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1. WO1996005744 - SELECTIVE FILTRATION DEVICE

Publication Number WO/1996/005744
Publication Date 29.02.1996
International Application No. PCT/US1995/009575
International Filing Date 28.07.1995
Chapter 2 Demand Filed 21.03.1996
IPC
A24D 3/16 2006.01
AHUMAN NECESSITIES
24TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
DCIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
3Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
06Use of materials for tobacco smoke filters
16of inorganic materials
A24D 3/10 2006.01
AHUMAN NECESSITIES
24TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
DCIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
3Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
06Use of materials for tobacco smoke filters
08of organic materials as carrier or major constituent
10of cellulose or cellulose derivatives
D01F 2/00 2006.01
DTEXTILES; PAPER
01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
FCHEMICAL FEATURES IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
2Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
D04H 1/46 2012.01
DTEXTILES; PAPER
04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING
1Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
40from fleeces or layers composed of fibres without existing or potential cohesive properties
44the fleeces or layers being consolidated by mechanical means, e.g. by rolling
46by needling or like operations to cause entanglement of fibres
CPC
A24D 3/10
AHUMAN NECESSITIES
24TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
DCIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
3Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
06Use of materials for tobacco smoke filters
08of organic materials as carrier or major constituent
10of cellulose or cellulose derivatives
D01F 2/00
DTEXTILES; PAPER
01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
FCHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
2Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
D04H 1/407
DTEXTILES; PAPER
04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL
1Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
40from fleeces or layers composed of fibres without existing or potential cohesive properties
407containing absorbing substances, e.g. activated carbon
D04H 1/413
DTEXTILES; PAPER
04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL
1Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
40from fleeces or layers composed of fibres without existing or potential cohesive properties
413containing granules other than absorbent substances
D04H 1/425
DTEXTILES; PAPER
04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL
1Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
40from fleeces or layers composed of fibres without existing or potential cohesive properties
42characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
425Cellulose series
D04H 1/4382
DTEXTILES; PAPER
04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL
1Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
40from fleeces or layers composed of fibres without existing or potential cohesive properties
42characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
4382Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
Applicants
  • SCHWEITZER-MAUDUIT INTERNATIONAL, INC. [US/US]; 100 North Point Center East Suite 600 Alpharetta, GA 30202, US
Inventors
  • DOUGLAS, Annmarie, Veronica; US
  • GEER, Robert, Gillette; US
  • MORGAN, Benji, Dawn; US
Agents
  • BONDURA, Stephen, E. ; Dority & Manning, P.A. P.O. Box 1449 Greenville, SC 29602, US
Priority Data
08/294,70123.08.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SELECTIVE FILTRATION DEVICE
(FR) DISPOSITIF DE FILTRATION SELECTIVE
Abstract
(EN)
Disclosed is a filter for tobacco smoke composed of at least one layer of a wet-formed absorbent fibrous nonwoven composite structure containing: 1) from about 30 to about 65 percent by weight, of pulp fibers forming a matrix having a first exterior surface and a second exterior surface, and 2) about 35 to about 70 percent by weight, of activated carbon integrated into the matrix of pulp fibers such that the concentration of activated carbon adjacent the first exterior surface is at least about 60 percent, as determined by optical image analysis, and the concentration of activated carbon adjacent the second exterior surface is less than about 40 percent, as determined by optical image analysis, so that the filter is adapted to selectively reduce the C3-C4 carbonyl component of conventional tobacco smoke at least about 25 percent more than a conventional cellulose acetate filter for an identical tobacco smoke. Also disclosed is a method of making the filter.
(FR)
L'invention concerne un filtre pour la fumée du tabac, composé d'au moins une couche d'une structure composite non-tissée fibreuse, absorbante, formée par voie humide et contenant: 1) d'environ 30 à environ 65 % en poids de fibres de pâte formant une matrice présentant une première surface extérieure et une deuxième surface extérieure; et 2) environ 35 à environ 70 % en poids de charbon actif intégré dans la matrice de fibres de pâte, de telle manière que la concentration de charbon actif adjacente à la première surface extérieure est d'au moins environ 60 %, selon détermination par analyse d'images optiques, et la concentration de charbon actif adjacente à la deuxième surface extérieure est inférieure à environ 40 %, selon détermination par analyse d'images optiques, de sorte que le filtre est adapté pour réduire sélectivement le constituant carbonyle C3-C4 de la fumée de tabac classique d'au moins environ 25 % de plus qu'un filtre traditionnel en acétate de cellulose pour une fumée de tabac identique. L'invention concerne également un procédé pour fabriquer ce filtre.
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