| 摘要 |
<p>The present invention provides a mat having high shear strength. The mat comprises inorganic fibrous substances intertwined with each other, and has: a first main face; a second main face opposite to the first main face; a first side face; a second side face opposite to the first side face; and multiple intertwined portions each extending from a needle piercing point on the first main face to a corresponding needle piercing point on the second main face, each of the intertwined portions comprising inorganic fibrous substances being more closely intertwined with each other than inorganic fibrous substances in a portion except the intertwined portion, wherein assuming that the mat has a virtual straight line L1 drawn in a direction perpendicular to a thickness direction of the mat, virtual straight lines L2 drawn along first intertwined portions, and virtual straight lines L3 drawn along second intertwined portions in a perspective view of the mat from the first side face to the second side face, then the virtual straight line L1 and the virtual straight lines L2 intersect with each other at an angle ± of less than 90°, the virtual straight line L1 and the virtual straight lines L3 intersect with each other at an angle ² of more than 90°, and the virtual straight lines L2 and the virtual straight lines L3 intersect with each other at a predetermined angle ³.</p> |
