A coreless roll of absorbent sheet products is made of a spirally wound web of absorbent substrate including at least two superposed plies of absorbent substrate, the web of absorbent substrate being wound such as to define an axial hollow passageway centrally positioned relatively to the coreless roll and extending from one edge to another edge of the coreless roll. The web of absorbent substrate further includes a stiffening insert, the stiffening insert being inserted in-between two superposed plies of absorbent substrate, the stiffening insert being positioned such as to line the axial hollow passageway, the stiffening insert having a length such that the stiffening insert extends at least around three quarter of a circumference of the passageway, preferably substantially completely around a circumference of the passageway.

A paper roll and method of manufacturing. The paper roll includes a plurality of sheets spirally wound forming a roll. The roll includes a first end and a second end, wherein the first end forms an inner section. The inner section defines an axial passageway that extends from a first side of the roll to a second side of the roll. An adhesive that can stiffen the inner section joins the plurality of sheets of the first end. The method for manufacturing the paper roll includes winding the plurality of sheets about a low-friction tube to form a roll, applying an adhesive to the plurality of sheets at a first end of the roll forming an inner section having an axial passageway, curing the adhesive configured to stiffen the inner section, and removing the low-friction tube from the roll.

A coreless roll of absorbent sheet products is made of a spirally wound web of absorbent substrate including at least two superposed plies of absorbent substrate, the web of absorbent substrate being wound such as to define an axial hollow passageway centrally positioned relatively to the coreless roll and extending from one edge to another edge of the coreless roll. The web of absorbent substrate further includes a stiffening insert, the stiffening insert being inserted in-between two superposed plies of absorbent substrate, the stiffening insert being positioned such as to line the axial hollow passageway, the stiffening insert having a length such that the stiffening insert extends at least around three quarter of a circumference of the passageway, preferably substantially completely around a circumference of the passageway.

The line for producing tubes made of web-like material, includes a core winder, an unwinder including a rotary device on which there are arranged a first spindle and a second spindle; and a robot adapted to load reels of web-like material onto the unwinder and remove exhausted reels from the unwinder.

A coreless log of convolutely wound web material is formed by directing the web around an applicator roller that is in contact with a first surface of the web. An additive is transferred from a supply roller to the applicator roller over a first distance of the web and stopped over a second distance of the web. The web is directed around at least one further roller that is in contact with the second surface of the web that is opposite the first surface. The web is then wound around an elongated mandrel. The first distance of the web comprises a first set of windings nearest the center of the log, and the second distance of the web comprises a second set of windings wound around and extending radially outward from the first set of windings. The mandrel may then be removed to form the coreless log.