CN101820782A

CN101820782A - Smoking article with novel wrappe

Info

Publication number: CN101820782A
Application number: CN200880017257A
Authority: CN
Inventors: 李平; M·E·帕里什; P·J·利波维茨
Original assignee: Philip Morris Products SA
Current assignee: Philip Morris Products SA
Priority date: 2007-05-24
Filing date: 2008-05-22
Publication date: 2010-09-01
Anticipated expiration: 2028-05-22
Also published as: MY154478A; AU2008259426A1; MX2009012621A; WO2008149241A3; UA96044C2; AU2008259426B2; IL201478A0; BRPI0812305A2; RU2009148045A; RU152777U1; ZA200907013B; UA96336C2; TWI495434B; JP2013230165A; IL201478A; KR20100021629A; EP2150139A2; EP2617301A1; ZA200907166B; CN101820782B

Abstract

A smoking article 20 has a pattern 34a, 34b, 34c, 34d, 36d' of permeability reducing film forming compound applied to the wrapping paper 24. The pattern is configured so that when a smoking article is placed on a substrate, at least two longitudinal locations along the length of the tobacco rod have film forming compound located only on sides of the smoking article not in contact with the substrate. At these longitudinal locations, the restricted airflow to the tobacco due to the presence of the substrate, in combination with the film-forming compound located at the sides is sufficient to cause the smoking article to self-extinguish. However, when the smoking article is held by a smoker, the presence of the film-forming compound does not by itself cause the smoking article to extinguish. A desirable self burn capability is therefore maintained.

Description

The smoking article that has novel wrappe

Technical field

Generally, the present invention relates to a kind of smoking article; More especially, the present invention relates to a kind of smoking article with pattern, described pattern setting is used for being left on the ignition tendency that reduces the described smoking article that is just firing when nobody notes on the pad holder thing when the smoking article that is just firing on wrapping paper (wrapper).

Summary of the invention

A kind of smoking article comprises the tobacco rod that has wrapping paper, and described wrapping paper is formed by the base web with nominal permeability.Preferably, according to comprising a plurality of patterns along the longitudinally-spaced circumferential interval region of described tobacco rod, (zones of add-on material) is applied on the described base web with zones of add-on material.Each zone preferably includes at least two basic relative zones of add-on material, and the air permeability that they have is lower than nominal permeability.Preferably, zones of add-on material has enough sizes, shape and additional materials concentration, thereby makes that described tobacco rod will be tending towards extinguishing at the respective regions place when described tobacco rod is glowing and be positioned on the pad holder thing.For (consecutive) in succession each first, second and the 3rd zone, the district in the described second area is all with respect to the district's circumferential offset in the described first area.In addition, the district in described the 3rd zone is all with respect to the district's circumferential offset in described first area and the described second area.

Preferably, described pattern extends continuously along described tobacco rod substantially, thereby makes and to be placed on that pad holds in the palm on the thing and when an end is observed, at least one regional position will make its zones of add-on material be positioned at the sidepiece of described tobacco rod substantially when described tobacco rod.

Preferably, described smoking article present be not more than about 25% ignition tendency and be not more than 50% put out value certainly.

Preferably, comprise the wrapping paper with pattern according to smoking article of the present invention, described pattern is formed by the film forming mixture (compound) that reduces air permeability.Described pattern is chosen to make when described smoking article is placed on the pad holder thing, smoking article will put out when arriving at one or more lengthwise positions place certainly at the burning line (advancing burn line) that advances, at described lengthwise position place, have the film forming mixture in the side that does not contact of described smoking article with described pad holder thing; But when described smoking article is held by the smoker, these sides with film forming mixture or film forming agent will can not make described smoking article from putting out.Thus, can select following pattern: described pattern is considered by the side that contacts with described pad holder thing of described smoking article or sidepiece blocking-up air stream.By doing like that, described smoking article not only can have the ignition tendency of reduction but also can have gratifying free combustion quality.

Smoking article has circle or near circular cross section, this is hinting: for example staying unmannedly when noting when smoking article drops on the surface or when described smoking article, the either side of described smoking article or arbitrary sidepiece are reliably put filling up and are held in the palm on the thing.In this respect, when described smoking article contacted with described pad holder deposits yields, no matter how directed smoking article is, pattern described herein all defined side or the sidepiece with the film forming mixture that does not contact with described pad holder thing.Described smoking article also can have non-circular cross sections.

Wrapping paper and zones of add-on material thereof can comprise a plurality of discrete shapes, and the length of each shape extend through is shorter than the length of tobacco rod.Along tobacco rod each position in a plurality of longitudinally-spaced positions, only having first shape and second shape of described pattern substantially in the vertical cross section of cutting open with the longitudinal axis of described tobacco rod.Such position, described first shape only is arranged on first side of described smoking article, and described second shape only is arranged on second side relative with described first side of described smoking article.Described first shape and described second kind of shape can be spaced apart with 180 ° substantially, and the porosity that has is significantly less than the porosity of base web.If desired, described a plurality of discrete shape can be arranged so that the transversal plane that runs through described tobacco rod intersects with at least two this discrete shapes.

Description of drawings

For the ordinary skill in the art, when reading this specification in conjunction with the accompanying drawings, many purposes of the present invention and advantage will become cheer and bright, and identical in the accompanying drawings Reference numeral is applicable to identical parts, and in the accompanying drawings:

Fig. 1 is the perspective view according to the smoking article of first embodiment of the invention.

