CN101257810A - Filter or filter element for tobacco smoke. cigarette containing such a filter or filter element and method for producing such a filter or filter element - Google Patents

Abstract

The invention relates to a filter or filter element with a substantially cylindrical filter body, which contains, in particular, at least two different additives, the additives being located in at least two zones which are arranged one after the other in the longitudinal-axial direction of the filter body and/or in at least two zones, more particularly layers, which at least in sections lie one above the other in the radial direction of the filter body. The invention also relates to a filter or filter element for tobacco smoke, comprising a substantially cylindrical filter body that can be made from a material which in its initial state is flat, more particularly endlessly curled filaments, paper, fibrous webbing, textile material, non-woven and the like, the filter body comprising at least two zones which are arranged one after the other in the longitudinal-axial direction of the filter body, a tobacco-end zone containing an additive and a mouth-end zone being free from additive. The subject matter according to the invention permits better filtering of burnt products.; The invention also relates to a method which is particularly suitable for producing filters or filter elements for tobacco smoke, in which method a filter body is provided with at least two different zones, the additive being applied to a flat starting material from which the filter body is formed in substantially parallel strips and/or in layers one above the other.

Description

Tobacco smoke filter or filter element have the cigarette of this filter or filter element and the method for this filter of manufacturing or filter element

Technical field

The present invention relates to a kind of filter or filter element that is used for tobacco smoke, described filter or filter element have cylindrical basically filtering bodies.

Background technology

The tobacco smoke filter is used for cigarette with filter tip, and its effect is to small part the combustion product that produces in the result of combustion of tobacco process to be removed from cigarette before being inhaled into.As everyone knows, in order to improve the filter efficiency of tobacco smoke filter, should in filter, add additive, especially granule activated carbon.This can realize by different way according to the particular type of filter device therefor.

For example be known that to have the chamber of having filled activated carbon in the filter, combustion product is through this chamber during smoking, and combustion product to small part is absorbed by the active carbon particle in the chamber.But the shortcoming of this filter is, usually because the chamber filling extent limits, and chamber can not fill up fully, and this will form so-called bypass phenomenon, promptly has the partial combustion product can walk around activated carbon and be not detained.

This shortcoming can overcome by the filter or the filter element of integration, and wherein activated carbon evenly distributes in filtering material, thereby makes the whole cross section of filter can both be detained the product of burning.

This class monolithic filter can be divided into so-called spatial filter and so-called surface filter.Spatial filter is made by filter tow, and the continuous filament that this tow is curled by the stuffer box method constitutes.About 30% cellulose-2, the acetone soln of 5-acetic acid esters compresses through spinneret, acetone evaporation in spray silk tube, the multiply filament accumulates ribbon, and this ribbon carries out the stuffer box method subsequently and curls.Dry product then and it is pressed into sphere.Be pumped into filter tow and be processed into filter stick from described sphere at the filter stick make-up machine.In this process, filter tow stretches on stretching-machine, adds to make the bonding additive of filament, forms so-called slubbing afterwards along the transverse axis compacting, covers and be cut into the filter stick of final lengths with paper bag.

In this spatial filter, can comprise the active carbon particle of putting into silk screen or attached to the meticulous active carbon particle on the individual filament.For example, can be by being sprinkled into active carbon particle or starching water by applying activated carbon, in volatile organic carrier or the plasticizer liquid and activated carbon is brought into.In this method, granule activated carbon is uniformly distributed within the whole filtering bodies substantially.

In order to make surface filter, adopt flaky material (Flaechengebilde) to make raw material, paper for example, spun-bonded non-woven (Spinnfliese), fabric tissue or non-weaving cloth.In order to make filter, the flaky raw material that will be wrapped in earlier on the reel launches, and makes it to form bar-shaped product and along the transverse axis compacting, covers and is cut into filter stick by Len req with paper bag.Described flaky raw material can curl via wrinkling device (Kreppeinrichtung) with direction of advance before formation is bar-shaped abreast, can reach the purpose that reduces density of material and influence the filter suction resistance in this way.

In surface filter, by with activated carbon to flaky raw material, the especially doping of paper, and activated carbon is introduced filter.The paper filter of Can Zaing contains the little active carbon particle of particle size like this, and the latter is attached on the paper in paper-making process.Under this process conditions, activated carbon also is even distribution in whole filtering bodies.

The structure of space and surface filter and the detail of making can be referring to WO 01/28369A1.

