EP0445118A1 - Verre a l'epreuve des balles - Google Patents

Verre a l'epreuve des balles

Info

Publication number
EP0445118A1
EP0445118A1 EP89908145A EP89908145A EP0445118A1 EP 0445118 A1 EP0445118 A1 EP 0445118A1 EP 89908145 A EP89908145 A EP 89908145A EP 89908145 A EP89908145 A EP 89908145A EP 0445118 A1 EP0445118 A1 EP 0445118A1
Authority
EP
European Patent Office
Prior art keywords
glass
sheet
film
sheets
mils
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.)
Withdrawn
Application number
EP89908145A
Other languages
German (de)
English (en)
Other versions
EP0445118A4 (en
Inventor
William Peter Stephinson
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
Publication of EP0445118A1 publication Critical patent/EP0445118A1/fr
Publication of EP0445118A4 publication Critical patent/EP0445118A4/en
Withdrawn legal-status Critical Current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
    • B32B17/10036—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
    • B32B17/10055—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 with at least one intermediate air space
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • 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
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
    • E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
    • E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
    • E06B5/12—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes against air pressure, explosion, or gas
    • 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

Definitions

  • This invention relates to an improvement in bullet resistant glass screens in particular for use in security applications.
  • Bullet proof glass comprises a laminate of generally heat treated annealed 394-472 mils (10-12 mm) glass sheets. For example, four sheets of this special glass are used to form a final laminate. This results in a sheet of glass which is from 1576-1970 mils (40-50 mm) thick. This makes the laminate expensive, difficult to machine and heavy to manipulate.
  • U.S. patent 4,774,143 both in the name of General Electri Company.
  • the United Kingdom patent describes a glazed structure having a back laminate comprising a plurality o laminae of polycarbonate, glass or solid resinous materials, with at least one of said laminae being of polycarbonate, and a front laminate comprising a pluralit of glass laminae, including a front lamina and a back lamina each of the latter laminae having a thickness of from 30 to 220 mils (0.76 to 5.59mm) and an intermediate glass core having a thickness greater than either the front or the back lamina.
  • the core in turn may be a single lamina or a plurality of laminae and preferably have a thickness of 220 to 1000 mils (5.59 to 25.4mm) .
  • the U.S. patent describes a transparent laminated window structure comprising a continuous inner layer of thermoplastic material, and an outer layer substantially parallel to the inner layer including at least a first course of discreet, mutually spaced glass segments, with the space between adjacent segments containing an adhesiv material.
  • the window structure may further comprise a strip of elastomeric material compressed between the inne and outer layers so as to define a gap between the layers
  • a projectile will only fracture that segment and will not cause cracking in adjacent, mutually spaced segments in the same course, allowing a high degree of visibility through the window structure upon impact by a projectile.
  • the glass segments are themselves composed of glass laminae making the structure complex, thick and bulky. Both these prior art specifications describe structures which have a front panel which is a laminate made with several glass laminae, characteristic of "bulle proof glass”. Both of these specifications describe the use of an air gap between the front and back laminates of the structures.
  • the air gap only adds to improve the optical characteristics of the double glazed laminate structure.
  • the gas gap is described as not critical to the invention but merely included where the window structure may be exposed to alternating high and low temperature environments which might cause warpage between the front and rear panels of the structure.
  • a bullet resistant glass screen including a plurality of sheets o glass, each sheet of glass having applied to at least on surface thereof a shatter resistant security film and ea sheet of glass being separated from a neighbouring sheet of glass by a given separation.
  • each sheet has a layer of the security film applied to each of the front and rear surfaces, whi the gap between neighbouring sheets is filled with air.