Fig. 2 is the amplification view of the deploying portion of the wrapping paper that adopts in the smoking article structure of Fig. 1.

Fig. 3 is the amplification view of smoking article with wrapping paper, and second kind of quadrangle patterns is shown.

Fig. 4 is the amplification view of smoking article with wrapping paper, and the third quadrangle patterns is shown.

Fig. 5 is the amplification view of smoking article with wrapping paper, and the 4th kind of quadrangle patterns is shown.

Fig. 6 is the amplification view of smoking article with wrapping paper, and triangle pattern is shown.

Fig. 7 is the side view of smoking article that adopts the wrapping paper of Fig. 3, and wherein smoking article is positioned on the pad holder thing and is oriented such that the first sidepiece contact mat holder thing of smoking article.

Fig. 8 is the side view of smoking article that adopts the wrapping paper of Fig. 3, and wherein smoking article is positioned on the pad holder thing and is oriented such that the second sidepiece contact mat holder thing of smoking article.

Fig. 9 is the side view of smoking article that adopts the wrapping paper of Fig. 3, and wherein smoking article is positioned on the pad holder thing and is oriented such that the 3rd sidepiece contact mat holder thing of smoking article.

Figure 10 is the cutaway view of the smoking article cut open along the 10-10 line of Fig. 7.

Figure 11 is the cutaway view of the smoking article cut open along the 11-11 line of Fig. 7.

Figure 12 is the cutaway view of the smoking article cut open along the 12-12 line of Fig. 7.

Figure 13 is the amplification view that is in the smoking article on the pad holder thing, and the air-flow facing to the coal that glows is shown.

Figure 14 is the amplification view from the smoking article that takes off at pad holder thing, and the air-flow facing to the coal that glows is shown.

The specific embodiment

According to this specification, the smoking article 20 (referring to Fig. 1) of first embodiment comprises tobacco rod 22.Tobacco rod 22 can comprise the muscle tobacco leaf and be surrounded by wrapping paper 24.One end of smoking article 20 can comprise the suitable filter tip 26 that is surrounded by suitable filter tip tipping paper 27.On the length of smoking article, smoking article 20 typically can have circular cross section substantially.Yet other shape of cross section (for example comprising avette) will fall within the scope of this specification.Tobacco rod 22 has nominal length L, and the edge of nominal length L along the longitudinal axis A of smoking article 20 from tipping paper 27 to the free end of tobacco rod 22 records.For instance, this nominal length can be in about 60mm to the scope of about 100mm.

Wrapping paper 24 comprises the base web that typically air is seen through.The air permeability of wrapping paper typically comes mark with Coresta unit.Coresta unit is (to be cm by per unit area down according to per unit pressure drop (being cm water) ²) volume flow rate (be cm ³/ second) measure the air permeability of paper.The base web of conventional wrappers also has known basic weight, and basic weight with every square metre of how many grams (being abbreviated as " gsm ") is measured.Air permeability and the basic weight such as the following table of the base web of the typical smoking article paper that adopts usually in the industry.

Air permeability (Coresta unit) basic weight (gsm)

24 25

33 25

46 25

60 26

At this specification, the base web 24 of wrapping paper preferably has the air permeability at least about 20Coresta unit.Most preferably, wrapping paper has the air permeability greater than about 30Coresta, for example has the common base web of nominal permeability about 33 and about 46Coresta and the about 25gsm of basic weight.Use at some, base web can have the air permeability greater than about 60Coresta, perhaps greater than about 80Coresta or even higher air permeability value.

Refer again to Fig. 2, wrapping paper also is included in along the paired zones of add-on material at a plurality of interval locations place of the tobacco rod 22 of Fig. 1 (for example relative a pair of

district

34d, 36d).

Each defines circumferential zones 31 (for example regional 31a) to rectangle region (for example 34a and 36a, the latter is invisible in Fig. 1).Adding banded zone 31a " width " measures from the leading edge 7 (it is the coal of close convergence) of regional 31a to trailing edge 9 (its from the coal of convergence farthest).Preferably, the width in zone (for example 31a) is in about 5.5mm to the scope of about 12mm, more preferably is in about 7mm to the scope of about 10mm, and most preferably is in about 8mm to the scope of about 9mm.In addition, at each circumferential zones place (for example regional 31a), district 34a and district 36a are partitioned into circumferentially that the opposite side along wrapping paper 24 is provided with relation respect to one another when making them on being formed at tobacco rod 22.Preferably, each distinguish 34a, 36a the about 5mm of cross measure size (cross-measure) (being the cross measure size of relative paper web) to the scope of about 9mm along circumferentially extending, more preferably in the about 6mm of cross measure size circumferential extension in edge to the scope of about 7mm.

By convention, what note is, when this paper illustrates the size of various embodiment, " width " will be along the longitudinal extension of tobacco rod, but the yardstick that makes progress in week will be represented with " laterally (transverse) " or " transverse direction (cross-direction) " or " cross measure size (cross-measure) ".

What also note is, base web between

adjacent area

31a and 31b area (area) 33 and the relative district in each zone between the area (areas) of (for example between the

relative district

34b and 36b of regional 31b) preferably do not contain substantially and constitute the additional materials of distinguishing (for example distinguishing 34b, 36b).

Fore-and-aft distance at (for example between regional 31a and 31b) between the adjacent area is called band interval 33, and band 33 is preferably about 4mm to about 12mm at interval, and more preferably is that about 6mm is to about 8mm.

