HOLDING SEAL MATERIAL, PRODUCTION METHOD OF HOLDING SEAL MATERIAL, EXHAUST GAS CLEANING APPARATUS, AND PRODUCTION METHOD OF EXHAUST GAS CLEANING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a holding seal material in which when an exhaust gas treatment body to which the holding seal material is wound is performed by press fitting to a metal casing, that the holding seal material is displaced from the exhaust gas treatment body and protrudes from an end of the metal casing can be prevented, and dispersion of an inorganic fiber can be reduced.SOLUTION: A holding seal material comprises a laminate mat that is configured that two or more mats of a rectangle by a plane view including an inorganic fiber are laminated, and lengths of a longer direction of respective mats become sequentially longer as are laminated, and the holding seal material is characterized in that a film is adhered to a principal plane of an opposite side with a side in which the mat in which a length of a longer direction is the longest contacts to the other mat in principal planes of the mat that composes the laminate mat and in which a length of a longer direction is the longest, and a longer direction flank of the mat in which a length of a longer direction is the longest, and the film is adhered to a principal plane of a side in which the mat in which a length of a longer direction is the longest contacts to the other mat in principal planes of the mat in which a length of a longer direction is the longest in a state in which one part of the principal plane is exposed.