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

Abstract

The present application relates to: a lyocell material; a filter for a smoking article, comprising the lyocell material; and a smoking article. The lyocell material and the filter for a smoking article, according to the present application, can replace a conventional cellulose acetate material and a filter for a smoking article, comprising same.

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 filter materials 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 into the environment, there is a need to further improve the biodegradability of smoking filter materials. 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] Another object of the present application is to optimize a process for manufacturing a filter from a lyocell material by optimizing the manner in which at least a portion of the lyocell material is dissolved during the process of manufacturing the filter from the lyocell material.

[0008] Another object of the present application is to optimize a process for manufacturing a filter from a lyocell material by optimizing the manner in which at least a portion of the lyocell material is decomposed from the lyocell material prepared in a laminated form, such as a bale.

[0009]

[0010] According to specific examples of the present application, a lyocell material, a filter including the same, and a smoking article may be provided.

[0011] Specifically, a lyocell material comprising a crimped lyocell multifilament is provided, the lyocell material including a central portion and one or more edge portions, and satisfying the following formula 1.

[0012] [Formula 1]

[0013]

[0014] In Equation 1, C1 is the total weight of the central portion, and M1 is the total weight of the edge portion.

[0015] In addition, a filter for a lyocell smoking article can be provided, which includes a lyocell material in which the ratio of the total weight C1 of the central portion to the total weight M1 of the edge portion is 0.85 or more.

[0016] According to another specific example of the present application, a smoking article comprising the lyocell material or filter may be provided.

[0017] According to another specific example of the present application, a method for manufacturing the lyocell material, a filter comprising the same, and a smoking article may be provided.

[0018]

[0019] 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.

[0020] 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.

[0021] Hereinafter, the present invention will be described in more detail.

[0022]

[0023] 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.

[0024]

[0025] According to an example, a lyocell material comprising crimped lyocell multifilaments is provided, the lyocell material comprising a central portion and one or more edge portions, and satisfying the following formula 1.

[0026] [Formula 1]

[0027]

[0028] In Equation 1, C1 is the total weight of the central portion, and M1 is the total weight of the edge portion.

[0029] A lyocell material wherein, among the central portion and the edge portion, the edge portion is closer to one end of the lyocell material than the central portion, and the central portion is closer to the center of the lyocell material than the edge portion.

[0030] In each exemplary lyocell material, the lyocell material includes at least one turning point, and based on the longitudinal length of the lyocell material, the turning points are each located at one of the longitudinal ends, the edge portion may be a portion closer to one of the longitudinal ends, and the central portion may be a portion closer to the exact middle point of the two ends than to one of the longitudinal ends.

[0031] For each exemplary lyocell material, the number of turning points may be 3 to 30 ea.

[0032] For each exemplary lyocell material, the number of turning points is preferably 5 to 28 ea.

[0033] For each exemplary lyocell material, the number of turning points may be the total number of times the stacking direction of the lyocell multifilaments is reversed.

[0034] For each exemplary lyocell material, Equation 1 can be satisfied for all edges.

[0035] For each exemplary lyocell material, the following equation 1-1 can be satisfied.

[0036] [Formula 1-1]

[0037]

[0038] In Equation 1-1, C1 is the total weight of the central portion, and M1 is the total weight of the edge portion.

[0039] For each exemplary lyocell material, Equation 1-1 can be satisfied for all edges.

[0040] In each exemplary lyocell material, the total weight of the lyocell multifilaments arranged in the central portion may be less than or equal to the total weight of the lyocell multifilaments arranged in the edge portion.

[0041] For each exemplary lyocell material, the number of crimps may be from 3.94 ea / cm to 23.62 ea / cm (10 ea / inch to 60 ea / inch).

[0042] For each exemplary lyocell material, the number of crimps may be from 9.84 ea / cm to 19.69 ea / cm (25 ea / inch to 50 ea / inch).

[0043] For each exemplary lyocell material, the single fiber count of the lyocell multifilament may be 1.67 to 12.22 dtex (1.5 to 11.0 denier).

[0044] For each exemplary lyocell material, the single fiber count of the lyocell multifilament may be 2.22 to 6.67 dtex (2.0 to 6.0 denier).

[0045] Each exemplary lyocell material may have a total fineness of 1,667 to 6,111 tex (15,000 to 55,000 denier).

[0046] Each of the exemplary lyocell materials described above may have a total fineness of 2,222 to 5,556 tex (20,000 to 50,000 denier).

[0047] In each exemplary lyocell material, the lyocell multifilament comprises one or more monofilaments, and one or more of the monofilaments may have a non-uniform cross-section.

[0048] In each exemplary lyocell material, the lyocell multifilament comprises one or more monofilaments, and all of the monofilaments may have a heterogeneous cross-section.

[0049] An exemplary lyocell material may be lyocell tow.

[0050] Each exemplary lyocell material may be used as a filter for a smoking article.

[0051] Each exemplary lyocell material may not be suitable for tire cord or clothing use.

[0052] Meanwhile, the term "lyocell material" may be a concept that includes "a laminate of lyocell material." In order to emphasize that the lyocell material has a laminated shape, the term "a laminate of lyocell material" may be used instead of the term "lyocell material."

[0053] Additionally, a filter for a smoking article comprising any one of the exemplary lyocell materials is provided.

[0054] Additionally, a smoking article is provided, comprising any one of the exemplary filters for each smoking article.

[0055] In addition, a method for producing a lyocell material including a lyocell dope spinning step; a coagulation and lyocell multifilament obtaining step; a washing step; an emulsion treatment step; and a crimping step, further including a laminating step of the lyocell material, wherein the laminating step is performed by a laminating device, the laminating device including a body part and a supply part capable of pendulum movement, and the lyocell material is supplied through the supply part, thereby performing lamination of the lyocell material.

[0056] In an exemplary method for manufacturing lyocell material, the lamination step can be performed so that the following equation 1 is satisfied.

[0057] [Formula 1]

[0058]

[0059] In Equation 1, C1 is the total weight of the central portion, and M1 is the total weight of the edge portion.

[0060] In an exemplary method for manufacturing lyocell material, the lamination step can be performed so that the following equation 1-1 is satisfied.

[0061] [Formula 1-1]

[0062]

[0063] In Equation 1-1, C1 is the total weight of the central portion, and M1 is the total weight of the edge portion.

[0064] In an exemplary method for manufacturing a lyocell material, lamination of the lyocell material can be performed during the pendulum movement of the supply unit.

[0065] In an exemplary method for manufacturing lyocell material, the pendulum movement of the supply unit can be performed at a constant speed.

[0066] In an exemplary method for manufacturing lyocell material, the pendulum movement of the supply unit can be performed at a variable speed.

[0067] In an exemplary method for manufacturing lyocell material, the maximum angle of the pendulum movement may be 45° or less.

[0068] In an exemplary method for manufacturing lyocell material, the maximum angle of the pendulum movement may be 7° or more.

[0069] In an exemplary method for manufacturing lyocell material, the maximum movement speed (V) of the pendulum movement max ) for the minimum velocity of the above pendulum motion (V min ) can exceed 0.7.

[0070] In an exemplary method for manufacturing lyocell material, the maximum movement speed (V) of the pendulum movement max ) for the minimum velocity of the above pendulum motion (V min ) may be less than or equal to 1.

[0071]

[0072] A lyocell material according to an exemplary embodiment includes a central portion and one or more edge portions and can satisfy the following equation 1.

