FILTER PAPER BREAKING DOWN IN WATER QUICKLY Russian patent published in 2017 - IPC D21H27/08 D21H15/06 A24D1/02 A24D3/06 A24D3/10 

FIELD: textile, paper.

SUBSTANCE: paper used as a filter material or a filter wrapping paper for a cigarette filter is made of cellulose fibers for at least 80 wt %, where at least 80 wt % of the said fibers consist of a mixture of long-fiber cellulose and mercerized cellulose. At the same time from 0 to 90 wt % of the said mixture consists of mercerized cellulose, and the remainder consists of long-fiber cellulose, and the grinding degree of the cellulose fibers of the said mixture determined according to ISO 5267 does not exceed 30°SR. During the breaking test with devices described in TAPPI T 261, after 30 seconds the paper is broken down for at least 60%, preferably at least 70% and particularly preferably at least 80%.

EFFECT: invention provides a paper for a cigarette filter, which breaks down in water quickly and is easy to manufacture.

15 cl, 5 ex