A method for manufacturing a fibrous web structure, comprising the steps of: defibrating first cellulose pulp dry lap sheets in a first defibrating apparatus, to produce first cellulose pulp fibers; incompletely defibrating second cellulose pulp dry lap sheets in the first defibrating apparatus or a second defibrating apparatus, to produce incompletely defibrated consolidated masses of second cellulose pulp fibers; entraining the first cellulose pulp fibers and the consolidated masses in an air stream; melt spinning first polymer filaments, blending the first polymer filaments with the first cellulose pulp fibers and the consolidated masses in a configuration of co-forming equipment, and directing the blend of first polymer filaments, first cellulose pulp fibers and consolidated masses at the belt, to form a core layer; melt spinning second polymer filaments and directing the second polymer filaments toward the first moving belt or a second moving belt, the first moving belt or the second moving belt carrying the core layer, and directly forming a scrim layer of melt spun polymer filaments directly over the core layer, on one side of the core layer; bringing a second scrim layer comprising third melt spun polymer filaments into facing contact with the core layer on another side of the core layer; and conveying the first scrim layer, core layer, and second scrim layer together into the nip between a pair of calender rollers (49a, 49b), at least one of the calender rollers having thereon a pattern of bonding protrusions, with a source of heat energy supplied at the nip; and compressing the layers in the nip and beneath the bonding protrusions to form a pattern of thermal bonds bonding the scrim layers to, and thereby complete, the fibrous web structure. defibrating first cellulose pulp dry lap sheets in a first defibrating apparatus, to produce first cellulose pulp fibers; incompletely defibrating second cellulose pulp dry lap sheets in the first defibrating apparatus or a second defibrating apparatus, to produce incompletely defibrated consolidated masses of second cellulose pulp fibers; entraining the first cellulose pulp fibers and the consolidated masses in an air stream; melt spinning first polymer filaments, blending the first polymer filaments with the first cellulose pulp fibers and the consolidated masses in a configuration of co-forming equipment, and directing the blend of first polymer filaments, first cellulose pulp fibers and consolidated masses at the belt, to form a core layer; melt spinning second polymer filaments and directing the second polymer filaments toward the first moving belt or a second moving belt, the first moving belt or the second moving belt carrying the core layer, and directly forming a scrim layer of melt spun polymer filaments directly over the core layer, on one side of the core layer; bringing a second scrim layer comprising third melt spun polymer filaments into facing contact with the core layer on another side of the core layer; and conveying the first scrim layer, core layer, and second scrim layer together into the nip between a pair of calender rollers (49a, 49b), at least one of the calender rollers having thereon a pattern of bonding protrusions, with a source of heat energy supplied at the nip; and compressing the layers in the nip and beneath the bonding protrusions to form a pattern of thermal bonds bonding the scrim layers to, and thereby complete, the fibrous web structure.