GYPSUM BOARD CONTAINING PAPER WITH HIGH ABSORPTION, AND CORRESPONDING METHODS FOR PRODUCTION THEREOF Russian patent published in 2024 - IPC C04B28/14 E04C2/04 

FIELD: construction.

SUBSTANCE: group of inventions relates to a gypsum panel and a method of making it. Gypsum panel comprises a hardened gypsum core located between a front cover sheet and a back cover sheet, where the hardened gypsum core is formed from a solution containing water, plaster and a salt impurity containing at least 150 ppm of the chloride anion per 1,000,000 parts by weight of the plaster, where the back cover sheet has a Cobb value on the gluing side of at least 2.1 g/100 cm² in accordance with the Cobb test. Method of making gypsum panel includes (a) mixing at least water and plaster having a salt content of at least 150 ppm of chloride anion per 1,000,000 parts by weight of plaster to form a first solution; (b) applying a first solution to form a core of a panel for bonding with a face cover sheet, where the panel core has a first surface and a second surface, where the first surface faces the front cover sheet; (c) applying a back cover sheet for bonding with a second surface of the core panel to form a panel blank, where the back cover sheet has a Cobb value on the gluing side of at least 2.1 g/100 cm² in accordance with the Cobb test; (d) drying the panel blank to obtain a panel.

EFFECT: improved adhesion between the cured gypsum layer and the cover sheet of the panel.

17 cl, 2 dwg, 3 tbl