PAPER PULP FOR PRODUCING BASE PAPER FOR IMPREGNATION WITH INCREASED MOISTURE CAPACITY Russian patent published in 2023 - IPC D21H27/18 D21H11/10 D21H11/14 

FIELD: paper industry.

SUBSTANCE: methods for producing special types of paper for impregnation, necessary for the formation of coatings, used in the pulp and paper and furniture industries. Paper pulp for producing base paper for impregnation contains 10-60 wt.% sulphated unbleached softwood pulp with a grinding degree of 18-30° Schopper-Riegler degree, 35-85 wt.% waste paper with grinding degree 20-40° Schopper-Riegler degree, 0-5 wt.% coniferous mechanical mass.

EFFECT: obtaining base paper for impregnation with a specified wet strength and increased moisture capacity, as well as improving the quality of base paper for impregnation while reducing its cost.

1 cl, 2 tbl, 7 ex