type suitable for windscreens. The third glass layer protecting the functional layer is preferably very thin, ranging from 25 μιη to 1 mm, preferably from 25 μιη to 500 μιη, most preferred from 25 μιη to 210 μιη like the commercial available Corning® Willow® Glass or from Schott, Germany (e.g. D 263® T eco AF 32® eco) in order to avoid significant increase of thickness and weight of the final laminated device. By reducing the thickness of the inner glass pane [3] of the resulting triple glass laminate by the thickness of the functional layer and its adhesive [4] and the thin outer glass pane [5], the functional tri-laminate shows the same thickness as a regular, non-functionalized laminated windshield. This thickness retention enables the same process ability as regular windshield laminates and doesn't require changes at downstream production steps.
Another object of the invention is a process to manufacture a laminate as disclosed by first laminating two first sheets of glass each having a thickness of more than 2.1 mm with interposed first adhesive layer under autoclave conditions, and second, laminating a functional layer, a second adhesive layer and a second glass sheet having a thickness of less than 2.0 mm under non-autoclave conditions.
In order to ensure a proper performing laminate it is proposed to have a two-step process: In a first step a regular windshield laminate is produced by pre-lamination not in an autoclave (e.g. in a vacuum bag) followed by final lamination in an
autoclave which is well-known to the person skilled in the art. These procedures ensure a proper bubble-free laminate regarding mechanical and safety properties.
In a second step the functional layer is applied onto the inner or outer surface of the glass laminate, thereby covering the whole surface or only parts of it, by any kind of adhesive and/or process which enables preserving of the functional layer to be applied.
For example, in the first step a non-functionalized windshield laminate as known in the art may be formed with a regular autoclave process, comprising two 2.1 mm thick glass panes and a 0.38 mm thick PVB interlayer in between. In a second step the functional layer, with or without a supportive carrier film made from e.g. polyamide, transparent, polymeric substrate, having a total thickness of 0.1 mm, the hot-melt adhesive as for example polyvinyl butyral thin films having 0% to < 5 % plasticizer content, form of a 0.1 mm thick interlayer and the thin glass having a thickness of 0.2 mm are applied onto the surface of the non-functionalized windshield laminate. Acylates, PSA and others may also be employed as adhesives.
The process utilized for applying the sensitive, functional layers and the thin glass with the adhesive onto the pre-laminate is characterized by significant lower temperature and pressure than a regular autoclave process.
The functional layer and the thin glass may be applied to the pre-laminate by laying the functional layer on top of the pre-laminate, followed by an adhesive interlayer and the thin glass sequentially; or by laying an adhesive interlayer on top of the pre- laminate, followed by the functional layer and the thin glass sequentially; or by laying an adhesive interlayer on top of the pre-laminate, followed by the functional layer, another adhesive interlayer and the thin glass sequentially. Hereafter a pressure ranging from a vacuum (0,2 bar) to 1 1 bar, preferably ranging from a vacuum to 5 bar, most preferred ranging from a vacuum to 2 bar; and a temperature of 90°C to 139°C, preferably 100°C to 125°C, most preferred 100°C to 1 10°C are applied to the stack.
Employing acrylates like e.g. LOCTITE DSP 3194 may be cured by UV-light at room temperature.
Claims
Claims
1 Laminate comprising layers in the sequence:
First sheet of glass having a thickness of more than 2.1 mm ; first adhesive layer; second sheet of glass having a thickness of more than 2.1 mm ; functional layer; second adhesive layer; third glass sheet having a thickness of less than 2.0 mm.
2 Laminate according to claim 1 characterized in that the first and/or second adhesive layer comprises plasticized polyvinylacetal.
3 Laminate according to claim 1 or 2 characterized in that the second
adhesive layer has a glass transition temperature of 63°C to 73°C
4 Laminate according to claim 1 or 2 characterized in that the second
adhesive layer has a softening temperature of 100°C-225°C according to DIN ISO 4625.
5 Laminate according to claim 1 to 4 characterized in that the second
adhesive layer comprises a mixture of polyvinyl acetal with 0 - 40 whgt % plasticizer.
6 Laminate according to claim 1 to 5 characterized in that the second
adhesive layer comprises polyvinyl butyral with an average molar mass between 10,000 g/mol to 1 10,000 g/mol.
