Embossed sheet comprising a ply of water-soluble material and method for manufacturing such a sheet
The invention proposes an embossed sheet ( 10 ) comprising at least one ply ( 12 ) of tissue having an embossing pattern comprising at least one series of protuberances ( 18 ) formed projecting from one surface of the said ply ( 12 ) of tissue, and at least one ply joined to the said at least one ply ( 12 ) of tissue and located opposite the said surface of the ply ( 14 ) of water-soluble material, characterized in that the ply ( 14 ) of water-soluble material is joined to the said at least one ply ( 12 ) of tissue at the summits ( 18 a ) of at least part of the protuberances ( 18 ). The invention also proposes a method for manufacturing such a multi-ply sheet ( 10 ).
1. An embossed sheet, comprising:
at least one ply of tissue, comprising an embossing pattern comprising a plurality of protuberances projecting from a surface of the at least one ply of tissue, the protuberances having summits; and
at least one ply of water-soluble material joined to the at least one ply of tissue,
wherein the at least one ply of water-soluble material is joined to the at least one ply of tissue via the summits of at least a portion of the protuberances,
wherein the at least one ply of water-soluble material is joined to the at least one ply of tissue by partial dissolution of the at least one ply of water-soluble material, and
wherein the at least one ply of water-soluble material comprises an at least 90% hydrolyzed polyvinyl alcohol.
2. The embossed sheet of claim 1 , wherein the at least one ply of water-soluble material is configured to be locally dissolved by a water-based liquid.
3. The embossed sheet of claim 2 , wherein the water-based liquid comprises water and an additive.
4. The embossed sheet of claim 2 , wherein the water-based liquid is water.
5. The embossed sheet of claim 1 , wherein the summits are configured to be humidified such that the humidified summits at least partially dissolve the at least one ply of water-soluble material upon contact.
6. The embossed sheet of claim 1 , wherein the at least one ply of water-soluble material is joined to the at least one ply of tissue by adhesion of the water-soluble material to the summits of at least a portion of the protuberances.
7. The embossed sheet of claim 1 , wherein the thickness of the at least one ply of water-soluble material is less than 25 μm.
8. The embossed sheet of claim 1 , wherein the ply of water-soluble material is embossed and comprises a plurality of protuberances.
9. The embossed sheet of claim 1 , wherein the ply of water-soluble material comprises perforations and/or micro-perforations.
10. An embossed sheet comprising:
at least two plies of embossed tissue, wherein each ply of tissue comprises a plurality of protuberances, and wherein the plurality of protuberances comprise summits; and
at least one ply of water-soluble material arranged between the two plies of tissue and joined to the summits of at least a portion of the protuberances on each ply of tissue by partial dissolution of the at least one ply of water-soluble material, wherein the at least one ply of water-soluble material comprises an at least 90% hydrolyzed polyvinyl alcohol.