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WO2025121911A1 - Matériau lyocell, filtre d'article à fumer, article à fumer et leurs procédés de fabrication - Google Patents

Matériau lyocell, filtre d'article à fumer, article à fumer et leurs procédés de fabrication Download PDF

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Publication number
WO2025121911A1
WO2025121911A1 PCT/KR2024/019853 KR2024019853W WO2025121911A1 WO 2025121911 A1 WO2025121911 A1 WO 2025121911A1 KR 2024019853 W KR2024019853 W KR 2024019853W WO 2025121911 A1 WO2025121911 A1 WO 2025121911A1
Authority
WO
WIPO (PCT)
Prior art keywords
denier
lyocell
dtex
less
multifilament
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/KR2024/019853
Other languages
English (en)
Korean (ko)
Inventor
진상우
정종철
박은영
이정훈
서승동
황영남
양진철
마경배
안기진
이존태
황민희
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kolon Industries Inc
KT&G Corp
Original Assignee
Kolon Industries Inc
KT&G Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kolon Industries Inc, KT&G Corp filed Critical Kolon Industries Inc
Publication of WO2025121911A1 publication Critical patent/WO2025121911A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/013—Regenerated cellulose series
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/062—Use of materials for tobacco smoke filters characterised by structural features
    • A24D3/063—Use of materials for tobacco smoke filters characterised by structural features of the fibers
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/062—Use of materials for tobacco smoke filters characterised by structural features
    • A24D3/063—Use of materials for tobacco smoke filters characterised by structural features of the fibers
    • A24D3/064—Use of materials for tobacco smoke filters characterised by structural features of the fibers having non-circular cross-section
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/067—Use of materials for tobacco smoke filters characterised by functional properties
    • A24D3/068—Biodegradable or disintegrable
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
    • A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • D01D4/02—Spinnerettes
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/02—Starting the formation
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/22—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/26—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre with characteristics dependent on the amount or direction of twist
    • D02G3/28—Doubled, plied, or cabled threads
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
    • D10B2201/20—Cellulose-derived artificial fibres
    • D10B2201/22—Cellulose-derived artificial fibres made from cellulose solutions
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2505/00—Industrial
    • D10B2505/04—Filters

