U.S. patent application number 16/635269 was filed with the patent office on 2021-02-04 for wrapping paper for a smoking article.
This patent application is currently assigned to JT International S.A.. The applicant listed for this patent is JT International S.A.. Invention is credited to Hiroyoshi Ono.
Application Number | 20210030055 16/635269 |
Document ID | / |
Family ID | 1000005198327 |
Filed Date | 2021-02-04 |
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United States Patent
Application |
20210030055 |
Kind Code |
A1 |
Ono; Hiroyoshi |
February 4, 2021 |
Wrapping Paper For A Smoking Article
Abstract
A wrapping paper for a smoking article includes a base paper,
wherein the base paper includes a plurality of burn-suppressing
regions that are provided apart from each other on one surface of
the wrapping paper, wherein the ratio of diffusion capacity between
the burn-suppressing regions and the base paper is in the range of
5% to 35%.
Inventors: |
Ono; Hiroyoshi; (Tokyo,
JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
JT International S.A. |
Geneva |
|
CH |
|
|
Assignee: |
JT International S.A.
Geneva
CH
|
Family ID: |
1000005198327 |
Appl. No.: |
16/635269 |
Filed: |
August 14, 2018 |
PCT Filed: |
August 14, 2018 |
PCT NO: |
PCT/EP2018/072020 |
371 Date: |
January 30, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
D21H 17/15 20130101;
D21H 17/675 20130101; A24D 1/025 20130101; D21H 27/00 20130101;
D21H 21/34 20130101 |
International
Class: |
A24D 1/02 20060101
A24D001/02; D21H 27/00 20060101 D21H027/00; D21H 21/34 20060101
D21H021/34; D21H 17/15 20060101 D21H017/15; D21H 17/67 20060101
D21H017/67 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 24, 2017 |
EP |
17187689.9 |
Claims
1. A wrapping paper for a smoking article, comprising a base paper,
wherein the base paper comprises a plurality of burn-suppressing
regions that are provided apart from each other, wherein a ratio of
a diffusion capacity of the plurality of burn-suppressing regions
to a diffusion capacity of the base paper is in the range of 5% to
35%.
2. The wrapping paper according to claim 1, wherein the diffusion
capacity of the plurality of burn-suppressing regions is 0.10 to
0.35 cm/s.
3. The wrapping paper according to claims 1, wherein the diffusion
capacity of the base paper is 1.0 to 2.0 cm/s.
4. The wrapping paper according to claim 1, wherein the plurality
of burn-suppressing regions are provided on a surface of the base
paper.
5. The wrapping paper according to claim 1, wherein the plurality
of burn-suppressing regions are provided embedded in a matrix of
the base paper.
6. The wrapping paper according to claim 1, wherein the plurality
of burn-suppressing regions contain at least one additive that
reduces the diffusion capacity of the base paper, and wherein the
at least one additives is selected from the group consisting of
alginates, polyvinyl alcohol, polyvinyl acetates, modified and
unmodified starches, cellulose derivatives, inorganic ions, natural
gums, or mixtures thereof.
7. The wrapping paper according to claim 1, wherein the plurality
of burn-suppressing regions are in a form of stripes.
8. The wrapping paper according to claim 1, wherein the base paper
comprises a fibrous material, a filler material, and one or more
burning additives.
9. The wrapping paper according to claim 8, wherein a paper
porosity of the base paper is 10 to 60 CU and a total amount of the
one or more burning additives is 0.1 to 0.7 wt.-% based on a dry
weight of the base paper.
10. The wrapping paper according to claim 8, wherein the one or
more burning additives is selected from the group consisting of
citrate salts, acetate salts, phosphate salts, tartrate salts,
nitrate salts, or mixtures thereof.
11. The wrapping paper according to claim 1, wherein a basis weight
of the base paper is 20 to 26 g/m.sup.2.
12. The wrapping paper according to any of the previous claims 8,
wherein an amount of the filler material is 17 to 23 wt.-% based on
the dry weight of the base paper.
13. The wrapping paper according to claim 8, wherein the filler
material is selected from the group consisting of calcium
carbonate, kaolin clay, talc, titanium dioxide, alumina trihydrate,
and precipitated silica and silicates (PSS), or mixtures
thereof.
14. The wrapping paper according to claim 8, wherein the fibrous
material is a cellulosic fibrous material.
15. A smoking article, comprising a charge of smokable material
surrounded by a wrapping paper according to claim 1.