[0073] [Formula 1]

[0074]

[0075] In Equation 1, C1 is the total weight of the central portion, and M1 is the total weight of the edge portion.

[0076] By satisfying Equation 1, the post-processing properties of the lyocell material, such as its maritime properties, can be improved. As a result, the process costs required for manufacturing smoking article filters can be reduced.

[0077] Specifically, post-processing of the lyocell material may be performed to be incorporated into a filter for a smoking article. During or prior to the post-processing step, the lyocell material may be transported. Lyocell materials that do not satisfy Equation 1 may exhibit insufficient transportability. For example, the lyocell material may not be uniformly and continuously disintegrated during the transport process. As a result, smooth transport of the lyocell material may be restricted, and the process of manufacturing a filter for a smoking article may be delayed.

[0078] In addition, the post-processing of the lyocell material may include a step of applying an external force to the lyocell material to induce blooming of the lyocell material. In the case of a lyocell material that does not satisfy Equation 1, the blooming of the lyocell material may not occur smoothly.

[0079] More specifically, when Equation 1 is not satisfied, the disintegration of the lyocell material disposed at the edges and the disintegration of the lyocell material disposed at the center may occur to different degrees due to clumping of the lyocell material disposed at the edges. As a result, the disintegration and swelling of the lyocell material may not occur uniformly. Furthermore, due to excessive or insufficient input of the lyocell material, the process of manufacturing a filter for a smoking article may be delayed or stopped, and the cost consumed in the process of manufacturing a filter for a smoking article may increase.

[0080]

[0081] [Lyocell material]

[0082] According to an example, a lyocell material comprising crimped lyocell multifilaments is provided, the lyocell material including a central portion and one or more edge portions, and satisfying the following formula 1.

[0083] [Formula 1]

[0084]

[0085] In Equation 1, C1 is the total weight of the central portion, and M1 is greater than or equal to the total weight of the edge portion.

[0086] The term "center" may be used to refer to the center of a lyocell material or to a portion of the lyocell material disposed in the center of the lyocell material. Similarly, the term "edge" may be used to refer to the edge of the lyocell material or to a portion of the lyocell material disposed in the edge of the lyocell material. To further emphasize the lyocell material, terms such as "center lyocell" or "edge lyocell" may be used.

[0087] In an exemplary lyocell material, among the central portion and the edge portion, the edge portion may be closer to one end of the lyocell material than the central portion, and the central portion may be closer to the center of the lyocell material than the edge portion.

[0088] In the exemplary lyocell material, the lyocell material may be understood to include one central portion and two edge portions. Furthermore, the edge portions may be understood to be positioned on one side of the central portion. Specifically, the central portion and edge portions may be included in the order of edge portion-center portion-edge portion along the longitudinal direction of the lyocell material.

[0089] The above lyocell material includes one or more turning points, and based on the longitudinal length of the lyocell material, the turning points are each located at one of the longitudinal ends, and among the lyocell material, the edge may be a portion closer to one of the longitudinal ends, and the central portion may be a portion closer to the exact middle point of the two ends than to one of the longitudinal ends.

[0090] Figure 1 is a top view of an exemplary lyocell material. In Figure 1, the appearance of the lyocell material as observed from the top of the lyocell material is conceptually depicted.

[0091] Referring to Fig. 1, the lyocell material (10) is arranged to have a vertical length (A). Referring to Fig. 1, the edge (M) is a portion arranged closer to (or including) the upper or lower portion in the vertical direction than the center (C), and the center (C) is a portion arranged closer to (or including) the center in the vertical direction than the edge (M).

[0092] Also, referring to FIG. 1, the central portion (C) can be viewed as an area that includes 25% of the vertical length (A) in both directions from the exact center of the lyocell material in the vertical direction. Similarly, the edge portion (M) can be viewed as an area that includes 25% of the vertical length (A) from one of the longitudinal ends of the lyocell material in the direction of the center.

[0093] In Fig. 1, the edge portions (M) and the central portion (C) are depicted so that the vertical length along which the two edge portions (M) are arranged is the same as the vertical length along which one central portion (C) is arranged.

[0094] Also, in Fig. 1, the lyocell material is alternately laminated as a single unit. When the turning point is defined as a virtual point where the lyocell material flips over, it can be confirmed that the upper surface of the lyocell material (i.e., the surface observed from above) flips before and after the turning point. Specifically, a total of 15 different turning points can be confirmed from the lyocell material in Fig. 1.

[0095] For each exemplary lyocell material, the ratio of the total weight of the central portion (C1) to the total weight of the edge portion (M1) is 85% or more. Specifically, the ratio of the total weight of the central portion (C1) to the total weight of the edge portion (M1) may be 86% or more, 87% or more, 88% or more, 89% or more, 90% or more, 91% or more, 92% or more, 93% or more, 94% or more, 95% or more, 96% or more, 97% or more, 98% or more, 99% or more, or 100% or more.

[0096] By satisfying Equation 1, the post-processing properties of the lyocell material, such as its maritime properties, can be improved. As a result, the process costs required for manufacturing smoking article filters can be reduced.

[0097] Specifically, post-processing of the lyocell material may be performed to be incorporated into a filter for a smoking article. During or prior to the post-processing step, the lyocell material may be transported. Lyocell materials that do not satisfy Equation 1 may exhibit insufficient transportability. For example, the lyocell material may not be uniformly and continuously disintegrated during the transport process. As a result, smooth transport of the lyocell material may be restricted, and the process of manufacturing a filter for a smoking article may be delayed.

[0098] In addition, the post-processing of the lyocell material may include a step of applying an external force to the lyocell material to induce blooming of the lyocell material. In the case of a lyocell material that does not satisfy Equation 1, the blooming of the lyocell material may not occur smoothly.

[0099] More specifically, when Equation 1 is not satisfied, the disintegration of the lyocell material disposed at the edges and the disintegration of the lyocell material disposed at the center may occur to different degrees due to clumping of the lyocell material disposed at the edges. As a result, the disintegration and swelling of the lyocell material may not occur uniformly. Furthermore, due to excessive or insufficient input of the lyocell material, the process of manufacturing a filter for a smoking article may be delayed or stopped, and the cost consumed in the process of manufacturing a filter for a smoking article may increase.

[0100] For each exemplary lyocell material, the longitudinal length (A) may be 0.4 m to 1.5 m. Specifically, the longitudinal length (A) is preferably 0.5 m to 1.0 m. By satisfying the above numerical range of the longitudinal length (A), the process cost of a process for manufacturing a filter for a smoking article from a lyocell material can be reduced, and the process efficiency can be increased.

[0101] More specifically, the upper limit of the vertical length (A) may be 1.4 m or less, 1.3 m or less, 1.2 m or less, 1.1 m or less, 1.0 m or less, 0.9 m or less, 0.8 m or less, 0.7 m or less, 0.6 m or less, or 0.5 m or less. The lower limit of the vertical length (A) may be 0.5 m or more, 0.6 m or more, 0.7 m or more, 0.8 m or more, 0.9 m or more, 1.0 m or more, 1.1 m or more, 1.2 m or more, 1.3 m or more, or 1.4 m or more.

[0102] The vertical length (A) may be the vertical length of the lyocell material when viewed vertically from above the lyocell material, as illustrated in FIG. 1.

