Classifications

• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
  • A24D3/00—Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of cigars or cigarettes
  • A24D3/06—Use of materials for tobacco smoke filters
  • A24D3/16—Use of materials for tobacco smoke filters of inorganic materials
  • A24D3/163—Carbon
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
  • A24D3/00—Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of cigars or cigarettes
  • A24D3/02—Manufacture of tobacco smoke filters
  • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
  • A24D3/0212—Applying additives to filter materials
  • A24D3/022—Applying additives to filter materials with liquid additives, e.g. application of plasticisers
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
  • A24D3/00—Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of cigars or cigarettes
  • A24D3/06—Use of materials for tobacco smoke filters
  • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent

Definitions

• This invention relates to methods for making tobacco smoke filterin-g material and elements thereof suitable for use in cigarettes, pipes, cigarette holders and cigar holders. More particularly,the invention is concerned with improvements in making filters of the kind disclosed in my appliaction Serial No. 432,931, now -U.S. Patent No. 2,881,770, of which-the instant invention is a continuation-in-part.
• the carbon is continuously applied to an opened and banded'moving tow. That is to say, tow from a supply roll is opened-to debundlize the filaments and provide a larger and more uniform tow cross section, and theopened tow is spread uniformly to a much larger widthof e.g., 8 times its original width, thereby exposing substantially all of the filaments to material, i.e.
• plasticizer issuing from a dispenser adjacent which the towpasses.
• the carbon may be added before, simultaneously with, or after the plasticizer, preferably with or after.
• the finely divided carbon is preferably sufiicientlyiadhered to the filaments so that it willnot dust ofiLJcome loose in the smokers mouth or otherwise present such type difii: culty. Accordingly, it is believed apparent that providing improved methods for making carbon containing filters of the. type just referred to represents a highly "desirable result. Atter extended investigation I have found certain improved methods for manufacturing such filters.
• This invention therefore, has as one object an improved method for theproduction of cigarette smoke filters con? sisting of'a bundle of substantially longitudinally oriented textile filaments infused with finely divided carbonparticles. Another object is to provide methods of theclass indicated tor increasing the bonding of the particles onto the filament filter. A still further object is to, make an additive filter :which 'is capableof removing nicotine, tars and other deleterious components of cigarette smoke without oausingthesm'oke to be dry or distasteful] Another object is toprovide improved methods which'are efiicient and efiectiv'e, yet relatively economical and simple in operation.
• my filter product comprises a-longitudinally oriented mass of substantially lengthwise aligned filaments, the spacing of substantially all groups of adjacent filaments providing minute passages forjjs'moke therethrough, said mass carrying finely divided carbon particlea'said particles occupying positionsinand partially blocking said passages whereby a substantial por;
• T e oi oi arette filter 1:1 15 mm.) Mg. of Mg. of Mg. of Mg. 01' YD g p tars 1 nicotine 1 tars nicotine Elasticized cellulose acetate tow -Q. 130 20 5 Acetate tow filter 125 18 Plasticized cellulose acetate tow co sin g 4% Acetate tow filter containing 9% lampblack powbone charcoal powder....'.... 108 17 der 7 V 113 15 l Obtained from collected; smrillref (g him fizlfitered cllga costumeys. N orE.-Moisture of the tobacco in each of the cigarettes equals 12.0%.
• Example II J A loose, i.e., partially opened crimpcd continuous filament tow ofccllulose acctateyarn containing approxi mately 10,000 fibersof. 8 denier per filament; waspulled through abath containing a highly agltaced-slurryof commercially available activaredwoodcharcoal in water.
• ganic plasnicizer capable of partially: dissolving the cellulose acetate filamen-issuch as described in Example -I.
• Iilustrationsof other-suitable plasticizers are: glycerol impregnated tow was processed into filter rods in a garnie 'diand t'riacetate, glycerol di and tripropionate, propylene glycol monoand diacetate,- di(methoxyethyl)phthalate, triethyl citrate, acetyl-tricthyl cior'ate and mcthylph'nhalylethyl ,glycollare... 1 5 v
• Example IV f A how of cellulose acetate-1 yarn containing. approximately 6,000 fibers of five denier per filament was pulled over a compressed air device.