In addition, the earliest among the unpub DE 10 2,004 048 651 of priority date, adopted fiber in the application, filament or self supporting film (Folien), other additive is contained in their inside, and the latter can improve fiber, the character of filament or self supporting film.Other additive of this class comprises plasticizer, markers, pigment and/or stabilizing agent.This class additive is to the not delay effect of cigarette inclusion.In addition, all additives both had been not only activated carbon, and fiber, and inner other the contained additive of filament and self supporting film all is equally distributed in whole filtering bodies.

US 3,311, and 519 disclose a kind of spatial filter, and it is made by traditional filter tow.This spatial filter has been added activated carbon, and wherein the activated carbon form that is strip places on the filter tow material of stretching.

The shortcoming of above-mentioned filter is, the amount that can introduce the activated carbon of filtering bodies is subjected to the restriction of the suction resistance that filtering bodies and smoker can also accept, and this suction resistance excessively can raise crossing under the high-activity carbon amount.Therefore, the delay effect that mainly relies on the tobacco filter of activated carbon is restricted.

Summary of the invention

So, the objective of the invention is to, a kind of filter or filter element and a kind of cigarette with this filter or filter element are provided, they can have better filtration to combustion product.A kind of method of making this filter or filter element is also proposed in addition.

Aspect filter or filter element, can reach above-mentioned target by the feature of claim 1 and 13.Then the feature by claim 14 reaches target of the present invention aspect cigarette.As for preparation method, then the feature by claim 15 reaches target of the present invention.

The present invention relates to following idea basically, promptly provides to have the tobacco smoke filter or the filter element of cylindrical filtering bodies basically, and described filtering bodies especially contains at least two kinds of different additives.Additive places in the zone of at least two arranged in succession on the filtering bodies y direction and/or places directly at least two local at least overlapping areas up and down upwards of filtering bodies, especially in the layer.

Theme of the present invention also is to have the tobacco smoke filter or the filter element of cylindrical filtering bodies basically, this filtering bodies can be the material of sheet by reset condition, especially the filament of Juan Quing, paper, fleece (Vlies), fabric tissue, non-weaving cloths etc. are made, and it is characterized in that, described filtering bodies has the zone of at least two arranged in succession on its y direction, wherein the zone of tobacco end has additive, and does not contain additive in the zone of mouth one side.

The space of the different additive of Xing Chenging isolates like this, though do not get rid of additive in the marginal portion in zone certain mixing is not arranged, and such precondition also is provided, and promptly different additives can cooperatively interact to improve total filter efficiency of filter.For example this can realize that by the appropriate selection of additive the effect of single additive has been strengthened in their cooperation.In addition, the invention provides a kind of possibility, promptly be detained and from cigarette, remove different combustion products, thereby enlarge the scope of filtrable combustion product by the selectivity of different additive.

The present invention is also for can adopt different additive to create condition, and wherein a kind of additive shields to another kind of or other additives.Preposition in this case additive filters out the inclusion harmful to the effect of rearmounted additive earlier from cigarette, thereby avoids itself and the contacting of rearmounted additive.For this reason, the present invention considers the different additive space is isolated, and promptly places in the zone of at least two arranged in succession on the filtering bodies y direction and/or places filtering bodies directly upwards at least two local at least overlapping areas up and down.

Another advantage that the subregion arrangement of this different additive brings is to adopt the different additive that undesirable chemical reaction may take place when evenly mixing mutually.Space isolation by above-mentioned additive can make this class additive freely bring into play its effect, and does not cause these additives that adverse effect takes place mutually.

In a preferred embodiment, described filter comprises by the sheet filtering material, the continuous filament of Juan Quing especially, paper, fleece, the filtering bodies that fabric tissue, non-weaving cloth etc. are made.The present invention is especially suitable to unite use with so-called surface filter, significantly improves its retention effect, thereby better brings into play the known advantage of surface filter, low especially relatively suction resistance and good biodegradability.

Additive can be placed on the sheet filtering material and/or be placed in one, thereby additive is introduced material internal and/or additive is applied on the surface of filtering material according to the type selecting of filtering material.

For the end face that makes the filter that the smoker can see is light color, especially be white in color, directly the zone of touching with mouth company can not contain additive substantially.

The present invention includes influences all of cigarette character additives, wherein preferably has the additive of delay effect, makes at least a additive comprise the preparation that the inclusion of cigarette is had the delay effect, especially has the preparation of selectivity delay effect.At this, additive can be made up of a kind of material or multiple mixture of ingredients.

The filter efficiency that strengthens, perhaps in general, just additive is to the raising of the effect of cigarette or cigarette character, can realize by the such means of preparation that at least a additive comprises the effect that strengthens at least a other additive.

