Fiber assembly, composite of electro conductive substrate and fiber assembly, and production methods thereof

摘要

The present invention relates to a fiber assembly obtained by electrifying a resin in a melted state by application of voltage between a supply-side electrode and a collection-side electrode so as to extend the resin into an ultrafine composite fiber by electrospinning, and accumulating the ultrafine composite fiber, wherein the ultrafine composite fiber includes at least two polymeric components and the ultrafine composite fiber includes at least one type of composite fiber selected from a sea-island structure composite fiber and a core-sheath structure composite fiber as viewed in fiber cross section, at least one selected from an island component and a core component has a volume specific resistance of 1015Ω·cm or less, and at least one selected from a sea component and a sheath component has a volume specific resistance exceeding 1015Ω·cm. Thereby, the present invention provides a fiber assembly obtained by accumulating an ultrafine composite fiber obtained by electrospinning without the use of any solvent or water as a spinning solution, a composite of an electro conductive substrate and such a fiber assembly, and production methods thereof.

主权项

1. A fiber assembly comprising an ultrafine composite fiber,
wherein the fiber assembly is obtained by electrifying a resin in a melted state by application of voltage between a supply-side electrode and a collection-side electrode so as to extend the resin into the ultrafine composite fiber by electrospinning, and accumulating the ultrafine composite fiber, the ultrafine composite fiber comprises at least two polymeric components, the ultrafine composite fiber comprises at least one type of a composite fiber selected from the group consisting of a sea-island structure composite fiber and a core-sheath structure composite fiber, as viewed in fiber cross section, at least one component selected from an island component in the sea-island structure composite fiber and a core component in the core-sheath structure composite fiber has a volume specific resistance of 1015Ω·cm or less, at least one component selected from a sea component in the sea-island structure composite fiber and a sheath component in the core-sheath structure composite fiber has a volume specific resistance exceeding 1015Ω·cm, the at least one component selected from the core component and the island component is an ethylene-vinyl alcohol copolymer, the at least one component selected from the sheath component and the sea component is a polyolefin, the ultrafine composite fiber has a fiber diameter of 5 μm or less, and the fiber assembly is formed in a sheet form in which portions of the ultrafine composite fibers are thermally bonded to each other by thermal adhesion of the at least one component selected from the sea component and the sheath component.