[0103] For each exemplary lyocell material, the transverse length of the lyocell material may be 0.4 m to 1.5 m. Specifically, the transverse length is preferably 0.5 m to 1.0 m. By satisfying the above numerical range of transverse length, the process cost of the process of manufacturing a filter for a smoking article from the lyocell material can be reduced, and the process efficiency can be increased.

[0104] More specifically, the upper limit of the transverse length may be 1.4 m or less, 1.3 m or less, 1.2 m or less, 1.1 m or less, 1.0 m or less, 0.9 m or less, 0.8 m or less, 0.7 m or less, 0.6 m or less, or 0.5 m or less. The lower limit of the transverse length may be 0.5 m or more, 0.6 m or more, 0.7 m or more, 0.8 m or more, 0.9 m or more, 1.0 m or more, 1.1 m or more, 1.2 m or more, 1.3 m or more, or 1.4 m or more.

[0105] The transverse length may be the transverse length of the lyocell material when viewed vertically from above the lyocell material.

[0106] For each exemplary lyocell material, the transverse length and the longitudinal length (A) may be the same. Alternatively, the transverse length and the longitudinal length (A) may be different. The transverse length and the longitudinal length (A) may be determined in consideration of a subsequent process, for example, a manufacturing process for a filter for a smoking article.

[0107] For each exemplary lyocell material, the number of transition points may be 3 to 30. Specifically, the number of transition points is preferably 5 to 28. By satisfying the above numerical range in the number of transition points, the process cost of manufacturing a filter for a smoking article from a lyocell material can be further reduced, and the process efficiency can be further increased.

[0108] For each exemplary lyocell material, the number of turning points may be the total number of times the stacking direction of the lyocell multifilaments is reversed. The reversed stacking direction causes the top surface (i.e., the surface observed from above) of the lyocell material to be reversed. Referring to Fig. 1, it can be seen that the top surface (i.e., the surface observed from above) of the lyocell material is reversed before and after the turning point.

[0109]

[0110] [Irregular cross-section]

[0111] One or more of the lyocell monofilaments 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.

[0112] The outline of the heteromorphic cross-section can be tangent to the imaginary first circle and the imaginary second circle, respectively. Furthermore, the imaginary second circle can be depicted within the imaginary first circle.

[0113] The virtual first circle may be the circle with the smallest area value among circles drawn to encompass one cross-section of the monofilament. The virtual second circle may be the circle with the largest area value among circles drawn within the cross-section of the monofilament.

[0114] If a circumscribed circle including the cross-section of the monofilament can be drawn, the virtual first circle can be said circumscribed circle. If an inscribed circle can be drawn inside the cross-section of the monofilament, the virtual second circle can be said inscribed circle.

[0115] 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.

[0116] The heteromorphism of a monofilament can be defined by the following mathematical equation 1.

[0117] <Mathematical Formula 1>

[0118] Lee Hyung-do = r1 / r2

[0119] Here, r1 is the radius of the virtual first circle, and r2 is the radius of the virtual second circle.

[0120] 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.

[0121] Additionally, the space occupancy of the monofilament can be defined by mathematical expression 2.

[0122] <Mathematical Formula 2>

[0123] Space occupancy = (S1 / S2) Х 100(%)

[0124] 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.

[0125] For example, the space occupancy of a monofilament having a heterogeneous cross-section can be 120 to 600%.

[0126]

[0127] [Island]

[0128] The lyocell material of the present application includes lyocell multifilament, and the lyocell multifilament can have a fineness suitable for manufacturing a filter for a smoking article and securing its function.

[0129] For example, the single denier of the monofilaments forming the lyocell multifilament may be 1.11 to 8.89 dtex (1.0 to 8.0 denier). In this case, the single denier of the lyocell multifilament refers to the denier of one single monofilament separated from the lyocell multifilament before crimping.

[0130] Specifically, the single fiber count of the lyocell multifilament may be, for example, 8.33 dtex (7.5 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, 4.44 dtex (4.0 denier) or less, 3.89 dtex (3.5 denier) or less, 3.33 dtex (3.0 denier) or less, 2.78 dtex (2.5 denier) or less, 2.22 dtex (2.0 denier) or less, or 1.67 dtex (1.5 denier) or less. And, the lower limit can be, for example, 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. Satisfying the above range may be more advantageous in securing stable physical properties (e.g., hardness or suction resistance implementation) and fairness of a filter for smoking articles.

[0131] For example, the lyocell material may have a total fineness of 1,667 to 6,111 tex (15,000 to 55,000 denier). For example, the lower limit of the total fineness is 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,It can be 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, 2,333 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,It may be 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 is not good (continuous process is not possible due to cutting), and when manufacturing a filter for smoking articles, it is difficult to secure sufficient filter properties (e.g., hardness or suction resistance, etc.) if the amount of tow filled in the filter paper is too little or too much.

[0132] 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 is calculated by dividing the total fineness by the number of filament strands.

[0133] The total fineness of the lyocell multifilament as described above can be determined by the single fineness and crimp count of the filament. In the present application, the single fineness and crimp count can be controlled, and a total fineness of the tow suitable for manufacturing a filter for a smoking article and ensuring its function can be secured.

[0134]

[0135] [Number of crimps]

[0136] In one example, lyocell multifilament can have crimps of 3.94 to 23.62 per centimeter (10 to 60 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, 21.65 ea / cm (55 ea / inch) or less, 19.69 ea / cm (50 ea / inch) or less, 17.72 ea / cm (45 ea / inch) or less, 15.75 ea / cm (40 ea / inch) or less, 13.78 It may be ea / cm(35 ea / inch) or less, 11.81 ea / cm(30 ea / inch) or less, or 9.84 ea / cm(25 ea / inch) or less. The number of crimps and their uniformity can be controlled through pressure and temperature conditions, etc., related to the crimping step described below.

[0137] Although not particularly limited, the number of crimps can be measured using, for example, a single fiber property evaluation device (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 0.05 g / de, 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%).

[0138] 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.

[0139]

[0140] [bookbinder]

[0141] In one non-limiting example, the lyocell material may further comprise a binder. The binder may be present, for example, on the surface of the lyocell multifilaments or between the lyocell multifilaments (or monofilaments). The binder may increase the hardness of the filter for a smoking article, thereby preventing problems such as filter jamming during the filter manufacturing process or the manufacturing process of a smoking article (e.g., cigarette).

[0142] The type of binder available is not particularly limited, and any known binder may be used as long as it does not impede the purpose of the present invention. For example, a binder that provides sufficient compatibility with the emulsion used in the present application, improves the hardness of the filter, and provides excellent bonding strength may be used.

[0143] In one non-limiting example, the binder may include a polyester-based binder, a cellulosic-based binder, and / or a vinyl-based binder.

[0144] Although not particularly limited, a polyester binder including at least one selected from the group consisting of alkylene, arylene, and heteroarylene having 5 to 12 carbon atoms may be used as the polyester binder.

[0145] Examples of cellulose-based binders that can be used include, but are not limited to, hydroxypropylmethylcellulose (HPMC), ethylcellulose (EC), and / or methylcellulose (MC), carboxymethylcellulose (CMC), etc.

[0146] Examples of vinyl binders that can be used include, but are not limited to, polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), and / or ethylene vinyl acetate (EVAc).

[0147] The method of applying (coating) the above binder to the lyocell material is described below.

