GB1578074A - Glass panels - Google Patents

Glass panels Download PDF

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Publication number
GB1578074A
GB1578074A GB28797/77A GB2879777A GB1578074A GB 1578074 A GB1578074 A GB 1578074A GB 28797/77 A GB28797/77 A GB 28797/77A GB 2879777 A GB2879777 A GB 2879777A GB 1578074 A GB1578074 A GB 1578074A
Authority
GB
United Kingdom
Prior art keywords
glass
sheet
sheets
coating
foamed plastics
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB28797/77A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zarach S L
Original Assignee
Zarach S L
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 Zarach S L filed Critical Zarach S L
Priority to GB28797/77A priority Critical patent/GB1578074A/en
Publication of GB1578074A publication Critical patent/GB1578074A/en
Expired legal-status Critical Current

Links

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
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
    • 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
    • B32B17/066—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 foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
    • B44C5/0407—Ornamental plaques, e.g. decorative panels, decorative veneers containing glass elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
    • B44C5/0415—Ornamental plaques, e.g. decorative panels, decorative veneers containing metallic elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F1/00—Designs or pictures characterised by special or unusual light effects
    • B44F1/02—Designs or pictures characterised by special or unusual light effects produced by reflected light, e.g. matt surfaces, lustrous surfaces
    • B44F1/04—Designs or pictures characterised by special or unusual light effects produced by reflected light, e.g. matt surfaces, lustrous surfaces after passage through surface layers, e.g. pictures with mirrors on the back
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/54—Slab-like translucent elements
    • 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
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0221—Vinyl resin
    • B32B2266/0235—Vinyl halide, e.g. PVC, PVDC, PVF, PVDF
    • 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
    • B32B2607/00—Walls, panels

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Laminated Bodies (AREA)
  • Surface Treatment Of Glass (AREA)

