Daiwabo Holdings Co., Ltd.

Daiwabo Polytec Co., Ltd.

Toshio Kamisasa

Tatsunori Kida

Hiroyuki Yamamoto

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 10&#x3a9;&#xb7;cm or less, and at least one selected from a sea component and a sheath component has a volume specific resistance exceeding 10&#x3a9;&#xb7;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.

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Hyogo, Japan

Toshio Kamisasa