CN101873810A - Filter including randomly-oriented fibers for reduction of particle breakthrough - Google Patents

Filter including randomly-oriented fibers for reduction of particle breakthrough Download PDF

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Publication number
CN101873810A
CN101873810A CN200880117548A CN200880117548A CN101873810A CN 101873810 A CN101873810 A CN 101873810A CN 200880117548 A CN200880117548 A CN 200880117548A CN 200880117548 A CN200880117548 A CN 200880117548A CN 101873810 A CN101873810 A CN 101873810A
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China
Prior art keywords
plug
filter assembly
filter
fiber
adsorbent
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Pending
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CN200880117548A
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Chinese (zh)
Inventor
杨泗松
J·C·常
S·哈
M·B·迈尔
L·L·薛
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Philip Morris Products SA
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Philip Morris Products SA
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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/062—Use of materials for tobacco smoke filters characterised by structural features
    • A24D3/063—Use of materials for tobacco smoke filters characterised by structural features of the fibers
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for 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
    • A24D3/0225—Applying additives to filter materials with solid additives, e.g. incorporation of a granular product
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0275—Manufacture of tobacco smoke filters for filters with special features
    • A24D3/0287—Manufacture of tobacco smoke filters for filters with special features for composite filters
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure
    • A24D3/048—Tobacco smoke filters characterised by their shape or structure containing additives
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for 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
    • A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for 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

Abstract

Provided is a cigarette filter (10) and method of making the filter. The filter (10) includes an adsorbent (12) dispersed within the filter (10) and a downstream plug (16) of randomly-oriented fibers (14). The randomly-oriented fibers (14) mechanically capture adsorbent particles entrained in tobacco smoke. One or more plugs (25) of axially-oriented fibers (30) may also be located upstream or downstream or both of the adsorbent (12), and are included in an amount sufficient to adjust the length of the filter (10).

Description

The filter tip that comprises the randomly oriented fiber that is used to reduce particle breakthrough
Background technology
Cigarette generally includes filter element, and this filter element can have sorbent material incorporated therein (for example carbon).Being suitable for being combined in filter element in the cigarette with filter tip can comprise and for example be combined in the cellulose acetate tow or particulate or particle, other sorbent material or its combination of the carbon (such as activated carbon or activated charcoal) in the cavity between cellulose acetate material.
Summary of the invention
The invention provides the filter assembly that is used for smoking product that a kind of sorbent particles with minimizing penetrates.This filter assembly comprises: adsorbent, and it comprises the sorbent particles that is included in the sucked flue gas in the filter tip; And the plug that comprises randomly oriented fiber.This comprises that the plug of randomly oriented fiber provides the sorbent particles that reduces to penetrate.
In a preferred embodiment, filter assembly is plug-space-plug filter tip.Most preferably, this randomly oriented fiber plug is positioned at the downstream of adsorbent.Preferably, this randomly oriented fiber plug is located immediately at the downstream of adsorbent.
In one embodiment, axial orientation fiber plug is positioned at the upstream of adsorbent.In another embodiment, axial orientation fiber plug is positioned at the downstream of adsorbent.
In a preferred embodiment, filter assembly comprises having the randomly oriented fiber plug of about 3mm to about 10mm length.One or more axial orientation fiber plugs can be added to regulate filter-tip length.Yet in one embodiment, non axial directional fiber is included in the filter tip.
In a preferred embodiment, filter assembly mechanically reduces sorbent particles and penetrates.
The present invention also provides a kind of smoking product that comprises filter assembly, and this filter assembly has reduced or eliminated the sorbent particles in the main flume and penetrated.
In a preferred embodiment, smoking product comprises tobacco rod and filter assembly.Preferably, filter assembly is plug-space-plug filter tip, and wherein, this space is filled with adsorbent.In a preferred embodiment, the randomly oriented fiber plug is positioned at the downstream in this space that is filled with adsorbent (cavity).In a preferred embodiment, tobacco rod comprises tobacco-containing material and packing.Preferably, filter assembly is attached on the end of tobacco rod by tipping paper (tipping paper).
