EP0769671A2 - Etoffe pour la protection contre les coups de couteau - Google Patents

Etoffe pour la protection contre les coups de couteau Download PDF

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Publication number
EP0769671A2
EP0769671A2 EP96306816A EP96306816A EP0769671A2 EP 0769671 A2 EP0769671 A2 EP 0769671A2 EP 96306816 A EP96306816 A EP 96306816A EP 96306816 A EP96306816 A EP 96306816A EP 0769671 A2 EP0769671 A2 EP 0769671A2
Authority
EP
European Patent Office
Prior art keywords
strands
stab
layers
material according
layer
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Withdrawn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
EP96306816A
Other languages
German (de)
English (en)
Other versions
EP0769671A3 (fr
Inventor
Iain Mcallen
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.)
Meggitt UK Ltd
Original Assignee
Meggitt UK Ltd
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
Priority claimed from GBGB9519467.6A external-priority patent/GB9519467D0/en
Priority claimed from GBGB9609333.1A external-priority patent/GB9609333D0/en
Application filed by Meggitt UK Ltd filed Critical Meggitt UK Ltd
Publication of EP0769671A2 publication Critical patent/EP0769671A2/fr
Publication of EP0769671A3 publication Critical patent/EP0769671A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F41H1/00—Personal protection gear
    • F41H1/02—Armoured or projectile- or missile-resistant garments; Composite protection fabrics

