Absorbent sheet with unique embossing pattern
A cut or precut absorbent sheet intended in particular for wiping includes at least two plies or groups of plies of creped absorbent paper with a basis weight ranging between 12 and 35 g/m 2 per ply, at least one of the plies having an embossed pattern made up of protrusions directed towards the inside of the sheet and forming cavities between them. Some of the protrusions are distributed over at least one of the plies in such a way as to define portions of curves which in particular form concentric circles around or near the geometric center of the outline of the sheet; and the set of protrusions belonging to one ply of the sheet forms alignments which constitute an embossed pattern with central symmetry with respect to the geometric center of the outline of the sheet.
1. A cut or precut absorbent sheet intended for wiping, comprising:
at least two plies or groups of plies of creped absorbent paper with a basis weight ranging between 12 and 35 g/m2 per ply, at least one of the plies comprising an embossed pattern made up of a plurality of protrusions protruding towards another of the plies of the sheet and forming cavities between the respective plies of the sheet;
wherein some of the protrusions are distributed over at least one of the plies in such a way as to define portions of curves which form concentric circles around or near a geometric center of an outline of the sheet, and in that of the plurality of protrusions belonging to one ply of the sheet forms alignments which constitute an embossed pattern with central symmetry with respect to the geometric center of the of outline of the sheet.
2. The absorbent sheet as claimed in claim 1 , wherein the embossed pattern exhibits symmetry of order 2 .
3. The absorbent sheet as claimed in claim 1 , wherein at least 50% of the protrusions are aligned along curve portions.
4. The absorbent sheet as claimed in claim 1 , wherein the embossed pattern comprises a central zone formed of concentric circles.
5. The absorbent sheet as claimed in claim 1 , wherein the embossed pattern comprises a central zone formed of protrusions aligned in a spiral.
6. The absorbent sheet as claimed in claim 1 , wherein the embossed pattern comprises a central zone, and a complementing zone that complements the central zone and is formed of mutually parallel lines of protrusions.
7. The absorbent sheet as claimed in claim 6 , wherein the lines of protrusions are straight.
8. The absorbent sheet as claimed in claim 6 , wherein the lines of protrusions are curved.
9. The absorbent sheet as claimed in claim 1 , wherein two of the embossed plies are associated with one another in an arrangement of a nested type.
10. The absorbent sheet as claimed in claim 1 , wherein at least two of the plies are associated with one another by adhesive bonding.
11. The absorbent sheet as claimed in claim 1 , wherein the protrusions have a mean density ranging between 2 and 50 per cm2.
12. A roll formed of sheets as claimed in claim 1 , each of the sheets being connected along two of its sides by perforated lines.