The method that the present invention also provides a kind of manufacturing to be used for the filter assembly of smoking product, this filter assembly have reduced or eliminated the sorbent particles in the smoke of tobacco and have penetrated.
In a preferred embodiment, this method comprises the cavity of filling plug-space-plug filter assembly with adsorbent, and wherein, this cavity is by randomly oriented fiber plug and acetate fiber plug deckle circle.In another embodiment, the acetate fiber plug is an axial orientation fiber plug.
The invention provides the filter-tip method of a kind of manufacturing, comprising: the axial orientation fiber plug of placing duplex (2-up) with spaced apart relation; The plug that will comprise randomly oriented fiber is positioned between the plug of duplex, thereby makes at upstream extremity and downstream end formation cavity every a duplex plug; The adsorbent that will comprise the sorbent particles that can suck flue gas is positioned in the cavity; And in the axial orientation fiber plug of the described duplex of heartcut every one to form the filter assembly of duplex.This method can also comprise tobacco rod is attached on every end of filter assembly of described duplex, and at the filter assembly of the described duplex of heartcut to form complete cigarette.
Description of drawings
Fig. 1 shows the plug-space-plug filter tip of the prior art that is used for smoking product;
Fig. 2 shows the filter-tip embodiment of plug-space-plug that comprises the randomly oriented fiber plug;
Fig. 3 shows filter-tip second embodiment of the plug-space-plug that comprises the randomly oriented fiber plug;
Fig. 4 shows filter-tip the 3rd embodiment of the plug-space-plug that comprises the randomly oriented fiber plug; And
Fig. 5 shows the smoking product that comprises that the filter-tip part of the plug-space-plug that contains the randomly oriented fiber plug is launched.
The specific embodiment
The invention discloses a kind of filter tip that is adapted to be incorporated in the smoking product (such as cigarette with filter tip).This filter tip comprises the filter-tip material with randomly oriented fiber.Under the situation that sorbent particles or sorbent particles fragment may be inhaled in the main flume and mouth end by (promptly penetrating) cigarette flows out, randomly oriented fiber is mechanically caught the sorbent particles that is drawn in the main flume.
In this article, term " can suck the particulate of flue gas " and refer to be inhaled in the main flume, be of a size of about 0.1 micron to about 10 microns bead, particle, dust, thin dirt, powder and analog.
In this article, term " randomly oriented fiber ", " randomly oriented fiber plug " and " random orientation " refer to be included on all directions textile fabric and the non-woven fibre of the continuous filament of directed entanglement, and described direction is mobile parallel with this main flume when main flume passes through smoking product not substantially.On the contrary, basic mobile parallel with main flume of the axial orientation fiber in the filter tip plug, and be formed in the intrafascicular continuously of extension in axial direction with the tangled shape of minimum." randomly oriented fiber ", " randomly oriented fiber plug " and " random orientation " also refer to the non-woven material that can make with dry method or wet processing (comprise in a little sticking, spunbond, Nomex, acupuncture cotton, the water and suspending etc.).The details that is used to make the manufacturing technology of the filter stick with randomly oriented fiber can be in U.S. Patent No. 3,111, and 702, No.4,540,625 and No.5, find in 817, No. 159, the disclosure of these documents is by with reference to being combined in herein.
Preferably, filter tip is suitable for being combined in the cigarette with filter tip.Cigarette filter can manufacture and design with various.Typically, cigarette filter comprises four critical pieces: filter tow is (such as the cellulose acetate fibre bundle or comprise most of filter-tip paper; Plasticizer (promptly adding the softening agent that is used for filter fiber is bonded in together continuous filter stick); Plug packing (promptly being used to hold the wrapper of filter-tip material); And binding agent, it is used to the plug packing is fixed in the continuous filter stick.