[0148]

[0149] [emulsion]

[0150] The above lyocell material may include lyocell multifilaments; and an emulsion coated on the lyocell multifilaments. The emulsion may include (a) an ester of a fatty acid having 16 or more carbon atoms and an aliphatic monohydric alcohol; and (b) an ester of sorbitan and a fatty acid having 16 or more carbon atoms. The emulsion may be applied to part or all of the monofilaments or multifilaments forming the lyocell material. In addition, the emulsion may penetrate between the filaments.

[0151] 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.

[0152] In a specific example of the present application, the lyocell material may contain a predetermined amount of the emulsion. In this case, the emulsion content may refer to OPU (wt%), which will be described later. 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.

[0153] 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., 10 kgf / cm) is applied to the sample using a syringe-shaped container. 2 Below 5 kgf / cm 2 Less than or equal to 2-4 kgf / cm 2 ) and press the sample once. This sufficiently squeezes out 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.

[0154] Food

[0155] Content of emulsion by extrusion (OPU, % or wt%)

[0156] = {(Plate Weight B - Plate Weight A) / (Sample Weight)} x 100

[0157] In addition, the lyocell material that serves as the basis for the above-described emulsion content may be at least an emulsion-treated lyocell multifilament. For example, the lyocell material may be a lyocell multifilament that has been subjected to a primary emulsion treatment (described below), a lyocell multifilament that has been subjected to a primary emulsion treatment and a secondary emulsion treatment (described below), or a lyocell multifilament that has been subjected to both the above-described emulsion treatment and a binder, as described below. In addition, the lyocell multifilament that has been subjected to an emulsion and / or binder treatment may be crimped.

[0158] 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 is 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 fail to exit the crimper. If the lubrication is excessively high, crimping may not occur properly. The content of component (a) can be controlled, as described below, taking these functions into account.

[0159] With respect to the above component (a), 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.

[0160] For example, fatty acids having 16 or more carbon atoms may be saturated fatty acids and / or unsaturated fatty acids.

[0161] 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.

[0162] 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 available are not limited to these.

[0163] 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.

[0164] 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.

[0165] For example, it can be a saturated fatty alcohol or an unsaturated fatty alcohol, and they can have a linear or branched form.

[0166] 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.

[0167] Examples of the above-mentioned aliphatic monohydric alcohols include, but are not limited to, methanol, ethanol, butanol, lauryl alcohol, isotridecanol, or stearyl alcohol.

[0168] In a specific example of the present application, an ester of isotridecanol and stearic acid (e.g., isotridecyl stearate) may be used as the component (a). However, the type of component (a) that can be used is not limited thereto.

[0169] 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.

[0170] 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 is a component that is harmless to the human body enough to be used in food.

[0171] Since this component (b) has both hydrophilicity and hydrophobicity 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.

[0172] 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.

[0173] For example, fatty acids having 16 or more carbon atoms may be saturated fatty acids and / or unsaturated fatty acids.

[0174] Saturated fatty acids include, for example, palmitic acid (hexadecanoic acid, CH3(CH2) 14 COOH), margaric acid (heptadecanoic acid, CH3(CH2) 15COOH), 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.

[0175] 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 available are not limited to these.

[0176] 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.

[0177] 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.

[0178] (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.

[0179] 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.

[0180] 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.

[0181] 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.

[0182] In one example, the emulsion may contain an excess of component (a).

[0183] 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.

[0184] In one example, the emulsion may further contain water. A small amount of water may aid in emulsification.

[0185] The content of water is not particularly limited, but may be included as the remaining amount 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 remaining amount 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.

[0186]

[0187] [Method for manufacturing lyocell material]

[0188] The present application relates to a method for manufacturing lyocell material. Through this method, lyocell material can be manufactured and used in smoking articles.

[0189] 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 a binder treatment step; and other steps.

[0190] The emulsion treatment step may be performed before the crimping step, after the crimping step, or before and after the crimping step.

[0191] 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. 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.

[0192] The above crimping step may be performed, for example, by applying steam and / or pressure to the lyocell multifilament.

[0193] 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.

[0194]

[0195] <(a) Lyocell dope radiation stage>

[0196] This step is a step of spinning a lyocell spinning dope containing lyocell cellulose (or cellulose pulp) and N-methylmorpholine-N-oxide (NMMO).

[0197] 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.

[0198] 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.

[0199] 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.

[0200] 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.

[0201] In one example, the cellulose or cellulose pulp may have a hemicellulose content of 1 wt% to 15 wt% relative to 100 wt% of total cellulose. 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.

[0202] Additionally, in a specific example of the present application, the degree of polymerization (DPw) of the cellulose may be 600 to 1700.

[0203] 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.

[0204] 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.

[0205] In one example, the step of spinning the above-described spinning dope can be performed under controlled spinning conditions so that the single filament fineness can be 1.67 dtex to 8.89 dtex (1.5 denier to 8.0 denier). For example, one or more spinning conditions among the discharge amount and spinning speed of the above-described spinning dope can be appropriately controlled so that the single filament fineness included in the lyocell material can satisfy 1.67 dtex to 8.89 dtex (1.5 denier to 8.0 denier). In this case, the single filament fineness means the fineness of one monofilament separated from the multifilament.

[0206] In particular, the single fiber count of the filament may be, for example, 8.33 dtex (7.5 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, 2.78 dtex (2.5 denier) or less, or 2.22 dtex (2.0 denier) or less. And, the lower limit may be, for example, 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, or 7.78 dtex (7.0 denier) or more. Satisfying the above range may be more advantageous in implementing stable suction resistance and ensuring fairness of a filter for smoking articles.

[0207] The radiation dope discharged through the radiation detention can go through the coagulation step described below.

[0208]

[0209] <(b) Coagulation and multifilament production step>

[0210] In this step, the radiated lyocell radiant dope is coagulated, and lyocell multifilament can be obtained.

[0211] 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.

[0212] In one example, the coagulation may include a first coagulation step of supplying cooling air to the radiated lyocell dope; and a second coagulation step of introducing the first coagulated radiated dope into a coagulation solution to coagulate it.

[0213] 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 from an air-cooling unit located inside the spinneret to the inside of the spinneret. Alternatively, primary solidification can be achieved by a so-called air quenching method or method known in the relevant field.

[0214] 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.

[0215] 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.

[0216] 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 Nm3 / 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.

[0217] 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). 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.

[0218] The type of coagulant for the secondary coagulation described above is not particularly limited. For example, the coagulant may contain one or more of water and N-methylmorpholine-N-oxide (NMMO).

[0219] 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%. Alternatively, the coagulant may contain 70 to 80 wt% of water and 20 to 30 wt% of NMMO. The concentration of the coagulant may be controlled to be maintained during the manufacturing process using a sensor or the like.

[0220]

[0221] <(c) Washing stage>

[0222] If necessary, the lyocell multifilaments may be washed after the coagulation and multifilament steps described above. This washing may remove any remaining NMMO and / or other impurities within the filaments.

[0223] There are no specific restrictions on the method of washing. For example, washing can be accomplished by introducing the coagulated lyocell multifilament into a washing tank using a traction roller. Alternatively, washing can be accomplished by spraying the washing solution as the traction roller moves the lyocell multifilament to the next stage.

[0224] The components of the washing liquid are not particularly limited. For example, the washing liquid may contain water and may also contain known additives.

[0225] In addition, considering reuse after washing, etc., the washing liquid may be used at a temperature adjusted to 100°C or lower.

