JP5676098B2 - Slit striped paper - Google Patents

Description

US Pat. No. 5,997,691 US Pat. No. 6,596,125 US Provisional Patent Application No. 60 / 707,964 “Standard Test Method for Measuring Cigarette Ignition Strength” of “American Society for Testing Materials (ASTM) Standard E2187-04”

  In a first embodiment, provided is a wrapping paper for a smoking article that includes a base web and at least one laterally striped region that includes first, second, and third bands. The first and third bands include an additional material that reduces the transmittance of the wrapping paper. The first and third strips are each statistically significant under natural combustion conditions if either the first or third strip is added separately to the wrapping paper of the smoking article. It shows the occurrence of complete burnout and has a width such that the occurrence of self-extinguishing is statistically little or none. The sum of the widths of the first and third bands is, under natural combustion conditions, if the bands are added as a single continuous band (without slits or other discontinuities) to the wrapping paper of the smoking article. It is such that smoking articles statistically show little or no occurrence of complete burnout, and show a statistically significant occurrence of self-extinguishing. The first and third bands are separated by the second band. The wrapping paper has a greater transmission along the second band than along the first and third bands. The second band is compared to a smoking article where the ignition smoking article including the first, second, and third bands includes wrapping paper on which the first and third bands are added as a single continuous band. The width of either of the first and third bands so as to show the occurrence of statistically reduced self-extinguishing under natural combustion conditions, while maintaining the occurrence of complete burnout statistically little or no Also have a width less than or equal to.

In a second embodiment, provided is a wrapping paper for a smoking article that includes a base web and a laterally striped region of additive material. The laterally striped area is sufficient to extinguish a smoking article that includes the laterally striped area when left on the substrate. The wrapping paper further comprises at least one air permeable intermediate strip along the laterally striped region so that the occurrence of self-extinguishing of the smoking article including the wrapping paper is statistically reduced over that without the intermediate strip. Including.
In a third embodiment, provided is a wrapping paper for a smoking article comprising a base web and at least one laterally striped region comprising first, second, and third bands on the base web. is there. At least one laterally striped region is free of filler. The first and third bands are outside the second band, and the second band has a greater transmittance compared to the first and third bands.

In a fourth embodiment, provided is a wrapping paper for a smoking article comprising a base web and at least one laterally striped region comprising first, second, and third bands on the base web. is there. The first and third bands are outside the second band, the second band has a greater transmittance compared to the first and third bands, and the second and first bands The third band includes an additional material.
In a fifth embodiment, providing includes providing a base web and forming at least one laterally striped region including first, second, and third bands on the base web; Is a method for producing a striped wrapping paper for a smoking article. The first and third bands are outside the second band, the second band has a greater transmittance compared to the first and third bands, and at least the first and third bands The strip is formed of an additive material without a filler, and optionally at least one of the strips is at least partially formed of an additive material that includes a filler.

  In a sixth embodiment, providing includes providing a base web and forming at least one laterally striped region including first, second, and third bands on the base web; Is a method for producing a striped wrapping paper for a smoking article. The first and third bands are outside the second band, the second band has a greater transmittance compared to the first and third bands, and the second and first bands And the third band is formed of an additional material.

  Preferably, the smoking article extinguishes fire when placed on the substrate, and such a tendency is referred to herein as having a “low ignition tendency”. Ideally, a low tendency smoking article will continue to burn when placed naturally, for example, in an ashtray holder, or when held by hand without smoke (free combustion). Many conventional cigarette designs that achieve low ignition tendency requirements exhibit a high rate of self-extinguishing under natural combustion conditions.

  As used herein, the phrase “complete burnout” refers to the American Society for Testing and Materials (ASTM), which provides a measure of the ability of an ignited striped cigarette placed on a flammable substrate to continue burning without smoke. It refers to a test according to “Standard Test Method for Measuring Cigarette Ignition Strength” of “Standard E2187-04”. Thus, “complete burnout” means a situation where the call progresses through the entire striped area on the cigarette wrapper and does not cause the ignition cigarette to extinguish. Further, as used herein, the phrase “self-extinguish under natural combustion conditions” or “self-extinguishment under natural combustion conditions” refers to the smoke-free ignition cigarette when such cigarettes are in natural combustion conditions. It means fire extinguishing.