Can make the filter stick that is used to make cigarette filter by utilizing bar formation apparatus that filter-tip material bag or bundle are formed rod, this filter stick can be attached in tobacco rod (for example use tipping paper attached) and go up to form cigarette with filter tip.Typically, filter stick comprises and can reach 30,000 filter-tip material silks.The preferred filter-tip material that is used to form filter stick is a cellulose acetate, and it is a cellulose esters.
Plasticizer or adhesive (such as glyceryl triacetate) were added to before described bundle enters into bar formation apparatus that this is intrafascicular.In addition, usually can by this bundle is placed stretching and make its on the air-spray by making this beam spreading open and shake up or " blooming ".The bundle of blooming can pass through funnel or other limiting device, then by shaped hole to form filter stick.
Can be at duration of flowering or add intrafascicular plasticizer afterwards to and can be when bundle is assembled strengthen bonding between the filament at the cross-point place of filament.Therefore, the interpolation of plasticizer can improve the steadiness of the filter stick that is formed by bundle.Plasticizer can also have filtering feature.The attribute of the filter stick of making (for example filter efficiency, steadiness, dimensional stability etc.) can improve by solidifying (for example heating) plasticizer.
Can adopt various filter structures to form filter element.Exemplary filter structure includes but not limited to single-filtering mouth, two filter tip, three filter tips, cavity filter tip, recessed filter tip, without hindrance flow filtration mouth or their combination.The single-filtering mouth comprises acetate tow or cellulose paper material usually.Mono cellulose filter tip or papery filter tip can be the effective filters that is used for tar and/or nicotine.Two filter tips generally include cellulose acetate mouth end and pure cellulose or cellulose acetate segment.Described section length in two filter tips and pressure drop can be regulated so that the filtration that needs (promptly adsorb and/or absorb) and resistance to suction (RTD) to be provided.
Filter element can be attached on the tobacco rod to form cigarette with filter tip.In the production of cigarette, go muscle tobacco leaf component to combine, and be provided for cigarette machine with the production tobacco column with other cigarette additive, then tobacco column is wrapped in the cigarette paper forming tobacco rod, this tobacco rod section of being cut into, and be hinged with filter tip alternatively.Resulting cigarette can utilize standard or modified tobacco curing technology and equipment to be made into the specification that needs.The length range of cigarette can be at about 50mm between about 120mm.Girth usually at about 15mm between about 30mm, preferably about 25mm.Smokable filler density is usually at about 100mg/cm 3To about 300mg/cm 3Scope between, preferably at about 150mg/cm 3To about 275mg/cm 3Between.
Tobacco go the muscle tobacco leaf to be generally to be cut into width about 1/10 inch to about 1/20 inch scope or even the fragment or the thigh bundle form of about 1/40 foot (about 2.5mm is to scope or even the about 0.6mm of about 1.3mm).The length range of strand bundle is at (at about 6.4mm extremely between about 76mm) between about 0.25 inch to about 3 inches.Cigarette can also comprise one or more spices or other additive (for example combustion-supporting additive, combustion modifications additive, colouring agent, adhesive etc.).
Can adopt any suitable tobacco composition to be used to the muscle tobacco leaf.The example of the tobacco-containing material of suitable species comprises flue-cured tobacco, Burley tobacco, Bright tobacco, Maryland tobacco or Oriental tobacco, rare or distinctive tobacco and their mixture.Tobacco-containing material can provide with tobacco thin layer, treated tobacco-containing material (such as volumetric expansion or fluffy tobacco), treated tobacco stem (such as stem (cut-rolled stem) or cut loose stem (cut-puffedstem)), the tobacco-containing material of reformulating or the form of its mixture.Tobacco can also comprise substitute of tobacco.
Term " main flow " flue gas refers to: pass and mixture by the filter end effluent air along tobacco rod, promptly flow out or the exhaust gas volumn of sucking-off from the mouth end of cigarette during being fuming of cigarette.Main flume comprises the flue gas by lighting the district and sucking by the cigarette paper packing.Term " tributary " flue gas refers to the flue gas that produces during the static combustion.
