Provided are a flame-proof linerboard and a flame-proof corrugated paperboard in which with a small coating amount, a flame-proof layer is formed on the surface of a general linerboard so as to reduce penetration of the flame-proofing agent, and which are thus low in cost and exhibit high flame-proof performance. A flame-proof corrugated paperboard (21) is produced which includes, as a linerboard (15), a flame-proof paper including a paper layer (11), a flame-proof layer (12) containing a flame-proofing agent and a polymer having a molecular weight of 8,000 or more and 10,000,000 or less, and an overcoat layer (13) for protecting the flame-proof layer (12), the overcoat layer (13) being disposed closer to the surface of the corrugated paperboard than the flame-proof layer (12) is.

The invention relates to a method for producing decorative paper, in which a decorative design in printed onto a paper web. According to the method, a digital printing system is used, the paper web has a grammage of at least 45 g/m.sup.2 and at most 65 g/m.sup.2, a primer is applied to the paper web in a application amount of at least 4 g/m.sup.2 and at most 6 g/m.sup.2, preferably 5 g/m.sup.2, prior to the decorative design being printed on, and the decorative design is printed on with at most 7.5 g/m.sup.2 printing ink.

The present invention relates to a coated paper article with an intermediate basecoat layer comprising high void fraction porous hollow sphere polymer particles (HSPs). HSPs with very small pore area density and high void fraction result in increased optical density at a given print energy in thermal printing applications.

The invention relates to a coated paper, more particularly a translucent coated paper, comprising a base paper and a coating color layer applied thereto, wherein the coating color layer comprising a least one polymer and the coated paper having an opacity in the visible of less than 60%; a method for producing a coated paper of this kind, the use of said coated paper as a packaging material and to packaging comprising the coated paper.

A coating structure for a sheet-like substrate is disclosed including cellulosic fibres and a sheet-like product. The structure includes at least one pre-coat layer and a top coat layer, where the pre-coat layer(s) and the top coat layer include 10-90 weight-% of a styrene (meth)acrylate copolymer which is polymerised in the presence of a stabiliser, and which has a glass transition temperature Tg20 C., preferably 15 C., more preferably 13 C. Furthermore, the pre-coat layer(s) includes a polysaccharide, such as starch, and the top coat layer includes 5-60 weight-% of at least one water-soluble coating binder, which is selected from polysaccharides and polyvinyl alcohols, as well as at most 5.0 weight-% of a cross-linker, which reacts with OH or COOH groups.

The present disclosure provides a coated paper product comprising:a paper substrate comprising a first and second side:a first coating layer on the first side of the paper substrate, wherein the first coating layer comprises ethylene-acrylic acid (EAA) or vinyl acetate acrylate copolymer (VAcA) or styrene-acrylate (SA) or acrylic latex; anda second coating layer on the first coating layer, wherein the second coating layer comprises EAA and talc, and wherein the dry weight ratio of EAA to tale in the second coating layer is between 100:5 and 100:70,wherein the coat weight of the first coating layer is at least 4 g/m.sup.2, andwherein the coat weight of the second coating layer is at least 3 g/m.sup.2.

The present disclosure provides a coated paper product comprising: a paper or paperboard substrate: a barrier coating, wherein the barrier coating comprises graphene and a polyolefin copolymer bearing carboxylic acid moieties, wherein the polyolefin copolymer bearing carboxylic acid moieties preferably is ethylene-acrylic acid copolymer (EAA) or ethylene-methacrylic-acid-copolymer (EMAA) or maleic acid ethylene copolymer (MAE), and wherein the graphene content in the barrier coating is 0.3-3 wt %. There is also provided a coated paper product comprising high surface area graphite flakes having an average particle size of 2-7 m instead of the graphene.

A method of printing an image on a substrate is described. Particularly, a coated covering adhered to a substrate may undergo plasma treatment to facilitate printing an image on the coated covering. Plasma treatment may be used to raise the surface energy of the coated covering to allow for printing an image on the coated covering.

The present invention relates to a coated paper article with an intermediate basecoat layer comprising high void fraction porous hollow sphere polymer particles (HISPs). HSPs with very small pore area density and high void fraction result in increased optical density at a given print energy in thermal printing applications.

The invention relates to a separating base paper, having a mass per unit area of at least 25 g/m.sup.2 and at most 40 g/m.sup.2 and a density of at least 0.90 g/cm.sup.3 and at most 1.15 g/cm.sup.3. The separating base paper comprises at least 50 wt % of long-fiber pulp and is coated on at least one side with at least two coatings. The first coating is located between a paper surface and the second coating. The second coating is a topmost coating and comprises a water-soluble film-forming polymer, nanofibrillated cellulose, microfibrillated cellulose or nanocrystalline cellulose. The Cobb-Unger (120 s) value of the surface having said first and second coatings is at least 0.01 g/m.sup.2 and at most 0.90 g/m.sup.2.