Advantageously, at least a additive comprises sorbent (Sorptionsmittel), especially adsorbent or absorbent, thus the cigarette inclusion effectively is detained.

Described sorbent can comprise activated carbon, fluoropolymer resin, especially phenolic resins or metal oxide, and the hydrate of metal hydroxides and/or metal oxide wherein relates in particular to aluminium, silicon, the above-claimed cpd of titanium and/or magnesium.

In a preferred embodiment of the invention, at least a additive comprises catalyst, in particular for the catalyst of the oxidation of carbon monoxide, and wherein said catalyst or place the downstream of sorbent on the airflow direction or place under the sorbent.This layout of described catalyst has guaranteed to make the cigarette inclusion of catalyst poisoning to filter out from cigarette by the sorbent that places the catalyst upstream.If additive is arranged superposed up and down, also can expect this effect.

Described catalyst can comprise noble metal catalyst, platinum especially, the hybrid alloys of gold or Jin Heyin.

Total filter efficiency of described filter can further be improved by following manner, and promptly at least a additive comprises amine, especially primary amine or secondary amine is had the electrophilic reagent of selectivity delay effect.Electrophilic reagent with selectivity delay effect with combine according at least a other additive provided by the invention, thereby the different cigarette inclusions of relative wide spectrum can be filtered out from cigarette.

Be replacement or additional electrophilic reagent, at least a additive can comprise aldehydes or ketones, especially to acetaldehyde, and proton aldehyde (protonaldehyd), butyraldehyde or acetone-propionic aldehyde have the nucleopilic reagent of selectivity delay effect.Especially the cooperation of the cooperation of nucleopilic reagent and electrophilic reagent and different choice delay effect immediately makes various cigarette inclusion filter from cigarette.Two kinds of additives mode in the zone that different space isolates of being arranged in is realized the cooperation of electrophilic reagent and nucleopilic reagent by the present invention, described zone is on the y direction of cylindrical filtering bodies and/or the zone that radially isolates between the sky, thereby avoids taking place between the additive chemical reaction.

According to independent claims 13, tobacco smoke filter or filter element have cylindrical substantially filtering bodies, and this filtering bodies can be the material of sheet by reset condition, the continuous filament of Juan Quing especially, and paper, fleece, fabric tissue, non-weaving cloths etc. are made.In addition, described filtering bodies has the zone of at least two arranged in succession on its y direction, and wherein additive is contained in the zone of tobacco one side, and the zone of mouth one side does not contain additive.

With US 3,311,519 differences, the filter of independent claims 13 relates to the so-called surface filter of being made by flaky raw material.Owing to adopt flaky raw material, surface filter and spatial filter be difference to some extent structurally.Especially for surface filter, the feature of the channel design that is formed by the fold of flaky raw material is that spatial filter is unexistent.

According to the filter of the present invention of independent claims 13 or the advantage of filter element, promptly cost is lower than the twinfilter that adopts usually, because surface filter of the present invention only relates to single-filter.In addition, the visible end face of filter is white in color, and this is that most consumers are desired.By being untreated or the zone of additive-free preparation, promptly arrange the zone that does not contain additive in mouth one side of filter, the additive of tobacco one side is not spilt from filter substantially, thereby be not inhaled into.

Method of the present invention relates to following manner substantially, i.e. the strips of additive to be arranged parallel to each other basically, and/or the layer form of overlapping arrangement up and down is applied on the flaky raw material of filtering bodies.The band mode of filtering additive on the raw material in sheet applies and/or the layer mode of additive applies, for flaky raw material is arranged the condition created along a domain mode or a layer mode that transverse axis is configured as filter stick and is compacted the back additive.

A preferred embodiment of the present invention relates to following arrangement mode, be that one of described additive is applied on first band, another additive is applied on the second and the 3rd band, and the described second and the 3rd band is arranged in the both sides of article one strip length direction, and all is narrower than first band.This arrangement mode of different additive can improve the efficient that filter is produced especially, because can be cut to the final lengths of filter at the first band place of broad, so once cuts off the final products that can form two filters; Simultaneously because be the second and the 3rd narrower band that contains another additive at the two ends of first band of broad.The part of such second band and first band is formed a filter, and another part of second band and first band is formed another filter.This means that the present invention can realize by few relatively processing step the layout in arranged in succession zone on the y direction, particularly aspect filter stick is cut into.

Additive can apply by spraying and/or printing, and especially by ink-jet method, rotary printing method (Rotationsdruckverfahren) or silk screen print method apply.The correlation technique that this class is known in the print media manufacturing can be realized rapid and precise the applying of different additive function separation spatially.