Description

(54) IMPROVEMENTS RELATING TO GLASS PANELS (71) I, SANDER LIONEL ZARACH, a British subject of 35 Brampton Grove, London NW4 do hereby declare the invention, for which I pray that a patent may be granted to me and the method by which it is to be performed, to be particularly described in and by the following statement: Thus invention relates to glass panels and particularly to decorative glass panels. Such panels may be coated with a plain silver or aluminium light reflecting coating to produce a plain mirror or they may be coated with a single, variegated or multi-coloured coating which may be partially or entirely reflective to produce a glass covering, for example a wall, a door, a ceiling or furniture. The coatings on such glass coverings are usually based on silver and the silver coating is chemically precipitated on to the surface with various other materials being added during the precipitation which affect the colour and reflectivity of the deposited silver layer. In this way a wide variety of permanent, decorative effects may be achieved.
Both types of glass panel may be mounted on walls, ceilings, furniture, fittings, or doors in the interior or on the exterior of buildings.
Plain mirrors are used extensively to create an illusion of space and reduce the austro phobic effect of small spaces. Once they are installed both types of glass panel require no maintenance except for surface cleaning since their coating is protected by the glass on to which it has been applied.
However, these glass panels do have one major drawback which is that glass is brittle and is liable to shatter. This can be caused by the glass being subjected to mechanical shock or by the glass being subjected to thermal shock, for example, if the building in which the panel is installed catches fire.
In this case the glass panels can represent an additional danger to any occupants of the building fleeing from the fire.
Various attempts have been made to overcome these disadvantages and reduce the danger posed by these glass panels. The panels have been laminated on to a sheet of plain glass with a sheet of plain transparent plastics material using a similar technique to that used in the lamination of the vehicle windscreens. Such a laminated panel has met with some success particularly with regard to mechanical shock but with regard to extremely high temperatures such as those subsisting in fires the panels cracked and remained in place for as little as 10 minutes before the plastics material softened or melted to allow the cracked and broken fragments to fall.
According to this invention a glass panel comprises two sheets of glass sandwiched together with a sheet of foamed plastics material bonded therebetween, one of the sheets of glass having a decorative or light reflecting coating applied to its inner face and having a protective coating between the decorative or light reflecting coating and the foamed plastics sheet.
Preferably the protective coatingisformed by a double layer, a first layer of copper against the decorative or light reflecting coating and a second layer of red lead based or other protective paint between the layer of copper and the formed plastics layer. This double layer protective coating gives greater protection for the decorative or light reflecting coating and provides a completely stable backing for it. It is desirable for the protective coating to be applied evenly so that good continuous contact can be achieved between the protective coating and the sheet of foamed plastics material.
The foamed plastics material preferably has a thickness within a range of 0.5 mm to 1.5 mm and the preferred thickness for the material is 1.0 mm. Preferably both faces of the foamed plastics material are coated with a high tack, high shear pressure sensitive adhesive to create the bond between the two sheets of glass and the foamed plastics material. Preferably the foamed plastics material is made from plasticised polyvinyl chlo ride having a hardness within the range of 55 to 65 on the Shore hardness 00 scale and a density between 0.19 and 0.26 g per cc.
INSEAL Sealant 5250 (Registered Trademark) manufactured by Industrial Sealants Limited is particularly effective as the foamed plastics material.
To produce a glass panel in accordance with this invention the decorative or light reflecting coating is applied to a sheet of glass then this coating is covered with a protective copper layer using conventional techniques. A red lead based or other protective paint is then applied to the copper layer using conventional techniques and apparatus including mechanical rollers to provide an even and uniform coating. The pressure sensitive adhesive coated plastics material is then carefully placed on to the paint backing to exclude as much air as possible and ensure good contact between the foam plastics sheet and the protective layer of paint. Finally the second sheet of glass is brought into contact with the other surface of the plastics sheets, again whilst as much air as possible is excluded. The laminated sheets are then rolled with a heavy roller to ensure that a good contact is achieved between both sheets of glass and the foamed plastics sheet. The completed laminate is then left for a period of time from 12 hours to 48 hours and usually about 24 hours. The laminate is then squeezed as it is passed through nips between two pairs of rollers before being placed in a heating chamber where it is heated to an elevated temperature which may be as high as 4000C. After this temperature treatment the laminate is preferably conditioned by a further storage period of up to 48 hours.
A particular example of a glass panel in accordance with this invention will now be described with reference to the accompanying drawing which is a cross-section through a panel with the thickness of the panel greatly exaggerated.
The glass panel in accordance with this invention is made by applying a decorative or light reflecting coating 1 to one side of the sheet of glass 2 and the decorative or light reflecting coating 1 is covered by a protective layer of copper 3, using conventional techniques. A red lead based paint 4 is then rolled onto the outside of the copper layer 3 to provide a uniform and even coating over the layer 3. A sheet of foamed plastics material 5 heaving pressure sensitive adhesive coatings 6 and 7 applied to its opposite faces is then applied to the outside of the red lead based paint 4. The sheet of foamed plastics material is Inseal Sealant 5250 (Registered Trade Mark) manufactured by Industrial Sealants Limited having a thickness of 1.0 mm. The sheet 5 is carefully placed onto the paint 4 excluding as much air as possible to ensure a good contact between the adhesive coating 6 and the paint 4. Finally a second sheet of glass 8 is brought into contact with the adhesive coating 7 on the other surface of the sheet 5 whilst, once again, as much air as possible is excluded.
The laminate is then rolled with a heavy rcller to ensure that as good a contact as possible is achieved between the adhesive coating 6 and 7 and the sheets of glass 2 and 8. The laminate is then left for about 24 hours before being squeezed as it is passed through nips between two pairs of rollers and placed in a heating chamber where it is heated to a temperature of approximately 4000 C. After this heat treatment the laminate is then conditioned by a further storage period of 48 hours before use.
Tests on the resulting glass panel have shown that when it is suspended horizontally with the urface unsupported except at its edges, the panel can withstand temperatures of substantially 18000C for 3+ hours without any separation of fragments of glass occuring.
During the tests both sheets of glass have cracked and the foamed plastics material 5 between the sheets of glass appeared to char but the splintered fragments of the sheets of glass could not be separated from the remainder of the panel by hand. This glass panel is also more resistant to damage by mechanical shock than an unlaminated glass panel and, even when the shock was so severe that the glass in the panel cracked, fragments of glass could not be separated from the remainder of the panel by hand.
WHATI CLAIM IS:- 1. A glass panel comprising two sheets of glass sandwiched together with a sheet of foamed plastics material bonded therebetween, one of the sheets of glass having a decorative or light reflecting coating applied to its inner face and having a protective coating between the decorative or light reflecting coating and the foamed plastics sheet.
2. A glass panel according to claim 1 in which the protective coating is formed by a double layer, a first layer of copper against the decorative or light reflecting coating and a second layer of red lead based or other protective paint between the layer of copper and the foamed plastics layer.
3. A glass panel according to claim 1 or 2, in which the foamed piastics material has a thickness within a range of 0.5 mm to 1.5 mm.
4. A glass panel according to claim 3, in which the thickness of the foamed plastics material is substantially 1.0 mm.
5. A glass panel according to any one of the preceding claims, in which both faces of
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (10)

