초록 ▼

The invention relates to a substantially rectangular multi-ply disintegratable absorbent sheet based on tissue which comprises at least three plies, and which has a coefficient KNOVE=RSM×RST×A×G×Exp(12×(E+Ep))×(1/Exp (SP))75 000 where RST=strength in the cross direction of the sheet, in N/mRSM=stren

The invention relates to a substantially rectangular multi-ply disintegratable absorbent sheet based on tissue which comprises at least three plies, and which has a coefficient KNOVE=RSM×RST×A×G×Exp(12×(E+Ep))×(1/Exp (SP))75 000 where RST=strength in the cross direction of the sheet, in N/mRSM=strength in the machine direction of the sheet, in N/mG=basis weight of the sheet in kg/m2 E=thickness of the sheet in mmSp=flexibility of the sheet in NA=absorption of the sheet in kg/m2 EP=mean thickness of one ply of the sheet in mm, EP being greater than 0.115 mm. The invention is also aimed at the process for manufacturing such a sheet and at rolls consisting of said sheets.

대표청구항 ▼

1. A substantially rectangular multi-ply disintegratable absorbent sheet based on tissue comprising at least five plies including two exterior plies and at least three interior plies, each of at least three of the plies in said sheet being in at least one group of plies, each of said at least three

1. A substantially rectangular multi-ply disintegratable absorbent sheet based on tissue comprising at least five plies including two exterior plies and at least three interior plies, each of at least three of the plies in said sheet being in at least one group of plies, each of said at least three plies being joined to another ply by mechanical deformation, characterized in that: the mean thickness of one ply of the sheet is greater than 0.115 mm;the basis weight of said sheet is greater than 0.070 kg/m2; andthe total product thickness exceeds 0.75 mm. 2. The substantially rectangular multi-ply disintegratable absorbent sheet of claim 1 wherein each of the two exterior plies of said sheet are TAD plies. 3. The substantially rectangular multi-ply disintegratable absorbent sheet of claim 2 wherein each said exterior ply is in a group of plies and is joined to another TAD ply by mechanical deformation. 4. The substantially rectangular multi-ply disintegratable absorbent sheet of claim 2 wherein the three interior plies are CWP plies joined together by mechanical deformation. 5. The substantially rectangular multi-ply disintegratable absorbent sheet of claim 4 wherein the three interior plies are joined together by macro-embossing. 6. The substantially rectangular multi-ply disintegratable absorbent sheet of claim 2 wherein each said exterior ply is in a group of plies and is joined to another TAD ply by mechanical deformation and wherein the interior plies are CWP plies joined together by mechanical deformation. 7. The substantially rectangular multi-ply disintegratable absorbent sheet of claim 2 wherein the groups of plies are joined to each other by adhesive. 8. The substantially rectangular multi-ply disintegratable absorbent sheet of claim 2 wherein at least one of said exterior plies bears a micro-embossing pattern comprising at least 30 protrusions per cm2. 9. The substantially rectangular multi-ply disintegratable absorbent sheet of claim 2 wherein each group of plies is embossed independently of the other groups of plies and each bears a distinct embossing pattern. 10. The substantially rectangular multi-ply disintegratable absorbent sheet of claim 2 wherein the groups of plies are joined to each other by knurling. 11. The substantially rectangular multi-ply disintegratable absorbent sheet of claim 1 wherein each of the plies of said sheet are CWP plies and each CWP ply is joined to another CWP ply by mechanical deformation. 12. The substantially rectangular multi-ply disintegratable absorbent sheet of claim 11 wherein the groups of plies are joined to each other by knurling. 13. The substantially rectangular multi-ply disintegratable absorbent sheet of claim 11 wherein each CWP ply is joined to two other CWP plies by mechanical deformation.