Fluororesin film

A fluororesin film comprising:

• a fluororesin film body which contains hydrophobized silicon oxide-coated metal oxide particles obtained by a production process comprising the following steps (a) to (d) and a fluororesin, and
• a coating film made of a coating film-forming composition containing a resin, formed on one side of the fluororesin film body:
• (a) a step of adding a silicon oxide precursor to a dispersion of metal oxide particles to form a silicon oxide layer on the surface of the metal oxide particles thereby to obtain a dispersion of silicon oxide-coated metal oxide particles;
• (b) a step of adding a compound represented by the following formula (1) or a compound represented by the following formula (2), and a silicon oxide precursor, to the dispersion of silicon oxide-coated metal oxide particles, to obtain a dispersion of primarily hydrophobized silicon oxide-coated metal oxide particles,
• R14-nSi(OR2)n (1)
• R33Si—NH—SiR33 (2)
• (wherein R1 is a C1-9 alkyl group, R2 is an alkyl group, n is an integer of from 1 to 3, and R3 is an alkyl group);
• (c) a step of adding a silanol-protective agent to the dispersion of primarily hydrophobized silicon oxide-coated metal oxide particles to obtain a dispersion of secondarily hydrophobized silicon oxide-coated metal oxide particles;
• and
• (d) a step of drying the secondarily hydrophobized silicon oxide-coated metal oxide particles to obtain hydrophobized silicon oxide-coated metal oxide particles.