Preferably, corresponding relative district 34,36 in each zone 31 is offset to a certain degree (according to instruction subsequently) with respect to those the relative districts in front row or the forefoot area, and form the zone 31 (banded zone width and banded zone interval width that each is selected) of sufficient amount along given tobacco rod, thereby when smoking article is placed on the pad holder thing, exist at least one position 101 along tobacco rod 22, at at least one 101 place, position, Ying Dui district 34 (for example a pair of relative district 34b, the 36b among Fig. 1) is substantially along side orientation of tobacco rod 22 mutually.Be exactly near tobacco rod 22 this part (position 101) or this part, put out most possible generation certainly.Hereinafter, the immediate position along tobacco rod 22 of this orientation is called " orientation is extinguished zone (oriented snuffer region) 101 ".

Because smoking article 26 may be placed on different pad holder thing shown in Figure 1 on and/or because the pattern in its district may be different, so recognize, at the different rotary position of tobacco rod 22, orientation is extinguished zone 101 may appear at different lengthwise position places along tobacco rod 22.The pattern in district and band interval 33 may be selected to and make that can produce a plurality of orientations along tobacco rod 22 extinguishes zone 101.

Preferably, each is distinguished 34,36,36 ' includes enough additional materials, so that the air permeability of wrapping paper at each place, district is reduced to 0.0Coresta to about 10Coresta, and about 7Coresta or lower extremely more preferably.

At this specification, the pattern of additional materials is applied on the wrapping paper 24, with the ignition proclivity characteristics that is improved and also be improved put out characteristic certainly.Ignition tendency is that it is incorporated herein by reference in full at this according to the described standard testing of carrying out of ASTM E2187-04 " Standard Test Method for Measuring the IgnitionStrength of Smoking articles " (" measuring the standard method of test that smoking article is lighted intensity ").Ignition tendency has been measured smoking article will produce the possibility that enough heat keeps tobacco rod 22 static combustion on being positioned over pad holder thing the time.The low value ignition tendency meets the requirements, and will cause that the minimizing of the possibility of burning takes place following pad holder thing because this value is related to the smoking article that glows.

What putting out certainly here related to is the smoldering feature of smoking article under the free combustion condition.In order to assess from putting out, the chamber of experimentizing is tested under the relative humidity of 23 ℃ ± 3 ℃ temperature and 55% ± 5%, and described temperature and relative humidity should be monitored by the record hygrothermograph.Enclosure is discharged the combustion product that forms in the test process.Before test, smoking article to be tested was placed 24 hours under the condition of the relative humidity of 23 ℃ ± 3 ℃ temperature and 55% ± 5%.Just before test, smoking article is placed in the glass beaker, freely enters to guarantee air.

Carry out in encapsulation box or test box from putting out test.Single port smoking machine (single portsmoking machine) or electric lighter are used to light the smoking article of test usefulness.In test process, a device or " angle retainer " are by keeping an end to keep described smoking article to be tested with 0 ° (level), 45 ° and/or 90 ° of (vertically) angles.Preferably, respectively test 20 (20) smoking articles 0 °, 45 ° and 90 ° of positions.If adopt more than a device, then described device is located such that preferably described smoking article deviates from each other mutually to avoid intersecting interference.If smoking article extinguished before the frontal line of the coal that glows arrives at tipping paper, result queue is " putting out certainly " so; On the other hand, if smoking article continues to glow when the frontal line of the coal that glows arrives at described tipping paper, result queue is " not extinguishing " so.Thus, for example, 95% put out value representation 95% the presenting from putting out of tested smoking article under the free combustion condition certainly; And 20% put out value representation only 20% the presenting from putting out of tested smoking article under this free combustion condition certainly.

Can represent that from putting out value respectively value refers to and put out value certainly under the demarcation test angle according to " 0 ° down from put out value ", " 45 ° down from putting out value " or " 90 ° are put out value down certainly ".In addition, also can " put out mean value certainly " and represent from putting out value, described mean value when putting out mean value and refer in described three angle positions, i.e. (i) " 0 ° down from putting out value ", (ii) " 45 ° down from putting out value " and the mean value that (iii) " puts out value under 90 ° certainly ".When mentioning " putting out value certainly ", do not distinguish 0 ° and down put out value or put out value mean value certainly certainly from putting out under the value, 90 ° down, but can refer to any one value in them from putting out value, 45 °.

As used herein wording " under the free combustion condition from putting out " or refer under the situation that the cigarette glowed be not sucked " putting out certainly under the free combustion condition " and to be in extinguishing of following time of free combustion condition.

Understand as present, allow smoking article 20 (referring to Fig. 1) is designed to have low ignition tendency value and low from the useful combination of putting out value according to the staggered zones of add-on material of this specification.The pattern that is made of the zones of add-on material of hanging down air permeability provides film forming mixture area (areas of film-forming compound) along tobacco rod 22 length, when smoking article is placed on the pad holder thing, the smoking article 20 that film forming mixture area can ask thing to match and light to extinguish with this pad; But when smoking article 20 was held by the smoker under the free combustion condition, these additional materials (for example film forming mixture) area made smoking article 20 lower from the statistics probability that puts out.Thus, according to this specification, be applied on the base web by the pattern 30 with the film forming mixture, smoking article 20 is keeping desirable free combustion quality or the low ignition tendency that can present reduction when putting out value.

