EP0643602A1 - Tissus composites conferant une protection contre des substances chimiques - Google Patents

Tissus composites conferant une protection contre des substances chimiques

Info

Publication number
EP0643602A1
EP0643602A1 EP93913297A EP93913297A EP0643602A1 EP 0643602 A1 EP0643602 A1 EP 0643602A1 EP 93913297 A EP93913297 A EP 93913297A EP 93913297 A EP93913297 A EP 93913297A EP 0643602 A1 EP0643602 A1 EP 0643602A1
Authority
EP
European Patent Office
Prior art keywords
layer
fabric
composite fabric
composite
layers
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Withdrawn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
EP93913297A
Other languages
German (de)
English (en)
Inventor
David Whitfield
James Battensby
Adrian James Clark
Susan Elizabeth Holmes
David Mark Griffiths
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.)
UK Secretary of State for Defence
Original Assignee
UK Secretary of State for Defence
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 GB929211996A external-priority patent/GB9211996D0/en
Priority claimed from GB929212017A external-priority patent/GB9212017D0/en
Application filed by UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Publication of EP0643602A1 publication Critical patent/EP0643602A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D5/00—Composition of materials for coverings or clothing affording protection against harmful chemical agents
    • 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
    • B32B5/02—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 structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • 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
    • B32B5/02—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 structural features of a fibrous or filamentary layer
    • B32B5/024—Woven fabric
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • 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
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • 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
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • 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
    • B32B2307/70—Other properties
    • B32B2307/73—Hydrophobic
    • 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
    • B32B2310/00—Treatment by energy or chemical effects
    • B32B2310/04—Treatment by energy or chemical effects using liquids, gas or steam
    • 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
    • B32B2571/00—Protective equipment

