FIELD: paper.
SUBSTANCE: invention relates to a fibrous cardboard composition for producing a water-dispersible cardboard sheet and a water-dispersible cardboard sheet based thereon, as well as to a dispersible sleeve for a toilet paper roll, obtained on the basis of said cardboard sheet. Fibrous composition of the cardboard contains bleached chemical-thermomechanical pulp (CTMP), bleached sulphate hardwood pulp and bleached sulphate softwood pulp. Content of bleached CTMP ranges from 5 to 15 wt.% of the weight of said fibrous cardboard composition. Content of bleached sulphate softwood cellulose is from 15 to 30 wt.% of the weight of said fibrous cardboard composition. Fibrous composition of the cardboard has a degree of grinding in range from 18° to 23° Schopper-Riegler.
EFFECT: obtaining a water-dispersible cardboard sheet, which has high dispersibility, as well as an optimum ratio of wetting properties, dispersibility and strength of the cardboard.
4 cl, 1 dwg, 1 tbl, 4 ex
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