Patent ID: 9392817
Filing Date: 2016-07-19
CPC Classification: A24D,D21H

Claim Text:
1. A paper that disintegrates quickly in water for use as a cellulose acetate free filter material or filter wrapper paper of a cigarette filter, with the following properties: at least 90% by weight of the paper is formed by pulp fibers, of said pulp fibers, at least 80% by weight consists of a mixture of long fiber pulp and mercerized pulp, wherein the mean fiber length of the long fiber pulp is more than 2 mm, and wherein the long fiber pulp is derived from coniferous wood, wherein 0 to 90% by weight of said mixture consists of mercerized pulp and the rest of long fiber pulp, wherein the pulp fibers of said mixture have a freeness determined according to ISO 5267 of at most 20° SR, wherein in a disintegration test using an apparatus described in TAPPI T 261, the paper exhibits a disintegration of at least 60% after 30 seconds, wherein the paper has a breaking strength according to ISO 1924 of at least 9 N/15 mm, and wherein the paper has a basis weight of 10 to 50 g/m