For the desirable ignition tendency that obtains smoking article with put out characteristic certainly, preferably, be under the unfolding condition in (for example shown in Figure 2) or pattern 30 (referring to Fig. 2) be applied on the base web 24 of wrapping paper when being rolled onto cigarette paper roll on the bobbin in base web 24 by rip cutting (slit) when base web comprises still not.A purpose of this specification is the wrapping paper that provides following, this wrapping paper when forming tobacco rod 22, present be not more than 25 ignition propensity value and be not more than 50 put out value certainly.Resulting smoking article even more preferably be not more than about 15 ignition propensity value; The most preferred ignition propensity value of resulting smoking article is not more than about 10.The lower value of putting out certainly also is desired.In this respect, preferred from putting out value for less than about 25, and most preferred oneself put out value less than about 10.

Specifically with reference to Fig. 2, overlapping based on the diameter (about 7mm is to about 10mm) and the consideration of finished product smoking article at the material at the longitudinal seam place of about 1mm to 2mm, select the lateral dimension of wrapping paper 24.For example, consider to have the overlapping seam of 1mm, at smoking article with Zhou Changyue 25.6mm, wrapping paper can be about 27mm along the horizontal size of paper web.

Preferably, pattern is applied on the base web, thereby makes and along tobacco rod 22 (a plurality of interval locations place referring to the arrow B among Fig. 2) a plurality of circumferential

elongated area

31a, 31b, 31c, 31d (dotted line by Fig. 2 limits) are being set.Additional materials can be applied on the side or two sides of base web.In the nominal length of tobacco rod 22, preferably generate 3-6 and most preferably generate 4-6 or more zone 31.Each

circumferential zones

31a, 31b, 31c, 31d all have along the longitudinal pitch of tobacco rod 22 (that is, the starting end along tobacco rod from a zone is to the measured length of the starting end of adjacent area), and longitudinal pitch is less than the nominal length of tobacco rod 22.By selecting longitudinal pitch is the about 25% of nominal length, on each tobacco rod 22 four zones will be set.

At least two zones of add-on material (for example 34a, 36a) are set in each circumferential zones (for example 31a).What note is that the zones of add-on material in institute's drawings attached all utilizes strokes and dots to identify, to help to discern them.Yet in the wrapping paper that smoking article or this smoking article are used, these zones of add-on material can be or can not be visually discernible.Each district in these districts preferably circumferentially is partitioned into and makes that these districts will be toward each other in tobacco product strand 22.In addition, for every ternary district, be example with 31a, 31b, 31c, district 34b, the 36b of second regional 31b is preferably with respect to district 34a, the 36a circumferential offset in first zone.In addition, district 34c, the 36c of the 3rd regional 31c be preferably with respect to district 34b, the 36b circumferential offset of second area 31b, and with respect to district 34a, the 36a of first area 31a circumferential offset further.

As shown in Figure 2, in the present embodiment, each regional additional zone is offset a distance with respect to the additional zone of adjacent area in week upwards horizontal (laterally), and this distance is the function of the lateral dimension of additional zone.Each district all has the width that records along tobacco rod 22 and along the cross measure size on the circumferential direction of tobacco rod 22.At this embodiment, distinguish wide (zone width) longitudinal pitch less than the relevant range.As shown in Figure 2, longitudinal pitch length can be wide greater than the respective area of respective regions.Preferably, the additional zone in the zone of continuing of tobacco rod 22 defines the patterns 30 that a plurality of zones constitute thus with respect to the additional zone skew of adjacent area, and described a plurality of zones cover a plurality of parts of base web along the line with respect to the base web edge tilt.In addition, the pattern of additional zone can repeat self at least in part along the length of base web.

In shown embodiment (Fig. 2), each district places on the wrapping paper 24, thereby makes this district be centered on the paths of three paths 34,36 and 38, and described three paths are represented by corresponding dotted line 34,36 and 38.Thus, for example path 34 through the corresponding geometric properties of six

districts

34a, 34b, 34c, 34d, 34e, 34f.Each district separates with other interval; But alternately, the district can contact with each other.Parallel to each other and the side that be oriented with respect to wrapping paper 24 in path 34,36,38 acutangulates φ.Should be appreciated that the identical and development by pattern shown in Figure 2 in district 36 ' preferably and district 36 obtains, wherein, when district 34 when a limit disappears, district 34 ' occur along the relative edge.Each to (for example distinguish 34a, 36a or

district

34b, 36b) along the district of paper web lateral alignment and can cover

respective regions

31a, 31b up to about 33% total surface area.For rectangle region, preferably, each district is in about 8mm and is being in about 5mm extremely in the scope of about 7mm to the scope of about 10mm and on circumferential cross measure direction on vertical or width.Longitudinal separation 33 between the district preferably is in 4mm to the scope of about 12mm, and more preferably is in about 6mm to the scope of about 8mm.The circumferential interval of zones of add-on material preferably is in about 3mm to the scope of about 20mm, more preferably is in about 5mm to the scope of about 8mm, and most preferably is in about 5.5mm to the scope of about 7.0mm.

When wrapping paper 24 is shaped when making tobacco rod 22 around tobacco, at the zones of add-on material at arbitrary lengthwise position place about 180 degree of each interval preferably.In addition, the ratio of zones of add-on material area occupied and the gross area (this is than being defined herein as " district's area than ") is significantly less than 1, and the described gross area is (i) respective regions 31d and the (ii) annulus area sum between the adjacent area on the side.Preferably, this district's area is than being in less than about 20% to less than in about 50% the scope, and more preferably is in approximately less than about 20% to less than in about 35% the scope.More particularly, in certain embodiments, the district's area ratio between the district's occupied area and the gross area can be less than 30% even less than 25%.Generally speaking, it is desirable keeping district's area coverage low, because when wrapping paper uses for tobacco rod, think that high value (for example more near 1) increases the carbonomonoxide concentration in the main flume at low air permeability (promptly low Coresta).

