Patent ID: 7842117
Filing Date: 2010-11-30
Classification: B01D,F01N

Abstract:
1. A holding sealer for winding around an exhaust gas processing body of an exhaust gas processing device, said holding sealer comprising: a holding sealer material including mutually intertwined inorganic fibers, said holding sealer material having a first surface and a second surface opposing the first surface, and having a predetermined shape with a length edge extending in a winding direction and a width edge extending from the length edge; a plurality of needling traces where said mutually intertwined inorganic fibers are oriented along a direction of thickness of the holding and sealer material due to a needling process; a first plurality of parallel ditch shaped structures formed on said first surface; and a second plurality of parallel ditch-shaped structures formed on said first surface in a direction substantially perpendicular to the first plurality of ditch shaped structures, wherein said first and second plurality of ditch-shaped structures are each constructed by slit lines which extend in a diagonal direction relative to the length and width edges of the holding sealer material, each ditch shaped structure of the first plurality of parallel ditch-shaped structures is arranged such that the first plurality of parallel ditch-shaped structures has a pitch ranging from 0.5 to 5 per cm, and each ditch shaped structure of the second plurality of parallel ditch-shaped structures is arranged such that the second plurality of parallel ditch-shaped structures has a pitch ranging from 0.5 to 5 per cm so as to retain a stress dispersion capacity.