Fujifilm Corporation

Tooru Ogura

Hiroki Sasaki

Yasutomo Goto

Yukihiro Katai

Toshinao Arai

The present invention provides a nanofiber manufacturing method and a nanofiber manufacturing device. A solutionin which a polymer is dissolved in a solvent is supplied from a distal end of a nozzleto form a Taylor coneat a distal end opening. By applying a voltage between the solutionand a collectorusing a power supply portion, an electrospinning jetis sprayed from the Taylor coneto the collector. At the start or stop of electrospinning, a blocking memberis inserted into a spraying areaof the electrospinning jetsuch that an unstable electrospinning jet or unstable nanofibers are received. A product is not manufactured from an unstable electrospinning jet formed at the start or stop of electrospinning, and the manufacturing of a defective product is prevented.

Nanofiber manufacturing method and nanofiber manufacturing device

A void-containing resin molded product consisting of a polymer having crystallinity, wherein the void-containing resin molded product has elongated voids whose longitudinal directions are aligned in one direction, wherein the elongated voids satisfy the expression h(avg)&#x3e;T/100, where h(avg) denotes an arithmetic average of h(i)s which each denote a distance from a surface of the void-containing resin molded product to a center of each of 10 voids whose centers are closer to the surface of the void-containing resin molded product than are centers of any other voids in a cross-section of the void-containing resin molded product that is perpendicular to a direction in which the voids are aligned, the 10 voids being selected from voids in a region defined by one straight line which is parallel to a thickness direction of the void-containing resin molded product and another straight line which is parallel to and distant by 20&#xd7;T from the one straight line; and T denotes an arithmetic average thickness of the cross-section, and wherein the elongated voids have a ratio L/r of 10 or more, where L denotes an average length of the voids (in &#x3bc;m) in a direction in which the voids are aligned, and r denotes an average length of the voids (in &#x3bc;m) in a thickness direction which is perpendicular to the direction in which the voids are aligned.

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Kanagawa, Japan

Tooru Ogura