The striped regions described herein show both a low ignition tendency and a low rate of self-extinguishing under spontaneous combustion conditions. The striped region is preferably formed by printing, specifically, gravure printing as described in detail below. As an alternative to printing, the striped region is incorporated by reference in its entirety into a slurry of highly refined fibrous cellulose (eg, fibers, fibrils, microfibers, or combinations thereof). Including additional technology utilizing a moving orifice applicator in the forming section of a papermaking machine, as described in commonly owned US Pat. Nos. 5,997,691 and 6,596,125. Other additive materials added using various spraying or coating techniques can be included.
In another embodiment, the striped region can include first, second, and third bands of additive material added by any of the methods disclosed herein, where the second band is Preferably comprising perforations filled with an occlusive material that melts or evaporates when the combustion coal approaches the striped region, thereby providing a second zone with increased permeability.

  Accordingly, provided is a wrapping paper for a smoking article that includes a base web and at least one laterally striped region that includes first, second, and third bands. The first and third bands include an additional material that reduces the transmittance of the wrapping paper. The first and third strips are each under spontaneous combustion conditions (eg, 20 to 50), if either the first or third strip is added separately to the wrapping paper of the smoking article. The smoking article has a width that shows a statistically significant occurrence of complete burn-out (after testing of a cigarette batch) and statistically shows little or no occurrence of self-extinguishing. The sum of the widths of the first and third bands is determined by the smoking article under spontaneous combustion conditions when the band is added as a single continuous band (without slits or other discontinuities) to the smoking article wrapper. Is statistically indicative of little or no occurrence of complete burnout and statistically significant occurrence of self-extinguishing. The first and third bands are separated by the second band. The second band contains less or no additional material than the first and third bands. The wrapping paper has a greater transmission along the second band than along the first and third bands. The second band is compared to a smoking article in which the ignition smoking article including the first, second, and third bands includes a wrapping paper in which the first and third bands are added as a single continuous band. Either the width of the first and third bands (equal to show the occurrence of statistically reduced self-extinguishing under natural combustion conditions and at the same time maintain the occurrence of complete burnout with little or no statistically Or have a width that is smaller than that (which may have unequal widths). Preferably, the first and third zones are uniform in additive material across the first and third zones. Optionally, the second region has a width that is essentially equal to the first and third regions.

The total weight of the additional material in the striped region is preferably in the range of 0.5 grams per square meter (0.5 g / m ² ) to 15 g / m ² , more preferably from 0.5 g / m ^2. It is in the range of 3 g / m ² , more preferably in the range of 0.5 g / m ² to 1.5 g / m ² . The conventional cigarette paper, a transmission rate, expressed in customary CORESTA for measuring paper permeability from the perspective of the unit pressure drop unit area (water column cm) per (cm ²⁾ per volume flow (cm ³ / sec) It is permeable. The transmission of cigarette paper is usually greater than 20 CORESTA, preferably the cigarette paper has a transmission of about 33 to about 60 CORESTA and a basis weight of about 22 g / m ² to 30 g / m ² . However, the transmission through the striped area and the underlying cigarette paper is preferably in the range of zero to 15 CORESTA. The reduction in permeability preferably limits the air flow required to support the burning of cigarette coal in the vicinity of the striped region.

  The first and third bands preferably have a greater basis weight in grams per square meter than the intermediate second band, for example, the basis weight in grams per square meter of the first and third bands. The amount can be at least twice the basis weight in grams per square meter of the second band. The second band can include voids. As used herein, the term “void” refers to the striped region between the first and third bands that lacks any transmittance reducing additive material (ie, does not contain a layer of transmittance reducing additive material). Refers to an individual area. To aid combustion in the second band, the wrapper can include iron oxide at the second band location. The second band preferably has a greater transmission than the first and third bands.

  The base web, wherein the at least one laterally striped region preferably has a basis weight on the first printed layer, preferably in grams per square meter equal to or greater than the first printed layer. Including a first printed layer and a second printed layer. However, the second and / or subsequent layers can have a lower basis weight than the first layer. For example, the basis weight expressed in grams per square meter of the second printed layer can be at least twice the basis weight expressed in grams per square meter of the first printed layer. In one embodiment, the second band includes a single printed layer, and the first and third bands each include at least two printed layers (more preferably, three or more layers). Can be included. Alternatively, the first and third bands each include at least three or four printed layers, and the second band includes only one or two printed layers, or none at all. Can do.

  The non-striped areas of the base web preferably do not include a transmission reducing additive material. As will be described below in connection with FIG. 2, the laterally striped region can include more than three bands. For example, the laterally striped region includes, for example, five bands such that the second and fourth bands separate the first, third, and fifth bands, and the wrapping paper includes the first, third, And can have greater transmission along the second and fourth bands than along the fifth band.