[0226]

[0227] <(d) Milk processing stage>

[0228] If necessary, a step of emulsifying the lyocell multifilament may be performed. 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 in 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.

[0229] Although not specifically limited, the emulsion treatment may be carried out by immersing the lyocell multifilaments in a bath filled with the emulsion so that the lyocell multifilaments are 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.

[0230] In order to ensure that the amount of emulsion applied to the lyocell multifilament after the emulsion treatment as described above 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.

[0231] In one example, the emulsion treatment may be performed so that the oil content (OPU: oil pick up ratio (wt%)) satisfies 1.0 wt% or more based on at least 100 wt% of the emulsion-treated lyocell multifilament. At this time, the emulsion-treated lyocell multifilament may be, for example, a lyocell multifilament to which a primary emulsion treatment has been applied, a lyocell multifilament to which a primary emulsion treatment and a secondary emulsion treatment (see the description below) have been applied, or a lyocell multifilament to which a binder, which will be described later, has been applied together with the emulsion treatment as described above. In addition, the lyocell multifilament to which the emulsion and / or binder treatment as described above has been applied may have crimping.

[0232] Specifically, the content of the emulsion in the at least emulsion-treated lyocell multifilament 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 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.

[0233] 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.

[0234] In some cases, drying of the emulsion may be performed after the emulsion treatment as described above.

[0235] In a specific example of the present application, one or more of the steps described above can be controlled so that the single filament fineness of the filament forming the lyocell multifilament can be from 1.67 dtex to 8.89 dtex (1.5 to 8.0 denier). The single filament fineness refers to the fineness of one single monofilament separated from the multifilament.

[0236] Specifically, the single fiber count of the filament may be, for example, 8.33 dtex (7.5 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, 2.78 dtex (2.5 denier) or less, or 2.22 dtex (2.0 denier) or less. And, the lower limit may be, for example, 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, or 7.78 dtex (7.0 denier) or more. Satisfying the above range may be more advantageous in implementing stable suction resistance and ensuring fairness of a filter for smoking articles.

[0237] Although not specifically limited, the step controlled to ensure the above-described single-fiber range may be the above-described spinning step. Alternatively, the above-described spinning, coagulation, washing, and emulsion treatment steps may all be controlled to ensure the above-described single-fiber range.

[0238]

[0239] <(e) Crimp application step>

[0240] The crimping step is a step in which pressure is applied to the emulsion-treated lyocell multifilament through 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.

[0241] Crimping imparts waves to the lyocell multifilament, giving the fibers bulky properties. 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 apply one or more of the pressures described below.

[0242] In one example, the crimping step may be performed by first supplying steam to the lyocell multifilament to preheat and swell the lyocell multifilament, and then pressing the lyocell multifilament with a press roller to form wrinkles in the lyocell multifilament. In this case, a steam box may be used for supplying the steam, and the steam box may be located upstream of the crimping device.

[0243] 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.

[0244] In one example, the crimping step may be performed by first supplying steam to the lyocell multifilament to preheat and swell the lyocell multifilament, and then simultaneously applying pressure and steam to the lyocell multifilament by a press roller.

[0245] In one example, the crimping step applies 0.1 to 2.0 kgf / cm to the lyocell multifilament before feeding it into the crimping device (specifically, the press roller). 2 It can be performed while applying steam.

[0246] For example, 0.2 kgf / cm 2 Above, 0.3 kgf / cm 2 Above, 0.4 kgf / cm 2 Above, 0.5 kgf / cm 2 or more than 0.6 kgf / cm 2 The above steam can be provided by a steam box. Also, 1.5 kgf / cm 2 Below, 1.4 kgf / cm 2 Below, 1.3 kgf / cm 2 Below, 1.2 kgf / cm 2 Below, 1.1 kgf / cm 2 Less than or equal to 1.0 kgf / cm 2 The following steam may be provided. If the steam supply or pressure falls below the above-mentioned range, the crimp may not form smoothly. Furthermore, if it exceeds the above-mentioned range, the flexibility of the filament may increase, resulting in excessive crimping within the crimping device, preventing the filament from passing through the crimping device.

[0247] In one example, the crimping step may be performed by pressing the lyocell multifilament with a press roller to form wrinkles in the 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.

[0248] In one example, the crimping step applies 1.5 to 4.0 kgf / cm to the lyocell multifilament fed into the crimping device using a press roller. 2can be performed while applying pressure.

[0249] For example, 1.6 kgf / cm 2 Above, 1.7 kgf / cm 2 Above, 1.8 kgf / cm 2 Above, 1.9 kgf / cm 2 Above, 2.0 kgf / cm 2 Above, 2.1 kgf / cm 2 Above, 2.2 kgf / cm 2 Above, 2.3 kgf / cm 2 Above, 2.4 kgf / cm 2 or more than 2.5 kgf / cm 2 The above pressure can be applied to the lyocell multifilament through the press roller. Also, 3.9 kgf / cm 2 Below, 3.8 kgf / cm 2 Below, 3.7 kgf / cm 2 Below, 3.6 kgf / cm 2 Below 3.5 kgf / cm 2 Below, 3.4 kgf / cm 2 Below, 3.3 kgf / cm 2 Below, 3.2 kgf / cm 2 Below, 3.1 kgf / cm 2 Below 3.0 kgf / cm 2 Below, 2.9 kgf / cm 2 Below, 2.8 kgf / cm 2 Below, 2.7 kgf / cm 2 Below, 2.6 kgf / cm 2 Less than or equal to 2.5 kgf / cm 2 The following pressures can be applied by the press roller:

[0250] 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.

[0251] In one example, a pressure of 0.1 to 2 kgf / cm is applied to the lyocell multifilament using the upper plate. 2 Pressure may be applied to the lyocell multifilament. Additionally, the upper plate may apply pressure to the lyocell multifilament as it passes through or passes through the press roller.

[0252] For example, the pressure applied by the upper plate is 0.2 kgf / cm 2 Above, 0.3 kgf / cm 2 Above, 0.4 kgf / cm 2 or more than 0.5 kgf / cm 2 It may be more than 1.5 kgf / cm 2 Below, 1.4 kgf / cm 2 Below, 1.3 kgf / cm 2 Below, 1.2 kgf / cm 2 Below, 1.1 kgf / cm 2 Less than or equal to 1.0 kgf / cm 2 The following pressures can be applied by the upper plate:

[0253] Furthermore, if the pressure of the upper plate, which moves up and down to provide uniform crimp after passing through the press roller, is less than 0.1 kgf / ㎠, the upper plate cannot be fixed due to the pressure inside the stopper box, so the tow remains inside the stopper box for a long time, preventing the continuity of the process from being maintained. If it exceeds 3 kgf / ㎠, the steam cannot be smoothly discharged inside the stopper box, which may result in an irregular crimp shape.

[0254] In one example, the crimping step may employ a doctor blade that applies a predetermined pressure to the 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 the lyocell multifilaments that are pressed by the roller described above and then discharged from the roller pressure point.

[0255] In one example, the crimping step uses a doctor blade to apply 0.1 to 2.0 kgf / cm to the lyocell multifilaments passed through the rollers of the crimping device. 2 can be performed while applying pressure.

