Filter for smoking article and smoking article comprising same

Abstract

Provided are a filter for a smoking article and a smoking article comprising same. The filter for a smoking article comprises: a regenerated cellulose tow including regenerated cellulose-based fibers; and a filter portion including a monomolecular additive dispersed in the regenerated cellulose tow.

Description

Filters for smoking articles, and smoking articles containing the same

[0001] The present invention relates to a filter for a smoking article comprising regenerated cellulose tow (preferably lyocell tow and / or viscose tow) and a monomolecular additive dispersed in the regenerated cellulose tow (preferably lyocell tow and / or viscose tow) as a phenol-reducing material, and to a smoking article comprising the same.

[0002]

[0003] With growing concern for environmental protection, biodegradability is also becoming increasingly important for materials used in cigarette filters. In particular, existing cellulose acetate-based cigarette filters suffer from the problem of taking a long time to decompose naturally, leading to active research into biodegradable materials to replace them.

[0004] In response to these demands, efforts to use regenerated cellulose fibers, such as lyocell, which boast excellent biodegradability, as filter materials are attracting attention. Regenerated cellulose fibers, such as lyocell, are manufactured from cellulose and are known as environmentally friendly materials that decompose quickly under various conditions, including marine environments.

[0005] Meanwhile, phenolic compounds, one of the harmful substances produced during smoking, can have a negative impact not only on the user's health but also on the environment. Therefore, technologies that effectively reduce these compounds within filters are also required. Accordingly, technologies that incorporate polymer additives such as triethyl citrate (TEC), triacetin (TA), and polyethylene glycol (PEG) into cigarette filters have been proposed to reduce phenolic compounds.

[0006] However, when an additive containing at least one of triethyl citrate (TEC) and triacetin (TA) was applied to regenerated cellulose tow including regenerated cellulose fibers such as lyocell tow including lyocell fibers and viscose tow including viscose fibers as a phenol-reducing material, a problem of ink spreading of the tip paper occurred. This was confirmed to occur because the additive is hydrophobic, but regenerated cellulose fibers such as lyocell fibers and viscose fibers are hydrophilic, making it difficult for the additive to exist between the fibers and leaking to the external tip paper side.

[0007] When polyethylene glycol (PEG) is applied to regenerated cellulose tow, which includes regenerated cellulose fibers, such as lyocell tow, which includes lyocell fibers, as a phenol-reducing material, polyethylene glycol (PEG) is an amphoteric additive, and has excellent phenol-reducing performance in mainstream smoke and does not cause ink to spread. However, it is classified as a synthetic polymer under the standards of the European Chemicals Agency (ECHA), and there is a concern that regenerated cellulose filters, such as lyocell filters, to which polyethylene glycol (PEG) is added may be classified as disposable plastic products.

[0008] Therefore, if synthetic polymers are applied to regenerated cellulose filters such as lyocell filters and they are classified as disposable plastic products, this may be disadvantageous in terms of biodegradability certification and regulatory compliance, and may negatively impact the biodegradability suitability of the filter product. Therefore, there is a growing need for a new additive that can be applied to regenerated cellulose tows such as lyocell tow and viscose tow, which are not classified as disposable plastic products, without causing ink bleeding issues on tip paper or impairing the biodegradability of the filter, while maintaining phenol reduction performance.

[0009]

[0010] The problem to be solved by the present invention is to provide a filter for a smoking article and a smoking article including the same, which can minimize the possibility of being classified as a disposable plastic product while maintaining excellent phenol reduction performance and nicotine transfer amount by including a single-molecule additive instead of a high-molecular additive as a phenol reduction material, and at the same time, minimize ink spreading of tip paper.

[0011] The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from the description below.

[0012]

[0013] According to one embodiment of the present invention, a filter for a smoking article for solving the above problem comprises a filter part comprising regenerated cellulose tow including regenerated cellulose fibers, and a single-molecule additive dispersed in the regenerated cellulose tow.

[0014] In some embodiments, the regenerated cellulose fibers may include at least one of viscose fibers and lyocell fibers.

[0015] In some embodiments, the regenerated cellulose fibers comprise lyocell fibers, and the regenerated cellulose tow may be lyocell tow.

[0016] In some embodiments, the lyocell tow may be characterized as consisting solely of the lyocell fibers as fibers.

[0017] In some embodiments, the single molecule additive may be characterized as a phenol-reducing material.

[0018] In some embodiments, the single molecule additive may be characterized as being a polyhydric alcohol.

[0019] In some embodiments, the single molecule additive may be characterized as an oligomer comprising two or more repeating polyhydric alcohols of the same structure, or an ether derivative of the oligomer.

[0020] In some embodiments, the polyhydric alcohol may be characterized as being one of ethylene glycol (EG) and propylene glycol (PG).

[0021] In some embodiments, the single molecule additive may include one or more selected from the group consisting of ethylene glycol oligomers, ethylene glycol oligomer ether derivatives which are ether derivatives of the ethylene glycol oligomers, propylene glycol oligomers, or propylene glycol oligomer ether derivatives which are ether derivatives of the propylene glycol oligomers.

[0022] In some embodiments, the single molecule additive may include at least one of diethylene glycol (DEG), triethylene glycol (TEG), tetraethylene glycol (TetraEG), and pentaethylene glycol (PentaEG) as the ethylene glycol oligomer.

[0023] In some embodiments, the single molecule additive may include at least one of dipropylene glycol (DPG), tripropylene glycol (TPG), tetrapropylene glycol (TetraEG), and pentapropylene glycol (PentaEG) as the propylene glycol oligomer.

[0024] In some embodiments, the single molecule additive may include at least one of triethylene glycol (TEG), tetraethylene glycol (TetraEG), and tripropylene glycol (TPG).

[0025] In some embodiments, the single molecule additive may be triethylene glycol.

[0026] In some embodiments, the single molecule additive may be tetraethylene glycol.

[0027] In some embodiments, the single molecule additive may be dipropylene glycol.

[0028] In some embodiments, the single molecule additive may be tripropylene glycol.

[0029] In some embodiments, the single molecule additive may be dipropylene glycol monomethyl ether.

[0030] In some embodiments, the single molecule additive may be tripropylene glycol butyl ether.

[0031] In some embodiments, the filter member further comprises a filter member wrapper surrounding the filter member, wherein the filter member wrapper may comprise a porous general paper.

[0032] According to one embodiment of the present invention for solving the above-described other problem, a smoking article comprises a smoking material portion, a filter for a smoking article disposed downstream of the smoking material portion, and a tip paper wrapping at least a portion of the smoking material portion and the filter for a smoking article, wherein the filter for a smoking article comprises a filter portion comprising regenerated cellulose tow including regenerated cellulose fibers, and a monomolecular additive dispersed in the regenerated cellulose tow, and a filter portion wrapper wrapping the filter portion.

[0033] In some embodiments, the regenerated cellulose tow may be a lyocell tow comprising a plurality of lyocell fibers.

[0034] In some embodiments, the regenerated cellulose tow may be a viscose tow comprising a plurality of viscose fibers.

[0035] In some embodiments, the regenerated cellulose tow may include a lyocell tow comprising a plurality of lyocell fibers and a viscose tow comprising a plurality of viscose fibers.

[0036] In some embodiments, the single molecule additive may be characterized as a phenol-reducing material.

[0037] In some embodiments, the single molecule additive may include one or more selected from the group consisting of ethylene glycol oligomers, ethylene glycol oligomer ether derivatives which are ether derivatives of the ethylene glycol oligomers, propylene glycol oligomers, or propylene glycol oligomer ether derivatives which are ether derivatives of the propylene glycol oligomers.

[0038]

[0039] According to a filter for a smoking article and a smoking article according to one embodiment, the filter part of the filter for a smoking article includes regenerated cellulose tow including regenerated cellulose fibers having excellent biodegradability, and by adding a single-molecular additive as a phenol-reducing material to the regenerated cellulose tow, excellent phenol reduction performance and nicotine transfer amount are provided, but by adding a single-molecular material rather than a polymer material (or a high-molecular polymer), the possibility of being classified as a disposable plastic product is minimized, and ink spreading of tip paper can be minimized.

