Colored roofing membrane with improved solar reflectance
Exemplary embodiments of a thermoplastic polyolefin membrane are provided. The colored TPO membrane can have a cap layer having a top color layer and a white sub-layer having a solar reflectance underneath the top color layer, and a core layer underneath the cap layer. The colored TPO roofing membrane can have a reinforcing polyester scrim between the cap layer and the core layer. The white sub-layer can be made up of one or more layers.
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 polyolefin colored topmost layer; and
a thermoplastic polyolefin 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, and fire retardant.
6. The colored roofing membrane according to claim 1 , 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 1 , 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. 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 colored topmost layer having a first solar reflectance; and
a white sub-layer having a second solar reflectance directly underneath and in direct physical contact with the colored topmost layer;
wherein the first solar reflectance is less than the second solar reflectance and
a core layer underneath the cap layer.
11. The colored roofing membrane according to claim 10 , further comprising:
a fabric scrim between the cap layer and the core layer.
12. The colored roofing membrane according to claim 10 , wherein the fabric scrim is a reinforcing polyester scrim.
13. The colored roofing membrane according to claim 10 , wherein the colored topmost layer comprises one or more of cool color pigments, UV stabilizers, and fire retardants.
14. The colored roofing membrane according to claim 10 , wherein the white sub-layer comprises one or more of titanium dioxide pigment, UV stabilizer package, and fire retardant and TPO resins.
15. The colored roofing membrane according to claim 10 , wherein the white sub-layer comprises one or more layers.
16. The colored roofing membrane according to claim 10 , wherein the core layer comprises a dark color.
17. The colored roofing membrane according to claim 10 , wherein the core layer comprises carbon black, titanium dioxide, UV stabilizer packages, fire retardant and TPO resins.
18. The colored roofing membrane according to claim 10 , wherein the thermoplastic polyolefin membrane has a total solar reflectance between 0.48 and 0.64.