ALUMINA FIBER BLANKET, HOLDING MATERIAL FOR EXHAUST GAS PURIFICATION DEVICE, AND EXHAUST GAS PURIFICATION DEVICE

• Main Authors: KAWAHARA KAZUNORI, SHINDO SHINJI, HATA YUSAKU, SADAHIRO TATSUYA, MORITA KANICHI, KIMURA YUSUKE
• Format: Patent
• Language: English; Japanese
• Published: 08.12.2022
• Subjects: BLASTING; BRAIDING; 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; HEATING; KNITTING; LACE-MAKING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL; MECHANICAL ENGINEERING; NON-WOVEN FABRICS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; STEAM ENGINES; TEXTILES; TRANSPORTING; TRIMMINGS; WADDING; WEAPONS

To provide an alumina fiber blanket having less reduction of residual surface pressure even under a high-temperature environment.SOLUTION: In an alumina fiber blanket, when a cross section in a thickness direction is divided into three layers: a first surface layer, a middle layer, and a second surface layer, both a crystallization rate of the first surface layer and a crystallization rate of the second surface layer are higher than a crystallization rate of the middle layer.SELECTED DRAWING: Figure 1 【課題】高温環境下でも残存面圧の低下が小さいアルミナ繊維ブランケットを提供する。【解決手段】厚み方向の断面において、３分割したときの各層を第１表層、中層及び第２表層とした場合、第１表層の結晶化率、及び第２表層の結晶化率がいずれも中層の結晶化率より高いことを特徴とするアルミナ繊維ブランケットである。【選択図】図１