[0040] The effects according to the technical idea of ​​the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

[0041]

[0042] FIG. 1 is a drawing showing a schematic configuration of a smoking article according to one embodiment of the present invention.

[0043] Figure 2 is an image taken over a period of time to check whether ink spreads on a filter for a smoking article according to Example 1 of the present invention.

[0044] Figure 3 is an image taken over a period of time to check whether ink spreads on a filter for a smoking article according to Example 4 of the present invention.

[0045] Figure 4 is an image taken to check whether ink is spreading in a filter for a smoking article according to Example 6 of the present invention.

[0046] Figure 5 is an image taken over a period of time to check whether ink spreads on a filter for a smoking article of Comparative Example 5 of the present invention.

[0047] Figure 6 is an image taken over a period of time to check whether ink spreads on a filter for a smoking article of Comparative Example 6 of the present invention.

[0048]

[0049] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the attached drawings. The advantages and features of the present disclosure, and methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the attached drawings. However, the technical idea of ​​the present disclosure is not limited to the following embodiments and may be implemented in various different forms. The following embodiments are provided only to complete the technical idea of ​​the present disclosure and to fully inform those skilled in the art of the present disclosure of the scope of the present disclosure, and the technical idea of ​​the present disclosure is defined only by the scope of the claims.

[0050] When assigning reference numerals to components in each drawing, it should be noted that identical components are assigned the same numerals whenever possible, even if they appear on different drawings. Furthermore, when describing the present disclosure, if a detailed description of a related known configuration or function is deemed likely to obscure the gist of the present disclosure, such detailed description will be omitted.

[0051] Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used in the same sense as commonly understood by those of ordinary skill in the art to which this disclosure pertains. Furthermore, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise. The terminology used herein is for the purpose of describing embodiments and is not intended to limit the disclosure. In this specification, singular forms also include plural forms, unless specifically stated otherwise.

[0052] Additionally, terms such as first, second, A, B, (a), (b), etc. may be used to describe components of the present disclosure. These terms are only intended to distinguish the components from other components, and the nature, order, or sequence of the components are not limited by the terms. When a component is described as being "connected," "coupled," or "connected" to another component, it should be understood that the component may be directly connected or connected to the other component, but another component may also be "connected," "coupled," or "connected" between each component.

[0053] As used herein, the terms “comprises” and / or “comprising” do not exclude the presence or addition of one or more other components, steps, operations, and / or elements.

[0054] First, let's clarify some terms used in this specification.

[0055] As used herein, the term "smoking article" may mean any smokeable product or any product capable of providing a smoking experience, whether based on tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco, or tobacco substitutes. For example, smoking articles may include smokeable products such as cigarettes, cigars, and cigarillos.

[0056] In this specification, “smoking material” may mean any type of material that can be used in smoking articles.

[0057] In this specification, the term “user” may be used interchangeably with “consumer.”

[0058] In this specification, “upstream” or “upstream direction” may mean a direction away from the smoker’s mouth, and “downstream” or “downstream direction” may mean a direction toward the smoker’s mouth.

[0059] As used herein, the term "longitudinal direction" may refer to a direction corresponding to the longitudinal axis of a smoking article. The "longitudinal axis" of a smoking article may refer to an imaginary line extending along the main longitudinal direction of the smoking article. This axis typically extends from one end of the smoking article (e.g., the mouthpiece or filter end) to the opposite end (e.g., the combustion or heat source end).

[0060] As used herein, “regenerated cellulose filter” refers to a filter comprising or consisting of regenerated cellulose tow.

[0061] As used herein, “lyocell filter” refers to a filter comprising or consisting of lyocell tow.

[0062] In this specification, “viscose filter” refers to a filter comprising viscose tow or composed of lyocell tow.

[0063] As used herein, “regenerated cellulose tow” includes or consists of a plurality of regenerated cellulose fibers. In some embodiments, regenerated cellulose tow may refer to a bundle formed by cross-linking adjacent regenerated cellulose fibers.

[0064] As used herein, “Lyocell tow” refers to a bundle comprising or consisting of a plurality of Lyocell fibers. In some embodiments, Lyocell tow may refer to a bundle formed by cross-linking adjacent Lyocell fibers.

[0065] As used herein, “viscose tow” refers to a bundle comprising or consisting of a plurality of viscose fibers. In some embodiments, viscose tow may refer to a bundle formed by cross-linking adjacent viscose fibers.

[0066] In this specification, “regenerated cellulose fiber” may mean a cellulose fiber formed by treating a naturally occurring cellulose material.

[0067] As used herein, “Lyocell fiber” may refer to a fiber made from lyocell cellulose. In particular, lyocell fiber and viscose fiber may be fibers made from cellulose derived from or primarily derived from wood pulp, particularly semi-synthetic fibers.

[0068] In this specification, the term "non-circular cross-section" is defined as a cross-section whose shape is not circular but includes a plurality of protrusions. For example, a cross-section having a shape in which a plurality of protrusions branch and / or extend from the center and / or the center of the cross-section may be referred to as a non-circular cross-section. Here, "protrusion" may mean a distinct and extended segment or arm extending outward from the central core or joint point of the cross-section of regenerated cellulose fibers (preferably, lyocell fibers and / or viscose fibers).

[0069] In some embodiments, the regenerated cellulose fibers (preferably lyocell fibers and / or viscose fibers) may have a Y-shaped cross-section with three protrusions branching and / or extending from the center and / or center of the cross-section, a cruciform cross-section with four protrusions, and / or a star-shaped cross-section with five or more protrusions, or may have an O-shaped cross-section, but are not limited thereto.

[0070] In some embodiments, the regenerated cellulose fibers (preferably lyocell fibers and / or viscose fibers) may include three or more protrusions branching and / or extending from the center and / or the center of the cross-section.

[0071] In some embodiments, the regenerated cellulose-based fibers (preferably lyocell fibers and / or viscose fibers) included in the regenerated cellulose-based fibers (preferably lyocell fibers and / or viscose fibers) may have a Y-shaped cross-section for purposes of application to cigarette filters.

[0072] In this specification, “hollow” may mean a channel extending along the longitudinal direction.

[0073] In this specification, "consisting of" an element may mean including or consisting of that element.

[0074] In the present specification, a wrapper (e.g., a roll) may surround at least a portion of the circumferential surface of the longitudinal axis of each part (part) and / or structure of the smoking article.

[0075] In this specification, "monomolecular additive" may mean a single compound, not a mixture, and a low molecular weight compound having a relatively small molecular weight rather than a high molecular weight polymer, for example, a low molecular weight compound having a molecular weight of less than 1000, preferably less than 800, more preferably less than 700, even more preferably less than 600, and even more preferably less than 500. The molecular weight may be a number average molecular weight.

[0076] In this specification, "basis weight" refers to the mass per unit area of ​​the paper and / or wrapper. The basis weight of the paper and / or wrapper can be determined by measuring the mass and area of ​​the paper and / or wrapper and dividing the mass of the paper and / or wrapper by the area. The unit of basis weight is gsm (gram per square meter), i.e. g / m 2 It could be.

[0077] In this specification, “hard paper” refers to paper having a basis weight greater than a certain value.

[0078] In some embodiments, “oil-resistant paper” may refer to paper having an oil-resistant treatment on the paper surface, and “oil-resistant hard paper” may refer to hard paper having an oil-resistant treatment on the paper surface.

[0079] In some embodiments, “general paper” may refer to paper whose surface has not been treated with an oil-resistant coating, and “general hard paper” may refer to hard paper whose surface has not been treated with an oil-resistant coating.

[0080] In the present specification, the “fineness” of regenerated cellulose tow (preferably, lyocell tow and / or viscose tow) means the fineness of a single strand of monofilament separated from a multifilament of regenerated cellulose-based fibers (preferably, lyocell fibers and / or viscose fibers) constituting the regenerated cellulose tow (preferably, lyocell tow and / or viscose tow).

