GB2048166A - Mirrors - Google Patents

Mirrors Download PDF

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Publication number
GB2048166A
GB2048166A GB8010339A GB8010339A GB2048166A GB 2048166 A GB2048166 A GB 2048166A GB 8010339 A GB8010339 A GB 8010339A GB 8010339 A GB8010339 A GB 8010339A GB 2048166 A GB2048166 A GB 2048166A
Authority
GB
United Kingdom
Prior art keywords
layer
mirror
backing board
board
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.)
Granted
Application number
GB8010339A
Other versions
GB2048166B (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB8010339A priority Critical patent/GB2048166B/en
Publication of GB2048166A publication Critical patent/GB2048166A/en
Application granted granted Critical
Publication of GB2048166B publication Critical patent/GB2048166B/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
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B29/007—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a foam layer
    • 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
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • 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
    • B32B2266/0278—Polyurethane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption
    • 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
    • B32B2551/00—Optical elements
    • B32B2551/08—Mirrors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Laminated Bodies (AREA)

Abstract

In a mirror of the kind in which the transparent glass sheet 2 carrying the reflective layer 4 is laminated to a rigid backing board 14, 16, 18, the tendency to fracture due to the differing coefficients of thermal expansion of the transparent sheet and the backing board is reduced and the shock absorption characteristics are increased by interposing a flexible elastomeric layer 8 such as of plastics or rubber foam between the transparent glass sheet and the backing board. The backing board may comprise a rigid foam 14 sandwiched between facing layers 16, 18; stabilising layers 10, 12 of fabric may be included in the mirror. <IMAGE>

Description

SPECIFICATION Mirrors This invention relates to improvements in or relating to mirrors and especially mirrors in which the glass sheet carrying the layer of reflective material is laminated to a substantially rigid backing board.
It has been found that, particularly in large mirrors of this kind, that there is tendency for the product to fracture when exposed to an environment in which the temperature varies and that this is due to the differing thermal expansion coefficients of the glass and the backing board.
The present invention reduces or overcomes this defect.
According to the present invention, there is provided a mirror laminate comprising a transparent glass sheet a face of which is provided with a layer of reflective material, said sheet being bonded to a substantially rigid backing board with a flexible elastomeric layer interposed between the layer of reflective material and the backing board.
The flexible elastomeric layer may be bonded to the other components of the laminate by means of a suitable adhesive.
The flexible elastomeric layer interposed between the glass sheet and the backing board absorbs the stresses developed during heating or cooling of the product due to the different coefficients of expansion of the laminate and this reduces or prevents fracture due to heating or cooling of the mirror.
Further, where the glass is fractured, e.g. by impact, there is a reduced tendency to fragmentation because the fragments tend to remain bonded to the flexible layer. Improved properties are obtained in this respect where the transparent sheet is laminated glass.
The flexible elastomeric layer may be formed of a plastics material or a rubber which may be natural or synthetic. Where the flexible elastomeric layer is also resiliently compressible, e.g. as in a rubber or plastics foam, the product also has improved shock absorption characteristics and in particular increased ability to withstand a blow.
Examples of suitable flexible and resiliently compressible elastomeric foams are those marketed as DF 119 and DF 113 by Dunlop Ltd of England. An example of a suitable adhesive for bonding these foams to the other components of the laminate is SN 1 501 marketed by Dunlop Ltd.
A suitable thickness for the flexible layer is 0.1 to 0.15 inch (about 2 to 4 mm) although larger or smaller thicknesses may be used.
The substantially rigid backing board may be of any suitable material e.g. wood, plywood, chipboard, blockboard or plastics. Where the backing board is a plastics-faced laminate e.g. as in a melamine-faced chipboard, products which are particularly suitable for use in the production of furniture may be obtained. The plastics facing need only be on one face of the laminate, namely the face that remains exposed in the product from it but both faces may be of plastics, if desired.
Products which are of value as light weight mirrors can be obtained by employing substantially rigid foamed plastics boards as the backing boards, especially substantially rigid boards of foamed polyurethane or a foam based on isocyanurate polymer. To avoid accidental damage during handling, the foamed plastics board may be faced on the face which remains exposed in the product, or on both faces, with a protective sheet e.g. of thick paper or board or a film or sheet of plastics material. In one embodiment, one or both faces of the foamed plastics board is/are faced with metallised, e.g.
aluminated paper or board.
The mirror of the invention may be made in any suitable manner. Conveniently, the glass provided with the reflective layer, the backing board and the flexible elastomeric layer are separately preformed and then bonded together using a suitable adhesive. Where the elastomeric layer is preformed and is a rubber or plastics foam, it may be desirable to provide on at least one face of it a layer of material which will prevent it from stretching or otherwise deforming during the production of the mirror. The layer, hereinafter referred to as stabilising layer, may be of any suitable material e.g. flexible thermoplastics film or a textile e.g. of knitted or woven polyamide (nylon) or polyester. Preferably, the stabilising layer is provided on both faces of the elastomeric layer.
Where the stabilising layer is a textile material and is located between the reflective layer and the elastomeric layer in the resultant mirror, the tendency of the glass to fragment on shattering is reduced still further.
One example of a mirror according to the invention is illustrated in the accompanying drawing which is a perspective view partly cut away to illustrate more clearly the various component layers of the product. In the embodiment illustrated, the mirror comprises a 3mm thick transparent sheet 2 of laminated glass provided in conventional manner, e.g. by silvering and coppering, with a layer 4 of reflective material.
This is bonded e.g. by means of Dunlop SN 1 501 adhesive to a 3mm thick layer 8 of flexible foam plastics or rubber material, such as Dunlop DF 11 3 or Dunlop DF 1 19. This layer is provided on both faces thereof with stabilising layers 10, 12 each of which is a finely woven or knitted nylon mesh.
To the back of the layer 8 of flexible material is bonded, e.g. by means of Dunlop SN 1 501 adhesive, a rigid foamed polyurethane or isocyanurate board 14 which is approximately 20mm thick and is faced on both faces with a skin of aiuminised paper or board 16, 18.
The product is light in weight, being about half the weight of a conventional mirror made in 6mm plate glass, yet has greater strength and impact resistance. A steel hammer can be bounced on the surface without the mirror breaking and where breakage does occur the broken fragments tend to remain in place. It is particularly suitable for use as a wall cladding, especially when produced in large sizes, where its low weighilsurface area is particularly valuable.

