Granted Patent B2

US 7,553,779 · App. 11/007,092 · Granted Jun 30, 2009

Abstract

Claims (29)

1. A protective laminate comprising:

a layer that is breathable, and highly impermeable to chemicals to a degree that is subject to reduction upon flexing of the highly impermeable layer alone, the highly impermeable layer comprising a fluorinated ion exchange polymer;

a first non-textile layer attached to the highly impermeable layer, the first non-textile layer being continuous and mitigating the reduction in the impermeability of the highly impermeable layer if the laminate is flexed; and

a second non-textile layer, wherein the highly impermeable layer is interposed between the non-textile layers.

2. The protective laminate of claim 1 further comprising a textile layer attached to the highly impermeable layer.

3. The protective laminate of claim 1 further comprising a textile layer attached to one of the non-textile layers.

4. The protective laminate of claim 1 wherein at least one non-textile layer comprises a hydrophilic polymer.

5. The protective laminate of claim 1 wherein at least one non-textile layer comprises an elastomeric polymer.

6. The protective laminate of claim 1 wherein at least one non-textile layer comprises a polymer selected from the group consisting of polyurethane, copolyester, polyether block amide, polyamide-elastomer alloy, and mixtures thereof.

7. The protective laminate of claim 1 wherein at least one non-textile layer comprises polyurethane or polyether block amide.

8. The protective laminate of claim 1 wherein the protective laminate has a MVTR of at least 2000.

9. The protective laminate of claim 1 wherein the highly impermeable layer is microporous.

10. The protective laminate of claim 1 wherein the highly impermeable layer is monolithic.

11. The protective laminate of claim 1 wherein at least one non-textile layer is microporous.

12. The protective laminate of claim 1 wherein at least one non-textile layer is monolithic.

13. The protective laminate of claim 1 wherein the highly impermeable layer has a thickness of about 1 to 100 μm.

14. The protective laminate of claim 1 wherein at least one non-textile layer has a thickness of about 1 to 50 μm.

15. The protective laminate of claim 1 further comprising a second highly impermeable layer, wherein the first non-textile layer is interposed between the highly impermeable layers.

16. The protective laminate of claim 1 wherein the at least one non-textile layer comprises a breathable hydrophilic polymer.

17. The protective laminate of claim 16 , wherein the breathable hydrophilic polymer comprises an elastomer.

18. The protective laminate of claim 1 wherein the highly impermeable layer comprises a perfluorinated ion exchange polymer.

19. The protective laminate of claim 1 wherein the fluorinated ion exchange polymer comprises sulfonate functional groups.

20. The protective laminate of claim 19 wherein the sulfonate functional groups are in hydrogen ion or sodium ion form.

21. The protective laminate of claim 1 wherein the protective laminate has a MVTR of at least 200.

22. The protective laminate of claim 1 wherein at least one non-textile layer has a thickness of about 2 to 25 μm.

23. The protective laminate of claim 1 wherein at least one non-textile layer is attached to the highly impermeable layer by being thermally bonded directly to the highly impermeable layer without intervening adhesive.

24. The protective laminate of claim 1 wherein the laminate forms at least a portion of a protective structure, garment, or footwear insert.

25. The protective laminate of claim 24 wherein the protective structure forms at least a portion of a tent.

26. The protective laminate of claim 24 wherein the garment forms at least a portion of a glove.

Assignments (9)