Definitions

  • the present invention relates to novel composite fabrics having resistance to penetration by chemical agents, particularly organic chemical agents of a gaseous and/or liquid nature such as may be encountered in the chemical industry or in military situations where chemical warfare agents have been deployed.
  • the fabrics of the invention have preferred application in the manufacture of protective clothing for use in chemically contaminated environments or in the manufacture of other items for protecting humans and their equipment, eg. casualty evacuation bags or respirator bags.
  • the protection a fabric affords the wearer against chemical agents in the surrounding environment is only one of the factors influencing its design and that of garments and containers made from it. It is also necef * Ty, inter alia, to consider the physiological load that will be impo. . on the user, the cost, and the inten ? conditions of its use. It is important that the protection afforded , maximised within the constraints imposed by other factors.
  • wicking serves two purposes: a) it encourages evaporative loss of agent from the surr _ce of the cloth to the atmosphere by increasing the exposed surface area; b) it subjects ingressing vapour to a larger area of antigas fabric below the wicking layer thereby maximising absorptive uptake by the carbon contained therein.
  • a central requirement for any new fabric is the retention of breathability to minimise physiological load, an important requirement despite the constraints this imposes upon types of material which can be used and their construction.
  • An understanding of liquid behaviour, particularly at the first barrier is considered to be of importance in providing maximum protection, whether the system be of improved air-permeable type or of breathable membrane construction.
  • As an example of the importance of wicking comparison of the natural weathering properties of Goretex and modified acrylic has shown there can be significant differences in liquid persistency arising from the choice of outer fabric.
  • wicking fabric Whilst a wicking fabric rapidly spreads the load and provides absorbency, a non-wicking fabric provides repellency thereby helping to protect underlying layers from free liquid penetration.
  • Preferred objects of the present invention are retention of the ability to release chemical agent by natural weathering and reducing the need for decontamination, providing relatively fast reducing contact and transfer hazard; or decreased penetration of outer layers.
  • Preferred fabrics of a first embodiment of the present invention provide higher liquid capacity than existing fabrics while retaining good water repellency and wind proofing, thus providing improved comfort in bad weather and restricting penetration of wind driven vapour.
  • Preferred fabrics of a second embodiment of the present invention provide higher liquid repellency than existing fabrics while retaining good water repellency and wind proofing, thus providing improved comfort in bad weather and restrietir ⁇ penetration of wind driven vapour.
  • the present invention provides an air perme ble composite fabric having layers positioned innermost and outermost with respect to a body or object to be enveloped in by the fabric in use comprising:
  • an outermost woven fabric layer (a); an intermediate woven or fibrous non-woven fabric layer (b) and an innermost layer (c) based upon gas adsorbing carbon.
  • layer (a) has an organic liquid wicking capability, or has organic liquid repellency of at least 4 on the 3M scale, as described below; layer (b) has organic liquid repellency of at least k on the 3M scale, as described below, and has little or no organic liquid wicking capability.
  • layer (a) and/or (b) is water repellent.
  • the present invention further provides items of clothing or a container made from this fabric material wherein the layer (a) is positioned on the threat side of layer (b) and layer (c) is positioned on the protected or 'body' side.
  • the fist layer (a) has an organic liquid wicking capability, preferably comprising a woven, preferably close woven, fabric of sufficient sorptive capacity to inhibit further ingress of neat and thickened liquid.
  • the fabric will be selected to have sufficient strength and resilience for its intended purpose.
  • the fabric is of weight over 150g/m 2 , more preferably over 200g/m 2 , most preferably about 215g/m 2 .
  • Preferred product of the Ends and Picks is less than 1000, more preferably less than 800 eg. suitably about 35 x 20.
  • this layer is treated, eg. with fluorocarbon or silicone, in order to render it water repellent while retaining the wicking capability; treatment methods may vary with material selected as will be understood by those skilled in the art.
  • second layer (b) comprises a fine woven fabric, eg product of Ends X Picks being over 1500, suitably about 60 x 30, and preferably being lighter in weight than layer (a), eg. less than 130g/m 2 , suitably about 120g/m 2 .
  • This layer is conveniently calendered and most preferably water proofed by fluorocarbon treatment.
  • layer (c) is an activated carbon fabric typically being a strong fabric having sufficient vapour retention capacity to provide at least 24 hours protection.
  • a particular advantage of use of the wicking and non-wicking combination as provided for by this first aspect of the present invention is that it allows ommission of non-woven oil and water repellent layers and in turn this allows more carbon to be included in the carbon layer.
  • layer (c) may comprise only activated carbon padded through a support fabric.
  • the outermost layer (a) has organic liquid repellency of 4 or more on the 3M scale, as described below.
  • the outermost layer (a) comprises a woven fabric but otherwise may be of open, close or fine weave.
  • this fabric is both organic liquid repellent and water repellent.
  • the fabric will be selected to have sufficient strength and resilience for its intended purpose. Weight of the fabric should be as light as possible while being consistent with these objectives.
  • the layer may be treated for proofing urposes by spraying or dipping with fluorocarbon, treatment methods iuay vary with material selected as will be understood by those skilled in the art.
  • the layer (b) preferably comprises a woven fibrous fabric.
  • _s layer is conveniently calendered and preferably water proofed by fluorocarbon treatment and may be the same as the ayer (a).
  • layer (c) is an activated carbon fabric typically being a strong fabric having sufficient vapour retention capacity to provide at least 24 hours protection.
  • a particular advantage of use of the combination as provided for by the present invention is that it allows ommission of non-fibrous oil and water repellent layers and in turn this allows more carbon to be included in the carbon layer.
  • layer (c) may comprise only activated carbon padded through a support fabric.
  • the oil-repellency of layers (a) and/or (b) may be provided by a variety of known treatments.
  • One such suitable treatment is by use of the known Meltonian Protector with Scotchguard and wherein typically fabric material is sprayed evenly on both sides until wet then dried at about 8 ⁇ °C for eg 30 minutes.
  • a further suitable treatment providing still greater repellency uses Scotchguard Fabric Protector FX 3569 wherein typically the fabric is immersed in 3% FX 3 9 concentrate in 2% acetic acid for 30 minutes, dried at about 80°C for about 30 minutes and then heated at about 165°C for about 30 minutes. These two treatments are assessed at oil repellency rating numbers 4 and 6 respectively the 3M Oil Repellency Test system.
  • the 3M Oil Repellency Test is designed to detect the presence of a fluorochemical finish on all types of fabrics and provides a simple, rapid method of measurement by evaluating the fabrics resistance to wetting by a selected series of hydrocarbon liquids of different surface tensions and is carried out as follows.
