Textile laminate comprising a barrier layer having elastic properties

Patent metadata

Field	Value
Publication number	US-9457205-B2
Application number	US-201113642627-A
Country	US
Kind code	B2
Filing date	Apr 19, 2011
Priority date	Apr 22, 2010
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

The invention relates to a laminate, comprising at least one first textile layer and a second textile layer, wherein the first textile layer or the second textile layer comprises at least one thermally resistant fiber, also comprising at least one barrier layer which is arranged between the first textile layer and the second textile layer and is connected to the respective first textile layer and the respective second textile layer. The first textile layer is designed in the form of a single-bed knitted fabric or double-bed knitted fabric having tuck loops and the second textile layer is designed in the form of a double-bed knitted fabric having no tuck loops. The invention also relates to protective clothing comprising such a laminate.

First claim

The invention claimed is:

1. A laminate comprising:
at least a first textile layer and a second textile layer;
the first textile layer or the second textile layer having at least one heat-resistant fiber; and
at least one barrier layer arranged between the first textile layer and the second textile layer, said barrier layer being joined to the first textile layer and the second textile layer;
the first textile layer being designed in the form of one-bed knitwear with tuck loops or double-bed knitwear with tuck loops and the second textile layer in the form of double-bed knitwear without tuck loops;
wherein the laminate after heating at a temperature of 230° C. for 5 minutes has an elastic stretchiness in the longitudinal direction of at least 50% and an elastic stretchiness in the transverse direction of at least 25%.

2. The laminate according to claim 1 , in which the first textile layer is the double-bed knitwear with tuck loops, and in which the double-bed knitwear is an interlock piqué knit.

3. The laminate according to claim 1 , in which the second textile layer is the double-bed knitwear without tuck loops, and in which the double-bed knitwear is an interlock-right/right knit.

4. The laminate according to claim 1 , in which the one-bed knitwear with tuck loops is a piqué knit.

5. The laminate according to claim 1 , in which the first textile layer and the second textile layer have at least one heat-resistant fiber.

6. The laminate according to claim 1 , in which the laminate after heating at a temperature of 230° C. for 5 minutes has an elastic stretchiness of at least 30% in the transverse direction.

7. The laminate according to claim 1 , in which the laminate after heating at a temperature of 230° C. for 5 minutes has an elastic stretchiness of at least 25% in the longitudinal direction.

8. The laminate according to claim 1 , in which the laminate after heating at a temperature of 230° C. for 5 minutes has an elastic stretchiness in the longitudinal direction of at least 50% with an elastic recovery of at least 80% and an elastic stretchiness in the transverse direction of at least 25% with an elastic recovery of at least 95%.

9. The laminate according to claim 1 , in which the laminate after heating at a temperature of 230° C. for 5 minutes has an elastic stretchiness in the longitudinal direction of at least 70% with an elastic recovery of at least 80% and an elastic stretchiness in the transverse direction of at least 30% with an elastic recovery of at least 95%.

10. The laminate according to claim 1 , in which the heat-resistant fiber is selected from the group consisting of aramids, polyimides, polyamide-imides, cellulose fibers, melamine resins, and polybenzimidazole (PBI).

11. The laminate according to claim 10 , in which the fiber is an aramid fiber.

12. The laminate according to claim 1 , in which the first textile layer and the second textile layer each form a permanently elastic laminate without using a thermoplastic or elastomer yarn.

13. The laminate according to claim 1 , in which the barrier layer is joined to the first textile layer and the second textile layer by means of a discontinuously applied glue.

14. The laminate according to claim 13 , in which the glue is supplied in the form of glue spots or in the form of glue powder.

15. The laminate according to claim 1 , in which the barrier layer is air-impermeable and water vapor-permeable.

16. The laminate according to claim 1 , in which the barrier layer is air-impermeable.

17. The laminate according to claim 1 , in which the barrier layer is liquid-impermeable.

18. The laminate according to claim 1 , in which the barrier layer is water-tight and withstands a water entry pressure of at least 8 kPa (according to EN 20811-1992).

19. The laminate according to claim 1 , in which the barrier layer is wind-tight, water-tight and water vapor-permeable.

20. The laminate according to claim 1 , in which the barrier layer has a water vapor penetration resistance Ret of <20 m 2 Pa/W (ISO 11092).

21. The laminate according to claim 1 , in which the barrier layer has an air permeability of no more than 50 L/m 2 /s (according to ISO 9237-1995).

22. The laminate according to claim 1 , in which the barrier layer is a membrane or film.

23. The laminate according to claim 22 , in which the barrier layer is a porous membrane.

24. The laminate according to claim 22 , in which the membrane is selected from the group consisting of polyolefins, polyesters, polyvinyl chlorides, polyvinylidene chlorides, polyurethane and fluoropolymers.

25. The laminate according to claim 22 , in which the membrane has an ePTFE barrier layer.

26. The laminate according to claim 25 , in which the ePTFE membrane is provided with a continuous closed plastic layer.

27. The laminate according to claim 1 , in which the laminate is designed to be flame-retardant with limited flame propagation according to the requirements of EN ISO 14116:2008.

28. The laminate according to claim 1 , in which
the first textile layer and a second textile layer each have a heat-resistant aramid yarn;
the first textile layer is designed as a piqué knit and the second textile layer is an interlock-right/right knit; and
the barrier layer has an ePTFE membrane, the barrier layer being joined to the first textile layer and the second textile layer by a discontinuously applied glue.

29. A protective clothing having a laminate according to claim 1 .

30. The protective clothing according to claim 29 , which is designed in the form of a coat, jacket, trousers, vest, overalls, hat, balaclava or glove.

Assignees

• John Ruediger
• Zischka Bernd
• Gore W L & Ass Gmbh

Inventors

• John Ruediger
• Zischka Bernd

Classifications

• B32B5/18

  characterised by features of a layer {of} foamed material · CPC title

• B32B5/04

  characterised by a layer being specifically extensible by reason of its structure or arrangement {, e.g. by reason of the chemical nature of the fibres or filaments} · CPC title

• B32B2250/03

  3 layers · CPC title

• B32B27/12

  next to a fibrous or filamentary layer · CPC title

• Y10T442/413

  Including an elastic strand · CPC title