Definitions

  • the invention relates to anti-stab material and to the use of such a material in body armour.
  • anti-stab material comprising a set of metal strands secured to a non-metallic support fabric, wherein all the metal strands in the material are substantially unidirectional.
  • the spacing of the metal strands is chosen depending on a variety of factors such as the strand thickness and the type of weapons to which the material is intended to be resistant. Typically, the strand centres are spaced apart by less than 10mm, preferably less than 6mm, and most preferably in the range 2-4mm or 2.5-5mm. In some cases, the adjacent strands could touch.
  • the metal strands can be bonded to a single support fabric sheet using a suitable adhesive such as a resin adhesive.
  • a suitable adhesive such as a resin adhesive.
  • the metal strands are sandwiched between two sheets of the non-metallic support fabric. This provides greater support for the strands so that they are more effective at withstanding a blade attack.
  • the metal strands are woven to strands of the support material.
  • the metal strands could comprise the warp in the woven material, the weft being made from strands of a non-metallic support fabric, for example nylon or aramid.
  • a woven arrangement provides inherent strength and resistance to lateral movement between the metal strands although typically the strands will be additionally bonded to the non-metallic support fabric to provide additional security against relative movement.
  • the metal strands typically comprise twisted metal filaments and typically have a diameter of less than 1mm. Such strands will have a high tensile breaking strength which is preferably not less than 2.5N/mm 2 and a breaking point not less than 1500N.
  • a layer of the anti-stab material according to the invention will provide good resistance to stab attack but in preferred arrangements, at least two layers of the anti-stab material are formed into an anti-stab structure, the strands in each layer extending in a direction different from the strands in the other layer(s).
  • three layers of the anti-stab material are provided, the strands in two of the layers extending at + 30° on either side respectively of an orthogonal to the strands of the third layer.
  • three layers of the anti-stab material are provided, the strands in two of the layers extending at ⁇ 45° on either side respectively of an orthogonal to the strands of the third layer.
  • the anti-stab material can be used by itself in some circumstances but conveniently is incorporated into body armour which further comprises a ballistic resistance pack.
  • the construction of the ballistic resistance pack can be of any conventional form and will typically comprise a trauma pack and multiple layers of ballistic fabrics such as Kevlar.
  • Figure 1 illustrates in very enlarged, schematic form the appearance of the woven, anti-stab material.
  • This comprises a set of unidirectional metal strands 1 woven with a set of unidirectional non-metallic strands 2.
  • the non-metallic strands typically comprise strands of nylon or aramid fibres while the metal strands 1 are formed, in this example, from 0.7% carbon steel which has been hot dipped galvanised.
  • Each metal strand is constructed from three twisted subsidiary strands each of seven twisted wire filaments 0.18mm in diameter to provide a finished strand having a diameter of about 0.91mm.
  • the diameter of each strand is in the range 0.4-1.5mm.
  • the metal strands have a tensile strength of 2650N/mm 2 and a breaking point of 1530N.
  • FIG. 1 A single sheet of the anti-stab material shown in Figure 1 will provide some resistance to stab attack but in preferred arrangements, more than one sheet is provided.
  • Figure 2 illustrates schematically the construction of a layer of body armour having three layers of the anti-stab material 5-7. Each layer 5-7 is substantially identical with the other layers but the direction of the metal strands 1 differs between the layers. This can be seen most easily in Figures 3A-3C which illustrate layers 5-7 respectively. Each layer 5-7 has a similar shape with a main body portion 8 for covering the wearer's chest together with shoulder portions 9.
  • the layer 5 (Figure 3A) has generally horizontally oriented metal strands 1.
  • the layer 6 Figure 3B) has the metal strands extending in a direction about -30° to the vertical
  • the layer 7 Figure 3C
  • Figure 3C has the metal strands 1 extending in the direction +30° to the vertical.
  • This three layer construction is particularly preferred and provides very effective resistance to stab attack.
  • a blade entering the material layer 5 may partially pass through that layer 5 but will then be received in the layer 6 and possibly finally in the layer 7. Since the metal strands extend in different directions in each layer, they will provide resistance to movement of the blade from different angles and it has been found empirically that this arrangement achieves very significant protection.
  • the three layers 5-7 will be stitched together around their periphery as indicated at 10.
  • the layers are positioned within a bag 11, typically made of nylon and constituting the outermost layer of the body armour.
  • a ballistic resistance pack 12 Positioned behind the layers 5-7 is a ballistic resistance pack 12 which can be formed in any conventional manner.
  • the ballistic pack 12 could comprise an interleaved construction of suitable ballistic fabrics such as Kevlar, Twaron or Dyneema (Registered Trademarks).
  • the ballistic pack 12 comprises nine layers of Dyneema interleaved with nine layers of Twaron. If desired, these multiple layers can be secured together by stitching such as quilt stitching (not shown in Figure 2).
  • a trauma pack 13 which also comprises a number of layers, for example 11 layers, of Kevlar.
  • the wearer's body is shown schematically at 14.
  • the trauma pack 13 will be stitched over the ballistic pack 12, usually along one edge.
  • the body armour shown in Figure 2 includes a ballistic pack 12, this could be omitted in some cases although usually it is desirable to include a trauma pack with the anti-stab material.
  • An alternative trauma pack comprises a felt pad typically made of a high tensile fibre felt and optionally including a rubber facing on the side facing the attack face of the body armour. It has been found that the addition of the rubber facing significantly improves the trauma resistance of the felt.
  • An example of a suitable high tensile fibre felt is a polyester needle felt having a weight of 1520g/mm 2 , a thickness of 5.3mm, a tear strength of 200/300daN and an extension at break of 100% as sold by Naish Felts Limited.
  • the rubber facing may be of natural or synthetic rubber. The addition of the rubber facing has been found to be particularly beneficial in absorbing the kinetic energy of a ballistic missile.
  • the body armour will typically comprise a front panel as shown in Figure 2 and an equivalent back panel (not shown) connected via the shoulder portions 9.
  • additional plies or layers of a silk-type fabric could be provided secured together by stitching along the sides behind the layer 7. This leaves the layers of silk free to move relative to each other which assists in absorbing the kinetic energy from ballistic missiles and additionally provides resistance to penetration by edged weapons such as knives, spikes etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Laminated Bodies (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Woven Fabrics (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
EP96306816A 1995-09-23 1996-09-19 Etoffe pour la protection contre les coups de couteau Withdrawn EP0769671A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GBGB9519467.6A GB9519467D0 (en) 1995-09-23 1995-09-23 Body armour
GB9519467 1995-09-23
GB9609333 1996-05-03
GBGB9609333.1A GB9609333D0 (en) 1996-05-03 1996-05-03 Stab-resistant fabrics for use in body armour

