Loop element of hook/loop fastener and method of making same

A hook-and-loop fastener comprising:

• a hook element comprising a substrate extending generally in a plane and having a face from which projects a multiplicity of hooks;
• and
• a loop element comprised of a fiber web extending in a longitudinal direction and a transverse direction perpendicular thereto, having a face formed with a patterned array of dense bonded regions of a predetermined thickness interspersed with less dense open regions of a predetermined thickness substantially greater than the thickness of the bonded regions, and having a thickness measured transversely to a plane of the directions, the fiber web being formed by a homogenous mixture of first multicomponent filaments and second polyolefinic monocomponent filaments, the first filaments forming in the open regions loops and each formed by a high-melting-point first polymer and a low-melting-point second polyolefinic polymer, the first filaments constituting between 20% and 80% by weight of the homogeneous mixture, the bonded regions being arrayed in a line pattern constituted by a first group of parallel lines and second group of parallel lines extending at an acute angle to the first group of parallel lines to form a plurality of four-sided rhombic cells, the line pattern further having an open elliptically arcuate line in each of the cells tangentially engaging all four sides of the respective cell.