  • Test sample is placed on a smooth horizontal surface and a small drop of test liquid approximately 3 mm in diameter is gently placed on its surface using a pasteur pipette taking care not to contact the pipette with the sample.
  • the lower oil repellency test liquids are applied first, the drop is observed for 30 seconds at an angle of approximately 45° and if no penetration or wetting of the fabric at the interface and no wicking around the drop occurs the procedure is repeated using a test liquid with a higher oil repellency number until wetting occurs.
  • the oil repellency rating given to the fabric is that of the highest numbered test liquid which will not wet the fabric within 30 seconds.
  • carbon fabrics may usefully be provided as a multiple, eg double carbon fabric layer construction wherein the activated carbon is divided, preferably equally, between two or more carbon fabric layers.
  • the activated carbon is divided, preferably equally, between two or more carbon fabric layers.
  • Figure 1 shows a diagrammatic cross-section through a composite fabric of the first apsect of the present invention.
  • Figure 2 shows a diagrammatic cross-section through a composite fabric of the second aspect of the esent invention.
  • EXAMPLE 1 ORGANIC WICKING FABRIC AS LAYER ( R) .
  • a non-wicking layer (8) is interposed between the outer wicking layer (3) and carbon layer (5) together with an associated air spaces (4), (6) and (9).
  • the carbon layer (5) does not have the previously commonly incorporated integral fluorocarbon layer and thus the amount of carbon in said layer (5) is optionally increased.
  • Applied organic agent (1) is wicked by the outer wicking layer (3) thus increasing its surface area to volume ratio and facilitating evaporation into the surrounding air (2) . Studies .
  • Neat liquids were chosen to span a range of surface tensions from water (72.6 mN/m at approx. 20°C) to heptane (20.3 mN/m at approx. 20°C) , with nerve agent GD representing a low tension CW agent (24.5 mN/m at approx. 20°C) .
  • Loadings of up to 2. kg/cm 2 were applied as representative of realistic localised wearing pressures typified by actions such as crawling and kneeling on hard surfaces. In this way factors important in controlling liquid penetration were determined under conditions likely to be found in the field.
  • Test Liquids Chemical Warfare (CW) Agents used were neat Nerve Agent (GD) and neat Sulphur Mustard Agent (HD) .
  • GD Nerve Agent
  • HD neat Sulphur Mustard Agent
  • DMMP Dimethyl Methylphosphonate
  • MS Methyl Salicylate
  • TEP Triethyl Phosphate
  • n-Heptane all GPR grade
  • Drop Spreading Behaviour The full range of test liquids were used in these studies. Samples of test fabric were cut to the size of a standard 75mm x 51mm glass microscope slide, and placed on top of the same. The test liquid was then applied to the fabric surface as 2 separate l ⁇ l drops using a Hamilton PB-600-1 Repeating Dispenser equipped with a 50 ⁇ l capacity Hamilton Syringe. The behaviour of the droplets was then observed with time for up to 2 hours.
  • Wicking Behaviour Pieces of test fabric were cut into strips measuring 2.0 cm by approximately 12 cm, with the long axis cut in either warp or weft direction and the strips were then attached in turn to a Lauda automatic tensiometer. Wicking rates were measured by bringing the fabric strip in contact with the liquid surface (MS or TEP), arresting it in position, and then monitoring liquid uptake via the change in force at a transducer.
  • Methyl salicylate thickened with K125 and dyed red with 0.5% Orasol Red, was used as a substitute for thickened Mustard.
  • a similar assembly to that for visual observations was used, with a plain piece of tissue placed beneath the piece of test cloth on which to observe breakthrough. Both single layers of cloth and paired layers were evaluated and the paper visually examined from below during the run (or after a set time interval in the case of a heavier loading) .
  • (+) denotes delayed spreading
  • Wicking behaviour TEP and MS were used as CW agent simulants where it was impracticable to use toxic liquids as was the case in wicking rate measurement. The following observations were observed: Wicking is more rapid in the weft than in the warp direction; differences being more pronounced in unproofed fabrics; where wicking occurs the effect is the same for proofed and unproofed fabrics with MS and TEP. Uptake capacity for the wicking fabrics correlated with cloth weight.
  • a variety of mechanisms may be used to bind the layers together, eg. by use of a discontinuous or continuous applied adhesive layer, or by individual mechanical connection such as by threads.
  • the fabric layers will be bound together by stitching applied at the least vulnerable parts of the garment or container, eg. shoulders, wrists and ankles.
  • a fabric layer (8) is interposed between the outer woven layer (3) and carbon layer (5) together with an associated air spaces (4), (6) and (9).
  • the carbon layer (5) does not have the previously commonly incorporated integral fluorocarbon layer and thus the amount of carbon in said layer (5) is optionally increased.
  • Applied organic agent (1) penetrating layer (3) is arrested by contact with layer (8) and any penetrating vapour is adsorbed by activated carbon layer (5) •
  • Tests were carried out using a hollow brass cylinder 30cm long by 12cm diameter with a 5 «5cm wide flattened section running along its longitudinal axis. Fabrics were applied to cover this section and any vapour penetrating was trapped in passive sampling tubes filled with adsorbent Tenax embedded in a 3 x 3 array of ho ⁇ s in the centre of the arm and open to the flattened section. The amount of vapour trapped was determined using a Perkin-Elmer 8600 gas chromatogram fitted with a 25m long 0.32 mm internal diameter polyimide-coated fused silica column (SGE) and a flame-ionisation detector. Oven temperature was 130°C and detector temperature was 250°C. Injection was via a Perkin-Elmer ATD 50 carousel system. Sampling tubes were placed in position and fabric under test wrapped around the cylinder.
  • SGE polyimide-coated fused silica column
  • a 30mg drop of thickened sulphur mustard (HD) was placed over each of the four corner tubes and a pressure of either 0.16 or 5Kg/cm 2 was then applied to the drops for mins. Following removal of the load the cylinder was left undisturbed for 24 hrs, dismantled and the nine tubes contents analyzed.
  • HD thickened sulphur mustard
  • Results are given as mean values from the four corner sampling tubes and are expressed in ⁇ g HD per tube. Data from other tubes was used to determine the area covered by any contamination.
  • the most optimal configuration is that where both non-carbon fabric layers are oil-repellent
  • the optimal two non-carbon fabric layers are positioned such that the oil-repellency of the innermost layer (layer 2- layer (b)) is rated 4 or 6 (spray-on or dipped treatment) and the outer layer (Layer 1- layer (a)) is untreated, less penetration occurs than if these layers are reversed.
  • Such an arrangement is specifically the subject of the first aspect of this invention.
  • a particular application for the double carbon layered structure is in the provision of protection of parts of a suit or container which are subjected to comparatively high pr sures in use; eg. knee and elbow regions.
  • the parts of a suit in these regions might usefully be made of a fabric having a double layer of carbon fabric beneath the shell fabric, eg. (a) and (b) or be patched selectively therewith.
  • the layers of the composite fabrics of the invention may conveniently be held together in a variety of ways but most conveniently will be stitched together away from vulnerable regions of the suit or conatiner; ie. stitched at the shoulder wrist or ankle. Other known ways of holding the layers together will occur to a person skilled in the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Toxicology (AREA)
  • General Health & Medical Sciences (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Laminated Bodies (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)