[0256] For example, the pressure applied by the doctor blade is 0.2 kgf / cm 2 Above, 0.3 kgf / cm 2 Above, 0.4 kgf / cm 2 or more than 0.5 kgf / cm 2 It may be more than 1.5 kgf / cm 2 Below, 1.4 kgf / cm 2 Below, 1.3 kgf / cm 2 Below, 1.2 kgf / cm 2 Below, 1.1 kgf / cm 2 Less than or equal to 1.0 kgf / cm 2 The following pressures can be applied by the doctor blade:

[0257] In one example, the crimping step may be performed at a temperature ranging from 120 to 250°C. If the temperature is too low, the shape stabilization effect of the crimp is not good, and if the temperature is too high, the concentration of the oil content in the stuffer box may increase, making crimp formation difficult. Therefore, considering the steam pressure described above, etc., the temperature may be appropriately controlled in a range of 130°C or higher, 140°C or higher, or 150°C or higher, and 200°C or lower, 180°C or lower, or 160°C or lower.

[0258]

[0259] <(f) Binder processing step>

[0260] In one example, the method may further comprise a step of treating the lyocell multifilament obtained by the emulsion-treated or crimp-imparting step with a binder.

[0261] When manufacturing a smoking article filter using lyocell material (e.g., lyocell tow), an additional binder may be used. The binder increases the hardness of the lyocell-containing smoking article filter, thereby preventing problems such as filter jamming during the filter manufacturing process or cigarette manufacturing.

[0262] There are no specific restrictions on the method for coating the lyocell material with a binder. For example, the emulsion treatment can be performed by immersing the lyocell multifilaments in a binder (or binder solution) bath so that the lyocell multifilaments are completely submerged in the binder. Alternatively, the binder coating can be performed by spraying (or spraying) the binder (or binder solution) using a nozzle.

[0263] The types and components of available binders are as described above, so they are omitted.

[0264] In one example, the binder (or binder solution) may further include a solvent in addition to the above-described components. The solvent may include, but is not limited to, water, ethanol, propylene glycol, and / or glycerin, for example. When the binder (or binder solution) includes a solvent, the solvent content may be, for example, about 20 to 80 wt% or about 40 to 60 wt% based on 100 wt% of the total binder (or binder solution).

[0265] The above binder treatment may be performed at a level that can achieve the purpose of the above-described binder treatment. For example, the binder treatment may be performed so that the binder content satisfies a range of 20 wt% or less, for example, 8 to 15 wt%, based on 100 wt% of the emulsion and binder-treated lyocell multifilament. In this case, the content may refer to the dry weight after the solvent or liquid component that may be included in the binder has evaporated.

[0266] After the binder is coated on the lyocell multifilament, drying of the binder may be performed. The drying temperature is not particularly limited, but drying may be performed at room temperature (approximately 10 to 35°C), for example.

[0267]

[0268] <(g) Other steps>

[0269] After crimping, additional appropriate post-processing may be performed.

[0270] In one example, a secondary emulsion treatment (g1) 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.

[0271] Specifically, secondary emulsion treatment can be performed by applying emulsion to lyocell material that has undergone a crimper process. This can be beneficial for various processes involved in the manufacture of filters for smoking articles. For example, secondary emulsion treatment can not only ensure that the fibers and filter can be easily spread in air during the spreading process, but also limit fiber breakage during the drawing process.

[0272] The secondary emulsion treatment described above may be performed before or after the binder treatment. Alternatively, the secondary emulsion treatment may be performed regardless of whether the binder treatment is performed.

[0273] 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.

[0274] In one example, a drying process (g2) may be additionally performed. The 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 known techniques may be utilized. For example, the drying process may be performed by applying hot air to the lyocell material, passing the lyocell material through a temperature-controlled room for a certain period of time, or leaving the lyocell material in the room for a certain period of time.

[0275]

[0276] <(h) Lamination stage>

[0277] A lamination step of the lyocell material may be performed after the crimping step. In an exemplary method for manufacturing a lyocell material, the lamination step may be performed using a lamination device.

[0278] In addition, in the exemplary method for manufacturing lyocell material, the laminating device includes a body part and a supply part capable of pendulum movement, and lamination of the lyocell material can be performed by supplying the lyocell material through the supply part.

[0279] Fig. 2 is a conceptual diagram of a laminating device. Fig. 2 illustrates a laminating device (100) including a body portion (110) and a supply portion (120). Referring to Fig. 2, the supply portion (120) is connected to the body portion (110), and the lyocell material is transferred to the supply portion (120) through the body portion (110). The lyocell material transferred to the supply portion (120) is discharged from one end of the supply portion (120), thereby enabling lamination of the lyocell material.

[0280] In addition, FIG. 2 conceptually illustrates the pendulum motion of the supply unit (120). The supply unit (120) can perform a pendulum motion from one side to the other. For example, the supply unit (120a) located on one side can be located on the other side like the supply unit (120b) through the pendulum motion.

[0281] In addition, Fig. 2 shows the maximum angle (θ) formed by the axis of the pendulum motion and the supply unit (120b) located on the other side, the horizontal length (α) of the pendulum motion, and the vertical length (β) of the pendulum motion. The supply unit (120) can perform the pendulum motion in the vertical direction of the lyocell material. Meanwhile, the stacking device (100) can be moved in the horizontal direction of the lyocell material.

[0282] In the exemplary method for manufacturing each lyocell material, the maximum angle (θ) of the pendulum movement may be 45° or less. In addition, in the exemplary method for manufacturing the lyocell material, the maximum angle (θ) of the pendulum movement may be 7° or more.

[0283] Preferably, the upper limit of the maximum angle (θ) may be 45° or less, 44° or less, 43° or less, 42° or less, 41° or less, 40° or less, 39° or less, 38° or less, 37° or less, 36° or less, 35° or less, 34° or less, 33° or less, 32° or less, 31° or less, 30° or less, 29° or less, 28° or less, 27° or less, 26° or less, 25° or less, 24° or less, 23° or less, 22° or less, 21° or less, 20° or less, 19° or less, 18° or less, 17° or less, 16° or less, 15° or less, 14° or less, 13° or less, 12° or less, 11° or less, 10° or less, 9° or less, or 8° or less. The lower limit of the maximum angle (θ) may be 7° or more, 8° or more, 9° or more, 10° or more, 11° or more, 12° or more, 13° or more, 14° or more, 15° or more, 16° or more, 17° or more, 18° or more, 19° or more, 20° or more, 21° or more, 22° or more, 23° or more, 24° or more, 25° or more, 26° or more, 27° or more, 28° or more, 29° or more, 30° or more, 31° or more, 32° or more, 33° or more, 34° or more, 35° or more, or 36° or more.

[0284] In the exemplary method of manufacturing each lyocell material, the maximum angle (θ) of the pendulum movement is 7° to 45°. Preferably, the maximum angle (θ) of the pendulum motion is 9° to 45°, 10° to 45°, 22° to 45°, 30° to 45°, 36° to 45°, 7° to 37°, 9° to 37°, 10° to 37°, 22° to 37°, 30° to 37°, 36° to 37°, 7° to 31°, 9° to 31°, 10° to 31°, 22° to 31°, 30° to 41°, 7° to 23°, 9° to 23°, 10° to 23°, 22° to 23°, 7° to 11°, 9° to 11°, 10° to 11°, 7° to 10°, It can be 9° to 10°, or 7° to 8°.

[0285] When the maximum angle (θ) satisfies the above-described numerical range, the lamination of the lyocell material can be performed uniformly, and the post-processing properties of the lyocell material can be improved. If the maximum angle (θ) does not satisfy the upper limit, excessive changes in the speed of the pendulum movement may occur. As a result, the lyocell material may be mainly arranged at the edge.

