Lyocell material, smoking article filter, smoking article, and methods for manufacturing same

Abstract

The present application relates to a lyocell material, a smoking article filter comprising the lyocell material, and a smoking article. The lyocell material and the smoking article filter according to the present application can replace conventional cellulose acetate materials and filters.

Description

Lyocell material, filters for smoking articles, smoking articles and methods for manufacturing them

[0001] The present application relates to lyocell material, filters containing the same, smoking articles, and methods for manufacturing the same.

[0002] Until now, cellulose acetate fibers have been primarily used as cigarette filter materials. While cellulose acetate is known to be biodegradable, cellulose acetate-based smoking device filters retain their original form for one to two years after being buried in the soil, and complete biodegradation takes considerable time. Considering the amount of tobacco products collected and landfilled as waste after smoking, as well as the amount and toxicity of tobacco products discarded in the environment, there is a need to further improve the biodegradability of smoking device filters. Accordingly, lyocell, a more environmentally friendly material, has recently been chosen as a replacement for cellulose acetate.

[0003] One purpose of the present application is to provide a lyocell material that can replace commercially available cellulose acetate for use as a filter for smoking articles.

[0004] Another object of the present application is to provide a lyocell material for a smoking article filter, which is environmentally friendly in its manufacturing process and has excellent biodegradability when disposed of.

[0005] Another object of the present application is to provide a lyocell filter for smoking articles.

[0006] Another object of the present application is to provide a smoking article (e.g., a cigarette) comprising a lyocell filter.

[0007] According to an example of the present application, a lyocell material, a filter including the same, and a smoking article may be provided.

[0008] Specifically, a first lyocell multifilament; and a second lyocell multifilament, wherein the first lyocell multifilament comprises a first monofilament having a first single fineness, and the second lyocell multifilament comprises a second monofilament having a second single fineness, wherein the first single fineness and the second single fineness may be provided from different lyocell materials, and / or the first single fineness and the second single fineness may be different.

[0009] Also provided is a filter for a smoking article comprising a first lyocell multifilament; and a second lyocell multifilament, wherein the first lyocell multifilament comprises a first monofilament having a first single fineness, and the second lyocell multifilament comprises a second monofilament having a second single fineness, wherein the first single fineness and the second single fineness are different lyocell materials, and / or the first single fineness and the second single fineness may be different.

[0010] According to another specific example of the present application, a smoking article comprising the lyocell material or filter may be provided.

[0011] According to another specific example of the present application, a method for producing the above lyocell material can be provided.

[0012]

[0013] In this specification, "smoking article" may refer to an article capable of generating an aerosol, such as a cigarette or cigar. In this regard, the smoking article may include an aerosol-generating material or an aerosol-forming substrate. Furthermore, the smoking article may include a solid material based on tobacco raw materials, such as tobacco leaf, tobacco ash, or reconstituted tobacco. Additionally, the smoking material may include volatile compounds.

[0014] Unless otherwise specifically defined herein, if the characteristics of lyocell materials, filters for smoking articles, and related components or compositions thereof are affected by temperature, the temperature at which the characteristics are confirmed or measured may be room temperature. In this case, room temperature refers to a temperature in a non-thermally or non-heated state, and may be, for example, a temperature of 10 to 35°C, specifically 15 to 35°C, 20 to 30°C, or about 25°C.

[0015] In this specification, the term "different" may mean qualitatively different from each other. For example, "A and B are different" may mean that the amount of A and the amount of B are the same, but A and B are qualitatively distinct, or that A and B are quantitatively different and also qualitatively distinct. The term "qualitative" may mean non-quantitative characteristics. For example, differences in color, shape, texture, structure, and composition may fall under "qualitative" differences.

[0016] As used herein, the term “crimp” may refer to a wave-like, curled or undulated configuration imparted to a material, such as a fiber, (mono)filament, multifilament and / or yarn, either inherently or through mechanical, thermal and / or chemical processes. Crimp may be characterized by a periodic deviation from a straight axis along the length of the material, fiber, filament, multifilament and / or yarn. One crimp in a material, fiber, filament, multifilament and / or yarn may be defined as one repeating unit of said periodic deviation. The presence of crimp influences properties of the material and fabrics made from the material, such as elasticity, bulk, resilience and texture.

[0017] As used herein, the term “degree of polymerization” (DPw) may refer to the number of monomer units and / or repeating units in a macromolecule, polymer, or oligomer molecule. The degree of polymerization may be expressed as Mn / M0, where Mn is the number-average molecular weight of the macromolecule, polymer, or oligomer molecule, and M0 is the molecular weight of the monomer or repeating unit.

[0018]

[0019] Hereinafter, the present invention will be described in more detail.

[0020] The present application relates to a lyocell material. The lyocell material can be used in smoking articles, and, without particular limitation, the lyocell material can be used in a filter for smoking articles.

[0021] According to one aspect, a first lyocell multifilament; and a second lyocell multifilament, wherein the first lyocell multifilament comprises a first monofilament having a first single fineness, and the second lyocell multifilament comprises a second monofilament having a second single fineness, wherein the first single fineness and the second single fineness are different lyocell materials provided and / or the first single fineness and the second single fineness may be different. The term "first single fineness" may also be referred to as "fineness per first monofilament" and / or "first monofilament fineness." The term "second single fineness" may also be referred to as "fineness per second monofilament" and / or "second monofilament fineness."

[0022] In some embodiments, one or more of the first lyocell multifilament and the second lyocell multifilament may be crimped.

[0023] In some embodiments, the first lyocell multifilament and the second lyocell multifilament may each be crimped.

[0024] In some embodiments, the first lyocell multifilament and the second lyocell multifilament can independently have crimps of from 3.94 to 19.69 per centimeter (10 to 50 per inch).

[0025] In some embodiments, the cross-section of the first monofilament and the cross-section of the second monofilament may be, independently of one another, heterogeneous cross-sections. Alternatively or additionally, the first monofilament comprises at least one cross-section and / or the second monofilament comprises at least one cross-section.

[0026] In some embodiments, the heteromorphic cross-section may include more than three protrusions, preferably three protrusions. Here, “protrusion” may mean a distinct, extended segment or arm extending outward from a central core or junction point of the monofilament cross-section. A heteromorphic cross-section including three protrusions may be referred to as a “Y-shaped cross-section.”

[0027] In some embodiments, a cross-section of one or more of the first monofilaments and a cross-section of one or more of the second monofilaments may be in a similarity relationship to each other. Alternatively or additionally, a cross-section of the first monofilament and a cross-section of the second monofilament may be in a similarity relationship to each other. The term “similarity relationship” may mean that (one or more) cross-sections of the first monofilament and (one or more) cross-sections of the second monofilament are substantially similar and / or have substantially the same shape.

[0028]

[0029] In some embodiments, the space occupancy of the first monofilament and the second monofilament can be, independently of each other, from 120% to 600%.

[0030] In some embodiments, the first single-stranded fiber may be greater than or equal to the second single-stranded fiber. Preferably, the first single-stranded fiber may be greater than the second single-stranded fiber.

[0031] In some embodiments, the first single fiber may be 2.22 to 8.89 dtex (2.0 to 8.0 denier).

[0032] In some embodiments, the second single fiber may be 1.67 to 6.67 dtex (1.5 to 6.0 denier).

[0033] In some embodiments, the difference between the first and second single denier counts may be from 0.22 to 7.22 dtex (0.2 to 6.5 denier). Additionally, the difference between the first and second single denier counts may be from 0.44 to 1.11 dtex (0.4 to 1.0 denier).

[0034] In some embodiments, the first lyocell multifilament and the second lyocell multifilament may be co-spinning.

[0035] In some embodiments, the lyocell material may have a total fineness of 1,667 to 6,111 tex (15,000 to 55,000 denier).

[0036] In some embodiments, for a total of 100 parts by weight of the first lyocell multifilament and the second lyocell multifilament, the first lyocell multifilament may be included in an amount of 1 to 99 parts by weight.

[0037] In some embodiments, the second lyocell multifilament may be included in an amount of 1 to 99 parts by weight for a total of 100 parts by weight of the first lyocell multifilament and the second lyocell multifilament.

[0038] In some embodiments, for every 100 parts by weight of the first lyocell multifilament, the second lyocell multifilament may be included in an amount of from 1 part by weight to 10,000 parts by weight.

[0039] In some embodiments, the lyocell material may be lyocell tow.

[0040] In some embodiments, the lyocell material may be used for a smoking article filter.

[0041] In one aspect, a filter for a smoking article is provided comprising any one of the exemplary lyocell materials.

[0042] In one aspect, a smoking article is provided comprising any one of the exemplary lyocell materials.

[0043] In one aspect, a smoking article is provided comprising any one of the exemplary smoking article filters.

[0044] In one aspect, a method for producing a lyocell material is provided, comprising a lyocell dope spinning step; and a coagulation and multifilament obtaining step.

[0045] In some embodiments, the method for manufacturing a lyocell material comprises a lyocell dope spinning step comprising spinning a first lyocell multifilament comprising a first monofilament and a second lyocell multifilament comprising a second monofilament, wherein the first single fineness of the first monofilament and the second single fineness of the second monofilament are different.

[0046] In some embodiments, the first lyocell multifilament and the second lyocell multifilament may be spun using the same lyocell dope, or may be spun using different lyocell dopes.

[0047] In some embodiments, the step of spinning the first lyocell multifilament and the step of spinning the second lyocell multifilament may be performed sequentially or simultaneously.

[0048] In some embodiments, the step of spinning the first lyocell multifilament and the step of spinning the second lyocell multifilament may be performed through the same spinneret or through different spinnerets.

[0049] In some embodiments, the step of spinning the first lyocell multifilament and the step of spinning the second lyocell multifilament may be performed simultaneously through the same spinneret.

[0050] In some embodiments, the step of spinning the first lyocell multifilament and the step of spinning the second lyocell multifilament are performed through the same spinneret, but the cross-sectional area of ​​the outlet through which the first lyocell multifilament is spun (which may be referred to as a first outlet) and the cross-sectional area of ​​the outlet through which the second lyocell multifilament is spun (which may be referred to as a second outlet) may be different.

[0051] In some embodiments, the step of spinning the first lyocell multifilament and the step of spinning the second lyocell multifilament are performed sequentially, wherein the first lyocell multifilament and the second lyocell multifilament can be coagulated and obtained in the same coagulation tank.

[0052]

[0053] A lyocell material according to an exemplary embodiment includes a first lyocell multifilament including a first monofilament and a second lyocell multifilament including a second monofilament, wherein a first single fineness of the first monofilament is different from a second single fineness of the second monofilament. Accordingly, the lyocell material according to an exemplary embodiment includes at least two types of monofilaments having different cross-sectional areas.

[0054] As a result, the lyocell material according to the exemplary embodiment can evenly enjoy the properties of the first monofilament having the first single fineness and the properties of the second monofilament having the second single fineness. In addition, by controlling the shapes of the first single fineness and the second single fineness, respectively, the physical properties of the lyocell material including the first multifilament and the second multifilament can be more finely adjusted.

[0055] Specifically, when the first single fiber density is greater than the second single fiber density, the range of achievable filter weights and the range of achievable suction resistance can be greater than that of a lyocell material comprising only one type of monofilament.

[0056] Additionally, the first single fiber density may be greater than the second single fiber density. Since the first single fiber density has a value greater than the second single fiber density, the second monofilaments may be positioned in the empty spaces between the first monofilaments, and the surface area per unit weight of the lyocell material including the first lyocell multifilament and the second lyocell multifilament may be further increased.

[0057] As a result, the lyocell material according to the exemplary embodiment can be used both for the manufacture of filters for smoking articles having a lower weight than conventional lyocell materials and for the manufacture of filters for smoking articles having a higher weight. Similarly, the lyocell material according to the exemplary embodiment can be used to achieve lower and higher suction resistance than conventional lyocell materials.

[0058] Therefore, the lyocell material according to the exemplary embodiment can provide consumers and manufacturers of smoking articles with a wider range of options in terms of diversification and optimization of filters for smoking articles.

[0059]

[0060] [Irregular cross-section]

[0061] Both the first monofilament and the second monofilament included in the lyocell material of the present application may have an irregular cross-section. "Irregular" means that the shape of the outer line of the cross-section is not circular, and the "cross-section" may be a cross-section obtained by cutting the lyocell monofilament virtually or actually perpendicular to the longitudinal direction of the filament.

[0062] The outline of the heteromorphic cross-section may be tangent to an imaginary first circle (circumcircle) and an imaginary second circle (incircle). In addition, the imaginary second circle may be depicted inside the imaginary first circle, and / or the imaginary second circle may be inside the imaginary first circle. The "imaginary first circle" may also be referred to as a "imaginary circumcircle" and / or a "circumcircle," and / or the "imaginary second circle" may also be referred to as a "imaginary incircle" and / or a "incircle."

[0063] The heterogeneous cross-section may be a shape including multiple protrusions, for example, a Y-shaped cross-section including three protrusions. The multiple protrusions may be understood as being formed integrally with the virtual second circle as the center, and their ends are in contact with the virtual first circle.

[0064] The heteromorphism of a monofilament can be defined by the following mathematical equation 1.

[0065] <Mathematical Formula 1>

[0066] Lee Hyung-do = r1 / r2

[0067] Here, r1 is the radius of the virtual first circle, and r2 is the radius of the virtual second circle.

[0068] For example, the radius of the virtual first circle may be 4 to 40 μm, the radius of the virtual second circle may be 2 to 14 μm, and the degree of heterogeneity may be 1.01 to 10.

[0069] Additionally, the space occupancy of the monofilament can be defined by mathematical expression 2.

[0070] <Mathematical Formula 2>

[0071] Space occupancy = (S1 / S2) Х 100(%)

[0072] Here, S1 is the area of ​​the imaginary first circle, and S2 is the cross-sectional area of ​​the monofilament contained in the lyocell fiber.

[0073] For example, the space occupancy of a monofilament having a heterogeneous cross-section can be 120 to 600%.

[0074] In an exemplary embodiment, the cross-section of the first monofilament and the cross-section of the second monofilament may be, independently of each other, heterogeneous cross-sections. Specifically, the cross-section of the first monofilament and the cross-section of the second monofilament may, independently of each other, include three or more protrusions. Preferably, the cross-section of the first monofilament and the cross-section of the second monofilament may both include three protrusions. More preferably, the cross-section of at least one of the first monofilaments and the cross-section of at least one of the second monofilaments may be similar to each other, and / or the cross-section of the first monofilament and the cross-section of the second monofilament may be similar to each other.

[0075] Additionally, the space occupancy ratios of the first monofilament and the second monofilament can be independently from each other 120% to 600%, or 150% to 550%, or 180% to 500%, or 200% to 450%, or 250% to 400%, or 300% to 350%.