Additive can apply in the mode of solution or dispersion, and solvent or decentralized medium will evaporate subsequently.Thus can be especially simply with additive coating or be printed on the flaky raw material.

To and elaborate the present invention with reference to the accompanying drawings with embodiment below.

Description of drawings

In the accompanying drawings:

Fig. 1 a represents that this material alternately prints with a kind of additive as making the raw-material sheet filtering material of surface filter;

Fig. 1 b represents filter stick, and this filter stick is made by the sheet filtering material through printing shown in Fig. 1 a;

Fig. 1 c represents cigarette, and this cigarette has the filter of being made by the filter stick shown in Fig. 1 b;

Fig. 2 a represents that this material alternately prints with two kinds of different additive as making the raw-material sheet filtering material of filter stick;

Fig. 2 b represents filter stick, and this filter stick is made by the sheet filtering material through printing shown in Fig. 2 a, and has indicated the cut position of filter stick;

Fig. 2 c represents cigarette, and this cigarette has the filter of being made by the filter stick shown in Fig. 2 b;

Fig. 3 a represents that this material alternately prints with two kinds of different additive, and two kinds of additives are present in the band that is arranged parallel to each other as making the raw-material sheet filtering material of filter stick;

Fig. 3 b represents filter stick, and this filter stick is made by the sheet filtering material through printing shown in Fig. 3 a; Fig. 3 c represents cigarette, and this cigarette has the filter of being made by the filter stick shown in Fig. 3 b;

Fig. 4 a represents that this material alternately prints with two kinds of different additive, and two kinds of additives are present in the band of different in width as making the raw-material sheet filtering material of filter stick;

Fig. 4 b represents filter stick, and this filter stick is made by the sheet filtering material through printing shown in Fig. 4 a;

Fig. 4 c represents cigarette, and this cigarette has the filter of being made by the filter stick shown in Fig. 4 b; With

Fig. 5 represents to make the graphic texture of the device of filter stick.

The specific embodiment

Fig. 1 a, 1b and 1c represent each stage that cigarette is produced, and just, raw material are the sheet filtering material, and intermediate products are that filter stick and final products are cigarette.Press 1a, it is the filter or the filter element of basis that the embodiment that 1b and 1c annotate relates to independent claims 13, wherein surface filter has the zone of at least two arranged in succession at the y direction of filtering bodies, and the zone of tobacco one side comprises additive, and the zone of mouth one side does not then contain additive.

As shown in Figure 1a, adopt the sheet filtering material as the raw material of making this filter or filter element.This sheet filtering material for example can be by the continuous filament that curls, paper, and fleece, fabric tissue, non-weaving cloth or similar flaky material are made.As shown in Figure 1a, sheet filtering material 2 is boundless in the longitudinal direction web material.Additive 3 is printed on the sheet filtering material 2 with the form of band 3, and each band 3 is arranged parallel to each other basically.Arrange the band 6 without printing between band 3, its width is equivalent to the width of band 3 substantially.Obtain the Printing Zone of alternately arranging and Printing Zone not like this, thereby obtain the arrangement that replaces of the band 3,6 that contains additive and do not contain additive.

Relevant therewith, should note the size shown in Fig. 1 a, the thickness/width dimensions of the layer that is especially applied on the sheet filtering material 2 is just for the ease of understanding.In fact, the thickness of band 3 is than thinner shown in Fig. 1 a.Be also shown in from Fig. 1 a, additive is present in the scope in 3 districts on the sheet filtering material, promptly on its surface.Yet additive also can inject filtering material 2 or soak into filtering material 2 with domain mode or band mode.Equally, these two zones needn't have same width as shown in the figure.The width ratio in the absolute width in zone and zone is neither restricted, and is same, also needn't occupy the whole width of sheet filtering material in X direction through the zone of printing.

These are equally applicable to other embodiment of the application.

For example can be to use sorbent, comprise activated carbon, silica or fluoropolymer resin as additive.Equally, the CO oxidation catalyst also can be used as additive.

Fig. 1 a through the sheet filtering material of printing by the mode of knowing on the filter stick make-up machine through pleating or roll volume (Rollen) and be processed into the filter stick 1a shown in Fig. 1 b.Fig. 1 b only expresses the part of filter stick 1a.The additive band 3 that is printed on the filtering material 2 forms arranged in alternating regions after filtering material 2 is processed into the filter stick 1a shown in Fig. 1 b.From Fig. 1 b as can be seen, different zones 3,6 become arranged in succession on the y direction of filter stick 1a, and then do not contain the zone 6 of additive and the alternately arrangement of zone 3 that contains additive.Filter stick 1a shown in Fig. 1 b that obtains like this, the position of pressing Fig. 1 b sign cuts off, and makes filter or filter element.The filter 1 that obtains thus is shown in Fig. 1 c, and it has zone 6 that does not contain additive and the zone 3 that contains additive.Shown in Fig. 1 c, filter 1 and cigarette 5 couplings, and also the zone 3 that contains additive is positioned at tobacco one side of cigarette, and the zone 6 that does not contain additive then places a side of mouth.