Description
TECHNICAL FIELD
[0001] The present invention relates to a wrapping paper for a
smoking article that has a low ignition propensity and a smoking
article comprising a wrapping paper that has a low ignition
propensity.
BACKGROUND ART
[0002] When a burning smoking article is left on furnishings and
equipment, such as a couch or a bed, it could cause a fire. In
order to prevent this, several approaches are known from the state
of the art to cause a smoking article to self-extinguish. These
types of smoking articles are generally known as "low ignition
propensity" smoking articles. However it is undesirable to have a
smoking article self-extinguish while a smoker is using it.
[0003] US 2013/104,915 teaches a cigarette paper that provides a
cigarette manufactured therefrom with self-extinguishing
properties, wherein the base paper has a CO.sub.2 diffusivity of
less than 0.35 cm/s and the cigarette paper comprises at least one
discrete area, wherein this area is perforated and has an air
permeability greater than the air permeability beyond the
perforated area.
[0004] US 2016/198,761 relates to a cigarette paper with
self-extinguishing properties that has treated areas, onto which a
composition is applied that contains filler particles or a mixture
of filler particles, wherein the diffusion capacity in the treated
areas is less than in an untreated area of the cigarette paper. In
this regard, at least 20% by weight of the filler particles in the
treated areas are formed by a filler with a flaked shape, a filler
with a scalenohedral crystal structure, a filler with a
rhombohedral crystal structure, or a filler with a cubic shape. To
prevent a fire and to suppress sidestream smoke, Japanese Utility
Model No.
[0005] 3049857 discloses a cigarette wherein the length of the
tobacco rod is half that of the ordinary cigarette. Also Japanese
Patent Application KOKAI No. 7-327654 discloses a cigarette wherein
the length of the tobacco rod is decreased to 1 to 1.5 cm in order
to prevent a fire and to suppress the sidestream smoke. These
cigarettes having a shorter than usual tobacco rod provide a number
of puffs considerably smaller than that provided by the cigarette
available on the market.
[0006] The problem of the present invention is to provide a
wrapping paper for a smoking article that has a low ignition
propensity and a reduced impact on taste.
BRIEF DESCRIPTION OF THE INVENTION
[0007] The inventors have found that by providing a wrapping paper
for a smoking article with a plurality of burn-suppressing regions
and a certain ratio of diffusion capacity between the
burn-suppressing regions and the base paper, i.e. the
non-burn-suppressing regions, it is possible to obtain a low
ignition propensity smoking article with a reduced impact on
taste.
[0008] A first aspect of the present invention relates to a
wrapping paper comprising a base paper, where the base paper
comprises a plurality of burn-suppressing regions that are provided
apart from each other, wherein the ratio of diffusion capacity
between the burn-suppressing regions and the base paper, i.e. the
non-burn suppressing regions, is in the range of 5% to 35%.
[0009] In another aspect of the present invention, a smoking
article is disclosed comprising a charge of smokable material
surrounded by a wrapping paper according to the first aspect of the
invention. The smoking article is in particular a low ignition
propensity smoking article.
[0010] Further aspects and embodiments of the invention are
disclosed in the dependent claims and can be taken from the
following description and examples, without being limited
thereto.
FIGURES
[0011] The enclosed drawings should illustrate embodiments of the
present invention and convey a further understanding thereof. In
connection with the description it serves as explanation of
concepts and principles of the invention. Other embodiments and
many of the stated advantages can be derived in relation to the
drawings.
[0012] FIG. 1 is a schematic perspective view, partly broken away,
showing an example of a cigarette that is wrapped with a cigarette
paper having stripe-shaped burn-suppressing regions according to
one embodiment of the present invention.
[0013] The cigarette 10 has a tobacco rod 11 consisting of a
tobacco filler 13 that is wrapped with a wrapping paper 12 of the
present invention in the form of a column. An ordinary filter 15
may be attached to the proximal end (namely, the downstream end in
the inhaling direction) 11b of the tobacco rod 11 by using a
tipping paper 14 according to a conventional method.
[0014] A plurality of stripe-shaped burn-suppressing regions 122,
which are coated as will be explained in the forthcoming
description, are formed on one of the surfaces of the base paper
121 that constitutes the wrapping paper 12 of the present
invention. These stripe-shaped burn-suppressing regions 122 are
formed apart from each other in the circumferential direction of
the tobacco rod 11.