When tobacco rod 22 is made in wrapping paper 24 shapings, path 34,36,36 ' described article one spiral path 36/36 ' (district 36 and 36 among Fig. 2 ' combination to form spiral path 36/36 '), and second spiral path 34 (district 34 that comprises the spiral alignment), article two, spiral path all extends in the vertical and on the whole length of tobacco rod 22 around axis A, and is extremely shown in Figure 9 as Fig. 7.Spiral path 36/36 ' and 34 (as shown in Figure 2) have helical angle φ and mutually disjoint.Preferably, two spiral paths can rotate in the counterclockwise direction or are rotated in a clockwise direction around tobacco rod 22.As shown in the figure, when from lighting end when filter end is observed, two paths 34,36 ' move ahead along clockwise path from the filter end of tobacco rod 22.

By one or more layers of aqueous film-forming compositions (aqueous film-formingcomposition) is executed on the base web that is distributed in wrapping paper, can form a plurality of districts of pattern 30, to be reduced in the air permeability of the paper in these districts.Alternately, fibrous material also can be used for forming a plurality of districts.When using film-forming composition, this film-forming composition preferably can comprise water and high concentration (for example on the weight 20% to about 50%) plugging agent.Film forming mixture (film-formingcompound) can comprise one or more plugging agent (for example starch, alginate, cellulose or natural gum), but also can comprise the calcium carbonate as filler.When starch was the film forming mixture, about 24% concentration can be useful.Adopt intaglio printing, digital printed, utilize any suitable technique of form lining or spraying or other, film-forming composition can be applied on the base web of wrapping paper 24.For example, the method that can select among the U.S. Patent application US 11/500,918 the film forming mixture of describing and be used to execute cloth film forming mixture prints the images to the base web of wrapping paper, and this U.S. Patent application is incorporated herein by reference in full at this.If desired, zones of add-on material can by print a plurality of continue the layer (for example two or more aligned with each other or the alignment continue the layer) form.In addition, when a plurality of layers were used to form zones of add-on material, the material in a plurality of layers can be identical or different.For example, one deck can be starch, and one deck can be starch and calcium carbonate (vice versa) down.

At the pattern 30 of a plurality of zones of add-on material, presently preferred embodiment is illustrated among Fig. 3.The embodiment of image pattern 2 is the same, and the zones of add-on material among Fig. 3 is a quadrangle, is rectangle especially substantially.Preferably, all execute being furnished with at least two zones of add-on material (for example 40a, 40b) among each regional 31a, 31b, 31c, the 31d, with circumferentially spaced apart in the finished product smoking article.Each circumferential size of distinguishing 40a, 40b preferably is chosen as about 50% less than base web 24 cross measure size upon deployment, and is most preferably about 25% of the cross measure size of this base web 24 or tobacco rod 22 girths.Each circumferential size of distinguishing 40a, 40b add the circumferential interval sum between district 40a, the 40b be preferably base web 24 circumferential cross measure size about 50%.

The longitudinal length of

district

40a, 40b adds that longitudinal separation 33 sums (being longitudinal pitch length) between

district

40a, 40b and district 42a, the 42b preferably are chosen to make and will produce three or four regional 31a, 31b, 31c, 31d and make the additional zone of adjacent area be spaced apart from each other in the vertical on the nominal length of the tobacco rod 22 of smoking article.Preferably, vertical broadening in district (for example 40a, 40b) or " width " (promptly wide or regional wide as previously defined district) are in about 8mm to the scope of about 10mm.District 42a, the 42b of (i) regional 31b and (ii) the circumferential offset x between district 40a, the 40b of regional 31a preferably be in base web 24 the total cross measure size of expansion about 10% to about 35% scope.More preferably, circumferential offset x be in base web 24 the total cross measure size of expansion about 12% to about 35% scope.Most preferably, circumferential offset x is about the circumferential size of

additional zone

40a, 40b or half of cross measure size.Zones of add-on material among other regional 31c, 31d is also similarly with the further relative to each other circumferential offset of identical skew x.What note is that for example, when base web is under the unfolding condition, in regional 31d, the district of zones of add-on material 46a, 46c is separated between two limit portions of base web 24.

The pattern that zone 31a executes cloth to the regional 31d preferably repeats along the length of base web 24.Obviously, if circumferential offset x less than 12.5% of the transverse direction width of base web, then the zone more than four is with the complete cycle or the phase lengths (phaselength) of limiting pattern 30.On the contrary, if circumferential offset x greater than 12.5% of the transverse direction width of base web, then four with the complete Cycle Length (as shown in Figure 2 pattern) of lower area with limiting pattern 30.

The pattern 30 (referring to Fig. 4) of another embodiment adopts quadrangle zones of add-on

material

60a,, 60b, promptly substantially parallel quadrangle form district.Although when wrapping paper is configured as tobacco rod 22,

district

60a, 60b are arranged to each other spiral aligning substantially, and the configuration of parallelogram shape 60,62,64,66 can be selected as required.For example, can adopt the mirror image (round vertical one-tenth mirror image) of shape, even may lose spiral impression substantially.Equally, the gradient in parallelogram district also can change as required.Yet generally speaking, in this embodiment, the circumferential size of district 60,62,64,66 and regional 31a-31d, circumferential interval or skew, longitudinal size and longitudinal separation or skew all can be according to selecting described in other embodiment like that.

