Water vapour control, which is arranged facing the inside of a building

Patent metadata

Field	Value
Publication number	US-9708810-B2
Application number	US-201214236113-A
Country	US
Kind code	B2
Filing date	Jul 3, 2012
Priority date	Aug 2, 2011
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

Water vapor control, which is arranged facing the inside of a building, comprising a first layer having a water vapor diffusion resistance (sd-value) of 1-5 meters diffusion-equivalent air space width, measured at a relative humidity of an atmosphere surrounding the layer of 30-50%, and having a sd-value of <1 meters diffusion-equivalent air space width, measured at a relative humidity of 60-80%, and a second layer having a sd-value of >0.6 meters diffusion-equivalent air space width, measured at a relative humidity of 80-100%, and wherein the second layer is located at the side of the vapor barrier facing the inside of the building, relative to the position of the first layer.

First claim

The invention claimed is:

1. A vapour barrier for a building comprising a multi-layer water vapour control film comprised of a first layer and a second layer, wherein
the first layer has a water vapour diffusion resistance (Sd-value) of 1-5 meters diffusion-equivalent air space width, measured at a relative humidity of an atmosphere surrounding the first layer of 30-50%, and having a Sd-value of <1 meters diffusion-equivalent air space width, measured at a relative humidity of 60-80%, and wherein
the second layer has a Sd-value of >0.2 meters diffusion-equivalent air space width, measured at a relative humidity of 80-100%, and wherein
the second layer is located at a side of the vapour barrier facing an inside of the building relative to a position of the first layer.

2. The vapour barrier according to claim 1 , wherein second layer has a Sd-value of >0.4 meters diffusion-equivalent air space width, measured at a relative humidity of 80-100%.

3. The vapour barrier according to claim 1 , wherein the second layer has a Sd-value of >0.8 meters diffusion-equivalent air space width, measured at a relative humidity of 80-100%.

4. The vapour barrier according to claim 1 , wherein the second layer has a Sd-value of <3 meters diffusion-equivalent air space width, measured at a relative humidity of 80-100%.

5. The vapour barrier according to claim 1 , wherein the first layer comprises a polyamide.

6. The vapour barrier according to claim 1 , wherein the second layer comprises a polyester or a copolyester.

7. The vapour barrier according to claim 6 , wherein the copolyester of the second layer is a copolyetherester.

8. The water vapour barrier according to claim 1 , wherein the second layer comprises a polymer or copolymer selected from the group consisting of polyolefins, vinyl esters, vinyl ethers, acrylates and polyesters.

9. The water vapour barrier according to claim 8 , wherein the second layer comprises a polymer or copolymer selected from the group consisting of methacrylates, polyethylene terephthalate, polybutylene terephthalate and thermoplastic elastomers comprising hard segments of polyester.

10. The water vapour barrier according to claim 9 , wherein the second layer comprises a polymer or copolymer selected from the group consisting of copolyetheresters, polyurethanes, polyacrylates, polymethacrylates, polyvinylacetates.

11. A vapour barrier for a building comprising a multi-layer water vapour control film comprised of a first layer and a second layer, wherein
the first layer comprises a non-perforated polyamide film having a water vapour diffusion resistance (Sd-value) of 1-5 meters diffusion-equivalent air space width, measured at a relative humidity of an atmosphere surrounding the first layer of 30-50%, and having a Sd-value of <1 meters diffusion-equivalent air space width, measured at a relative humidity of 60-80%, and wherein
the second layer comprises a non-perforated copolyetherester film having a Sd-value of greater than 0.2 meters diffusion-equivalent air space width to less than 2.0 meters diffusion-equivalent air space width, measured at a relative humidity of 80-100%, and wherein
the second layer is located at a side of the vapour barrier facing an inside of the building relative to a position of the first layer.

Assignees

• Tijssen Pascal Maria Hubert Pierre
• Dsm Ip Assets Bv

Inventors

• Tijssen Pascal Maria Hubert Pierre

Classifications

• E04B1/625 Primary

  Sheets or foils allowing passage of water vapor but impervious to liquid water; house wraps · CPC title

• E04D12/002

  Sheets of flexible material, e.g. roofing tile underlay · CPC title

• E04B1/665

  Sheets or foils impervious to water and water vapor · CPC title

• B32B27/34

  comprising polyamides · CPC title

• B32B2250/02

  2 layers · CPC title