[0015] Non-burn-suppressing regions 123 are formed between the
adjacent stripe-shaped burn-suppressing regions 122. Since the
regions 123 are constituted by a part of the base paper 121, they
can burn in an ordinary smoking state. Therefore, the regions 123
each act as a non-burn-suppressing region. For example, the
stripe-shaped burn-suppressing regions 122 each may have a width of
1 to 6 mm in the circumferential direction. The distance between
the adjacent burn-suppressing regions 122 may be 2 to 20 mm. In the
cigarette shown in FIG. 1, a non-burn-suppressing region 124 may be
provided to the region covering a distance d from the tip 11a of
the base paper 121.
[0016] FIG. 2 is a schematic perspective view, partly broken away,
showing an example of a cigarette that is wrapped with a cigarette
paper having annular band-shaped burn-suppressing regions according
to another embodiment of the present invention.
[0017] The cigarette 20 has a similar structure to that of the
cigarette 10 shown in FIG. 1, except for the structure of the
burn-suppressing regions in the wrapping paper. Therefore, in FIG.
2, an identical reference number is assigned to the same element as
the constitutional element in FIG. 1, and the explanation thereof
is omitted.
[0018] In the cigarette 20 shown in FIG. 2, a plurality of annular
band-shaped burn-suppressing regions 211 are formed on the base
paper 121 of the wrapping paper 21 wrapping the tobacco filler 13,
defining burn-suppressing regions. These annular band-shaped
burn-suppressing regions 211 are formed apart from each other in
the longitudinal direction of the tobacco rod 11.
[0019] Non-burn-suppressing regions 212 are formed between the
adjacent annular band-shaped burn-suppressing regions 211. Since
the non-burn-suppressing regions 212 are constituted by a part of
the base paper 121, they can burn in an ordinary smoking state.
Therefore, the regions 212 each act as a non-burn-suppressing
region, as the regions 123 in FIG. 1 do. For example, the annular
band-shaped burn-suppressing regions 211 each may have a width of 4
to 7 mm in the longitudinal direction. The distance between the
adjacent burn-suppressing regions 24 may be 18 to 25 mm.
DETAILED DESCRIPTION OF THE INVENTION
[0020] Unless defined otherwise, technical and scientific terms
used herein have the same meaning as commonly understood by one of
ordinary skill in the art to which this invention belongs.
[0021] All values given in the present disclosure are to be
understood to be complemented by the word "about", unless it is
clear to the contrary from the context.
[0022] Smoking articles as referred to herein are not particularly
limited and can for example be cigarettes, cigarillos or the like.
They typically have a generally cylindrical rod shaped
configuration and include a charge, roll, or column of smokable
material, such as shredded tobacco (e.g. in cut filler form), which
is surrounded by a paper wrapper forming a so-called "tobacco rod".
A cigarette or cigarillo usually also has a cylindrical filter
element aligned in end-to-end relationship with the tobacco rod.
The filter element may, for example, comprise a plug of cellulose
acetate tow, and the tow is circumscribed by a wrapper material
known as "plug wrap". Typically, the filter element is attached to
one end of the tobacco rod using a circumscribing wrapping material
known as "tipping wrapper". The filter element wrapped by the
tipping wrapper is known as "mouthpiece element".
[0023] As used herein, wt.-% is to be understood as weight percent,
based on the dry weight of the base paper, unless explicitly
otherwise specified. In the present disclosure, all amounts given
in wt.-% in a particular embodiment add up to 100 wt.-%. The weight
percent are thereby calculated by dividing the mass of each
component by the dry mass of the base paper.
[0024] As used herein, a "low ignition propensity" smoking article
is one that has been designed to be less likely than a conventional
cigarette to ignite furnishings and equipment, e.g. soft
furnishings such as a couch or mattress. Ideally, a low ignition
propensity smoking article will continue to burn when freely
suspended such as in the holder of an ashtray or when being held in
the hand without puffing ("free burn"). The tendency for a
cigarette to go out during free burn is referred to as
"self-extinguishment".
[0025] The capability of a smoking article to extinguish or to
generate sufficient heat to continue burning, and thus potentially
cause ignition of bedding or upholstered furniture (referred to as
LIP) may be measured by any suitable method. In the present
invention this is done according to ISO 12863:2010.