Plug-the space of prior art shown in Figure 1-plug carbon filter tip 105 comprises the bed 115 of the adsorbent 112 (such as activated carbon) between axial orientation fiber plug 130.Typically, the axial orientation fiber is a cellulose acetate fibre.Bound by theory not, when flue gas was inhaled filter tip by following current, thereby some can suck the particulate, dust of flue gas, thin dirt or its combination and can infiltrate through passage between each fiber, cause sorbent particles to penetrate filter tip or have above-mentioned two kinds of situations simultaneously along the fiber migration.In a preferred embodiment, plug-space-plug filter tip 105 is attached on the tobacco rod 160, and these tobacco rod 160 packaged paper 170 parcels are to form smoking product 100.Tipping paper 165 surrounds the part of filter tip 105 and tobacco rod 160.
As described herein like that, the filter assembly that is used for smoking product may reduce and/or eliminate sorbent particles and penetrates by the mechanical entrapment that improves the particulate that can suck flue gas.
In a preferred embodiment, filter assembly 10 is the filter assembly of plug-space-plug orientation.As shown in Figure 2, preferably, filter assembly 10 is plug-space-plug filter tip.Preferably, comprise that the part of the adsorbent 12 of the particulate that can suck flue gas is arranged in the internal cavities 15 of filter tip 10, the plug 16 of randomly oriented fiber 14 is positioned at the sorbent particles of downstream when reducing main flume by filter assembly 10 and penetrates.In theory, because fiber 14 axially do not line up, so sorbent particles advances without the passage between the fiber or along fiber, reduced or eliminated the sorbent particles in the main flume thus and penetrated.
In a preferred embodiment, the adsorbent and/or the particulate that can suck flue gas comprise any suitable adsorbent medium.Exemplary adsorbent comprises molecular sieve, such as zeolite, silica, silicate, alumina, carbon (for example activated carbon) or its combination.Preferred adsorbent medium is an activated carbon.Preferably, filter assembly comprises the adsorbent of about 30mg to about 200mg.
" activated carbon " refers to the carbon of any porous, high surface area forms.Activated carbon can be by heat-treating acquisition to any suitable carbon source.This activation processing has improved porosity usually, and activated carbon can have the pore-size of wide region, and the size that perhaps can control hole is to provide the pore size distribution that needs.
In a preferred embodiment, carbon is the form of particle or analog.Preferably, the carbon of preferred embodiment is the activated carbon of high surface, typical ASTM granularity that for example adopts in the cigarette industry or thinner coconut husk base carbon.Particularly preferred activated carbon can be from PICA USA, Inc., and Truth orConsequences, New Mexico is commercial to be obtained.Activated carbon can also be made by the carbonization of coal, timber, pitch, mud coal, cellulose fibre, brown coal and dento liva.The carbonization high temperature in inert environments (for example 400 ℃-1000 ℃) is usually implemented down, activation under reduction or oxidizing condition then (i.e. calcining).
In a preferred embodiment, activated carbon can be the form of bead.In other embodiments, activated carbon can be the form of particle, fiber or its combination.Preferably, activated carbon is suitable for adsorbing the composition of main flume, particularly comprise the gas phase composition of acetaldehyde, ketone and other volatility organic double compound, be specially 1,3-butadiene, methacrylaldehyde, isoprene, propionic aldehyde, acrylonitrile, benzene, toluene, styrene, acetaldehyde and hydrogen cyanide.
In other embodiments, carbon can be the form of carbon filament bundle (carbon on tow), carbon paper (carbonpaper) or its combination.
Most preferably, activated carbon can comprise that size range is at about 100 microns graininess particulates between about 5mm.In one embodiment, the particulate of activated carbon has the average-size of about 0.2mm to about 2mm (for example about 200,500,1000 or 2000 microns).
Described in U.S. Patent Application Publication text No.2003/0154993 (its full content by with reference to be combined in herein), the size range that is included in the activated carbon bead in the filter assembly preferably at 0.20mm between about 0.70mm.
Preferably, activated carbon can have the pore size distribution of any needs, and this pore size distribution comprises such as the such hole of micropore, mesopore and macropore.Term " micropore " is often referred to this material with about 20 dusts or littler pore-size, and term " mesopore " is often referred to this material of the pore-size with about 20-500 dust.
