Technical Field
[0001] The present disclosure relates to a cooling filter and a smoking article including
the same.
Background Art
[0002] A heating type stick article is needed to be heated using a dedicated device to express
a smoke flavor of a medium portion (including a smoke flavor and aerosol generating
articles containing tobacco raw materials such as cuts and the like and fragrance).
In the dedicated device for the heating type stick that has been developed so far
to express the smoke flavor, a temperature program is designed to perform high-temperature
heating considering thermal transfer to the inside of the medium portion. A heating
temperature is usually approximately between 200°C and 400°C and a large amount of
water vapor is generated when the stick of the medium portion is heated through the
device, unlike traditional cigarettes which burn the cuts for the inhalation. A temperature
inside the medium portion expressed through the heating is approximately between 100°C
to 200°C. A temperature of an airflow generated inside the medium portion is also
similar, and a smoker may inhale the hot heat, if there is no cooling material downstream
of the medium portion.
[0003] Accordingly, there is research being actively conducted to develop a cooling material
capable of improving economy and function of a new heating type stick.
Prior Art Document
Patent Document
Disclosure of the Invention
Technical Goals
[0005] In order to solve the aforementioned problems, the present disclosure provides a
cooling filter that has an excellent cooling effect due to phase transition and is
easily decomposed at the time of disposal.
[0006] The present disclosure provides a smoking article including the cooling filter according
to the present disclosure.
[0007] However, aspects to be achieved in the present disclosure are not limited to the
above-described aspects, and other aspects not mentioned herein may be clearly understood
by a person having ordinary skill in the art to which the present disclosure pertains
from the following description.
Technical Solutions
[0008] According to an embodiment of the present disclosure, there is provided a cooling
filter including a coating layer, in which the coating layer contains alkaline metal
chloride.
[0009] According to an embodiment of the present disclosure, the coating layer may have
a basis weight of 1% to 30% of a basis weight of the filter and contain alkaline metal
chloride.
[0010] According to an embodiment of the present disclosure, the alkaline metal chloride
may be one or more kinds selected from a group consisting of sodium chloride, potassium
chloride, and lithium chloride.
[0011] According to an embodiment of the present disclosure, the coating layer may further
include one or more kinds selected from a group consisting of cellulose, a cellulose
derivative, an alcohol resin, and sugars.
[0012] According to an embodiment of the present disclosure, the cellulose derivative may
be one or more kinds selected from a group consisting of methyl cellulose, ethyl cellulose,
carboxymethyl cellulose, carboxyethyl cellulose, hydroxymethyl cellulose, hydroxyethyl
cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, hydroxyethylmethyl
cellulose, and agar.
[0013] According to an embodiment of the present disclosure, the alcohol resin may be polyvinyl
alcohol.
[0014] According to an embodiment of the present disclosure, the sugars may be one or more
kinds selected from a group consisting of sugar alcohol, monosaccharide, disaccharide,
oligosaccharide, and polysaccharide.
[0015] According to an embodiment of the present disclosure, the cellulose, cellulose derivative,
alcohol resin, or sugars may be coated with a basis weight of 0.1% to 15% of a basis
weight of the filter.
[0016] According to an embodiment of the present disclosure, the filter may have a tubular
shape with a hollow formed inside and the coating layer may be formed on a surface
of the hollow.
[0017] According to an embodiment of the present disclosure, the filter may include one
or more materials selected from a group consisting of paper, a polymer, and cellulose
acetate.
[0018] According to an embodiment of the present disclosure, the cooling filter may have
a length of 5 millimeters (mm) or more and a circumference of 14 to 27 mm.
[0019] According to an embodiment of the present disclosure, the cooling filter may have
draw resistance of 0.1 to 3.5 mmH2O per millimeter.
[0020] According to an embodiment of the present disclosure, there is provided a smoking
article including a smoking material portion; a cooling portion including a cooling
filter according to the present disclosure positioned downstream of the smoking material
portion; and a mouthpiece portion positioned downstream of the cooling portion.
[0021] According to an embodiment of the present disclosure, the smoking article is heating
type tobacco and may be in the form of a cigarette.
Effects
[0022] According to the present disclosure, the cooling filter coated with a material having
endothermic and hygroscopic properties is inserted to a downstream portion of the
smoking material portion of the smoking article, thereby providing a smoking article
having an effective cooling function and improved tobacco taste and long-lasting smoke
flavor.
Brief Description of Drawings
[0023]
FIG. 1 illustrates an example of a cooling filter according to the present disclosure,
according to an embodiment of the present disclosure.