[0026] The likelihood of a smoking article to extinguish while
burning in free air (referred to as FASE) may be measured by any
suitable method. In the present invention this is done according to
ISO 12863:2010.
[0027] TNCO levels as referred to herein stand for tar, nicotine
and carbon monoxide levels and can be measured by any suitable
method. In the present invention this is done according to ISO
3308:2012.
[0028] The symbol "CU" herein designates the CORESTA air
permeability unit that is commonly used in paper specifications by
smoking article designers. The CORESTA air permeability unit is
defined as: "the volumetric flow rate of air in cubic centimeters
per minute (cm3/min) passing through a 1 square centimeter (cm2)
sample of substrate at an applied pressure difference of 1
kilo-Pascal (kPa)." and are measured according to ISO
6565:2011.
[0029] The number of puffs of a smoking article may be measured by
any suitable method. In the present invention this is done
according to ISO 3308:2012.
[0030] The diffusion capacity of a wrapping paper is measured in
the present invention according to CORESTA Recommended Method No.
77 (CRM No. 77) of April 2014.
[0031] The present invention relates to a wrapping paper for a
smoking article comprising a base paper, wherein the base paper
comprises a plurality of burn-suppressing regions that are provided
apart from each other, wherein the ratio of diffusion capacity
between the burn-suppressing regions and the base paper is in the
range of 5% to 35%. By providing this ratio of diffusion capacity
between the burn-suppressing regions and the base paper outside of
the burn-suppressing regions (non-burn-suppressing regions) it is
possible to provide a low ignition propensity smoking article with
a reduced impact on taste. The wrapping paper is formed of a base
paper with burn-suppressing regions provided therein. As the
regions of the wrapping paper which are outside the
burn-suppressing regions are to be considered as non-burn
suppressing regions the latter being the same as the base paper,
the present application uses the terms "non-burn suppressing
regions" and "base paper" interchangeably.
[0032] In certain embodiments of the present wrapping paper, the
ratio of diffusion capacity between the burn-suppressing regions
and the non-burn-suppressing regions, i.e. the base paper, is in
the range of 10% to 35%, or 15% to 35%, or 5% to 30%, or 10% to
30%, or 15% to 30%, or 10% to 25%, or 15% to 25%.
[0033] In a particularly preferred embodiment, the ratio of
diffusion capacity between the burn-suppressing regions and the
non-burn-suppressing regions is in the range of 9% to 17%. It has
been found that the impact on taste is particularly reduced in this
range while the wrapping paper still exhibits a good LIP and FASE
performance.
[0034] The burn-suppressing regions may be provided on a surface of
the base paper or embedded within a matrix of the base paper. The
plurality of burn-suppressing regions may be provided on a same
surface of the base paper. Alternatively, one or more of the
plurality of burn-suppressing regions may be provided on a first
surface of the base paper and the remaining of the plurality of
burn-suppressing regions may be provided on a second, opposite
surface of the base paper.
[0035] The shape and amount of these burn-suppressing regions is
not further limited and may vary according to the specific
requirements of the smoking article. In certain embodiments the
burn-suppressing regions are in a form of stripes. In one
embodiment all stripes are parallel to each other. In another
embodiment at least two stripes are non-parallel to each other.
[0036] In certain embodiments of the present smoking article
comprising a wrapping paper, when a tobacco rod is wrapped by the
wrapping paper, the burn-suppressing regions are in a form of
stripes extending in a longitudinal direction of the tobacco rod
and being spaced apart from each other in a circumferential
direction of the tobacco rod.
[0037] In certain embodiments of the present smoking article
comprising a wrapping paper, when a tobacco rod is wrapped by the
wrapping paper, the burn-suppressing regions are in a form of round
annular bands extending in a circumferential direction of the
tobacco rod and being spaced from each other in a longitudinal
direction of the tobacco rod.
[0038] In certain embodiments of the present wrapping paper, the
diffusion capacity of the base paper, i.e. the non-burn suppressing
regions, is 1.0 to 2.0 cm/s, e.g. 1.0 to 1.8 cm/s, or e.g. 1.2 to
1.6 cm/s, or e.g. 1.2 to 2.0 cm/s, or e.g. 1.2 to 1.8 cm/s, or e.g.
1.2 to 1.6 cm/s, or e.g. 1.4 to 2.0 cm/s, or e.g. 1.4 to 1.8 cm/s,
or e.g. 1.4 to 1.6 cm/s.