[0081] In the present specification, the “total fineness” of the regenerated cellulose tow (preferably, lyocell tow and / or viscose tow) means the fineness of the multifilament of the regenerated cellulose fibers (preferably, lyocell fibers and / or viscose fibers) constituting the regenerated cellulose tow (preferably, lyocell tow and / or viscose tow).

[0082] In this specification, “phenols” means a substance in which some of the hydrogens attached to the functional group of the aromatic hydrocarbon ring are replaced with hydroxyl groups (-OH).

[0083] In some embodiments, the phenols may include a substance selected from the group consisting of phenol, m-cresol, p-cresol, o-cresol, catechol, hydroquinone, resorcinol, and combinations thereof.

[0084] In some embodiments, the phenols may include one or more of m-cresol, p-cresol, o-cresol, and phenol.

[0085] A filter for a smoking article can capture at least a portion of the smoke components generated when the smoking article is smoked. In some embodiments, the filter for a smoking article can capture at least a portion of the phenols contained in the smoke components generated when the smoking article is smoked.

[0086] A filter of a smoking article according to one aspect of the present invention can capture at least a portion of smoke components generated when smoking the smoking article. In some embodiments, the filter of the smoking article can capture one or more of nicotine (hereinafter abbreviated as “Nic”), phenol, and water (H2O) contained in the smoke components generated when smoking the smoking article.

[0087] In this specification, “pumping resistance” means the static pressure difference between the two ends of a sample when an airflow passes through the sample. For example, the pumping resistance can be measured using the method specified in ISO Standard 6565:2015. According to ISO Standard 6565:2015, the pumping resistance can mean the static pressure difference between the two ends of a sample when it is passed through by an airflow under normal conditions (22±2℃, 60±5% relative humidity) with a volumetric flow rate of 17.5 mm / s at the discharge end.

[0088] In this specification, if no separate temperature is indicated, the temperature means room temperature.

[0089] In some embodiments, room temperature may mean 20° C. to 25° C.

[0090] In this specification, when no separate physical quantity is indicated, component % and component ratio mean weight % of component and weight ratio of component, respectively.

[0091] As used herein, "puff" refers to the act of inhaling or drawing air through a smoking article to produce and inhale smoke or vapor. "Puff count" may refer to the total number of inhalations or draws made while using the smoking article. Alternatively, or in addition, the puff count may refer to the maximum number of inhalations or draws that the smoking article can provide before being completely consumed or ceases to function.

[0092] In this specification, the HC (Health Canada) conditions may be conditions in which the puff volume per puff is 55 ml, the puff frequency is every 30 seconds, and the puff duration is 2 seconds. In particular, the HC conditions may be conditions in which the perforations of the filter are blocked. The number of puffs measured under the HC conditions may be 9 puffs.

[0093] The content of smoke components including phenol, etc. among the collected smoke components can be measured by using a smoking device (cigarette smoking machine), for example, a linear type cigarette smoking machine from Korber, particularly, for example, LX20, collecting the generated smoke on a Cambridge filter pad (CFP), adding 30 mL of a 1% acetic acid aqueous solution to extract components such as phenol from the collected pad, stirring, filtering with a 0.45 μm PVDF syringe filter, and using an HPLC-FLD analysis device, for example, an Alliance HPLC-FLD analysis device from Water, and a measurement column, Phenomenex LC Column (15 x 4.6 mm Luna 3 μm).

[0094] The contents of general smoke components, including nicotine, water (water, H2O), etc., in the captured smoke can be analyzed through gas chromatography-mass spectrometry (GC / MS). For example, in the case of tar and / or nicotine, the Cambridge filter (Cambridge Filter Pad (CFP)) on which the smoke components are captured can be immersed in isopropyl alcohol (IPA) for a predetermined period of time (e.g., 20 minutes to 16 hours), and the contents of each component can be measured using a gas chromatograph. For example, the contents of components such as nicotine in the captured smoke can be measured through gas chromatography (GC / MS) using a DB-WAX column (30 m Х 0.320 mm, 0.50 μm). The above GC / MS may be, for example, a measuring device from Agilent, for example, GC 8890.

[0095] The above GC / MS may be, for example, a measuring device from Agilent, for example, GC 8890.

[0096] In this specification, the unit "mmWG" means "mmH2O" as a unit of pressure.

[0097] In this specification, the unit "CU" is a CORESTA (Cooperation Center for Scientific Research Relative to Tobacco) unit, which is 1 cm at a pressure difference of 1 kPa. 2 Volumetric flow rate (cm) passing through a sample of substrate 3 / min) means.

[0098] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the attached drawings.

[0099]

[0100] FIG. 1 is a drawing showing a schematic configuration of a smoking article according to one embodiment of the present invention.

[0101] Throughout the specification, “smoking article” may mean an article capable of generating an aerosol, such as a cigarette (cigarette), cigar, etc. The smoking article may include an aerosol generating material and / or an aerosol forming substrate. The smoking article may also include a solid material based on tobacco raw materials, such as tobacco leaf, tobacco ash, or reconstituted tobacco. The smoking material may include a volatile compound.

[0102] Additionally, throughout the specification, “upstream” or “upstream direction” means a direction away from the mouth of a user (consumer) who smokes the smoking article (100), and “downstream” or “downstream direction” means a direction toward the mouth of a user (consumer) who smokes the smoking article (100). For example, in the smoking article (100) illustrated in FIG. 1, the smoking material portion (10) is located upstream or in the upstream direction of the filter portion (20) included in the filter for the smoking article.

[0103] Furthermore, in this specification, the smoking article (100) is described as an example of a combustion-type cigarette, but is not limited thereto, and the smoking article (100) may correspond to a heated cigarette used with an aerosol generating device such as an electronic cigarette device.

[0104] Referring to FIG. 1, a smoking article (100) may include a smoking material portion (10), a filter portion (20), a smoking material portion wrapper (30a), a filter portion wrapper (30b), and a tip paper (40). A filter for a smoking article according to the present invention may include a filter portion (20) and a filter portion wrapper (30b) surrounding the filter portion (20). The smoking material portion wrapper (30a) and / or the filter portion wrapper (30b) may be positioned at the outermost portion of the smoking article (200), and may be a single wrapper, or may be a combination of multiple wrappers. In the smoking article (100), the smoking material portion (10) is positioned upstream compared to the filter portion (20).

[0105] The smoking material portion (10) may be filled with a smoking material such as raw tobacco leaf, sheet tobacco, or a mixture of leaf tobacco and sheet tobacco. The processed smoking material may be filled into the smoking material portion (10) in the form of a sheet or a piece of paper. The smoking material portion (10) may have an elongated rod shape, and its length, circumference, and diameter are not particularly limited, but may be adjusted to a size generally used in the relevant technical field in consideration of the amount of smoking material filled, the preferences of the user (consumer), etc.

[0106] The smoking material portion (10) may include at least one aerosol-generating material selected from the group consisting of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol. The smoking material portion (10) may contain other additives such as flavoring agents, humectants, and / or acetate compounds. The aerosol-generating material and / or additives may be contained in the smoking material.

[0107] The above smoking material portion (10) can be packaged by a smoking material portion wrapper (30a).

[0108]

[0109] The filter for smoking articles may be positioned downstream of the smoking material portion (10). The filter portion (20) of the filter for smoking articles is positioned downstream of the smoking material portion (10) and functions as a filter through which aerosol substances generated from the smoking material portion (10) pass immediately before being inhaled by the user (consumer or smoker). The filter portion (20) may be manufactured from various materials or shapes.

[0110] A filter for a smoking article according to one embodiment of the present invention may include a filter part (20) and a filter part wrapper (30b) surrounding the filter part (20).

[0111] A filter unit (20) according to one embodiment of the present invention may include a regenerated cellulose tow including a plurality of regenerated cellulose fibers and a single-molecule additive dispersed in the regenerated cellulose tow.

[0112] In some embodiments, the regenerated cellulose fibers may comprise at least one of viscose fibers and lyocell fibers, preferably the regenerated cellulose fibers may be lyocell fibers.

