Roll of sheets of absorbent product of the bathroom tissue type

1. A roll for use as bathroom tissue, formed of a rolled strip of a cellulose-fiber product, said strip comprising:

at least three superposed and associated plies, said strip having a tensile strength R ST across its width ( 1 ) such that a product P of the total thickness E of the strip times its strength R ST is greater than a value obtained when a thickness of 0.75-1.5 mm is multiplied by a tensile strength of 200-500 N/m, E being expressed in mm and R ST in N/m, wherein:

at least one of the plies comprises one of a wet pressed ply or a through air dried ply, another one of the plies comprises the other one of the wet pressed ply or the through air dried ply, and

an exterior one of the plies is formed with a first pattern including a repeating pattern of deep and shallow angular cross-sectional shapes and the other exterior one of the plies is formed with a second pattern including a repeating pattern of shallow wavy cross-sectional shapes.

2. The roll as claimed in claim 1 , further comprising a succession of sheets that can be separated from one another along associated precut lines.

3. The roll as claimed in claim 1 , wherein each ply of which said strip is formed comprises a group of plies.

4. The roll as claimed in claim 1 , wherein a basis weight of said strip ranges between 30 and 150 g/m 2 .

5. The roll as claimed in claim 4 , wherein the basis weight of said strip ranges between 85 and 115 g/m 2 .

6. The roll as claimed in claim 1 , wherein the product P is equal to or greater than 220 mm*N/m.

7. The roll as claimed in claim 1 , wherein at least one external one of the plies comprises a wet pressed ply and an internal one of the plies comprises a through air dried ply.

8. The roll as claimed in claim 7 , wherein the internal one of the plies comprises a single through air dried ply.

9. The roll as claimed in claim 1 , wherein at least one external one of the plies comprises a through air dried ply and an internal one of the plies comprises a wet pressed ply.

10. The roll as claimed in claim 9 , wherein the internal one of the plies comprises a single wet pressed ply.

11. The roll as claimed in claim 1 , wherein an interior one of the plies has a random pattern.

12. A method of forming a bathroom tissue roll that is formed of a rolled strip of a cellulose-fiber product comprising at least three superposed and associated plies, said strip having a tensile strength R ST across its width ( 1 ) such that a product P of the total thickness E of the strip times its strength R ST is greater than a value obtained when a thickness of 0.75-1.5 mm is multiplied by a tensile strength of 200-500 N/m, the method comprising:

forming at least one of the plies using one of wet pressing or through air drying; and

forming another one of the plies using the other one of the wet pressing or the through air drying, the method further comprising:

forming an exterior one of the plies with a first pattern including a repeating pattern of deep and shallow angular cross-sectional shapes; and

forming the other exterior one of the plies with a second pattern including a repeating pattern of shallow wavy cross-sectional shapes.

13. The method as claimed in claim 12 , further comprising:

forming at least one external one of the plies using wet pressing; and

forming an internal one of the plies using through air drying.

14. The method as claimed in claim 13 , wherein the forming of the internal one of the plies comprises using through air drying to form a single ply.

15. The method as claimed in claim 12 , further comprising:

forming at least one external one of the plies using through air drying; and

forming an internal one of the plies using wet pressing.

16. The method as claimed in claim 15 , wherein the forming of the internal one of the plies comprises using wet pressing to form a single ply.