Abstract: Inorganic fibers including the following composition, SiO2, Al2O3, MgO and CaO being main components, and the inorganic fibers being produced by a melting method: SiO2: 3.0 wt % or more and less than 48.0 wt %, Al2O3: more than 20.0 wt % and 80.0 wt % or less, MgO: 1.0 wt % or more and 50.0 wt % or less, CaO: 1.0 wt % or more and 50.0 wt % or less, and Fe2O3: 0.0 wt % or more and less than 1.0 wt %.

Abstract: Inorganic fibers including the following composition, SiO2, Al2O3, MgO and CaO being main components, and the inorganic fibers being produced by a melting method: SiO2: 3.0 wt % or more and less than 48.0 wt %, Al2O3: more than 20.0 wt % and 80.0 wt % or less, MgO: 1.0 wt % or more and 50.0 wt % or less, CaO: 1.0 wt % or more and 50.0 wt % or less, and Fe2O3: 0.0 wt % or more and less than 1.0 wt %.

Abstract: A composition for inorganic fibers having the following composition ratio and including no solvent: SiO2 1.0 to 54.5 wt %; Al2O3 less than 58.0 wt %; MgO 1.0 to 69.0 wt %; CaO 6.0 wt % or less; and the total of SiO2, Al2O3 and MgO exceeding 94.0 wt %.

Abstract: Inorganic fibers which contain Na2O, SiO2 and Al2O3 as main components and do not react with alumina at 600° C.

Abstract: A method of producing inorganic fibers includes heating and melting an inorganic raw material that includes 70 wt % or more of silica and 10 wt % to 30 wt % of magnesia and calcia in total in a container to obtain a melt having a melt viscosity of 15 poise or less, supplying the melt to a rotor that rotates at an acceleration of 70 km/s2 or more, drawing the melt due to a centrifugal force caused by rotation of the rotor to obtain fibers, blowing the fibers off by blowing air around the rotor, and collecting the fibers to obtain fibers having an average fiber diameter of 5 ?m or less.

Abstract: An inorganic fiber having the following composition: 71 wt % to 80 wt % of SiO2, 18 wt % to 27 wt % of CaO, 0 to 3 wt % of MgO, and 1.1 wt % to 3.4 wt % of Al2O3, wherein the amount of each of ZrO2 and R2O3 (R is selected from Sc, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y or mixtures thereof) is 0.1 wt % or less, the amount of each alkaline metal oxide is 0.2 wt % or less and the total amount of SiO2, CaO, MgO and Al2O3 is 99 wt % or more.

Abstract: An inorganic fiber having the following composition: 71 wt % to 80 wt % of SiO2, 18 wt % to 27 wt % of CaO, 0 to 3 wt % of MgO, and 1.1 wt % to 3.4 wt % of Al2O3, with the proviso that each amount of ZrO2, alkali metal oxides, La2O3, TiO2, ZnO, B2O3 and P2O5 is 0.1 wt % or less, and the total amount of SiO2, CaO, MgO and Al2O3 is 99 wt % or more.

Abstract: Disclosed herein is a bio-soluble inorganic fiber with high tensile strength, manufactured in a method comprising: heating and melting a raw material which includes, on a weight basis, 60 to 80 percent of SiO2, 5 to 20 percent of MgO, 5 to 30 percent of CaO, 0.5 to 5 of Al2O3, and 0.1 to 5 of BaO, at a temperature of 1800 to 2100 degrees Celsius; and exposing the melting material to an air flow for fiber forming.

Abstract: A holding material used for a catalytic converter having a catalyst carrier shaped like a cylinder, a 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 casing, the holding material including a molding of inorganic fibers shaped like a mat or a cylinder, wherein at least an exhaust-gas-inlet-side end portion of the holding material is set to be smaller in basis weight than any other area of the holding material over a predetermined axial length.

Abstract: Disclosed herein is a bio-soluble inorganic fiber with high tensile strength, manufactured in a method comprising: heating and melting a raw material which includes, on a weight basis, 60 to 80 percent of SiO2, 5 to 20 percent of MgO, 5 to 30 percent of CaO, 0.5 to 5 of Al2O3, and 0.1 to 5 of BaO, at a temperature of 1800 to 2100 degrees Celsius; and exposing the melting material to an air flow for fiber forming.

Abstract: A holding material used for a catalytic converter having a catalyst carrier shaped like a cylinder, a 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 casing, the holding material including a molding of inorganic fibers shaped like a mat or a cylinder, wherein at least an exhaust-gas-inlet-side end portion of the holding material is set to be smaller in basis weight than any other area of the holding material over a predetermined axial length.

Abstract: A holding material for a catalytic converter is interposed in a gap between a catalyst carrier and a metal casing receiving the catalyst carrier. The holding material includes a mat including alumina fiber and mullite fiber, wherein the alumina fiber and the mullite fiber are unitarily collected to form the holding material having a predetermined thickness.

Abstract: A holding material for a catalytic converter includes a catalyst carrier, a metal casing for receiving the catalyst carrier, and a holding material interposed in a gap between the catalyst carrier and the metal casing while wound on the catalyst carrier. The holding material is constituted by a molding of inorganic fiber molded with fibrillated fiber into a predetermined shape.

Abstract: A holding material is provided for a catalytic converter having a catalyst carrier, a casing for receiving the catalyst carrier. The holding material is interposed in a gap between the catalyst carrier and the casing while wound on the catalyst carrier. The holding material is constituted by a sewn product of a mat material formed by collection of not smaller than 100 cc/5 g by wet volume of inorganic fiber without use of any binder.