In one embodiment, activated carbon can be selected to and has suitable surface area so that preferentially absorption or absorb or not only adsorbed but also absorb target component from flue gas.For example, preferred activated carbon has usually greater than about 50m 2/ g is (for example at least about 100,200,500,1000 or 2000m 2/ g) surface area.Usually, the absorbability of activated carbon increases and increases along with surface area.In addition, surface area reduces along with particle size usually and increases.Yet, when being used as the cigarette filter medium, can crossing thickly to be filled in and in smoking process, can not allow flue gas to flow through filter tip together with suitable resistance to suction (RTD) to such an extent as to have the carbon granules of small particle size.On the other hand, if particle size is excessive, then may not obtain the filtering degree that enough surface areas obtain needs.Therefore, when selecting to be suitable for filtering one of main flow and tributary flue gas or both carbon granules, to consider these factors.
Preferably, at least some of adsorbent (if non-whole) have spices or be impregnated with spices similarly, thereby this adsorbent not only is suitable for removing one or more gas phase smoke components from flue gas, also be suitable for spices is discharged in the mainstream smoke air-flow.For example, can by in mixing (rollings) tin or replacedly in the fluid bed that with nitrogen is fluidizing reagent (so wherein spices can be sprayed on the carbon on this) spices is sprayed on a collection of activated carbon spices is added on the activated carbon.
Preferably, randomly oriented fiber is a cellulose acetate fibre.In another embodiment, randomly oriented fiber is polyester fiber, polypropylene fibre or analog.In one embodiment, randomly oriented fiber can be such weaving cotton cloth and/or nonwoven, this weave cotton cloth and/or nonwoven in fiber be bonded together at random.
In a preferred embodiment, fiber has Y shape cross section.In another embodiment, fiber can have semi-open shape or the cross section that has open space, such as in U.S. Patent No. 6,919,105, No.6,913,784 and/or No.6, disclosed fiber in 907,885, the disclosure of these patents is combined in herein by reference.
As shown in Figure 2, preferably, the buccal 20 of filter assembly 10 is preferably the form of the plug 16 of randomly oriented fiber 14.Preferably, plug 16 is arranged in the downstream of the adsorbent 12 that remains on cavity 15, be of a size of about 0.1 micron extremely about 10 microns sorbent particles as in the existing filter assembly that adopts the axial orientation fiber, moving with prevention, perhaps stop this two kinds of situations simultaneously by the passage between the fiber or along fiber.In a preferred embodiment, the plug 25 of axial orientation fiber 30 is positioned at the upstream of adsorbent 12.
In use, flue gas at first is drawn through the plug 25 of axial orientation fiber 30, and passes through adsorbent 12, and passes through the plug 16 of randomly oriented fiber 14 along the downstream.Because the random orientation of downstream fiber plug 16, sorbent particles can not be advanced or along the fiber migration or occur this two kinds of situations simultaneously by the passage between the fiber, thereby causes being drawn into the mechanical entrapment of the sorbent particles in the main flume.
In another embodiment, as shown in Figure 3, filter assembly 10 comprises the part of adsorbent 12 in cavity 15.The plug 16 of randomly oriented fiber 14 is positioned on every side of this part adsorbent 12.
In another embodiment, as shown in Figure 4, filter assembly 10 comprises the cavity 15 that is filled with adsorbent 12.Preferably, the plug 16 of randomly oriented fiber 14 is positioned at the cavity 15 direct downstreams that are filled with adsorbent 12.Preferably, the plug 25 of axial orientation fiber 30 is positioned at the direct upstream of cavity 15.Also preferably, the plug 25 of axial orientation fiber 30 is positioned at the direct downstream of the plug 16 that contains randomly oriented fiber 14.
As shown in Figure 5, filter assembly 10 is suitable for being combined in the smoking product 50.
