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In a process of producing a stretch sheet, a strip-shaped laminate sheet 10A having an elastically stretchable elastic layer 1 and substantially inelastic, inelastic fiber layers 2 and 3 partially joined to each other at bonds 4 or a strip-shaped fibrous sheet containing an elastic component and a s

In a process of producing a stretch sheet, a strip-shaped laminate sheet 10A having an elastically stretchable elastic layer 1 and substantially inelastic, inelastic fiber layers 2 and 3 partially joined to each other at bonds 4 or a strip-shaped fibrous sheet containing an elastic component and a substantially inelastic component and having embossed regions formed by embossing in parts is stretched in directions starting from the bonds 4 or the embossed regions to obtain a stretch sheet 10. The stretch sheet has raised ridges and recessed grooves extending in the direction perpendicular to the stretch direction, and the bonds 4 or the embossed regions are present in the ridges.

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1. 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 distinc

1. 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; andpassing 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. 2. The process according to claim 1, wherein the laminate sheet is stretched in regions other than the bonds without breaks or separation at the bonds. 3. The process according to claim 1, wherein a pitch of adjacent, meshing, large-diameter segments of opposing corrugated rolls is 2 to 3 times the size of the bonds. 4. The process according to claim 1, wherein top faces of the large-diameter segments of the corrugated rolls contact at least 70% 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 70% in number of the distinct bonds. 5. The process according to claim 1, wherein top faces of large-diameter segments of one corrugated roll contact positions of the laminate sheet at every other bond line, and wherein top faces of large-diameter segments of the other corrugated roll contact positions of the laminate sheet at bond lines located between said every other bond line. 6. The process according to claim 1, wherein the laminate sheet is strip-shaped. 7. The process according to claim 1, wherein said stretching is in a width direction of the laminate sheet, a longitudinal direction of the laminate sheet, or at 45 degrees from a width and longitudinal direction of the laminate sheet. 8. The process according to claim 1, wherein said stretching elongates the substantially inelastic fiber layer to cause non-recoverable extension thereof. 9. A process for producing a stretch sheet comprising: passing a fibrous sheet through a heat embossing unit, the fibrous sheet comprising an elastic component and a substantially inelastic component, and the heat embossing unit forming distinct emboss lines each having distinct embossments; andpassing the heat embossed fibrous 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 embossments during said passing of the fibrous sheet between the corrugated rolls so as to positively stretch the fibrous sheet starting from said at least 40% in number of the distinct embossments. 10. The process according to claim 9, wherein the fibrous sheet is stretched in regions other than the embossments without breaks or separation at the embossments. 11. The process according to claim 9, wherein a pitch of adjacent, meshing, large-diameter segments of opposing corrugated rolls is 2 to 3 times the size of the embossments. 12. The process according to claim 9, wherein top faces of the large-diameter segments of the corrugated rolls contact at least 70% in number of the distinct embossments during said passing of the fibrous sheet between the corrugated rolls so as to positively stretch the fibrous sheet starting from said at least 70% in number of the distinct embossments. 13. The process according to claim 9, wherein top faces of large-diameter segments of one corrugated roll contact positions of the fibrous sheet at every other emboss line, and wherein top faces of large-diameter segments of the other corrugated roll contact positions of the fibrous sheet at emboss lines located between said every other emboss line. 14. The process according to claim 9, wherein the fibrous sheet is strip-shaped. 15. The process according to claim 9, wherein said stretching is in a width direction of the fibrous sheet, a longitudinal direction of the fibrous sheet, or at 45 degrees from a width and longitudinal direction of the fibrous sheet.