Granted Patent B2

US 11,193,236 · App. 15/017,956 · Granted Dec 7, 2021

Inventor: Brian Andrew Hickie (Hendersonville, TN)

Assignee: AVINTIV Specialty Materials Inc.

D06N3/0059B32B5/022B32B5/26B32B7/04B32B7/10B32B27/12B32B27/18B32B27/32D04H1/56D06N3/0011D06N3/0088D06N3/045B32B2255/02B32B2255/26B32B2262/0253B32B2262/0276B32B2307/724B32B2307/7246B32B2307/7265B32B2307/752B32B2457/00B32B2571/00D10B2321/022

Abstract

Claims (20)

1. A composite comprising:

a first layer comprising a first nonwoven; and

a second layer adjacent to and melt bonded to the first layer, the second layer

comprising a film including an elastomer having a melt flow index of about 10 g/10 mins to about 300 g/10 mins, and a corrosion inhibitor, wherein the film is (i) vapor-permeable, and (ii) substantially water-impermeable,

a third layer adjacent to and melt bonded to the second layer such that the second layer is located between the first layer and the third layer, the third layer comprising a second nonwoven;

wherein the composite has a moisture vapor transmission rate of from about 25 g/m 2 /day to about 1000 g/m 2 /day when measured at about 23° C. and about 50 RH %;

wherein the combination of the elastomer and the corrosion inhibitor impart corrosion protection and breathability to the composite.

2. The composite of claim 1 , wherein one or more of the first nonwoven and the second nonwoven includes a spunbond layer.

3. The composite of claim 1 , wherein the elastomer is present in the second layer in an amount of at least about 50% to about 99%, by weight of the second layer.

4. The composite of claim 1 , wherein the corrosion inhibitor is present in an amount of about 0.5% to about 3%, by weight of the second layer.

5. The composite of claim 1 , wherein the corrosion inhibitor comprises morpholine.

6. The composite of claim 1 , wherein the second layer further comprises a carrier for the corrosion inhibitor.

7. The composite of claim 6 , wherein the carrier for the corrosion inhibitor comprises silica.

8. The composite of claim 1 , wherein the composite has a hydrostatic head of from about 20 cm to about 200 cm.

9. A protective cover comprising the composite of claim 1 .

10. A composite produced by a method comprising extruding a corrosion-inhibiting mixture comprising a propylene-based elastomer having a melt flow index of about 10 g/10 mins to about 300 g/10 mins and a corrosion inhibitor onto a surface of a first nonwoven at an extrusion temperature of from about 170° C. to about 320° C. to form a film layer on the first nonwoven; wherein the film is (i) provided in a non-stretched state, (ii) vapor-permeable, and (iii) substantially water-impermeable, and attaching a second nonwoven to the film such that the film is located between the first nonwoven and the second nonwoven.

11. The composite of claim 1 , wherein the composite comprises an extrusion laminate.

12. The composite of claim 1 , wherein the elastomer comprises a copolymer or ethylene units and propylene units.

13. The composite of claim 1 , wherein the composite has a cross-direction elongation of at least about 120% as determined according to ASTM D5034.

14. The composite of claim 1 , wherein the first nonwoven has a first basis weight and the second nonwoven has a second basis weight, wherein the second basis weight is less than the first basis weight.

Assignments (40)

Continuity (2)