The present disclosure is drawn to a base paper substrate that is cellulose-based and an ink-receiving layer on the base paper substrate. The ink-receiving layer, for example, includes a metal salt, inorganic particulates, a polymeric binder, and an emulsifier including a hydroxylated saturated hydrocarbon block including from 6 to 24 carbon atoms and a hydroxyl group and further includes a polyalkylene oxide block including form 10 to 35 polyalkylene oxide units selected from polyethylene oxide, polypropylene oxide, or a combination thereof.

The present disclosure is drawn to a base paper substrate that is cellulose-based and an ink-receiving layer on the base paper substrate. The ink-receiving layer, for example, includes a metal salt, inorganic particulates, a polymeric binder, and an emulsifier including a hydroxylated saturated hydrocarbon block including from 6 to 24 carbon atoms and a hydroxyl group and further includes a polyalkylene oxide block including form 10 to 35 polyalkylene oxide units selected from polyethylene oxide, polypropylene oxide, or a combination thereof.

An object is to provide heat-sealable paper that is excellent in impact resistance and workability. Provided is heat-sealable paper comprising at least one heat-sealable layer on at least one surface of a paper substrate, wherein in the paper substrate, when a tensile energy absorption in a vertical direction as measured in accordance with JIS P 8113:2006 is defined as X.sub.1, a tensile energy absorption in a horizontal direction as measured in accordance with JIS P 8113:2006 is defined as Y.sub.1, a tensile energy absorption index in a vertical direction as measured in accordance with JIS P 8113:2006 is defined as X.sub.2, and a tensile energy absorption index in a horizontal direction as measured in accordance with JIS P 8113:2006 is defined as Y.sub.2, a geometric mean of X.sub.1 and Y.sub.1 is 120 J/m.sup.2 or more, a ratio of X.sub.1 to Y.sub.1 (X.sub.1/Y.sub.1) is 0.5 or more and 2.0 or less, and a geometric mean of X.sub.2 and Y.sub.2 is 2.0 J/g or more.

An object is to provide heat-sealable paper that is excellent in impact resistance and workability. Provided is heat-sealable paper comprising at least one heat-sealable layer on at least one surface of a paper substrate, wherein in the paper substrate, when a tensile energy absorption in a vertical direction as measured in accordance with JIS P 8113:2006 is defined as X.sub.1, a tensile energy absorption in a horizontal direction as measured in accordance with JIS P 8113:2006 is defined as Y.sub.1, a tensile energy absorption index in a vertical direction as measured in accordance with JIS P 8113:2006 is defined as X.sub.2, and a tensile energy absorption index in a horizontal direction as measured in accordance with JIS P 8113:2006 is defined as Y.sub.2, a geometric mean of X.sub.1 and Y.sub.1 is 120 J/m.sup.2 or more, a ratio of X.sub.1 to Y.sub.1 (X.sub.1/Y.sub.1) is 0.5 or more and 2.0 or less, and a geometric mean of X.sub.2 and Y.sub.2 is 2.0 J/g or more.

A surface treatment composition comprising nanocellulose—such as microfibrillated cellulose (MFC)—and particles is provided. The particles comprise a supporting material and an active material comprising a salt of a multivalent metal. Various products comprising such a surface treatment composition and methods using said compositions are also provided.

The present invention relates to a method for manufacturing coated paperboard suitable for packaging paperboard applications. The method comprises coating a first surface of the paperboard web by applying a) a first coating composition in a precoating unit for forming a precoating layer comprising inorganic mineral pigment particles and least one binder for sealing the first surface of the paperboard web; and b) a second coating composition in a curtain coating unit for forming at least one barrier coating layer on the first surface of the paperboard web; and c) a third coating composition comprising a polymer dispersion in the curtain coating unit for forming at least one heat sealable coating layer on the first surface of the paperboard web. The temperature of the coated paperboard web is controlled and adjusted, and the paperboard web is cooled in at least one cooling unit.

The present invention relates to a method for manufacturing coated paperboard suitable for packaging paperboard applications. The method comprises coating a first surface of the paperboard web by applying a) a first coating composition in a precoating unit for forming a precoating layer comprising inorganic mineral pigment particles and least one binder for sealing the first surface of the paperboard web; and b) a second coating composition in a curtain coating unit for forming at least one barrier coating layer on the first surface of the paperboard web; and c) a third coating composition comprising a polymer dispersion in the curtain coating unit for forming at least one heat sealable coating layer on the first surface of the paperboard web. The temperature of the coated paperboard web is controlled and adjusted, and the paperboard web is cooled in at least one cooling unit.

The invention relates to a copolymer obtained by polymerisation reaction of at least three comonomers: a first anionic monomer, a second monomer comprising an olefin unsaturation, and a third monomer comprising a hydrophobic group. The invention likewise relates to the use of said copolymer as a thickening agent, in particular in aqueous suspensions of mineral particles with high solids content. The copolymer according to the invention makes it possible to improve the compromise between viscosity with high shear gradient and viscosity with low shear gradient, while also improving water retention inside the suspension.

The invention relates to a copolymer obtained by polymerisation reaction of at least three comonomers: a first anionic monomer, a second monomer comprising an olefin unsaturation, and a third monomer comprising a hydrophobic group. The invention likewise relates to the use of said copolymer as a thickening agent, in particular in aqueous suspensions of mineral particles with high solids content. The copolymer according to the invention makes it possible to improve the compromise between viscosity with high shear gradient and viscosity with low shear gradient, while also improving water retention inside the suspension.

Disclosed an ink jet printing paper and a coating color used in preparing the paper, and associated methods for manufacturing the paper and its coating. The coating comprises the following components as raw materials: an anionic pigment, an adhesive and a cationic polymer, wherein the adhesive comprises a silane-modified polyvinyl alcohol. In the inventive ink jet printing paper coating, the raw material cost can be relatively low, the coating color solids content can reach 50% in many embodiments, and the coating can have a good water-retaining property. It can be suitable for large-scale production. In ink jet printing, it can give clear images with high color density, and can meet demanding requirements for high speed commercial ink jet printing.