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WO2017196179A1 - A mirror comprising a glass laminate and a method for manufacturing same - Google Patents

A mirror comprising a glass laminate and a method for manufacturing same Download PDF

Info

Publication number
WO2017196179A1
WO2017196179A1 PCT/NL2017/050303 NL2017050303W WO2017196179A1 WO 2017196179 A1 WO2017196179 A1 WO 2017196179A1 NL 2017050303 W NL2017050303 W NL 2017050303W WO 2017196179 A1 WO2017196179 A1 WO 2017196179A1
Authority
WO
WIPO (PCT)
Prior art keywords
mirror
glass substrate
plastic sheet
glass
thickness
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.)
Ceased
Application number
PCT/NL2017/050303
Other languages
French (fr)
Inventor
Frans VAN HAPERT
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.)
Air-Craftglass Inc
Original Assignee
Air-Craftglass Inc
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
Family has litigation
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Application filed by Air-Craftglass Inc filed Critical Air-Craftglass Inc
Publication of WO2017196179A1 publication Critical patent/WO2017196179A1/en
Anticipated expiration legal-status Critical
Ceased 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
    • B32B17/10009—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
    • B32B17/10018—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 only one 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
    • B32B17/10009—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
    • 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
    • B32B17/10128—Treatment of at least one glass sheet
    • B32B17/10137—Chemical strengthening
    • 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
    • B32B17/1022—Metallic coatings
    • 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
    • B32B17/10779—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 polyester
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings

