Method for the production of a decorative gypsum board
AssigneeMitsui Toatsu Chemicals, Inc.
InventorsShinsaku Kanatsu, Akira Takahara
Life of this patent
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Abstract
In the production of decorative gypsum board, wherein a hemihydrate gypsum slurry is continuously injected between decorative gypsum board card paper and conventional gypsum board card paper and the thus slurry-injected sheets are pressed by a suitable means to form the sheets in a predetermined thickness and then dried to form the decorative gypsum board, the improvement comprising coating with an urethane resin solution over decorative low-weight basis paper such as tissue paper or machine glazed white paper, drying the coated paper and laminating the resultant paper to a gypsum board card paper to obtain said decorative gypsum board card paper.
Claims5
Decorative gypsum board which comprises gypsum sandwiched between sheets of gypsum board card paper, at least one of said sheets comprising a low-weight basis decorative paper coated with 1-5 g/m.sup.2 based upon the solid component of a urethane resin and laminated to gypsum board card paper.
In the production of decorative gypsum board wherein a hemihydrate gypsum slurry is placed between sheets of gypsum board card paper, at least one of which is decorative, and dried to produce said board, the improvement comprising coating low-weight basis decorative paper with a urethane resin in an amount of 1-5 g/m.sup.2 based on the solid component, drying the resin-coated paper, laminating the resultant paper to a gypsum board card paper, and utilizing said laminated paper as the decorative card paper upon which the slurry is placed.
Dependencies are inferred from the claim text.