Patent ID: 8647553

Claim:
A process for producing a stretch sheet comprising: passing a laminate sheet through a heat embossing unit, the laminate sheet comprising an elastically stretchable elastic layer and a substantially inelastic fiber layer, and the heat embossing unit forming distinct bond lines each having distinct bonds joining the elastic layer to the inelastic layer; and passing the heat embossed laminate sheet between opposing corrugated rolls positioned downstream the embossing unit, the corrugated rolls each having axially alternating large-diameter segments and small-diameter segments in meshing engagement with each other so that large-diameter segments of one corrugated roll fit with clearance between adjacent large-diameter segments of the other corrugated roll, wherein top faces of the large-diameter segments of the corrugated rolls contact at least 40% in number of the distinct bonds during said passing of the laminate sheet between the corrugated rolls so as to positively stretch the laminate sheet starting from said at least 40% in number of the distinct bonds.