[0113] In one embodiment, the regenerated cellulose tow comprising a plurality of regenerated cellulose fibers may be a lyocell tow comprising a plurality of lyocell fibers.

[0114] In some embodiments, the lyocell tow may comprise only a plurality of lyocell fibers as fibers and may not comprise any additional fibers other than the lyocell fibers. That is, the lyocell tow may be composed of a plurality of lyocell fibers. Since the lyocell tow comprises only lyocell fibers as fibers, the biodegradability of a filter for a smoking article comprising a filter portion comprising lyocell tow may be excellent.

[0115] In one embodiment, the filter unit (20) may include a lyocell tow comprising a plurality of lyocell fibers and a single-molecule additive dispersed in the lyocell tow.

[0116] In one embodiment, the filter unit (20) may include a viscose tow comprising a plurality of viscose fibers and a single-molecule additive dispersed in the viscose tow.

[0117] In one embodiment, the filter unit (20) may include a lyocell tow comprising a plurality of lyocell fibers, a viscose tow comprising a plurality of viscose fibers, and a single-molecule additive dispersed in the lyocell tow and the viscose tow.

[0118] The filter for a smoking article comprising the above-described regenerated cellulose tow (preferably lyocell tow and / or viscose tow) can replace all or part of the filter section (20) of an existing smoking article, and when replacing part of it, the filter material previously used can also be used together. Existing filter materials such as a cellulose acetate filter and a hollow tube filter can be used, for example.

[0119] In Fig. 1, the filter unit (20) is illustrated as a mono filter consisting of a single filter, but is not limited thereto. For example, the filter unit (20) may be provided as a dual filter or triple filter having two or more filters to increase filter efficiency.

[0120] In some embodiments, when the filter unit (20) is provided as a dual filter or a triple filter, at least one filter among the plurality of filters may be a filter including regenerated cellulose tow (preferably, lyocell tow and / or viscose tow) containing the lyocell fiber of the present invention and a filter including a single-molecular additive dispersed in the regenerated cellulose tow (preferably, lyocell tow and / or viscose tow) (hereinafter, a regenerated cellulose filter (preferably, lyocell filter and / or viscose filter)), and another filter among the plurality of filters may be a cellulose acetate filter and / or a paper filter. In this case, the length of the regenerated cellulose filter of the present invention may have a length of 25% to 50% of the total length of the filter unit (20). In addition, although not shown, the inside of the filter unit (20) may further include a crushable capsule (not shown) having a structure in which a liquid containing a fragrance is wrapped with a film.

[0121] The filter part wrapper (30b) surrounds the filter part (20) and can package the filter part (20).

[0122] In some embodiments, the filter wrapper (30b) may include a paper towel. The filter wrapper (30b) may include a regular paper towel or a hard paper towel.

[0123] In some embodiments, the filter portion wrapper (30b) may comprise porous plain paper. In some embodiments, the filter portion wrapper (30b) may comprise porous plain paper having a porosity of 20 kCU to 50 kCU, preferably 22 kCU to 46 kCU, more preferably 23 kCU to 25 kCU, or 34 kCU to 36 kCU, or 44 kCU to 46 kCU, or 35 kCU or 45 kCU. In some embodiments, the filter portion wrapper (30b) may comprise porous plain paper having a porosity of 24 kCU. The filter for a smoking article according to some embodiments of the present invention may further improve biodegradability by including a plain paper other than an oil-resistant plain paper or a hard paper as the filter portion wrapper (30b).

[0124] However, the filter unit wrapper (30b) may include hard paper. Hereinafter, in the present specification, hard paper may refer to paper having a basis weight of a predetermined numerical range or more. In particular, hard paper may refer to paper having a basis weight of 40 gsm or more, preferably 50 gsm or more, more preferably 60 gsm or more, even more preferably 70 gsm or more, and even more preferably 75 gsm or more. General paper may refer to paper having a basis weight of less than 40 gsm, preferably 38 gsm or less, and more preferably 36 gsm or less.

[0125] Additionally, without limitation thereto, the filter wrapper (30b) may include general paper or hard paper that has been treated with an oil-resistant coating.

[0126] The smoking material portion (10) wrapped by the smoking material portion wrapper (30a) and the filter portion (20) wrapped by the filter portion wrapper (30b) can be combined and wrapped by the tip paper (40). The tip paper (40) can be wrapped around at least a portion (e.g., a downstream portion) of the smoking material portion wrapper (30a) and the periphery of the filter portion wrapper (30b) as illustrated in FIG. 1. In other words, at least a portion of the smoking material portion (10) and the filter portion (20) can be further wrapped and physically combined by the tip paper (40).

[0127] According to one embodiment of the present invention, the tip paper (40) may be manufactured from non-porous paper that has not been oil-treated, but is not limited thereto. In addition, the tip paper (40) may contain a non-combustible material to prevent the filter unit (20) from igniting, but is not limited thereto.

[0128]

[0129] Hereinafter, the filter part (20) of the filter for a smoking article according to one embodiment of the present invention will be described in detail.

[0130] The present invention relates to a filter for a smoking article included in a smoking article (100), and the filter for a smoking article according to one embodiment of the present invention includes a filter part (20) including regenerated cellulose tow (preferably, lyocell tow and / or viscose tow) including lyocell fibers, and a monomolecular additive including a monomolecular substance dispersed in the regenerated cellulose tow (preferably, lyocell tow and / or viscose tow). The filter for a smoking article further includes a filter part wrapper (30b) surrounding the filter part (20).

[0131] The above lyocell fiber may be an environmentally friendly fiber made from cellulose extracted from wood pulp. The above regenerated cellulose tow (preferably lyocell tow and / or viscose tow) may refer to a bundle formed by cross-linking adjacent regenerated cellulose fibers (preferably lyocell fibers and / or viscose fibers).

[0132] In some embodiments, the regenerated cellulose fibers (preferably lyocell fibers and / or viscose fibers) may have a non-circular cross-section. A non-circular cross-section is defined as a cross-section whose shape is not circular but includes multiple protrusions. For example, a cross-section having a shape in which multiple protrusions extend from the center may be considered a non-circular cross-section.

[0133] In some embodiments, the regenerated cellulose fibers (preferably lyocell fibers and / or viscose fibers) may have a Y-shaped cross-section with three protrusions branching from the center, a cross-shaped cross-section with four protrusions, a star-shaped cross-section with five or more protrusions, or an O-shaped cross-section, but are not limited thereto. The terms used herein have the same meanings as described above.

[0134] In one embodiment, the single molecule additive is composed of a single molecule material and can be dispersed in the regenerated cellulose tow (preferably, lyocell tow and / or viscose tow). In some embodiments, the single molecule additive can be distributed throughout the entire area of ​​the regenerated cellulose tow (preferably, lyocell tow and / or viscose tow). In some embodiments, the single molecule additive can be dispersed on the surface of the regenerated cellulose-based fibers (preferably, lyocell fibers and / or viscose fibers) that constitute the regenerated cellulose tow (preferably, lyocell tow and / or viscose tow).

[0135] Specifically, the single-molecule additive may be an oligomer, a short-chain compound formed by combining a few or a small number of polyhydric alcohols, which are monomer units having the same structure, or an ether derivative of the oligomer. In other words, the single-molecule additive may be a low-molecular-weight polymer formed by repeating two or more polyhydric alcohols having the same structure, and / or a polymer in which at least one hydroxyl group (-OH, or hydroxyl group) of the polymer is substituted with an ether form. Meanwhile, an oligomer may be distinguished from a polymer in that it is composed of individual molecules having a specific number of monomers, unlike a polymer.

[0136] Although not limited thereto, the monomolecular additive may have a repeating unit number of polyhydric alcohols of 2 to 10, preferably 2 to 9, more preferably 2 to 8, even more preferably 2 to 7, even more preferably 2 to 6, even more preferably 2 to 5, and even more preferably 2 to 4. As the monomolecular additive is selected to have a repeating unit number within the above range, the possibility that a filter for a smoking article comprising regenerated cellulose tow (preferably lyocell tow and / or viscose tow) in which the monomolecular additive is dispersed will be classified as a disposable plastic product under regulations and standards due to the inclusion of synthetic molecules can be minimized.

