CN102843923A

CN102843923A - Perforated cigarette paper

Info

Publication number: CN102843923A
Application number: CN2011800178352A
Authority: CN
Inventors: 伯恩哈德·埃特辛格
Original assignee: Delfortgroup AG
Current assignee: Delfortgroup AG
Priority date: 2010-04-01
Filing date: 2011-03-30
Publication date: 2012-12-26
Anticipated expiration: 2031-03-30
Also published as: KR20130045859A; EP2552253A1; PL2552253T3; BR112012024652B1; MY161949A; JP2013524026A; WO2011120687A1; EP2552253B1; JP5882297B2; BR112012024652A2; US20130104915A1; ES2608472T3; DE102010013669A1; CN102843923B; KR101811074B1

Abstract

The invention relates to cigarette paper (1) providing self-extinguishing properties to a cigarette made therefrom, wherein the cigarette paper comprises at least one discrete region (2) that is perforated and comprises a permeability to air that is greater than the permeability to air outside of the perforated region. The perforated region is preferably present in a finished filter cigarette in the vicinity of the filter (5).

Description

The perforation cigarette paper

Technical field

The present invention relates to a kind of cigarette paper, this cigarette paper provides the self-gravitation characteristic to the cigarette by this cigarette paper manufacturing and has at least one and disperses punched areas.

Background technology

Because the legal regulation that relevant cigarette self-extinguishing goes out need provide the cigarette of guaranteeing this self-gravitation in cigarette industry.Glow cigarette thereby the furniture that will be prevented from burning, bed or other family's textiles not being careful and staying.Thereby, manage to produce the cigarette that when the cigarette of glowing contacts with other materials, has the reduction possibility of lighting these materials.

The test description of lighting possibility of confirming cigarette is in ASTM E2187-04b.This test comprises the cigarette of glowing is placed in the substrate of being made up of 10 layers of filter paper.Should test the execution of 40 cigarettes, and confirm to arrive the cigarette filter percentage of the cigarette of self-gravitation in substrate before at red-hot awl.

Within the scope of the invention, the self-gravitation characteristic for example can be understood as that referring to most of at least cigarette of testing according to ASTME2187-04b satisfies above-mentioned standard, that is to say that percentage is greater than 50%.

Typical cigarette is made up of tobacco, and it forms by the cigarette paper parcel and with cigarette paper and is typically columniform plume.Common and the filter tip adjacency of plume, filter tip typically is made up of estron.Filter tip and plume are wrapped up by tipping paper.Tipping paper is connected to plume with filter tip.

The self-gravitation of cigarette realizes through the respective design of cigarette paper as a rule, that is to say the parcel tobacco paper respective design and realize.Cigarette paper is designed so that diffusion constant is lower, and is lower in some zones of cigarette paper at least, thereby the oxygen of keeping smoldering process is not enough to arrive red-hot awl.As a result, the cigarette self-extinguishing that glows goes out.

Typically, cigarette paper is made up of cellulose fibre, obtains through timber, flax or other materials.Also can use the mixture of the cellulose fibre of separate sources.Cigarette paper has the 10g/m of being typically ²To 60g/m ²Paper weight, 20g/m wherein ²To 35g/m ²Scope be generally preferred.

Cigarette paper also usually comprises inorganic, mineral filler, and its mass fraction with 10% to 40% adds in the paper.The packing material that often uses is chalk (calcium carbonate), but also can use other oxides and carbonate, for example magnesia and aluminium hydroxide.

Cigarette paper can also be equipped with burning salt, this increase or reduce the combustion rate of paper.Natrium citricum and potassium citrate and composition thereof very often use, and add in the paper with the amount of 0% to 5% paper quality.Yet the group of the burning salt of technological correlation comprises citrate, malate, tartrate, cellulose acetate, nitrate, succinate, fumarate, gluconate, glycollate, lactate, oxalates, salicylate, α hydrogen-oxygen caprylate and phosphate in addition.

