CBW protective clothing

• US 5,112,666 A
• Filed: 12/21/1989
• Issued: 05/12/1992
• Est. Priority Date: 06/22/1987
• Status: Expired due to Term

• Current Assignee: Lucerna Establishment
• Original Assignee: Charcoal Cloth Ltd (Kuraray Company Limited)
• Inventors: Langston, Richard D.
• Primary Examiner(s): Bell, James J.
• Application Number:
  US07/457,683
• Time in Patent Office: 873 Days
• Field of Search: 418/246, 418/408, 418/219, 418/266, 418/267, 418/920, 418/284, 418/198, 418/252, 418/257, 418/287, 418/283, 418/421, 418/446, 418/102, 418/104
• US Class Current: 428/104
• CPC Class Codes: A62D 5/00 Composition of materials for coverings or clothing affording protection against harmful chemical agents
• CPC Class Codes: B32B 2307/304 Insulating
• CPC Class Codes: B32B 2307/554 Wear resistance
• CPC Class Codes: B32B 2307/714 Inert, i.e. inert to chemical degradation, corrosion
• CPC Class Codes: B32B 2307/724 Permeability to gases, adsorption
• CPC Class Codes: B32B 2307/7265 Non-permeable
• CPC Class Codes: B32B 2437/00 Clothing
• CPC Class Codes: B32B 2571/00 Protective equipment
• CPC Class Codes: B32B 5/022 Non-woven fabric
• CPC Class Codes: B32B 5/024 Woven fabric
• CPC Class Codes: B32B 5/26 another layer next to it also being fibrous or filamentary relative arrangement of fibres or filaments of different layers B32B5/12
• CPC Class Codes: Y10S 428/92 Fire or heat protection feature
• CPC Class Codes: Y10T 428/24033 including stitching and discrete fastener[s], coating or bond
• CPC Class Codes: Y10T 428/2405 Coating, impregnation, or bond in stitching zone only
• CPC Class Codes: Y10T 428/24826 Spot bonds connect components
• CPC Class Codes: Y10T 428/30 Self-sustaining carbon mass or layer with impregnant or other layer
• CPC Class Codes: Y10T 428/3154 Of fluorinated addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 442/3512 Three or more fabric layers

Abstract

A composite material suitable for use as CBW protective clothing comprises, in combination:

an outer layer (1) of an abrasion-resistant, water-repellent material;

an intermediate layer (2) comprising activated charcoal cloth treated to provide liquid-repellency; and

an inner layer (3) of an abrasion-resistant material laminated to the intermediate layer.

This composite is light, breathable and has low thermal insulation properties, but provides good chemical protection.

Claims

1. A multi-ply material suitable for use as a protective material, which comprises, in combination:

(1) an outer layer of an abrasion-resistant, water-repellent material;

(2) an intermediate layer comprising activated charcoal cloth treated to provide liquid-repellency; and

(3) an inner layer of an abrasion-resistant material, said intermediate layer being adhesively bonded to said inner layer.

2. A material according to claim 1, wherein the outer layer is not laminated to the intermediate layer.

3. A material according to claim 1, which weighs no more than 500 g/m².

4. A material according to claim 1 which has an air permeability of at least 25 cm³ /cm² /sec at 10 mm w.g.

5. A material according to claim 1, which has a water transmission value of at least 1500 g/m² /24 h at 100% RH at 37°

C.

6. An article of protective clothing which comprises composite material according to claim 1.

7. An article according to claim 6, said article of clothing including portions adapted to cover a joint or vulnerable part of the wearer'"'"'s adapted to cover a joint or vulnerable part of the wearer'"'"'s anatomy, wherein said portions comprise impermeable material.

8. A material according to claim 2, which weighs no more than 500 g/m².

9. A material according to claim 2, which has an air permeability of at least 25 cm³ /cm² /sec at 10 mm w.g.

10. A material according to claim 3, which has an air permeability of at least 25 cm³ /cm² /sec at 10 mm w.g.

11. A material according to claim 2, which has a water transmission value of at least 1500 g/m² /24 h at 100% RH at 37°

C.

12. A material according to claim 3, which has a water transmission value of at least 1500 g/m² /24 h at 100% RH at 37°

C.

13. A material according to claim 4, which has a water transmission value of at least 1500 g/m² /24 h at 100% RH at 37°

C.

14. An article of protective clothing which comprises composite material according to claim 2.

15. An article of protective clothing which comprises composite material according to claim 3.

16. An article of protective clothing which comprises composite material according to claim 4.

17. An article of protective clothing which comprises composite material according to claim 5.

18. A material according to claim 1 which exhibits chemical protection such that liquid mustard drops applied in isolation will to penetrate the composite material over a period of at least four hours.

19. A material according to claim 1 wherein the intermediate layer comprises an active carbon material including a gas permeable surface coating of particulate hydrophobic material which renders the active carbon waterproof.

20. An article according to claim 6, wherein said layers are fastened together by stitching at seams of the article of clothing.

21. A protective suit adapted to be worn by a person, said suit comprising a composite material that comprises, in combination:

an outer layer of an abrasion-resistant, water repellent-material;

an intermediate layer comprising activated charcoal cloth treated to provide liquid-repellency; and

an inner layer of an abrasion-resistant material;

said layers being held together by stitching at seams of the protective suit.