[0286] Meanwhile, the length of the feed section (γ) can be calculated using the maximum angle (θ), the transverse length (α) of the pendulum motion, and the vertical length (β) of the pendulum motion. For example, the square of the length of the feed section (γ) is equal to the sum of the squares of the transverse length (α) and the vertical length (β). In addition, the length of the feed section (γ) can be calculated as the product of the vertical length (β) and tan(θ), or as the product of the transverse length (α) and cosec(θ).

[0287] Meanwhile, in the exemplary method for manufacturing each lyocell material, the length (γ) of the supply section may be 0.8 m to 5 m.

[0288] Preferably, the upper limit of the length (γ) of the supply portion may be 4.5 m or less, 4.0 m or less, 3.5 m or less, 3.0 m or less, 2.5 m or less, 2.0 m or less, 1.5 m or less, or 1.0 m or less. The lower limit of the length (γ) of the supply portion may be 1.0 m or more, 1.5 m or more, 2.0 m or more, 2.5 m or more, 3.0 m or more, 3.5 m or more, or 4.0 m or more.

[0289] Preferably, the length (γ) of the supply section is 1.0 m to 1.5 m, 1.0 m to 2.0 m, 1.0 m to 2.5 m, 1.0 m to 3.0 m, 1.0 m to 3.5 m, 1.0 m to 4.0 m, 1.0 m to 4.5 m, 1.5 m to 2.0 m, 1.5 m to 2.5 m, 1.5 m to 3.0 m, 1.5 m to 3.5 m, 1.5 m to 4.0 m, 1.5 m to 4.5 m, 2.0 m to 2.5 m, 2.0 m to 3.0 m, 2.0 m to 3.5 m, 2.0 m to 4.0 m, 2.0 m to 4.5 m, 2.5 m to 3.0 m, It may be 2.5 m to 3.5 m, 2.5 m to 4.0 m, 2.5 m to 4.5 m, 3.0 m to 3.5 m, 3.0 m to 4.0 m, 3.0 m to 4.5 m, 3.5 m to 4.0 m, 3.5 m to 4.5 m, or 4.0 m to 4.5 m.

[0290] When the length (γ) of the feed section satisfies the above-described numerical range, the lamination of the lyocell material can be performed uniformly, and the post-processing properties of the lyocell material can be improved. If the length (γ) of the feed section does not satisfy the lower limit, the maximum angle (θ) of the pendulum movement may become excessively large. As a result, the lyocell material may be mainly arranged at the edge.

[0291] In an exemplary method for manufacturing lyocell material, the lamination step can be performed so that the following equation 1 is satisfied.

[0292] [Formula 1]

[0293]

[0294] In Equation 1, C1 is the total weight of the central portion, and M1 is the total weight of the edge portion.

[0295] To satisfy Equation 1, the maximum angle (θ), the length of the supply section (γ), and / or the vertical length (A) of the lyocell material can be adjusted.

[0296] In an exemplary method for manufacturing lyocell material, the lamination step can be performed so that the following equation 1-1 is satisfied.

[0297] [Formula 1-1]

[0298]

[0299] In Equation 1-1, C1 is the total weight of the central portion, and M1 is the total weight of the edge portion.

[0300] To satisfy Equation 1-1, the maximum angle (θ), the length of the supply section (γ), and / or the vertical length (A) of the lyocell material can be adjusted.

[0301] In an exemplary method for manufacturing a lyocell material, lamination of the lyocell material can be performed during the pendulum movement of the supply unit. By laminating the lyocell material during the pendulum movement, the vertical length (A) of the lyocell material can be adjusted and increased.

[0302] In an exemplary method for manufacturing lyocell material, the pendulum movement of the supply section may be performed at a constant speed. Alternatively, the pendulum movement of the supply section may be performed at a variable speed. By maintaining or controlling the speed of the pendulum movement, the weight of the lyocell material disposed at the edge and / or the weight of the lyocell material disposed at the center may be controlled.

[0303] In the exemplary method for manufacturing lyocell material, the maximum movement speed (V) of the pendulum movement max) for the minimum velocity of pendulum motion (V min ) can exceed 0.7. In addition, the maximum velocity of pendulum motion (V max ) for the minimum velocity of pendulum motion (V min ) may be less than or equal to 1.

[0304] The maximum velocity of pendulum motion (V max ) for the minimum velocity of pendulum motion (V min ) satisfies the above-described numerical range, the lamination of the lyocell material can be performed uniformly, and the post-processing property of the lyocell material can be improved. The maximum motion speed (V) of the pendulum motion max ) for the minimum velocity of pendulum motion (V min ) does not meet the lower limit, lyocell material may be mainly placed at the edge. As a result, the dissolution of lyocell material may be poor.

[0305]

[0306] [Smoking items]

[0307] 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.

[0308] 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).

[0309] 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.

[0310] 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.

[0311] The above tobacco medium comprises a tobacco substance, and the tobacco substance comprises nicotine. In addition, the tobacco medium may additionally comprise an excipient.

[0312] 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.

[0313] 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.

[0314] 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.

[0315]

[0316] [Filter for smoking items]

[0317] Lyocell material can be used in filters for smoking articles. The lyocell material may be lyocell tow. In one example, the lyocell tow includes crimped lyocell multifilament.

[0318] 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.

[0319] 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.

[0320] In one example, the single denier of the filaments forming the lyocell multifilament may be 1.5 to 8.0 denier. The specific values ​​are the same as those described above.

[0321] In one example, the crimped lyocell multifilament may be a lyocell material having a total fineness of 15,000 to 55,000 denier, and may preferably be lyocell tow. The specific values ​​are the same as those described above.

[0322] In one example, the crimped lyocell multifilament may have 10 to 50 crimps per inch. The specific figures are the same as those described above.

[0323] In one example, the above-described smoking article filter may further include a binder on the surface of the crimped lyocell multifilament or between the crimped lyocell multifilaments. The binder increases the hardness of the tow-made smoking article filter, thereby preventing problems such as filter jamming during the filter manufacturing process or cigarette manufacturing process. The description of the types, components, and contents of usable binders is the same as described above.

[0324] 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).

[0325] In a specific example of the present application, the filter for the smoking article may have a predetermined shape and size.

[0326] For example, the filter may have a rod shape. More specifically, the filter for the smoking article may have a cylindrical shape.

[0327] 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.

[0328] 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.

[0329] 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.

[0330] 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).

[0331] In one example, when a porous paper is used, the paper may have a porosity of 10 to 50,000 Coresta Units (CU). A Coresta Unit is the volumetric flow rate (cm2) of air passing through a 1 cm2 substrate sample (i.e., porous paper) at a pressure difference of 1 kPa. 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.

[0332] 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:

[0333] 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.

[0334] Descriptions of other filters for smoking articles and materials included therein are the same as those described above, so they are omitted.

[0335]

[0336] [Method for manufacturing filters for smoking articles]

[0337] 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.

[0338] 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.

[0339] 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.

[0340] 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.

[0341] Preferably, the lyocell material used in the manufacture of filters for smoking articles may be lyocell tow.

[0342] 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.

[0343]

[0344]

[0345] 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, by satisfying a predetermined plating index, the post-processing properties of the lyocell material, such as its desalination properties, can be improved. As a result, the process costs required for manufacturing the smoking article filter can be reduced.