Claims (9)

1. A mirror laminate comprising a transparent glass sheet a face of which is provided with a layer of reflective material, said sheet being bonded to a substantially rigid backing board with a flexible elastomeric layer interposed between the layer of reflective material and said backing board.
2. A mirror as claimed in Claim 1 in which the flexible elastomeric layer comprises a rubber or plastics foam.
3. A mirror as claimed in Claim 2 in which at least one face of the layer of the flexible elastomeric layer is provided with a stabilising layer.
4. A mirror as claimed in Claim 3 in which the stabilising layer is a textile.
5. A mirror as claimed in Claim 4 in which there is a stabilising layer between the layer of reflective material and the flexible elastomeric layer.
6. A mirror as claimed in any one of Claims 1 to 5 in which the backing board comprises a substantially rigid foamed plastics board.
7. A mirror as claimed in Claim 6 in which the backing board comprises foamed polyurethane or a foam based on isocyanurate polymer.
8. A mirror as claimed in Claim 7 in which at least the exposed face of the backing board is faced with metallised paper or board.
9. A mirror as claimed in Claim 1, substantially as hereinbefore described with particular reference to the accompanying drawing.
GB8010339A 1979-05-04 1980-03-27 Mirrors Expired GB2048166B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8010339A GB2048166B (en) 1979-05-04 1980-03-27 Mirrors

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7915589 1979-05-04
GB8010339A GB2048166B (en) 1979-05-04 1980-03-27 Mirrors

Publications (2)

Publication Number Publication Date
GB2048166A true GB2048166A (en) 1980-12-10
GB2048166B GB2048166B (en) 1984-01-25

Family

ID=26271408

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8010339A Expired GB2048166B (en) 1979-05-04 1980-03-27 Mirrors