**WARNING** start of CLMS field may overlap end of DESC **. ride having a hardness within the range of 55 to 65 on the Shore hardness 00 scale and a density between 0.19 and 0.26 g per cc. INSEAL Sealant 5250 (Registered Trademark) manufactured by Industrial Sealants Limited is particularly effective as the foamed plastics material. To produce a glass panel in accordance with this invention the decorative or light reflecting coating is applied to a sheet of glass then this coating is covered with a protective copper layer using conventional techniques. A red lead based or other protective paint is then applied to the copper layer using conventional techniques and apparatus including mechanical rollers to provide an even and uniform coating. The pressure sensitive adhesive coated plastics material is then carefully placed on to the paint backing to exclude as much air as possible and ensure good contact between the foam plastics sheet and the protective layer of paint. Finally the second sheet of glass is brought into contact with the other surface of the plastics sheets, again whilst as much air as possible is excluded. The laminated sheets are then rolled with a heavy roller to ensure that a good contact is achieved between both sheets of glass and the foamed plastics sheet. The completed laminate is then left for a period of time from 12 hours to 48 hours and usually about 24 hours. The laminate is then squeezed as it is passed through nips between two pairs of rollers before being placed in a heating chamber where it is heated to an elevated temperature which may be as high as 4000C. After this temperature treatment the laminate is preferably conditioned by a further storage period of up to 48 hours. A particular example of a glass panel in accordance with this invention will now be described with reference to the accompanying drawing which is a cross-section through a panel with the thickness of the panel greatly exaggerated. The glass panel in accordance with this invention is made by applying a decorative or light reflecting coating 1 to one side of the sheet of glass 2 and the decorative or light reflecting coating 1 is covered by a protective layer of copper 3, using conventional techniques. A red lead based paint 4 is then rolled onto the outside of the copper layer 3 to provide a uniform and even coating over the layer 3. A sheet of foamed plastics material 5 heaving pressure sensitive adhesive coatings 6 and 7 applied to its opposite faces is then applied to the outside of the red lead based paint 4. The sheet of foamed plastics material is Inseal Sealant 5250 (Registered Trade Mark) manufactured by Industrial Sealants Limited having a thickness of 1.0 mm. The sheet 5 is carefully placed onto the paint 4 excluding as much air as possible to ensure a good contact between the adhesive coating 6 and the paint 4. Finally a second sheet of glass 8 is brought into contact with the adhesive coating 7 on the other surface of the sheet 5 whilst, once again, as much air as possible is excluded. The laminate is then rolled with a heavy rcller to ensure that as good a contact as possible is achieved between the adhesive coating 6 and 7 and the sheets of glass 2 and 8. The laminate is then left for about 24 hours before being squeezed as it is passed through nips between two pairs of rollers and placed in a heating chamber where it is heated to a temperature of approximately 4000 C. After this heat treatment the laminate is then conditioned by a further storage period of 48 hours before use. Tests on the resulting glass panel have shown that when it is suspended horizontally with the urface unsupported except at its edges, the panel can withstand temperatures of substantially 18000C for 3+ hours without any separation of fragments of glass occuring. During the tests both sheets of glass have cracked and the foamed plastics material 5 between the sheets of glass appeared to char but the splintered fragments of the sheets of glass could not be separated from the remainder of the panel by hand. This glass panel is also more resistant to damage by mechanical shock than an unlaminated glass panel and, even when the shock was so severe that the glass in the panel cracked, fragments of glass could not be separated from the remainder of the panel by hand. WHATI CLAIM IS:-
1. A glass panel comprising two sheets of glass sandwiched together with a sheet of foamed plastics material bonded therebetween, one of the sheets of glass having a decorative or light reflecting coating applied to its inner face and having a protective coating between the decorative or light reflecting coating and the foamed plastics sheet.
2. A glass panel according to claim 1 in which the protective coating is formed by a double layer, a first layer of copper against the decorative or light reflecting coating and a second layer of red lead based or other protective paint between the layer of copper and the foamed plastics layer.
3. A glass panel according to claim 1 or 2, in which the foamed piastics material has a thickness within a range of 0.5 mm to 1.5 mm.
4. A glass panel according to claim 3, in which the thickness of the foamed plastics material is substantially 1.0 mm.
5. A glass panel according to any one of the preceding claims, in which both faces of
the foamed plastics material are coated with a high tack, high shear, pressure sensitive adhesive to create the bond between the two sheets of glass and the foamed plastics material.
6. A glass panel according to any one of the preceding claims, in which the foamed plastics material is made from plasiticed polyvinyl chloride having a hardness within the range of 55 to 65 on the Shore hardness 00 scale and a density between 0.19 and 0.26 g per cc.
7. A method of making a glass panel according to claim 5, comprising covering one glass sheet with a decorative or light reflecting coating, covering the decorative or light reflecting coating with a protective copper layer, applying red lead based or other protective paint to the copper layer using mechanical rollers to provide an even and uniform coating, placing the pressure sensitive adhesive coated foam plastics material on to the paint backing excluding as much air as possible to ensure good contact between the foam plastics sheet and the protective layer of paint, bringing the second sheet of glass into contact with the other surface of the plastic sheet, again whilst excluding as much air as possible, rolling the laminated sheets to ensure that a good contact is achieved between both sheets of glass and the foamed plastics sheet, passing the completed laminate between nips of two pairs of rollers, snd then placing the laminate in a heating chamber in which it is heated.
8. A method according to claim 7, in which the laminate is conditioned by a further storage period of up to 48 hours after the heating step.
9. A method according to claim 7 or 8, in which the laminate is heated to a temperature of substantially 4000C.
10. A glass panel according to claim 1, constructed substantially as described with reference to the accompanying drawing.
GB28797/77A 1978-05-19 1978-05-19 Glass panels Expired GB1578074A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB28797/77A GB1578074A (en) 1978-05-19 1978-05-19 Glass panels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB28797/77A GB1578074A (en) 1978-05-19 1978-05-19 Glass panels

