A self-bonded corrugated web made from a primary pre-bonded web layer of
thermoplastic fibers having a substantially uniform thickness. The
primary pre-bonded web layer is arranged to form corrugations forming a
corrugation pattern of parallel corrugation lines, which can be parallel
to the longitudinal extension of the web. The corrugated web is heat- or
melt-fusion bonded in regions forming a primary bonding pattern of a
plurality of primary bonding pattern lines, which are arranged
non-parallel to the corrugation lines and which intersect at least two of
the corrugation lines, for stabilizing the corrugations.