Liquid board
AssigneeStora Enso Aktiebolag
InventorsKlas Norborg, Mikael Hjerpe, Kajsa van Schalien
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Abstract
The invention relates to liquid board comprising one or more layers of material containing cellulose, one or more of said layers comprising an additive that has the capacity to react with or decompose a disinfectant with which said liquid board is treated, so that a gas is formed that acts as a barrier and thereby prevents the penetration, especially edge penetration, of said disinfectant into the paperboard layer/layers.
Claims7
Liquid board comprising one or more layers of material containing cellulose, characterized in that one or more of said layers comprises an additive that has the capacity to react with or decompose a disinfectant with which said liquid board is treated.
Liquid board according to any of the above claims, characterized in that said additive is present in a quantity of 0.5-10 kg/ton of dry paper, preferably 0.5-5 kg/ton of dry paper, and even more preferredly 1-5 kg/ton of dry paper, in said one or more layers that comprise the additive.
Liquid board according to any of the above claims, characterized in that a first layer of said layers of material containing -cellulose consists of a layer with lower density than other layers of material containing cellulose in the liquid board, this first layer having a higher content of said additive than the other layers do.
Liquid board according to any of the above claims, characterized in that said one or more layers also comprise a second agent, which second agent is suitable for counteracting the penetration, especially edge penetration, of lactic acid into the liquid board, said second agent preferably consisting of a sizing composition comprising at least one hydrophobic, cellulose-reactive hydrophobizing agent and an anionic, cationic or amphoteric polymer.
Liquid board according to any of the above claims, characterized in that said additive is combined with a hydrophobizing agent in said one or more layers, which hydrophobizing agent is suitable for counteracting the penetration, especially edge penetration, of the disinfectant into the liquid board, this hydrophobizing agent preferably consisting of resin size.
Dependencies are inferred from the claim text.