Also provided is a wrapping paper for smoking articles that includes a base web and laterally striped regions of additional material. The laterally striped region is designed to extinguish a smoking article that includes the laterally striped region when left on the substrate. The wrapping paper further comprises a more transmissive intermediate band along the lateral striped region so that the occurrence of self-extinguishing of smoking articles including the wrapping paper is statistically reduced compared to that without the intermediate band .
In yet another embodiment, the wrapping paper of the smoking article includes a base web and at least one laterally striped region including first, second, and third bands on the base web. The at least one laterally striped region can be without filters, optionally so that at least one strip is at least partially formed of an additive material comprising a filler. The additive material is preferably uniform across the first and third zones. The first and third bands are outside the second band, and the overall wrapping structure in the second band is more transparent compared to the overall wrapping structure in the first and third bands. Have a rate.

Additionally provided is a wrapping paper for a smoking article that includes a base web and at least one laterally striped region including first, second, and third bands on the base web. The first and third bands are outside the second band, the second band has a greater transmittance compared to the first and third bands, and the second and first bands And the third zone includes additional material.
The wrapping paper of the present invention preferably comprises laterally striped regions or repetitive continuous laterally striped regions that are supplied on the bobbin and in which the wrapping paper on the bobbin is evenly spaced.

  Further provided is a streak of a smoking article that includes providing a base web and forming at least one laterally striped region including first, second, and third bands on the base web. It is a method of manufacturing a wrapping paper. The first and third bands are outside the second band, the second band has a greater transmittance compared to the first and third bands, and at least the first and third bands The band is formed of an additive material without filler. Optionally, at least one of the bands is formed of an additive material that at least partially includes a filler. The additive material is preferably uniform across the first and third zones.

  Further provided is a streak of a smoking article that includes providing a base web and forming at least one laterally striped region including first, second, and third bands on the base web. It is a method of manufacturing a wrapping paper. The first and third bands are outside the second band, the second band has a greater transmittance compared to the first and third bands, and the second and second bands The first and third bands are formed of an additional material. Optionally, at least one of the bands is formed of an additive material that at least partially includes a filler. The additive material is preferably uniform across the first and third zones.

  1-3 illustrate a smoking article that includes the slit striped paper described herein. Specifically, FIG. 1 shows a smoking article that includes two striped regions 10 on a base web 100, with first and third bands 11 of additive material each separated by a second band 12, 13 and the band may be in the form of voids or in the form of a band of reduced additive material. The first and third bands 11, 13 of additional material are each, for example, about 2 mm to about 5 mm, preferably about 2 mm to about 3 mm wide, and the second band 12 is about 1 mm to about 2 mm wide. can do. More specifically, the first and third bands 11 and 13 of additional material are each about 3 mm wide, for example, and the second band 12 is about 1.5 mm or about 2 mm wide, for example. Can do. The first and third bands 11, 13 of additive material preferably comprise a plurality of layers of additive material, for example two, three or four layers of additive material. The additive material is preferably uniform across the first and third zones 11, 13.

  FIG. 2 shows a smoking article comprising two striped regions 20 on the base web 100, the first, third and first of the additional material separated by the second and fourth bands 22,24, respectively. 5 bands 21, 23, 25, the bands can be in the form of voids or in the form of reduced additional material bands. The first, third, and fifth bands 21, 23, 25 of additional material are each about 2 mm to 3 mm wide, for example, and the second and fourth bands 22, 24 are each about 1 mm, for example, about 1 mm. To 2 mm wide. More preferably, the first, third, and fifth bands 21, 23, 25 of additive material are each, for example, about 2 mm wide, and the second and fourth bands 22, 24 are each, for example, The width can be about 1 mm or less. The first, third and fifth bands 21, 23, 25 of additive material preferably comprise a plurality of layers of additive material, for example two, three or four of additive material. The additive material is preferably uniform across the first, third, and fifth bands 21, 23, and 25.

  FIG. 3 shows a smoking article having two striped regions 30 on a base web 100, each of first and third bands 31 of additive material separated by a second band 32 of less additive material, 33. The first and third bands 31, 33 of additive material may each be, for example, about 2 mm to 3 mm wide, and the second band 32 with less additive material may be, for example, about 1 mm to about 2 mm wide. it can. More preferably, the first and third bands 31, 33 of additive material are each, for example, about 3 mm wide and the second band 32 with less additive material is, for example, about 2 mm wide or less. be able to. The first and third bands 31, 33 of additive material preferably comprise a plurality of layers of additive material, for example two, three or four layers of additive material, while the additive material is The fewer second bands 32 can include, for example, one or two layers of additional material. The additive material is preferably uniform across the first and third bands 31, 33. The second band 32 operates at a width of 1 mm, but this embodiment works well with a width of 1.2 mm or greater.

