Roofing underlay, particularly for using as roof cladding underlay and/or roof lining membrane

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11407198
APP PUB NO 20200376796A1
SERIAL NO

16497677

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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The invention relates to a roofing underlay (1), especially one intended for use as roof cladding underlay and/or roof lining membrane, having at least one outer nonwoven layer (2), at least one inner nonwoven layer (3) and at least one microporous membrane layer (4) based on at least one polyolefin plastic, wherein the membrane layer (4) is arranged between the outer nonwoven layer (2) and the inner nonwoven layer. According to the invention, it is provided that at least one further microporous membrane layer (5) based on a polyolefin plastic is provided between the outer nonwoven layer (2) and the inner nonwoven layer and the further membrane layer (5) is separated from the membrane layer (4) by a separating layer (6), wherein the separating layer (6) is water-permeable and/or embodied as a structure made of fibers, especially nonwoven.

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First Claim

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Patent Owner(s)

  • EWALD DÖRKEN AG

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bachon, Thomas Düsseldorf, DE 44 196
Flaig, Ronald Leverkusen, DE 3 11

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