Bitumen roofing composite

Patent metadata

Field	Value
Publication number	US-12146322-B2
Application number	US-202017138128-A
Country	US
Kind code	B2
Filing date	Dec 30, 2020
Priority date	Apr 23, 2020
Publication date	Nov 19, 2024
Grant date	Nov 19, 2024

Abstract

A bitumen roofing composite is described having an upper surface and a lower surface. The bitumen roofing composite contains a first composite bitumen layer and a fire resistant (FR) fleece. The first composite bitumen layer has a first side and a second side and contains a first carrier saturated with bitumen. The FR fleece has a first side and a second side, where the first side of the FR fleece and the second side of the first bitumen composite layer are in intimate contact. The FR fleece contains a plurality of FR staple fibers and a plurality of first char scaffold fibers.

First claim

What is claimed is:

1. A bitumen roofing composite having an upper surface and a lower surface comprising:
a first composite bitumen layer having a first side and a second side, wherein the first composite bitumen layer comprises a first carrier saturated with bitumen, wherein the first carrier is a laid scrim comprising continuous fibers or yarns; and
a fire resistant (FR) fleece having a first side and a second side, wherein the first side of the FR fleece and the second side of the first bitumen composite layer are in intimate contact, wherein the FR fleece comprises a plurality of FR staple fibers and a plurality of first char scaffold fibers, and wherein the FR fleece further comprises a reinforcing scrim, wherein the reinforcing scrim is embedded into the FR fleece and comprises the first char scaffold fibers.

2. The bitumen roofing composite of claim 1 , wherein the second side of the FR fleece forms the lower surface of the bitumen roofing composite.

3. The bitumen roofing composite of claim 1 , wherein the roofing composite further comprises a plurality of granules on the first side of the first bitumen composite layer, wherein the plurality of granules forms the upper surface of the bitumen roofing composite.

4. The bitumen roofing composite of claim 1 , further comprising a second composite bitumen layer having a first side and a second side, wherein the second composite bitumen layer comprises a second carrier saturated with bitumen.

5. The bitumen roofing composite of claim 1 , wherein the first char scaffold fibers are selected from the group consisting of partially oxidized acrylonitrile fibers, silica fibers, and ceramic fibers.

6. The bitumen roofing composite of claim 1 , wherein the FR fleece comprises between about between about 30 and 70% by weight FR staple fibers, between about 20 and 50% by weight char scaffold fibers, and between about 0 and 30% by weight polyester fibers.

7. A roofing system comprising the bitumen roofing composite of claim 2 attached to a roof deck or built-up roof deck, wherein the bitumen roofing composite is oriented such that the lower surface of the bitumen roofing composite faces the roof deck or built-up roof deck.

8. A roofing system comprising the bitumen roofing composite of claim 4 attached to a roof deck or built-up roof deck, wherein the bitumen roofing composite is oriented such that the lower surface of the bitumen roofing composite faces the roof deck or built-up roof deck.

9. The bitumen roofing composite of claim 1 , wherein the first carrier comprises a first carrier scrim.

10. The bitumen roofing composite of claim 1 , wherein the first carrier comprises a first nonwoven mat.

11. The bitumen roofing composite of claim 1 , wherein the first carrier comprises a plurality of yarns.

12. The bitumen roofing composite of claim 1 , wherein the first carrier comprises a first carrier scrim and a first nonwoven mat.

13. The bitumen roofing composite of claim 12 , wherein the first carrier scrim and the first nonwoven mat are attached together.

14. The bitumen roofing composite of claim 12 , wherein the first carrier scrim is embedded into the first nonwoven mat.

15. The bitumen roofing composite of claim 1 , wherein the first carrier comprises a plurality of yarns and a first nonwoven mat.

16. The bitumen roofing composite of claim 15 , wherein the plurality of yarns and the first nonwoven mat are attached together.

17. The bitumen roofing composite of claim 15 , wherein the plurality of yarns is embedded into the first nonwoven mat.

18. The bitumen roofing composite of claim 15 , wherein the first carrier scrim comprises a plurality of glass fibers.

19. The bitumen roofing composite of claim 1 , wherein the FR fleece further comprises a plurality of second char scaffold fibers in a reinforcing scrim embedded into the fleece selected from the group consisting of glass fibers, carbon fibers, partially oxidized acrylonitrile fibers, polyphenylene sulfide fibers, and aramid fibers.

Assignees

• Milliken & Co

Inventors

• Wenstrup David E

Classifications

• B32B3/16

  secured to a flexible backing · CPC title

• B32B5/26

  another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)} · CPC title

• B32B11/04 Primary

  comprising such {bituminous or tarry} substance as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a glass layer B32B17/06)} · CPC title

• B32B5/026

  Knitted fabric · CPC title

• B32B2419/06

  Roofs, roof membranes · CPC title