During use, contain the zone 3 of additive, for example in zone 3, have activated carbon, be detained the cigarette composition that produces in the smoking process.Place the zone that does not contain additive 6 of mouth one side to stop the additive in zone 3 to suck from filter 1 effusion with by the smoker.In addition, the zone 6 that does not contain additive also is white in color the end face of filter 1 according to consumer's wish.

Fig. 2 a, the embodiment shown in 2b and the 2c relate to the filter or the filter element of claim 1.Here raw material, intermediate product and final products in each technique process have also been identified.

Fig. 2 a represents to be printed with different additive, especially prints the sheet filtering material 2 of two kinds of different additive.Here, additive places on the sheet filtering material 2, makes between them spatially to isolate substantially.Equally, in this embodiment, shown size, especially gauge are just understood for convenient.

Among the embodiment shown in Fig. 2 a, the isolation of the space of additive is to apply additive by the mode with layer to realize, promptly is applied to the zone 3,4 of overlapping arrangement up and down.

Similar to the embodiment of Fig. 1 a, zone 3, the 4 length bearing of trends along filtering material 2 apply in the band mode, especially printing.Here, between each band that is arranged parallel to each other, certain distance is arranged, and the clear area that forms like this is without printing.The sheet filtering material 2 that obtains thus has the zone that contains additive 3,4 of alternately arranging and does not contain the zone 6 of additive, and alternately and basically extend along its length along the length direction of filtering material in these zones.Directly invest filtering material 2 lip-deep additives and also can inject filtering material 2 or immerse filtering material 2, make the layer or the zone 4 that are arranged in the outside directly contact with the surface of filtering material 2.Here, it is to place within the filtering material 2 by zone 3 that the space in 3,4 these two zones, zone isolates, and zone 4 places the mode on the surface of filtering material 2 to realize.

Zhi Bei filtering material 2 is processed to the filter stick shown in Fig. 2 b like this, through being cut to appropriate length, forms filter 1, and the latter is shown in Fig. 2 c.

The filter 1 that makes like this comprises the additive that two kinds of spaces isolate, and they are present in the filtering bodies footpath up and down in overlapping areas 3,4 or the layer.Here arranged radially is covered by arranged radially zone 4 outside in interior zone 3.Shown in Fig. 2 c, the zone 3,4 that contains additive is arranged in cigarette tobacco one side, and the zone 6 that does not contain additive then is arranged in mouth one side.

Embodiment shown in Fig. 3 a relates to the sheet filtering material, and this material is as the raw material of the filter 1 shown in Fig. 3 c.According to Fig. 3 a, multiple different additive, especially two kinds of different additives cross sheet filtering material 2 length bearing of trends with the form edge of band and are applied on the sheet filtering material 2, and especially printing is thereon.The banded zone of gained is arranged parallel to each other, and its edge directly joins.With Fig. 2 a, 2b, the embodiment shown in the 2c is opposite, and to isolate be not overlapping 3,4 about by the zone in the space of additive in this example, but the adjacent arrangement realization by zone 3,4.

Then, the filtering material 2 that prints like this is processed into filter stick 1a, shown in Fig. 3 b.Filter stick 1a is cut into single filter 1, shown in Fig. 3 b.Relevant therewith, it should be noted that the width in the zone 3,4 on band or the flaky raw material 2 doubles the width in the zone 3,4 of the filter 1 that obtains behind corresponding cut-out filter stick 1, shown in Fig. 3 b.

Filter 1 shown in Fig. 3 c has cylindrical substantially filtering bodies, wherein comprise multiple, especially two kinds, different additives.Here, described additive is present in the zone 3,4 of arranged in succession on the filtering bodies y direction.Therefore, the additive of arranging like this is space interval basically.

From Fig. 3 b, 3c as can be seen, original sheet filtering material 2 is positioned at the inside of filter stick 1a or filter 1, its periphery is surrounded by the zone 3,4 of arranged in succession on the length bearing of trend of filter 1 or filter stick 1a.

The embodiment of the filter that another one is relevant with claim 1 is shown in Fig. 4 a, 4b and 4c.This filter is realized the space interval of two kinds of different additive with the zone that does not contain additive.