[0039] In certain embodiments of the a wrapping paper, the
diffusion capacity of the burn-suppressing regions is 0.10 to 0.35
cm/s, or e.g. 0.15 to 0.35 cm/s, or e.g. 0.20 to 0.35 cm/s or e.g.
0.10 to 0.30 cm/s, or e.g. 0.15 to 0.30 cm/s, or e.g. 0.20 to 0.30
cm/s, or e.g. 0.10 to 0.25 cm/s, or e.g. 0.15 to 0.25 cm/s, or e.g.
0.20 to 0.25 cm/s.
[0040] These burn-suppressing regions may contain additives that
reduce the diffusion capacity of the base paper. The additives that
may be applied to the wrapper may be any of those used in the art
to reduce the ignition propensity of smoking articles.
[0041] In certain embodiments of the present wrapping paper, the
burn-suppressing regions in the wrapping paper contain at least one
additive that reduces the diffusion capacity of the base paper. The
additives are optionally selected from the group consisting of
alginates, polyvinyl alcohol, polyvinyl acetates, including
partially hydrolyzed derivatives and copolymers, modified and
unmodified starches, cellulose derivatives, such as carboxy-methyl
cellulose, ethyl-cellulose, hydroxymethyl-cellulose and
combinations thereof. The additives may further comprise inorganic
ions such as phosphates, mono- or divalent metal salts, silicas or
mixtures thereof. The additives may yet further comprise natural
gums, such as guar gum.
[0042] The additives may be applied to the wrapping paper with a
liquid carrier, which may be in the form of a solution, suspension,
emulsion or a combination thereof. The liquid carrier may be
aqueous, non-aqueous or a combination thereof and may contain an
emulsifying agent depending on the nature of the additives.
[0043] In one embodiment, a suspension of additive may be applied
within an aqueous carrier. The aqueous carrier penetrates the base
paper transporting the additive into its matrix. Once the carrier
evaporates, the additive is left within the base paper matrix where
it can reduce the diffusion capacity either before or during the
burning of the smoking article. Once applied to the base paper, the
liquid carrier is allowed to evaporate allowing the wrapping paper
to dry and for the additive to set within the matrix of the base
paper.
[0044] In certain embodiments of the present wrapping paper, the
base paper comprises a fibrous material, a filler material, and one
or more burning additives. In certain embodiments of the present
wrapping paper, the paper porosity of the base paper is 10 to 60 CU
and a total amount of burning additive is 0.1 to 0.7 wt.-% based on
the dry weight of the base paper. By providing a base paper with
such porosity and amount of burning additive it is possible to
increase the puff count of the smoking article without impacting on
the TNCO levels nor changing the tobacco rod length or
diameter.
[0045] In certain embodiments of the present wrapping paper, the
paper porosity of the base paper is 10 to 50 CU, e.g. 15 to 45 CU.
This further increases the puff count of the smoking article.
[0046] In certain embodiments of the present wrapping paper, the
burning additive is included in the base paper in an amount of 0.2
to 0.6 wt.-%, e.g. 0.3 to 0.5 wt.-% based on the dry weight of the
base paper. This further increases the puff count of the smoking
article.
[0047] In certain embodiments of the present wrapping paper, the
burning additive is selected from the group consisting of citrate
salts, e.g. sodium and potassium citrate, acetate salts, e.g.
sodium and potassium acetate, phosphate salts, e.g. sodium and
potassium phosphate, tartrate salts, e.g. sodium and potassium
tartrate, nitrate salts, e.g. sodium and potassium nitrate, or
mixtures thereof.
[0048] The burning additive is not particularly limited, as long as
it is suitable for use in a smoking article. In certain embodiments
citrate salts are used.
[0049] In certain embodiments of the present wrapping paper, the
amount of filler in the base paper is 17 to 28 wt.-%, e.g. 20 to 25
wt.-%, based on the dry weight of the base paper. This amount of
filler provides an adequate resistance to manufacturing forces to
which the wrapping paper is subject to during high speed
manufacturing and also allows obtaining a desired opacity of the
wrapping paper.
[0050] In certain embodiments of the present smoking article
comprising a wrapping paper, the filler in the base paper is
selected from the group consisting of calcium carbonate, such as
precipitated calcium carbonate (PCC) or ground calcium carbonate
(GCC), kaolin clay, talc, titanium dioxide, alumina trihydrate, and
precipitated silica and silicates (PSS), or mixtures thereof.