  • the type of film that can be used for example is a polyester security film manufactured as shatter resistan film by the company 3M (Minnesota, Mining and Manufacturing Company) . This film is applied to the surface of a glass sheet to prevent shattering of the sheet and the spraying of glass fragments.
  • the film has water activated pressure sensitive adhesive to bond it t the glass surface.
  • FIG. 1 shows a schematic of the top half of a security screen according to the invention. For reasons of symmetry the bottom half is not shown. PREFERRED MODES OF PERFORMING THE INVENTION
  • a security screen 1 comprises set of four sheets of window glass 2, 3, 4, and 5 respectively separated by a series of gaps, 6, 7 and 8.
  • glass sheet 2 will be considered the front of the screen 1.
  • the four sheets of glass, 2, 3, 4 and 5 are held in their fixed spatial relationship by a frame 9.
  • the frame 9 can be any suitable structure made of material commonly used in the trade for example metal extrusion, wood or plastic.
  • Each of the sheets, 2, 3, 4 and 5 has applied to its front and rear surface a sheet of shatter resistant film 10.
  • the spaces 6, 7 and 8 between the sheets 2, 3, 4 and 5 is filled with air.
  • the film 10 is applied to the faces of the sheets 2, 3, 4 and 5 in the usual manner for this type of shatter resistant film.
  • this is a polyester film having a water activated, pressure sensitive adhesive.
  • the sheets of glass 2, 3, 4 and 5 can be standard window glass.
  • several test were performed with a .22 high velocity rifle. In the first test 197 mils (5 mm) fixed sheets of glass were used with a gap of 125 mils (3.175 mm) .
  • a polyester shatter resistant film from 3M having a thickness of 7.09 mils (.18 mm) was used.
  • a single shot fired at the glass screen resulted in the front sheet 2 being shattered but without the film 10 on the rear surface of that sheet being penetrated.
  • the second sheet of glass namely sheet 3 of Figure 1 fractured presumably as a result of the shock waves emanating from the impact.
  • the glass-polyester film laminate is a composite structure with the film increasing the tensile strength the glass sheet alone. This means that the structure ca be deformed to a greater degree (absorb more kinetic energy) before fracturing occurs. The more kinetic ener is absorbed, the slower the bullet moves after fracturin the sheet of glass.
  • a projectile fired from a firearm can travel at a supersonic speed producing shock waves. Damage to a glass sheet will thus occur as a result of both the high kinetic energy of the projectile and the energy associat with the shock waves. As it is understood in the presen invention, these energies are efficiently absorbed by th multiple layers of the glass in two ways.
  • the kinetic energy of the projectile is absorbed more efficiently in each sheet by increasing the tensile strength of the gla sheet alone. This is done by securely bonding the thin layer of security film to one or both faces of the glass sheet.
  • the air gap between sheets is used to dissipate t energy of the shock waves. It is the combination of thes two aspects of the invention that provides an efficient bullet resistant screen.
  • Screens can be made with air gaps or separations bet glass sheets of 31.3-3846 mils (approx. 1-100 mm) and gla sheets of 78-473 mils (2-12 mm) thicknesses can be employ depending on the requirements of a given application. Th separation between sheets and the thicknesses of sheets c varied for a particular screen, as can the number of shee used in a screen as required.
  • the present invention therefore provides a bullet resistant screen for use in such areas as the security cages for bank tellers and at other installations such as service stations where visibility in addition to security is required.
  • the present invention is capable of being assembled on site using the skills of an ordinary glazier and without the need to resort to special tools to cut the glass sheets. It is contemplated that the shatter resistant film will normally be applied at manufacture saving this one step in assembly of the security screen. However it is to be understood that this is not necessary.
  • the security screen could be made with as few as two sheets of glass, depending on the application.
  • each sheet of glass as having a film on. both sides of the sheet of glass it is also contemplated that a sheet of glass may only be laminated on one face of the sheet. Equally, the outermost sheets may only have the film applied on their internal face with their external surfaces free of a laye of film.
  • Other thicknesses of glass or combinations of glass layers of different thicknesses as well as other types of glass as described in the above embodiment are also contemplated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Laminated Bodies (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Abstract