[0076]

[0077] [Island]

[0078] The lyocell material of the present application comprises a first lyocell multifilament; and a second lyocell multifilament, wherein the first lyocell multifilament comprises a first monofilament having a first single fineness, and the second lyocell multifilament comprises a second monofilament having a second single fineness, wherein the first single fineness and the second single fineness are different. Here, the first single fineness and the second single fineness each refer to the fineness of one monofilament separated from the first lyocell multifilament or the second lyocell multifilament.

[0079] Since the first and second monofilaments are different, the properties determined by the first monofilament (e.g., mechanical properties of the first monofilament) and the properties determined by the second monofilament (e.g., mechanical properties of the second monofilament) can be expressed and enjoyed, respectively.

[0080] In exemplary lyocell materials, the first single fineness may be 2.22 to 8.89 dtex (2.0 to 8.0 denier). The upper limit of the first single fineness may be 8.89 dtex (8.0 denier) or less, 7.78 dtex (7.0 denier) or less, 7.22 dtex (6.5 denier) or less, 6.67 dtex (6.0 denier) or less, 6.11 dtex (5.5 denier) or less, 5.56 dtex (5.0 denier) or less, 5.00 dtex (4.5 denier) or less, 3.89 dtex (3.5 denier) or less, 3.33 dtex (3.0 denier) or less, or 2.78 dtex (2.5 denier) or less. And, the lower limit of the first single fiber may be 2.22 dtex (2.0 denier) or more, 2.78 dtex (2.5 denier) or more, 3.33 dtex (3.0 denier) or more, 3.89 dtex (3.5 denier) or more, 4.44 dtex (4.0 denier) or more, 5.00 dtex (4.5 denier) or more, 5.56 dtex (5.0 denier) or more, 6.11 dtex (5.5 denier) or more, 6.67 dtex (6.0 denier) or more, 7.22 dtex (6.5 denier) or more, 7.78 dtex (7.0 denier) or more, or 8.33 dtex (7.5 denier) or more. By satisfying the above range, the properties (e.g., relatively improved tensile strength) of the first monofilament can be stably provided.

[0081] In exemplary lyocell materials, the first single fiber count is 2.22 to 8.89 dtex (2.0 denier to 8.0 denier), 2.78 to 8.89 dtex (2.5 denier to 8.0 denier), 3.33 to 8.89 dtex (3.0 denier to 8.0 denier), 3.89 to 8.89 dtex (3.5 denier to 8.0 denier), 4.44 to 8.89 dtex (4.0 denier to 8.0 denier), 5.00 to 8.89 dtex (4.5 denier to 8.0 denier), 5.56 to 8.89 dtex (5.0 denier to 8.0 denier), 6.11 to 8.89 dtex (5.5 denier to 8.0 denier), 6.67 to 8.89 dtex (6.0 denier to 8.0 denier), 7.22 to 8.89 dtex (6.5 denier to 8.0 denier), 7.78 to 8.89 dtex (7.0 denier to 8.0 denier), 8.33 to 8.89 dtex (7.5 denier to 8.0 denier), 2.22 to 8.33 dtex (2.0 denier to 7.5 denier), 2.78 to 8.33 dtex (2.5 denier to 7.5 denier), 3.33 to 8.33 dtex (3.0 denier to 7.5 denier), 3.89 to 8.33 dtex (3.5 denier to 7.5 denier), 4.44 to 8.33 dtex (4.0 denier to 7.5 denier), 5.00 to 8.33 dtex (4.5 denier to 7.5 denier), 5.56 to 8.33 dtex (5.0 denier to 7.5 denier), 6.11 to 8.33 dtex (5.5 denier to 7.5 denier), 6.67 to 8.33 dtex (6.0 denier to 7.5 denier), 7.22 to 8.33 dtex (6.5 denier to 7.5 denier), 7.78 to 8.33 dtex (7.0 denier to 7.5 denier), 2.22 to 7.78 dtex (2.0 denier to 7.0 denier), 2.78 to 7.78 dtex (2.5 denier to 7.0 denier), 3.33 to 7.78 dtex (3.0 denier to 7.0 denier), 3.89 to 7.78 dtex (3.5 denier to 7.0 denier), 4.44 to 7.78 dtex (4.0 denier to 7.0 denier), 5.00 to 7.78 dtex (4.5 denier to 7.0 denier), 5.56 to 7.78 dtex (5.0 denier to 7.0 denier), 6.11 to 7.78 dtex (5.5 denier to 7.0 denier), 6.67 to 7.78 dtex (6.0 denier to 7.0 denier), 7.22 to 7.78 dtex (6.5 denier to 7.0 denier), 2.22 to 7.22 dtex (2.0 denier to 6.5 denier), 2.78 to 7.22 dtex (2.5 denier to 6.5 denier), 3.33 to 7.22 dtex (3.0 denier to 6.5 denier), 3.89 to 7.22 dtex (3.5 denier to 6.5 denier), 4.44 to 7.22 dtex (4.0 denier to 6.5 denier), 5.00 to 7.22 dtex (4.5 denier to 6.5 denier), 5.56 to 7.22 dtex (5.0 denier to 6.5 denier), 6.11 to 7.22 dtex (5.5 denier to 6.5 denier), dtex (6.0 denier to 6.5 denier), 2.22 to 6.67 dtex (2.0 denier to 6.0 denier, 2.78 to 6.67 dtex (2.5 denier to 6.0 denier), 3.33 to 6.67 dtex (3.0 denier to 6.0 denier), 3.89 to 6.67 dtex (3.5 denier to 6.0 denier), 4.44 to 6.67 dtex (4.0 denier to 6.0 denier), 5.00 to 6.67 dtex (4.5 denier to 6.0 denier, 5.56 to 6.67 dtex (5.0 denier to 6.0 denier), 6.11 to 6.67 dtex (5.5 denier to 6.0 denier), 2.22 to 6.11 dtex (2.0 denier to 5.5 denier), 2.78 to 6.11 dtex (2.5 denier to 5.5 denier), 3.33 to 6.11 dtex (3.0 denier to 5.5 denier), 3.89 to 6.11 dtex (3.5 denier to 5.5 denier), 4.44 to 6.11 dtex (4.0 denier to 5.5 denier), 5.00 to 6.11 dtex (4.5 denier to 5.5 denier), 5.56 to 6.11 dtex (5.0 denier to 5.5 denier), 2.22 to 5.56 dtex (2.0 denier to 5.0 denier), 2.78 to 5.56 dtex (2.5 denier to 5.0 denier), 3.33 to 5.56 dtex (3.0 denier to 5.0 denier), 3.89 to 5.56 dtex (3.5 denier to 5.0 denier), 4.44 to 5.56 dtex (4.0 denier to 5.0 denier), 5.00 to 5.56 dtex (4.5 denier to 5.0 denier), 2.22 to 5.00 dtex (2.0 denier to 4.5 denier), 2.78 to 5.00 dtex (2.5 denier to 4.5 denier), 3.33 to 5.00 dtex (3.0 denier to 4.5 denier), 3.89 to 5.00 dtex (3.5 denier to 4.5 denier), 4.44 to 5.00 dtex (4.0 denier to 4.5 denier), 2.22 to 4.44 dtex (2.0 denier to 4.0 denier), 2.89 to 4.44 dtex (2.5 denier to 4.0 denier), 3.33 to 4.44 dtex (3.0 denier to 4.0 denier), 3.89 to 4.44 dtex (3.5 denier to 4.0 denier), 2.22 to 3.89 dtex (2.0 denier to 3.5 denier), 2.78 to 3.89 dtex (2.5 denier to 3.5 denier), 3.33 to 3.89 dtex (3.0 denier to 3.5 denier), 2.22 to 3.33 dtex (2.0 denier to 3.0 denier), 2.78 to 3.It may be 33 dtex (2.5 denier to 3.0 denier), or 2.22 to 2.78 dtex (2.0 denier to 2.5 denier).

[0082] In some embodiments, the second single fineness can be from 1.67 to 6.67 dtex (1.5 to 6.0 denier). The upper limit of the second single fineness can be no more than 6.67 dtex (6.0 denier), no more than 6.11 dtex (5.5 denier), no more than 5.56 dtex (5.0 denier), no more than 5.00 dtex (4.5 denier), no more than 3.89 dtex (3.5 denier), no more than 3.33 dtex (3.0 denier), or no more than 2.78 dtex (2.5 denier). And, the lower limit of the second single fiber count may be 1.67 dtex (1.5 denier) or more, 2.22 dtex (2.0 denier) or more, 2.78 dtex (2.5 denier) or more, 3.33 dtex (3.0 denier) or more, 3.89 dtex (3.5 denier) or more, 4.44 dtex (4.0 denier) or more, 5.00 dtex (4.5 denier) or more, 5.56 dtex (5.0 denier) or more, 6.11 dtex (5.5 denier) or more, 6.67 dtex (6.0 denier) or more, 7.22 dtex (6.5 denier) or more, 7.78 dtex (7.0 denier) or more, or 8.33 dtex (7.5 denier) or more. By satisfying the above range, the properties (e.g., relatively improved specific surface area) of the second monofilament can be stably provided.

[0083] In exemplary lyocell materials, the second single fiber count is 1.67 to 6.67 dtex (1.5 denier to 6.0 denier), 2.22 to 6.67 dtex (2.0 denier to 6.0 denier), 2.78 to 6.67 dtex (2.5 denier to 6.0 denier), 3.33 to 6.67 dtex (3.0 denier to 6.0 denier), 3.89 to 6.67 dtex (3.5 denier to 6.0 denier), 4.44 to 6.67 dtex (4.0 denier to 6.0 denier), 5.00 to 6.67 dtex (4.5 denier to 6.0 denier), 5.56 to 6.67 dtex (5.0 denier to 6.0 denier), 6.11 to 6.67 dtex (5.5 denier to 6.0 denier), 1.67 to 6.11 dtex (1.5 denier to 5.5 denier), 2.22 to 6.11 dtex (2.0 denier to 5.5 denier), 2.78 to 6.11 dtex (2.5 denier to 5.5 denier), 3.33 to 6.11 dtex (3.0 denier to 5.5 denier), 3.89 to 6.11 dtex (3.5 denier to 5.5 denier), 4.44 to 6.11 dtex (4.0 denier to 5.5 denier), 5.00 to 6.11 dtex (4.5 denier to 5.5 denier), 5.56 to 6.11 dtex (5.0 denier to 5.5 denier), 1.67 to 5.56 dtex (1.5 denier to 5.0 denier), 2.22 to 5.56 dtex (2.0 denier to 5.0 denier), 2.78 to 5.56 dtex (2.5 denier to 5.0 denier), 3.33 to 5.56 dtex (3.0 denier to 5.0 denier), 3.89 to 5.56 dtex (3.5 denier to 5.0 denier), 4.44 to 5.56 dtex (4.0 denier to 5.0 denier), 5.00 to 5.56 dtex (4.5 denier to 5.0 denier), 1.67 to 5.00 dtex (1.5 denier to 4.5 denier), 2.22 to 5.00 dtex (2.0 denier to 4.5 denier), 2.78 to 5.00 dtex (2.5 denier to 4.5 denier), 3.33 to 5.00 dtex (3.0 denier to 4.5 denier), 3.89 to 5.00 dtex (3.5 denier to 4.5 denier), 4.44 to 5.00 dtex (4.0 denier to 4.5 denier), 1.67 to 4.44 dtex (1.5 denier to 4.0 denier), 2.22 to 4.44 dtex (2.0 denier to 4.0 denier), 2.78 to 4.44 dtex (2.5 denier to 4.0 denier), 3.33 to 4.44 dtex (3.0 denier to 4.0 denier), 3.89 to 4.44 dtex (3.5 denier to 4.0 denier), 1.67 to 3.89 dtex (1.5 denier to 3.5 denier), 2.22 to 3.89 dtex (2.0 denier to 3.5 denier), 2.78 to 3.89 dtex (2.5 denier to 3.5 denier), 3.33 to 3.89 dtex (3.0 denier to 3.5 denier), 1.67 to 3.33 dtex (1.5 denier to 3.0 denier), 2.22 to 3.33 dtex (2.0 denier to 3.0 denier), 2.78 to 3.33 dtex (2.5 denier to 3.0 denier), It may be 1.67 to 2.78 dtex (1.5 denier to 2.5 denier), 2.22 to 2.78 dtex (2.0 denier to 2.5 denier), or 1.67 to 2.22 dtex (1.5 denier to 2.0 denier).