Publications (2)

Publication Number Publication Date
EP0769671A2 true EP0769671A2 (fr) 1997-04-23
EP0769671A3 EP0769671A3 (fr) 1998-01-07

Family

ID=26307812

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96306816A Withdrawn EP0769671A3 (fr) 1995-09-23 1996-09-19 Etoffe pour la protection contre les coups de couteau

Country Status (1)

Country Link
EP (1) EP0769671A3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2322638A (en) * 1997-02-13 1998-09-02 T & N Technology Ltd Knife-resistant sheet
US6534426B1 (en) 2000-01-14 2003-03-18 E. I. Du Pont De Nemours And Company Knife-stab-resistant composite
US6737368B2 (en) 2001-12-19 2004-05-18 E. I. Du Pont De Nemours And Company Multiple threat penetration resistant articles
WO2005050127A1 (fr) 2003-11-03 2005-06-02 Nv Bekaert Sa Insert pare-balles avec textile non tisse et cables d'acier
WO2005059468A1 (fr) * 2003-12-15 2005-06-30 Nv Bekaert Sa Tampon pare-balles a corde metallique
EP3547388A1 (fr) * 2018-03-29 2019-10-02 Bell Helicopter Textron Inc. Caisse résistante aux perforations

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562951A (en) * 1946-08-26 1951-08-07 Rose Arthur Armor
US3764277A (en) * 1969-08-28 1973-10-09 R Hollis Metal composites including layer of unwoven wires
GB2142887A (en) * 1983-07-05 1985-01-30 Rolls Royce Improvements in or relating to thrust deflection
GB2232063A (en) * 1989-04-14 1990-12-05 Personnel Armoured Designs Lim Projectile resistant shield for protective garments
WO1992008095A1 (fr) * 1990-10-25 1992-05-14 Allied-Signal Inc. Structures de fibres tridimensionnelles possedant une resistance a la penetration amelioree

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562951A (en) * 1946-08-26 1951-08-07 Rose Arthur Armor
US3764277A (en) * 1969-08-28 1973-10-09 R Hollis Metal composites including layer of unwoven wires
GB2142887A (en) * 1983-07-05 1985-01-30 Rolls Royce Improvements in or relating to thrust deflection
GB2232063A (en) * 1989-04-14 1990-12-05 Personnel Armoured Designs Lim Projectile resistant shield for protective garments
WO1992008095A1 (fr) * 1990-10-25 1992-05-14 Allied-Signal Inc. Structures de fibres tridimensionnelles possedant une resistance a la penetration amelioree

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2322638A (en) * 1997-02-13 1998-09-02 T & N Technology Ltd Knife-resistant sheet
GB2322638B (en) * 1997-02-13 2001-05-30 T & N Technology Ltd Knife-resistant sheet
US6534426B1 (en) 2000-01-14 2003-03-18 E. I. Du Pont De Nemours And Company Knife-stab-resistant composite
US6737368B2 (en) 2001-12-19 2004-05-18 E. I. Du Pont De Nemours And Company Multiple threat penetration resistant articles
WO2005050127A1 (fr) 2003-11-03 2005-06-02 Nv Bekaert Sa Insert pare-balles avec textile non tisse et cables d'acier
CN1875241B (zh) * 2003-11-03 2010-09-29 贝卡尔特股份有限公司 具有钢绳和非织造织物的防刺插件
WO2005059468A1 (fr) * 2003-12-15 2005-06-30 Nv Bekaert Sa Tampon pare-balles a corde metallique
EP3547388A1 (fr) * 2018-03-29 2019-10-02 Bell Helicopter Textron Inc. Caisse résistante aux perforations
US10807733B2 (en) 2018-03-29 2020-10-20 Textron Innovations Inc. Puncture-resistant storage systems and devices

Also Published As

Publication number Publication date
EP0769671A3 (fr) 1998-01-07

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