a self - bonding conductive wire and methods in which it is made and used . the wire comprises a conductor , an insulator , and a self - bonding outer coating . the self - bonding outer coating is a polyester polyether block copolymer . the insulator is an ethylene / tetrafluoroethylene copolymer , one or more layers of which may be used to insulate the conductor . the self - bonding capabilities of the wire may be activated by heating the wire , causing the outer coating to thermoplastically deform and fuse , allowing for the creation of self - supporting structures such as large bobbin - less coils . the use of the polyester polyether block copolymer for the self - bonding outer coating is superior to other materials , in which significant degradation of qualitative properties following self - bonding is observed , resulting in a superior self - bonding conductive wire .