Patent · US Active

Oil-resistant filter wrapper paper

US9115471B2 · kind B2 · utility

6Cited by

7References

9Claims

0Family size

Assignee

DELFORTGROUP AG · AT

Inventors

Roland Zitturi · Innsbruck, AT
Dietmar Volgger · Schwaz, AT
Dieter Möhring · Wattens, AT

Key dates

Filing date	Nov 10, 2014
Grant date	Aug 25, 2015
Priority date	—
Expiry date	Nov 10, 2034

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H17/31
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A method of producing a filter wrapper paper for a smoking article is described. The paper has a content of long-fiber pulp of at least 30 wt %, preferably at least 40 wt %, relative to the pure fiber mass of the paper. The freeness of the long-fiber pulp as per ISO 5267, Schopper-Riegler method, is between 80° SR and 100° SR, preferably between 85° SR and 95° SR. The filter wrapper paper has a filler content of less than 10 wt %, preferably less than 8 wt %, and especially preferably less than 6 wt % relative to the total mass of the paper and is impregnated with a material that is suitable for forming an aqueous composition, more particularly an aqueous solution or an aqueous suspension. The oil-resistance of the filter wrapper paper has a KIT level of at least 4, preferably at least 5, according to TAPPI T559 cm-02.

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