Cigarette paper is typically produced has the volume of 0.3m to width between the 5m, and for example heavily is cut into reel, and it is that obtain according to the cigarette girth, typical in the width of 9mm to 35mm that this reel has.

A kind of possibility the method that obtains self-gravitation is to select following cigarette paper, and its diffusion constant is owing to the paper production process and lower, thereby cigarette oneself is extinguished.Yet, the result, the air that enters into cigarette flows, and that is to say air permeability, highly reduces owing to pressure reduction.This has confirmed it is disadvantageous, and this is because the smog in the plume of cigarette only can dilute on very little degree ground through the air that gets in smoking process, thereby obviously increases for tar, nicotine and the smoke from cigarette value that is in particular carbon monoxide.For example, the air permeability of this paper is less than (1CORESTA unit=1CU=1cm of 10CORESTA unit ³/ (cm ³Divide kPa)), the cigarette paper that wherein typically is not self-gravitation has 20CU to the air permeability between the 300CU.

This unfavorablely be eliminated through on the whole surface of cigarette paper, cigarette paper being bored a hole.The macropore of comparing with the natural hole structure thereby in paper, form, and increase air permeability, but only the diffusion constant of paper is produced very little variation.Enter into the dilution air flow of cigarette during the smoking process thereby become possibility, and in above-mentioned test, the smoke from cigarette value is lowered under the situation of not damaging self-gravitation of cigarette of making made of paper by this.

This perforation can be implemented through distinct methods.For example, use the static perforation, wherein paper is transmitted through one or more spark-discharge gaps, and spark-discharge gap corrodes pore-forming on paper.These holes typically have 5 μ m to the diameter between the 100 μ m.And, can use laser beam perforation, this generates bigger slightly hole, and it has 50 μ m to the representative diameter between the 500 μ m.Further be exemplified as machine drilling, wherein pin or similar means produce the hole in paper.These holes have 100 μ m to the representative diameter between the 2000 μ m.

The air permeability that utilizes method for punching to realize can be very high, for example up to surpassing 6000CU, although cigarette paper be perforated usually into make air permeability after the perforation at 50CU between the 500CU.

Perforation procedure can be carried out the width of rolling or reel on the separate private punch after paper production.Certainly, on cigarette machine, boring a hole also is fine through arbitrary desired method for punching, that is to say, produce cigarette or before processing similar tobacco product by cigarette paper on the cigarette machine, among or all passable afterwards.

Yet aspect this cigarette of making made of paper, the enterprising eleven punch 11 on the whole surface of cigarette paper (said cigarette paper has lower initial air permeability) has significant disadvantages in smoker's approval.Because higher air permeability, many diluent airs flow into cigarette during smoking process.Plume and perforation cigarette paper are exhausted during smoking process then.Diluent air can flow into zone that cigarette passes through thereby the suction each time the cigarette of glowing carried out through the smoker and during smoldering process, being reduced.This causes the smoker to suck a certain amount of tar, nicotine and carbon monoxide, and this increases through aspirating each time along with plume correspondingly becomes shorter.Smoker thereby feel cigarette become " stronger " through aspirating each time.Thisly feel it is undesirable.

A kind of possibility that compensates this effect is on the length of plume, not select constant air permeability; But it is opposite; Through being bored a hole, the cigarette stream spirogram continuous air permeability flow diagram is provided along the cigarette axle; Thereby during smoking process, the smoke from cigarette value is reduced to the maximum possible degree through the increase of suction each time.Repeating continuous air permeability flow diagram therefore will produce at the enterprising row of cigarette paper web through perforation.

Although this method is fine in theory, key technical problem appears.On the one hand, the regulation of perforating apparatus that is used to produce this Continuous Flow spirogram is very harsh, and the continuous measurement of the air permeability of this regulation only can inaccurately be implemented, and infeasible when high speed.If possible, it is also corresponding lower to produce the speed at this flow diagram place.