Abstract

La présente invention se rapporte à de nouveaux tissus composites présentant une résistance à la pénétration par des substances chimiques, en particulier des substances chimiques organiques de nature gazeuse ou liquide, que l'on trouve dans l'industrie chimique ou dans un contexte militaire dans lequel des armes chimiques ont été utilisées. Les tissus de l'invention peuvent être utilisés dans le cadre de la fabrication de vêtements de protection destinés à des environnements contaminés par des produits chimiques, ou de la fabrication d'autres éléments de protection pour des personnes et pour leur matériel, par exemple des sacs pour l'évacuation des blessés ou des poches à oxygène. Ces tissus comprennent des couches enveloppes placées au-dessus d'une ou plusieurs couches de tissus contenant du carbone antigaz, au moins l'une des couches enveloppe, ou, de préférence, les deux couches, étant oléorésistante(s), l'autre couche étant constituée d'une couche à effet de capillarité par rapport aux liquides organiques.
EP93913297A 1992-06-05 1993-06-04 Tissus composites conferant une protection contre des substances chimiques Withdrawn EP0643602A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB9211996 1992-06-05
GB929211996A GB9211996D0 (en) 1992-06-05 1992-06-05 Composite fabrics for protection against chemical agents
GB929212017A GB9212017D0 (en) 1992-06-05 1992-06-05 Composite fabrics for protection against chemical agents
GB9212017 1992-06-05
PCT/GB1993/001192 WO1993025279A1 (fr) 1992-06-05 1993-06-04 Tissus composites conferant une protection contre des substances chimiques

Publications (1)

Publication Number Publication Date
EP0643602A1 true EP0643602A1 (fr) 1995-03-22

Family

ID=26301012

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93913297A Withdrawn EP0643602A1 (fr) 1992-06-05 1993-06-04 Tissus composites conferant une protection contre des substances chimiques

Country Status (5)

Country Link
EP (1) EP0643602A1 (fr)
AU (1) AU4341793A (fr)
CA (1) CA2137254A1 (fr)
GB (1) GB2282779A (fr)
WO (1) WO1993025279A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7451497B2 (en) * 2003-10-14 2008-11-18 BLüCHER GMBH Protective handwear
US20090187060A1 (en) 2008-01-22 2009-07-23 E-Z-Em, Inc. Method and Formulation for Neutralizing Toxic Chemicals and Materials

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2025316B (en) * 1978-07-05 1982-06-30 Blucher H Von Compound material for protective clothing
JPS57156036A (en) * 1981-03-20 1982-09-27 Toyobo Co Ltd Protecting material against poisonous chemical material
US4459332A (en) * 1983-09-12 1984-07-10 American Cyanamid Company Flocked fabric laminate for protection against chemical agents
IL79955A0 (en) * 1986-09-05 1986-12-31 Israel Atomic Energy Comm Protective composite materials,their production and articles of protective clothing made therefrom
GB8714535D0 (en) * 1987-06-22 1987-11-18 Charcoal Cloth Ltd Protective clothing

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9325279A1 *

Also Published As

Publication number Publication date
WO1993025279A1 (fr) 1993-12-23
CA2137254A1 (fr) 1993-12-23
AU4341793A (en) 1994-01-04
GB9423659D0 (en) 1995-01-11
GB2282779A (en) 1995-04-19

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