FEUILLE FIBREUSE QUI SE DESAGREGE DANS L'EAU, PROCESSUS DE FABRICATION DE LADITE FEUILLE FIBREUSE, NOYAU CONSTITUE DE BANDES DE LADITE FEUILLE FIBREUSE
The invention refers to a fibrous sheet having a basis weight of between 20and 1000 g/m2 that disintegrates in water,comprising 10% to 70% starch on the basis of the total weight of the dryfibrous sheet, the disintegration time in water, measuredin accordance with the NF Q34-020 standard applied to a specimen of the sheetof 9 x 8 cm2, is less than 50 seconds, preferablyless than 35 seconds, and more particularly less than 15 seconds, of which theloss of strength measured in accordance withthe table test as reported in the specification corresponds to the loss ofstrength of a specimen of said sheet forming an angle of atleast 85°, preferably between 88° and 90°, after havingbeing wetted with water for a duration of 6 seconds and/or the residual wetstrength of which relative to its dry strength, as measured according to thering crush test described in the specification, is lessthan 1%. The fibrous sheet of the invention is used for instance for themanufacture of a water disintegrable core in a roll of tissuepaper.