Definitions

  • the present invention relates to a mirror comprising a glass substrate according to the preamble of claim 1.
  • mirrors comprising a backing layer of another substrate, for example a glass substrate, wherein the mirror and said other substrate are mutually coupled by a plastics layer ad ⁇ hering to both the mirror and the said substrate.
  • Tendency of most manufacturers is to manufacture a mirror with a long lasting dura ⁇ bility, which usually is obtained by using a relative thick glass substrate so as to prevent cracks and other damage due to long term failure.
  • An example of such mirror is known from EP0882997 where it is explicitly stated that glass substrates with signifi- cantly great thickness should be used to provide security in addi ⁇ tion to safety performance. Also, relatively thick finishes are applied so as to provide an optimum protection to the reflective material .
  • the glass substrate usually may also be covered with a plastic sheet at its other main surface, i.e. the surface directed away from the reflective material.
  • a plastic sheet at its other main surface, i.e. the surface directed away from the reflective material.
  • a negative result of such structure is that an impaired reflection rate is obtained.
  • mirrors according to the state of the art are relatively thick, especially when a safe product is to be obtained .
  • the invention aims at providing an improved mirror of the kind mentioned in the preamble.
  • the invention further aims at providing a mirror that can easily withstand shattering without obtaining an impaired reflec ⁇ tion .
  • the invention provides a mirror as mentioned in claim 1.
  • This mirror has the advantage that an optimum reflection is obtained whereas the mirror completely fulfils the requirements of safety. It has shown that the plastic sheet safely adheres to the glass sub- strate, such that no loose or flying glass particles are obtained.
  • the mirror according to the present invention has a very low weight, compared to mirrors that are man ⁇ ufactured according to the state of the art.
  • Such synergistic ef ⁇ fect is a surprising but advantageous effect.
  • the present mirror provides sufficient strength, contrary to the teachings of the state of the art.
  • a surprising effect is also found in the fact that the present mir ⁇ ror withstands high temperatures, such that it provides protection against flames. It even fulfills tests according to FAR/JAR/CS25 , App. F, Part 1 and JAR/FAR/CS25 , App F, Part IV. Tests also con ⁇ firm that the present mirror fulfills ball impact tests according to IEC 61965, applying masses of 260 grams and 535 grams. The glass substrates did not come of the plastics layer.
  • the mirror may be bent in many shapes.
  • the glass sub ⁇ strates and the plastic sheet may be bent before mutually connect ⁇ ing same before manufacturing the mirror according to the present invention.
  • a mirror with substantially any desired shape may be obtained.
  • the invention re ⁇ lates to a mirror, comprising a glass substrate with a reflective layer at a first main surface of said glass substrate and a pro ⁇ tective layer over said reflective layer for protecting said re ⁇ flective layer against degradation, wherein the mirror further comprises a plastic sheet adhered against said protective layer for providing protection against loose glass fragments on breakage of said glass substrate, wherein said plastic sheet is embodied as a double-sided adhesive sheet, a first adhesive side thereof to be adhered to the mirror and a second adhesive side thereof to be ad ⁇ hered to a substrate or another mirror, said double sided adhesive sheet providing protection against loose fragments on breakage of at least one of said glass substrates, characterized in that said glass substrate has a thickness of maximally 1.2 mm, and in that said plastic sheet has a thickness of between 0.06 and 0.15 mm.
  • the product according to the present invention therefore has numerous advantages compared to known mirrors and double sided mirrors.
  • double sided adhesive sheet means that the plastic sheet may be provided with an adhesive at its both sides, or that it may be manufactured from a material that is inherently adhe ⁇ sive .
  • the plastic sheet is made of a polymeric materi ⁇ al, preferably a non-flammable material.