, the zone 3,4 of different additive is applied with the adjacent arrangement of band mode for this reason, especially be printed on the filtering material 2 shown in Fig. 4 a.With embodiment 1a, 2a, 3a is similar, and zone 3,4 applies along the length bearing of trend that passes across filtering material 2 basically.Here, additive applies like this, promptly forms zone 3,4 alternately, and this two zone isolates with the zone 6 that does not contain additive.Here, a kind of in two kinds of additives contained in zone 4, is parallel to narrower regional 3 of zone 4 and contains another additive on its length direction.Here, the width that contains a kind of zone 4 of additive is the twice of width that contains the zone 3 of another kind of additive.

Shown in Fig. 4 a, the part of graded area 3,4 replaces once more with the zone 6 that does not contain additive.

Jia Gong sheet filtering material 2 continues to be processed into a kind of filter stick subsequently shown in Fig. 4 b like this.According to Fig. 4 b, filter stick 1a respectively non-additive regional 6 and the wide zone that contains additive 4 cut off, make filter 1, and non-additive regional 6 width doubles the zone 3 that contains another additive equally.By this method with special mode efficiently make by three kinds different, the filter 1 that the zone that the space isolates constitutes is seen Fig. 4 c.This filter 1 comprises and comes the non-additive regional 6 of mouth one side, in this upstream, zone the zone 3 that contains a kind of additive is set according to the flow direction of cigarette, and the flow direction by cigarette is provided with the zone 4 that contains another kind of additive again in the upstream equally.

Fig. 2 c, 3c, the filter shown in the 4c, or the aligning method between these filter area can make up mutually.For example, three kinds of different additives so can be arranged, be made two kinds of additives with in form down the overlapping on the raw material of ribbon layer, the third additive is then with the form of another band and be arranged in parallel by the two-layer band that constitutes.The filter made from this raw material comprises a zone, and this zone has arranged radially at interior subregion and arranged radially subregion outside.On the y direction of this filter, this front or back by the zone that two kinds of additives at interval that have living space are formed has another to contain the zone of the 3rd additive.This filter also can be combined with the non-additive zone of mouth one side.

[62] disclosed filter may be constituted filter element equally, it is used from twinfilter with other filter element one or multiple filter designs.

[63] should emphatically point out, Fig. 4 a, 4b and 4c only relate to a kind of in the multiple embodiments of the present invention, and do not require that each filtration zone has same width.

[64], or common have two kinds of advantage or modes of action with filter of the different additive that the space isolates as for having two kinds of delay materials that have living space and isolate, can be referring to following argumentation.

[65] different additives can so be selected, and promptly a kind of additive shields to another additive.For example, use activated carbon, then place the CO oxidation catalyst in the zone in flow direction downstream in tobacco one side.What the more downstream area on the moving direction of plume can be mouth one side does not contain the additive zone.In this case, thereby activated carbon is detained the composition of cigarette catalyst can effectively be worked, if not as the upstream region of front filter, the cigarette composition will cause the CO oxidation catalyst to be poisoned.If additive is not alternately to place on the y direction of filter 1, but overlapping layer about adopting radially also can reach same purpose.

[66] Fig. 2 c, filter shown in 3c and the 4c or filter element make two kinds of additives be used equally becomes possibility, undesirable chemical reaction may take place in these two kinds of additives when evenly mixing mutually, for example worry the reaction that takes place between nucleophilic and close electric additive.Space by delay material of the present invention isolates, and the additive with parent's electricity of nucleophilic all can optionally delay effect of each self-sustaining.Like this, nucleophilic additive selectivity is detained, aldehyde for example, and the additive of parent's electricity optionally is detained, for example amine.Place the zone that does not contain additive 6 of mouth one side, it can be chosen wantonly, and except giving the outward appearance of requirement, promptly white end face can also avoid additive to suck from filter leaks with by the smoker.

[67] be used for shop drawings 1,2, the method for filter shown in 3 and 4 will elaborate with embodiment and manufacturing installation shown in Figure 5 below.

Embodiment 1:

With specification is 2, the filter tow of 1Y48 (thin silk thread density 2.33dtex; Total linear density 53333dtex) at Firma Hauni, 8% triacetyl glycerine is processed and sprayed to the conventional two-stage net puller (Streckwerk) 7 of Hamburg on the KDF2.Leaving after the guide roller, is that the filter tow net 2 of 150mm imports a pair of calenders that heated 8 and is calendering under the 40kg/cm at effective line pressure with minimum widith.The diameter that groove calender 8 is arranged is 230cm, and groove width is 350mm, has 10 road shaping grooves (Profilrillen) on every centimetre, does not slot in other place.They are heated to 150 ℃ with silicone oil.The section of groove is trapezoidal, and its top width is 0.4mm, and the degree of depth is 0.5mm.