FIG. 2 illustrates an example of a smoking article to which the cooling filter according
to the present disclosure is applied, according to another embodiment of the present
disclosure.
FIG. 3 illustrates a result of confirming a cooling effect of cooling filters according
to examples and comparative example of the present disclosure.
Best Mode for Carrying Out the Invention
[0024] Hereinafter, embodiments of the present disclosure will be described in detail with
reference to the accompanying drawings. When it is determined detailed description
related to a related known function or configuration they may make the purpose of
the present disclosure unnecessarily ambiguous in describing the present disclosure,
the detailed description will be omitted here. In addition, terminologies used herein
are defined to appropriately describe the embodiments and thus may be changed depending
on a user, the intent of an operator, or a custom of a field to which the present
disclosure pertains. Accordingly, the terminologies must be defined based on the following
overall description of the present specification. In the drawings, like reference
numerals are used for like elements.
[0025] In the whole specification, when a member is positioned "on" another member, this
not only includes a case that the any member is brought into contact with the other
member, but also includes a case that another member exists between two members.
[0026] It will be understood that when a certain part "includes" a certain component, the
part does not exclude another component but may further include another component.
[0027] Throughout the specification, when a user inhales the external air by using a smoking
article, a portion where the air flows to the inside from the outside of the smoking
article is referred to as an "upstream" portion and a portion where the air flows
out to the outside from the inside of the smoking article including a combustible
heat source is referred to as a "downstream" portion. The terms "upstream" and "downstream"
may be used to indicate a relative position or orientation between portions or segments
constituting the smoking article.
[0028] Hereinafter, a cooling filter and a smoking article including the cooling filter
according to the present disclosure will be described in detail with reference to
embodiments and drawings. However, the present disclosure is not limited to the embodiments
and drawings.
[0029] In the present disclosure, in a cooling filter 120, the filter may include a coating
layer and the coating layer contains an alkaline metal chloride.
[0030] As shown in FIG. 1, the cooling filter 120 of the present disclosure may have a tubular
shape with a hollow 120H formed inside. The coating layer is formed on a surface of
the hollow inside thereof, that is, a flow path through which gas introduced from
an upstream side passes.
[0031] According to an embodiment of the present disclosure, the coating layer has a basis
weight of 1% to 30% of a basis weight of the filter and contains alkaline metal chloride.
As the surface of the hollow inside the filter is coated with the alkaline metal chloride,
the alkaline metal chloride may dissolve by moisture generated at the time of heating
the smoking article and cause an endothermic reaction which may provide an airflow
cooling effect. In addition, since the alkaline metal chloride is a material that
may be easily decomposed into soil, the cooling filter may be used as an environment-friendly
product.
[0032] According to an embodiment of the present disclosure, the alkaline metal chloride
may be one or more kinds selected from a group consisting of sodium chloride, potassium
chloride, and lithium chloride. As the alkaline metal chloride, sodium chloride is
desirably used. The sodium chloride has a property advantageous to lower a temperature
of a mainstream smoke due to occurrence of an endothermic reaction due to moisture
absorption, as the sodium chloride may absorb moisture contained in the airflow at
the time of smoking.
[0033] According to an embodiment of the present disclosure, the coating layer may further
include one or more kinds selected from a group consisting of cellulose, a cellulose
derivative, an alcohol resin, and sugars, the cellulose derivative may be one or more
kinds selected from a group consisting of methyl cellulose, ethyl cellulose, carboxymethyl
cellulose, carboxyethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose,
hydroxypropyl cellulose, hydroxypropylmethyl cellulose, hydroxyethylmethyl cellulose,
and agar, and the alcohol resin may be polyvinyl alcohol, but these are not limited
thereto. The sugars may be one or more kinds selected from a group consisting of sugar
alcohol, monosaccharide, disaccharide, oligosaccharide, and polysaccharide but are
not limited thereto. The sugar alcohol may be sorbitol, xylitol, mannitol, maltitol,
or lactitol, the monosaccharide may be fructose, glucose, or galactose, the disaccharide
may be sucrose, lactose, or maltose, and the polysaccharide may be starch, dietary
fibers, or glycogen.
[0034] In the cellulose, cellulose derivative, alcohol resin, or sugars, the phase transition
occurs at a temperature level of the airflow generated at the time of smoking, which
enables the endothermic reaction. Accordingly, when the materials described above
are used in addition to alkaline metal chloride, the cooling effect may be further
improved.
[0035] According to an embodiment of the present disclosure, the cellulose, cellulose derivative,
alcohol resin, or sugars may be coated with a basis weight of 1% to 15% of a basis
weight of the filter and desirably coated with a basis weight of 0.5% to 1.5%. When
the basis weight is included in the above range, the cooling effect may be further
improved.