• Example VI I A tow of cellulose acetate yarn: containing approximately 12,000 fibers of five denier per filament was sprayed with a mixture consisting. of 1 part polyvinyl ace tat e,.cn1ulsion1.(55% solids-45% water), 1 part ac; tivated charcoal and 2. parts water. The tow was proc; essed into filter tips, attached to cigarettesandanalyzed as'in Example 'IV.. Thedried tips'co'ntained 13.4% of i polyvinyl acetate end-24.4% activated charcoal. They removed 20% of the aldehydes-from the gaseous phase of cigarette'smoke. l
• Example VII A tow of cellulose acetate yarn containing approximately 12,000 fibers of five denier per filament was sprayed with a mixture consisting of 1 part polyvinyl acetate emulsion (55% solids-45% Water) and 2 parts water. The tow was processed into filter tips, attached to cigarettes and analyzed as in Example IV. The tips contained 22.4% polyvinyl acetate. They removed less than 4% of the aldehydes from. cigarette smoke.
• Example VIII Example IX A cellulose acetate tow of 5 denier per filament, 55,500 total denier was sprayed with a mixture of stearyl alcohol and finely powdered activated carbon to give an add-on, based on tow weight, of 22.5% stearyl alcohol and 4.5% carbon. Removals as determined in Examplev VIII averaged 53% for a mm. tip having a pressure drop of 2.7 inches of water.
• Example X A mixture of stearyl alcohol and activated carbon was sprayed on a 2.1 denier per filament, 44,400 total denier acetate tow to give an add-on of 12.5% stearyl alcohol and 2.5% carbon. Removals as determined by Example VIII averaged 48% for a. standard 15 tip having a pressure drop of 2.6 inches of water.
• Example XI An acetate tow of 2.1 denier per filament, 44,000 total denier was sprayed with a mixture of stearic acid and activated charcoal to give an add-on of 12.5% stearic acid and 2.5% carbon. When tested in the usual manner, a standard 15 mm. tip gave an average removal of 52% at a 2.7-inch pressure drop.
• the type of carbon employed is not a critical factor. Rather, the form of the carbon is more important.
• the carbon should be in a powdered form so that it can be readily slurried in a liquid or passed through a spraying nozzle.
• a low viscosity type of organic solvent soluble cellulose ester could be used as a thickener and tackefier for the plasticizer. All of these compounds are readily soluble in the plasticizers already mentioned for cellulose acetate tow filters. 3 They are particularly effective with glycerol diand triacetate. As apparent from the above examples, unusually good results have been obtained with filters prepared from a crimped continuous .filament tow of cellulose acetate fibers sprayed with certain plasticizers in accordance with the preferred embodiments of this invention.
• the usefulness of the methods extends to other synthetic fibrous filters, including 011086 prepared from fibers of viscose, polyamides and polyesters, where the fibers are are coextensive with the body of the filter.
• the method for the continuous manufacture of tobacco smoke filters which comprises continuously withdrawing crimped continuous tow of synthetic spun filaments from a package of such tow, banding the tow to a width of at least six inches, applying to the banded to'w both bonding agent and powdered additive, reforming the tow thus treated into the desired filter shape and wrapping the filter with a wrapper.
• the tow consists essentially of cellulose acetate filaments of a denier per filament of less than 8 and of a total denier of less than 120,000.
• the bonding agent is a latex material essentially comprised .of a polyvinyl-polymeric compound. Y m V f 5.
• the method for manufacturing tobacco smoke filters which comprises withdrawing crimped continuous celluloseacetate filaments of a denierperfilament of less than Sand a'totaldenier ofless than "100,000 from a package of such filaments, banding such filaments to a width of at least six inches, applying to the banded filaments both a bonding media and activated carbon particles, the bonding mediab'eing such that it will not materially deactivate 8 i the activated carbon additive, reforming the filaments thus treated into the desired filter shape and applying a wrapper around the circumference of the-filter.
• a method of making tobacco smoke filters from crimpedcontinuous cellulose acetate filaments wherein the filaments are handed into an opened up condition the step which comprises spraying the opened up fil aments with an emulsion essentially comprised of a polyvinyl compound from the group consisting of polyvinyl acetate and polyvinylisobutyrate whichpolyvinyl compound has mixed therewith powdered charcoal and water;

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Inorganic Chemistry (AREA)
• Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Priority Applications (2)

Applications Claiming Priority (1)

Publications (1)

Family

ID=25167730

Family Applications (1)

Country Status (2)

Cited By (16)

Citations (7)

• 1959
  • 1959-03-02 US US796259A patent/US3043736A/en not_active Expired - Lifetime
• 1965
  • 1965-09-23 BE BE670052A patent/BE670052A/fr unknown

Patent Citations (7)

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