Drainable weather resistive barrier

Patent metadata

Field	Value
Publication number	US-2017198470-A1
Application number	US-201715398905-A
Country	US
Kind code	A1
Filing date	Jan 5, 2017
Priority date	Jan 8, 2016
Publication date	Jul 13, 2017
Grant date	—

Abstract

Drainage promoting fabrics having commercial applications (e.g., housewrap) are provided. The drainage promoting fabric, according to certain embodiments of the invention, includes a weather resistive barrier having an outer surface, and a three-dimensional, non-uniform or non-continuous meltblown layer positioned on the outer surface of the weather resistive barrier. The meltblown layer may comprise meltblown shot, meltblown ropes, or both.

First claim

That which is claimed:

1 . A drainage promoting fabric comprising:
a weather resistive barrier having an outer surface; and a three-dimensional, non-uniform or non-continuous meltblown layer positioned on the outer surface of the weather resistive barrier, said meltblown layer comprising meltblown shot, meltblown ropes, or both.

2 . The drainage promoting fabric according to claim 1 , wherein the drainage promoting fabric comprises a drainage efficiency from about 90% to about 100%.

3 . The drainage promoting fabric according to claim 1 , wherein the drainage promoting fabric comprises a width from about 3 feet to about 10 feet.

4 . The drainage promoting fabric according to claim 1 , wherein the meltblown layer comprises at least one of a polypropylene, an ethylene-propylene impact copolymer blend, or any combination thereof.

5 . The drainage promoting fabric according to claim 1 , wherein the meltblown shot comprises irregularly shaped fibers, wads, or particles.

6 . The drainage promoting fabric according to claim 5 , wherein the meltblown shot, the meltblown rope, or both is randomly and irregularly distributed on the outer surface of the weather resistive barrier.

7 . The drainage promoting fabric according to claim 1 , wherein the meltblown layer comprises an average shot height, rope height, or both from about 0.1 mm to about 1.0 mm.

8 . The drainage promoting fabric according to claim 1 , wherein the meltblown layer comprises a basis weight from about 1 gsm to about 20 gsm.

9 . The drainage promoting fabric according to claim 1 , wherein the meltblown layer further comprises at least one of an anti-microbial additive, an anti-fungal additive, an ultraviolet (UV) stabilizer additive, or any combination thereof.

10 . The drainage promoting fabric according to claim 1 , wherein the weather resistive barrier comprises a film laminated to a fibrous material.

11 . The drainage promoting fabric according to claim 10 , wherein the fibrous material comprises a nonwoven material.

12 . The drainage promoting fabric according to claim 1 , wherein the weather resistive barrier comprises a thickness from about 5 mils to about 20 mils.

13 . The drainage promoting fabric according to claim 1 , wherein the weather resistive barrier comprises a moisture vapor transmission rate (MVTR) from about 5 US perms to about 30 US perms.

14 . A building assembly comprising:
an inner sheathing member; an exterior building material; and a drainage promoting fabric positioned between the inner sheathing member and the exterior building material, wherein the drainage promoting fabric comprises:
a weather resistive barrier having an outer surface; and
a three-dimensional, non-uniform or non-continuous meltblown layer positioned on the outer surface of the weather resistive barrier, said meltblown layer comprising meltblown shot, meltblown ropes, or both.

15 . The building assembly according to claim 14 , wherein the drainage promoting fabric comprises a drainage efficiency from about 90% to about 100%.

16 . The building assembly according claim 14 , wherein the meltblown shot comprises irregularly shaped fibers, wads, or particles, and wherein the meltblown layer comprises an average shot height, rope height, or both from about 0.1 mm to about 1.0 mm.

17 . The building assembly according to claim 14 , wherein the meltblown shot, the meltblown rope, or a combination thereof defines a continuous air gap between the weather resistive barrier and the exterior building material.

18 . The building assembly according to claim 17 , wherein the continuous air gap comprises a height corresponding to the average shot height, rope height, or both.

19 . A process for forming a drainage promoting fabric, the process comprising:
providing a weather resistive barrier; providing a three-dimensional, non-uniform or non-continuous meltblown layer, said meltblown layer comprising meltblown shot, meltblown ropes, or both; and attaching the meltblown layer to the weather resistive barrier.

20 . The process according to claim 19 , wherein attaching the meltblown layer to the weather resistive barrier comprises meltspinning the meltblown layer directly onto the weather resistive barrier.

Assignees

• Avintiv Specialty Materials Inc

Inventors

• Hickie Brian Andrew
• Farell Gregory Wagner

Classifications

• B32B3/10

  characterised by a discontinuous layer, i.e. formed of separate pieces of material · CPC title

• B32B2419/04

  Tiles for floors or walls · CPC title

• B32B2307/7145

  Rot proof, resistant to bacteria, mildew, mould, fungi · CPC title

• B32B21/08

  of synthetic resin · CPC title

• B32B2309/12

  Pressure · CPC title