The present invention relates to an aqueous barrier coating composition comprising: 50-99.9% by weight of one or more anionic low molecular weight polysaccharide(s) having a degree of polymerization (DP) in the range of 2-12; 0.1-10% by weight of a polycationic polymer; based on the total dry weight of the aqueous barrier coating composition.

A protective barrier well suited for use in sublimation printing is made primarily from cellulose fibers. The protective barrier, which can comprise an uncoated paper, can be used to prevent sublimation inks from bleeding through a fabric onto the printing equipment. The uncoated paper is recyclable and can enter the paper recycle stream. The uncoated paper can contain first cellulose fibers combined and blended with second cellulose fibers that differ in fiber length and/or in the degree of refining. The uncoated paper is constructed to have a relatively low diffusivity.

The invention discloses a method for producing a packaging material and a packaging material suitable for packaging of food and/or liquid. In the method of the invention a first barrier layer, and an optional second barrier layer, is applied on a first side of a paperboard web. The thereby formed barrier coated web is at least partly dried in a first drying step, whereupon an extruded layer is applied onto the partly dried barrier coated web in a second coating step. In accordance with the invention, the first and second coating steps are applied integrated within the same coating line. The application of a first barrier layer and an extrusion coated layer in the same coating line in accordance with the invention has shown to give rise to a packaging material with remarkably good barrier properties, especially gas-, liquid and/or grease barrier properties, for the packaging of food and/or liquid.

The subject matter of the invention is a modified starch, characterized in that it exhibits: ⋅a weight-average molecular weight ranging from 250 000 to 2 000 000 Da; ⋅a solubility, measured according to a test A, ranging from 50 to 85%. The invention also relates to a process for the manufacture of said starch and to the use thereof in the manufacture of an aqueous binder.

The subject matter of the invention is a modified starch, characterized in that it exhibits: ⋅a weight-average molecular weight ranging from 250 000 to 2 000 000 Da; ⋅a solubility, measured according to a test A, ranging from 50 to 85%. The invention also relates to a process for the manufacture of said starch and to the use thereof in the manufacture of an aqueous binder.

A method for manufacturing a paperboard structure includes passing a paperboard substrate through a hot-hard calender to yield a calendered paperboard substrate, the hot-hard calender including a nip defined by a thermo-roller and a counter roller, wherein a contact surface of the thermo-roller is heated to an elevated temperature. The method then includes applying a basecoat to the calendered paperboard substrate to yield a basecoated paperboard substrate, the basecoat includes a basecoat binder and a basecoat pigment blend. The method further includes applying a topcoat to the basecoated paperboard substrate.

A method for manufacturing a paperboard structure includes passing a paperboard substrate through a hot-hard calender to yield a calendered paperboard substrate, the hot-hard calender including a nip defined by a thermo-roller and a counter roller, wherein a contact surface of the thermo-roller is heated to an elevated temperature. The method then includes applying a basecoat to the calendered paperboard substrate to yield a basecoated paperboard substrate, the basecoat includes a basecoat binder and a basecoat pigment blend. The method further includes applying a topcoat to the basecoated paperboard substrate.

A gypsum wallboard panel comprises: a gypsum core; and a paper cover sheet disposed on the gypsum core, the paper cover sheet comprising pulp fiber and an uncooked starch in an amount of at least 2% by weight of the pulp fiber.

A gypsum wallboard panel comprises: a gypsum core; and a paper cover sheet disposed on the gypsum core, the paper cover sheet comprising pulp fiber and an uncooked starch in an amount of at least 2% by weight of the pulp fiber.

The present invention relates to a method for producing a coated cellulosic laminar element for disposable food and/or drinks service packaging and containers, comprising the following steps: (a) performing a first application of an aqueous dispersion of an ethylene compound and an acrylic compound on a single side of the cellulosic laminar element; (b) drying the dispersion applied in a); (c) performing, after the drying, a second application of the ethylene compound and acrylic compound to the ethylene compound and acrylic compound applied in a) on the same side; (d) drying the dispersion applied in c). The present invention also relates to a cellulosic laminar element and to a disposable foods and/or drinks service packaging and containers obtained by means of the method of the present invention.