[0084] In an exemplary lyocell material, the difference between the first and second single denier counts may be 0.22 to 7.22 dtex (0.2 to 6.5 denier). Specifically, the difference between the first single fiber and the second single fiber is 0.56 to 7.22 dtex (0.5 to 6.5 denier), 1.11 to 7.22 dtex (1.0 denier to 6.5 denier), 1.67 to 7.22 dtex (1.5 denier to 6.5 denier), 2.22 to 7.22 dtex (2.0 denier to 6.5 denier), 2.78 to 7.22 dtex (2.5 denier to 6.5 denier), 3.33 to 7.22 dtex (3.0 denier to 6.5 denier), 3.89 to 7.22 dtex (3.5 denier to 6.5 denier), 4.44 to 7.22 dtex (4.0 denier to 6.5 denier), 5.00 to 7.22 dtex (4.5 denier to 6.5 denier), 5.56 to 7.22 dtex (5.0 denier to 6.5 denier), 6.11 to 7.22 dtex (5.5 denier to 6.5 denier), 6.67 to 7.22 dtex (6.0 denier to 6.5 denier), 0.56 to 6.67 dtex (0.5 denier to 6.0 denier), 1.11 to 6.67 dtex (1.0 denier to 6.0 denier), 1.67 to 6.67 dtex (1.5 denier to 6.0 denier), 2.22 to 6.67 dtex (2.0 denier to 6.0 denier), 2.78 to 6.67 dtex (2.5 denier to 6.0 Denier), 3.33 to 6.67 dtex (3.0 denier to 6.0 denier), 3.89 to 6.67 dtex (3.5 denier to 6.0 denier), 4.44 to 6.67 dtex (4.0 denier to 6.0 denier), 5.00 to 6.67 dtex (4.5 denier to 6.0 denier), 5.56 to 6.67 dtex (5.0 denier to 6.0 denier), 6.11 to 6.67 dtex (5.5 denier to 6.0 denier), 0.56 to 6.11 dtex (0.5 denier to 5.5 denier), 1.11 to 6.11 dtex (1.0 denier to 5.5 denier), 1.67 to 6.11 dtex (1.5 denier to 5.5 denier), 2.22 to 6.11 dtex (2.0 denier to 5.5 denier), 2.78 to 6.11 dtex (2.5 denier to 5.5 denier), 3.33 to 6.11 dtex (3.0 denier to 5.5 denier), 3.89 to 6.11 dtex (3.5 denier to 5.5 denier), 4.44 to 6.11 dtex (4.0 denier to 5.5 denier), 5.00 to 6.11 dtex (4.5 denier to 5.5 denier), 5.56 to 6.11 dtex (5.0 denier to 5.5 denier), 0.56 to 5.56 dtex (0.5 denier to 5.0 denier), 1.11 to 5.56 dtex (1.0 denier to 5.0 denier), 1.67 to 5.56 dtex (1.5 denier to 5.0 denier), 2.22 to 5.56 dtex (2.0 denier to 5.0 denier), 2.78 to 5.56 dtex (2.5 denier to 5.0 denier), 3.33 to 5.56 dtex (3.0 denier to 5.0 denier), 3.89 to 5.56 dtex (3.5 denier to 5.0 denier), 4.44 to 5.56 dtex (4.0 denier to 5.0 denier), 5.00 to 5.56 dtex (4.5 denier to 5.0 denier), 0.56 to 5.00 dtex (0.5 denier to 4.5 denier), 1.11 to 5.00 dtex (1.0 denier to 4.5 denier), 1.67 to 5.00 dtex (1.5 denier to 4.5 denier), 2.22 to 5.00 dtex (2.0 denier to 4.5 denier), 2.78 to 5.00 dtex (2.5 denier to 4.5 denier), 3.33 to 5.00 dtex (3.0 denier to 4.5 denier), 3.89 to 5.00 dtex (3.5 denier to 4.5 denier), 4.44 to 5.00 dtex (4.0 denier to 4.5 denier), 0.56 to 4.44 dtex (0.5 denier to 4.0 denier), 1.11 to 4.44 dtex (1.0 denier to 4.0 denier), 1.67 to 4.44 dtex (1.5 denier to 4.0 denier), 2.22 to 4.44 dtex (2.0 denier to 4.0 denier), 2.78 to 4.44 dtex (2.5 denier to 4.0 denier), 3.33 to 4.44 dtex (3.0 denier to 4.0 denier), 3.89 to 4.44 dtex (3.5 denier to 4.0 Denier), 0.56 to 3.89 dtex (0.5 denier to 3.5 denier), 1.11 to 3.89 dtex (1.0 denier to 3.5 denier), 1.67 to 3.89 dtex (1.5 denier to 3.5 denier), 2.22 to 3.89 dtex (2.0 denier to 3.5 denier), 2.78 to 3.89 dtex (2.5 denier to 3.5 denier), 3.33 to 3.89 dtex (3.0 denier to 3.5 denier), 0.56 to 3.33 dtex (0.5 denier to 3.0 denier), 1.11 to 3.33 dtex (1.0 denier to 3.0 denier), 1.67 to 3.33 dtex (1.5 denier to 3.0 denier), 2.22 to 3.33 dtex (2.0 denier to 3.0 denier), 2.78 to 3.33 dtex (2.5 denier to 3.0 denier), 0.56 to 2.78 dtex (0.5 denier to 2.5 denier), 1.11 to 2.78 dtex (1.0 denier to 2.5 denier), 1.67 to 2.78 dtex (1.5 denier to 2.5 denier), 2.22 to 2.78 dtex (2.0 denier to 2.5 denier), 0.56 to 2.22 dtex (0.5 denier to 2.0 denier), 1.11 to 2.22 dtex (1.0 denier to 2.0 denier), 1.67 to 2.22 dtex (1.5 denier to 2.0 denier), 0.56 to 1.67 dtex (0.5 denier to 1.5 denier), 1.11 to 1.67 dtex (1.0 denier to 1.5 denier), 0.56 to 1.11 dtex (0.5 denier to 1.0 denier), or 0.44 to 1.11 dtex (0.4 denier to 1.0 denier).

[0085] By satisfying the above range, the difference between the properties of the first monofilament and the properties of the second monofilament can be highlighted, and additional effects (e.g., an increase in surface area per unit weight) can be provided by mixing the first monofilament and the second monofilament.

[0086] In one example, the total fineness of the lyocell material may be 1,667 to 6,111 tex (15,000 to 55,000 denier), and the total fineness of the lyocell material may be calculated as the sum of the total fineness of the first lyocell multifilament and the total fineness of the second lyocell multifilament. For example, the lower limit of the total fineness is, for example, 1,778 tex (16,000 denier) or more, 1,833 tex (16,500 denier) or more, 1,889 tex (17,000 denier) or more, 1,944 tex (17,500 denier) or more, 2,000 tex (18,000 denier) or more, 2,056 tex (18,500 denier) or more, 2,111 tex (19,000 denier) or more, 2,167 tex (19,500 denier) or more, 2,222 tex (20,000 denier) or more, 2,278 tex (20,500 denier) or more, 2,333 tex (21,000 denier) or more, 2,389 21,500 denier (tex) or more, 2,444 tex (22,000 denier) or more, 2,500 tex (22,500 denier) or more, 2,556 tex (23,000 denier) or more, 2,611 tex (23,500 denier) or more, 2,667 tex (24,000 denier) or more, 2,722 tex (24,500 denier) or more, 2,778 tex (25,000 denier) or more, 2,833 tex (25,500 denier) or more, 2,889 tex (26,000 denier) or more, 2,944 tex (26,500 denier) or more, 3,000 tex (27,000 denier) or more, 3,056 tex (27,500 denier) or more, 3,111 tex (28,000 denier) or more, 3,167 tex (28,500 denier) or more, 3,222 tex (29,000 denier) or more, 3,287 tex (29,500 denier) or more, 3,333 tex (30,000 denier) or more, 3,389 tex (30,500 denier) or more, 3,444 tex (31,000 denier) or more, 3,500 tex (31,500 denier) or more, 3,556 tex (32,000 denier) or more, 3,611 tex (32,500 denier) or more, 3,667 tex (33,000 denier) or more, 3,722 tex (33,500 denier) or more, 3,778 tex (34,000 denier) or more, 3,833 tex (34,500 denier) or more, 3,889 tex (35,000 denier) or more, 3,944 tex (35,500 denier) or more, 4,000 tex (36,000 denier) or more, 4,056 tex (36,500 denier) or more, 4,111 tex (37,000 denier) or more, 4,167 tex (37,500 denier) or more, 4,222 tex (38,000 denier) or more, 4,278 tex (38,500 denier) or more, 4,333 tex (39,000 denier) or more, 4,389 tex (39,500 denier) or more, 4,444 tex (40,000 denier) or more, 4,500 tex (40,500 denier) or more, 4,556 tex (41,000 denier) or more, 4,611 tex (41,500 denier) or more, 4,667 tex (42,000 denier) or more, 4,722 tex (42,500 denier) or more, 4,778 tex (43,000 denier) or more, 4,833 tex (43,500 denier) or more, 4,889 tex (44,000 denier) or more, 4,944 tex (44,500 denier) or more, 5,000 tex (45,000 denier) or more, 5,056 tex (45,500 denier) or more, 5,111 tex (46,000 denier) or more, 5,167 tex (46,500 denier) or more, 5,222 tex (47,000 denier) or more, 5,278 tex (47,500 denier) or more, 5,333 tex (48,000 denier) or more, 5,389 tex (48,500 denier) or more, 5,444 tex (49,000 denier) or more, 5,500 tex (49,500 denier) or more, 5,556 tex (50,000 denier) or more, 5,611 tex (50,500 denier) or more, 5,667 tex (51,000 denier) or more, 5,722 tex (51,500 denier) or more, 5,778 tex (52,000 denier) or more, 5,833 tex (52,500 denier) or more, 5,889 tex (53,000 denier) or more, 5,944 tex (53,500 denier) or more, 6,000 tex (54,000 denier) or more, or 6,056 tex (54,500 denier) or more. And, the upper limit is, for example, 6,056 tex (54,500 denier) or less, 6,000 tex (54,000 denier) or less, 5,944 tex (53,500 denier) or less, 5,889 tex (53,000 denier) or less, 5,833 tex (52,500 denier) or less, 5,778 tex (52,000 denier) or less, 5,722 tex (51,500 denier) or less, 5,667 tex (51,000 denier) or less, 5,611 tex (50,500 denier) or less, 5,556 tex (50,000 denier) or less, 5,500 tex (49,500 denier) or less, 5,444 tex (49,000 denier) or less, 5,389 tex (48,500 denier) or less, 5,333 tex (48,000 denier) or less, 5,278 tex (47,500 denier) or less, 5,222 tex (47,000 denier) or less, 5,167 tex (46,500 denier) or less, 5,111 tex (46,000 denier) or less, 5,056 tex (45,500 denier) or less, 5,000 tex (45,000 denier) or less, 4,944 tex (44,500 denier) or less, 4,889 tex (44,000 denier) or less, 4,833 tex (43,500 denier) or less, 4,778 tex (43,000 denier) or less, 4,722 tex (42,500 denier) or less, 4,667 tex (42,000 denier) or less, 4,611 tex (41,500 denier) or less, 4,556 tex (41,000 denier) or less, 4,500 tex (40,500 denier) or less,4,444 tex (40,000 denier) or less, 4,389 tex (39,500 denier) or less, 4,333 tex (39,000 denier) or less, 4,278 tex (38,500 denier) or less, 4,222 tex (38,000 denier) or less, 4,167 tex (37,500 denier) or less, 4,111 tex (37,000 denier) or less, 4,056 tex (36,500 denier) or less, 4,000 tex (36,000 denier) or less, 3,944 tex (35,500 denier) or less, 3,889 tex (35,000 denier) or less, 3,833 tex (34,500 denier) or less, 3,778 tex (34,000 denier) or less, 3,722 tex (33,500 denier) or less, 3,667 tex (33,000 denier) or less, 3,611 tex (32,500 denier) or less, 3,556 tex (32,000 denier) or less, 3,500 tex (31,500 denier) or less, 3,444 tex (31,000 denier) or less, 3,389 tex (30,500 denier) or less, 3,333 tex (30,000 denier) or less, 3,278 tex (29,500 denier) or less, 3,222 tex (29,000 denier) or less, 3,167 tex (28,500 denier) or less, 3,111 tex (28,000 denier) or less, 3,056 tex (27,500 denier) or less, 3,000 tex (27,000 denier) or less, 2,944 tex (26,500 denier) or less, 2,889 tex (26,000 denier) or less, 2,833 tex (25,500 denier) or less, 2,778 tex (25,000 denier) or less, 2,722 tex (24,500 denier) or less, 2,667 tex (24,000 denier) or less, 2,611 tex (23,500 denier) or less, 2,556 tex (23,000 denier) or less, 2,500 tex (22,500 denier) or less, 2,444 tex (22,000 denier) or less, 2,389 tex (21,500 denier) or less, 2,It may be 333 tex (21,000 denier) or less, 2,278 tex (20,500 denier) or less, 2,222 tex (20,000 denier) or less, 2,167 tex (19,500 denier) or less, 2,111 tex (19,000 denier) or less, 2,056 tex (18,500 denier) or less, 2,000 tex (18,000 denier) or less, 1,944 tex (17,500 denier) or less, 1,889 tex (17,000 denier) or less, 1,833 tex (16,500 denier) or less, 1,778 tex (16,000 denier) or less, or 1,722 tex (15,500 denier) or less. If the total fineness is outside the above range, the process for manufacturing a filter for smoking articles may not be good (continuous process is not possible due to cutting), and if the amount of tow filled in the filter paper during manufacturing of a filter for smoking articles is too small or too large, it may be difficult to secure sufficient filter properties (e.g., hardness or suction resistance, etc.).

[0087] The method for measuring fineness is not particularly limited, but for example, take a 2 m sample of the lyocell material to be measured, for example, lyocell tow, and leave it in a room that is kept in a constant temperature and humidity of 20℃ and 65% humidity for 24 hours to stabilize. Fix one end of the stabilized lyocell tow, and attach a weight with a load of 2 kg to the other end. After maintaining the tow in a state of being extended by the load (stabilization) for 5 seconds, cut it into 90 cm to obtain a sample, and measure the weight of the sample (total fineness). The fineness is converted into the measured weight Х 10000 according to the denier conversion method. The single fineness of the monofilament in the sample is calculated by dividing the total fineness of the sample by the number of monofilaments in the sample.

[0088] Additionally, the total fineness of the lyocell material can be determined by the single fineness and crimp count of the monofilament. In the present application, each single fineness and crimp count can be controlled, and the total fineness of the lyocell material (e.g., lyocell tow) suitable for manufacturing a filter for a smoking article and ensuring its function can be secured.

[0089]

[0090] [Number of crimps]

[0091] In one example, the first lyocell multifilament and the second lyocell multifilament can independently have crimps of from 3.94 to 19.69 per centimeter (10 to 50 per inch). For example, the number of crimps may be 5.91 ea / cm (15 ea / inch) or more, 7.87 ea / cm (20 ea / inch) or more, 9.84 ea / cm (25 ea / inch) or more, 11.81 ea / cm (30 ea / inch) or more, 13.78 ea / cm (35 ea / inch) or more, 15.75 ea / cm (40 ea / inch) or more, or 17.72 ea / cm (45 ea / inch) or more, and the upper limit may be, for example, 17.72 ea / cm (45 ea / inch) or less, 15.75 ea / cm (40 ea / inch) or less, 13.78 ea / cm (35 ea / inch) or less, 11.81 ea / cm (30 ea / inch) or less, or 9.84 It may be less than ea / cm (25 ea / inch). The number of crimps and their uniformity can be controlled through pressure and temperature conditions, etc., related to the crimping step described below.

[0092] Although not particularly limited, the number of crimps can be measured, for example, using a single-fiber property evaluation device (e.g., Favimat). Specifically, a manufactured lyocell material (preferably, lyocell tow) sample can be left and stabilized for 24 hours under conditions of a temperature of 20±2℃ and a humidity of 65±4%. A sample can be collected from the stabilized sample so that the crimp is not damaged. The collected sample can be mounted on a dedicated jig with a length (gauge length) of 10 to 30 mm. The initial load during measurement can be 0.45 g / tex (0.05 g / denier), and the crimp sensitivity can be 0.01 mm. The number of crimps can be measured under the conditions described above (i.e., a temperature of 20±2℃ and a humidity of 65±4%).

[0093] Although not specifically limited, lyocell materials manufactured to meet the single fiber count, total fiber count, and / or crimp count described above may be used in smoking articles.

