| abstract |
The invention relates to embossing single-ply or multi-ply paper products, for example,npaper towels, tissue and napkins, in which an improved embossing arrangement isnused which is particularly suitable for paper products which have been processednso as to impart undulations whose axes extend in a principal undulatory direction,ntypically in the machine direction. The absorbent sheet typically further includesnundulations which extend in the cross (transverse direction) of the web such thatnthe absorbent sheet has a biaxially undulatory structure. The undulations may benformed by the use of an undulatory creping blade. Defined parametersnaccommodate: the distance at which the undulations are spaced, the total surfacenarea of the design (embossing) elements, the width and length of the embossingnelements and the aspect ratio of the elements, as well as the angular orientation ofnthe embossing elements with respect to the undulations. |