7 Laminate according to claim 1 to 6 characterized in that the functional layer is selected from the group consisting of a heatable structure, a metal mesh, metallic nanowires, a metal grid a closed transparent conductive layer a holographic optical element an electrochromic layer; a transparent organic light-emitting device; a transparent organic photovoltaic module.
8 Laminate according to claim 1 to 7 characterized in that the functional layer is supported by a transparent polymeric substrate.
Process to manufacture a laminate according to claim 1 to 8 by first laminating two first sheets of glass each having a thickness of more than 2.1 mm with interposed first adhesive layer under autoclave conditions, and second, laminating a functional layer, a second adhesive layer and a second glass sheet having a thickness of less than 2.0 mm under non- autoclave conditions.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017208431 | 2017-05-18 | ||
| DE102017208431.6 | 2017-05-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2018210900A1 true WO2018210900A1 (en) | 2018-11-22 |
Family
ID=62167354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2018/062652 WO2018210900A1 (en) | 2017-05-18 | 2018-05-16 | Functionalized laminated safety glass and process of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2018210900A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110077039A (en) * | 2019-04-09 | 2019-08-02 | 陈树 | A kind of explosion-proof tempered glass and its processing technology |
| WO2020107674A1 (en) * | 2018-11-28 | 2020-06-04 | 江南大学 | Multilayer bulletproof member, preparation method therefor and application thereof |
| US11441876B2 (en) | 2018-11-28 | 2022-09-13 | Jiangnan University | Multilayered bullet resistant member, preparation method and application thereof |
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|---|---|---|---|---|
| US20050002081A1 (en) * | 2001-09-14 | 2005-01-06 | Fabien Beteille | Functional safety glazing unit |
| DE102006042538A1 (en) * | 2006-09-11 | 2008-03-27 | Futech Gmbh | Composite glass used as safety glass comprises a first thick glass made from hardened soda-lime glass and a first thin glass having a functionalized surface |
| US20090176101A1 (en) * | 2006-04-20 | 2009-07-09 | Pilkington Group Limited | Glazing |
| US20100020381A1 (en) * | 2006-12-15 | 2010-01-28 | Saint-Gobain Glass France | Functionalized glazing |
| DE102012210906A1 (en) * | 2012-06-27 | 2014-01-02 | Schott Ag | Special safety glazing has transparent inorganic discs having sides which are separated by plastic sheet so that ratio of thickness of primary transparent inorganic disc to thickness of secondary inorganic disc is preset value |
| US20140072754A1 (en) * | 2012-09-07 | 2014-03-13 | Schott Ag | Transparent laminate which inhibits puncture by projectiles |
-
2018
- 2018-05-16 WO PCT/EP2018/062652 patent/WO2018210900A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050002081A1 (en) * | 2001-09-14 | 2005-01-06 | Fabien Beteille | Functional safety glazing unit |
| US20090176101A1 (en) * | 2006-04-20 | 2009-07-09 | Pilkington Group Limited | Glazing |
| DE102006042538A1 (en) * | 2006-09-11 | 2008-03-27 | Futech Gmbh | Composite glass used as safety glass comprises a first thick glass made from hardened soda-lime glass and a first thin glass having a functionalized surface |
| US20100020381A1 (en) * | 2006-12-15 | 2010-01-28 | Saint-Gobain Glass France | Functionalized glazing |
| DE102012210906A1 (en) * | 2012-06-27 | 2014-01-02 | Schott Ag | Special safety glazing has transparent inorganic discs having sides which are separated by plastic sheet so that ratio of thickness of primary transparent inorganic disc to thickness of secondary inorganic disc is preset value |
| US20140072754A1 (en) * | 2012-09-07 | 2014-03-13 | Schott Ag | Transparent laminate which inhibits puncture by projectiles |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020107674A1 (en) * | 2018-11-28 | 2020-06-04 | 江南大学 | Multilayer bulletproof member, preparation method therefor and application thereof |
| US11441876B2 (en) | 2018-11-28 | 2022-09-13 | Jiangnan University | Multilayered bullet resistant member, preparation method and application thereof |
| CN110077039A (en) * | 2019-04-09 | 2019-08-02 | 陈树 | A kind of explosion-proof tempered glass and its processing technology |
| CN110077039B (en) * | 2019-04-09 | 2021-04-27 | 秦皇岛长城玻璃工业有限公司 | Explosion-proof toughened glass and processing technology thereof |
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