[0137] In some embodiments, the single molecule additive may be a phenol reducing material dispersed in the regenerated cellulose tow (preferably lyocell tow and / or viscose tow) that functions to specifically reduce phenolic substances in mainstream smoke produced during smoking.

[0138] According to one embodiment of the present invention, a filter for a smoking article comprising regenerated cellulose tow (preferably lyocell tow and / or viscose tow) and a monomolecular additive including a monomolecular phenol-reducing substance, since the phenol-reducing substance that reduces phenol-reducing substances is a monomolecular substance, even if the substance (i.e., the monomolecular additive that performs the phenol-reducing function) is dispersed in the regenerated cellulose tow (preferably lyocell tow and / or viscose tow), a monomolecular phenol-reducing substance rather than a high molecular phenol-reducing substance is added, thereby maintaining the phenol-reducing performance while preventing the concern of being classified as a non-biodegradable plastic. Accordingly, a more stable biodegradable filter for a smoking article can be provided in compliance with the non-biodegradable plastic classification standards.

[0139] The filter for a smoking article to which regenerated cellulose tow (preferably, lyocell tow and / or viscose tow) according to the present invention is applied includes a monomolecular additive including at least one substance selected from the group consisting of oligomers in which polyhydric alcohols are bonded by a small number of units (e.g., 2 or more and 10 or less) as a phenol-reducing substance dispersed on the surface of regenerated cellulose fibers (preferably, lyocell fibers and / or viscose fibers) and / or the group consisting of ether derivatives thereof, thereby having an excellent effect in reducing phenols generated during smoking compared to a filter for a smoking article that does not include a phenol-reducing substance, and since no polymer material is applied, it may not be classified as a disposable plastic product. In addition, as described below, the single molecule additive can be stably present in the regenerated cellulose fibers (preferably lyocell fibers and / or viscose fibers) constituting the regenerated cellulose tow (preferably lyocell tow and / or viscose tow), thereby minimizing ink spreading on the tip paper.

[0140] In some embodiments, the monomolecular additive may be a polyhydric alcohol.

[0141] In some embodiments, the polyhydric alcohol, which is a unit substance of the oligomer or polymer thereof included in the single molecule additive, may include one of ethylene glycol (EG) and propylene glycol (PG).

[0142] Specifically, the single-molecule additive may include at least one selected from the group consisting of ethylene glycol oligomers in which ethylene glycol (EG) is bound in a small number of units (e.g., 2 or more and less than 10 units), or at least one selected from the group consisting of ethylene glycol oligomer ether derivatives which are ether derivatives thereof, or at least one selected from the group consisting of propylene glycol oligomers in which propylene glycol (PG) is bound in a small number of units (e.g., 2 or more and less than 10 units), or at least one selected from the group consisting of propylene glycol oligomer ether derivatives which are ether derivatives thereof.

[0143] Specifically, the single-molecule additive may include at least one selected from the group consisting of ethylene glycol oligomers in which ethylene glycol (EG) is bound by a small number of units (e.g., 2 or more and 10 or less), at least one selected from the group consisting of ethylene glycol oligomer ether derivatives which are ether derivatives thereof, at least one selected from the group consisting of propylene glycol oligomers in which propylene glycol (PG) is bound by a small number of units (e.g., 2 or more and less than 10), and at least one selected from the group consisting of propylene glycol oligomer ether derivatives which are ether derivatives thereof.

[0144] In some embodiments, the ethylene glycol oligomers may include diethylene glycol (DEG), triethylene glycol (TEG), tetraethylene glycol (TetraEG), and pentaethylene glycol (PentaEG).

[0145] The ethylene glycol oligomer may include one or more of diethylene glycol (DEG), triethylene glycol (TEG), tetraethylene glycol (TetraEG), and pentaethylene glycol (PentaEG).

[0146] When the single-molecule additive comprises an ethylene glycol oligomer, the single-molecule additive may comprise at least one selected from the group consisting of diethylene glycol (DEG), triethylene glycol (TEG), tetraethylene glycol (TetraEG), and pentaethylene glycol (PentaEG). However, without limitation thereto, the ethylene glycol oligomer may also comprise an oligomer in which six or more ethylene glycols (EG) are combined.

[0147] In some embodiments, the ethylene glycol oligomer ether derivative may comprise a material selected from the group of ethylene glycol oligomers in which at least one hydroxyl group (or hydroxyl group) of the material is substituted with an ether form. In some embodiments, the ethylene glycol oligomer ether derivatives include diethylene glycol monomethyl ether (DEGME), diethylene glycol monoethyl ether (DEGEE), diethylene glycol monobutyl ether (DEGBE), diethylene glycol dimethyl ether (DEGDME), diethylene glycol diethyl ether (DEGDEE), triethylene glycol monomethyl ether (TEGME), triethylene glycol monoethyl ether (TEGEE), triethylene glycol dimethyl ether (TEGDME), triethylene glycol diethyl ether (TEGDEE), It may include tetraethylene glycol monomethyl ether (TetraEGME), tetraethylene glycol monoethyl ether (TetraEGEE), etc. When the single molecule additive includes an ethylene glycol oligomer ether derivative, the single molecule additive may include at least one of the materials listed above.

[0148] In some embodiments, the propylene glycol oligomer may include dipropylene glycol (DPG), tripropylene glycol (TPG), tetrapropylene glycol (TetraEG), and pentapropylene glycol (PentaEG). When the single-molecule additive includes a propylene glycol oligomer, the single-molecule additive may include at least one selected from the group consisting of dipropylene glycol (DPG), tripropylene glycol (TPG), tetrapropylene glycol (TetraEG), and pentapropylene glycol (PentaEG). However, without limitation thereto, the propylene glycol oligomer may include an oligomer in which six or more propylene glycols (PG) are bonded.

[0149] In some embodiments, the propylene glycol oligomer ether derivative may comprise a material selected from the group of propylene glycol oligomers in which at least one hydroxyl group (or hydroxyl group) is substituted in an ether form. In some embodiments, the ethylene glycol oligomer ether derivatives include dipropylene glycol monomethyl ether (DPGME), dipropylene glycol monoethyl ether (DPGEE), dipropylene glycol monopropyl ether (DPGPE), dipropylene glycol monobutyl ether (DPGBE), dipropylene glycol dimethyl ether (DPGDME), tripropylene glycol monomethyl ether (TPGME), tripropylene glycol monoethyl ether (TPGEE), tripropylene glycol monobutyl ether (TPGBE), and propylene glycol monomethyl ether. It may include propylene glycol monomethyl ether acetate (PGMEA), dipropylene glycol monomethyl ether acetate (DPGMEA), etc. When the single molecule additive includes a propylene glycol oligomer ether derivative, the single molecule additive may include at least one of the materials listed above.

[0150] In some embodiments, the mono denier of the regenerated cellulose tow (preferably lyocell tow and / or viscose tow) can be, but is not limited to, in the range of 0.3333 to 1.556 tex (3.0 to 14.0 Denier), preferably 0.3389 to 1.5 tex (3.05 to 13.5 Denier), more preferably 0.3444 to 1.444 tex (3.10 to 13 Denier), even more preferably 0.35 to 1.389 tex (3.15 to 12.5 Denier), and even more preferably 0.3556 to 1.333 tex (3.2 to 12 Denier).

[0151] In some embodiments, the total denier of the regenerated cellulose tow (preferably lyocell tow and / or viscose tow) can be, but is not limited to, in the range of 0.3333 to 1.556 tex (3.0 to 14.0 Denier), preferably 0.3389 to 1.5 tex (3.05 to 13.5 Denier), more preferably 0.3444 to 1.444 tex (3.10 to 13 Denier), even more preferably 0.35 to 1.389 tex (3.15 to 12.5 Denier), and even more preferably 0.3556 to 1.333 tex (3.2 to 12 Denier).

