▎ 摘　　要

NOVELTY - An ultrathin conductive foam comprises a conductive film and a foam component. The conductive film comprises 5-10 pts. wt. polymethyl methacrylate, 2-5 pts. wt. polybutylene terephthalate fiber, 1-2 pts. wt. crosslinking agent, 1-2 pts. wt. graphene powder, 1-2 pts. wt. silicon dioxide, 2-5 pts. wt. polyvinyl alcohol and 3-5 pts. wt. formaldehyde. The foam component comprises 20-25 pts. wt. 107 silicone rubber, 6-8 pts. wt. vinyl silicone oil, 3-5 pts. wt. antimony trioxide, 2-4 pts. wt. aluminum hydroxide and 10-15 pts. wt. methyl silicone oil. The conductive film is adhered to the surface of the foam component. USE - Ultrathin conductive foam for miniature and thin type electronic device. ADVANTAGE - The ultrathin conductive foam has excellent high-temperature resistance and flame retardance, effectively inhibits short circuits during fire, reduces the spread of fire, and has excellent toughness and rebound resilience provided by the porous structure supported by polybutylene terephthalate short fiber. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the ultrathin conductive foam, which involves (S1) mixing polymethyl methacrylate, polybutylene terephthalate fiber, crosslinking agent, graphene powder and silicon dioxide, blending at the temperature of 150-155℃, cooling to obtain a polymer, and stretching the polymer into a film, (S2) using supercritical carbon dioxide to act on the film to obtain a foamed film with micropores, (S3) mixing polyvinyl alcohol and formaldehyde at 80-85°C and pH of 3-5 to obtain soaking solution and (S5) soaking the foamed film in a soaking solution prepared to obtain a conductive film, and preparation of foam component which involves mixing 107 silicone rubber, vinyl silicone oil, antimony trioxide, sodium hydroxide, methyl silicone oil and a platinum catalyst, and placing the fully mixed material in a drying device at temperature of 120-125℃ for 5-10 minutes to obtain a foam component, cutting the prepared foam component into a required shape and adhering the conductive film on the outer surface of the foam component.