[0036] The cooling filter 120 may be made of a material such as paper, polymer, or cellulose
acetate. The material may be desirably paper but is not limited thereto. The cooling
filter may be changed in shape, thickness, length, and the like depending on the applied
smoking article, and may desirably have a length of 5 mm or more and a circumference
of 14 to 27 mm. When the above length and circumference are obtained, there is no
effect on a smoke flavor of the smoking while effectively lowering a temperature of
gas generated due to the heating of a smoking material.
[0037] According to an embodiment of the present disclosure, the material of the cooling
filter may be paper and may include, specifically, a paper tube. The paper used for
the paper tube may have a basis weight of 10 to 500 g/m
2, but is not limited thereto. The paper may more desirably have a basis weight of
30 to 300 g/m
2.
[0038] According to an embodiment of the present disclosure, the cooling filter may have
draw resistance of 0.1 to 3.5 mm H
2O per millimeter. As the draw resistance in the above range is obtained, the smoking
article of the present disclosure has an excellent effect in sucking property.
[0039] The present disclosure relates to a smoking article including the cooling filter
according to the present disclosure. As used herein, the "smoking article" refers
to a cigarette, a tobacco derivative, expanded tobacco, reconstituted tobacco, any
product that may be used for smoking regardless whether it is based on a tobacco substitute,
or any product capable of providing a smoking experience. Particularly, in the present
disclosure, the smoking article may refer to a smokable product capable of generating
an aerosol such as a heating type electronic cigarette.
[0040] According to an embodiment of the present disclosure, the smoking article 100 may
include a smoking material portion 110; a cooling portion including the cooling filter
120 according to the present disclosure positioned downstream of the smoking material
portion; and a mouthpiece portion 130 positioned downstream of the cooling portion.
[0041] The smoking material portion 110; the cooling portion including the cooling hollow
filter 120; and the mouthpiece portion 130 may be connected in a longitudinal direction.
That is, the mouthpiece portion 130 may be positioned at a most downstream side of
the smoking material portion 110, that is, in a direction closest to a smoker, and
the smoking material portion may be positioned on a most upstream side, that is, a
direction (an upstream direction) farthest from the smoker.
[0042] Referring to FIG. 2, the smoking article is a smoking article including a hollow
filter in the cooling portion. The configuration of the cooling portion including
only the hollow filter according to the present disclosure as described above is merely
an example, and the cooling portion may further include other cooling elements other
than the hollow filter.
[0043] According to an embodiment of the present disclosure, the smoking article includes
an aerosol generating material. The aerosol generating material refers to a material
capable of generating an aerosol and may be in a solid or liquid state.
[0044] For example, a solid aerosol generating material may include a solid substance based
on tobacco raw materials such as plate-shaped leaf tobacco, cut tobacco, or reconstituted
tobacco, and a liquid aerosol generating substrate may include a liquid composition
based on nicotine, tobacco extracts, and/or various flavoring agents. However, the
scope of the present disclosure is not limited to the examples listed above.
[0045] The liquid aerosol generating material may include, as more specific examples, at
least one of propylene glycol (PG) or glycerin (GLY) and may further include at least
one of ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol,
tetraethylene glycol, or oleyl alcohol. In another example, the aerosol generating
material may further include at least one of nicotine, moisture, or a flavoring material.
In still another example, the aerosol generating material may further include various
additives such as cinnamon, capsaicin, or the like. The aerosol generating material
may contain, not only a liquid material having a high fluidity, but a material in
the form of gel or solid. As described above, composition components of the aerosol
generating material may be variously selected according to the embodiments and a composition
ratio thereof may also vary according to the embodiments. Hereinafter, the liquid
may refer to a liquid aerosol generating material.
[0046] According to an embodiment of the present disclosure, the smoking material portion
may include the solid aerosol generating material or may include both the solid aerosol
generating material and the liquid aerosol generating material. A length of the smoking
material portion may be approximately 15 mm to 75 mm.
[0047] The smoking material portion may have a structure wrapped by a thermally conductive
wrapper. The thermally conductive wrapper transfers heat generated from a combustible
heat source to the tobacco material. The wrapper may be a metal foil wrapper such
as an aluminum foil wrapper, a steel wrapper, an iron foil wrapper, and a copper foil
wrapper; and a metal alloy foil wrapper, and the material thereof is not limited to
the above materials, as long as it is a material capable of efficiently transferring
heat.
[0048] The smoking material portion and the cooling portion may be wrapped by external cigarette
paper. For example, it may be formed of paper or cellulose wrapping paper. However,
the present disclosure is not limited thereto.