Term " smoking product " comprises cigarette, cigar, tobacco pipe and tobacco leaf cigarette.Cigarette on the non-traditional meaning (is fuming the cigarette of system (as in commonly assigned U.S. Patent No. 6,026,820 such as being used for electronics; No.5,988,176; No.5,915,387; And No.5, described in 499,636)) generally be also included within the definition of smoking product or cigarette.
Preferably, smoking product is a cigarette.Cigarette can comprise tobacco-containing material and filter tip.In one embodiment, cigarette can also comprise at least a adsorbent.Traditional cigarette comprises two parts usually: contain tobacco section, it is known as tobacco rod sometimes; And the filter tip part, it can be known as filtering area.Tipping paper surrounds filter tip usually, and this forms the buccal of cigarette.Tipping paper and tobacco rod overlap so that filter tip and tobacco rod are kept together.The tobacco rod of cigarette or contain the tobacco element and comprise the binding agent that tobacco is wrapped in the wrapper in it and the seam of wrapper is kept together.Tobacco rod have with attached first end of filter tip one and lighted or heating so that second end that tobacco is fuming.Lighted or heat when being fuming when tobacco rod, flue gas marches to the filter end of tobacco rod from lighting end along downstream direction, and further passes through filter tip along downstream direction.
Below example be presented so that filter-tip embodiment to be described, and should not be interpreted into the scope of this embodiment of restriction.
Example 1
The cellulose acetate plug of the 6mm that constitutes by the random orientation cellulose acetate fibre be placed in be filled with the 110mg activated carbon the cavity downstream to form filter tip.
Utilization is according to the filter tip of example 1 structure and contrast plug-space-plug filter tip of being made by the cellulose acetate fibre plug of two axial orientation, utilize laser light scattering corpuscular counter (237B type Met-One laser particle counter: Hach Ultra Analytics, Richmond CA) measures the possibility that activated carbon particles penetrates under unlit dried aerosol spraying (dry puff) condition.
Penetrating about carbon granules when filter tip tested, the laser light scattering corpuscular counter is placed with next-door neighbour's cigarette retainer, and this cigarette retainer aligns with air-flow by cigarette.It is dark that filter tip is inserted in the cigarette retainer about 9 ± 1mm, and implement the machine aerosol spraying under unignited (dried aerosol spraying) condition of using 55ml/ aerosol spraying, 2 seconds aerosol spraying duration, 12 aerosol spraying/cigarette type exterior features.
Table one
Figure GPA00001140654600091
Table 1 shows test result, and will compare with traditional plug-space-plug filter tip according to the filter tip of example 1 (test #1 and #2) structure, wherein this traditional plug-space-plug filter tip has the cavity that is filled with activated carbon and is positioned at the plug (contrast) of cellulose acetate fibre of the axial orientation of activated carbon upstream and downstream.
Include the random orientation cellulose acetate fibre, show according to the filter tip of the test #1 of example 1 structure that the average carbon granules of every cigarette penetrates and be about 251 particulates.The scope of this particle breakthrough is extremely about 351 particulates of every about 22 particulates of cigarette, and this cigarette filter for contrast is one significantly to be reduced.
Show according to the filter tip of the test #2 of example 2 structure that the average carbon granules of every cigarette penetrates and be about 198 particulates.The scope of particle breakthrough is extremely about 187 particulates of every about 40 particulates of cigarette, and this cigarette filter for contrast is one significantly to be reduced.
On the contrary, the contrast filter tip that does not comprise the cellulose acetate fibre of random orientation shows that the average carbon granules of every cigarette penetrates and is about 1097 particulates.Therefore obviously: the carbon granules that uses the cellulose acetate fibre of random orientation obviously to reduce during the smoking in filter tip penetrates.
Will appreciate that: foregoing description is a preferred embodiment, therefore the just representative of the method for smoking product and this smoking product of manufacturing.Can recognize: according to above-mentioned instruction, the changes and improvements of different embodiment are conspicuous to those skilled in the art.Therefore, these exemplary embodiments and alternative embodiment can be finished in the spirit and scope that do not break away from the goods that limit as appended claims and method.

