▎ 摘　　要

NOVELTY - Olefinic carbon film comprises polyimide film, graphene layer, compounded on the two surfaces of the polyimide film. The thickness of the olefin carbon film is 20-200 microns. The horizontal heat conducting coefficient of the olefin carbon film is 1000-1500w/ (mxK), the vertical heat conducting coefficient of the alkene carbon film is 15-30w/ (mxK). USE - Olefinic carbon film for covering central processing unit. ADVANTAGE - The radiating effect is better and can be better covered on the electronic element or the electronic device. The level and vertical heat conductivity coefficient of the olefin carbon film is higher, the conductive heat is faster; the radiating performance is better and it can realize efficient horizontal radiating and vertical radiating. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing olefinic carbon film, which involves carbonizing the polyimide film processed for 10-14 hours at 1400-1600degrees Celsius, and then graphitizing at 2500-3500degrees Celsius for 15-20 hours and rolling or laminating to obtain the olefin carbon film.