[0049] According to an embodiment of the present disclosure, the smoking article includes
a mouthpiece portion. For example, the mouthpiece portion may be a mono filter, double
filter, or triple filter. In addition, the mouthpiece portion may include at least
one of filters having a porous matrix structure, tube structure, and paper tube structure.
The filter may include a fibrous or filamentous filter tow containing at least one
of a polymer, paper, cellulose acetate, activated carbon, and carbon, or a filter
tow containing both. However, the embodiment is not limited thereto. In some embodiments,
the material of the filter may further include at least one filter material widely
known in the technical field, such as a carbon-containing adsorbent or activated carbon.
Also, the mouthpiece portion may further include tip paper and/or filter wrapping
paper for wrapping the filter and the tip paper and the filter wrapping paper may
be, for example, a paper material, but are not limited thereto.
[0050] Hereinafter, embodiments will be described in detail with reference to the accompanying
drawings. However, various alterations and modifications may be made to the embodiments.
Here, the embodiments are not construed as limited to the disclosure. The embodiments
should be understood to include all changes, equivalents, and replacements within
the idea and the technical scope of the disclosure.
[0051] Unless otherwise defined, all terms including technical and scientific terms used
herein have the same meaning as commonly understood by one of ordinary skill in the
art to which embodiments belong. It will be further understood that terms, such as
those defined in commonly-used dictionaries, should be interpreted as having a meaning
that is consistent with their meaning in the context of the relevant art and will
not be interpreted in an idealized or overly formal sense unless expressly so defined
herein.
[Examples]
Example 1
[0052] A heating type cigarette having a structure of a smoking material portion, a hollow
filter, and a mouthpiece portion, as the smoking article 100 shown in FIG. 2, prepared
for a test for the examples was used, and a paper tube filter having an inner portion
coated with 1% of polyvinyl alcohol was used as the hollow filter. As for the mouthpiece,
a transfer jet nozzle system (TINS) filter flavored with approximately 6 mg of menthol
was used.
Example 2
[0053] A heating type cigarette which is the same as that of Example 1 was prepared, except
that a paper tube filter having an inner portion coated with 1% of carboxymethyl cellulose
was used as the hollow filter.
Example 3
[0054] A heating type cigarette which is the same as that of Example 1 was prepared, except
that a paper tube filter having an inner portion coated with 9% of sodium chloride
was used as the hollow filter.
Example 4
[0055] A heating type cigarette which is the same as that of Example 1 was prepared, except
that a paper tube filter having an inner portion coated with 1% of sodium chloride
was used as the hollow filter.
Example 5
[0056] A heating type cigarette which is the same as that of Example 1 was prepared, except
that a paper tube filter having an inner portion coated with 6% of sodium chloride
was used as the hollow filter.
Example 6
[0057] A heating type cigarette which is the same as that of Example 1 was prepared, except
that a paper tube filter having an inner portion coated with 15% of sodium chloride
was used as the hollow filter.
Comparative Example 1
[0058] A heating type cigarette which is the same as that of Example 1 was prepared, except
that a paper tube filter having an uncoated inner portion was used as the hollow filter.
<Confirmation of Cooling Effect>
[0059] In order to confirm the cooling effect of the heating type cigarettes prepared in
the examples and comparative example described above, a maximum temperature of a mainstream
smoke during puffing was measured and shown in Table 1 and FIG. 3 below.
[Table 1]
Maximum temperature level per puff (°C) |
Number of puffs |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
Comparativ e Example 1 |
76.5 |
65.6 |
58.8 |
55.6 |
52.3 |
49.3 |
46 |
41.9 |
39.4 |
36.6 |
34.2 |
32.9 |
Example 1 |
65.4 |
57.2 |
50.8 |
48.4 |
46.7 |
44.4 |
42.4 |
40.9 |
39.4 |
38.6 |
38.1 |
37.6 |
Example 2 |
64.5 |
56.2 |
50.9 |
47.8 |
45.2 |
43.1 |
40.6 |
38.6 |
37.9 |
37.5 |
36.7 |
36.4 |
Example 3 |
65 |
55.6 |
49.7 |
45.3 |
43.7 |
41.8 |
39.7 |
37.8 |
36.8 |
36 |
35.2 |
34.7 |
Example 4 |
73.1 |
65.9 |
55.7 |
51.6 |
48.4 |
44.7 |
42 |
39.9 |
38.1 |
36.4 |
35 |
33.6 |
Example 5 |
70.2 |
61.7 |
55.3 |
51.8 |
48.6 |
44.7 |
41.2 |
38 |
35.2 |
33.6 |
32.8 |
32.4 |
Example 6 |
61 |
53.5 |
47.9 |
45.3 |
43.7 |
41.8 |
39.7 |
37.8 |
36.8 |
36 |
35.2 |
34.7 |
[0060] As a result, in Examples 1 to 6 in which the coated paper tubes were used, a significant
effect of lowering an initial temperature was observed. Particularly, in Examples
3 to 6 in which the sodium chloride coating was used, a particularly excellent effect
of lowering the temperature was observed.