On the other hand, the ring-type plume that on cigarette machine, forms by cigarette paper must this continuous air permeability flow diagram begin the place and end accurately cuts, thereby the air permeability flow diagram is positioned at the tram on the cigarette of processing.Yet if possible, the beginning of flow diagram locates because the continuous series of air permeability and only detecting to inaccuracy very much.

Therefore, the objective of the invention is to overcome shortcoming of the prior art.

Summary of the invention

The object of the invention is realized through cigarette paper; This cigarette paper provides the self-gravitation characteristic to the cigarette by this cigarette paper manufacturing; Wherein said cigarette paper comprises at least one discrete areas, and this discrete areas is perforated, and the air permeability that has is greater than the air permeability outside first punched areas.

In an embodiment of said cigarette paper, the air permeability in said first punched areas is constant on whole punched areas.

In an embodiment of said cigarette paper, the air permeability in said first punched areas is from 50CU to 2000CU, preferably from 100CU to 1000CU.

In an embodiment of said cigarette paper, the width of said first punched areas at 2mm between the 25mm, preferably at 4mm between the 12mm, more preferably at 5mm between the 9mm.

In one embodiment; Said cigarette paper further comprises short side A; This weak point side A is intended in the face of the filter tip in the cigarette of processing; Wherein said first punched areas be positioned at contiguous said short side A cigarette paper length 1/3rd, be preferably placed at contiguous said short side A cigarette paper length 1/4th in, and more preferably be positioned at contiguous said short side A cigarette paper length 1/5th.

In one embodiment; Said cigarette paper further comprises short side A; This weak point side A is intended in the face of the filter tip (6) in the cigarette of processing, and wherein the average air permeability in 1/2nd or 1/3rd of the cigarette paper length of contiguous short side A is greater than the average air permeability of the remainder of said cigarette paper.

In one embodiment, said cigarette paper comprises at least the second discrete areas, and this second discrete areas is perforated, and separates with first punched areas through unperforated annular region.

In an embodiment of said cigarette paper, second punched areas is than the said further away from each other short side of said first punched areas.

In an embodiment of said cigarette paper, the air permeability in said second punched areas is lower than the air permeability in said first punched areas.

In one embodiment, said cigarette paper comprises the discrete areas that at least one is other, and this other discrete areas is perforated, and separates with said second punched areas with said first punched areas through at least one unperforated annular region.

In an embodiment of said cigarette paper, said other punched areas is than said first punched areas and the said further away from each other short side A of said second punched areas.

In an embodiment of said cigarette paper, the said other interior air permeability of punched areas is lower than the air permeability in said first punched areas and said second punched areas.

In an embodiment of said cigarette paper, said second punched areas and/or the said other interior air permeability of punched areas are constant on corresponding all punched areas.

In an embodiment of said cigarette paper, the air permeability in said second punched areas and/or the said other punched areas is from 50CU to 2000CU, preferably from 100CU to 1000CU.

In an embodiment of said cigarette paper, the width of said second punched areas and/or said other punched areas at 2mm between the 25mm, preferably at 4mm between the 12mm, and more preferably at 5mm between the 9mm.

In an embodiment of said cigarette paper, the air permeability outside the punched areas is less than 15CU, preferably less than 10CU.

In one embodiment, said cigarette paper (outside the punched areas with within) the average diffusion rate of diffusivity or said cigarette paper less than 0.35cm/s, preferably less than 0.25cm/s, and be more preferably less than 0.20cm/s.

In one embodiment; Said cigarette paper comprises one or more mineral fillers; This mineral filler is selected from the group of being made up of carbonate and oxide; Be preferably selected from the group of forming by calcium carbonate, aluminium hydroxide and magnesia, and the weight percent of said one or more mineral fillers is preferably from 10% to 40% especially.

In one embodiment; Said cigarette paper comprises one or more burning salt; This burning salt is selected from the group of being made up of citrate, malate, tartrate, cellulose acetate, nitrate, succinate, fumarate, gluconate, glycollate, lactate, oxalates, salicylate, α hydrogen-oxygen caprylate and phosphate; Be preferably selected from the group of forming by natrium citricum and potassium citrate, and the content of said one or more burning salt is by weight especially preferably up to 5%.