  • the polymeric material provides a strong intermediate layer between said substrates.
  • a nonflammable material it is possible to use the mirror in airplanes and other areas where fire prevention is important.
  • An excellent adherence is obtained if the plastic sheet is adhered to said protective layer by means of a pressure sensitive adhesive.
  • an adhesive layer on said plastic sheet that allows one to apply a generally used soap mixture for coupling said sheet to said protective layer, as known in the art of apply- ing plastic sheet to a substrate, can be advantageously used.
  • An additional advantage of the present mirror is its low weight, which adds the advantage that the mirror will not lose its align ⁇ ment on a wall after application thereof by means of the soap method .
  • a preferred adhesive comprises an acrylic resin, preferably a pressure sensitive adhesive.
  • the plastic sheet is em ⁇ bodied as a double-sided adhesive sheet.
  • a first adhesive side of said sheet is to be adhered to the mirror and a second adhesive side of said sheet is to be adhered to a substrate or a back side of another mirror. Due to the protective characteristics of a plastic sheet, said double sided adhesive sheet providing protection against loose fragments on breakage of at least one of said glass substrates.
  • the plastic sheet is applied at the backside of the mirror (which is the side that is directed away from a user looking into the mirror) no loose glass fragments will be obtained when the mirror is broken.
  • said glass substrate has a thickness of maximally 1.2 mm, preferably less than 1.2 mm, more preferably less than 0.7 mm.
  • a thickness of 1.1 mm has particular advantage, since this combines high strength with a low weight and high bending properties .
  • a mirror with a high strength against breakage is obtained when said glass substrate comprises an aluminosilicate glass, preferably a chemically hardened aluminosilicate glass.
  • a combination of a reduced thickness as mentioned above and a chemically hardened aluminosilicate glass is highly preferred for obtaining advantageous results for use in an air ⁇ plane and other areas where fire prevention is important.
  • plastic sheet is a polyester sheet.
  • other materials may be used as well, but especially for fire-sensitive applications a polyester sheet is preferred .
  • the plastic sheet preferably has a thickness of between 0.06 and 0.15 mm, preferably from 0.10 - 0.13 mm, for example 0.127 mm, since such thickness provides optimal results in terms of strength and resistance against breakage. Sheets having other dimensions have shown to provide less strength (when thinner) or less flexibility (when thicker) .
  • An optimum thickness as stated above pro ⁇ vides an optimum combination and hence optimum applicability.
  • the clarity of the mirror is without competi ⁇ tion, since no obstruction is obtained whatsoever, contrary to the mirrors according to the state of the art where a plastic sheet is placed at the view side for providing protection against shattered glass pieces.
  • a double sided mirror thus preferably may have a thickness of about 2.3 mm to 2.5 mm, more in particular 2.327 mm in case of a glass substrate thickness of 1.1 mm and a plastic sheet thickness of 0.127 mm .
  • the thickness of the reflective layer and the thickness of its protective layer are incorporated in the glass substrate's thick- ness.
  • the present invention re ⁇ lates to a method for manufacturing a mirror according to the present invention and as described in any of claims 1 - 8, comprising the steps of providing a main surface at a first side of a glass substrate with a reflective layer and a protective layer for said reflective layer.
  • This method is characterized in that the method further comprises the step of adhering a first side of a double- sided adhesive plastic sheet against said first side of said glass substrate for protecting the said coated glass substrate against loose fragments when damaging said glass substrate, further com ⁇ prising the step of adhering the second side of said double-sided adhesive plastic sheet to another substrate. Due to the plastic sheet, an excellent protection against loose fragments is obtained whereas still the clarity of the mirror is optimal since the light path for viewing in the mirror is not obstructed.
