Colored roofing membrane with improved solar reflectance

1. A colored roofing membrane comprising:

a thermoplastic polyolefin roofing membrane configured to be applied to a roof of a building; comprising:

a cap layer comprising:

a thermoplastic colored topmost layer; and

a thermoplastic white sub-layer directly underneath and in direct physical contact with the colored topmost layer; and

a core layer underneath the cap layer.

2. The colored roofing membrane according to claim 1 , further comprising:

a fabric scrim between the cap layer and the core layer.

3. The colored roofing membrane according to claim 2 , wherein the fabric scrim is a reinforcing polyester scrim.

4. The colored roofing membrane according to claim 1 , wherein the colored topmost layer comprises one or more of cool color pigments, UV stabilizers, and fire retardants.

5. The colored roofing membrane according to claim 1 , wherein the white sub-layer comprises one or more of titanium dioxide pigment, UV stabilizer package, fire retardant and TPO resins.

6. The colored roofing membrane according to claim 5 , wherein the white sub-layer comprises one or more layers.

7. The colored roofing membrane according to claim 1 , wherein the core layer comprises a dark color.

8. The colored roofing membrane according to claim 7 , wherein the core layer comprises carbon black, titanium dioxide, UV stabilizer packages, fire retardant and TPO resins.

9. The colored roofing membrane according to claim 1 , wherein the core layer comprises a light color.

10. The colored roofing membrane according to claim 9 , wherein the core layer comprises titanium dioxide, UV stabilizer packages, fire retardant and TPO resins.

11. A method of manufacturing a colored roofing membrane, the method comprising:

providing a thermoplastic polyolefin roofing membrane configured to be applied to a roof of a building; comprising:

providing a cap layer comprising:

providing a thermoplastic colored topmost layer; and

providing a thermoplastic white sub-layer directly underneath and in direct physical contact with the colored topmost layer; and

providing a core layer underneath the cap layer.

12. The method according to claim 11 , further comprising:

providing a fabric scrim provided between the cap layer and the core layer.

13. The method according to claim 12 , wherein the fabric scrim is a reinforcing polyester scrim.

14. The method according to claim 11 , wherein the colored topmost layer comprises one or more of cool color pigments, UV stabilizers, and fire retardants.

15. The method according to claim 11 , wherein the white sub-layer comprises one or more of titanium dioxide pigment, UV stabilizer package, fire retardant and TPO resins.

16. The method according to claim 15 , wherein the white sub-layer comprises one or more layers.

17. The method according to claim 11 , wherein the core layer comprises a dark color.

18. The method according to claim 17 , wherein the core layer comprises carbon black, titanium dioxide, UV stabilizer packages, fire retardant and TPO resins.

19. The method according to claim 11 , wherein the core layer comprises a light color.

20. The method according to claim 19 , wherein the core layer comprises titanium dioxide, UV stabilizer packages, fire retardant and TPO resins.

21. The colored roofing membrane according to claim 1 , wherein the thermoplastic polyolefin membrane has a total solar reflectance between 0.48 and 0.64.

22. The colored roofing membrane according to claim 1 , wherein the colored topmost layer is thinner than the white sub-layer.

23. The method according to claim 11 , wherein the thermoplastic polyolefin membrane has a total solar reflectance between 0.48 and 0.64.

24. The method according to claim 11 , wherein the colored topmost layer is thinner than the white sub-layer.