Patent · US Active

Filter paper that disintegrates quickly in water

US9392817B2 · kind B2 · utility

0Cited by

5References

16Claims

0Family size

Assignee

DELFORTGROUP AG · AT

Inventors

Stefan Bachmann · Heimbuchenthal, DE
Dietmar Volgger · Schwaz, AT
Dieter Möhring · Wattens, AT
Kannika Pesendorfer · Salzburg, AT
Guido Reiter · Wattens, AT

Key dates

Filing date	May 14, 2013
Grant date	Jul 19, 2016
Priority date	—
Expiry date	May 14, 2033

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H27/08
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The invention relates to a paper that disintegrates quickly in water, for use as a filter material or filter wrapper paper of a cigarette filter. At least 80 wt % of the paper is formed by cellulose fibers. Of the cellulose fibers, at least 80 wt % are a mixture of long fiber pulp and mercerized pulp. 0 to 90 wt % of the content of the mixture is formed by mercerized pulp, and the rest is formed by long fiber pulp. The cellulose fibers of the mixture have a freeness of at most 30° SR according to ISO 5267. In the disintegration test using an apparatus as described in TAPPI T 261, the paper exhibits a disintegration of at least 60% after 30 seconds.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.