Kuraray Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Kuraray Europe Gmbh

Kuraray Specialities Europe Gmbh

Hideo Hayashi

Hiroyuki Kawai

Tomohiro Hayakawa

Takayoshi Hosoya

Shinya Inada

Hideki Kamada

Toshimitsu Harada

Martin Steuer

Taketoshi Okuno

Junichi Asaoka

Masakazu Nishiyama

Yuji Mototani

Kazumasa Kusudo

Tomoaki Kimura

Yutaka Hayashi

Yasurou Araida

Nozomu Sugoh

Shingo Nakanishi

Koichi Kambe

Toshiaki Kobayashi

Soichi Obata

Kohsuke Togashi

Masatoshi Takenoiri

Naotaka Gotoh

Sigehiro Nieda

Yasuhiro Tsugita

Tomoyasu Sonetaka

Ryo Yamamoto

Steuer Martin

Sinya Inada

Provided is a dust scatter preventing agent capable of preventing scattering of dust for a long period of time, by improving the strength of a coating layer formed on a surface of a tailing at a tailing accumulation site. A dust scatter preventing agent comprising an aqueous solution or aqueous dispersion that includes a hydrophilic polymer such as polyvinyl alcohol or a synthetic resin emulsion that has a property of being solidified and that has a contact angle with water of 45 degrees to 78 degrees, and an insoluble fiber material such as vinylon that has a cut length that is within a range of 0.5 mm to 30 mm, and a fineness that is within a range of 0.1 dtex to 20 dtex, with an amount of the insoluble fiber material with respect to the hydrophilic polymer being 0.1 to 1 by mass ratio, is spread over a surface of an object that includes fine particles having a particle size of 100 &#x3bc;m or less and hardened to form a coating layer on the surface of the object.

Dust scatter preventing agent and dust scatter preventing method using same

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

A separator for electric double layer capacitor comprising a fiber sheet containing 10% by mass (relative to 100% by mass of fiber sheet) of polyvinyl alcohol fibers (fibers A) having a hot water-dissolving temperature of lower than 100&#xb0; C. and higher than 85&#xb0; C., the separator having a density within a range of 0.25 to 0.7 g/cm, and a thickness within a range of not less than 5 &#x3bc;m and less than 40 &#x3bc;m.

Separator for electric double layer capacitors, and electric double layer capacitor

Provided are a separator for a nonaqueous cell that has air permeability and is small in thickness while maintaining strength properties; and a nonaqueous cell having this separator. The separator includes a fiber sheet in which a polyvinyl alcohol fiber is incorporated in a proportion of 30% or more by mass (based on the fiber sheet). The fiber has a fiber breaking temperature in heated water of lower than 100&#xb0; C. and higher than 85&#xb0; C.

Separator for nonaqueous cell and nonaqueous cell

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 alkaline batteries which can not only prevent batteries from internal short circuit by inhibiting the dendrite formation at anode, but also enables to have a low electrical resistance. The separator for alkaline batteries comprises a composite sheet in which a base layer comprising a wet-type nonwoven material formed from alkaline resistant fibers is covered with a nanofiber layer comprising a modified polyvinyl alcohol fiber which has a fiber diameter of 10 to 1000 nm and a liquid absorption amount by fibers of 4.0 to 40.0 g/g after immersion in a 35% aqueous solution of KOH.

Separator for alkaline battery, method for producing the same, and battery

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.

Separator for non-aqueous batteries, non-aqueous battery using same, and production method for separator for non-aqueous batteries

Laminates including a nanofiber layer and a base layer, the nanofiber layer comprising polyamide filaments formed from a polyamide (a) and having an average fiber diameter of 10 to 1000 nm, and the base layer comprising fibers at least including polyamide fibers formed from a polyamide (a), where the polyamide (a) comprises a dicarboxylic acid unit and a diamine unit and where (i) the dicarboxylic acid unit comprising a terephthalic acid unit in the proportion of not lower than 60% by mole, and (ii) the diamine unit comprising at least one diamine unit selected from the group consisting of 1,9-nonanediamine unit and 2-methyl-1,8-octanediamine unit in the proportion of not lower than 60% by mole in total are provided, as well as separators for capacitors including the laminates.

Laminate, separator for capacitor, and capacitor

Provided is a planar paper for an adhesive tape, and an adhesive tape utilizing such planar paper as a backing, which has an elongation sufficient to allow the adhesive tape to be favorably adhered to an adherend surface without being accompanied by any lift and separation, but with consistently conforming to the curved surfaces and/or the rough surfaces; which is capable of providing a clear painting line left in a portion of a painted layer required in automobiles; which is capable of being easily cut by hand without requiring any tool as a blade; and which is also excellent in handleability. The planar paper comprises a polyvinyl alcohol-series fiber having a fiber breaking temperature in water of 92 to 125&#xb0; C., a tenacity of 0.5 to 3.5 cN/dtex at 10% elongation, and a breaking elongation of 17 to 60%.

Resinous-substance-impregnated planar paper and adhesive tape using the same

A nonwoven fabric containing a polyvinyl butyral fiber is provided. In particular, continuous fiber nonwoven fabrics, such as a melt-blown nonwoven fabric and a spunbonded nonwoven fabric, are preferred. By laminating a plurality of layers via an adhering layer made of such a nonwoven fabric and then heating, a laminate is obtained by a simple process. In particular, an interior material in which an inorganic fiber layer, a foam layer and a surface material layer are adhered together via the aforementioned type of adhering layers is a desirable embodiment. Such an interior material is excellent in rigidity, sound absorbency and thermal deformation resistance, and therefore is useful as an interior material to be used for cars, railway vehicles, vessels, and the like.

Nonwoven fabrics and laminates made by using the same

A separator for alkaline batteries comprising as at least part of the main fibers a fibrilated product of cellulose fiber obtained by dissolving cellulose in a solvent and depositing cellulose directly. As another main fiber, preferably an extra fine synthetic fiber, particularly preferably a polyvinyl alcohol synthetic fiber is used. The binder is preferably polyvinyl alcohol. Also provided is an alkaline battery wherein such a separator is used. Preferably, the above cellulose fiber is cellulose fiber whose wet Young's modulus is 20 g/d or more and orientation degree .DELTA.n is 42.times.10.sup.-3 or more.

Separator for alkaline batteries

Growing community of inventors

Okayama, Japan

Hideo Hayashi