Kuraray Co., Ltd.

Takayoshi Hosoya

Hiroyuki Kawai

Tomohiro Hayakawa

Hideo Hayashi

Hideki Kamada

Shinya Inada

Yutaka Hayashi

Kohsuke Togashi

Naotaka Gotoh

Jun Aramaki

Provided is an extra-fine fiber sheet including an extra-fine fiber assembly including extra-fine fibers having an average fiber diameter of 500 nm or smaller. The extra-fine fiber sheet includes an extra-fine fiber assembly. The assembly includes a solvent-spinnable polymer (A) having a weight average molecular weight of 5,000 to 100,000 as a main component and a polymer (B) having a weight average molecular weight equal to or more than 10 times as large as that of the polymer (A) as an accessory component; and the assembly includes constituent fibers having an average fiber diameter of 10 to 500 nm. The polymer (A) may be a non-conductive polymer, and the polymer (B) may be a thickening polymer.

Extra-fine fiber sheet

The present invention relates to a filter material including a sheet-like laminate which includes an ultrafine fiber aggregate layer formed of an aggregate of ultrafine fibers produced by an electrospinning method having an average fiber diameter of not less than 10 nm and not more than 1000 nm, and a base material formed of a nonwoven fabric or a woven fabric constituted from fibers having an average fiber diameter of 1 &#x3bc;m or more, said filter material satisfying all of a plurality of specific requirements, having a capability of collecting or separating &#x3bc;m-order microfine particles with a high accuracy and exhibiting a less pressure loss and a long filtering life, as well as a filter cartridge using the filter material.

Filtration material for filters, and filter cartridge

Provided is a separator for non-aqueous batteries, capable of being usefully used in non-aqueous batteries, and a non-aqueous battery equipped with this separator. The separator for non-aqueous batteries includes: a base layer comprising a fiber aggregate, and an electrolyte-swellable resin layer formed on at least one surface of the base layer, the resin layer comprising a urethane resin (C) obtained by reacting a polyol (A) including a vinyl polymer (a1) and a polyether polyol (a2) with a polyisocyanate (B). The vinyl polymer (a1) has as a main chain a vinyl polymer (a1') having two hydroxyl groups at one of the termini of the main chain, and a polyoxyethylene chain having a number average molecular weight of 200 to 800 as a side chain, the percentage of the polyoxyethylene chain based on the vinyl polymer (a1) being within the range of 70 mass % to 98 mass %.

Separator for non-aqueous batteries and non-aqueous battery equipped with same, and process for manufacturing separator for non-aqueous batteries

Provided is a separator for non-aqueous batteries not only having shutdown property but also achieving both higher output and short-circuit resistance. The separator comprising a laminate comprising: a low melting-point polymer fiber layer (A) having a melting point of 100 to 200&#xb0; C., the low melting-point polymer fiber layer (A) comprising nanofibers having a fiber diameter of 1000 nm or smaller and formed from the low melting-point polymer; and a heat-resistant polymer fiber layer (B) positioned on the low melting-point polymer fiber layer (A) and comprising a high melting-point polymer having a melting point over 200&#xb0; C. or a heat infusible polymer, the heat-resistant polymer fiber layer (B) comprising a mixture of nanofibers having a fiber diameter of 1000 nm or smaller and non-nanofibers having a fiber diameter over 1000 nm and both formed from heat-resistant polymer.

Growing community of inventors

Fujisawa, Japan

Takayoshi Hosoya