[0051] Just like the burning additive, the filler is not
particularly limited, as long as it is suitable for use in a
smoking article. In certain embodiments calcium carbonate is
used.
[0052] In one embodiment, the paper porosity of the base paper is
40 to 50 CU, e.g. 43 to 47 CU, e.g. 45 CU, the total amount of
burning additive is in an amount of 0.4 to 0.6 wt.-%, e.g. 0.5
wt.-%, based on the dry weight of the base paper, and the amount of
filler in the base paper is 17 to 23 wt.-%, e.g. 19 to 21 wt.-%,
e.g. 20 wt.-%, based on the dry weight of the base paper.
[0053] According to certain embodiments, the balance to 100 wt.-%
of the dry weight of the base paper is essentially filler and
fibrous material. In certain embodiments of the present wrapping
paper, the basis weight of the base paper is 20 to 26 g/m.sup.2,
e.g. 21 to 24 g/m.sup.2, or e.g. 23 to 25 g/m.sup.2, e.g. 24
g/m.sup.2. By providing a base paper with a basis weight comprised
in these ranges it is possible to obtain a desired opacity of the
wrapping paper while controlling the level of CO.
[0054] In certain embodiments of the present wrapping paper, the
fibrous material is a cellulosic fibrous material.
[0055] The present invention further relates to a smoking article
comprising a wrapping paper as in the embodiments described above
and in which the wrapping paper surrounds a charge, roll or column
of smokable material to form a tobacco rod.
[0056] In certain embodiments of the present smoking article, when
a tobacco rod is wrapped by the wrapping paper, the
burn-suppressing regions are in a form of stripes extending in a
longitudinal direction of the tobacco rod and being spaced apart
from each other in a circumferential direction of the tobacco
rod.
[0057] In certain embodiments of the present smoking article, when
a tobacco rod is wrapped by the wrapping paper, the
burn-suppressing regions are in a form of round annular bands
extending in a circumferential direction of the tobacco rod and
being spaced from each other in a longitudinal direction of the
tobacco rod.
[0058] The present invention relates to a wrapping paper comprising
a plurality of burn-suppressing regions that are provided apart
from each other on one surface of the wrapping paper, wherein the
ratio of diffusion capacity between the burn-suppressing regions
and the non-burn suppressing regions is in the range of 5% to
35%.
[0059] Without being bound to a certain theory, the positive effect
of the present invention, i.e. the combination of a low ignition
propensity without a deterioration of taste properties is due to
the specific ratio of diffusion capacity between the
burn-suppressing regions and the non-burn suppressing regions that
are provided apart from each other at the base paper as laid out
above.
[0060] The above embodiments can be combined arbitrarily, if
appropriate. Further possible embodiments and implementations of
the invention comprise also combinations of features not explicitly
mentioned in the foregoing or in the following with regard to the
examples of the invention. Particularly, a person skilled in the
art will also add individual aspects as improvements or additions
to the respective basic form of the invention.
EXAMPLES
[0061] The present invention will now be described in detail with
reference to examples thereof. However, these examples are
illustrative and do not limit the scope of the invention.
Example 1
[0062] Two 84 mm cigarettes with increased puff count were prepared
with the same tobacco blend. These cigarettes had both a 63 mm
tobacco rod attached to a 21 mm filter by a tipping paper. The
filters were cut from the same filter rod and the tipping papers
were cut from the same reel. The tobacco rod of cigarette A was
wrapped in a prior art wrapping paper (paper A), while cigarette B
was wrapped in a wrapping paper according to the invention (paper
B). In both wrapping papers the burn-suppressing regions were 6 mm
wide annular bands separated between them by 18 mm in a
construction similar to the one depicted in FIG. 2. The
specifications of the respective wrapping papers are indicated in
Table 1 below.
TABLE-US-00001 TABLE 1 Paper A Paper B Basis weight 27 g/m.sup.2 24
g/m.sup.2 Porosity 80 CU 45 CU Diffusion capacity in the burn-
0.045 cm/s 0.230 cm/s suppressing regions Diffusion capacity in the
non-burn- 2.3 cm/s 1.8 cm/s suppressing regions (base paper
diffusion capacity) Burning additive type Citrate salt Citrate salt
Burning additive amount 1.4 wt.-% 0.5 wt.-% Filler (calcium
carbonate) 27.7 wt.-% 20.0 wt.-%
[0063] These cigarettes were measured under ISO 3308:2012
conditions to determine their TNCO levels as well as their
respective puff counts. Self-extinguishment was also measured for
these cigarettes, both when positioned on a surface (ISO
12863:2010--referred to as is LIP) and when burning in free air
(ISO 12863:2010--referred to as FASE). The results are shown in
Table 2 below. It was found that wrapping paper B increased the
puff count of cigarette B by 1.3 while maintaining very similar
TNCO levels. Paper B also shows a high self-extinguishing rate when
positioned on a surface and a significantly improved performance
when burning in free air.
