US 12,465,084 B2
Thin film heater
Tony Reevell, London (GB); and Eduardo Jose Garcia Garcia, Grand-Saconnex (CH)
Assigned to JT International SA, (CH)
Appl. No. 17/640,155
Filed by JT International SA, Geneva (CH)
PCT Filed Aug. 28, 2020, PCT No. PCT/EP2020/074146
§ 371(c)(1), (2) Date Mar. 3, 2022,
PCT Pub. No. WO2021/043689, PCT Pub. Date Mar. 11, 2021.
Claims priority of application No. 19196021 (EP), filed on Sep. 6, 2019.
Prior Publication US 2022/0312843 A1, Oct. 6, 2022
Int. Cl. A24F 40/46 (2020.01); A24F 40/57 (2020.01); H05B 3/36 (2006.01)
CPC A24F 40/46 (2020.01) [A24F 40/57 (2020.01); H05B 3/36 (2013.01); H05B 2203/013 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A thin film heater configured to be wrapped around a heating chamber of an aerosol generating device, the thin film heater comprising:
a flexible heating element;
a flexible electrically insulating backing film supporting the flexible heating element; and
a flexible electrically insulating film which opposes a first surface of the flexible electrically insulating backing film to at least partially enclose the flexible heating element between the flexible electrically insulating backing film and the flexible electrically insulating film,
wherein:
the flexible electrically insulating backing film comprises one or both of a fluoropolymer or Polyetheretherketone (PEEK),
the thin film heater is sufficiently flexible to allow it to be wrapped into a tubular configuration, and
the flexible electrically insulating film is at least approximately twice a length of the flexible electrically insulating backing film in a wrapping direction,
wherein the flexible electrically insulating backing film further comprises one or more of Polytetrafluoroethylene (PTFE) Perfluoroalkoxy Polymer (PFA), Fluorinated ethylene propylene (FEP), Ethylene tetrafluoroethylene (ETFE), or Polychlorotrifluoroethylene (PCTFE or PTFCE)
wherein one side of the flexible electrically insulating backing film comprises an at least partially defluorinated surface layer.