The pattern 30 (referring to Fig. 5) of an embodiment has adopted quadrangle zones of add-on material 70,72,74,76 again, promptly basic step sector.At this, once more, when wrapping paper is attached on the tobacco rod 22, cardinal

principle step sector

70a, 72a can be arranged to each other spiral aligning substantially.In addition, the true form of step sector 70,72,74,76 can be selected as required.For example, the ratio of the gradient of step sector and step sector can change as required.Yet generally speaking, in this embodiment, the circumferential size of district 70,72,74,76 and regional 31a-31d, circumferential interval or skew, longitudinal size and longitudinal separation or skew all can be according to selecting described in other embodiment like that.Preferably, front 7 is the long limit in two parallel edges in district 70.

The pattern 30 (referring to Fig. 6) of another embodiment has adopted leg-of-mutton zones of add-on material 80,82,84,86 substantially.Cardinal principle delta 80a, the 80b in zone 31 can construct and be arranged to contact corresponding cardinal principle triangle 82a, the 82b of next adjacent area 31b.If desired ignition tendency and put out characteristic certainly requirement is arranged, then cardinal principle delta 80a, the 80b of first area 31a can be longitudinally-spaced with delta 82a, the 82b of adjacent area 31b.The characteristic that depends on the smoking article designing requirement, it is also conceivable that the cardinal principle delta-shaped region is oriented such that the coal that is burning of the smoking article that glows meets with triangular apex and the dimension in cross-direction that increases gradually of delta (promptly in Fig. 6 from right to left) substantially, perhaps make the glow coal that is burning of smoking article meet with the increasing suddenly of the base of delta and low air permeability district (promptly in Fig. 6 from left to right).Can determine the circumferential interval of delta 80,82,84,86 and the size of these deltas according to other local described preferable range in this specification.In addition, delta can be as shown in the figure isosceles triangle, equilateral triangle, right angled triangle or other desired satisfactory triangular shaped arbitrarily.Yet generally speaking, in this embodiment, the circumferential size of district 80,82,84,86 and regional 31a-31d, circumferential interval or skew, longitudinal size and longitudinal separation or skew all can be according to selecting described in other embodiment like that.Preferably, the district 80 of triangular form is oriented to and make forms front 4 coal of close convergence ().

Three diverse locations that smoking article 20 is seated on the pad holder thing 98 have illustrated the cooperation that is produced between low air permeability zones of add-on material and pad holder thing 98.A position (referring to Fig. 7) shows the side view according to the smoking article 20 of this specification.Make smoking article round its longitudinal axis rotation (seeing along clockwise) miter angle, can obtain view same as shown in Figure 8 from the left end of Fig. 7.Similarly, make another miter angle of smoking article 20 rotations (seeing along clockwise) again, can obtain view shown in Figure 9 from the left end of Fig. 7.In each figure of Fig. 7 to Fig. 9, can see that at least one pair of zones of add-on material is positioned on the side of smoking article in the position along tobacco rod 22 length, for example the

district

92,92 of Fig. 7 ', the

district

94,94 of Fig. 8 ' and the

district

96,96 of Fig. 9 '.In these positions, zones of add-on material is positioned on the side of smoking article 20 (referring to Figure 12) substantially, and district 92,92 ' substantially erects or substantially perpendicular to the surfaces of pad holder thing 98.The district 92,92 ' this orientation be illustrated among Figure 12 best, wherein when in cross section, observing, relative district 92,92 ' be positioned on the corresponding relative side of smoking article 20, and locating substantially symmetrically with respect to tobacco rod 22 with the surperficial substantially parallel diameter of pad holder thing 98.

Figure 10 and Figure 11 show zones of add-on material in the orientation along other lengthwise position place of smoking article 20.In Figure 10, a zones of add-on material 90,90 ' be located such that is distinguished 90 contact mat holder things 98.When the right-hand member of Fig. 7 is observed, the district 94,94 ' also of the smoking article 20 among Fig. 7 can be to locate among Figure 10 like that.In Figure 11, district's 96 ' contact mat holder thing 98, but another relative district 96 is positioned at the top of smoking article 20.Consideration from Fig. 7 to Fig. 9, to recognize, no matter have described zones of add-on material pattern smoking article 20 the angle position how, at least one pair of relative zones of add-on material is according to Figure 10 or shown in Figure 12 locating like that or locating with the position of rotation between those positions.This location is called orientation in the above and extinguishes zone 101.

When smoking article 20 was present under the free combustion condition (referring to Figure 14), the air permeability in district 92,92 ' reduce by their hindered the air stream facing to the coal that is burning of tobacco rod 22.On the contrary, the bottom 104 of wrapping paper freely allows air to enter into the side of tobacco rod 22, to support burning of coal.When smoking article 20 is placed on the pad holder thing 98 (referring to Figure 13), then produced extremely different situations.At this, pad holder thing 98 stops air upwards to flow towards the bottom 90 of tobacco rod 22.District 92,92 ' and fill up and ask thing 98 cooperations to limit much smaller can be used for the area 100,102 of air conveying by base web.More specifically, the vertical area 100 between 92 bottom, district and the pad holder thing 98 and distinguish 92 ' bottom and the vertical area 102 between the pad holder thing 98 make and can be used for making air significantly to reduce by area with the coal that glows that arrives at tobacco rod 22.Owing to lack airborne oxygen, when the burning line arrived at the relative zones of add-on material of location as shown in figure 13, the coal that glows was from putting out.The situation that can be used for supporting the area of the air of coal combustion significantly to reduce also is present in the not position of rotation between position shown in Figure 10 and position shown in Figure 12 of tobacco rod 22 during contact mat holder thing 98 of zones of add-on material, and Figure 12 represents to can be used for to enter the position that the area of air stream at utmost reduces.Similarly, if smoking article is placed on the pad holder thing 98, in the position at this moment, other right zones of add-on material ground has position shown in Figure 13 substantially arbitrarily, then also may take place from putting out at these other right place, district.

