▎ 摘　　要

NOVELTY - Composite gas barrier film comprises, a base film (1), a gas barrier functional layer (2), a bonding layer (3), and a protective film (4); where the base film and the protective film are polymer film, the gas barrier functional layer is a multi layer graphene film (21) or a graphene film superimposed with nanoscale metal film. USE - Used as composite gas barrier film. ADVANTAGE - The composite gas barrier film has reduced liquid and solid leak rate compared to the polymer film sealing and membrane sealing, has excellent thermal conductivity, provides graphene composite structure which improves thermally conductivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the composite gas barrier film, comprising (i) preparing base film, and protective film containing bonding layer; (ii) preparing gas barrier functional layer, where the gas barrier layer is a multi layer graphene film, and the gas barrier functional layer is adhered to base film or protective film containing bonding layer; and (iii) forming a composite structure of gas barrier functional layer with base film or protective film containing bonding layer, and providing an inlet. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the composite gas barrier film. Base film (1) Gas barrier functional layer (2) Bonding layer (3) Protective film (4) Multi layer graphene film (21)