Claims (14)

1. filter assembly that is used for smoking product, it comprises:
The adsorbent that comprises the sorbent particles that can suck flue gas; With
The plug that comprises randomly oriented fiber,
Wherein, the described plug of randomly oriented fiber that comprises provides the sorbent particles that reduces to penetrate.
2. filter assembly as claimed in claim 1, wherein:
Described randomly oriented fiber plug is positioned at the downstream of described adsorbent.
3. filter assembly as claimed in claim 1, wherein:
The described plug of randomly oriented fiber that comprises is positioned at the direct downstream of described adsorbent.
4. filter assembly as claimed in claim 1, wherein:
The described plug of randomly oriented fiber that comprises has the length of about 3mm to about 10mm.
5. filter assembly as claimed in claim 1, wherein:
Described randomly oriented fiber plug comprises one or more in cellulose acetate fibre, polyester fiber and the polypropylene fibre of random orientation.
6. filter assembly as claimed in claim 1, wherein:
This filter assembly comprises the described adsorbent of about 30mg to about 200mg.
7. filter assembly as claimed in claim 1, wherein:
Described adsorbent is included in one or more in carbon filament bundle, carbon paper, carbon bead, carbon granule, carbon particulate and the analog in the cavity.
8. filter assembly as claimed in claim 1, wherein:
Described filter assembly is plug-space-plug filter tip, described adsorbent comprises the bead carbon that places described space, and described randomly oriented fiber plug comprises the cellulose acetate fibre that is combined in the random orientation in the filter-tip downstream plug of plug-space-plug.
9. filter assembly as claimed in claim 1, wherein:
Described filter assembly comprises at least one axial orientation fiber plug at least one place of the upstream and downstream that is arranged in described adsorbent, described at least one axial orientation fiber plug is combined in one or more filter tip sections, and described filter tip section is included in the described filter assembly with the quantity of the length that is enough to regulate described filter assembly.
10. filter assembly as claimed in claim 1, wherein:
Described adsorbent is selected from by molecular sieve, carbon and the group that constitutes thereof.
11. filter assembly as claimed in claim 1, wherein:
The size range of the described sorbent particles that sucks flue gas is between about 0.1 micron to about 10 microns.
12. a cigarette, it comprises the as claimed in claim 1 filter assembly attached with tobacco rod, wherein:
The described outer surface contact tipping paper that comprises the plug of randomly oriented fiber, described tipping paper is attached in filter assembly on the tobacco rod.
13. a smoking product, it comprises:
Tobacco rod; With
As each described filter assembly among the claim 1-11.
14. make filter-tip method for one kind, it comprises:
Place the plug of duplex axial orientation fiber with spaced apart relation;
The plug that will comprise randomly oriented fiber is positioned between the described duplex plug, thereby makes at upstream extremity and downstream end formation cavity every a duplex plug;
The adsorbent that will comprise the sorbent particles that can suck flue gas places cavity; And
In the described duplex axial orientation of heartcut fiber plug every one to form the duplex filter assembly.
CN200880117548A 2007-12-20 2008-12-22 Filter including randomly-oriented fibers for reduction of particle breakthrough Pending CN101873810A (en)

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PL2234509T3 (en) 2012-11-30
CO6220886A2 (en) 2010-11-19
EA017412B1 (en) 2012-12-28
AU2008340634B2 (en) 2013-05-16
EP2234509A1 (en) 2010-10-06
UA99496C2 (en) 2012-08-27
US20100006112A1 (en) 2010-01-14
EP2234509B1 (en) 2012-07-04
JP2011505851A (en) 2011-03-03
EA201070770A1 (en) 2010-12-30
BRPI0821407A2 (en) 2015-06-16
WO2009080368A1 (en) 2009-07-02
BRPI0821407B1 (en) 2019-03-12
PT2234509E (en) 2012-08-24
DK2234509T3 (en) 2012-10-08
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ES2390740T3 (en) 2012-11-16
KR20100094476A (en) 2010-08-26

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