Material for manufacturing protective equipment against nuclear, biological and chemical attacks

• US 5,162,148 A
• Filed: 12/21/1990
• Issued: 11/10/1992
• Est. Priority Date: 12/22/1989
• Status: Expired due to Term

• Current Assignee: Manufactures de Vetements Paul BOYE SA, Soplaril SA
• Original Assignee: Manufactures de Vetements Paul BOYE SA, Soplaril SA
• Inventors: Hervet, Daniel, Boye, Philippe
• Primary Examiner(s): Lesmes, George F.
• Assistant Examiner(s): Shelborne, Kathryne E.
• Application Number:
  US07/631,918
• Time in Patent Office: 690 Days
• Field of Search: 428/284, 428/286, 428/287, 428/288
• US Class Current: 442/395
• CPC Class Codes: A62D 5/00 Composition of materials for coverings or clothing affording protection against harmful chemical agents
• CPC Class Codes: B32B 2262/0253 Polyolefin fibres
• CPC Class Codes: B32B 2323/04 Polyethylene
• CPC Class Codes: B32B 2571/00 Protective equipment
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/12 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 27/304 comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: G21F 3/02 Clothing
• CPC Class Codes: Y10T 428/24975 No layer or component greater than 5 mils thick
• CPC Class Codes: Y10T 428/31797 Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31913 Monoolefin polymer
• CPC Class Codes: Y10T 442/675 Ester condensation polymer sheet or film [e.g., polyethylene terephthalate, etc.]

Abstract

A material for manufacturing protective equipment against nuclear, biological and chemical attacks, including

a non-woven polyolefin substrate

an outer layer made of a polyolefin film,

an intermediate layer of a protective material selected in the group comprising ethylene-hydrolyzed vinyl acetate (with 20-40% ethylene) copolymer (EVOH) and polyethylene terephtalate coated with polyvinylidene chloride,

the different layers being binded together by using suitable binders.

This material is appropriate for manufacturing pieces of clothing, tents, sheets, sleeves, and so on, in a protective purpose.

Claims

1. A material for manufacturing protective equipment against nuclear, biological and chemical attacks, comprising

a non-woven polyolefin substrate

an outer layer made of a polyolefin film,

an intermediate layer of a protective material selected from the group consisting of ethylene-hydrolyzed vinyl acetate with 20-40% ethylene copolymer and polyethylene terephtalate coated with polyvinylidene chloride, wherein said intermediate layer has a thickness of at least 6 μ

m

the different layers being binded together by using binders.

2. A material as claimed in claim 1, characterized in that it comprises

a) a layer of a polyolefin film having a thickness of 20 to 100 μ

m,

b) a layer of a binder,

c) an EVOH layer having a thickness of at least 6 μ

m,

d) a layer of a binder,

e) a layer of polyolefin film having a thickness of 20 to 100 μ

m,

f) a polyolefin non-woven substrate.

3. A material as claimed in claim 2, wherein the polyolefin films and the non-woven substrate are made of polyethylene.

4. A material as claimed in claim 2, which is obtained through co-extrusion of layers a to e and lamination of the obtained unit to the substrate f.

5. A material as claimed in claim 4, wherein the polyolefin films and the non-woven substrate are made of polyethylene.

6. A material as claimed in claim 1, wherein said intermediate layer of protective material consists of a polyethylene terephthalate film having a thickness of at least 12 μ

m with a polyvinylidene chloride layer of at least 3 μ

m thick.

7. A material according to claim 5, which is obtained by laminating the three layers in the presence of binders between the layers.