[0094]

[0095] [emulsion]

[0096] The lyocell material may include first lyocell multifilaments; second lyocell multifilaments; and an emulsion coated on at least one of the first lyocell multifilaments and the second lyocell multifilaments. In some embodiments, the emulsion is coated on the first lyocell multifilaments and the second lyocell multifilaments. The emulsion includes (a) an esterified product of a fatty acid having 16 or more carbon atoms and an aliphatic monohydric alcohol; and (b) an esterified product of sorbitan and a fatty acid having 16 or more carbon atoms. The emulsion may be applied to some or all of the monofilaments or multifilaments forming the lyocell material. In addition, the emulsion may penetrate between the filaments.

[0097] The emulsion comprising at least the above components (a) and (b) may have hydrophobic properties. As a result, the lyocell material treated with the emulsion has excellent spreading properties.

[0098] In a specific example of the present application, the lyocell material may contain a predetermined amount of the emulsion. In this case, the amount of the emulsion may refer to OPU (wt%), which will be described later. "OPU" may refer to "oil pick-up ratio." For example, the lyocell material may contain the emulsion in an amount of 0.1 wt% or more, based on 100 wt% of the total lyocell material. Specifically, the content of the emulsion may be 0.5 wt% or more, 1.0 wt% or more, 1.5 wt% or more, 2.0 wt% or more, 2.5 wt% or more, 3.0 wt% or more, specifically 3.5 wt% or more, 4.0 wt% or more, 4.2 wt% or more, 4.5 wt% or more, 5.0 wt% or more, 5.5 wt% or more, 6.0 wt% or more, 6.5 wt% or more, 7.0 wt% or more, 7.5 wt% or more, 8.0 wt% or more, 8.5 wt% or more, 9.0 wt% or more, or 9.5 wt% or more. And, the upper limit may be, for example, 20.0 wt% or less, 18.0 wt% or less, 17.0 wt% or less, 16.0 wt% or less, 15.0 wt% or less, 14.5 wt% or less, 14.0 wt% or less, 13.5 wt% or less, 13.0 wt% or less, 12.5 wt% or less, 12.0 wt% or less, 11.5 wt% or less, 11.0 wt% or less, 10.5 wt% or less, 10 wt% or less, 9.5 wt% or less, 9.0 wt% or less, 8.5 wt% or less, 8.0 wt% or less, 7.8 wt% or less, or 7.6 wt% or less.

[0099] As a method for measuring the content (OPU) of the above-mentioned emulsion, for example, an extrusion method can be used. For example, a sample (e.g., 2 to 5 g, specifically, about 2.5 g) is collected (the weight of the collected sample is referred to as the sample weight) and the sample is placed in a syringe-shaped container. The material of the container is not particularly limited, but may be SUS (stainless steel). Next, a solvent (e.g., methanol) is placed in the container into which the sample has been placed (the amount of the solvent placed may be 10 ml or less (e.g., about 8 ml)). The solvent may be placed in a dropping manner when the sample is placed, and the dropping speed is controlled uniformly. Then, the solvent placed in the container as described above is allowed to fall from one end of the syringe-shaped container onto a plate. At this time, the plate is pre-weighed (the weighed weight is referred to as plate weight A), and the plate is installed so that the solvent dropped on the plate can fly away (i.e., evaporate) at a temperature of 120 to 130°C (e.g., 125°C). The above-described solvent injection and solvent dropping are performed three times, and a pressure (e.g., 98 N / cm) is applied to the sample using a syringe-shaped container. 2 (10 kgf / cm 2 ) or less, 49 N / cm 2 (5 kgf / cm 2 ) or less or 20-39 N / cm 2 (2-4 kgf / cm 2 )) and press the sample once. This sufficiently extrudes the solvent and emulsion present in the sample. Squeeze the sample by applying pressure until no solvent comes out. Afterwards, store the plate in a desiccator for 5 to 10 minutes, and measure the weight of the plate containing the sample (plate weight B). Then, calculate the emulsion content according to the formula below.

[0100] Food

[0101] Content of emulsion by extrusion (OPU, % or wt%)

[0102] = {(Plate Weight B - Plate Weight A) / (Sample Weight)} x 100

[0103] In addition, the lyocell material that serves as the basis for the emulsion content may be a first lyocell multifilament that has been emulsion-treated and a second lyocell multifilament that has been emulsion-treated. For example, the lyocell material may be a first lyocell multifilament and / or a second lyocell multifilament to which a first emulsion treatment (which will be described below) has been applied, or a first lyocell multifilament and / or a second lyocell multifilament to which a first emulsion treatment and a second emulsion treatment (which will be described below) have been applied. In addition, the first lyocell multifilament and / or the second lyocell multifilament that has been emulsion-treated may each be crimped.

[0104] In relation to the emulsion of the present application, component (a) is a compound that can function as a type of lubricant or oil, and may be a component harmless to the human body enough to be used in food. Component (a) provides lubrication to the fibers fed into the crimper. If the lubrication is insufficient, the lyocell may clump together and not be able to escape the crimper. If the lubrication is too high, crimping may not occur properly. The content of component (a) can be controlled, as described below, taking these functions into account.

[0105] With respect to the above component (a), the type of fatty acid having 16 or more carbon atoms forming the esterified product is not particularly limited. Any fatty acid having 16 or more carbon atoms that can provide an esterified product that is harmless to the human body and can be used in food can be used.

[0106] For example, fatty acids having 16 or more carbon atoms may be saturated fatty acids and / or unsaturated fatty acids.

[0107] Saturated fatty acids include, for example, palmitic acid (hexadecanoic acid, CH3(CH2) 14COOH), margaric acid (heptadecanoic acid, CH3(CH2) 15 COOH), stearic acid (octadecanoic acid, CH3(CH2) 16 COOH), nonadecylic acid (nonadecanoic acid, CH3(CH2) 17 COOH) or arachidic acid (eicosanoic acid, CH3(CH2) 18 Examples include COOH). However, the types of saturated fatty acids available are not limited to these.

[0108] Unsaturated fatty acids include, for example, palmitoleic acid (CH3(CH2)5CH=CH(CH2)7COOH), oleic acid (CH3(CH2)7CH=CH(CH2)7COOH), and linoleic acid (C 18 H 32 O2) or arachidonic acid (C 20 H 32 O2) etc. However, the types of saturated fatty acids that can be used are not limited to these. In some embodiments, the fatty acids are selected from the group consisting of palmitic acid, margaric acid, stearic acid, nonadecylic acid, arachidic acid, palmitoleic acid, oleic acid, linoleic acid and arachidonic acid.

[0109] The upper limit of the carbon number of the fatty acid having 16 or more carbon atoms is not particularly limited, but may be, for example, 40 or less, 36 or less, 32 or less, 28 or less, 24 or less, or 20 or less.

[0110] With respect to the above component (a), the type of aliphatic monohydric alcohol forming it is not particularly limited. Any aliphatic monohydric alcohol capable of providing an ester compound that is harmless to the human body and suitable for use in food may be used.

[0111] For example, it can be a saturated fatty alcohol or an unsaturated fatty alcohol, and they can have a linear or branched form.

[0112] In one example, the carbon number of the aliphatic monohydric alcohol may be 1 to 40. Specifically, the carbon number of the aliphatic monohydric alcohol may be, for example, 4 or more, 8 or more, 12 or more, 16 or more, or 20 or more.

[0113] Examples of the above-described aliphatic monohydric alcohols include, but are not limited to, methanol, ethanol, butanol, lauryl alcohol, isotridecanol, and stearyl alcohol. In some embodiments, the aliphatic monohydric alcohol is selected from the group consisting of methanol, ethanol, butanol, lauryl alcohol, isotridecanol, and stearyl alcohol.

[0114] In some embodiments, the component (a) may be an ester of isotridecanol and stearic acid (e.g., isotridecyl stearate). However, the types of usable component (a) are not limited thereto.

[0115] As described below, the content of the above-mentioned (a) component included in the emulsion can be adjusted in consideration of the function of the emulsion or the function of the (a) component.

[0116] The above (b) component, i.e., sorbitan and an ester of a fatty acid having 16 or more carbon atoms, is a compound that can function as a type of emulsifier and may be a component harmless to the human body enough to be used in food.

[0117] Since this component (b) has both hydrophilic and hydrophobic properties due to the polyhydric alcohol (i.e., sorbitan), it enables the component (a), which provides lubrication to the fiber, to be well dispersed in water as described below. In addition, components (a) and (b) used together not only increase the dispersibility of the emulsion as described above, but also lower the melting point, thereby ensuring the usability, handling, and stability of the emulsion. The content of the component (b) can be controlled as described below, taking these functions into consideration.

[0118] With respect to the above component (b), the type of fatty acid having 16 or more carbon atoms forming it is not particularly limited. Any fatty acid having 16 or more carbon atoms that can provide an ester compound that is harmless to the human body and can be used in food may be used.

[0119] For example, fatty acids having 16 or more carbon atoms may be saturated fatty acids and / or unsaturated fatty acids.

[0120] Saturated fatty acids include, for example, palmitic acid (hexadecanoic acid, CH3(CH2) 14 COOH), margaric acid (heptadecanoic acid, CH3(CH2) 15 COOH), stearic acid (octadecanoic acid, CH3(CH2) 16 COOH), nonadecylic acid (nonadecanoic acid, CH3(CH2) 17 COOH) or arachidic acid (eicosanoic acid, CH3(CH2) 18 Examples include COOH). However, the types of saturated fatty acids available are not limited to these.

[0121] Unsaturated fatty acids include, for example, palmitoleic acid (CH3(CH2)5CH=CH(CH2)7COOH), oleic acid (CH3(CH2)7CH=CH(CH2)7COOH), and linoleic acid (C 18 H 32 O2) or arachidonic acid (C 20 H 32 O2) etc. However, the types of saturated fatty acids that can be used are not limited to these. In some embodiments, the fatty acids are selected from the group consisting of palmitic acid, margaric acid, stearic acid, nonadecylic acid, arachidic acid, palmitoleic acid, oleic acid, linoleic acid and arachidonic acid.

[0122] The upper limit of the carbon number of the fatty acid having 16 or more carbon atoms is not particularly limited, but may be, for example, 40 or less, 36 or less, 32 or less, 28 or less, 24 or less, or 20 or less.

[0123] In a specific example of the present application, the component (b) may be an ester of sorbitan and oleic acid (e.g., sorbitan monooleate). However, the types of usable component (b) are not limited thereto.

[0124] (b) The content of the component can be adjusted in consideration of the function of the component (b) and the function of the emulsion as described above.

[0125] In one example, the emulsion may comprise 100 parts by weight of the esterified product of (a) a fatty acid having 16 or more carbon atoms and an aliphatic monohydric alcohol, and (b) 20 to 60 parts by weight of the esterified product of (sorbitan) and a fatty acid having 16 or more carbon atoms.

[0126] Specifically, the emulsion of the present application may contain the component (b) in an amount of 25 parts by weight or more, 30 parts by weight or more, 35 parts by weight or more, 40 parts by weight or more, 45 parts by weight or more, or 50 parts by weight or more, relative to 100 parts by weight of the component (a). In addition, the upper limit of the content of the component (b) relative to 100 parts by weight of the component (a) may be, for example, 55 parts by weight or less, 50 parts by weight or less, 45 parts by weight or less, 40 parts by weight or less, 35 parts by weight or less, 30 parts by weight or less, or 25 parts by weight or less. When the above content range is satisfied, the surface of the emulsion-treated lyocell multifilament or lyocell tow may have hydrophobicity.

[0127] In one example, the emulsion may include 40 to 80 wt% of (a) an esterified product of a fatty acid having 16 or more carbon atoms and an aliphatic monohydric alcohol, based on 100 wt% of the total weight of the emulsion. Specifically, the content of the (a) component may be 45 wt% or more, 50 wt% or more, 55 wt% or more, 60 wt% or more, 65 wt% or more, 70 wt% or more, or 75 wt% or more, based on 100 wt% of the total weight of the emulsion. And, the upper limit of the content may be, for example, 75 wt% or less, 70 wt% or less, 65 wt% or less, 60 wt% or less, 55 wt% or less, 50 wt% or less, or 45 wt% or less.

[0128] In one example, the emulsion may contain an excess of component (a).

[0129] In one example, the emulsion may comprise 15 to 55 wt% of (b) an esterified product of sorbitan and a fatty acid having 16 or more carbon atoms, based on 100 wt% of the total weight of the emulsion. Specifically, the content of the (b) component may be 20 wt% or more, 25 wt% or more, 30 wt% or more, 35 wt% or more, 40 wt% or more, 45 wt% or more, or 50 wt% or more, based on 100 wt% of the total weight of the emulsion. And the upper limit of the content may be, for example, 50 wt% or less, 45 wt% or less, 40 wt% or less, 35 wt% or less, 30 wt% or less, or 25 wt% or less.

[0130] In one example, the emulsion may further contain water. A small amount of water may aid in emulsification.

[0131] The content of water is not particularly limited, but may be included as the remainder after excluding the sum of the contents of components (a) and (b) from 100 wt% of the entire emulsion. The content of water included in the emulsion (i.e., the remainder after excluding the sum of the contents of the remaining components excluding water) may be, for example, 10 wt% or less, 9 wt% or less, 8 wt% or less, 7 wt% or less, 6 wt% or less, 5 wt% or less, 4 wt% or less, 3 wt% or less, 2 wt% or less, or 1 wt% or less. And, the lower limit may be, for example, 0 wt% or more, 0.1 wt% or more, 0.5 wt% or more, or 1 wt% or more.

[0132] In some embodiments, the first lyocell multifilament is a crimped first lyocell multifilament and / or a crimped and emulsified first lyocell multifilament.

[0133] In some embodiments, the second lyocell multifilament is a crimped second lyocell multifilament and / or a crimped and emulsified second lyocell multifilament.

[0134]

[0135] [Method for manufacturing lyocell material]

[0136] The present application relates to a method for manufacturing lyocell material. Through this method, lyocell material can be manufactured and used in smoking articles.

[0137] Specifically, the method for manufacturing the lyocell material includes a lyocell dope spinning step; a coagulation and multifilament obtaining step; a washing step; an emulsion treatment step; and a crimping step. In addition, the method for manufacturing the lyocell material may further include conventional steps other than the steps described above.

[0138] The emulsion treatment step may be performed before the crimping step, after the crimping step, or before and after the crimping step.

[0139] The emulsion treatment can be performed independently, for example, by spraying the emulsion of the above-described composition onto the lyocell multifilament or immersing the lyocell multifilament in the emulsion. As described above, the emulsion treatment can be performed so that the content of the emulsion in the lyocell material (e.g., OPU (wt%)) satisfies a predetermined range.

[0140] The above crimping step may be performed, for example, by applying steam and / or pressure to the lyocell multifilament.

[0141] A method for manufacturing a lyocell material according to a specific embodiment of the present application, including a milk treatment step and a crimping step, is described in more detail below. The method of the present application may be performed by including one or more of the steps described below.