Yet, when smoking article is placed on the pad holder thing 98 so that additional zone substantially as shown in figure 11 during contact mat holder thing 98, additional zone limit air fully can be by the area with the arrival base web, and with compare extinguishing the situation that 101 places, district take place, material fit degree between pad holder thing 98 and the additional zone is littler, causes reducing of this area.

In previous examples, just place situation on the pad holder thing 98 with one of three particular orientation (directed with 45 degree separate each other (skew)) with respect to smoking article, the have wrapping paper ignition propensity value, the free combustion quality of putting out value and improvement certainly of reduction of reduction of smoking article 20 of (pattern 30 that has formation on the wrapping paper) has been discussed.Naturally, this discussing mode is for brevity.What will readily appreciate that is, pattern according to this specification can make smoking article extinguish, and no matter this sidepiece seating of smoking article on pad holder thing 98, and does not need to make the film forming mixture to be applied to the degree that degree on the paper reaches the spontaneous firing quality forfeiture of the needs that make in the smoking article.By recognizing that relative film forming mixture district need not to appear at the position that becomes accurate 90 degree from the sidepiece that contacts with pad holder thing 98, this just can be understood.These districts can be more approaching or placed in the middle further from the position of the sidepiece that contact with pad holder thing 98, for example and between the sidepiece of contact mat holder thing 98 spends to 120 into about 60 degree.

In addition, for the pattern of special selection, the ability that smoking article is extinguished may depend on the minimum length scope that additional materials (for example film forming mixture) is set more, rather than at the unit are specified weight of the film forming mixture at lengthwise position place.For example, at the special design of being adopted, base web and film forming mixture, the length of rectangle region can be not less than about 5.5mm.Usually under the situation of not losing the free combustion quality, can increase the amount of the film forming mixture that is adopted, to improve ignition proclivity properties; And if desired, burning-rate accelerator can be applied on the paper, to support even higher additional levels.

Preferably, zones of add-on material makes the air permeability of wrapping paper be reduced to the scope of about 0Coresta to about 10Coresta.

Thought before that 3: 1 air permeabilities between base web and the zones of add-on material, reduced because paper exists inadequate air permeability at the lengthwise position place so that smoking article extinguishes than deficiency.Yet, when the pad holder thing 98 below existing and when additional materials be positioned at smoking article not with side that pad holder thing 98 contacts the time, on its perimeter of smoking article, this air permeability ratio can be enough to smoking article is extinguished.

Therefore, be appreciated that, the spiral position of rotation of relative zones of add-on material has produced following situation, wherein, no matter which sidepiece of wrapping paper is placed on the pad holder thing 98, will exist at least one lengthwise position all the time, this at least one lengthwise position does not have the film forming mixture with pad holder thing 98 contacted sidepiece places, and still have enough additional amount and geometrical condition, so that 98 cooperations of Qu Nengyu pad holder thing, thereby when arriving at this lengthwise position, the burning line make smoking article from putting out.This fact has been improved the ignition proclivity properties of smoking article and has been allowed smoking article is designed to have and has been not more than 25% ignition propensity value.Yet under the situation of not having pad holder thing 98 (for example when smoking article is held by the smoker), smoking article still can not put out certainly but keep free combustion.This has improved the self-extinguishment energy of smoking article, and allow with smoking article be designed to have be not more than 50% put out value certainly, this puts out value certainly can be for putting out mean value certainly.0 degree down put out certainly value comparable oneself to put out mean value much lower, and can be less than 25%.

In the above-described embodiments, smoking article has circular cross section substantially.Thus, arbitrary sidepiece of smoking article all may seating hold in the palm on the thing 98 at pad.Yet, the pattern of this instruction can make no matter which sidepiece of smoking article by chance seating on pad holder thing 98, all can realize above about Figure 13 and the described above-mentioned combustion characteristics of Figure 14 (be not more than 25% ignition propensity value and be not more than 50% put out value certainly).Preferably, when pattern was chosen to make around base web is wrapped in tobacco rod 22, film forming mixture district appeared at the opposite side that does not contact with pad holder thing 98 at the one or more lengthwise position place along tobacco rod 22.Have that to make the film forming mixture more than one be preferred in the lengthwise position of side locations, adapt to following situation so that make: after the burning line has been advanced by the part of smoking article smoking article is placed on the pad holder thing 98, this can make smoking article extinguish; Make that perhaps the zones of add-on material on the side direction is close to the burning line usually relatively when smoking article is placed on the pad holder thing 98.

If desired, except quadrangle, zones of add-on material also can comprise other geometry, for example comprises avette, other polygonal or the like.