The fleece 2 that makes like this leaves calender 8 warp let-off spray system 9 afterwards, and activated carbon suspension is coated on the continuous web material by the closable baffle plate that cracks (Schlitzblende) from the form of rotor with droplet therein.In this process, when web material was passed through spray system continuously, baffle plate repeated opening and closing fast, thereby alternately formed zone 3,4 that applies suspension and the zone 6 that does not contain additive along its length on web material.By selection, can determine the width that contains additive zone 3,4 and do not contain additive zone 6 to crack flapper closure frequency and web material speed.By spray system, the switching frequency of the baffle plate that cracks is about 4sec to web material with 10m/min in this example ^-1, wherein said baffle plate is opening and closing in the same time interval all.Mix the width of band of activated carbon and the width of band 6 that do not contain additive all respectively for 21mm.

Web material is left the cross-ventilation formula baker 10 that spray system 9 is admitted to 150 ℃ afterwards.The oven dry segment length of baker 10 is 4m, and it can guarantee the oven dry and activated carbon the fixing on fleece 2 of suspension.

Leave after the baker 10, the fleece 2 that mixes activated carbon is at Firma Koerber, the filter stick make-up machine 11 that Hamburg is commercially available, and KDF2 is last to insert mask (Einlaufduese) by importing, weave into rope form, cover and be cut to the filter stick of length 126mm with paper bag.The off-position that is noted herein that filter stick should be in the centre or additive-free regional 6 the centre of mixing activated carbon zone 3.Mixing the activated carbon amount that applies in the activated carbon zone 3 is 5mg/mm.

Filter stick is cut into the filter tip that length is 21mm, and half of its length is mixed with activated carbon, and second half does not contain additive.The zone of mixing activated carbon 3 of filter tip 1 is connected with the tobacco rod of commercially available Luzhou-flavor cigarette 5.

Embodiment 2:

[73] manufacture method of filter stick 1 is suitable with embodiment 1, but the suspension of the CO oxidation catalyst that mixes in order to layer mode replaces activated carbon.The loading that mixes the filter stick of CO oxidation catalyst zone is 5mg/mm.Filter stick is cut into the long filter tip of 21mm by following mode, and promptly half length of filter tip is mixed with the CO oxidation catalyst, and second half does not contain additive.Filter tip is mixed with an end of oxidation catalyst with it and the tobacco rod of commercially available Luzhou-flavor cigarette 5 is joined.Therefore, example 1 and example 2 and Fig. 1 a, 1b and 1c are consistent.

Embodiment 3:

[74] suitable with embodiment 1, continuous fabric web is by the spray system 9 of two series connection.In first spray system 9, suitable with embodiment 1, the wide activated carbon suspension band of the 21mm that on the whole width of fleece 2, is interspersed and be similarly 21mm wide do not contain the additive zone.In second spray system 9 in downstream, the water slurry of the zone of uncoated coating CO oxidation catalyst before on the web material.

[75] after the continuous web material of oven dry, be cut into the filter stick of 126mm length according to embodiment 1, promptly off-position all is in the centre that is mixed with activated carbon or is mixed with catalyst zone.

[76] filter stick is cut into the long filter tip of 21mm, half of its length is mixed with activated carbon, and second half is mixed with the CO oxidation catalyst.The tobacco rod of the described commercially available Luzhou-flavor cigarette 5 of an end of mixing activated carbon of filter tip 1 and embodiment 1 links to each other.

Embodiment 4:

[77] suitable with embodiment 1, continuous web material 2 is by the spray system 9 of two series connection.In first spray system 9, suitable with embodiment 2, the wide CO oxidation catalyst suspension band of the 21mm that on fleece 2, is interspersed and be similarly the wide uncoated areas of 21mm.In second spray system 9 in downstream, on the web material zone that has applied the CO oxidation catalyst before, apply the suspension of activated carbon water again.

[78] after the continuous web material of oven dry, be cut into the filter stick of 126mm length according to embodiment 1, promptly off-position all is in zone 3,4 that is mixed with additive or the centre that does not contain additive zone 6.

[79] filter stick 1 is cut into the filter tip of long 21mm, its half length is mixed with CO oxidation catalyst and activated carbon, and second half is not then for containing the zone of additive.The tobacco rod of the described commercially available Luzhou-flavor cigarette 5 of the end face that filter tip 1 is mixed with additive zone 3,4 and embodiment 1 links to each other.This example and Fig. 2 a, 2b and 2c meet.