[0142]

[0143] <(a) Lyocell dope radiation stage>

[0144] This step is a step of spinning lyocell dope (or spinning dope) containing lyocell cellulose (or cellulose pulp) and N-methylmorpholine-N-oxide (NMMO).

[0145] Additionally, the lyocell dope spinning step includes a step of spinning a first lyocell multifilament and a step of spinning a second lyocell multifilament. Matters relating to the first monofilament of the first lyocell multifilament and the second monofilament of the second lyocell multifilament are as described above.

[0146] In an exemplary method for manufacturing a lyocell material, the step of spinning the first lyocell multifilament and the step of spinning the second lyocell multifilament may be performed sequentially or simultaneously.

[0147] Commercially available cellulose acetate filters are identified as a major source of microplastics. However, the amine oxide solvents used in the production of lyocell fibers are recyclable and biodegrade upon disposal, and lyocell materials do not generate any pollutants during the production process. Furthermore, lyocell tow biodegrades and is removed within a relatively short period of time, making lyocell a more environmentally friendly material than cellulose acetate.

[0148] In an exemplary method for manufacturing a lyocell material, the first lyocell multifilament and the second lyocell multifilament may be spun using the same lyocell dope. As a result, the chemical properties of the first lyocell multifilament and the second lyocell multifilament may be identical or extremely identical.

[0149] Additionally, the first lyocell multifilament and the second lyocell multifilament can be spun using different lyocell dopes. As a result, the physical properties of the first lyocell multifilament and the second lyocell multifilament can be varied, and the physical properties of the lyocell material can be finely adjusted.

[0150] In one example, the content of cellulose in the spinning dope may be 5 to 15 wt% based on 100 wt% of the total weight of the dope. If the content of cellulose is too low, it is difficult to implement the characteristics of lyocell fibers, and if the content exceeds the above range, it is difficult to dissolve in a solvent. Considering this, the content of cellulose in the spinning dope may be 6 wt% or more, 7 wt% or more, 8 wt% or more, 9 wt% or more, or 10 wt% or more, and the upper limit thereof may be, for example, 14 wt% or less, 13 wt% or less, 12 wt% or less, 11 wt% or less, 10 wt% or less, or 9 wt% or less. The term "cellulose" may refer to "lyocell cellulose".

[0151] In one example, the radiation dope may include an N-methylmorpholine-N-oxide (NMMO) aqueous solution. The aqueous solution may include, for example, 80 to 95 wt% of N-methylmorpholine-N-oxide and 5 to 20 wt% of water, taking into account the degree of dissolution of cellulose and the process temperature.

[0152] In one example, the cellulose or cellulose pulp may have an alpha-cellulose content of 85 to 97 wt% relative to 100 wt% of total cellulose and / or cellulose pulp.

[0153] In one example, the cellulose or cellulose pulp may have a hemicellulose content of 3 wt% to 15 wt% relative to 100 wt% of the total cellulose and / or cellulose pulp. By controlling the hemicellulose content within the above range, stable physical properties (e.g., hardness or suction resistance implementation) and processability of the lyocell material can be more easily secured.

[0154] Additionally, in specific examples of the present application, the degree of polymerization (DPw) of the cellulose may be from 600 to 1700. In some embodiments, the degree of polymerization refers to the number of repeating units and / or monomers of the cellulose and / or hemicellulose within the cellulose pulp.

[0155] In the above-mentioned radiation step, the shape of the detention device for discharging the radiation dope is not particularly limited. For example, a donut-shaped radiation detention device may be used.

[0156] In an exemplary method for manufacturing a lyocell material, the step of spinning the first lyocell multifilament and the step of spinning the second lyocell multifilament may be performed through the same spinneret or through different spinnerets.

[0157] In addition, when the step of spinning the first lyocell multifilament and the step of spinning the second lyocell multifilament are performed simultaneously through the same spinning device, the step of spinning the first lyocell multifilament and the step of spinning the second lyocell multifilament can be performed simultaneously. As a result, the conditions for coagulating and obtaining the first lyocell multifilament and the second lyocell multifilament can be applied identically, and changes in the lyocell multifilament according to the coagulation and obtaining steps can be controlled at the same level.

[0158] The nozzle temperature of the spinneret, specifically the spin temperature, can be appropriately selected by those skilled in the art. Considering that the viscosity of the spinneret may vary depending on the spin temperature, which may impede ejection, the spin temperature may be, for example, between 100°C and 120°C or lower, or between 100°C and 110°C or lower.

[0159] In one example, the step of spinning the above-described spinning dope may be performed under controlled spinning conditions so that the first single fiber density and the second single fiber density are each controlled. For example, one or more spinning conditions among the discharge amount and the spinning speed of the above-described spinning dope may be appropriately controlled so that the first single fiber density of the filaments included in the lyocell material satisfies 2.22 to 8.89 dtex (2.0 to 8.0 denier) and the second single fiber density satisfies 1.67 to 6.67 dtex (1.5 to 6.0 denier). At this time, the first single fiber density and the second single fiber density refer to the fiber density of one whole monofilament separated from the first lyocell multifilament and the second lyocell multifilament, respectively. Preferably, the first single fiber density may be greater than the second single fiber density.

[0160] In addition, the step of spinning the above-mentioned radiant dope may be performed under controlled spinning conditions so that the first and second single fiber densities are different. For example, the cross-sectional area of ​​the first outlet through which the first lyocell multifilament is injected may be different from the cross-sectional area of ​​the second outlet through which the second lyocell multifilament is injected. In addition, the cross-sectional area of ​​the first outlet may be larger than the cross-sectional area of ​​the second outlet.

[0161] Specifically, in the exemplary lyocell material, the first single fineness may be 2.22 to 8.89 dtex (2.0 to 8.0 denier). The upper limit of the first single fineness may be 8.89 dtex (8.0 denier) or less, 7.78 dtex (7.0 denier) or less, 7.22 dtex (6.5 denier) or less, 6.67 dtex (6.0 denier) or less, 6.11 dtex (5.5 denier) or less, 5.56 dtex (5.0 denier) or less, 5.00 dtex (4.5 denier) or less, 3.89 dtex (3.5 denier) or less, 3.33 dtex (3.0 denier) or less, or 2.78 dtex (2.5 denier) or less. And, the lower limit of the second single fiber may be 2.22 dtex (2.0 denier) or more, 2.78 dtex (2.5 denier) or more, 3.33 dtex (3.0 denier) or more, 3.89 dtex (3.5 denier) or more, 4.44 dtex (4.0 denier) or more, 5.00 dtex (4.5 denier) or more, 5.56 dtex (5.0 denier) or more, 6.11 dtex (5.5 denier) or more, 6.67 dtex (6.0 denier) or more, 7.22 dtex (6.5 denier) or more, 7.78 dtex (7.0 denier) or more, or 8.33 dtex (7.5 denier) or more. By satisfying the above range, the properties (e.g., relatively improved tensile strength) of the first monofilament can be stably provided.

[0162] In some embodiments, the second single fineness can be from 1.67 to 6.67 dtex (1.5 to 6.0 denier). The upper limit of the first single fineness can be no more than 6.67 dtex (6.0 denier), no more than 6.11 dtex (5.5 denier), no more than 5.56 dtex (5.0 denier), no more than 5.00 dtex (4.5 denier), no more than 3.89 dtex (3.5 denier), no more than 3.33 dtex (3.0 denier), or no more than 2.78 dtex (2.5 denier). And, the lower limit of the second single fiber count may be 1.67 dtex (1.5 denier) or more, 2.22 dtex (2.0 denier) or more, 2.78 dtex (2.5 denier) or more, 3.33 dtex (3.0 denier) or more, 3.89 dtex (3.5 denier) or more, 4.44 dtex (4.0 denier) or more, 5.00 dtex (4.5 denier) or more, 5.56 dtex (5.0 denier) or more, 6.11 dtex (5.5 denier) or more, 6.67 dtex (6.0 denier) or more, 7.22 dtex (6.5 denier) or more, 7.78 dtex (7.0 denier) or more, or 8.33 dtex (7.5 denier) or more. By satisfying the above range, the properties (e.g., relatively improved specific surface area) of the second monofilament can be stably provided.

[0163] In the exemplary method for manufacturing lyocell material, the cross-section of the first outlet and the cross-section of the second outlet may be independently of each other and have a deformed cross-section. In addition, the deformed cross-section may include three or more protrusions. In addition, the deformed cross-section may be a Y-shaped cross-section. The terms mentioned herein have the same meanings as described above.

[0164] Additionally, at least one cross-section of the first outlet and at least one cross-section of the second outlet may be similar to each other. In some embodiments, the cross-section of the first outlet and the cross-section of the second outlet may be similar to each other. The terms mentioned herein have the same meaning as described above.

[0165] The radiation dope discharged through the radiation detention can go through the coagulation step described below.

[0166]

[0167] <(b) Coagulation and multifilament production step>

[0168] In this step, the radiated lyocell radiant dope is coagulated, and lyocell multifilament can be obtained.

[0169] The above coagulation may be carried out in a manner in which the radiant dope comes into contact with air and / or a coagulating liquid.

[0170] In one example, the solidification may include a first solidification step of supplying cooling air to the radiated lyocell dope; and a second solidification step of introducing the first-solidified radiated dope into a solidification solution to solidify it.

[0171] According to the above-described solidification method, the lyocell dope discharged from the spinneret can be primarily solidified in the space (air gap section) between the spinneret and the solidification tank. For example, cooling air can be supplied from the inside of the spinneret to the outside of the spinneret through this air gap section from an air-cooling unit located inside the spinneret. Alternatively, primary solidification can be achieved by a so-called air quenching method or means known in the relevant field.

[0172] In one example, the upper temperature limit of the cooling air used for primary solidification may be, for example, 15°C or lower. Specifically, the cooling air may be air having a temperature of 14°C or lower, 13°C or lower, 12°C or lower, 11°C or lower, or 10°C or lower. If the temperature exceeds the temperature, the solidification of the radiation dope by the air is not sufficient, and the radiation-related processability is poor.

[0173] The lower limit of the cooling air temperature may be determined by considering factors such as the spinning processability and / or the cross-sectional uniformity of the filament. For example, if the temperature of the cooling air is below 4°C, the surface of the spinneret cools, the surface of the filament becomes uneven, and the spinning processability also deteriorates. Considering this, the cooling air temperature may be 5°C or higher, 6°C or higher, 7°C or higher, 8°C or higher, or 9°C or higher.

[0174] The degree to which the cooling air is supplied can be controlled taking into account sufficient coagulation, spinning processability, and the influence on the physical properties of the filament. For example, 70 to 400 Nm 3 / h can be supplied to the radiation dope derived from the air volume. More specifically, the air volume is 100 Nm 3 / h or more, 150 Nm 3 / h or more, 200 Nm 3 / h or more or 250 Nm 3 / h or more, and the upper limit of the airflow is, for example, 350 Nm 3 / h or less, 300 Nm 3 / h or less, 250 Nm 3 / h or less, 200 Nm 3 / h or less or 150 Nm 3 / h can be less than or equal to.

[0175] After the primary coagulation as described above, the cooled spinning dope can be supplied to a coagulation tank or bath containing a coagulating solution (secondary coagulation stage). For proper coagulation, the temperature of the coagulating solution can be, for example, 30°C or lower or 25°C or lower. Furthermore, the temperature of the coagulating solution can be 10°C or higher, 15°C or higher, or 20°C or higher. Maintaining the temperature above allows for an appropriate coagulation rate to be maintained.

[0176] The type of coagulant for the secondary coagulation step described above is not particularly limited. For example, the coagulant may include one or more of water and N-methylmorpholine-N-oxide (NMMO).

[0177] Although not particularly limited, when the coagulant contains water and NMMO, the water content in the coagulant may be 60 to 90 wt% and the NMMO content may be 10 to 40 wt% based on 100 wt% of the total weight of the coagulant. Alternatively, the coagulant may contain 70 to 80 wt% of water and 20 to 30 wt% of NMMO based on 100 wt% of the total weight of the coagulant. The concentration of the coagulant may be controlled to be maintained during the manufacturing process using a sensor or the like.

[0178] In an exemplary method for manufacturing a lyocell material, the step of spinning a first lyocell multifilament and the step of spinning a second lyocell multifilament can be performed simultaneously, and the first lyocell multifilament and the second lyocell multifilament can be coagulated and obtained in the same coagulation tank.

[0179] In an exemplary method for manufacturing a lyocell material, the step of spinning a first lyocell multifilament and the step of spinning a second lyocell multifilament are performed sequentially, and the first lyocell multifilament and the second lyocell multifilament can be coagulated and obtained in the same coagulation tank.

[0180]

[0181] <(c) Washing stage>

[0182] If necessary, each lyocell multifilament may be washed after the above-described coagulation and multifilament harvesting steps. This washing may remove any remaining NMMO and / or other impurities within the filament.

[0183] The method of washing is not particularly limited. For example, washing can be accomplished by introducing each coagulated lyocell multifilament into a washing tank using a traction roller. Alternatively, washing can be accomplished by spraying the washing solution onto the lyocell multifilament as it moves to the next stage via a traction roller.

[0184] The components of the washing liquid are not particularly limited. For example, the washing liquid may contain water and may also contain known additives.

[0185] In addition, considering reuse after washing, etc., the washing liquid may be used at a temperature adjusted to 100°C or lower.

[0186]

[0187] <(d) Milk processing stage>

[0188] If necessary, each lyocell multifilament may be subjected to an emulsion treatment step. This step involves applying an emulsion containing the aforementioned ingredients to the surface of the filament. This emulsion treatment reduces friction on the filament and facilitates crimp formation during the crimp application step described below. If the emulsion treatment is performed two or more times, as described below, the process may be referred to as a primary emulsion treatment or a secondary emulsion treatment, depending on the order of application.

[0189] Although not particularly limited, the emulsion treatment may be carried out by immersing each lyocell multifilament in a bath filled with emulsion so that each lyocell multifilament is completely submerged in the emulsion. Alternatively, the emulsion may be treated by spraying the emulsion liquid while being moved to the next stage by a traction roller.

[0190] After the emulsion treatment as described above, in order to ensure that the amount of emulsion applied to each lyocell multifilament is constant, an additional process may be performed in which a roll, etc., positioned before and / or after the emulsion treatment step squeezes out the emulsion from the surface of the lyocell multifilament.

[0191] In one example, the emulsion treatment may be performed such that the oil content (OPU: oil pick up ratio (weight %)) is 1.0 wt% or more, based on at least 100 wt% of the emulsion-treated first lyocell multifilament and the second multifilament. In this case, the emulsion-treated first lyocell multifilament and / or the emulsion-treated second lyocell multifilament may be, for example, each lyocell multifilament to which the first emulsion treatment has been applied, each lyocell multifilament to which the first emulsion treatment and the second emulsion treatment have been applied (see description below). In addition, the first lyocell multifilament and / or the second lyocell multifilament to which the emulsion treatment has been applied as described above may be crimped.