  1-3, slit striped paper facilitates the use of low-permeability wrapping paper for a given level of CO compared to the conventional design of striped paper. For example, in some situations, a cigarette containing paper having a transmission of 33CORESTA and 11 mg CO (FTC) delivery will receive 15 mg CO ( FTC) has been found to produce. In order to counteract that effect, the wrapping paper transmission would have to be increased to about 46 CORESTA. Such changes have many consequences for cigarette designs, for example, affecting the number of smoke absorptions and possibly reducing paper machinability. In contrast, a striped paper with a transmittance of 33 cholesterol units yielded 12 mg CO (FTC). Thus, the slit band approach described herein facilitates the addition of bands that have less impact on the CO level (FTC).

With reference to FIGS. 4 and 5, yet another embodiment may include a striped region where the strip extends in the longitudinal direction rather than the circumferential direction. More specifically, FIG. 4 corresponds to the striped region configuration of FIG. 2 in which the band extends in the vertical direction instead of the circumferential direction, and FIG. 5 illustrates the band in the vertical direction instead of the circumferential direction. This corresponds to a striped region configuration of 3.
In a preferred embodiment, the first layer of each striped region is preferably formed using a water soluble occlusive composition that extends completely across the striped region. Successive layers of each striped region can be formed using the same water-soluble film-forming composition or different water-soluble compositions. For example, the plurality of layers all include a layer containing limited starch, or the plurality of layers is one or more layers containing limited starch and one containing calcium carbonate. Or more layers can be included (in any order). During gravure printing, the occlusive composition is preferably heated to a temperature whose viscosity falls within a viscosity range suitable for gravure printing. Once the heated occlusive composition is added, the occlusive composition can be cooled or quenched to gel. In this way, a portion of the free water in the occlusive composition is constrained and becomes unavailable for penetration or migration into the fibers underlying the base web. The free water constraint suppresses the formation of corrugations, folds, and / or wrinkles in the base web. The continuous layer of striped regions preferably has an increased thickness relative to the first layer. The striped region provides a decrease in permeability relative to the underlying base web, which preferably restricts the air flow necessary to support the burning of cigarette coal in the vicinity of the striped region. Progressive multi-pass printing is the name of the applicant named “Progressive multi-pass printing striped paper” dated 15 August 2005, the entire disclosure of which is incorporated herein by reference. It can be found in owned US Provisional Patent Application No. 60 / 707,964.

  The occlusive composition used in the occlusive composition is selected from the group consisting of starch, alginate, guar gum, pectin, and mixtures thereof. Preferably, the occlusive composition comprises starch, more preferably oxidized starch such as, for example, tapioca starch, more specifically oxidized tapioca starch. In embodiments, the occlusive composition preferably does not include a filler such as calcium carbide that increases the burning rate over the striped region. In a preferred embodiment, the occlusive composition used for printing comprises water and from about 20% to about 50% occlusive composition. At higher concentrations of the occlusive composition within the composition, the composition may undergo gelation when its temperature drops rapidly. Therefore, free water may be fixed in the printed stripe region.

  At room temperature (about 23 ° C.), the high solid content occlusive composition has a viscosity greater than about 2 mPa (200 centipoise (cP)) and is unsuitable for gravure printing, but from about 40 ° C. to about 90 ° C. At temperatures in the range, the viscosity of the occlusive composition is sufficiently low to be viscous for use as a gravure printing composition. In the case of gravure printing, a suitable upper limit of viscosity is about 2 mPa (200 centipoise (cP)). Most preferably, the occlusive composition has a viscosity of about 1 mPa (100 cP) at a temperature in the range of about 40 ° C. to about 90 ° C., so that the composition is quenched upon contact with paper after gravure printing at that temperature. can do. The viscosity of the composition at room temperature is also important. High viscosity is required at room temperature so that the occlusive composition gels at room temperature.

