Mat, method for producing the mat, and exhaust gas purifying apparatus

• Main Author: TSUJI HIROMITSU
• Format: Patent
• Language: English
• Published: 24.06.2014
• Subjects: ARTIFICIAL STONE; BLASTING; BRAIDING; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; COTTON-WOOL; ENGINE PLANTS IN GENERAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; KNITTING; LACE-MAKING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; LIGHTING; LIME, MAGNESIA; MACHINES OR ENGINES IN GENERAL; MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL; MECHANICAL ENGINEERING; METALLURGY; NON-WOVEN FABRICS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; REFRACTORIES; SEPARATION; SLAG; STEAM ENGINES; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TEXTILES; TRANSPORTING; TREATMENT OF NATURAL STONE; TRIMMINGS; WADDING; WEAPONS

A mat includes a first main face and a second main face opposite to the first main face. At least two layers include a first layer occupying a first area from the first main face along a thickness direction of the mat. The first layer includes a first long fibrous substance which includes an inorganic fibrous substance. A second layer is adjacent to the first layer. The second layer includes a short fibrous substance which includes an inorganic fibrous substance and which has an average fiber length shorter than an average fiber length of the first long fibrous substance. An intertwined portion extends from the first main face to the second main face. The intertwined portion includes the first long fibrous substance and the short fibrous substance being more closely intertwined with each other than the inorganic fibrous substances in a portion except the intertwined portion.