Methods of making and using a self adhering roofing membrane
View Patent ↗A preformed, self adhering single ply roofing membrane includes a water impermeable membrane, a pressure sensitive, hot melt adhesive adhered to one side of the water impermeable membrane, and a release liner on the side of the pressure sensitive, hot melt adhesive opposite of the water impermeable membrane. Methods of making and using this roofing membrane are provided.
1. A process for making a self adhering roofing membrane product, said process comprising:
a) providing a water impermeable single-ply roofing membrane that comprises a thermosetting or thermoplastic material, said single-ply roofing membrane having a thickness of from 0.02 to 0.09 inches, and
b) applying to a primary surface of said single-ply roofing membrane a layer of pressure sensitive adhesive, said adhesive being free of curing agents, said layer being no more than 0.015 inches thick,
thereby providing said self adhering roofing membrane product.
2. The process of claim 1 further comprising applying a release liner over said layer of pressure sensitive adhesive.
3. The process of claim 1 wherein said the application of pressure sensitive adhesive to said single-ply roofing membrane is accomplished by a hot melt spray technique.
4. The process of claim 1 wherein the application of pressure sensitive adhesive to said single-ply roofing membrane is accomplished by a technique that comprises a slot die.
5. The process of claim 1 wherein said single-ply roofing membrane comprises a reinforcing mesh.
6. The process of claim 5 further comprising applying a release liner over said layer of pressure sensitive adhesive.
7. The process of claim 6 wherein said self adhering roofing membrane product is provided in roll form.
8. The process of claim 1 wherein said pressure sensitive adhesive is free of solvents.
9. The process of claim 1 wherein said pressure sensitive adhesive includes a copolymer selected from styrene-isoprene-styrene, styrene-butadiene-styrene, ethylene-propylene, and styrene-ethylene-butene-styrene.
10. The process of claim 9 wherein said pressure sensitive adhesive is free of solvents.
11. The process of claim 10 further comprising applying a release liner over said layer of pressure sensitive adhesive.
12. The process of claim 11 wherein said self adhering roofing membrane product is provided in roll form.
13. The process of claim 1 wherein said single-ply roofing membrane has a width of from 0.5 to 3 feet.
14. The process of claim 1 wherein said single-ply roofing membrane comprises a thermoplastic material.
15. The process of claim 14 wherein said thermoplastic material is PVC.
16. The process of claim 14 wherein said thermoplastic material is TPO.
17. The process of claim 1 wherein said single-ply roofing membrane comprises a thermosetting material.
18. The process of claim 17 wherein said thermosetting material is EPDM.
19. The process of claim 1 wherein said single-ply roofing membrane has a thickness of from 45 to 90 mils.