[0152] In this specification, single fineness may refer to the fineness of a fiber expressed by the weight (g) of one fiber strand per unit length of 9000 m, and total fineness may refer to the fineness of a fiber expressed by the weight (g) of a tow per unit length of 9000 m.

[0153] In some embodiments, the single molecule additive may be added in an amount of 30 mg / rod to 300 mg / rod, preferably 40 mg / rod to 280 mg / rod, and more preferably 50 mg / rod to 260 mg / rod, based on a regenerated cellulose filter (preferably a lyocell filter and / or a viscose filter) having a length of 108 mm and a circumference of 24.2 mm. In other words, the single molecule additive may be added in an amount of 7.5 mg / rod to 75 mg / rod, preferably 10 mg / rod to 70 mg / rod, and more preferably 12.5 mg / rod to 65 mg / rod, based on a regenerated cellulose filter (preferably a lyocell filter and / or a viscose filter) having a length of 27 mm and a circumference of 24.2 mm.

[0154] In some embodiments, the single molecule additive may comprise at least one selected from the group consisting of ethylene glycol oligomers, ethylene glycol oligomer ether derivatives, propylene glycol oligomers, or propylene glycol oligomer ether derivatives having a molecular weight of less than 1000, preferably less than 800, more preferably less than 700, even more preferably less than 600, and even more preferably less than 500. The molecular weight may be a number average molecular weight.

[0155]

[0156] Hereinafter, the composition and resulting effects of the present invention will be described in more detail through examples and comparative examples. However, these examples are intended to more specifically illustrate the present invention, and the scope of the present invention is not limited to these examples.

[0157]

[0158] Example 1

[0159] Based on a lyocell filter having a length of 108 mm and a circumference of 24.2 mm, a lyocell tow having a mono denier of 0.3778 tex (3.4 Denier) and a total denier of 433.3 tex (3,900 Denier) was wrapped with porous general paper having a width of 26.5 mm, a porosity of 24 kCU, and a basis weight of 21 gsm, after adding 60 mg / rod of triethylene glycol (TEG), which is a single molecule additive, as a phenol-reducing material, to the filter, and then the filter was wrapped with porous general paper having a width of 26.5 mm, a porosity of 24 kCU, and a basis weight of 21 gsm, to manufacture a lyocell filter (filter for smoking articles) having a length of 108 mm, a circumference of 24.2 mm, and a suction resistance of 405 mmWG.

[0160]

[0161] Example 2

[0162] A lyocell filter (filter for smoking articles) was manufactured in the same manner as in Example 1, except that the single molecule additive used as a phenol-reducing substance added to lyocell tow was tetraethylene glycol (TetraEG) instead of triethylene glycol (TEG).

[0163]

[0164] Example 3

[0165] A lyocell filter (filter for smoking articles) was manufactured in the same manner as in Example 1, except that the single molecule additive used as a phenol-reducing substance added to the lyocell tow was dipropylene glycol (DPG) instead of triethylene glycol (TEG).

[0166]

[0167] Example 4

[0168] A lyocell filter (filter for smoking articles) was manufactured in the same manner as in Example 1, except that the single molecule additive used as a phenol-reducing substance added to lyocell tow was tripropylene glycol (TPG) instead of triethylene glycol (TEG).

[0169]

[0170] Example 5

[0171] A lyocell filter (filter for smoking articles) was manufactured in the same manner as in Example 1, except that the single molecule additive used as a phenol-reducing substance added to the lyocell tow was dipropylene glycol monomethyl ether (DPGME) instead of triethylene glycol (TEG).

[0172]

[0173] Example 6

[0174] A lyocell filter (filter for smoking articles) was manufactured in the same manner as in Example 1, except that the single molecule additive used as a phenol-reducing substance added to the lyocell tow was tripropylene glycol butyl ether (TPGBE) instead of triethylene glycol (TEG).

[0175]

[0176] Comparative Example 1

[0177] A lyocell filter (filter for smoking articles) was manufactured in the same manner as in Example 1, except that no additive, a phenol-reducing substance, was added to the lyocell tow.

[0178]

[0179] Comparative Example 2

[0180] A lyocell filter (filter for smoking articles) was manufactured in the same manner as in Example 1, except that polyethylene glycol 600 (PEG 600), a high molecular weight substance rather than a single molecular substance among ethylene glycol derivatives, was added as a phenol-reducing substance to lyocell tow.

[0181]

[0182] Comparative Example 3

[0183] A lyocell filter (filter for smoking articles) was manufactured in the same manner as in Example 1, except that diglycerol (DGL) was added as a phenol-reducing agent to the lyocell tow.

[0184]

[0185] Comparative Example 4

[0186] A lyocell filter (filter for smoking articles) was manufactured in the same manner as in Example 1, except that triglycerol (TGL) was added as a phenol-reducing substance to the lyocell tow.

[0187]

[0188] Experimental Example 1: Analysis of smoke phenol reduction performance according to additives containing phenol-reducing substances - harsh conditions

[0189] The smoking article filters of Examples 1 to 6 and Comparative Examples 1 to 4, each having a length of 108 mm, were divided into four parts, and a smoking article filter having a length of 27 mm and a smoking material portion having a length of 57 mm and to which 3 mg of tar was applied were combined with tip paper to manufacture a smoking article, and the smoking article including the manufactured smoking article filters of each Example and Comparative Example was smoked under HC conditions (Puff volume: 55 ml / Puff frequency: 30 s / Puff duration: 2 s / Number of puffs: 9 puffs) using a linear smoking device (Linear type cigarette smoking machine) LX20 from Korber, and the generated smoke was captured using a Cambridge filter pad (CFP) and analyzed. Specifically, to extract the substance from the captured pad, 30 mL of 1% acetic acid aqueous solution was added, stirred, and filtered with a 0.45 μm PVDF syringe filter. The amount of phenol component was measured using a measurement column Phenomenex LC Column (15 x 4.6 mm Luna 3 μm) using an Alliance HPLC-FLD analysis device from Water, and the measurement results of the phenol component were substituted into the following mathematical expression 1 to calculate the phenol removal capacity of the filter, and the results are shown in Table 1 below.

[0190]

[0191] [Mathematical Formula 1]

[0192]

[0193]

[0194] ClassificationPhenol (㎍)Removal ability (%)Comparative Example 1 (BLANK) 45.5-Comparative Example 2 (PEG 600) 16.86 3.1Comparative Example 3 (DGL) 42.6 6.3Comparative Example 4 (TGL) 38.8 14.7Example 1 (TEG) 25.9 4 3.1Example 2 (TetraEG) 22.3 5 1.0Example 3 (DPG) 35.3 2 2.4Example 4 (TPG) 26.6 4 1.5Example 5 (DPGME) 40.3 1 1.4Example 6 (TPGBE) 27.5 3 9.5

[0195] Referring to Table 1 above, it can be confirmed that the phenol removal ability of Examples 1 to 6 is superior to the phenol removal ability of Comparative Examples 3 and 4, in which DGL and TGL, selected from the group of glycerol-based oligomers, were added as single-molecule additives, which are polyhydric alcohol substances, respectively. That is, it can be confirmed that the phenol removal ability of ethylene glycol-based oligomers (e.g., TEG, TetraEG) or their ether derivatives, propylene glycol-based oligomers (e.g., DPG, TPG) or their ether derivatives (e.g., DPGME, TPGBE) is superior to that of glycerol-based oligomer substances (DGL, TGL).

[0196] In addition, the phenol component removal ability of Comparative Example 2, in which PEG 600, a polymer material, was added as a phenol reduction material, was 63.1%, and Example 1, in which TEG, a single-molecular material, was added, Example 2, in which TetraEG, a single-molecular material, was added, Example 4, in which TPG, a single-molecular material, was added, and Example 6, in which TPGBE, a single-molecular material, had phenol component removal abilities of 43.1%, 51.0%, 41.5%, and 39.5%, respectively, which was slightly decreased compared to the polymer material PEG 600, but it was confirmed that excellent phenol component removal ability was maintained. Accordingly, it was confirmed that phenol reduction performance can be maintained even with a single-molecular material rather than a polymer material.