[0192] Specifically, the content of the emulsion in at least the first lyocell multifilament and the second lyocell multifilament treated with the emulsion may be 0.5 wt% or more, 1.0 wt% or more, 1.5 wt% or more, 2.0 wt% or more, 2.5 wt% or more, 3.0 wt% or more, specifically 3.5 wt% or more, 4.0 wt% or more, 4.2 wt% or more, 4.5 wt% or more, 5.0 wt% or more, 5.5 wt% or more, 6.0 wt% or more, 6.5 wt% or more, 7.0 wt% or more, 7.5 wt% or more, 8.0 wt% or more, 8.5 wt% or more, 9.0 wt% or more, or 9.5 wt% or more, based on 100 wt% of the total weight of the first lyocell multifilament and / or the second lyocell multifilament treated with the emulsion. And, the upper limit may be, for example, 20.0 wt% or less, 18.0 wt% or less, 17.0 wt% or less, 16.0 wt% or less, 15.0 wt% or less, 14.5 wt% or less, 14.0 wt% or less, 13.5 wt% or less, 13.0 wt% or less, 12.5 wt% or less, 12.0 wt% or less, 11.5 wt% or less, 11.0 wt% or less, 10.5 wt% or less, 10 wt% or less, 9.5 wt% or less, 9.0 wt% or less, 8.5 wt% or less, 8.0 wt% or less, 7.8 wt%, or 7.6 wt% or less. In this case, the content may mean the dry weight after evaporation of a solvent (e.g., water) or a liquid component that may be included in the emulsion.

[0193] When the emulsion of the above-described composition is processed within the above content range, the hydrophilic properties of the lyocell material can be supplemented.

[0194] In some cases, drying of the emulsion may be performed after the emulsion treatment as described above.

[0195] In a specific example of the present application, one or more of the steps described above may be controlled so that the first single fineness can be 2.22 to 8.89 dtex (2.0 to 8.0 denier). In addition, one or more of the steps described above may be controlled so that the second single fineness can be 1.67 to 6.67 dtex (1.5 to 6.0 denier). Here, the first single fineness and the second single fineness refer to the fineness of a single monofilament separated from the first lyocell multifilament or the second lyocell multifilament, respectively. In a preferred embodiment, one or more of the steps described above may be controlled so that the first single fineness is greater than the second single fineness.

[0196] Specifically, in the exemplary lyocell material, the first single fineness may be 2.22 to 8.89 dtex (2.0 to 8.0 denier). The upper limit of the first single fineness may be 8.89 dtex (8.0 denier) or less, 7.78 dtex (7.0 denier) or less, 7.22 dtex (6.5 denier) or less, 6.67 dtex (6.0 denier) or less, 6.11 dtex (5.5 denier) or less, 5.56 dtex (5.0 denier) or less, 5.00 dtex (4.5 denier) or less, 3.89 dtex (3.5 denier) or less, 3.33 dtex (3.0 denier) or less, or 2.78 dtex (2.5 denier) or less. And, the lower limit of the second single fiber may be 2.22 dtex (2.0 denier) or more, 2.78 dtex (2.5 denier) or more, 3.33 dtex (3.0 denier) or more, 3.89 dtex (3.5 denier) or more, 4.44 dtex (4.0 denier) or more, 5.00 dtex (4.5 denier) or more, 5.56 dtex (5.0 denier) or more, 6.11 dtex (5.5 denier) or more, 6.67 dtex (6.0 denier) or more, 7.22 dtex (6.5 denier) or more, 7.78 dtex (7.0 denier) or more, or 8.33 dtex (7.5 denier) or more. By satisfying the above range, the properties (e.g., relatively improved tensile strength) of the first monofilament can be stably provided.

[0197] In some embodiments, the second single fineness can be from 1.67 to 6.67 dtex (1.5 to 6.0 denier). The upper limit of the first single fineness can be no more than 6.67 dtex (6.0 denier), no more than 6.11 dtex (5.5 denier), no more than 5.56 dtex (5.0 denier), no more than 5.00 dtex (4.5 denier), no more than 3.89 dtex (3.5 denier), no more than 3.33 dtex (3.0 denier), or no more than 2.78 dtex (2.5 denier). And, the lower limit of the second single fiber count may be 1.67 dtex (1.5 denier) or more, 2.22 dtex (2.0 denier) or more, 2.78 dtex (2.5 denier) or more, 3.33 dtex (3.0 denier) or more, 3.89 dtex (3.5 denier) or more, 4.44 dtex (4.0 denier) or more, 5.00 dtex (4.5 denier) or more, 5.56 dtex (5.0 denier) or more, 6.11 dtex (5.5 denier) or more, 6.67 dtex (6.0 denier) or more, 7.22 dtex (6.5 denier) or more, 7.78 dtex (7.0 denier) or more, or 8.33 dtex (7.5 denier) or more. By satisfying the above range, the properties (e.g., relatively improved specific surface area) of the second monofilament can be stably provided.

[0198] Although not particularly limited, the step controlled to ensure the range of the first and / or second single fibers described above may be the spinning step described above. Alternatively, the spinning, coagulation, washing, and emulsion treatment steps described above may all be controlled to ensure the range of the first and / or second single fibers described above.

[0199]

[0200] <(e) Crimp application step>

[0201] The crimping step is a step in which pressure is applied to the emulsion-treated first lyocell multifilament and / or the second lyocell multifilament by steam and / or a press roller to obtain a crimped multifilament, preferably a crimped tow. The crimping step may be referred to as a crimping step. In the present specification, the terms "emulsion-treated" and "emulsified" may be used interchangeably.

[0202] Crimping imparts waves to each lyocell multifilament, giving the fibers bulky characteristics. Crimping can be performed using any known crimping device, such as a stuffer box and / or a steam box. The usable crimping device is not particularly limited, as long as it can impart one or more of the pressures described below.

[0203] In one example, the crimping step may be performed by first supplying steam to each lyocell multifilament to preheat and swell each lyocell multifilament, and then pressing each lyocell multifilament with a press roller to form wrinkles in the lyocell multifilament. In this case, a steam box may be used for supplying steam, and the steam box may be located upstream of the crimping device.

[0204] In one example, the crimping step can be performed in such a way that the pressurization of the lyocell multifilament by the press roller and the application of steam are performed simultaneously.

[0205] In one example, the crimping step may be performed by first supplying steam to each lyocell multifilament to preheat and swell each lyocell multifilament, and then simultaneously applying pressure and steam to each lyocell multifilament by a press roller.

[0206] In one example, the crimping step applies a pressure of 0.98 to 19.61 N / cm to each lyocell multifilament prior to feeding into the crimping device (specifically, the press roller). 2 (0.1 to 2.0 kgf / cm 2 ) can be performed while applying steam.

[0207] For example, 1.96 N / cm 2 (0.2 kgf / cm 2 ) or more, 2.94 N / cm 2 (0.3 kgf / cm 2 ) or more, 3.92 N / cm 2 (0.4 kgf / cm 2 ) or more, 4.90 N / cm 2 (0.5 kgf / cm 2 ) or more or 5.88 N / cm 2 (0.6 kgf / cm 2 ) or more steam can be provided by a steam box. In addition, 14.71 N / cm 2 (1.5 kgf / cm 2 ) below, 13.73 N / cm 2 (1.4 kgf / cm 2 ) or less, 12.75 N / cm 2 (1.3 kgf / cm 2 ) below, 11.77 N / cm 2 (1.2 kgf / cm 2 ) below, 10.79 N / cm 2 (1.1 kgf / cm 2 ) or less or 9.81 N / cm 2 (1.0 kgf / cm 2 ) below steam may be provided. If the steam supply amount or pressure is below the above-mentioned range, the crimp may not be formed smoothly. In addition, if it exceeds the above-mentioned range, the flexibility of the filament increases, and excessive crimping is applied to the filament within the crimping device, so that it may not pass through the crimping device.

[0208] In one example, the crimping step may be performed by pressing each lyocell multifilament with a press roller to form crimps in each lyocell multifilament. Furthermore, steam may not be supplied prior to pressurization, steam may not be supplied simultaneously with pressurization, or steam may not be supplied both prior to pressurization and simultaneously with pressurization.

[0209] In one example, the crimping step applies a pressure of 14.71 to 39.23 N / cm to each lyocell multifilament fed into the crimping device independently using a press roller. 2 (1.5 to 4.0 kgf / cm 2 ) can be performed while applying pressure.

[0210] For example, 15.69 N / cm 2 (1.6 kgf / cm 2 ) above, 16.67 N / cm 2 (1.7 kgf / cm 2 ) or more, 17.65 N / cm 2 (1.8 kgf / cm 2 ) above, 18.63 N / cm 2 (1.9 kgf / cm 2 ) above, 19.61 N / cm 2 (2.0 kgf / cm 2 ) or more, 20.60 N / cm 2 (2.1 kgf / cm 2 ) above, 21.58 N / cm 2 (2.2 kgf / cm 2 ) above, 22.56 N / cm 2 (2.3 kgf / cm 2 ) above, 23.54 N / cm 2 (2.4 kgf / cm 2 ) or more or 24.52 N / cm 2 (2.5 kgf / cm 2) or more pressure can be applied to the lyocell multifilament through the press roller. Also, 38.25 N / cm 2 (3.9 kgf / cm 2 ) below, 37.27 N / cm 2 (3.8 kgf / cm 2 ) below, 36.29 N / cm 2 (3.7 kgf / cm 2 ) below, 35.31 N / cm 2 (3.6 kgf / cm 2 ) below, 34.33 N / cm 2 (3.5 kgf / cm 2 ) below, 33.35 N / cm 2 (3.4 kgf / cm 2 ) below, 32.37 N / cm 2 (3.3 kgf / cm 2 ) below, 31.39 N / cm 2 (3.2 kgf / cm 2 ) below, 30.41 N / cm 2 (3.1 kgf / cm 2 ) below, 29.42 N / cm 2 (3.0 kgf / cm 2 ) below, 28.44 N / cm 2 (2.9 kgf / cm 2 ) below, 27.46 N / cm 2 (2.8 kgf / cm 2 ) below, 26.48 N / cm 2 (2.7 kgf / cm 2 ) or less, 25.50 N / cm 2 (2.6 kgf / cm 2 ) or less or 24.52 N / cm 2 (2.5 kgf / cm 2 ) The following pressure can be applied by the press roller.

[0211] The pressure of the press roller is within the above range. If the pressure is less than the above range, the desired number of crimps may not be sufficiently formed. Furthermore, if the roller pressure exceeds the above range, the pressing force may be too strong, preventing the filament from being smoothly fed into the crimping device or passing through the stuffer box. Wrinkles may form in the lyocell multifilament due to the press roller providing the above pressure.

[0212] In one example, using the top plate, the pressure on each lyocell multifilament was 0.98 to 19.61 N / cm. 2 (0.1 to 2 kgf / cm 2 ) can be applied independently of each other. In addition, the upper plate can apply pressure to each lyocell multifilament as it passes through or is passing through the press roller.

[0213] For example, the pressure applied by the upper plate is 1.96 N / cm 2 (0.2 kgf / cm 2 ) or more, 2.94 N / cm 2 (0.3 kgf / cm 2 ) or more, 3.92 N / cm 2 (0.4 kgf / cm 2 ) or more, or 4.90 N / cm 2 (0.5 kgf / cm 2 ) may be more than 14.71 N / cm. Also, 2 (1.5 kgf / cm 2 ) below, 13.73 N / cm 2 (1.4 kgf / cm 2 ) or less, 12.75 N / cm 2 (1.3 kgf / cm 2 ) below, 11.77 N / cm 2 (1.2 kgf / cm 2 ) below, 10.79 N / cm 2 (1.1 kgf / cm 2 ) or less or 9.81 N / cm 2 (1.0 kgf / cm 2) below the pressure can be applied by the upper plate.

[0214] Furthermore, after the lyocell multifilament passes through the press roller, the upper plate can move up and down to provide uniform crimp. The pressure of the upper plate is 0.98 N / cm 2 (0.1 kgf / ㎠) or less, the upper plate may not be fixed due to the pressure inside the crimp device, so the lyocell multifilament may stay in the crimp device for a short time, and the desired number of crimps may not be applied. In addition, the lyocell multifilament may stay in the crimp device for a long time, and the continuity of the process may not be maintained. If the pressure of the upper plate is 19.61 N / cm 2 (2 kgf / cm 2 ) exceeds, the lyocell multifilament may not be smoothly discharged from the crimp device, and the shape of the crimp may be formed irregularly.

[0215] In one example, the crimping step may employ a doctor blade that applies a predetermined pressure to each lyocell multifilament. The doctor blade controls the residence time of the filaments fed into the crimper stuffer box, thereby contributing to the control of the number of crimps. Such a doctor blade may be positioned, for example, in the path of each lyocell multifilament as it is pressed by the roller described above and then discharged from the roller pressure point.

[0216] In one example, the crimping step is performed by applying a crimping force of 0.98 to 19.61 N / cm to each lyocell multifilament independently through the roller of the crimping device using a doctor blade. 2 (0.1 to 2.0 kgf / cm 2 ) can be performed while applying pressure.

[0217] For example, the pressure applied by the doctor blade is 1.96 N / cm2 (0.2 kgf / cm 2 ) or more, 2.94 N / cm 2 (0.3 kgf / cm 2 ) or more, 3.92 N / cm 2 (0.4 kgf / cm 2 ) or more, or 4.90 N / cm 2 (0.5 kgf / cm 2 ) may be more than 14.71 N / cm. Also, 2 (1.5 kgf / cm 2 ) below, 13.73 N / cm 2 (1.4 kgf / cm 2 ) or less, 12.75 N / cm 2 (1.3 kgf / cm 2 ) below, 11.77 N / cm 2 (1.2 kgf / cm 2 ) below, 10.79 N / cm 2 (1.1 kgf / cm 2 ) or less or 9.81 N / cm 2 (1.0 kgf / cm 2 ) The following pressures can be applied by the doctor blade.

[0218] In one example, the crimping step may be performed at a temperature ranging from 120 to 250°C. For example, the lower limit of the temperature condition may be 125°C, 130°C, 135°C, 140°C, 145°C, or 150°C. The upper limit of the temperature condition may be 200°C, 195°C, 190°C, 185°C, 180°C, 175°C, 170°C, 165°C, or 160°C.

[0219] If the crimping step is performed at a temperature below 120°C, the shape of the crimp may not be stably maintained. If the crimping step is performed at a temperature above 250°C, the concentration of the oil content within the crimping device may increase, and the formation of the crimp may be restricted.

