Nichias Corporation

Kazutoshi Isomura

Nobuya Tomosue

Hiroki Nakamura

Kiyoshi Sato

Tadashi Sakane

Junya Sato

Isami Abe

Yuki Takeda

Kazutaka Murayama

Akihiro Nakashima

Junya Satoh

A holding material including: inorganic fibers that include 70 wt % or more of an alumina component an organic binder other than polyacrylamide of which the surface is negatively charged, alumina sol, and polyacrylamide having a weight-average molecular weight of 3,000,000 to 6,000,000, wherein the amount of the alumina sol is 2 to 8 parts by weight relative to 100 parts by weight of the amount of the inorganic fibers, and the amount of the polyacrylamide is 0.01 to 1.0 parts by weight relative to 100 parts by weight of the amount of the inorganic fibers.

Retainer material, manufacturing method thereof, and gas treatment device using the same

A holding material includes a stack of a first mat and a second mat, the first mat including alumina fibers that include 60 wt % or more of alumina and 40 wt % or less of silica, and the second mat including silica fibers that include 60 wt % or more of silica and 40 wt % or less of alumina and having a surface pressure higher than that of the first mat as measured at a gap bulk density of 0.30 g/cm.

Holding material, method for producing same, and gas treatment device using same

Provided are a holding material for a gas treatment device, which is inexpensive, has a simple structure, and exhibits high holding force, a gas treatment device, and a method for manufacturing the same. A holding material for a gas treatment device according to the present invention is a holding material, which is a holding material to be arranged, in a gas treatment device including a treatment structure and a casing for housing the treatment structure, between the treatment structure and the casing, the holding material including silica fibers and an alumina sol in an amount of 3 parts by mass or more in terms of a solid content with respect to 100 parts by mass of the silica fibers.

Holding material for gas treatment device, gas treatment device, and production processes therefor

Provided is a method for producing inorganic fiber including: preparing a spinning raw material liquid which comprises an aluminum source, a calcium source, a silicon source and a spinning auxiliary, in which the content of the spinning auxiliary is, in terms of solid matter, 3 parts by mass or more relative to 100 parts by mass of the total of the aluminum source, the calcium source and the silicon source; spinning the spinning raw material liquid by a sol-gel method to obtain crude inorganic fiber; and firing the crude inorganic fiber to produce inorganic fiber that comprises 35 mass % to 88 mass % of AlO, 3 mass % to 45 mass % of CaO and 5 mass % to 40 mass % of SiOin which the total of AlO, CaO and SiOis 97 mass % or more of the entire fiber.

Inorganic fiber and process for manufacturing same

A holding material for a catalytic converter including a catalyst carrier having an elliptical cross section, a metal casing for receiving the catalyst carrier, and the holding material mounted on the catalyst carrier and interposed in a gap between the catalyst carrier and the metal casing, in which the holding material has a first portion and a second portion, and the first portion in contact with a region of the catalyst carrier, corresponding to 40 to 95% of a major axis centering on an intersection of an ellipse and a minor axis in the elliptical cross section of the catalyst carrier, is larger than the second portion in contact with any other region of the catalyst carrier in basis weight.

Holding material for catalytic converter, method for producing the same, and catalytic converter

The present invention relates to a holding material for a catalytic converter including a catalyst carrier, a metal casing for receiving the catalyst carrier, and the holding material wound around the catalyst carrier and interposed in a gap between the catalyst carrier and the metal casing, the holding material having a plurality of high-density sites which are spaced apart from one another in the holding material, each site having a higher density than sites of the holding material in which the higher density sites are not provided.

Catalytic converter, holding material for catalytic converter and production method thereof

The present invention relates to a holding material for a catalytic converter including a catalyst carrier, a metal casing for receiving the catalyst carrier, and the holding material wound around the catalyst carrier and interposed in a gap between the catalyst carrier and the metal casing, the holding material including a low thermal conductivity layer, in which the low thermal conductivity layer includes: a molded material containing an inorganic powder; or a composite material of a porous substrate with an aerogel.

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Tokyo, Japan

Kazutoshi Isomura