Preferably, the striped areas are added to the wrapping paper using a continuous gravure printing process. The gravure printing operation allows accurate alignment of the continuous printing operation. Thus, gravure printing can substantially print not only the first layer in the striped region, but also any continuous layer.
In the continuous gravure printing process, preferably, after the first layer is applied to the base web, it is used to add a second layer to the first layer using a conventional continuous pass gravure printing device. Before being advanced to the gravure printing station, it can be dried thereon using suitable equipment. Preferably, the second layer has the same extent as the first layer in both the width and length directions, but the second layer has a different basis weight in grams per square meter from the first layer. Can have. The occlusive composition of the second layer gels on the cooler first layer and free water does not migrate to or be absorbed by the paper. Preferably, the second layer is dried using suitable equipment before being advanced to a continuous gravure printing station where a continuous layer is added. Preferably, the continuous layer is coextensive with the previous layer in both width and length (ie, the layer does not have a stepped appearance), but the continuous layer is in grams per square meter with respect to the previous layer. It can have different basis weights expressed or can contain different additive compositions. Preferably, the continuous layers are preferably allowed to dry naturally after printing each continuous layer by known gravure printing techniques and conventional gravure printing systems.

  The gravure printing process can be used immediately after paper manufacture, i.e. at a printing station located near the edge of the papermaking machine. Alternatively, the gravure printing process can be used in connection with a reel carrying a wrapping paper on which the striped areas are printed. For example, a wrapping paper reel having a selected transmission and a selected basis weight is incorporated so that the wrapping paper can be unwound from the reel as a continuous base web.

  The base web goes to or passes through a first gravure printing station where the first layer of each striped region is printed on paper. The printing process can be applied to the left side of the paper or the wire side or both. The wrapping paper then passes through a second gravure printing station where the second layer of each striped region is printed on the corresponding first layer. The additional layer is added in the same manner as described above. Finally, the wrapping paper with the printed striped area is wound on a collection reel. The collection reel is then cut into bobbins.

The equipment at each of the gravure printing stations has essentially the same material appearance. Accordingly, it will be sufficient to describe one of the gravure printing stations in detail, and it will be understood that other gravure printing stations have common characteristics unless otherwise noted. A single pass approach can be used instead of the multipass approach to produce striped paper.
In the first gravure printing station, the apparatus typically includes a gravure cylinder or roller that is incorporated to rotate about a horizontal axis. The generally cylindrical surface of the roller is patterned by appropriate processes (ie, using dots, lines, cells, etc.) to form the first layer negative of the striped region. Conventional etching (etching), chemical etching, electronic etching, photoetching can be used to pattern the surface of the gravure cylinder. The circumference of the roller is determined so that it is an integral multiple of the nominal distance between the striped regions plus the striped region width. In this way, for each rotation of the roller, a first layer of that integer striped region is printed on the wrapping paper.

  In gravure printing, each layer of additional material may be added uniformly, but each layer of additional material need not be added uniformly. For example, layers of additional material can be added such that individual portions of the layer have a gram weight per square meter that is different from other areas of the layer. This can be achieved, for example, by printing individual portions of the layer having different basis weights from other areas of the layer in different printing stages using additional materials having different basis weights. Alternatively, the layer of additional material can be applied such that individual portions of the layer have different depths than other areas of the layer. This can be accomplished, for example, by patterning the gravure cylinder or roller to provide discrete portions of the layer that have a different depth than the other areas of the layer.

  For example, multiple bands, such as the first, second, and third bands of striped regions described herein can be added in a single print stage or multiple print stages. When applied in multiple printing stages, each band containing additional material can be applied in a separate printing stage. For example, if the first, second, and third bands are accommodated and only the first and third bands are striped regions that contain additional material, the first band is applied at the first printing stage. However, the third band can be added in the second printing stage. Alternatively, when applied in a single printing stage, bands containing additional material are applied using properly patterned gravure printing cylinders or rollers. For example, in the case of a striped region containing first, second, and third bands, where only the first and third bands contain additional material, the gravure cylinder or roller may be Patterned to add additional material only to the band.

  An impression cylinder for reverse rotation is mounted on an axis parallel to the axis of the roller. In some applications, the impression cylinder includes a non-metallic elastic surface. The impression cylinder is disposed between the roller and the reverse roller, and the reverse roller is also mounted for rotation on an axis parallel to the axis of the roller, and rotates reversely with respect to the impression cylinder. One of the functions provided by the reverse roller is to cure the central portion of the impression cylinder so that a uniform printing pressure is obtained between the roller and the impression cylinder. The gravure printing cylinder or roller and impression cylinder cooperate to form a nip through which the base web passes during the printing process. The nip is dimensioned to clamp the base web as it moves between the gravure cylinder and the impression cylinder. The nip pressure on the base web ensures correct transfer of the composition from the cylinder to the paper.

