Nichias Corporation

Kazutaka Murayama

Kiyoshi Sato

Keiji Tsukahara

Jun Oikawa

Hikari Sasaki

Osamu Horiuchi

Nobuya Tomosue

Kazutoshi Isomura

Tatsuro Miki

Kazuki Soeda

Daisuke Ando

Yuuma Tomitsuka

Kei Tsukada

Hironari Fujiki

A porous body including an inorganic fiber and an organic binder, wherein the average fiber diameter of the inorganic fiber is 2.0 μm or less, the amount of the inorganic fiber is 90% by mass or more, the amount of the organic binder is 0.5% by mass or more and 10% by mass or less, the organic binder contains an elastomer, and the bulk density of the porous body is 30 kg/mor less.

Porous body

A soundproofing material including a porous body having a cell structure and including inorganic fibers other than asbestos, wherein an average cell diameter is more than 300 &#x3bc;m and 1000 &#x3bc;m or less, a bulk density is 0.007 to 0.024 g/cm, and a flow resistivity is 170,000 to 2,000,000 Ns/m.

Soundproofing material

A foamed body that is a porous foamed body including inorganic fibers other than asbestos, and having a compressive stress when compressed at normal temperature at a compression ratio of 80% of 0.1 MPa or less and a recovery ratio when compressed at normal temperature at a compression ratio of 80% of 50% or more.

Foam

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

To provide an inorganic fiber that suppresses adverse effects on a human body and living environments, exhibits high biosolubility, and also exhibits excellent heat resistance as a constituent material for a filter material, a sealing material, or the like. The inorganic fiber comprises 30 mass % or more and less than 81 mass % of AlO, more than 19 mass % and 65 mass % or less of MgO and 0 mass % to 40 mass % of SiO, wherein the total content of AlO, MgO and SiOrelative to the entire fiber is 98 mass % or more.

Inorganic fiber and method for manufacturing the same

Provided are inorganic fibers which can exhibit high biosolubility and have excellent heat resistance as the constituting material for a filter material, a sealing material or the like, while exerting minimized effects on the human body or the living environment even when the fibers have an average diameter of 1 &#x3bc;m or less. Inorganic fibers including 35 mass% to 88 mass% of AlO, 3 mass% to 45 mass% of CaO and 5 mass% to 40 mass% of SiO, wherein the total content of AlO, CaO and SiOis 98 mass% or more of the entire fibers.

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Tokyo, Japan

Kazutaka Murayama