[0064] A blind smoking test conducted with a panel of smoking
experts was used to evaluate the impact on taste. The test
consisted of providing one cigarette of each type to each panelist,
who smoked them consecutively and then indicated which one tasted
better. The panel of experts concluded that cigarette B has a
better taste than cigarette A.
TABLE-US-00002 TABLE 2 Cigarette A Cigarette B Tar 9.8 mg 10.0 mg
Nicotine 0.80 mg 0.85 mg CO 9.0 mg 9.3 mg Puff count 6.8 8.1 LIP
100% 94% FASE 30% 8%
EXAMPLE 2
[0065] Two 84 mm low ignition propensity cigarettes were prepared
with the same tobacco blend. These cigarettes had both a 57 mm
tobacco rod attached to a 27 mm filter by a tipping paper. The
filters were cut from the same filter rod and the tipping papers
were cut from the same reel. The tobacco rod of cigarette C was
wrapped in the prior art wrapping paper from example 1 (paper A),
while cigarette D was wrapped in the wrapping paper according to
the invention from example 1 (paper B).A
[0066] These cigarettes were measured under ISO 3308:2012
conditions to determine their TNCO levels as well as their
respective puff counts. Self-extinguishment was also measured for
these cigarettes, both when positioned on a surface (ISO
12863:2010--referred to as LIP) and when burning in free air (ISO
12863:2010--referred to as FASE). The results are shown in Table 3
below. It was found that wrapping paper B increased the puff count
of cigarette B by 0.9 while maintaining very similar TNCO levels.
Paper B continues to show a high self-extinguishing rate when
positioned on a surface and a significantly improved performance
when burning in free air.
[0067] A blind smoking test conducted with a panel of smoking
experts as in example 1 showed that cigarette D has a better taste
than cigarette C.
TABLE-US-00003 TABLE 3 Cigarette C Cigarette D Tar 8.0 8.1 Nicotine
0.62 0.68 CO 9.1 9.2 Puff count 5.6 6.5 LIP 98% 95% FASE 38%
23%
EXAMPLE 3
[0068] Four 84 mm cigarettes were prepared with the same tobacco
blend. These cigarettes had both a 63 mm tobacco rod attached to a
21 mm filter by a tipping paper. The filters were cut from the same
filter rod and the tipping papers were cut from the same reel. The
tobacco rod of cigarette E was wrapped in a wrapping paper (paper
C) with no burn-suppressing regions, which was used as a taste
benchmark for the wrapping papers of the tobacco rods of cigarettes
F, G and H (papers D, E and F, respectively) that do contain
burn-suppressing regions. Wrapping papers D, E and F only differ
from wrapping paper C in the presence of burn-suppressing regions
and differ amongst each other in the diffusion capacity of the
burn-suppressing regions. In wrapping papers D, E and F the
burn-suppressing regions were 6 mm wide annular bands separated
between them by 18 mm in a construction like the one depicted in
FIG. 2. The specifications of the respective wrapping papers are
indicated in Table 4 below.
[0069] These cigarettes were measured under ISO 3308:2012
conditions to determine their TNCO levels as well as their
respective puff counts. Self-extinguishment was also measured for
these cigarettes, both when positioned on a surface (ISO
12863:2010--referred to as LIP) and when burning in free air (ISO
12863:2010--referred to as FASE). The results are shown in Table 5
below. It was found that wrapping paper F continues to show a high
self-extinguishing rate when positioned on a surface and a
significantly improved performance when burning in free air when
compared to wrapping papers D and E, while maintaining very similar
TNCO levels to wrapping paper C.
