Multilayer slip resistant sheet material
There is provided a sheet material having a walking surface with high slip resistance. The sheet material has a flexible structural layer laminated to a mesh layer which has interconnected reinforced strands and protruding nodes to impart a high coefficient of friction. The high coefficient of friction of the sheet material provides a roofing underlayment which is safe to walk upon in dry, wet or dusty conditions, and on steeply sloped surfaces. The sheet material may also be used as an industrial wrapping material or a fabric.
1. A sheet material comprising:
a flexible structural layer; and
a mesh layer laminated to the structural layer, the mesh layer having interconnecting strands and nodes protruding from the upper surface of the mesh layer at the junctions of the strands.
2. The sheet material of claim 1 further comprising a lamination layer laminated between the structural layer and the mesh layer.
3. The sheet material of claim 2 wherein the lamination layer comprises a polyolefin.
4. The sheet material of claim 3 wherein the polyolefin comprises low-density polyethylene.
5. The sheet material of claim 3 wherein the polyolefin comprises polypropylene.
6. The sheet material of claim 2 wherein the lamination layer comprises a blend of polyolefins.
7. The sheet material of claim 2 wherein the lamination layer comprises a polymer having a high COF.
8. The sheet material of claim 2 wherein one or more of the layers is treated with ultraviolet stabilizers.
9. The sheet material of claim 2 wherein one or more of the layers is lightly coloured.
10. The sheet material of claim 2 wherein one or more of the layers is treated with a mold inhibitor.
11. The sheet material of claim 2 wherein one or more of the layers is treated with a fire retardant additive.
12. The sheet material of claim 1 wherein the mesh layer is treated with a tacky coating.
13. The sheet material of claim 12 wherein the tacky coating comprises ethylene vinyl acetate copolymer.
14. The sheet material of claim 1 wherein the structural layer comprises woven polyolefin tapes.
15. The sheet material of claim 1 wherein the structural layer comprises a non-woven polyolefin.
16. The sheet material of claim 15 wherein the non-woven polyolefin comprises a spun bond polyolefin.
17. The sheet material of claim 1 wherein the structural layer comprises a woven reinforced membrane substrate.
18. The sheet material claim 17 wherein the substrate is selected from the group consisting of polyethylene terephthalate, nylon and glass.
19. The sheet material of claim 1 wherein the structural layer comprises a non-woven reinforced membrane substrate.
20. The sheet material of claim 19 wherein the substrate is selected from the group consisting of polyethylene terephthalate, nylon and glass.
21. The sheet material of claim 1 for use as an underlayment.
22. The sheet material of claim 1 for use as an industrial wrapping material.
23. The sheet material of claim 1 for use as a fabric.
24. The sheet material of claim 1 further comprising a high COF coating on the lower surface of the structural layer.
25. A roof underlayment, comprising:
a mesh layer having interconnected strands and nodes protruding from the upper surface of the mesh layer at the junctions of the strands;
a flexible structural layer laminated to the mesh layer; and
a high COF film laminated to the lower surface of the structural layer.
26. The roof underlayment of claim 25 further comprising a first lamination layer laminated between the mesh layer and the structural layer and a second lamination layer laminated between the structural layer and the high COF film.
27. The roof underlayment of claim 26 wherein the first or second lamination layer comprises a polyolefin.
28. The roof underlayment of claim 27 wherein the polyolefin comprises low-density polyethylene.
29. The roof underlayment of claim 28 wherein the polyolefin comprises polypropylene.
30. The roof underlayment of claim 26 wherein the first or second lamination layer comprises a blend of polyolefins.
31. The roof underlayment of claim 26 wherein the first or second lamination layer comprises a tacky polymer.
32. The roof underlayment of claim 26 wherein one or more of the layers is treated with ultraviolet stabilizers.
33. The roof underlayment of claim 26 wherein one or more of the layers is lightly coloured.
34. The roof underlayment of claim 26 wherein one or more of the layers is treated with a mold inhibitor.
35. The roof underlayment of claim 26 wherein one or more of the layers is treated with a fire retardant additive.
36. The roof underlayment of claim 25 wherein the mesh layer is treated with a tacky coating.
37. The roof underlayment of claim 36 wherein the tacky coating comprises ethylene vinyl acetate copolymer.
38. The roof underlayment of claim 25 wherein the structural layer comprises woven polyolefin tapes.
39. The roof underlayment of claim 25 wherein the structural layer comprises a non-woven polyolefin.
40. The roof underlayment of claim 39 wherein the non-woven polyolefin comprises a spun bond polyolefin.
41. The roof underlayment of claim 25 wherein the structural layer comprises a woven reinforced membrane substrate.
42. The roof underlayment of claim 41 wherein the substrate is selected from the group consisting of polyethylene terephthalate, nylon and glass.
43. The roof underlayment of claim 25 wherein the structural layer comprises a non-woven reinforced membrane substrate.
44. The roof underlayment of claim 43 wherein the substrate is selected from the group consisting of polyethylene terephthalate, nylon and glass.
45. The roof underlayment of claim 25 wherein the film comprises ethyl vinyl acetate copolymer.
46. A roof underlayment, comprising:
a mesh layer having interconnected strands and nodes protruding from the upper surface of the mesh layer at the junctions of the strands;
a bituminous rubberized asphalt layer laminated to the lower surface of the mesh layer;
an adhesive layer laminated to the lower surface of the asphalt layer; and
a release liner releasably laminated to the lower surface of the adhesive layer.