Publications (1)

Publication Number Publication Date
GB1578074A true GB1578074A (en) 1980-10-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB28797/77A Expired GB1578074A (en) 1978-05-19 1978-05-19 Glass panels

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Country Link
GB (1) GB1578074A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3214853A1 (en) * 1981-04-24 1982-12-16 Glaverbel LAYERED REFLECTION PANEL
US4698278A (en) * 1985-10-21 1987-10-06 Alliance Pentagon A/S Three-layer laminated panel and method for production
FR2975195A1 (en) * 2011-05-10 2012-11-16 Saint Gobain MIRROR WITH FINE GLASS SHEET
US10551590B2 (en) 2013-02-28 2020-02-04 Corning Incorporated Glass mirror apparatus and methods of manufacturing a glass mirror apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3214853A1 (en) * 1981-04-24 1982-12-16 Glaverbel LAYERED REFLECTION PANEL
US4511618A (en) * 1981-04-24 1985-04-16 Glaverbel Laminated reflective panels
US4698278A (en) * 1985-10-21 1987-10-06 Alliance Pentagon A/S Three-layer laminated panel and method for production
FR2975195A1 (en) * 2011-05-10 2012-11-16 Saint Gobain MIRROR WITH FINE GLASS SHEET
WO2012153051A3 (en) * 2011-05-10 2013-01-03 Saint-Gobain Glass France Mirror comprising a thin sheet of glass
US10551590B2 (en) 2013-02-28 2020-02-04 Corning Incorporated Glass mirror apparatus and methods of manufacturing a glass mirror apparatus

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee
728C Application made for restoration (sect. 28/1977)
728R Application refused (sect. 28/1977)