Holding sealing material, method of winding holding sealing material and exhaust gas purifying apparatus

摘要

An object of the present invention is to provide a holding sealing material (10) wherein projected and recessed portions (13a,13b) fit to each other and thus are prevented from overlapping even though slight displacement occurs due to deformation of the mat (11) when a single mat is rolled around a member to be wrapped or slight displacement between the mats occurs in the width direction when mats are rolled around a member to be wrapped. The holding sealing material (10) of the present invention comprises a mat (11) including an inorganic fibrous material. The mat (11) has a recessed portion (13b) at one of the short sides and a projected portion (13a) at the other of the short sides, whereby the projected and recessed portions should fit to each other when the mat is rolled around the periphery of a member to be wrapped. In the cross-sectional view, the projected portion (13a) is a quadrangle and the recessed portion (13b) is a gap between two quadrangles. At least one corner portion of the projected portion is cut out on the side of the member to be wrapped or another corner portion of the quadrangle of the projected or recessed portions (13a,13b) is cut out.