  • the method comprises the step of applying aluminosilicate glass, chem ⁇ ically hardened aluminosilicate glass as said glass substrate.
  • the materials known in the art may be used.
  • the plastic sheet surpris ⁇ ingly provides an excellent protection against loose fragments, as mentioned before.
  • a double-sided mirror may be obtained when using a double-sided adhesion sheet, by perform ⁇ ing the step of adhering said plastic sheet against a first side of a first mirror and against a first side of a second mirror.
  • the plastic sheet preferably is a sheet that at both main surfaces comprises an adhesive that allows a user to wet the surface to which the sheet is to be applied and apply said sheet. As long as sufficient moisture is present, the sheet may be aligned. After removing the liquid by using a doctor blade or the like, the adhe- sive provides for adhesion.
  • said second side of said plastic sheet is adhered to a phenol material substrate, preferably an aviation grade phenol material. Then, the advantages of the present inven ⁇ tion are clearly shown, amongst which its low weight and fire re- sistance.
  • the method comprises the step of applying a first main surface of the sheet to a first side of a glass substrate that has been provided with a reflective lay ⁇ er and a protective coating, said glass substrate having a thick- ness of maximally about 1.2 mm, preferably maximally 0.7 mm, and subsequently applying the other main surface of the sheet to a first side of another glass substrate that has been provided with a reflective layer and a protective coating.
  • both glass substrates have a thickness of maximally 1.2 mm, preferably less than 0.7 mm.
  • the other glass substrates has a thickness of less than 0.7 mm, since such glass substrate has sufficient flexibility for bending same when applying said other glass substrate to the other main surface of the sheet.
  • the plastic sheet is a dou- ble-sided adhesive sheet, since such eases coupling the mirror to another substrate, for example a wall, a door, or any other surface, or even to the back side of another mirror, as indicated above .
  • the glass substrates of said mirrors have a thickness of less than 1.2 mm, preferably a thick ⁇ ness of less than 0.7 mm, more preferably maximally 0.6 mm.
  • Fig. 1 a schematic section of a first embodiment of a mirror according to the invention
  • Fig. 2 a schematic section of a second embodiment of a mirror according to the invention.
  • Fig. 1 shows a schematic section of a mirror 1 according to a first embodiment of the present invention.
  • the mirror 1 comprises of a glass substrate 2.
  • a reflective layer 4 is applied to a first main surface 3 of said glass substrate 2.
  • This reflective lay ⁇ er is a metal layer. Suitable metals are, for example, silver and aluminum. Silver is most preferred due to its unique reflective characteristics.
  • a protective layer 5 is applied on top of the reflec ⁇ tive layer 4.
  • Such protective layer 5 is known in the art and usu ⁇ ally comprises two separate layers (not shown) that as a combina- tion provide an excellent adhesion to said reflective layer 4.
  • the combination as mentioned above is provided with a plastic sheet 7 at a first main surface 6 of the protective layer 5.
  • the plastic sheet 7 is embodied as a self-adhesive sheet such that an easy applica- tion is provided.
  • the sheet 7 is preferably made of a polyester material which provides excellent tear strength. As a consequence, no loose glass fragments are obtained when the glass substrate is damaged. Other suitable materials may be used as well.
  • the plastic sheet 7 may be a double-sided adhesive sheet. Such allows one to adhere the mirror to a substrate like a wall, a door or any other surface.
  • Fig. 2 indicates a preferred embodiment wherein the mirror 1 is provided with a double-sided adhesive sheet 1' which is adhered to another mirror 8, comprising a glass substrate 10, a reflective layer 11 and a protective layer 12.
  • a double-sided mirror 9 is obtained, comprising a first mirror 1' and a second mirror 8, connected through a double-sided adhesive sheet 7'.
  • the invention also relates to all combinations of features described here independently of each other.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Laminated Bodies (AREA)
  • Mirrors, Picture Frames, Photograph Stands, And Related Fastening Devices (AREA)

