Water-degradable paper sheet, and tube for a paper roll consisting of such a sheet
A water-degradable paper sheet has a basis weight of 80 to 400 g/m 2 and is dry-formed from paper fibers bound together by a water-soluble binder including starch, the amount of binder in the sheet being 30 to 70%. Additionally, a tube is formed by a cylinder having a wall that includes at least one dry-formed paper sheet including paper fibers bound together by a water-soluble binder.
1. A water-disintegratable paper sheet having a grammage of between 80 and 400 g/m 2 , the water-disintegratable paper sheet comprising:
paper fibres bonded to one another by a water-soluble binder comprising starch, the amount of the binder in the sheet being between 40 and 70% by weight.
2. The water-disintegratable paper sheet according to claim 1 , wherein the binder comprises a mono-, di- or trisaccharide.
3. The water-disintegratable paper sheet according to claim 2 , wherein the binder comprises sucrose.