FIELD: materials.
SUBSTANCE: invention relates to a fibrous sheet having a basis weight between 20 g/m2 and 1,000 g/m2 that disintegrates in water, comprising 10 % to 70 % starch on basis of total weight of dry fibrous sheet, wherein starch is uniformly distributed along thickness of fibrous sheet, including outer surface of said sheet, and for which a) disintegration time in water, measured in accordance with NF Q34-020 standard applied to a specimen of sheet of 9 cm × 8 cm, is less than 50 s, preferably less than 35 s, and more particularly less than 15 s, b) residual strength in wet state relative to its strength in dry state is less than 1 % when measuring according to tests at destruction of ring, which includes following operations: (i) securing on ring-shaped support according to ISO 12192:2002 sample, cut in machine direction, having 15 mm width and 152.4 mm length and immediately before measurement immersed in water for period less than 2 s for measurement in wet state; (ii) placing sample between two plates; (iii) exposing sample to compression force at a rate of 10 mm/min; (iv) recording maximum resistance force.
EFFECT: new material.
21 cl, 2 dwg, 3 tbl