Abstract

The invention relates to a mirror, comprising a glass substrate with a reflective layer at a first main surface of said glass substrate and a protective layer over said reflective layer for protecting said reflective layer against degradation. The mirror further comprises a plastic sheet adhered against said protective layer. Herewith a protection against loose glass fragments on breakage of said glass substrate is obtained. The invention also relates to a method for manufacturing such mirror.

Description

A MIRROR COMPRISING A GLASS LAMINATE AND A METHOD FOR MANUFACTURING SAME
The present invention relates to a mirror comprising a glass substrate according to the preamble of claim 1.
It is known in the art to manufacture mirrors from glass by covering a main surface thereof with a metal layer or any other suitable material so as to obtain a reflective surface. As a gen¬ eral rule, the back side of the glass surface, from the perspec¬ tive of the viewer, is the reflective surface. So as to protect the reflective layer from degradation, same is covered with a finish .
Such known mirrors provide visually attractive products.
Also known are mirrors comprising a backing layer of another substrate, for example a glass substrate, wherein the mirror and said other substrate are mutually coupled by a plastics layer ad¬ hering to both the mirror and the said substrate. Tendency of most manufacturers is to manufacture a mirror with a long lasting dura¬ bility, which usually is obtained by using a relative thick glass substrate so as to prevent cracks and other damage due to long term failure. An example of such mirror is known from EP0882997 where it is explicitly stated that glass substrates with signifi- cantly great thickness should be used to provide security in addi¬ tion to safety performance. Also, relatively thick finishes are applied so as to provide an optimum protection to the reflective material .
If a resistance against shattering is to be obtained, the glass substrate usually may also be covered with a plastic sheet at its other main surface, i.e. the surface directed away from the reflective material. A negative result of such structure is that an impaired reflection rate is obtained. As another disadvantage it should be mentioned that mirrors according to the state of the art are relatively thick, especially when a safe product is to be obtained .
The invention aims at providing an improved mirror of the kind mentioned in the preamble.
The invention further aims at providing a mirror that can easily withstand shattering without obtaining an impaired reflec¬ tion .
So as to obtain at least one of the above mentioned aims, the invention provides a mirror as mentioned in claim 1. This mirror has the advantage that an optimum reflection is obtained whereas the mirror completely fulfils the requirements of safety. It has shown that the plastic sheet safely adheres to the glass sub- strate, such that no loose or flying glass particles are obtained.
It has also shown that the mirror according to the present invention has a very low weight, compared to mirrors that are man¬ ufactured according to the state of the art. Such synergistic ef¬ fect is a surprising but advantageous effect.
It is surprising that the present mirror provides sufficient strength, contrary to the teachings of the state of the art. A surprising effect is also found in the fact that the present mir¬ ror withstands high temperatures, such that it provides protection against flames. It even fulfills tests according to FAR/JAR/CS25 , App. F, Part 1 and JAR/FAR/CS25 , App F, Part IV. Tests also con¬ firm that the present mirror fulfills ball impact tests according to IEC 61965, applying masses of 260 grams and 535 grams. The glass substrates did not come of the plastics layer.
Another effect is the present mirror's flexibility. As a re- suit, the mirror may be bent in many shapes. Also, the glass sub¬ strates and the plastic sheet may be bent before mutually connect¬ ing same before manufacturing the mirror according to the present invention. As a result, a mirror with substantially any desired shape may be obtained.
Therefore, according to a first embodiment, the invention re¬ lates to a mirror, comprising a glass substrate with a reflective layer at a first main surface of said glass substrate and a pro¬ tective layer over said reflective layer for protecting said re¬ flective layer against degradation, wherein the mirror further comprises a plastic sheet adhered against said protective layer for providing protection against loose glass fragments on breakage of said glass substrate, wherein said plastic sheet is embodied as a double-sided adhesive sheet, a first adhesive side thereof to be adhered to the mirror and a second adhesive side thereof to be ad¬ hered to a substrate or another mirror, said double sided adhesive sheet providing protection against loose fragments on breakage of at least one of said glass substrates, characterized in that said glass substrate has a thickness of maximally 1.2 mm, and in that said plastic sheet has a thickness of between 0.06 and 0.15 mm.
The product according to the present invention therefore has numerous advantages compared to known mirrors and double sided mirrors.
The term "double sided adhesive sheet" means that the plastic sheet may be provided with an adhesive at its both sides, or that it may be manufactured from a material that is inherently adhe¬ sive .
