Disclosed are methods for sealing paperboard, wherein the sealing is performed by using water-based barrier coating materials applied and dried on the paperboard. According to the method, the heating is performed on uncoated side of the paperboard. Also disclosed is a sealed paperboard product wherein the seal is obtainable by the disclosed method.

Disclosed are methods for sealing paperboard, wherein the sealing is performed by using water-based barrier coating materials applied and dried on the paperboard. According to the method, the heating is performed on uncoated side of the paperboard. Also disclosed is a sealed paperboard product wherein the seal is obtainable by the disclosed method.

A barrier coating composition may include an alcohol-based binder and an inorganic particulate. The barrier coating composition may be used in various ways, including in paper products including the barrier composition, methods of preparing the paper products, articles, particularly food grade packaging formed from the paper products, and packaged products, particularly packaged foodstuffs including the packaging.

A barrier coating composition may include an alcohol-based binder and an inorganic particulate. The barrier coating composition may be used in various ways, including in paper products including the barrier composition, methods of preparing the paper products, articles, particularly food grade packaging formed from the paper products, and packaged products, particularly packaged foodstuffs including the packaging.

A method for enhancing the structural strength of a porous substrate having pores therein is disclosed. The method includes soaking the porous substrate in a solution having a first solvent and at least one polymer dissolved in the first solvent at a specific temperature and pressure, such that the solution is deposited within pores of the porous substrate, soaking the porous substrate in a second solvent, such that the first solvent diffuses into the second solvent, and such that the at least one polymer remains within the pores of the porous substrate, and flushing out the second solvent from the porous substrate.

A method for enhancing the structural strength of a porous substrate having pores therein is disclosed. The method includes soaking the porous substrate in a solution having a first solvent and at least one polymer dissolved in the first solvent at a specific temperature and pressure, such that the solution is deposited within pores of the porous substrate, soaking the porous substrate in a second solvent, such that the first solvent diffuses into the second solvent, and such that the at least one polymer remains within the pores of the porous substrate, and flushing out the second solvent from the porous substrate.

The present invention relates to fibrous non-woven fabrics with asymmetric silica impregnation and methods for their production as well as uses of the non-woven fabrics, in particularly in the field of packaging materials.

The present invention relates to fibrous non-woven fabrics with asymmetric silica impregnation and methods for their production as well as uses of the non-woven fabrics, in particularly in the field of packaging materials.

A method of manufacturing a laminate comprises providing a binder impregnated core layer by impregnating at least one fibrous layer with an aqueous core binder solution having a viscosity in the range 75 cP to 500 cP at a temperature of 20° C. and a bake-out solid content in the range 40 wt % to 85 wt %, in which the aqueous core binder solution comprises (i) at least 25% by dry weight of a) reducing sugar reactant(s) and nitrogen-containing reactant(s) and/or b) curable reaction product(s) of reducing sugar reactant(s) and nitrogen-containing reactant(s); and (ii) between 5% and 15% by weight of a non-aqueous solvent based on the total weight of the aqueous binder solution; providing a semi-finished assembly by assembling the binder impregnated core layer with a surface layer; and applying heat and pressure to the semi-finished assembly to cure the binder in the binder impregnated core layer and secure the core layer and the surface layer together.

A method of manufacturing a laminate comprises providing a binder impregnated core layer by impregnating at least one fibrous layer with an aqueous core binder solution having a viscosity in the range 75 cP to 500 cP at a temperature of 20° C. and a bake-out solid content in the range 40 wt % to 85 wt %, in which the aqueous core binder solution comprises (i) at least 25% by dry weight of a) reducing sugar reactant(s) and nitrogen-containing reactant(s) and/or b) curable reaction product(s) of reducing sugar reactant(s) and nitrogen-containing reactant(s); and (ii) between 5% and 15% by weight of a non-aqueous solvent based on the total weight of the aqueous binder solution; providing a semi-finished assembly by assembling the binder impregnated core layer with a surface layer; and applying heat and pressure to the semi-finished assembly to cure the binder in the binder impregnated core layer and secure the core layer and the surface layer together.