TABLE-US-00004 TABLE 4 Paper C Paper D Paper E Paper F Basis weight
24 g/m.sup.2 24 g/m.sup.2 24 g/m.sup.2 24 g/m.sup.2 Porosity 45 CU
45 CU 45 CU 45 CU Diffusion capacity in the burn- N/A 0.04 cm/s
0.09 cm/s 0.28 cm/s suppressing regions Diffusion capacity in the
non-burn- 1.67 cm/s 1.67 cm/s 1.67 cm/s 1.67 cm/s suppressing
regions (base paper diffusion capacity) Burning additive type
Citrate salt Citrate salt Citrate salt Citrate salt Burning
additive amount 0.5 wt.-% 0.5 wt.-% 0.5 wt.-% 0.5 wt.-% Filler
(calcium carbonate) 20 wt.-% 20 wt.-% 20 wt.-% 20 wt.-%
TABLE-US-00005 TABLE 5 Cigarette E Cigarette F Cigarette G
Cigarette H Tar 8.4 9.1 9.2 8.9 Nicotine 0.7 0.7 0.8 0.7 CO 8.3
10.3 10.1 9.5 LIP 20% 100% 100% 85% FASE 0% 90% 65% 10%
[0070] A blind smoking test conducted with a panel of experts was
used to evaluate the impact on taste. Each panelist received three
reference cigarettes (cigarette E), and three test cigarettes, one
of each type (F, G, H), grouped in pairs so that each pair would
contain a reference cigarette and a test cigarette. The panelists
smoked the pairs of cigarettes consecutively, and then indicated
which of the test cigarettes was closer in taste to the reference
cigarette. The smoking test concluded that cigarette H was closer
in taste to reference cigarette E.
Example 4
[0071] Four 84 mm cigarettes were prepared with the same tobacco
blend. These cigarettes had both a 63 mm tobacco rod attached to a
21 mm filter by a tipping paper. The filters were cut from the same
filter rod and the tipping papers were cut from the same reel. The
tobacco rod of cigarette I was wrapped in a wrapping paper (paper
G) with no burn-suppressing regions, which was used as a taste
benchmark for the wrapping papers of the tobacco rods of cigarettes
J, K and L (papers H, I and J, respectively) that do contain
burn-suppressing regions. Wrapping papers H, I and J only differ
from wrapping paper G in the presence of burn-suppressing regions
and differ amongst each other in the diffusion capacity of the
burn-suppressing regions. In wrapping papers H, I and J the
burn-suppressing regions were 6 mm is wide annular bands separated
between them by 18 mm in a construction similar to the one depicted
in FIG. 2. The specifications of the respective wrapping papers are
indicated in Table 6 below.
TABLE-US-00006 TABLE 6 Paper G Paper H Paper I Paper J Basis weight
24 g/m.sup.2 24 g/m.sup.2 24 g/m.sup.2 24 g/m.sup.2 Porosity 45 CU
45 CU 45 CU 45 CU Diffusion capacity in the burn- N/A 0.04 cm/s
0.11 cm/s 0.18 cm/s suppressing regions Diffusion capacity in the
non-burn- 1.95 cm/s 1.95 cm/s 1.95 cm/s 1.95 cm/s suppressing
regions (base paper diffusion capacity) Burning additive type
Citrate salt Citrate salt Citrate salt Citrate salt Burning
additive amount 0.5 wt.-% 0.5 wt.-% 0.5 wt.-% 0.5 wt.-% Filler
(calcium carbonate) 20 wt.-% 20 wt.-% 20 wt.-% 20 wt.-%
[0072] These cigarettes were measured under ISO 3308:2012
conditions to determine their TNCO levels as well as their
respective puff counts. Self-extinguishment was also measured for
these cigarettes, both when positioned on a surface (ISO
12863:2010--referred to as LIP) and when burning in free air (ISO
12863:2010--referred to as FASE). The results are shown in Table 7
below. It was found that wrapping paper J continues to show a high
self-extinguishing rate when positioned on a surface and a
significantly improved performance when burning in free air when
compared to wrapping papers H and I, while maintaining very similar
TNCO levels to wrapping paper G.
TABLE-US-00007 TABLE 7 Cigarette I Cigarette J Cigarette K
Cigarette L Tar 8.0 9.3 9.6 8.9 Nicotine 0.7 0.8 0.7 0.7 CO 8.4
11.2 10.5 10.3 LIP 20% 100% 100% 95% FASE 5% 95% 75% 40%
[0073] A blind smoking conducted with a panel of experts as in
example 3 showed that cigarette L was closer in taste to reference
cigarette I.
* * * * *