[0220]

[0221] <(f) Other steps>

[0222] After crimping, additional appropriate post-processing may be performed.

[0223] In one example, a secondary emulsion treatment (f1) may be additionally performed. The secondary emulsion treatment may further impart flexibility to the tow. The secondary emulsion treatment may be performed in the same manner as or in accordance with the emulsion treatment step (d) described above.

[0224] Specifically, secondary emulsion treatment can be performed by applying emulsion to lyocell material (e.g., lyocell tow) that has undergone a crimper process. This can be advantageous in various processes performed during the manufacturing of filters for smoking articles. For example, secondary emulsion treatment can not only ensure that the fibers and filter are easily spreadable in air during the spreading process, but also limit fiber breakage during the drawing process.

[0225] Even in cases where the secondary emulsion treatment as described above is performed, the secondary emulsion treatment process can be performed so that the content of the emulsion or OPU content in the material satisfies the range described above.

[0226] In one example, a drying process (f2) may be additionally performed. This drying process may be performed, for example, at a temperature ranging from 100 to 130°C. The drying process method or method is not particularly limited, and any known technique may be utilized. For example, this may be accomplished by applying hot air to the tow, passing the tow through a temperature-controlled room for a set period of time, or leaving the tow in that room.

[0227] In one aspect, the present invention provides a lyocell material obtained by the method for producing a lyocell material as described above.

[0228] In one aspect, the present invention provides a lyocell material obtainable by the method for producing a lyocell material as described above.

[0229] [Smoking items]

[0230] Although not specifically limited, the lyocell material manufactured by the above method may be incorporated into a smoking article. The smoking article may be an aerosol-generating article. The aerosol-generating article may include an aerosol-generating material or an aerosol-forming substrate.

[0231] For example, the lyocell material may be incorporated into a combustible cigarette. As another example, the lyocell material may be incorporated into a heated cigarette, which may be used in conjunction with an aerosol generating device (not shown).

[0232] For example, when used as a heated smoking article, the smoking article may be separately inserted into an aerosol generating device. Here, the aerosol generating device may include a receiving groove in which the aerosol generating article can be received, and in addition, may include a heater for heating the aerosol generating article so as to generate an aerosol, a control unit for controlling the overall operation of the aerosol generating device, a battery for providing power used for the operation of the aerosol generating device, and a detector for recognizing that the aerosol generating article has been inserted into the aerosol generating device.

[0233] A smoking article may include a tobacco medium, a filter for a smoking article, and a wrapper, wherein the filter for the smoking article may be positioned at one end of the tobacco medium, for example, at the rear end or the front end. The tobacco medium and the filter for the smoking article may each include a single segment, or may independently include multiple segments.

[0234] The above tobacco medium comprises a tobacco substance, and the tobacco substance comprises nicotine. In addition, the tobacco medium may additionally comprise one or more excipients.

[0235] Excipients may include binders, fillers, and other additives. For example, the tobacco medium included in the tobacco medium portion may be manufactured in the form of granules containing tobacco substances and excipients.

[0236] For example, to maintain the shape, strength, and mass of the tobacco medium, a filler may be additionally included. For example, lyocell material may be included in the tobacco medium. Furthermore, lyocell material may be used as a filler.

[0237] The above wrapper can be subdivided into a cigarette paper wrapping the tobacco medium, a filter paper wrapping the filter, and a tipping wrapper combining the tobacco medium and the filter.

[0238]

[0239] [Filter for smoking items]

[0240] Lyocell material can be used in a filter for a smoking article. The lyocell material may be lyocell tow. In one example, the lyocell tow comprises a first crimped lyocell multifilament and a second crimped lyocell multifilament.

[0241] For example, the present application relates to a filter for a smoking article. The filter for the smoking article comprises a lyocell material, which may be the same as described above. Furthermore, the filter for the smoking article comprises lyocell tow, which may be the same as described above.

[0242] In addition, the lyocell material includes the emulsion in an amount of 0.1 wt% or more relative to 100 wt% of the total lyocell material. In addition, the description of the emulsion components and content according to the specific example of the present application is the same as described above.

[0243] In one example, the single fiber counts of the filaments forming the first lyocell multifilament and / or the second lyocell multifilament may independently be 1.67 to 8.89 dtex (1.5 to 8.0 denier). The specific values ​​are the same as those described above.

[0244] In one example, the total fineness of the lyocell material may be 1,667 to 6,111 tex (15,000 to 55,000 denier), and preferably, the lyocell material may be lyocell tow. The specific values ​​are the same as described above.

[0245] In one example, the first Lyocell multifilament and / or the second Lyocell multifilament imparted with crimps can independently have crimps of 3.94 to 19.69 per centimeter (10 to 50 per inch). The specific values ​​are the same as described above.

[0246] In one example, the filter for the smoking article may further include a wrapping paper (which may be referred to as a wrapping paper, a filter paper, or a filter wrapping paper). For example, the wrapping paper may be porous paper or non-porous paper that wraps the lyocell tow described above and can maintain the filter shape (e.g., a cylinder or a cylindrical shape).

[0247] In a specific example of the present application, the filter for the smoking article may have a predetermined shape and size.

[0248] For example, the filter may have a rod shape. More specifically, the filter for the smoking article may have a cylindrical shape.

[0249] Additionally, the filter may have a length of, for example, 10 to 50 mm. Specifically, the length of the filter may have a lower limit of 15 mm or more, 20 mm or more, 25 mm or more, 30 mm or more, 35 mm or more, 40 mm or more, or 45 mm or more, and an upper limit of 45 mm or less, 40 mm or less, 35 mm or less, 30 mm or less, 25 mm or less, 20 mm or less, or 15 mm or less.

[0250] In a specific example of the present application, the filter having the above length may have a circular cross-section, and the circumference of the circular cross-section may be 10 to 40 mm. For example, the lower limit of the circumference of the filter may be 15 mm or more, 20 mm or more, 25 mm or more, 30 mm or more, or 35 mm or more, and the upper limit may be 35 mm or less, 30 mm or less, 25 mm or less, 20 mm or less, or 15 mm or less.

[0251] In one example, the filter for the smoking article may include lyocell tow and filter paper. The description of the lyocell tow and filter paper is the same as described above, and thus is omitted.

[0252] The above-described paper may be porous paper or non-porous paper that can wrap the above-described lyocell tow and maintain a filter shape (e.g., a cylinder or a cylindrical shape).

[0253] In one example, when a porous paper is used, the paper may have a porosity of 10 to 50,000 CU (Coresta Unit). A Coresta Unit is 1 cm at a pressure difference of 1 kPa. 2 The volume flow rate (cm) of air passing through the substrate sample (i.e., porous paper) 3 min -1) can be defined. Specifically, the lower limit of the porosity of the above-mentioned paper may be, for example, 1000 CU or more, 5000 CU or more, 10000 CU or more, 15000 CU or more, 20000 CU or more, 25000 CU or more, 30000 CU or more, 35000 CU or more, 40000 CU or more, or 45000 CU or more, and the upper limit may be, for example, 45000 CU or less, 40000 CU or less, 35000 CU or less, 30000 CU or less, 25000 CU or less, or 20000 CU or less. In a specific example of the present application, the paper may have a porosity within a range of 22,000 to 26,000 CU or 23,000 to 25,000 CU.

[0254] In one example, the weight of the above paper is 15 to 60 g / cm 2　 It can be. Specifically, the lower limit of the basis weight of the above-mentioned paper is, for example, 20 g / cm 2 Above, 25 g / cm 2 Above, 30 g / cm 2 Above, 35 g / cm 2 Above, 40 g / cm 2 Above, 45 g / cm 2 Above, 50 g / cm 2 or more than 55 g / cm 2 It can be ideal, and the upper limit is, for example, 55 g / cm 2 Below 50 g / cm 2 Below 45 g / cm 2 Below 40 g / cm 2 Below 35 g / cm 2 Below 30 g / cm 2 Below 25 g / cm 2 Less than or equal to 20 g / cm 2 It may be less than or equal to 16 g / cm. In a specific example of the present application, the paper has a thickness of 16 g / cm. 2 Above, 17 g / cm 2 Above, 18 g / cm 2Above, 19 g / cm 2 Above, 20 g / cm 2 or more than 21 g / cm 2 Above, and 25 g / cm 2 Below, 24 g / cm 2 Below, 23 g / cm 2 Below, 22 g / cm 2 Less than or equal to 21 g / cm 2 It can have the following weights:

[0255] Although not particularly limited, the weight of the rod-shaped filter may be 50 mg or more. Specifically, the weight of the filter may have a lower limit of, for example, 100 mg or more, 150 mg or more, or 200 mg or more, and an upper limit of, for example, 500 mg or less, 450 mg or less, 400 mg or less, 350 mg or less, 300 mg or less, 250 mg or less, or 200 mg or less.

[0256] Descriptions of other smoking articles filters and materials included therein are the same as those described above, so they are omitted.

[0257]

[0258] [Method for manufacturing filters for smoking articles]

[0259] For example, the present application relates to a method for manufacturing a filter for a smoking article. The method may be a method for manufacturing a lyocell smoking article filter as described above, and may include a method for manufacturing the lyocell material described above.

[0260] Regarding the manufacturing method for a filter for smoking articles, the remaining steps, excluding the filter manufacturing step, are identical to those described for the lyocell material described above, and therefore, their description is omitted. Any descriptions that overlap with those described above are also omitted.

[0261] The steps for manufacturing a filter can be appropriately performed by those skilled in the art according to known methods. For example, a filter can be manufactured by forming a lyocell-filled paper into a rod shape. Alternatively, a filter can be manufactured by cutting a rod-shaped lyocell-filled filter paper into an appropriate length. The description of the paper is as described above.

[0262] Although not specifically limited, prior to filling the filter paper with lyocell material, additional treatment with an opening agent or plasticizer may be performed on the lyocell material. Opening the lyocell material can increase the surface area of ​​the lyocell material. For example, opening the lyocell material can be achieved by applying an external force in the longitudinal, transverse, and / or thickness directions.

[0263] Preferably, the lyocell material used in the manufacture of filters for smoking articles may be lyocell tow.

[0264] Although not particularly limited, the filter for a smoking article may additionally include known cellulose acetate multifilaments, provided that the purpose of the present invention is not impaired. The cellulose acetate multifilaments may be mixed with lyocell multifilaments. The cellulose acetate multifilaments may be included in a segment distinct from the segments containing the lyocell multifilaments.

[0265]

[0266] According to the present application, a lyocell material for a smoking article filter that can replace commercially available cellulose acetate (CA) and a filter for a smoking article comprising the same are provided. Specifically, a lyocell material is provided that can evenly enjoy the properties of a first monofilament having a first single fineness and the properties of a second monofilament having a second single fineness.

[0267]

[0268] The following specific examples of the invention will further illustrate its functions and effects. However, these examples are presented as illustrative examples and do not limit the scope of the invention in any way.

[0269]

[0270] Lyocell material was manufactured using the same process as described in the manufacturing example below. Conditions not specifically mentioned were within the scope of the above description.

[0271]

[0272] [Manufacturing example]

[0273] Cellulose pulp having an alpha-cellulose content of 93.9% and a degree of polymerization (DPw) of 820 was mixed with an NMMO / H2O solvent having a propyl gallate content of 0.01 wt% to produce a spinning dope having a concentration of 11 wt%. Then, the spinning dope was spun while appropriately adjusting the discharge amount and spinning speed while maintaining the spinning temperature at 110°C in the spinneret.

[0274] The spinning dope on the filament ejected from the spinneret was supplied to the coagulation liquid (coagulation liquid having a concentration including 75 wt% of water and 25 wt% of NMMO and a temperature of about 25°C) in the coagulation tank through the air gap section. At this time, the cooling air in the air gap section was supplied at a temperature of 8°C and a pressure of 100 Nm 3 The radiation dope was first coagulated at a flow rate of / h. In addition, the concentration of the coagulant was continuously monitored using a sensor and a refractometer.

[0275] Then, the coagulated lyocell filament was washed. Specifically, the filament was introduced into a traction roller, and the NMMO remaining within the filament was removed with a washing solution sprayed from a washing device. Then, the washed filament was immersed in a bath designed to have a predetermined emulsion concentration.

[0276] The filament is fed to a nip roll installed in the bath discharge section at 19.61 N / cm2 (2 kgf / cm 2 ) and was placed in a crimp machine for wrinkle application. The pressure of the press roller was 24.52 N / cm 2 (2.5 kgf / cm 2 ), the pressure of the doctor blade is 4.90 N / cm 2 (0.5 kgf / cm 2 ) was set to produce lyocell tow.

[0277] The total fineness of the manufactured tow was 3,333 to 5,000 tex (30,000 to 45,000 denier), and the crimp count was 5.91 to 15.75 ea / cm (15 to 40 ea / inch).

[0278]

[0279] Example 1

[0280] Lyocell tow was manufactured according to the above manufacturing example, and the spinneret included a first discharge port through which a first lyocell multifilament was injected and a second discharge port through which a second lyocell multifilament was injected.

[0281] The first single-fiber count of the first monofilament ejected from the first outlet was 2.67 dtex (2.4 denier), and the second single-fiber count of the second monofilament ejected from the second outlet was 2.22 dtex (2.0 denier).

[0282] Additionally, the number of first and second discharge ports was appropriately adjusted so that the weight ratio of the first lyocell multifilament and the second lyocell multifilament included in the lyocell tow was 90 to 10.

[0283]

[0284] Examples 2 to 5

[0285] The same procedure as in Example 1 was followed, but the number of first and second discharge ports was appropriately adjusted so that the weight ratio of the first lyocell multifilament and the second lyocell multifilament was as shown in Table 1 below.

[0286]

[0287] Example 6

[0288] Lyocell tow was manufactured according to the above manufacturing example, and the spinneret included a first discharge port through which a first lyocell multifilament was injected and a second discharge port through which a second lyocell multifilament was injected.

[0289] The first single fiber count of the first monofilament ejected from the first outlet was 7.22 dtex (6.5 denier), and the second single fiber count of the second monofilament ejected from the second outlet was 6.11 dtex (5.5 denier).

[0290] Additionally, the number of first and second discharge ports was appropriately adjusted so that the weight ratio of the first lyocell multifilament and the second lyocell multifilament included in the lyocell tow was 90 to 10.

[0291]

[0292] Examples 7 to 10

[0293] The same procedure as in Example 6 was followed, but the number of first and second discharge ports was appropriately adjusted so that the weight ratio of the first lyocell multifilament and the second lyocell multifilament was as shown in Table 1 below.

[0294]

[0295] Example 11

[0296] Lyocell tow was manufactured according to the above manufacturing example, and the spinneret included a first discharge port through which a first lyocell multifilament was injected and a second discharge port through which a second lyocell multifilament was injected.