In one embodiment, said cigarette paper has 10g/m ²To 60g/m ², preferred 20g/m ²To 35g/m ²Paper weight.

In addition; The object of the invention realizes that through a kind of band filter tipped cigarette this band filter tipped cigarette comprises according to cigarette paper of the present invention, and further comprises filter tip and tipping paper; Distance between wherein said tipping paper and said first punched areas is less than 10mm, preferably less than 5mm.

In addition, the object of the invention realizes that through a kind of method that is used to produce according to cigarette paper of the present invention said method comprises through static perforation, laser beam perforation and/or machine drilling to form the perforation step of at least one punched areas.

In an embodiment of this method, said perforation step on the cigarette machine or alternately with equipment that said cigarette machine separates on implement.

In addition, the object of the invention realizes through the purposes that is used to produce the paper (body paper) according to cigarette paper of the present invention according to the method for the invention, wherein said paper be provided as have 0.3m to 5m or alternately 9mm to the form of the paper web of the width of 35mm.

In an embodiment of said purposes, the air permeability of said body paper is less than 15CU, preferably less than 10CU.

In an embodiment of said purposes, said body paper has less than 0.35cm/s, preferably less than 0.25cm/s, most preferably less than the diffusivity of 0.20cm/s.

In an embodiment of said purposes; Said body paper comprises mineral filler; This mineral filler is selected from the group of being made up of carbonate and oxide; Be preferably selected from the group of forming by calcium carbonate, aluminium hydroxide and magnesia, and the weight percent of said one or more mineral fillers is preferably from 10% to 40% especially.

In an embodiment of said purposes; Said body paper comprises one or more burning salt; This burning salt is selected from the group of being made up of citrate, malate, tartrate, cellulose acetate, nitrate, succinate, fumarate, gluconate, glycollate, lactate, oxalates, salicylate, α hydrogen-oxygen caprylate and phosphate; Be preferably selected from the group of forming by natrium citricum and potassium citrate, and the content of said one or more burning salt is by weight especially preferably up to 5%.

In an embodiment of said purposes, said body paper has 10g/m ²To 60g/m ², preferred 20g/m ²To 35g/m ²Paper weight.

In addition, the object of the invention is realized through the purposes that cigarette paper according to the present invention is used to produce according to cigarette of the present invention.

The fact that the present invention is based on does; Have surprisingly been found that, needn't produce continuous gas permeability flow diagram, the discrete areas with constant air permeability is arranged but be enough on the contrary on cigarette paper, bore a hole; This discrete areas is arranged near cigarette paper, to realize equal good result.

If not enough near a filter-tip dispersion punched areas, because the smoke from cigarette value is still too high, the other discrete areas that then has different air permeabilities can produce through perforation certainly, and subsequently correspondingly near the end of cigarette, is lighted with quilt.Common two this dispersion punched areas are sufficient.

If two or more dispersion punched areas (watching along treating the longitudinal direction by the cigarette of this paper production) arrange then still preferably have the trend that increases air permeability along the direction towards cigarette holder continuously, that is to say that the end opposite with the end will be lighted.For example, preferably be higher than the air permeability in the remainder of cigarette paper near the average air permeability among the two/a gang of 1/3rd of the cigarette paper of cigarette holder.

Although the reason of this effect is not fully realized, following explanation can point out how to realize this effect.During smoking process, the suction nozzle place cigarette produces with respect to the negative pressure of surrounding air, so that air communication is crossed cigarette and through filter tip smog is delivered to the smoker.This negative pressure reduces along cigarette, thus between the position in red-hot awl dead ahead and surrounding air the approximate pressure reduction that do not exist.

