Fluororesin film
A fluororesin film containing a fluororesin. The fluororesin film has on at least one surface thereof a ten-point average roughness of 0.100 to 1.200 μm and an arithmetic average roughness of 0.010 to 0.050 μm. Further, the fluororesin film has a breakdown strength of 400 V/μm or higher.
1. A fluororesin film comprising a fluororesin,
the fluororesin film having on at least one surface thereof a ten-point average roughness of 0.100 to 1.200 μm and an arithmetic average roughness of 0.010 to 0.050 μm, and the fluororesin film having a breakdown strength of 400 V/μm or higher,
wherein the fluororesin contains a non-crosslinked fluororesin and a crosslinked fluororesin,
wherein the crosslinked fluororesin is present in an amount of 0.01% to 10% by mass relative to the sum of the crosslinked fluororesin and the non-crosslinked fluororesin,
wherein the crosslinked fluororesin is produced by irradiating the non-crosslinked fluororesin with an electron beam, or by adding a cross-linking agent to the non-crosslinked fluororesin and thermosetting or ultraviolet-curing the non-crosslinked fluororesin,
wherein the non-crosslinked fluororesin is a vinylidene fluoride/tetrafluoroethylene copolymer having 5 mol % or more and less than 90 mol % in total of vinylidene fluoride unit relative to 100 mol % in total of the vinylidene fluoride unit and the tetrafluoroethylene unit.
2. The fluororesin film according to claim 1 ,
wherein the fluororesin further contains a copolymerized unit based on an ethylenically unsaturated monomer other than tetrafluoroethylene and vinylidene fluoride.
3. The fluororesin film according to claim 1 , further comprising an inorganic particulate.
4. The fluororesin film according to claim 3 ,
wherein the inorganic particulate is present in an amount of 0.01 to 5 parts by mass relative to 100 parts by mass of the fluororesin.
5. The fluororesin film according to claim 1 ,
wherein the fluororesin film is embossed.
6. The fluororesin film according to claim 1 ,
wherein the fluororesin film is surface-coated.
7. The fluororesin film according to claim 1 ,
wherein the fluororesin film is a biaxially stretched film.
8. The fluororesin film according to claim 1 ,
wherein the fluororesin film has a thickness of 1 to 100 μm.
9. A film for a film capacitor, the film comprising
the fluororesin film according to claim 1 , and
an electrode layer on at least one surface of the fluororesin film.
10. A film capacitor comprising the film for a film capacitor according to claim 9 .