[0297] The first single fiber count of the first monofilament ejected from the first outlet was 8.89 dtex (8.0 denier), and the second single fiber count of the second monofilament ejected from the second outlet was 1.67 dtex (1.5 denier).

[0298] Additionally, the number of first and second discharge ports was appropriately adjusted so that the weight ratio of the first lyocell multifilament and the second lyocell multifilament included in the lyocell tow was 90 to 10.

[0299]

[0300] Examples 12 to 15

[0301] The same procedure as in Example 11 was followed, but the number of first and second discharge ports was appropriately adjusted so that the weight ratio of the first lyocell multifilament and the second lyocell multifilament was as shown in Table 1 below.

[0302]

[0303] Example 16

[0304] Lyocell tow was manufactured according to the above manufacturing example, and the spinneret included a first discharge port through which a first lyocell multifilament was injected and a second discharge port through which a second lyocell multifilament was injected.

[0305] The first single fiber count of the first monofilament ejected from the first outlet was 2.22 dtex (2.0 denier), and the second single fiber count of the second monofilament ejected from the second outlet was 1.67 dtex (1.5 denier).

[0306] Additionally, the number of first and second discharge ports was appropriately adjusted so that the weight ratio of the first lyocell multifilament and the second lyocell multifilament included in the lyocell tow was 90 to 10.

[0307]

[0308] Examples 17 to 20

[0309] The same procedure as in Example 16 was followed, but the number of first and second discharge ports was appropriately adjusted so that the weight ratio of the first lyocell multifilament and the second lyocell multifilament was as shown in Table 1 below.

[0310]

[0311] Example 21

[0312] Lyocell tow was manufactured according to the above manufacturing example, and the spinneret included a first discharge port through which a first lyocell multifilament was injected and a second discharge port through which a second lyocell multifilament was injected.

[0313] The first single fiber count of the first monofilament ejected from the first outlet was 8.89 dtex (8.0 denier), and the second single fiber count of the second monofilament ejected from the second outlet was 6.67 dtex (6.0 denier).

[0314] Additionally, the number of first and second discharge ports was appropriately adjusted so that the weight ratio of the first lyocell multifilament and the second lyocell multifilament included in the lyocell tow was 90 to 10.

[0315]

[0316] Examples 22 to 25

[0317] The same procedure as in Example 21 was followed, but the number of first and second discharge ports was appropriately adjusted so that the weight ratio of the first lyocell multifilament and the second lyocell multifilament was as shown in Table 1 below.

[0318]

[0319] Comparative Example 1

[0320] Lyocell tow was manufactured according to the above manufacturing example, but the spinneret included only a first discharge port through which the first lyocell multifilament was ejected. The first single denier of the first monofilament ejected from the first discharge port was 2.67 dtex (2.4 denier).

[0321]

[0322] Comparative Example 2

[0323] Lyocell tow was manufactured according to the above manufacturing example, but the spinneret included only a second outlet through which second lyocell multifilament was ejected. The second single-fiber count of the second monofilament ejected from the second outlet was 2.22 dtex (2.0 denier).

[0324]

[0325] Comparative Example 3

[0326] Lyocell tow was manufactured according to the above manufacturing example, but the spinneret included only a first discharge port through which the first lyocell multifilament was ejected. The first single fiber count of the first monofilament ejected from the first discharge port was 7.22 dtex (6.5 denier).

[0327]

[0328] Comparative Example 4

[0329] Lyocell tow was manufactured according to the above manufacturing example, but the spinneret included only a second outlet through which second lyocell multifilament was ejected. The second single-fiber count of the second monofilament ejected from the second outlet was 6.11 dtex (5.5 denier).

[0330]

[0331] Example Comparative Example 12 3 4 5 1 2 Weight of first lyocell multifilament 9 0 7 0 5 0 3 0 1 0 0 Weight of second lyocell multifilament 1 0 3 0 5 0 7 0 9 0 1 0 0 Example Comparative Example 6 7 8 9 1 0 3 4 Weight of first lyocell multifilament 9 0 7 0 5 0 3 0 1 0 0 Weight of second lyocell multifilament 1 0 3 0 5 0 7 0 9 0 1 0 Example-1 1 1 2 1 3 1 4 1 5 Weight of first lyocell multifilament 9 0 7 0 5 0 3 0 1 0 Weight of second lyocell multifilament 1 0 3 0 5 0 7 0 9 0 Example 1 6 1 7 1 8 1 9 2 0 Weight of first lyocell multifilament 9 0 7 0 5 0 3 0 1 0 Weight of second lyocell multifilament Weight 1030507090 Example 2122232425 Weight of the first lyocell multifilament 9070503010 Weight of the second lyocell multifilament 1030507090

[0332]

[0333] Experiment 1: Filter Weight Evaluation

[0334] Filters for smoking articles were manufactured, each comprising the lyocell tow of Examples 1 to 25 and Comparative Examples 1 to 4. The filters for smoking articles were prepared in rod form. For each lyocell tow, the minimum and maximum weights that could be manufactured into a filter were measured. The measurement results are shown in Table 2 below.

[0335]

[0336] Example Comparative Example 12 3 4 5 1 2 Minimum filter weight (mg1) 4 7 0 4 6 0 4 5 0 4 6 5 4 7 0 4 8 0 4 7 0 Maximum filter weight (mg2) 1 0 0 1 0 5 0 1 0 8 0 1 0 6 5 1 0 5 0 9 8 0 9 6 0 Δ mg (mg2-mg1) 5 3 0 5 9 0 6 3 0 6 0 0 5 8 0 5 0 0 4 9 0 Example Comparative Example 6 7 8 9 1 0 3 4 Minimum filter weight (mg1) 2 3 0 2 4 0 2 5 0 2 5 5 2 6 5 2 9 0 3 0 Maximum filter weight (mg2) 5 3 0 5 5 0 5 7 0 5 7 0 5 6 0 5 2 0 5 2 0 5 2 0 Δ mg (mg2-mg1) 3 0 3 1 0 3 2 0 3 1 5 2 9 5 2 3 0 2 2 0 Example 1 1 1 2 1 3 1 4 1 5 Minimum filter weight (mg1) 2 7 0 2 6 0 2 5 0 2 5 5 2 6 0 Maximum filter Weight (mg2) 510 50 55 10 50 55 10 Δmg (mg2-mg1) 240 245 260 250 250 Example 16 17 18 19 20 Minimum filter weight (mg1) 46 5 45 5 45 0 46 0 465 Maximum filter weight (mg2) 10 10 10 5 0 10 9 0 10 6 0 10 40 Δmg (mg2-mg1) 5 45 5 9 5 6 40 60 0 575 Example 2 1 2 2 2 3 2 4 25 Minimum filter weight (mg1) 260 25 0 24 0 25 0 255 Maximum filter weight (mg2) 50 0 50 55 10 50 55 10 Δmg (mg2-mg1) 240 25 5 27 0 25 5 255

[0337]

[0338]

[0339] As confirmed in Table 2 above, the filters for smoking articles comprising lyocell tow according to Examples 1 to 5 and Examples 16 to 20 have a larger Δmg value than the filters for smoking articles comprising lyocell tow according to Comparative Examples 1 to 4. In addition, the filters for smoking articles comprising lyocell tow according to Examples 6 to 10, Examples 11 to 15 and Examples 21 to 25 have a larger Δmg value than the filters for smoking articles comprising lyocell tow according to Comparative Examples 3 to 4.

[0340] Specifically, compared to Comparative Example 1 which includes only monofilaments having a single denier of 2.67 dtex (2.4 denier) and Comparative Example 2 which includes only monofilaments having a single denier of 2.22 dtex (2.0 denier), the lyocell materials of Examples 16 to 20 which include both monofilaments having a first single denier of 2.22 dtex (2.0 denier) and monofilaments having a second single denier of 1.67 dtex (1.5 denier) can be used as a filter for smoking articles to provide a larger Δmg value by mixing monofilaments having different single denierities.

[0341] In addition, in detail, compared to Comparative Example 3 which includes only monofilaments having a single denier of 6.67 dtex (6.0 denier) and Comparative Example 4 which includes only monofilaments having a single denier of 6.11 dtex (5.5 denier), the lyocell materials of Examples 11 to 15 which include both monofilaments having a first single denier of 8.89 dtex (8.0 denier) and monofilaments having a second single denier of 1.67 dtex (1.5 denier) can be used as a filter for smoking articles to provide a larger Δmg value by mixing monofilaments having different single denierities.

[0342] Similarly, compared to Comparative Example 3 which includes only monofilaments having a single denier of 6.67 dtex (6.0 denier) and Comparative Example 4 which includes only monofilaments having a single denier of 6.11 dtex (5.5 denier), the lyocell materials of Examples 21 to 25 which include both monofilaments having a first single denier of 8.89 dtex (8.0 denier) and monofilaments having a second single denier of 6.67 dtex (6.0 denier) can be used as filters for smoking articles to provide larger Δmg values ​​by mixing monofilaments having different single denierities.

[0343] As a result, the lyocell material according to the exemplary embodiment can be used both for the production of filters for smoking articles having a lower weight and for the production of filters for smoking articles having a higher weight, by including two or more monofilaments having different single filaments, compared to the lyocell material of the comparative example which includes monofilaments having substantially one single filament.

[0344]

[0345] Experiment 2: Evaluation of the suction resistance of the filter

[0346] Filters for smoking articles were manufactured, each comprising the lyocell tow of Examples 1 to 10 and Comparative Examples 1 to 4. Each filter for smoking articles was prepared in a rod shape. For each lyocell tow, the minimum and maximum suction resistances that could be provided as a filter were measured.

[0347] The suction resistance value was calculated based on the pressure difference (mmH2O) measured at both ends of the filter for smoking articles when air was passed through at a constant rate (17.5 ml / sec) under standard conditions (22 ± 2 degrees (°C)).

[0348]

[0349] Example Comparative Example 1234512 Minimum suction resistance (mmH2O) 1 )235225220230235250245Maximum suction resistance (mmH2O) 2 )830860890865840820800ΔmmH2O(mmH2O 1 - mmH2O 2 )595635670635605570555Example Comparative Example 67891034Minimum suction resistance (mmH2O) 1 )320330370360325400420Maximum suction resistance (mmH2O) 2 )105010801100109010301000990ΔmmH2O(mmH2O 1 - mmH2O 2 )720760790730705600570Example 1112131415Minimum suction resistance (mmH2O)1 )330340380370335Maximum suction resistance (mmH2O) 2 )10601090110010801040ΔmmH2O(mmH2O 1 - mmH2O 2 )730750720710705Example 1617181920Minimum suction resistance (mmH2O) 1 )225215210225230Maximum suction resistance (mmH2O) 2 )820850870855835ΔmmH2O(mmH2O 1 - mmH2O 2 )595635660630605Example 2122232425Minimum suction resistance (mmH2O) 1 )320330375360340Maximum suction resistance (mmH2O) 2 )10401070109010751045ΔmmH2O(mmH2O 1 - mmH2O 2 )720740715715705

[0350]

[0351] As confirmed in Table 3 above, the filters for smoking articles comprising lyocell tow according to Examples 1 to 25 have a larger ΔmmH2O value than the filters for smoking articles comprising lyocell tow according to Comparative Examples 1 to 2.

[0352] In particular, as confirmed in Table 3 above, the filters for smoking articles comprising lyocell tow according to Examples 6 to 15 and Examples 21 to 25 were confirmed to have a ΔmmH2O value exceeding 700 mmH2O.

[0353] As a result, the lyocell material according to the exemplary embodiment can be used to achieve lower and higher suction resistance, respectively, compared to the lyocell material of the comparative example.

[0354] Therefore, it is expected that the lyocell material according to the exemplary embodiment will provide consumers and manufacturers of smoking articles with a wider range of choices in terms of diversification and optimization of filters for smoking articles.

Claims

1. First lyocell multifilament; and Contains a second lyocell multifilament, The above first lyocell multifilament comprises a first monofilament having a first single fiber density, The above second lyocell multifilament comprises a second monofilament having a second single fiber density, The above first and second single strands are different, Lyocell material.

2. In paragraph 1, A lyocell material, wherein at least one of the first lyocell multifilament and the second lyocell multifilament is crimped.

3. In paragraph 1, A lyocell material, wherein the cross-section of the first monofilament and the cross-section of the second monofilament are independently of each other and are of a heterogeneous cross-section.

4. In paragraph 1, A lyocell material, wherein at least one cross-section of the first monofilament and at least one cross-section of the second monofilament are similar to each other.

5. In paragraph 1, A lyocell material, wherein the space occupancy of the first monofilament and the second monofilament are independently 120% to 600%.

6. In paragraph 1, The above first single-filament yarn is larger than the above second single-filament yarn, and is a lyocell material.

7. In paragraph 1, The above first single-filament yarn is a lyocell material having a denier of 2.0 to 8.

0.

8. In paragraph 1, The second single-filament yarn is a lyocell material having a denier of 1.5 to 6.

0.

9. In paragraph 1, The above first lyocell multifilament and the above second lyocell multifilament are mixed, lyocell material.

10. In paragraph 1, The above first lyocell multifilament and the above second lyocell multifilament are co-spinning, lyocell material.

11. In paragraph 1, Lyocell material with a total denier of 15,000 to 55,000.

12. In paragraph 1, A lyocell material, wherein the first lyocell multifilament is contained in an amount of 1 to 99 parts by weight, based on 100 parts by weight of the first lyocell multifilament and the second lyocell multifilament.

13. In paragraph 1, Lyocell towine, Lyocell material.

14. In paragraph 1, Lyocell material for smoking article filters.

15. A filter for a smoking article comprising a lyocell material according to any one of claims 1 to 14.

16. A smoking article comprising a filter for a smoking article according to Article 15.

17. Lyocell dope radiation stage; and A method for producing a lyocell material, comprising the steps of coagulation and obtaining multifilaments; The above Lyocell dope spinning step comprises a step of spinning a first Lyocell multifilament comprising a first monofilament and a step of spinning a second Lyocell multifilament comprising a second monofilament, A method for manufacturing a lyocell material, wherein the first single fiber density of the first monofilament and the second single fiber density of the second monofilament are different.

18. In paragraph 17, A method for producing a lyocell material, wherein the first lyocell multifilament and the second lyocell multifilament are spun using the same lyocell dope or are spun using different lyocell dopes.

19. In Article 17, A method for manufacturing a lyocell material, wherein the step of spinning the first lyocell multifilament and the step of spinning the second lyocell multifilament are performed sequentially or simultaneously.

20. In paragraph 17, A method for manufacturing a lyocell material, wherein the step of spinning the first lyocell multifilament and the step of spinning the second lyocell multifilament are performed through the same spinneret or through different spinnerets.