[0197] In particular, it can be confirmed that the phenol component removal ability of Example 2, which has a higher molecular weight than Example 1, is superior in the ethylene glycol oligomer, and the phenol component removal ability of Example 4, which has a higher molecular weight than Example 3, is superior in the propylene glycol oligomer.

[0198]

[0199] Experimental Example 2: Analysis of smoke components according to additives containing phenol-reducing substances - harsh conditions

[0200] In order to measure the phenol component in the smoke, the smoking article filters of Examples 1 and 4 and Comparative Examples 1 and 2 were divided into four parts substantially the same as Experimental Example 1, and a smoking article filter having a length of 27 mm and a smoking material part having a length of 57 mm to which 3 mg of tar was applied were combined with a tip paper to manufacture a smoking article, and the smoking article including the smoking article filters of each of the manufactured Examples and Comparative Examples was smoked under HC conditions (Puff volume: 55 ml / Puff frequency: 30 s / Puff duration: 2 s / Number of puffs: 9 puffs) using a linear smoking device (Linear type cigarette smoking machine) LX20 of Korber Co., Ltd., and the generated smoke was collected using a Cambridge filter pad (CFP), and 30 mL of a 1% acetic acid aqueous solution was added to the collected pad to extract the phenol component, stirred, and filtered using a 0.45 μm PVDF syringe filter, and then the smoke was analyzed using an Alliance HPLC-FLD analysis instrument and a measurement column of Water Co., Ltd. The amount of phenol component in the captured pad was measured using Phenomenex LC Column (15 x 4.6 mm Luna 3 μm), and the measurement results of the phenol component are shown in Table 2.

[0201] In addition, in order to measure the nicotine component in smoke, the smoking article filters of Examples 1 and 4 and Comparative Examples 1 and 2 were divided into four parts substantially the same as Experimental Example 1, and a smoking article filter having a length of 27 mm and a smoking material portion having a length of 57 mm and 3 mg tar applied thereto were combined with a tip paper to manufacture a smoking article, and the smoking article including the smoking article filters of each of the manufactured Examples and Comparative Examples was subjected to smoking under HC conditions (Puff volume: 55 ml / Puff frequency: 30 s / Puff duration: 2 s / Number of puffs: 9 puffs) using a rotary smoking device RM20H from Borgwladt to capture tobacco smoke, and then analyzed using a gas chromatograph (GC 8890, Agilent). At this time, a DB-WAX column (30 m Х 0.320 mm, 0.50 μm) was used to separate the nicotine component, and the content of the nicotine component was quantified according to the ISO 22253 standard, and the measurement results of the nicotine component are shown in Table 2.

[0202]

[0203] ClassificationPhenol (㎍)Nicotine (mg)Comparative Example 1 (BLANK) 39.9 1.30Comparative Example 2 (PEG 600) 21.6 1.26Example 1 (TEG) 29.3 1.18Example 4 (TPG) 25.9 1.24

[0204] Referring to Table 2 above, the amount of phenol component in the smoke of Comparative Example 2, in which PEG 600, a high molecular weight material, was added as a phenol-reducing material, was 21.6 ㎍, and the amounts of phenol component in the smoke of Examples 1 and 4 were 29.3 ㎍ and 25.9 ㎍, respectively. It can be confirmed that the amount of phenol component in the smoke increased compared to Comparative Example 2, but they had similar phenol removal capabilities.

[0205] In addition, it can be confirmed that the nicotine transfer amount of Comparative Example 2 is 1.26 mg, and the nicotine transfer amounts of Examples 1 and 4 are 1.18 mg and 1.24 mg, respectively, and have nicotine transfer performance similar to that of Comparative Example 2.

[0206] In conclusion, it can be confirmed that even though a single molecule additive is applied to lyocell tow, it can provide similar phenol reduction performance and nicotine transfer performance to the high molecular weight additive PEG 600.

[0207]

[0208] Example 7

[0209] A lyocell filter (filter for smoking articles) was manufactured in the same manner as in Example 4, except that the amount of tripropylene glycol (TPG) added to the lyocell tow was 120 mg / rod (based on a length of 108 mm and a circumference of 24.2 mm). (This is 30 mg / rod based on a length of 27 mm and a circumference of 24.2 mm.)

[0210]

[0211] Example 8

[0212] A lyocell filter (filter for smoking articles) was manufactured in the same manner as in Example 4, except that the amount of tripropylene glycol (TPG) added to the lyocell tow was 180 mg / rod (based on a length of 108 mm and a circumference of 24.2 mm). (This is 45 mg / rod based on a length of 27 mm and a circumference of 24.2 mm.)

[0213]

[0214] Example 9

[0215] A lyocell filter (filter for smoking articles) was manufactured in the same manner as in Example 4, except that the amount of tripropylene glycol (TPG) added to the lyocell tow was 240 mg / rod (based on a length of 108 mm and a circumference of 24.2 mm). (60 mg / rod based on a length of 27 mm and a circumference of 24.2 mm)

[0216]

[0217] Example 10

[0218] A lyocell filter (filter for smoking articles) was manufactured in the same manner as in Example 6, except that the amount of tripropylene glycol butyl ether (TPGBE) added to the lyocell tow was 120 mg / rod (based on a length of 108 mm and a circumference of 24.2 mm). (This is 30 mg / rod based on a length of 27 mm and a circumference of 24.2 mm.)

[0219]

[0220] Example 11

[0221] A lyocell filter (filter for smoking articles) was manufactured in the same manner as in Example 6, except that the amount of tripropylene glycol butyl ether (TPGBE) added to the lyocell tow was 180 mg / rod (based on a length of 108 mm and a circumference of 24.2 mm). (This is 45 mg / rod based on a length of 27 mm and a circumference of 24.2 mm.)

[0222]

[0223] Example 12

[0224] A lyocell filter (filter for smoking articles) was manufactured in the same manner as in Example 6, except that the amount of tripropylene glycol butyl ether (TPGBE) added to the lyocell tow was 240 mg / rod (based on a length of 108 mm and a circumference of 24.2 mm). (60 mg / rod based on a length of 27 mm and a circumference of 24.2 mm)

[0225]

[0226] Experimental Example 3: Analysis of smoke phenol reduction performance according to the amount of additive containing phenol-reducing substance added - harsh conditions

[0227] The smoking article filters of Examples 7 to 12, Comparative Example 1, and Comparative Example 2 were divided into four parts, and a smoking article filter having a length of 27 mm and a smoking material portion having a length of 57 mm and to which 3 mg of tar was applied were combined with tip paper to manufacture a smoking article. The smoking article including the smoking article filters of each of the manufactured Examples and Comparative Examples was subjected to the same smoking conditions and analysis method as Experimental Example 1 to calculate the amount of phenol component and the phenol removal capacity of the filter, and the results are shown in Table 3 below.

[0228] ClassificationTar(㎍)Removal ability(%)Comparative Example 1 (BLANK) 47.7-Comparative Example 2 (PEG 600) 26.644.2Example 4 (TPG) - 1526.644.2Example 7 (TPG) - 3022.353.2Example 8 (TPG) - 4520.058.1Example 9 (TPG) - 6016.964.6Example 6 (TPGBE) - 1529.338.6Example 10 (TPGBE) - 3021.554.9Example 11 (TPGBE) - 4521.954.1Example 12 (TPGBE) - 6019.658.9

[0229] Referring to Table 3 above, it can be confirmed that in Examples 4 and 7 to 9, in which TPG, which is one of the propylene glycol oligomers, was added as a single-molecule additive, and in Example 6 and Examples 10 to 12, in which TPGBE, which is one of the ether derivatives of propylene glycol oligomers, was added as a single-molecule additive, the removal performance was superior to or similar to that of PEG 600, which was a high-molecular additive. In particular, it can be confirmed that the phenol reduction performance was superior as the amount of the single-molecule additive added to the filter increased. In addition, it can be confirmed that the phenol reduction performance of Examples 4 and 7 to 9, in which TPG was added, was superior to that of TPGBE when a similar addition amount was applied.