According to a preferred embodiment, in the mirror according to the invention, the plastic sheet is made of a polymeric materi¬ al, preferably a non-flammable material. The polymeric material provides a strong intermediate layer between said substrates. In case of a nonflammable material, it is possible to use the mirror in airplanes and other areas where fire prevention is important. An additional advantage of the mirror according to the present in¬ vention that provides a huge advantage when used in airplanes over mirrors according to the state of the art is that the present mir¬ ror's weight is considerably lower than that of the known mirrors.
An excellent adherence is obtained if the plastic sheet is adhered to said protective layer by means of a pressure sensitive adhesive. Especially an adhesive layer on said plastic sheet that allows one to apply a generally used soap mixture for coupling said sheet to said protective layer, as known in the art of apply- ing plastic sheet to a substrate, can be advantageously used. An additional advantage of the present mirror is its low weight, which adds the advantage that the mirror will not lose its align¬ ment on a wall after application thereof by means of the soap method .
A preferred adhesive comprises an acrylic resin, preferably a pressure sensitive adhesive. Such adhesive allows a further en¬ hanced adhesion after application. According to a further embodiment, the plastic sheet is em¬ bodied as a double-sided adhesive sheet. In such embodiment, a first adhesive side of said sheet is to be adhered to the mirror and a second adhesive side of said sheet is to be adhered to a substrate or a back side of another mirror. Due to the protective characteristics of a plastic sheet, said double sided adhesive sheet providing protection against loose fragments on breakage of at least one of said glass substrates. However, since the plastic sheet is applied at the backside of the mirror (which is the side that is directed away from a user looking into the mirror) no loose glass fragments will be obtained when the mirror is broken.
So as to obtain a weight as low as possible, it is preferred that said glass substrate has a thickness of maximally 1.2 mm, preferably less than 1.2 mm, more preferably less than 0.7 mm. A thickness of 1.1 mm has particular advantage, since this combines high strength with a low weight and high bending properties .
A mirror with a high strength against breakage is obtained when said glass substrate comprises an aluminosilicate glass, preferably a chemically hardened aluminosilicate glass. As a mat- ter of fact, a combination of a reduced thickness as mentioned above and a chemically hardened aluminosilicate glass is highly preferred for obtaining advantageous results for use in an air¬ plane and other areas where fire prevention is important.
A strong embodiment is obtained when the plastic sheet is a polyester sheet. However, other materials may be used as well, but especially for fire-sensitive applications a polyester sheet is preferred .
The plastic sheet preferably has a thickness of between 0.06 and 0.15 mm, preferably from 0.10 - 0.13 mm, for example 0.127 mm, since such thickness provides optimal results in terms of strength and resistance against breakage. Sheets having other dimensions have shown to provide less strength (when thinner) or less flexibility (when thicker) . An optimum thickness as stated above pro¬ vides an optimum combination and hence optimum applicability. In addition to that, the clarity of the mirror is without competi¬ tion, since no obstruction is obtained whatsoever, contrary to the mirrors according to the state of the art where a plastic sheet is placed at the view side for providing protection against shattered glass pieces.
A double sided mirror thus preferably may have a thickness of about 2.3 mm to 2.5 mm, more in particular 2.327 mm in case of a glass substrate thickness of 1.1 mm and a plastic sheet thickness of 0.127 mm .
As a matter of fact, where applicable in this description, the thickness of the reflective layer and the thickness of its protective layer are incorporated in the glass substrate's thick- ness.
According to another embodiment, the present invention re¬ lates to a method for manufacturing a mirror according to the present invention and as described in any of claims 1 - 8, comprising the steps of providing a main surface at a first side of a glass substrate with a reflective layer and a protective layer for said reflective layer. This method is characterized in that the method further comprises the step of adhering a first side of a double- sided adhesive plastic sheet against said first side of said glass substrate for protecting the said coated glass substrate against loose fragments when damaging said glass substrate, further com¬ prising the step of adhering the second side of said double-sided adhesive plastic sheet to another substrate. Due to the plastic sheet, an excellent protection against loose fragments is obtained whereas still the clarity of the mirror is optimal since the light path for viewing in the mirror is not obstructed.