Embodiment 5:

[80] length is that the manufacture method of cigaratte filter of 21mm is suitable with embodiment 3, and half of its length is mixed with activated carbon, and second half is mixed with menthol.The tobacco rod of the described commercially available Luzhou-flavor cigarette of the end that cigaratte filter is mixed with activated carbon 3 and embodiment 1 links to each other.Embodiment 3 and 5 and Fig. 3 a of simplifying, 3b conforms to 3c.

Reference numeral

1 filter

1a filters rod

2 sheet filtering materials

3 additive A

4 additive Bs

5 cigarettes

6 do not contain the additive zone

7 net pullers

8 calendering rollers

9 spray pouring systems

10 air convections oven dry device

11 cross filter-stick forming device

Claims (18)

1. one kind has the filter or the filter element of cylindrical filtering bodies basically, this filtering bodies especially contains at least two kinds of different additives, wherein said additive is present in the zone of at least two arranged in succession on the filtering bodies y direction and/or is present in filtering bodies directly upwards at least two local at least overlapping areas up and down, especially in the layer.

2. according to the filter of claim 1, it is characterized in that: described filter comprises by the sheet filtering material, the continuous filament of Juan Quing especially, paper, fleece, the filtering bodies that fabric tissue, non-weaving cloth etc. are made.

3. according to the filter of claim 2, it is characterized in that: described additive be present on the sheet filtering material and/or among.

4. according to the filter of at least one of claim 1～3, it is characterized in that: the zone that especially directly contacts mouth one side does not contain additive substantially.

5. according to the filter of at least one of claim 1～4, it is characterized in that: at least a additive comprises the preparation that the inclusion of cigarette is had the delay effect, especially has the preparation of selectivity delay effect.

6. according to the filter of at least one of claim 1～5, it is characterized in that: the effect that at least a additive comprises another additive has the preparation that strengthens effect.

7. according to the filter of at least one of claim 1～6, it is characterized in that: at least a additive comprises sorbent, especially adsorbent or absorbent.

8. according to the filter of claim 7, it is characterized in that: at least a additive comprises catalyst, the oxidation catalyst of carbon monoxide especially, wherein said catalyst or place the upstream of sorbent on the airflow direction or place on the sorbent.

9. according to the filter of claim 7 or 8, it is characterized in that: described sorbent comprises activated carbon, fluoropolymer resin, especially phenolic resins or metal oxide, the hydrate of metal hydroxides and/or metal oxide wherein relates in particular to aluminium, silicon, the above-claimed cpd of titanium and/or magnesium.

10. according to Claim 8 or 9 filter, it is characterized in that: described catalyst comprises noble metal catalyst, platinum especially, gold, or the hybrid alloys of Jin Heyin.

11. the filter according at least one of claim 1～10 is characterized in that: at least a additive comprises amine, and especially the distinctive nitra-amine of primary amine or secondary amine and/or tobacco has the electrophilic reagent of selectivity delay effect.

12. the filter according at least one of claim 1～11 is characterized in that: at least a additive comprises aldehydes or ketones, especially to acetaldehyde, and proton aldehyde, butyraldehyde or acetone-propionic aldehyde have the nucleopilic reagent of selectivity delay effect.

13. one kind has the tobacco smoke filter or the filter element of cylindrical filtering bodies basically, described filtering bodies can be the material of sheet by a kind of reset condition, especially the continuous filament of Juan Quing, paper, fleece, fabric tissue, non-weaving cloths etc. are made, it is characterized in that: described filtering bodies has the zone of at least two arranged in succession on its y direction, and the zone of tobacco one side contains additive, and the zone of mouth one side does not contain additive.

14. cigarette with filter or filter element of at least one of claim 1～13.

15. method of making tobacco smoke filter or filter element, comprise the filtering bodies that contains at least two kinds of different additive is provided, the strips of described additive to be arranged parallel to each other basically, and/or the layer form of overlapping arrangement up and down is applied on the flaky raw material of filtering bodies.

16. method according to claim 15, it is characterized in that: one of described additive is applied on first band, and another additive is applied on the second and the 3rd band, and the described second and the 3rd band is arranged in the both sides of article one strip length direction, and all is narrower than first band.

17. the method according to claim 15 or 16 is characterized in that: described additive applies by spraying and/or printing, and especially by ink-jet method, rotary printing method or silk screen print method apply.

18. the method according at least one of claim 15～17 is characterized in that: described additive applies in the mode of solution or dispersion, and solvent or decentralized medium evaporate respectively subsequently.

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