Country Status (1)

Country Link
GB (1) GB2048166B (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3216844A1 (en) * 1981-08-21 1983-03-03 Glaverbel, 1170 Bruxelles COMPOSITE MIRROR ARRANGEMENT AND METHOD FOR THE PRODUCTION THEREOF
EP0099437A2 (en) * 1982-07-14 1984-02-01 Chelsea Artisans Limited Mirrors
FR2540999A1 (en) * 1983-02-11 1984-08-17 Creusot Loire Method and device for fixing a mirror onto a support
US4726860A (en) * 1984-03-12 1988-02-23 Chelsea Artisans Limited Method of making mirror laminates
US5089076A (en) * 1987-07-10 1992-02-18 Chelsea Artisans Plc Method of manufacturing article including melting thermosetting-powder
US5117343A (en) * 1990-06-19 1992-05-26 Siemens Aktiengesellschaft Reflector arrangement
US5330602A (en) * 1989-08-15 1994-07-19 Leach Roger J Manufacture of articles that include thermosetting powder coatings
US5337221A (en) * 1992-01-14 1994-08-09 Musco Corporation Means and method for highly controllable lighting
US5343374A (en) * 1992-01-14 1994-08-30 Musco Corporation Means and method for highly controllable lighting
US5519590A (en) * 1992-01-14 1996-05-21 Musco Corporation Means and method for highly controllable lighting
US5595440A (en) * 1992-01-14 1997-01-21 Musco Corporation Means and method for highly controllable lighting of areas or objects
US5647661A (en) * 1992-01-14 1997-07-15 Musco Corporation High efficiency, highly controllable lighting apparatus and method
WO2003067302A1 (en) * 2002-02-06 2003-08-14 Seos Limited Support structure for optical devices

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4465734A (en) * 1981-08-21 1984-08-14 Glaverbel Composite mirror panels
DE3216844A1 (en) * 1981-08-21 1983-03-03 Glaverbel, 1170 Bruxelles COMPOSITE MIRROR ARRANGEMENT AND METHOD FOR THE PRODUCTION THEREOF
EP0099437A2 (en) * 1982-07-14 1984-02-01 Chelsea Artisans Limited Mirrors
EP0099437A3 (en) * 1982-07-14 1984-10-24 Roger John Leach Mirrors
FR2540999A1 (en) * 1983-02-11 1984-08-17 Creusot Loire Method and device for fixing a mirror onto a support
US4726860A (en) * 1984-03-12 1988-02-23 Chelsea Artisans Limited Method of making mirror laminates
US4795521A (en) * 1984-03-12 1989-01-03 Chelsea Artisans Limited Apparatus for making mirror laminates
US5089076A (en) * 1987-07-10 1992-02-18 Chelsea Artisans Plc Method of manufacturing article including melting thermosetting-powder
US5330602A (en) * 1989-08-15 1994-07-19 Leach Roger J Manufacture of articles that include thermosetting powder coatings
US5117343A (en) * 1990-06-19 1992-05-26 Siemens Aktiengesellschaft Reflector arrangement
US5337221A (en) * 1992-01-14 1994-08-09 Musco Corporation Means and method for highly controllable lighting
US5343374A (en) * 1992-01-14 1994-08-30 Musco Corporation Means and method for highly controllable lighting
US5402327A (en) * 1992-01-14 1995-03-28 Musco Corporation Means and method for highly controllable lighting
US5519590A (en) * 1992-01-14 1996-05-21 Musco Corporation Means and method for highly controllable lighting
US5595440A (en) * 1992-01-14 1997-01-21 Musco Corporation Means and method for highly controllable lighting of areas or objects
US5647661A (en) * 1992-01-14 1997-07-15 Musco Corporation High efficiency, highly controllable lighting apparatus and method
US5906425A (en) * 1992-01-14 1999-05-25 Musco Corporation Means and method for highly controllable lighting of areas or objects
WO2003067302A1 (en) * 2002-02-06 2003-08-14 Seos Limited Support structure for optical devices

Also Published As

Publication number Publication date
GB2048166B (en) 1984-01-25

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19980327