Patent · US Expired

Disintegratable cigarette filter

US6776168B1 · kind B1 · utility

10Cited by

13References

24Claims

0Family size

Assignee

RHODIA ACETOW GMBH · DE

Inventors

Eberhard Teufel · Gundelfingen an der Donau, DE
Gunter Maurer · Neuenbürg, DE
Emmerich Sackers · Glückstadt, DE

Key dates

Filing date	Apr 17, 2002
Grant date	Aug 17, 2004
Priority date	—
Expiry date	Apr 17, 2022

Classification

Technology area (CPC A)Human Necessities
CPC primaryA24D3/10
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

The invention relates to a high performance cigarette filter on the basis of cellulose ester fibers or filaments which can be mechanically disintegrated. The inventive high-performance cigarette filter is characterized in that a) the fiber weight (or filament weight)/draw resistance ratio S based on the filament titer is greater than approximately 0.7, the S value being calculated according to the formula S=(mA/&Dgr;P7.8/dpf[10 m/daPA], wherein mA refers to the fiber weight, &Dgr;P refers to the draw resistance and dpf represents the filament titer and for the draw resistance the value calculated for a diameter of 7.8 mm is inserted, b) the residual crimping value of the filter material does not exceed the value 1.45, c) the fiber weight amounts to maximally 10 mg/mm of the filter length, and d) the hardness of the cigarette filter is higher than approximately 90% filtrona hardness. The inventive filter is characterized by an improved disintegratability under environmental conditions vis-à-vis comparable products.

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