Patent ID: 8163250
Filing Date: 2012-04-24
Classification: B32B,F01N

Abstract:
1. A holding sealing material comprising a mat including an inorganic fibrous material, in a plan view, the mat having a basic quadrangular shape consisting of long sides extending in a longitudinal direction and short sides substantially perpendicular to the long sides, the mat having a recessed portion at one of the short sides and having a projected portion at another of the short sides, whereby the projected and recessed portions should fit to each other when the mat is rolled around a periphery of a member to be wrapped, the mat having a first surface configured to be closest to the member when the mat is wrapped around the member, and a second surface opposite to the first surface, and the holding sealing material satisfying any one of following features (A) to (D): (A) in a cross-sectional view perpendicular to the longitudinal direction, the projected portion having a shape of a quadrangle and the quadrangle being cut at least one corner portion on a side of the first surface to form an inclined surface that is inclined with respect to the first and second surfaces; (B) in the cross-sectional view, the recessed portion being a gap between two quadrangles and at least one of the quadrangles being cut at a corner portion closer to the gap on a side of the second surface to form an inclined surface that is inclined with respect to the first and second surfaces; (C) in the cross-sectional view, the projected portion having a shape of a quadrangle and the quadrangle being cut at least one corner portion on a side of the second surface to form an inclined surface that is inclined with respect to the first and second surfaces; and (D) in the cross-sectional view, the recessed portion being a gap between two quadrangles and at least one of the quadrangles being cut at a corner portion closer to the gap on a side of the first surface to form an inclined surface that is inclined with respect to the first and second surfaces.