<Observation of Sensory Characteristics>
[0061] In order to confirm Comparative Example 1 and the sensory characteristics according
to a concentration of sodium chloride that is perceived to have an excellent cooling
effect, the sensory evaluation was performed regarding thermal sensation during initial
puffs, amount of aerosol, amount of atomization, and sucking property according to
Comparative Example 1 and Examples 3 to 6 and results thereof were shown in Table
2. The sensory evaluation was performed on an evaluation panel of 25 members using
respective cigarettes of Examples 2 weeks after manufacture, based on a total score
of 5 points.
[Table 2]
Evaluation sample |
Hotness during initial puffs (1 to 3 puffs) |
Amount of atomization |
Sucking property |
Comparative Example 1 |
5.0 |
5.0 |
4.9 |
Example 3 (sodium chloride 9%) |
3.0 |
5.0 |
4.8 |
Example 4 (sodium chloride 1%) |
4.7 |
5.0 |
5.0 |
Example 5 (sodium chloride 6%) |
4.8 |
4.9 |
5.0 |
Example 6 (sodium chloride 15%) |
2.7 |
4.8 |
5.0 |
[0062] From the results described above, it was found that the examples showed the amount
of atomization and sucking property that are not different from or at a similar level
as those of the uncoated paper tube, and as the content of sodium chloride increases,
the hotness during the initial puffs significantly decreases.
[0063] A number of embodiments have been described above. Nevertheless, it should be understood
that various modifications may be made to these embodiments. For example, suitable
results may be achieved if the described techniques are performed in a different order
and/or if components in a described system, architecture, device, or circuit are combined
in a different manner and/or replaced or supplemented by other components or their
equivalents. Therefore, other implementations, other embodiments, and equivalents
to the claims are also within the scope of the following claims.
Explanation of Reference numerals
[0064]
100: Smoking article
110: Smoking material portion
120: Cooling filter
120H: Hollow
130: Mouthpiece portion
1. A cooling filter comprising:
a coating layer,
wherein the coating layer comprises alkaline metal chloride.
2. The cooling filter of claim 1, wherein the coating layer has a basis weight of 1%
to 30% of a basis weight of the filter and contains alkaline metal chloride.
3. The cooling filter of claim 1, wherein the alkaline metal chloride is one or more
kinds selected from a group consisting of sodium chloride, potassium chloride, and
lithium chloride.
4. The cooling filter of claim 1, wherein the filter has a tubular shape with a hollow
formed inside and the coating layer is formed on a surface of the hollow.
5. The cooling filter of claim 1, wherein the coating layer further comprises one or
more kinds selected from a group consisting of cellulose, a cellulose derivative,
an alcohol resin, and sugars.
6. The cooling filter of claim 5, wherein the cellulose derivative is one or more kinds
selected from a group consisting of methyl cellulose, ethyl cellulose, carboxymethyl
cellulose, carboxyethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose,
hydroxypropyl cellulose, hydroxypropylmethyl cellulose, hydroxyethylmethyl cellulose,
and agar.
7. The cooling filter of claim 5, wherein the alcohol resin is polyvinyl alcohol.
8. The cooling filter of claim 5, wherein the cellulose, cellulose derivative, alcohol
resin, or sugars is coated in a content of 0.1% to 15% of a basis weight of the filter.
9. The cooling filter of claim 1, wherein the filter comprises one or more materials
selected from a group consisting of paper, a polymer, and cellulose acetate.
10. The cooling filter of claim 1, wherein the cooling filter has a length of 5 millimeters
(mm) or more and a circumference of 14 to 27 mm.
11. The cooling filter of claim 1, wherein the cooling filter has draw resistance of 0.1
to 3.5 mm H2O per millimeter.
12. A smoking article comprising:
a smoking material portion;
a cooling portion comprising the cooling filter of claim 1 positioned downstream of
the smoking material portion; and
a mouthpiece portion positioned downstream of the cooling portion.
13. The smoking article of claim 12, wherein the smoking article is heating type tobacco
and is in the form of a cigarette.