  The reservoir contains the occlusive composition described above for forming a striped region on the wrapping paper. The reservoir is in communication with a suitable pump capable of handling the viscous occlusive composition. The occlusive composition then flows to a suitable heat exchanger where the temperature of the occlusive composition is raised so that it falls within the range of about 40 ° C. to about 90 ° C., so that the viscosity of the occlusive composition is reduced to gravure printing. It can be adjusted to a suitable level. As mentioned above, the viscosity for gravure printing should usually be lower than about 200 cP. Preferably, the temperature of the occlusive composition is selected such that the viscosity is less than 100 cP.

  Although separate heat exchangers are disclosed, it may be desirable to adjust the temperature of the occlusive composition in the reservoir itself. For example, a heating element and a stirring device can be included in the reservoir to maintain an elevated temperature of the occlusive composition. Placing the temperature adjustment device in the reservoir is presumed that the occlusive composition has already been heated, resulting in a decrease in viscosity, so the pump must handle the highly viscous occlusive composition associated with lower temperatures. This has the advantage that the pump selection and operating requirements are simpler. Regardless of whether the temperature adjustment is performed in a reservoir or in a separate heat exchanger, it is important that the temperature adjustment step be performed at a temperature selected to avoid scorching of the occlusive composition. . Scorch can cause discoloration of the occlusive composition and affect the occlusive properties of the composition. Thus, scorching should be avoided and the occlusive composition should be temperature adjusted.

  Regardless of where the temperature adjustment step takes place, the heated occlusive composition is routed to a suitable applicator that spreads the occlusive composition along the length of the gravure printing cylinder. The spreading step involves sending the liquid occlusive composition into a tank of the occlusive composition that is collected by pouring or spraying the occlusive composition into the gravure cylinder or simply at the bottom of the gravure cylinder between the gravure cylinder and the collector. Can be caused by The cylinder can be heated to avoid premature cooling of the composition.

  Generally, the collection device extends vertically around the gravure roller to a height sufficient to collect the tub, but to a height well below the top of the gravure printing cylinder. When the tank reaches the top of the collection device, the occlusive composition can flow back through the drainage channel to the reservoir at the bottom of the device. In this way, the occlusive composition can be circulated through the printing station and maintained at the proper printing viscosity by the temperature regulator described above.

  As the gravure printing cylinder rotates through the applicator and / or bath, the occlusive composition adheres to the surface of the gravure printing cylinder, including within the indentation provided therein to form a striped region. Further rotation of the gravure cylinder toward the nip moves the cylinder surface past the appropriate doctor blade. The doctor blade extends along the length of the gravure printing cylinder and is arranged so that it wipes the surface of the gravure printing cylinder. In this way, the portion of the gravure cylinder that forms the nominal spacing between adjacent striped regions essentially wipes away the occluding composition and at the same time forms the etched portion of the gravure cylinder itself. Advances toward the nip filled with the occlusive composition.

As the surface of the wrapping paper and gravure printing cylinder travels through the nip, the occlusive composition is transferred to the wrapping paper surface. The linear velocity or speed of the wrapping paper matches the tangential surface speed of both the gravure cylinder and impression cylinder as the wrapping paper passes through the nip. Thus, slipping and / or smearing of the occlusive composition on the wrapping paper is avoided.
The thickness of the multilayer striped region is preferably less than about 20% of the base web thickness and can be less than 5% of the base web thickness. The thickness of the first layer of the striped region added to the first gravure printing station is preferably less than 4% of the base web thickness and less than 1% of the base web thickness. it can. Thus, it can be seen that the thickness of the first layer is small compared to the thickness of the underlying base web.

  FIG. 6 is a schematic diagram of a multistage printing apparatus. Referring to the above description regarding multi-stage printing, FIG. 6 shows reel 40, first gravure printing station 42, second gravure printing station 44, third gravure printing station 46, collecting reel 48, roller 50, pressure Shown are barrel 52, reverse roller 54, nip 56, reservoir 58, pump 60, heat exchanger 62, applicator 64, tank 66, collection device 67, drainage channel 68, doctor blade 70, adjustment cylinder 72, and idler roller 74. ing. In FIG. 6, the features of the first gravure printing station 42 include a reference number with a subscript “a”, and the corresponding second gravure printing station 44 features a reference with a subscript “b”. The corresponding third gravure printing station 46 feature includes a reference number with a subscript “c”.

