Patent ID: 9587102
Date: 2017-03-07
CPC Classifications: B32B,C08J,C08K,C08L,H01L,Y02E

Claim:
1. A flame-retardant resin film obtained from a resin composition, wherein the resin composition comprises (a) a polyphenylene ether resin or a mixture consisting of 30 to 99.9% by mass of a polyphenylene ether resin and 0.1 to 70% by mass of a polystyrene resin, (b) a phosphorus flame retardant, and (c) an ethylene-tetrafluoroethylene (FTFE) copolymer resin, the polyphenylene ether resin contains a bonding unit represented by the following formula (1): wherein R 1 ,R 2 , R 3 , and R 4 may be the same or different from each other and each is selected from the group consisting of hydrogen, halogen, a primary or secondary lower alkyl group having 1 to 7 carbon atoms, a phenyl group, a haloalkyl group, an aminoalkyl group, a hydrocarbon oxy group, and a halohydrocarbon oxy group in which a halogen atom and an oxygen atom are separated by at least two carbon atoms, in the resin composition, component (a) is 75 to 98 parts by mass and component (b) is 2 to 25 parts by mass, based on 100 parts by mass of components (a) and (b) in total, fluorine content in the resin composition is 100 to 1000 mass ppm, and the flame-retardant resin film has a thickness of 20 to 500 μm.