According to a preferred embodiment for obtaining a durable mirror that can be manufactured with thin glass substrates, the method comprises the step of applying aluminosilicate glass, chem¬ ically hardened aluminosilicate glass as said glass substrate. As a surprise, the adhesion of the reflective layer to the glass is very good, which was not expected since the behavior of alumino¬ silicate glass is different from the usually applied soda lime glass. The reflective layer may be made of silver or aluminum (most preferably silver), as known in the art. As a matter of fact, a mercury layer may be used as well, as far as legislation allows such mirrors to be used. Also, the adhesion of the reflec¬ tive layer and the coating for protecting the reflective layer against degradation, like oxidation or deterioration due to liquid and humidity, extremely well. As a coating, the materials known in the art may be used. As a consequence, the plastic sheet surpris¬ ingly provides an excellent protection against loose fragments, as mentioned before.
According to a special embodiment, a double-sided mirror may be obtained when using a double-sided adhesion sheet, by perform¬ ing the step of adhering said plastic sheet against a first side of a first mirror and against a first side of a second mirror. The plastic sheet preferably is a sheet that at both main surfaces comprises an adhesive that allows a user to wet the surface to which the sheet is to be applied and apply said sheet. As long as sufficient moisture is present, the sheet may be aligned. After removing the liquid by using a doctor blade or the like, the adhe- sive provides for adhesion.
It is preferred that said second side of said plastic sheet is adhered to a phenol material substrate, preferably an aviation grade phenol material. Then, the advantages of the present inven¬ tion are clearly shown, amongst which its low weight and fire re- sistance.
According to a preferred embodiment, the method comprises the step of applying a first main surface of the sheet to a first side of a glass substrate that has been provided with a reflective lay¬ er and a protective coating, said glass substrate having a thick- ness of maximally about 1.2 mm, preferably maximally 0.7 mm, and subsequently applying the other main surface of the sheet to a first side of another glass substrate that has been provided with a reflective layer and a protective coating. Most preferably, both glass substrates have a thickness of maximally 1.2 mm, preferably less than 0.7 mm. Most preferably, the other glass substrates has a thickness of less than 0.7 mm, since such glass substrate has sufficient flexibility for bending same when applying said other glass substrate to the other main surface of the sheet.
It is especially preferred that the plastic sheet is a dou- ble-sided adhesive sheet, since such eases coupling the mirror to another substrate, for example a wall, a door, or any other surface, or even to the back side of another mirror, as indicated above .
It is therefore preferred that the glass substrates of said mirrors have a thickness of less than 1.2 mm, preferably a thick¬ ness of less than 0.7 mm, more preferably maximally 0.6 mm.
Hereafter, the invention will be further described by means of a drawing. The drawing shows in:
Fig. 1 a schematic section of a first embodiment of a mirror according to the invention,
Fig. 2 a schematic section of a second embodiment of a mirror according to the invention.
The same and similar parts and features have been denoted by the same reference numerals in the figures. However, for ease of understanding the figures, not all parts that are required for a practical embodiment have been shown in the figures.
Fig. 1 shows a schematic section of a mirror 1 according to a first embodiment of the present invention. The mirror 1 comprises of a glass substrate 2. To a first main surface 3 of said glass substrate 2, a reflective layer 4 is applied. This reflective lay¬ er is a metal layer. Suitable metals are, for example, silver and aluminum. Silver is most preferred due to its unique reflective characteristics. So as to protect the reflective layer 4 against degradation, a protective layer 5 is applied on top of the reflec¬ tive layer 4. Such protective layer 5 is known in the art and usu¬ ally comprises two separate layers (not shown) that as a combina- tion provide an excellent adhesion to said reflective layer 4.
So as to be able to obtain a safe mirror, the combination as mentioned above is provided with a plastic sheet 7 at a first main surface 6 of the protective layer 5. Preferably, the plastic sheet 7 is embodied as a self-adhesive sheet such that an easy applica- tion is provided. The sheet 7 is preferably made of a polyester material which provides excellent tear strength. As a consequence, no loose glass fragments are obtained when the glass substrate is damaged. Other suitable materials may be used as well.
The plastic sheet 7 may be a double-sided adhesive sheet. Such allows one to adhere the mirror to a substrate like a wall, a door or any other surface.
Fig. 2 indicates a preferred embodiment wherein the mirror 1 is provided with a double-sided adhesive sheet 1' which is adhered to another mirror 8, comprising a glass substrate 10, a reflective layer 11 and a protective layer 12. As such, a double-sided mirror 9 is obtained, comprising a first mirror 1' and a second mirror 8, connected through a double-sided adhesive sheet 7'. When any of the glass substrates 2, 10 is shattered, no loose glass fragments are obtained, since the plastic sheet 1' holds the glass fragments tightly .
The invention is not limited to the embodiments as mentioned above and as shown in the drawings. The invention is limited by the claims only.
The invention also relates to all combinations of features described here independently of each other.