So be arranged in the following zone of plume near the dispersion punched areas of cigarette filter, in this zone, the pressure reduction between surrounding air and the plume inside is higher during smoking process, that is to say, quite a large amount of air can flow in the plume.Near red-hot awl and further away from each other in the zone of suction nozzle, this pressure reduction is littler.Therefore, these zones are little to the volume of air role that flow in the cigarette, if these zones are puncherless, then the smoke from cigarette value during the suction had slight influence, that is to say to have lower air permeability.

Because punched areas is disperseed in essence; And obviously separate with unperforated annular region; Then punched areas can obviously detect through optical pickocff; Making the cutting process on paper feed and the cigarette machine is not difficult synchronously, thereby the discrete areas on each cigarette is positioned near filter-tip desired position.

In addition, the air permeability in each punched areas is constant.Therefore, perforating apparatus only need be to connect and to cut off corresponding to the frequency of web speed.This is easier than deferring to continuous air permeability flow diagram.And because the perforation power of perforating apparatus can easily regulate when said equipment is switched on or cuts off, thereby the perforation with discrete areas (yet air permeability is constant in this zone) of different air permeabilities can not cause difficulty.

Description of drawings

Hereinafter, some examples will be explained desired invention effect.

Fig. 1 is the schematic illustration that has according to the cigarette of the exemplary embodiment of cigarette paper 1 of the present invention, and cigarette paper 1 comprises first punched areas 2, second punched areas 3 and other punched areas 4.In this illustration, cigarette paper 1 partially opens from the tobacco column 7 of cigarette.The filter tip 6 that part is wrapped up cigarette paper 1 and short side A and tipping paper 5 are also by illustration.

The particular perforation pattern of the cigarette paper of the desired effect of Fig. 2 Display Realization.This pattern is produced by the exemplary production process of machine-processed cigarette.Among Fig. 2 by the punched areas of the wrapping paper of numeral corresponding to those zones among Fig. 1.When producing cigarette, the ring-type plume at first forms, and then along the line B section of being cut into, is measured as the Double Length of the plume of cigarette.In the later step of cigarette production process, the Double Length of this plume part is cut into two sections and separate along axial direction along line C, thereby can place the filter tip of Double Length in the centre.The filter-tip subregion that closes on of the filter tip of whole Double Length and plume utilizes the tipping paper of double width bonding and reel.Afterwards, the dual cigarette that is connected by the filter tip of Double Length is cut into two cigarettes through the last cutting of filter-tip centre.To can also be applicable to other modes that cigarette is produced through the pattern that perforation is produced on cigarette paper.

The specific embodiment

The starting point of each example is the cigarette paper with following specification:

Diffusivity is the diffusion constant [cm of paper ²/ s] divided by the thickness [cm] of paper.It is a carry-over factor, and the thickness that is independent of paper has been described, with the gas flow of given concentration difference through paper.Diffusivity can for example be utilized the CO of Sodim company ₂Diffusion instrument is measured.

Certainly; The result can also utilize other cigarette paper equally preferably; For example have the cigarette paper of different paper weight, different filler and filler percentage, different burning salt and different burning salt percentages and realize that the air permeability that needs only cigarette paper is correspondingly low before perforation, that is to say typically less than approximate 15CU; Perhaps the diffusion constant of cigarette paper is less than approximate 0.35cm/s, to guarantee the self-gravitation by the cigarette of this cigarette paper manufacturing.

The static perforation on its whole surface then of this cigarette paper, thereby the air permeability of realization 50CU, 100CU, 150CU and 200CU.

Other pattern is by identical cigarette paper preparation, and what wherein substitute whole surface is that discrete areas is perforated.These zones are designed to band, thereby punched areas has Rack, but center on cigarette fully along the circumference direction.Yet paper is equipped with one or two band, why more band can't be provided although have no reason.The specification of these paper is listed in the table 1.

Table 1: the specification of pattern

* distance for from the forward edge of tipping paper to the gap that begins that disperses punched areas.

The comparable air permeability of * is the air permeability of the cigarette paper of enterprising eleven punch 11 on the whole surface of cigarette paper, and it provides identical smoke from cigarette value to cigarettes tested with cigarette paper in the discrete areas middle punch.