La vitre à l'épreuve des balles décrite (1) comprend un certain nombre de couches de verre (2-5). Les couches (2-5) sont séparées par un espace d'air (6-8) et chaque couche comporte sur au moins l'une de ses surfaces une pellicule de sécurité (10) de préférence en polyester. Chaque couche (2-5) peut comporter la pellicule (10) à la fois sur sa surface antérieure et sur sa surface postérieure. L'augmentation de l'espace d'air accroît la résistance de la structure à la pénétration par un projectile. L'épaisseur standard du verre à vitres peut être utilisée. L'adhérance de la pellicule de polyester contre les couches de verre peut être assurée par un adhésif autocollant.
EP19890908145 1988-07-18 1989-07-18 Bullet resistant glass Withdrawn EP0445118A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU9361/88 1988-07-18
AUPI936188 1988-07-18

Publications (2)

Publication Number Publication Date
EP0445118A1 true EP0445118A1 (fr) 1991-09-11
EP0445118A4 EP0445118A4 (en) 1991-11-06

Family

ID=3773221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890908145 Withdrawn EP0445118A4 (en) 1988-07-18 1989-07-18 Bullet resistant glass

Country Status (7)

Country Link
EP (1) EP0445118A4 (fr)
JP (1) JPH03506056A (fr)
KR (1) KR900702167A (fr)
CN (1) CN1032662C (fr)
BR (1) BR8907560A (fr)
NZ (1) NZ229985A (fr)
WO (1) WO1990001100A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2731512B1 (fr) * 1995-03-06 1997-04-30 Giat Ind Sa Panneau de blindage transparent
DE19619357A1 (de) * 1996-05-14 1997-11-20 Degussa Durchschußhemmende Verglasung sowie deren Verwendung
KR100372374B1 (ko) * 2000-10-30 2003-02-19 조동하 방탄유리의 제조방법
US7762175B1 (en) * 2006-11-30 2010-07-27 Honeywell International Inc. Spaced lightweight composite armor
CN104048560A (zh) * 2014-06-25 2014-09-17 刘百川 多层复合钢板
FR3029454B1 (fr) * 2014-12-04 2020-09-25 Saint Gobain Vitrage blinde fabrique a partir de constituants de vitrages feuilletes de grande serie

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2474477A1 (fr) * 1979-12-03 1981-07-31 Ravaut Jean Phs protection de haute securite pour surfaces vitrees
FR2483845A1 (fr) * 1980-06-06 1981-12-11 Delehonte Marc Panneaux transparents de securite

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2336544A (en) * 1939-04-22 1943-12-14 Libbey Owens Ford Glass Co Method of fabricating multiple glass sheet glazing units
US2310402A (en) * 1941-02-28 1943-02-09 Pittsburgh Plate Glass Co Glass insulation unit
US2401552A (en) * 1943-06-02 1946-06-04 Pittsburgh Plate Glass Co Window construction
GB603857A (en) * 1945-11-01 1948-06-24 Stone J & Co Ltd Improvements relating to glass panes for windows
FR2294315A1 (fr) * 1974-12-09 1976-07-09 Chalons Francois Panneau transparent isolant
FR2529609A1 (fr) * 1982-07-05 1984-01-06 Saint Gobain Vitrage Vitrage multiple a proprietes d'isolation thermique et acoustique

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2474477A1 (fr) * 1979-12-03 1981-07-31 Ravaut Jean Phs protection de haute securite pour surfaces vitrees
FR2483845A1 (fr) * 1980-06-06 1981-12-11 Delehonte Marc Panneaux transparents de securite

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9001100A1 *

Also Published As

Publication number Publication date
WO1990001100A1 (fr) 1990-02-08
CN1032662C (zh) 1996-08-28
BR8907560A (pt) 1991-06-18
EP0445118A4 (en) 1991-11-06
KR900702167A (ko) 1990-12-06
JPH03506056A (ja) 1991-12-26
CN1052820A (zh) 1991-07-10
NZ229985A (en) 1992-01-29

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