Claims

C L A I M S
1. A mirror, comprising a glass substrate with a reflective layer at a first main surface of said glass substrate and a protective layer over said reflective layer for protecting said reflective layer against degradation, wherein the mirror further comprises a plastic sheet adhered against said protective layer for providing protection against loose glass fragments on breakage of said glass substrate, wherein said plastic sheet is embodied as a double- sided adhesive sheet, a first adhesive side thereof to be adhered to said protective layer and a second adhesive side thereof to be adhered to another substrate, said double sided adhesive sheet providing protection against loose fragments on breakage of at least one of said substrates, characterized in that said glass substrate has a thickness of maximally 1.2 mm, and in that said plastic sheet has a thickness of between 0.06 and 0.15 mm.
2. A mirror according to claim 1, wherein said plastic sheet is made of a polymeric material, preferably a non-flammable material.
3. A mirror according to claim 1, wherein said plastic sheet is adhered to said protective layer by means of a pressure sensitive adhesive .
4. A mirror according to claim 1, wherein said adhesive comprises an acrylic resin, preferably a pressure sensitive adhesive.
5. A mirror according to claim 1, wherein said glass substrate has a thickness of less than 1.2 mm, preferably less than 0.7 mm.
6. A mirror according to claim 1, wherein said glass substrate comprises an aluminosilicate glass, preferably a chemically hard¬ ened aluminosilicate glass.
7. A mirror according to claim 1, wherein the plastic sheet is a polyester sheet.
8. A mirror according to any claim 1, wherein said plastic sheet has a thickness of 0.10 - 0.13 mm.
5 9. A method for manufacturing a mirror according to any of claims 1 - 8, comprising the steps of providing a main surface at a first side of a glass substrate with a reflective layer and a protective layer for said reflective layer, characterized in that the method further comprises the step of adhering a first side of a double- 10 sided adhesive plastic sheet against said first side of said glass substrate for protecting the said coated glass substrate against loose fragments when damaging said glass substrate, further com¬ prising the step of adhering the second side of said double-sided adhesive plastic sheet to another substrate.
15
10. A method according to claim 9, comprising the step of applying aluminosilicate glass or chemically hardened aluminosilicate glass as said glass substrate.
20 11. A method according to claim 9, comprising the step of manufac¬ turing a double-sided mirror, characterized in that the method comprises the step of adhering said plastic sheet against a first side of a first mirror and against a first side of a second mir¬ ror .
25
12. A method according to claim 9, wherein said second side of said plastic sheet is adhered to a phenol material substrate, preferably an aviation grade phenol material, or to another glass substrate, preferably to a side of a mirror comprising a protec-
30 tive layer.
13. A method according to claim 11, wherein the glass substrate of said mirror has a thickness of less than 1.2 mm, preferably a thickness of less than 0.7 mm, more preferably maximally 0.6 mm.
PCT/NL2017/050303 2016-05-13 2017-05-15 A mirror comprising a glass laminate and a method for manufacturing same Ceased WO2017196179A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2016772 2016-05-13
NL2016772A NL2016772B1 (en) 2016-05-13 2016-05-13 A mirror comprising a glass laminate and a method for manufacturing same

Publications (1)

Publication Number Publication Date
WO2017196179A1 true WO2017196179A1 (en) 2017-11-16

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NL (1) NL2016772B1 (en)
WO (1) WO2017196179A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1885232A (en) * 1930-10-20 1932-11-01 Duplate Corp Mirror
DE2406891A1 (en) * 1973-02-15 1974-08-22 Canon Kk MIRROR
EP0882997A1 (en) 1997-06-06 1998-12-09 Globe-Amerada Glass Company Laminated safety mirror with reflective coating adjacent the bonding layer
WO2013088055A1 (en) * 2011-12-16 2013-06-20 Saint-Gobain Glass France Mirror comprising a polymer based add-on film
US20130208375A1 (en) * 2011-12-28 2013-08-15 Guardian Industries Corp. Mirror and methods of making the same
WO2014134114A1 (en) * 2013-02-28 2014-09-04 Corning Incorporated Glass mirror apparatus and methods of manufacturing a glass mirror apparatus
WO2014168481A1 (en) * 2013-04-11 2014-10-16 Aviation Glass & Technology B.V. Vehicle mirror, and method for manufacturing such a mirror

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1885232A (en) * 1930-10-20 1932-11-01 Duplate Corp Mirror
DE2406891A1 (en) * 1973-02-15 1974-08-22 Canon Kk MIRROR
EP0882997A1 (en) 1997-06-06 1998-12-09 Globe-Amerada Glass Company Laminated safety mirror with reflective coating adjacent the bonding layer
WO2013088055A1 (en) * 2011-12-16 2013-06-20 Saint-Gobain Glass France Mirror comprising a polymer based add-on film
US20130208375A1 (en) * 2011-12-28 2013-08-15 Guardian Industries Corp. Mirror and methods of making the same
WO2014134114A1 (en) * 2013-02-28 2014-09-04 Corning Incorporated Glass mirror apparatus and methods of manufacturing a glass mirror apparatus
WO2014168481A1 (en) * 2013-04-11 2014-10-16 Aviation Glass & Technology B.V. Vehicle mirror, and method for manufacturing such a mirror

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