Cigarette with following specification is by all made of paper making:

These specifications are understood as that and are merely exemplary that the present invention can be applicable to have arbitrary other design of cigarettes that can compare effect certainly.

The ignition propensity of all cigarette sample is at first tested according to ASTM E2187-04b.According to ASTM E2187-04b, each cigarette paper is tested 40 cigarettes, 90% in the cigarettes tested in all samples or more self-gravitations are wherein at the notable difference of not finding between the sample on the statistics.

Through the method that proposes among the DIN ISO 4387 to the further smoking of cigarette.Utilize this method, 35cm in 2 seconds ³Volume each minute suction nozzle of being inhaled into the cigarette of glowing.This 35cm ³Suction be called as suction.This process repeats, and is drawn onto less than the minimum length by prescribed by standard up to cigarette.Smog is inhaled into through the glass fibre filter tip, and it is subsequently by chemical analysis.In view of the above, the dry and cold condensate (" tar ") and the nicotine that do not contain nicotine are determined, and usually provide with the unit of every cigarette mg.

Machine smoking is implemented on the smoking machine of Borgwaldt RM20 type, yet it is modified, thereby different glass fibre filter tips is passed in the suction each time of cigarette, thereby the smoke from cigarette value of suction can be determined after analysis each time.In this way 20 cigarettes in each pattern are carried out machine smoking.

Because cigarette is lighted when aspirating for the first time, thereby suction for the first time is an exception about its smoke from cigarette value, and will from Consideration, get rid of.Also possible is that during the machine smoking of standard, because cigarette is lower than the minimum length of regulation during aspirating, thereby last suction can not fully be implemented.This suction (" part suction ") is recorded into the part of whole suctions.In order to simplify statement, therefore last suction is also got rid of from Consideration.

Usually, exist the dullness of smoke from cigarette value to increase between the suction.In order to describe the inhomogeneities of smoke from cigarette value between the suction, calculate second from the bottom the suction of cigarette and the ratio of the condensate that does not contain nicotine (" tar ") between the suction second time.This ratio is listed in table 2.This ratio is high more, and what the smoke from cigarette value increased between the suction is strong more, and the suction streams spirogram is more unbalanced.

Table 2: the inhomogeneities of smoke from cigarette value

* * comparable value be used for having at the cigarette paper of boring a hole on the whole surface and have second from the bottom time of cigarette of the air permeability that table 1 provides with aspirate for the second time between the ratio of tar.

All samples shows the inhomogeneity improvement of suction streams spirogram, has wherein typically realized the minimizing of effective tar ratio of approximate 5% to 20%.

Example 2: sample A and B

At first; It is thus clear that in minimizing near the concentrated permission air permeability of the perforation in the filter-tip discrete areas; Because punched areas is arranged in following zone at present, in this zone, during the smoking around the difference between the interior pressure of air pressure and plume be higher than zone near red-hot awl.The air permeability that on the length of paper at 60mm of the enterprising eleven punch 11 in whole surface, has 50CU, and sample A is only in 1/10th of this length, the i.e. enterprising eleven punch 11 of the length of 6mm.Will anticipate that get into cigarette in order to make identical air-flow, air permeability needs 10 times high, that is to say 500CU.Surprisingly, be enough to realize identical smoke from cigarette value it is thus clear that be merely 160CU.About the uniformity of suction streams spirogram, the improvement of the tar rate of realization from 1.42 to 1.23 approximate 13%.

When higher air permeability (sample B), it is more obvious that this effect becomes.In the case, same, substitute nominal value 200 * 60/6=2000CU, the air permeability of 650CU is enough.

