Smoking article and smoking article filter

a filter and smoking article technology, applied in the field of improved filters, can solve the problems of ineffective removal or reduction of gas phase constituents of mainstream smoke, limited commercial acceptance of carbon filters, and unpleasant taste of carbon-filtered cigarettes

Inactive Publication Date: 2009-03-05
ZAWADZKI MICHAEL A +4
View PDF0 Cites 45 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0017]The filters of the present invention are capable of reducing one or more of the allegedly undesirable volatile components of mainstrea

Problems solved by technology

Most commercially available cigarettes have filters which are designed to reduce particulate matter but are ineffective to remove or reduce gas phase constituents of mainstream smoke.
The commercial acceptance of carbon filters, however, has been limited by the “off-taste” of the mainstream smoke characteristic of such filters.
The smoke from carbon-filtered cigarettes

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Smoking article and smoking article filter
  • Smoking article and smoking article filter
  • Smoking article and smoking article filter

Examples

Experimental program
Comparison scheme
Effect test

examples 1-10

[0066]In Examples 1-7 and 10, the lengths of the filter cavities provided are estimated based on the approximate density of the treated activated carbon samples. In a fully loaded condition there will be approximately 25 mg of treated activated carbon per millimeter of cavity length.

[0067]Cigarettes designated as ventilated in the following Examples contained a circumferential row of perforations somewhere along the length of the filter cavity between its upstream and downstream ends.

example 1

[0068]Activated coconut carbon was treated with various materials as listed in Table 1. For all samples listed in this example, PCB (20×50 mesh) activated coconut carbon supplied by Calgon Carbon Corporation (Pittsburgh, Pa.) was used.

TABLE 1ApplicationApplicationMaterial #TreatmentSource **(% wt / total wt)(mmole / gram carbon)1-1Glucosamine hydrochlorideCat #G220-6; Aldrich20.01.161-2Glucose monohydrateCat #49158; Fluka18.71.161-3Lactose monohydrateCat #61339; Fluka29.51.161-4Maltose monohydrateCat #63419; Fluka29.51.161-5SorbitolCat #S375-5; Aldrich4.11.161-6MannitolCat #M-9647; Sigma17.21.141-7FructoseCat #15760; Riedel-de Haën17.21.151-8InositolCat #I6652; Aldrich17.21.161-9Tapioca DextrinCrystal Tex 627; National Starch20.0—1-10ErythritolCat #E-7500; Sigma12.61.181-11Calorie Free Sweetener *Great Value Brand; WallMart18.7—1-12SucroseCat #84097; Fluka28.21.151-13Chitosan oligosaccharide lactateCat #52,368-2; Aldrich16.9—1-14MaltodextrinLodex-10; Mother Murphy's19.9—1-15Hydroxypropy...

example 2

[0072]The following test was conducted to determine the efficacy of various amino acids as off-taste suppressants for use in the present invention. Activated coconut carbon was treated with various materials as listed in Table 3. For all samples listed in this example, PCB (20×50 mesh) activated coconut carbon supplied by Calgon Carbon Corporation (Pittsburgh, Pa.) was used.

TABLE 3ApplicationApplicationMaterial #TreatmentSource *(% wt / total wt)(mmole / gram carbon)2-1AsparagineCat #A9,300-3; Aldrich8.490.702-2GlutamineCat #G-3126; Sigma9.450.712-3GlycineCat #G620-1; Aldrich4.840.68* Aldrich = Aldrich Chemical Company (Millwaukee, WI); Sigma Chemical Company (Millwaukee, WI).

[0073]The activated carbon was treated according to the following general procedure. Each treatment material listed in Table 3 was dissolved in water. Then the resulting solution was applied to the untreated carbon. Sufficient treatment material was added to the water to yield the final application as listed in Tab...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

Improved filters useful for tobacco products, such as cigarettes, and novel cigarettes having such filters are disclosed. The filters include adsorbents such as activated carbon which reduce amounts of one or more gas phase constituents of mainstream tobacco smoke. The adsorbents are treated with off-taste suppressants which reduce the off-taste associated with adsorbent containing filters and substantially restore the taste normally associated with tobacco smoke.

Description

[0001]This is a divisional application of U.S. Ser. No. 10 / 442,357 filed May 20, 2003 to which priority under 35 U.S.C. § 120 is claimed.FIELD OF THE INVENTION[0002]The present invention relates generally to improved filters useful for tobacco products, particularly cigarettes, and to novel cigarettes having such filters. More specifically, the invention relates to filters containing adsorbents which reduce one or more allegedly undesirable gas phase constituents normally found in mainstream tobacco cigarette smoke.BACKGROUND OF THE INVENTION[0003]Typically, cigarettes are comprised of a paper-wrapped cylindrical rod of cut tobacco filler, alone or combined with other tobacco or non-tobacco substances, and a filter attached at the mouth or buccal end of the rod. On combustion, the smoke passing through the filter, commonly referred to as “mainstream” smoke, contains particulate matter, e.g. tar, and gas or volatile phase constituents. The gas phase of mainstream cigarette smoke cont...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): A24D3/04A24D3/06A24D3/12A24D3/14A24D3/16
CPCA24D3/12A24D3/163A24D3/14
Inventor ZAWADZKI, MICHAEL A.RUDD, A. BRENTBARRETT, KENNETH D.JESSUP, TERRY D.DEATON, WILLIAM R.
Owner ZAWADZKI MICHAEL A
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap