Patent ID: 8216427

Claim:
A structuring layer of a structuring belt for structuring a wet fibrous web by means of pressing in a press section of a tissue papermaking machine for manufacturing a high bulk tissue paper web, said structuring layer being non-woven and having a web-carrying side defining a web-contacting surface for cooperating with the fibrous web, said web-contacting surface having depressions or elevations forming a three-dimensional structure of the web-contacting surface, wherein the depressions or elevations, respectively, are distributed over the web-contacting surface and collectively constitute about 20-80% of the area of the web-contacting surface, wherein when the web-contacting surface includes the depressions the web-contacting surface includes a flat continuous top surface area between the depressions and delimiting the depressions, wherein when the web-contacting surfaces includes the elevations the web-contacting surface includes a flat valley surface area between the elevations and delimiting the elevations, and wherein each depression or elevation, respectively, has a dimension l of 0.25-2.5 mm in a first direction in the plane of the top surface area or valley surface area, respectively, a dimension b of 0.25-2.0 mm in a second direction in the plane of the top surface area or valley surface area, respectively, said first and second directions being at right angles to each other, a mean depth or mean height d of 0.05-0.6 mm, and an area a as measured in the plane of the top surface area or valley surface area, respectively, of 0.063-5.0 mm 2 , wherein the structuring layer is water-permeable, and the depressions or elevations are formed within the structuring layer.