[0230]

[0231] FIG. 2 is an image taken at each period to show whether ink spreads in a filter for a smoking article of Example 1 of the present invention, FIG. 3 is an image taken at each period to show whether ink spreads in a filter for a smoking article of Example 4 of the present invention, FIG. 4 is an image taken at each period to show whether ink spreads in a filter for a smoking article of Example 6 of the present invention, FIG. 5 is an image taken at each period to show whether ink spreads in a filter for a smoking article of Comparative Example 5 of the present invention, and FIG. 6 is an image taken at each period to show whether ink spreads in a filter for a smoking article of Comparative Example 6 of the present invention.

[0232]

[0233] Comparative Example 5

[0234] A lyocell filter (filter for smoking articles) was manufactured in the same manner as in Example 1, except that an additive consisting of PEG 600 and TEC (triethyl citrate) in a weight ratio of 7:3 was added as a phenol-reducing substance to lyocell tow.

[0235]

[0236] Comparative Example 6

[0237] A lyocell filter (filter for smoking articles) was manufactured in the same manner as in Example 1, except that polypropylene glycol 1000 (PPG 1000) was added as a phenol-reducing agent to lyocell tow.

[0238]

[0239] Experimental Example 4: Evaluation of ink smudging on tip paper according to additives containing phenol-reducing substances.

[0240] The smoking article filters of Examples 1, 4, 6, Comparative Examples 5, and 6, each having a length of 108 mm, were cut in half, and the smoking article filter, each having a length of 54 mm, was completely wrapped with tip paper (uncoated) made of paper with a cork shape printed on the front, and adhered to produce a filter wrapped with a tip paper with a cork shape printed on it. Then, the manufactured tip paper-wrapped filter was stored in a harsh condition chamber with a temperature of 45±5℃ and a relative humidity of 75±5% for a period of time (for 2 weeks, 4 weeks, and 8 weeks) to check for ink spreading of the tip paper. To check for ink spreading of the tip paper, the filter wrapped with the tip paper was placed on an A4 paper, and the filter was rubbed while rotating it left and right in the length direction 10 times to check for ink spreading, and the results are shown in FIGS. 2 to 6.

[0241] Specifically, FIG. 2 shows the ink spreading results of the filter to which Example 1 was applied, in which (a) is an image of the ink spreading results of the tip paper after 2 weeks, (b) is an image of the ink spreading results of the tip paper after 4 weeks of storage, and (c) is an image of the ink spreading results of the filter to which Example 4 was applied, in which (a) is an image of the ink spreading results of the tip paper after 2 weeks of storage, (b) is an image of the ink spreading results of the tip paper after 4 weeks of storage, and (c) is an image of the ink spreading results of the filter to which Example 6 was applied, in which (a) is an image of the ink spreading results of the tip paper after 2 weeks of storage, and FIG. 5 shows the ink spreading results of the filter to which Comparative Example 5 was applied, in which (a) is an image of the ink spreading results of the tip paper after 2 weeks of storage, (b) is an image of the ink spreading results of the tip paper after 4 weeks of storage, and (c) is an image of the ink spreading results of the filter to which Comparative Example 6 was applied, in which (a) is an image of the ink spreading results of the tip paper after 8 weeks of storage. (b) is an image showing the ink spreading on the tip paper after 4 weeks of storage.

[0242]

[0243] In Figs. 2, 3, and 5, (a) and (b) almost no ink bleeding occurred, and in Figs. 2, 3, and 5, (c) it can be seen that a small amount of ink is faintly bleeding. Accordingly, when a single-molecule additive such as TEG or TPG is applied as a phenol-reducing material (Example 1, Example 4), the degree of ink bleeding is similar to when PEG 600, an amphoteric additive, is included to minimize ink bleeding (Comparative Example 5), and it can be confirmed that it exists stably within the lyocell fibers constituting the lyocell tow and does not leak toward the tip paper.

[0244] In Fig. 4 (a), it can be confirmed that ink smearing occurs very frequently. Accordingly, it can be confirmed that although TPGBE has excellent phenol reduction performance, it does not exist stably within the lyocell fibers that make up the lyocell tow, but rather leaks to the outside, causing a deterioration in the appearance quality.

[0245] In Fig. 6, it can be confirmed that ink smearing occurs in (a) and (b). Accordingly, it can be confirmed that TPG or TEG, which are single-molecule materials of the present invention, can provide superior quality in terms of ink smearing compared to PPG 1000.

[0246]

[0247] Although the embodiments of the present disclosure have been described with reference to the attached drawings, those skilled in the art will appreciate that the present disclosure can be implemented in other specific forms without changing the technical concepts or essential features thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of protection of the present disclosure should be interpreted by the claims below, and all technical ideas within a scope equivalent thereto should be interpreted as being included within the scope of the technical ideas defined by the present disclosure.

Claims

1. A filter unit comprising: a regenerated cellulose tow comprising regenerated cellulose fibers; and a single-molecule additive dispersed in the regenerated cellulose tow; Filters for smoking items.

2. In paragraph 1, The above regenerated cellulose fiber comprises at least one of viscose fiber and lyocell fiber. Filters for smoking items.

3. In paragraph 1, The above regenerated cellulose fibers include lyocell fibers, The above regenerated cellulose tow is lyocell tow, Filters for smoking items.

4. In paragraph 3, The above lyocell tow is characterized in that it is made only of the above lyocell fibers as a fiber. Filters for smoking items.

5. In paragraph 1, The above single molecule additive is characterized in that it is a phenol-reducing substance. Filters for smoking items.

6. In paragraph 1, The above single molecule additive is characterized by being a polyhydric alcohol. Filters for smoking items.

7. In paragraph 1, The above single molecule additive comprises at least one selected from the group consisting of ethylene glycol oligomers, ethylene glycol oligomer ether derivatives which are ether derivatives of the ethylene glycol oligomers, propylene glycol oligomers, and propylene glycol oligomer ether derivatives which are ether derivatives of the propylene glycol oligomers. Filters for smoking items.

8. In paragraph 7, The above ethylene glycol oligomer comprises at least one of diethylene glycol (DEG), triethylene glycol (TEG), tetraethylene glycol (TetraEG), and pentaethylene glycol (PentaEG). The above propylene glycol oligomer comprises at least one of dipropylene glycol (DPG), tripropylene glycol (TPG), tetrapropylene glycol (TetraEG), and pentapropylene glycol (PentaEG). Filters for smoking items.

9. In paragraph 8, The above single molecule additive comprises at least one of triethylene glycol (TEG), tetraethylene glycol (TetraEG) and tripropylene glycol (TPG). Filters for smoking items.

10. In paragraph 1, The above single molecule additive is characterized by being an oligomer in which two or more polyhydric alcohols of the same structure are repeated, or an ether derivative of the oligomer. Filters for smoking items.

11. In paragraph 10, The above polyhydric alcohol is characterized in that it is one of ethylene glycol (EG) and propylene glycol (PG). Filters for smoking items.

12. In paragraph 1, Further comprising a filter part wrapper surrounding the above filter part, The above filter part wrapper comprises a porous general paper, Filters for smoking items.

13. Smoking substances section; and A filter for smoking articles arranged downstream of the smoking material section; and Including a tip paper covering at least a portion of the smoking material portion and the filter for the smoking article, The above filter for smoking articles is, A filter unit comprising regenerated cellulose tow comprising regenerated cellulose fibers, and a single-molecule additive dispersed in the regenerated cellulose tow; and A filter part wrapper that surrounds the filter part; Smoking items.

14. In paragraph 13, The above regenerated cellulose tow is a lyocell tow comprising a plurality of lyocell fibers, The above single molecule additive is characterized in that it is a phenol-reducing substance. Smoking items.

15. In paragraph 13, The above single molecule additive is, Comprising at least one selected from the group consisting of ethylene glycol oligomers, ethylene glycol oligomer ether derivatives which are ether derivatives of the ethylene glycol oligomers, propylene glycol oligomers, and propylene glycol oligomer ether derivatives which are ether derivatives of the propylene glycol oligomers. Smoking items.

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