Example 3: sample C-F

If cigarette paper is bored a hole two discrete areas rather than in a discrete areas, though then utilize lower air permeability also can realize can with the comparable smoke from cigarette value of the cigarette with cigarette paper of enterprising eleven punch 11 on whole surface.This is conspicuous, and this is because the perforated table area is that twice is big with being merely that a punched areas compares at present.In theory, it is one medium-sized that the air permeability of sample C can be selected as, and that is to say 80CU.Yet therefore second punched areas be arranged in no longer so high zone of pressure reduction further from suction nozzle.And this second punched areas is exhausted during smoking process.Its role is therefore littler, thereby two zones of sample C need utilize 120CU to bore a hole, with obtain can with the comparable smoke from cigarette value of those smoke from cigarette values of the cigarette of the paper of the 50CU of enterprising eleven punch 11 on whole surface.These Considerations correspondingly are applicable to the higher air permeability of sample D, E and F.

About the ratio of tar value, visible obtain approximate 10% to 20% obvious improvement with boring a hole on whole surface to compare, although this improvement is not so good as through only there being a punched areas so obvious.

Because lower air permeability can be implemented perforation with the speed of lower power and Geng Gao, therefore, this advantage is improved with the inhomogeneity minimizing of suction streams spirogram and is compared and must stress.

Example 4: sample A, G and H

Sample A, G and H just punched areas apart from the forward edge of tipping paper apart from aspect different.For sample A, this distance is 1mm, and for sample G, this distance is 3mm, and at last for sample H, this distance is 5mm.Find, compare, realized the inhomogeneity improvement of suction streams spirogram, but this improved degree descends when first punched areas is too far away apart from the forward edge of tipping paper fast with the paper of enterprising eleven punch 11 on whole surface.When more specifically, this improvement is from 3mm 13% to approximate 8% drop to 5mm apart from the time be merely 5%.Therefore, preferably keep this distance at least less than 10mm and preferably less than 5mm.

Example 5: sample A, J, K, N and B

Sample A, J, K and N are at first different aspect the width of punched areas.Air permeability also correspondingly is conditioned, to obtain comparable smoke from cigarette value.Sample A with 6mm width has 160CU, and the sample J with 7mm width has approximate 140CU, and the sample K with 9mm width only has 110CU, and the sample N with 20mm width only has 80CU at last.

Can realize the improvement of the uniformity from 7% to 14% of suction streams spirogram.The influence of this display width is quite little.Can suppose that if will realize improving, punched areas also can have the width greater than 20mm.Based on these data, the Breadth Maximum of punched areas will be selected to and be approximately 25mm.

Minimum widith is limited by maximum air permeability, and this maximum air permeability can be realized in narrow and small zone under the situation of the tensile strength that can too much not weaken paper by perforating apparatus.Consideration has the sample B of 650CU as starting point on the 6mm width, nominally the wide zone of the 2mm 1950CU that must bore a hole then, to obtain identical result.This has been the very high air permeability that is difficult to realize in than the zonule this, and just why the width of punched areas will be at 2mm between the 25mm for this, preferably at 4mm between the 12mm, more preferably at 5mm to the reason between the 9mm.

Example 6: sample A, E, L and M

At last, sample L shows that with M the air permeability of two punched areas needn't be identical.Based on previous result, be favourable as if to more boring a hole more thick and fast near the zone of suction nozzle.For sample L and M, the air permeability of first area be second area air permeability approximate 150%.

When approximate 13% (sample L), the improvement that the ratio of tar value is realized can with have per sample the paper of the punched areas of A and compare.

Yet; Visible during like the more high-air-permeability in sample E and M; At-11.6% o'clock, in two zones, use identical perforation level (sample E, 370CU) poorer result to be provided than paper through the unequal perforation of sample M (410CU/270CU) that changes according to tar ratio with-15%.

In a word, can suppose that it is disadvantageous being bored a hole than first zone more thick and fast in second zone according to these results.As long as technical facility and can agreeing with the smoke from cigarette value then manages to be bored a hole not too thick and fast in second zone.

Similarly,, watch to red-hot awl from suction nozzle for a plurality of punched areas, each zone should be than it the former to bore a hole not too thick and fast be correct.

In addition, there is not reason why different in width to be provided to each zone.Equally, the position of punched areas can also change.

