Composite films for mobile electronic device components

A composite film (CF) having a thickness (T) of less than 0.20 mm, and comprising or consisting of, in that order:

• a layer (L1) of a composition (C);
• a fiber fabric (FF) selected from the group of glass fiber fabric or quartz fiber fabric;
• and
• a layer (L2) of composition (C);
• wherein composition (C) comprises at least one fluoropolymer (FP) in contact with at least one surface of the fiber fabric (FF);
• and
• wherein the fiber fabric (FF) is woven and wherein the fluoropolymer (FP) comprises:
• recurring units derived from tetrafluoroethylene (RTFE);
• recurring units (RF) derived from a fluoromonomer (F) selected from the group of perfluoro(alkyl vinyl ether)s (PAVE), hexafluoropropylene (HFP) and combination of two or more of said fluoromonomers;
• and
• recurring units (RM) derived from at least one monomer (M) selected from the group consisting of (i) monomers comprising a functional group (FG) selected from the group consisting of an hydroxy group, an isocyanate group, a carboxylic acid group and an anhydride group, (ii) chlorotrifluoroethylene (CTFE) and (iii) dichlorodifluoroethylene (R1112);
• and
• with the following proportions expressed in mol %:
• (RTFE):
• at least 75.0 mol %;
• (RF):
• between 0 and 20.0 mol %;
• and
• (RM):
• between 0.01 and 5.0 mol %;
• these proportions in mol % being based on a total amount of moles of recurring units of the fluoropolymer (FP).