[0346]

[0347] Figure 1 is a top view of an exemplary lyocell material.

[0348] Figure 2 is a conceptual diagram of a stacking device.

[0349]

[0350] 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.

[0351]

[0352] 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.

[0353]

[0354] [Manufacturing example]

[0355] 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 prepare a spinning dope for producing tow having a concentration of 11 wt%. Then, the spinning dope was spun while maintaining the spinning temperature at 110°C in the spinning nozzle and appropriately adjusting the discharge amount and spinning speed.

[0356] The spinning dope on the filament discharged from the spinning nozzle was supplied to the coagulation liquid (the coagulation liquid having a concentration of 75 wt% water and 25 wt% NMMO and a temperature of approximately 25°C) in the coagulation tank through the air gap section. At this time, the cooling air in the air gap section primarily coagulated the spinning dope at a temperature of 8°C and an air flow rate of 200 N㎥ / h. In addition, the concentration of the coagulation liquid was continuously monitored using a sensor and a refractometer.

[0357] Then, the coagulated lyocell filament was washed. Specifically, the filament was introduced into a traction roller, and the NMMO remaining in the filament was removed with a washing solution sprayed from a washing device. Then, the washed filament was immersed in a bath designed to a predetermined emulsion concentration.

[0358] The filament was processed at a pressure of 2 kgf / cm2 using a nip roll installed in the bath discharge section and fed into a crimp machine for crimping. Specifically, the pressure of the press roller was set to 2.5 kgf / cm2 and the pressure of the doctor blade was set to 0.5 kgf / cm2 to crimp the lyocell material.

[0359] Lyocell material was manufactured by laminating crimped lyocell material through a laminating device.

[0360]

[0361] The manufactured lyocell tow has a single fiber count of 2.22 to 8.89 dtex (2.0 to 8.0 denier), a total fiber count of 3,333 to 6,111 tex (30,000 to 55,000 denier), and a crimp count of 5.91 to 21.65 ea / cm (15 to 55 ea / inch).

[0362]

[0363] Example 1

[0364] Prepare a lyocell material according to Manufacturing Example 1, but the length (γ) of the supply section of the laminating device, the vertical length (A) of the laminated lyocell material, the maximum angle (θ) of the pendulum movement, and the maximum movement speed (V) of the pendulum movement max ) for the minimum velocity of pendulum motion (V min ) was as shown in Table 1 below.

[0365]

[0366] Examples 2 to 6

[0367] Prepare in the same way as Example 1, but with the length of the supply section (γ), the vertical length of the lyocell material (A), the maximum angle of pendulum movement (θ), and the maximum movement speed of the pendulum movement (V max ) for the minimum velocity of pendulum motion (V min ) was as shown in Table 1 below.

[0368]

[0369] Comparative Example 1

[0370] Prepare in the same way as Example 1, but with the length of the supply section (γ), the vertical length of the lyocell material (A), the maximum angle of pendulum movement (θ), and the maximum movement speed of the pendulum movement (V max ) for the minimum velocity of pendulum motion (V min ) of the ratio (V) min / V max ) was as shown in Table 1 below.

[0371]

[0372] Evaluation target length of the supply section (γ, m)Vertical length (A, m)Maximum angle of pendulum motion (θ, °)V min / V max (%)Example 1417.299.2Example 2319.698.6Example 341.510.898.2Example 421.522.092.7Example 51130.086.6Example 611.236.980.0Comparative Example 10.7145.670.0

[0373]

[0374] <Evaluation Example 1: Weight ratio and productivity evaluation>

[0375] For the lyocell materials of Examples 1 to 6 and Comparative Example 1, the plating index was calculated according to Equation 1 below. In Equation 1, C1 was the average weight of the central portion, and M1 was the average weight of the edge portion.

[0376] [Formula 1]

[0377]

[0378]

[0379] Meanwhile, a spreader was used to pull one end of each lyocell material. When pulling was continuous, the processability of the lyocell material and the productivity of the filter for smoking articles were evaluated as excellent. When the pulling step was delayed or interrupted, the processability and productivity were evaluated as inadequate. The evaluation results are shown in Table 2 below.

[0380]

[0381] Ratio of weight of evaluation target Evaluation result Example 1100 Excellent example 299 Excellent example 399 Excellent example 496 Excellent example 593 Excellent example 690 Excellent Comparative example 185 Defective

Claims

A lyocell material comprising crimped lyocell multifilaments, comprising a central portion and one or more edges, Lyocell material satisfying the following equation 1: [Formula 1] In equation 1, C1 is the total weight of the central part, M1 is the total weight of the above-mentioned side. In the first paragraph, The above lyocell material comprises one or more turning points, Based on the vertical length of the above lyocell material, the turning points are each located at either end of the vertical direction, The above edge is a part closer to either of the two ends, The central portion is a lyocell material that is closer to the exact center point of the two ends than either of the two ends. In the second paragraph, Lyocell material, wherein the number of the above-mentioned turning points is 3 to 30 ea. In the first paragraph, Lyocell material satisfying the following equation 1-1: [Formula 1-1] In equation 1-1, C1 is the total weight of the central part, M1 is the total weight of the above-mentioned side. In paragraph 4, Lyocell material, where Equation 1-1 is satisfied for all edges In the first paragraph, A lyocell material, wherein the total weight of the lyocell multifilaments arranged in the central portion is less than or equal to the total weight of the lyocell multifilaments arranged in the edge portion. In the first paragraph, Lyocell material, wherein the number of crimps is 10 ea / inch to 60 ea / inch. In the first paragraph, The single fiber of the above lyocell multifilament is 1.5 to 11.0 denier, lyocell material. In the first paragraph, The above lyocell multifilament yarn fineness is 10,000 to 40,000 denier, lyocell material. In the first paragraph, Lyocell material with a total fineness of 15,000 to 55,000 denier. In the first paragraph, The above lyocell multifilament comprises one or more monofilaments, Lyocell material, wherein at least one of the above monofilaments has a heterogeneous cross-section. In the first paragraph, Lyocell tow-in, lyocell material. In the first paragraph, Lyocell material for filters for smoking products. In the first paragraph, Lyocell material, not for use in tie-dye or clothing. A filter for a smoking article comprising a lyocell material according to any one of claims 1 to 14. A smoking article comprising a filter for a smoking article according to Article 15. A method for manufacturing a lyocell material, comprising: a lyocell dope spinning step; a coagulation and obtaining step of lyocell multifilament; a washing step; an emulsion treatment step; and a crimping step; Including further lamination steps of lyocell material, The above lamination step is performed by a lamination device, The above-mentioned stacking device includes a body part and a supply part capable of pendulum movement, A method for manufacturing a lyocell material, wherein lamination of the lyocell material is performed by supplying the lyocell material through a supply unit. In Article 17, A method for manufacturing a lyocell material, which is performed so as to satisfy the following equation 1: [Formula 1] In equation 1, C1 is the total weight of the central part, M1 is the total weight of the above-mentioned side. In Article 17, A method for manufacturing a lyocell material, wherein the maximum angle of the above pendulum movement is 45° or less. In Article 17, The maximum speed of the above pendulum motion (V max ) for the minimum velocity of the above pendulum motion (V min ) A method for manufacturing lyocell material, wherein the ratio of lyocell to lyocell exceeds 0.7.

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