Insulated electrical wire and resin composition
An insulated wire including a conductor (A) and an insulating layer (B) around the conductor (A). The insulating layer (B) contains an aromatic polyetherketone resin (I) and a fluorine-containing copolymer (II) and has a melt viscosity at 60 sec −1 and 390° C. of 0.40 to 0.75 kPa·s. The aromatic polyetherketone resin (I) has a melt viscosity at 60 sec −1 and 390° C. of 0.30 kPa·s or lower. The insulating layer (B) has a thickness of 30 to 300 μm.
1 . An insulated wire comprising:
a conductor (A); and
an insulating layer (B) around the conductor (A),
the insulating layer (B) comprising an aromatic polyetherketone resin (I) and a fluorine-containing copolymer (II) and having a melt viscosity at 60 sec −1 and 390° C. of 0.40 to 0.75 kPa·s,
the aromatic polyetherketone resin (I) having a melt viscosity at 60 sec −1 and 390° C. of 0.30 kPa's or lower,
the insulating layer (B) having a thickness of 30 to 300 μm,
the insulating layer (B) having a ratio by mass (I): (II) of the aromatic polyetherketone resin (I) to the fluorine-containing copolymer (II) of 80:20 to 40:60,
the aromatic polyetherketone resin (I) is selected from the group consisting of a polyetherketoneketone (PEKK) and polyetheretherketone (PEEK),
the fluorine-containing copolymer (II) is a copolymer of tetrafluoroethylene (TFE) and a perfluoroethylenic unsaturated compound represented by the following formula (1);
wherein, in formula (1), Rf 1 is —CF 3 or —ORf 2 ; and Rf 2 is a C1-C5 perfluoroalkyl group.
2 . The insulated wire according to claim 1 ,
wherein the insulating layer (B) has a ratio r2/r1 of 1.60 or lower, wherein r1 represents an average dispersed particle size of the fluorine-containing copolymer (II) and r2 represents an average dispersed particle size of the fluorine-containing copolymer (II) after melt flow rate measurement at 380° C. and a 5000-g load with 5-minute pre-heating in conformity with ASTM D1238.
3 . The insulated wire according to claim 1 ,
wherein the insulated wire has a tensile elongation of 100% or higher.
4 . The insulated wire according to claim 1 ,
wherein the aromatic polyetherketone resin (I) has a melting point of 300° C. to 380° C.
5 . The insulated wire according to claim 1 ,
wherein the aromatic polyetherketone resin (I) has a glass transition temperature of 130° C. to 220° C.
6 . The insulated wire according to claim 1 ,
wherein the fluorine-containing copolymer (II) has a melting point of 200° C. to 323° C.
7 . The insulated wire according to claim 1 ,
wherein the aromatic polyetherketone resin (I) is polyetherketoneketone.
8 . The insulated wire according to claim 1 ,
wherein the perfluoroethylenic unsaturated compound is at least one selected from the group consisting of hexafluoropropylene (HFP), perfluoro (methyl vinyl ether) (PMVE), perfluoro (ethyl vinyl ether) (PEVE), and perfluoro (propyl vinyl ether) (PPVE).
9 . The insulated wire according to claim 8 ,
wherein the fluorine-containing copolymer (II) is at least one selected from the group consisting of a TFE/HFP/PPVE copolymer and a TFE/PPVE copolymer.