In addition, when the size that makes the district is identical with the size maintenance among the shown embodiment, can increase above-mentioned helical angle φ.This variation pattern mode that can overlap is come setting area (perhaps make at least district close to each other).Alternately, by when helical angle is identical with helical angle among Fig. 2, increasing the dimension in cross-direction of district or sheet, perhaps along the path 34,36,36 ' and between each sheet, be placed on the district that equates with district's size shown in Figure 2 (thereby along the path 34 have 12 sheets rather than 6 each sheet), can form the step helix pattern.

When this adopts speech " pact " or " being similar to " etc. at numerical value, be intended to not only comprise this numerical value but also comprise fall into therewith " pact " relevant exact value ± value in 5% deviation or the scope.

Now, those of ordinary skill in the art is clear that this specification has been described a kind of new, useful and non-obvious smoking article.Those of ordinary skill in the art also is clear that, for the various aspects of the smoking article of having described in above-mentioned detail specifications, exists many modifications, distortion, substitutes and equivalent.Correspondingly, spell out, the present invention includes all such modifications, modification, the alternative and equivalent that fall within the spirit and scope of the present invention that claim limited of enclosing at this.

Claims

1. a smoking article comprises the tobacco rod with wrapping paper, the zones of add-on material that described wrapping paper has base web and forms according to certain pattern, and described base web has nominal permeability,

Described pattern comprises a plurality of circumferential zones that are positioned at a plurality of interval locations place along described tobacco rod, each described zone has at least two zones of add-on material, the air permeability of described at least two zones of add-on material is lower than described nominal permeability, and described at least two districts substantially toward each other; And at least each in succession first, second and the 3rd the zone for, the district of each second area is with respect to district's circumferential offset of corresponding first area, and the district in the 3rd zone with respect to the district of corresponding first area than the further circumferential offset in the district of corresponding second area;

Described pattern fully continuously extends so that make along described tobacco rod and described tobacco rod is being placed on the pad holder thing and when an end is observed, the orientation at least one zone will make described at least one regional respective area be positioned at the sidepiece place along described tobacco rod; And

Described district has enough sizes, shape and additional materials, thereby makes that described tobacco rod will be tending towards extinguishing in described at least one location under described orientation when placing on the pad holder thing under described tobacco rod is glowing condition.

2. according to the described smoking article of claim 1, wherein, described pattern comprises other zone; And compare with district in the zone that was right after before described other zone, the district in each described other zone is more with respect to district's circumferential offset of described first area.

3. a smoking article comprises tobacco rod, described tobacco rod have be not more than about 25% ignition tendency, be not more than about 50% put out value, nominal length and wrapping paper certainly, described wrapping paper has:

Base web has nominal permeability; And

Extend along the nominal length of described tobacco rod in a plurality of zones, and each zone has at least two air permeabilities zones of add-on material lower than nominal permeability, described at least two districts substantially toward each other, each zone is with respect to the adjacent area lateral shift.

4. according to the described smoking article of claim 3, wherein, described ignition tendency is not more than about 15%.

5. according to claim 3 or 4 described smoking articles, wherein, described zones of add-on material is the cardinal principle quadrangle.

6. according to claim 3 or 4 described smoking articles, wherein, described zone has the longitudinal pitch length along described tobacco rod, and the district that described zones of add-on material has is wide less than described longitudinal pitch length.

7. according to claim 3 or 4 described smoking articles, wherein, described base web has the air permeability greater than about 20Coresta.

8. according to claim 3 or 4 described smoking articles, wherein, described additional materials is present on the side of described base web.

9. according to claim 3 or 4 described smoking articles, wherein, described additional materials is present on two sides of described base web.

10. according to claim 3 or 4 described smoking articles, wherein, described zones of add-on material is executed cloth by printing.

11. according to claim 3 or 4 described smoking articles, wherein, described zones of add-on material is by executing cloth by the layer printing that continues.

12. according to claim 3 or 4 described smoking articles, wherein, each zone comprises at least two round the circumferential isolated additional zone of described tobacco rod.

13. according to the described smoking article of claim 12, wherein, each additional zone comprises the starch mixture layer.

14. according to claim 3 or 4 described smoking articles, wherein, each zone is corresponding with the lateral dimension of described additional zone with respect to the distance of adjacent area lateral shift.

15. according to claim 3 or 4 described smoking articles, wherein, each zone is with respect to the adjacent area lateral shift, to limit the spiral sequence along base web of zones of add-on material.

16. a smoking article comprises:

Tobacco rod has the longitudinal axis and length;

Wrapping paper surrounds described tobacco rod; And

The pattern of film forming mixture is arranged on the described paper and a plurality of discrete shapes is provided, and each shape is only extended on the part of described length,

Wherein, in each position in a plurality of lengthwise positions of described smoking article, only first and second discrete shapes with perpendicular to the Plane intersects of the described longitudinal axis, and wherein, described first shape only is arranged on first side of smoking article, and second shape only is arranged on second side relative with first side of described smoking article.

17. according to the described smoking article of claim 16, wherein, each position in described a plurality of lengthwise positions, the 3rd side does not all have the film forming mixture substantially with the 4th side relative with described the 3rd side and described second shape and described first shape is kept apart.

18. a smoking article comprises:

Tobacco rod has the longitudinal axis and length;

Wrapping paper surrounds described tobacco rod; And

First pattern and second pattern are arranged on the described paper, the zone that provides only air permeability to reduce for described paper, and on the length of smoking article, advance along corresponding nonoverlapping first spiral path and second spiral path,

Wherein, in each position in a plurality of lengthwise positions of the length of smoking article, the part of described first pattern only is positioned at first side of described smoking article, and the part of described second pattern only is positioned on the second relative side of described smoking article.