The following examples are intended to be non-limiting and merely illustrative. Cigarettes with 5 different wrapping papers (ie wrapping papers with 5 different striped area configurations) were tested for (horizontal) ignition tendency at 0 degrees (IP) and self-extinguishing (SE). Each base web of wrapping paper had a permeability of 33CORESTA and a basis weight of 25 g / m ² . As used herein, “IP” means complete burnout of cigarettes. Thus, an IP value of 0% means that 0% of the cigarettes tested showed complete burnout, and an IP value of 2.5% indicates that 2.5% of the cigarettes tested showed complete burnout. An IP value of 5% means that 5% of the cigarettes tested showed complete burnout. “SE” as used herein means self-extinguishing under natural combustion conditions. Thus, an SE value of 95% means that 95% of the cigarettes tested under natural combustion conditions showed self-extinguishing, while an SE value of 20% is 20% of the cigarettes tested under natural combustion conditions Means self-extinguishing.

(Table 1)

Referring to Table 1, wrapping paper A was a control containing a continuous solid 6 mm printed striped area with an addition rate of 5.5x. Addition ratio of 5.5x As used herein, the additive material of 9 g / m ² from 8 g / m ² on dry basis weight, and basis weight is added to the base web of 25 g / m ² 27 mm This provides a basis weight of 26.5 g / m ² for a 6 mm striped region having a phase (ie, the spacing from the leading edge of the striped region to the leading edge of the next striped region).

(Table 2)

(Table 3)

(Table 4)

(Table 5)

  Compared to control wrapping paper A, wrapping paper BE showed a desirable decrease in SE, while IP was maintained (ie, there was no significant increase in IP). In particular, wrapping paper B showed an improvement over control wrapping paper A, as can be seen from the fact that the SE average decreased from 95% to 60%. Further, comparing wrapping papers B and D shows that increasing the width of the second strip from 1 mm to 2 mm reduces the SE average from 60% to 25% (while maintaining the IP value substantially). Accordingly, the width of the second band is preferably greater than 1 mm, preferably about 1.5 mm or 2 mm. Good results were also shown by wrapping paper C showing an SE average of 45%, but the best results were shown by wrapping paper E showing an SE average of 20%.

  The wrapping paper E having striped regions including the first, second, third, fourth and fifth bands and showing the best results is the second and fourth of 1 mm with greater transmittance. Note that it had a band. In contrast, a wrapping paper B with a striped region containing only the first, second, and third bands with a 1 mm second band of greater transmittance does not work as well. It was. Accordingly, the wrapping paper having a striped region that simply includes the first, second, and third bands is preferably a striped region that includes the first, second, third, fourth, and fifth bands. Has a wider band of greater transmission (ie, about 1.5 mm or about 2 mm) than the larger transmission band of wrapping paper with

The terms or phrases used herein are not to be interpreted mathematically or geometrically correct, but rather geometric predicates approximate geometric terms and concepts or have similar meanings. Should be interpreted as Terms such as “generally” are intended to include both the exact meaning and concept of the related terms and provide reasonable tolerances consistent with the form, function, and / or meaning. .
While various embodiments have been described, it should be understood that variations and modifications can be relied upon, as will be apparent to those skilled in the art. For example, although the embodiments have been described as preferably having 1 mm to 2 mm wide slits, it is contemplated that other embodiments can be configured with 1 mm to 3 mm wide slits. Such variations and modifications are considered to be within the spirit and scope of the appended claims.

It is a figure which shows the smoking article containing the slit striped paper of description in this specification. It is a figure which shows the smoking article containing the slit striped paper of description in this specification. It is a figure which shows the smoking article containing the slit striped paper of description in this specification. FIG. 6 illustrates an alternative embodiment of a smoking article that includes slit striped paper as described herein. FIG. 6 illustrates an alternative embodiment of a smoking article that includes slit striped paper as described herein. It is the schematic of a multistage printing apparatus.

