# US 2014/0227143 A1 · Mat material and exhaust gas purifying apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0227143 A1 - Document ID: US20140227143A1 - Status: Published application - Kind: A1 - Application number: 14/254,790 - Filed: 2014-04-16 - Published: 2014-08-14 - Earliest claimed: 2011-10-21 - Assignees: Ibiden Co., Ltd. - Applicants: Ibiden Co., Ltd. - Inventors: Akihito NISHI - Web page: https://patentgrep.com/patent/US20140227143A1 ## CPC - B01D 53/94: by catalytic processes - C03C 13/00: Fibre or filament compositions (manufacture of fibres or filaments C03B37/00) - C03C 13/06: Mineral fibres, e.g. slag wool, mineral wool, rock wool - C08K 7/14: Glass - D04H 1/4218: Glass fibres - F01N 3/2857: {the mats or gaskets being at least partially made of intumescent material, e.g. unexpanded vermiculite} - Y10T 428/298: Physical dimension - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - D04H: MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL (weaving D03; knitting D04B; braiding D04C; net-making D04G; sewing D05B; tufting D05C; finishing non-woven fabrics D06); FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING {; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION}(non-woven fabrics having an intermediate or external layer of a different kind, e.g. of woven fabric, B32B) - F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A mat material includes glass fibers. The glass fibers include about 52% by weight to about 66% by weight of SiO2, about 9% by weight to about 26% by weight of Al2O2, about 15% by weight to about 27% by weight of CaO, 0% by weight to about 9% by weight of MgO, 0% by weight to about 4% by weight of TiO2, 0% by weight to about 5% by weight of ZnO, and 0% by weight to about 2% by weight of Na2O and K2O in total. The glass fibers are substantially free of B2O3. ## Claims ### Claim 1 A mat material comprising: glass fibers comprising: about 52% by weight to about 66% by weight of SiO2; about 9% by weight to about 26% by weight of Al2O3; about 15% by weight to about 27% by weight of CaO; 0% by weight to about 9% by weight of MgO; 0% by weight to about 4% by weight of TiO2; 0% by weight to about 5% by weight of ZnO; 0% by weight to about 2% by weight of Na2O and K2O in total; and the glass fibers being substantially free of B2O3. ### Claim 2 (depends on 1) The mat material according to claim 1, wherein the glass fibers have an average fiber diameter of about 9 μm to about 15 μm. ### Claim 3 (depends on 1) The mat material according to claim 1, wherein the glass fibers have an average fiber length of about 30 mm to about 120 mm. ### Claim 4 (depends on 1) The mat material according to claim 1, further comprising an organic binder. ### Claim 5 (depends on 4) The mat material according to claim 4, wherein the organic binder comprises at least one of epoxy resins, acrylic resins, rubber resins, and styrene resins. ### Claim 6 (depends on 4) The mat material according to claim 4, wherein the organic binder comprises at least one of acrylic rubber, acrylonitrile-polybutadiene rubber, and styrene-polybutadiene rubber. ### Claim 7 (depends on 4) The mat material according to claim 4, wherein an amount of the organic binder is about 20% by weight or less. ### Claim 8 (depends on 1) The mat material according to claim 1, further comprising an expansive agent. ### Claim 9 (depends on 8) The mat material according to claim 8, wherein the expansive agent comprises at least one of vermiculite, bentonite, bronze mica, perlite, expandable graphite, and expandable fluoromica. ### Claim 10 (depends on 8) The mat material according to claim 8, wherein an amount of the expansive agent is about 5% by weight to about 50% by weight relative to a total weight of the mat material. ### Claim 11 (depends on 1) The mat material according to claim 1, wherein the mat material is produced by needling. ### Claim 12 (depends on 1) The mat material according to claim 1, wherein the mat material is produced by a papermaking method. ### Claim 13 (depends on 1) The mat material according to claim 1, wherein the mat material is to be used as a holding sealing material in an exhaust gas purifying apparatus including a casing, an exhaust gas treating body housed in the casing, and the holding sealing material wound around the exhaust gas treating body and provided between the exhaust gas treating body and the casing. ### Claim 14 (depends on 13) The mat material according to claim 13, wherein the exhaust gas purifying apparatus functions as a urea SCR system. ### Claim 15 An exhaust gas purifying apparatus comprising: a casing; an exhaust gas treating body housed in the casing; and a holding sealing material wound around the exhaust gas treating body and provided between the exhaust gas treating body and the casing, the holding sealing material including a mat material comprising: glass fibers comprising: about 52% by weight to about 66% by weight of SiO2; about 9% by weight to about 26% by weight of Al2O3; about 15% by weight to about 27% by weight of CaO; 0% by weight to about 9% by weight of MgO; 0% by weight to about 4% by weight of TiO2; 0% by weight to about 5% by weight of ZnO; 0% by weight to about 2% by weight of Na2O and K2O in total; and the glass fibers being substantially free of B2O3. ### Claim 16 (depends on 15) The exhaust gas purifying apparatus according to claim 15, wherein the exhaust gas purifying apparatus functions as a urea SCR system. ### Claim 17 (depends on 15) The exhaust gas purifying apparatus according to claim 15, wherein the exhaust gas treating body comprises a catalyst supporting carrier or an exhaust gas filter.