Laminating plastics with graphene drastically changes their heat conduction
Researchers from University of California - Riverside (UCR) report that compressed graphene laminate on PET achieve a higher thermal conductivity compared to non-compressed laminates (for the same average flake size). This is due to better flake alignment.
Graphene has a very high thermal conductivity. At room temperature, a graphene sheet has thermal conductivity of 2000 W/mk to 50000 W/mk. When you place it on a substrate the conductivity is lowered substantially (to around 90 W/mk) - but it is still substantially better than that of plastics.