Explanation of symbols

10 Striped region 11 First band of additional material 13 Third band of additional material,
100 base web

Claims (24)

Wrapping paper for smoking articles,
The base web,
At least one laterally striped region including first, second, and third bands;
Including
The first and third bands include a uniform additive material over each of the bands that reduce the transmission of the wrapping paper,
Each of said first and third zones are to not 2mm has a width of 3 mm, if any of the first and third zones is tentatively added separately to wrappers of smoking articles , the smoking article has a resulting full burnt down in free burn conditions, and does not cause self-extinguishing width,
The sum of the first and the width of the third band, when the band of the first and third are tentatively added to the wrapper of the smoking article as a single continuous strip, said smoking article, spontaneous combustion It does not cause complete burnout under the conditions and causes self-extinguishing,
The first and third bands are separated by the second band, and the second band has a width of 1 mm to 2 mm;
Wrapping paper has greater transmission along the second band than along the first and third bands, and the first and third bands are added as a single continuous band compared to smoking articles comprising a wrapper, the first ignition smoking article comprising a second and third band of, while maintaining that does not cause a complete burnt down in free burn conditions, the self-extinguishing The second band has a width less than the width of any of the first and third bands, so as to reduce generation;
Wrapping paper characterized by that.   The wrapping paper according to claim 1, wherein each of the first and third bands having the additional material has a width of 3 mm. The wrapping paper according to any of claims 1 or 2 , wherein the first and third bands have a basis weight expressed in grams per square meter that is larger than the second band. The basis weight, expressed in grams per square meter of the first and third zones are to claim 3, characterized in that at least twice the basis weight, expressed in grams per square meter of the second zone Wrapping paper as described. Said second zone is, wrapping paper according to any one of claims 1 or 2, characterized in that it is free of additional materials. Wherein the at least one transverse banded region, according to claim 1 or 2, characterized in that it comprises a first printed layer contacting the base web and a second printed layer on the first printed layer The wrapping paper according to any one of the claims. The wrapping paper according to any one of claims 1 or 2 , wherein the at least one laterally striped region is a highly solid occlusive composition on the base web. The high solid content occlusive composition has a viscosity of greater than 2 mPa (200 centipoise (cP)) at 23 ° C., and the viscosity at temperatures from 40 ° C. to about 90 ° C. is sufficient to be used as a gravure printing composition The wrapping paper according to claim 7 , wherein the wrapping paper is low. The wrapping paper according to claim 8 , wherein the viscosity at a temperature of 40 ° C to about 90 ° C is 1 mPa (100 centipoise (cP)). The laterally striped region includes first, third, and fifth bands that include additional material separated by second and fourth bands that do not include additional material or include a low level of additional material. The wrapping paper according to any one of claims 1 and 2 . The wrapping paper according to claim 10 , wherein the fifth band has a width of 2 mm to 3 mm.   12. The wrapping paper according to claim 11, wherein the first, third and fifth bands have a width of 2 mm. The wrapping paper according to claim 10 , wherein the fourth band has a width of 1 mm to 2 mm. ^{3. The} claim of claim 1 or 2, wherein the additional material is present in the striped region at 0.5 grams per square meter (0.5 g / m < ² >) to 15 g / m < ² >. Wrapping paper as described. Packaging paper according to claim 14, wherein the additional material, characterized in that present in the striped region from 0.5 g / m ² in 3 g / m ^2. Packaging paper according to claim 14, wherein the additional material, characterized in that present in the striped region from 0.5 g / m ² at 1.5 g / m ^2. The wrapping paper according to any one of claims 1 and 2, wherein the transmittance of the base web exceeds 20CORESTA. 18. The wrapping paper according to claim 17 , wherein the base web has a transmittance of 33 to 60 CORESTA. 3. The wrapping paper according to claim 1, wherein the base web has a basis weight of 22 g / m ² to 30 g / m ² . The wrapping paper according to claim 1 or 2 , wherein the transmittance of the striped region and the cigarette paper thereunder is from 0 to 15 CORESTA. A method for producing a striped wrapping paper for a smoking article according to claim 1 or 2 ,
Supplying a base web;
Forming at least one laterally striped region comprising first, second, and third bands on the base web;
Including
The first and third bands are outside the second band;
The second band has a greater transmittance compared to the first and third bands;
At least the first and third bands are formed of an additive-free material;
The width of the second band is smaller than the width of the first band and the third band;
A method characterized by that. The method of claim 21 , comprising forming at least the first and third bands by printing a first printed layer of additional material on the base web. 23. A method according to claim 21 or claim 22 , wherein the at least one laterally striped region is formed by printing an occlusive material on the base web. The printing step includes:
Heating the occlusive material;
Applying the heated plugging material to a patterned gravure printing cylinder;
Contacting the advancing wrapping paper with the patterned gravure printing cylinder;
Gelling the occlusive material by contacting the surface of the wrapping paper so that the occlusive material does not disturb the flatness of the wrapping paper;
including,
24. The method of claim 23 .

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