Generally speaking, the many further modification of this invention is conceivable, and each example is not intended to limit in this illustration principle of the present invention only.

Claims

1. a cigarette paper (1); This cigarette paper provides the self-gravitation characteristic to the cigarette by this cigarette paper manufacturing, and wherein said cigarette paper comprises at least one discrete areas (2), it is characterized in that; This zone is perforated, and the air permeability that has is greater than the air permeability outside the punched areas.

2. the air permeability in the cigarette paper as claimed in claim 1, wherein said punched areas (2) is constant on whole punched areas.

3. according to claim 1 or claim 2 cigarette paper, the air permeability in the wherein said punched areas (2) is from 50CU to 2000CU, preferably from 100CU to 1000CU.

4. like each described cigarette paper in the claim 1 to 3, the width of wherein said punched areas (2) at 2mm between the 25mm, preferably at 4mm between the 12mm, and more preferably at 5mm between the 9mm.

5. like each described cigarette paper in the aforementioned claim; Further comprise short side A; This weak point side A is intended in the face of the filter tip (6) in the cigarette of processing; Wherein said punched areas (2) be positioned at contiguous said short side A cigarette paper length 1/3rd, be preferably placed at contiguous said short side A cigarette paper length 1/4th in, and more preferably be positioned at contiguous said short side A cigarette paper length 1/5th.

6. like each described cigarette paper in the aforementioned claim; Further comprise short side A; This weak point side A is intended in the face of the filter tip (6) in the cigarette of processing, and wherein the average air permeability in 1/2nd or 1/3rd of the length of the cigarette paper of contiguous short side A is greater than the average air permeability of the remainder of said cigarette paper.

7. like each described cigarette paper in the aforementioned claim, comprise at least the second discrete areas (3), this second discrete areas (3) is perforated, and separates with first punched areas (2) through unperforated annular region.

8. cigarette paper as claimed in claim 7, wherein second punched areas (3) is than the said further away from each other short side A of said first punched areas.

9. like claim 7 or 8 described cigarette paper, the air permeability in wherein said second punched areas (3) is lower than the air permeability in said first punched areas (2).

10. like each described cigarette paper in the claim 7 to 9; Comprise at least one other discrete areas (4); This other discrete areas (4) is perforated, and separates with said first punched areas (2) and with said second punched areas (3) through at least one unperforated annular region.

11. cigarette paper as claimed in claim 10, wherein said other punched areas (4) is than said first punched areas (2) and the said further away from each other short side A of said second punched areas (3).

12. like claim 10 or 11 described cigarette paper, the wherein said other interior air permeability of punched areas (4) is lower than the air permeability in said first punched areas (2) and said second punched areas (3).

13. like each described cigarette paper in the aforementioned claim, wherein the air permeability outside the punched areas is less than 15CU, preferably less than 10CU.

14. as each described cigarette paper in the aforementioned claim, have less than 0.35cm/s, preferably less than 0.25cm/s, and be more preferably less than the average CO of 0.20cm/s ₂Diffusivity.

15. cigarette; Comprise like each described cigarette paper (1) in the claim 1 to 14; And further comprising filter tip (6) and tipping paper (5), the distance between wherein said tipping paper (5) and said first punched areas (2) is less than 10mm, preferably less than 5mm.

16. one kind is used for producing the method like each described cigarette paper of claim 1 to 14, comprises through static perforation, laser beam perforation and/or machine drilling to form the perforation step of at least one punched areas.

17. method as claimed in claim 16, wherein said perforation step on the cigarette machine or with equipment that said cigarette machine separates on implement.

18. one kind preferably through being used for producing the purposes like the paper of each described cigarette paper of claim 1 to 14 like each described method in the claim 15 and 16, wherein said paper is provided as has the form of 0.3m to 5m or 9mm to the paper web of the width of 35mm.

19. purposes that is used to produce cigarette as claimed in claim 15 like the described cigarette paper of claim 1 to 14.