Definitions

  • the present application relates to lyocell materials, filters containing the same, smoking articles, and methods for manufacturing the same.
  • cellulose acetate fibers have been mainly used as cigarette filter materials.
  • Cellulose acetate is known to be a biodegradable material, but cellulose acetate-based smoking filter materials maintain their original form for 1 to 2 years after being buried in the soil, and it takes a considerable amount of time until they are completely biodegraded.
  • One purpose of the present application is to provide a lyocell material that can replace commercialized cellulose acetate for filters for smoking articles.
  • 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 discarded.
  • Another object of the present application is to provide a lyocell filter for smoking articles.
  • Another object of the present application is to provide a smoking article (e.g., a cigarette) comprising a lyocell filter.
  • lyocell material a filter including the same, a smoking article, and the like can be provided.
  • a first lyocell multifilament comprises a first monofilament having a first single fineness
  • the second lyocell multifilament comprises a second monofilament having a second single fineness
  • the first single fineness and the second single fineness may be provided from different lyocell materials, and/or the first single fineness and the second single fineness may be different.
  • a filter for a smoking article comprising a first Lyocell multifilament; and a second Lyocell multifilament, wherein the first Lyocell multifilament comprises a first monofilament having a first single fineness, and the second Lyocell multifilament comprises a second monofilament having a second single fineness, wherein the first single fineness and the second single fineness are different Lyocell materials, and/or the first single fineness and the second single fineness may be different.
  • a smoking article comprising the lyocell material or filter may be provided.
  • a method for producing the above lyocell material can be provided.
  • 'smoking article' may mean an article capable of generating an aerosol, such as a cigarette (cigarette), a cigar, etc.
  • the smoking article may include an aerosol generating material or an aerosol forming substrate.
  • the smoking article may include a solid material based on a tobacco raw material, such as a leaf tobacco, a tobacco ash, or a reconstituted tobacco.
  • the smoking material may include a volatile compound.
  • the temperature at which the characteristics are confirmed or measured may be room temperature.
  • the room temperature is 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.
  • the term “different” can mean qualitatively different from each other.
  • “A and B are different” can mean that the amount of A and the amount of B are the same, but A and B are qualitatively different, or A and B are quantitatively different and also qualitatively different.
  • the term “qualitative” can mean a non-quantitative characteristic. For example, differences in color, shape, texture, structure, and composition can fall into the category of "qualitative" differences.
  • the term “crimp” may refer to a configuration of waves, curls or undulations inherent in a material, such as a fiber, a (mono)filament, a multifilament and/or a yarn, or imparted thereto either by nature or by mechanical, thermal and/or chemical processes.
  • the crimp may be characterized by a periodic deviation from a straight axis along the length of the material, fiber, filament, multifilament and/or yarn.
  • One crimp in a material, fiber, filament, multifilament and/or yarn may be defined as one repeating unit of said periodic deviation.
  • the presence of crimp influences properties of the material and of fabrics made from the material, such as elasticity, bulk, resilience and texture.
  • the term “degree of polymerization” may refer to the number of monomer units and/or repeating units in a macromolecule or polymer or oligomer molecule.
  • the degree of polymerization may be expressed as Mn/M0, where Mn is the number average molecular weight of the macromolecule or polymer or oligomer molecule and M0 is the molecular weight of the monomer or repeating unit.
  • 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.
  • a first lyocell multifilament; and a second lyocell multifilament wherein the first lyocell multifilament comprises a first monofilament having a first single fineness, and the second lyocell multifilament comprises a second monofilament having a second single fineness, wherein the first single fineness and the second single fineness are different lyocell materials provided, and/or the first single fineness and the second single fineness may be different.
  • first single fineness may also be referred to as “fineness per first monofilament” and/or “first monofilament fineness.”
  • second single fineness may also be referred to as “fineness per second monofilament” and/or “second monofilament fineness.”
  • one or more of the first lyocell multifilament and the second lyocell multifilament may be crimped.
  • the first lyocell multifilament and the second lyocell multifilament may each be crimped.
  • the first Lyocell multifilament and the second Lyocell multifilament can independently have crimps of from 3.94 to 19.69 per centimeter (10 to 50 per inch).
  • the cross-section of the first monofilament and the cross-section of the second monofilament can be, independently of one another, heterogeneous cross-sections.
  • the first monofilament comprises at least one cross-section and/or the second monofilament comprises at least one cross-section.
  • the heteromorphic cross-section may include more than three protrusions, and preferably may include three protrusions.
  • protrusion may mean a distinct, extended segment or arm extending outwardly from a central core or bonding point of the monofilament cross-section.
  • a heteromorphic cross-section including three protrusions may be referred to as a “Y-shaped cross-section.”
  • one or more cross sections of the first monofilament and one or more cross sections of the second monofilament may be in a similarity relationship to one another.
  • the cross sections of the first monofilament and the cross sections of the second monofilament may be in a similarity relationship to one another.
  • the term “similarity relationship” may mean that (one or more) cross sections of the first monofilament and (one or more) cross sections of the second monofilament are substantially similar and/or have substantially the same shape.
  • the space occupancy of the first monofilament and the second monofilament can be, independently of one another, from 120% to 600%.
  • the first single-stranded fiber may be greater than or equal to the second single-stranded fiber.
  • the first single-stranded fiber may be greater than the second single-stranded fiber.
  • the first single-filament yarn may have a count of 2.22 to 8.89 dtex (2.0 to 8.0 denier).
  • the second single-strand filament may have a denier of 1.67 to 6.67 dtex (1.5 to 6.0 denier).
  • the difference between the first and second single denier can be from 0.22 to 7.22 dtex (0.2 to 6.5 denier). Additionally, the difference between the first and second single denier can be from 0.44 to 1.11 dtex (0.4 to 1.0 denier).
  • the first Lyocell multifilament and the second Lyocell multifilament may be co-spinning.
  • the lyocell material can have a total fineness of 1,667 to 6,111 tex (15,000 to 55,000 denier).
  • the first Lyocell multifilament may be included in an amount of 1 to 99 parts by weight, relative to a total of 100 parts by weight of the first Lyocell multifilament and the second Lyocell multifilament.
  • the second Lyocell multifilament may be included in an amount of 1 to 99 parts by weight for a total of 100 parts by weight of the first Lyocell multifilament and the second Lyocell multifilament.
  • the second lyocell multifilament may be included in an amount of from 1 part by weight to 10,000 parts by weight.
  • the lyocell material may be lyocell tow.
  • the lyocell material may be used for a smoking article filter.
  • a filter for a smoking article comprising any one of the exemplary lyocell materials.
  • a smoking article comprising any one of the exemplary lyocell materials.
  • a smoking article comprising any one of the exemplary smoking article filters.
  • a method for producing a lyocell material comprising: a lyocell dope spinning step; and a coagulation and multifilament obtaining step.
  • the method for making a lyocell material comprises a lyocell dope spinning step comprising spinning a first lyocell multifilament comprising a first monofilament and a second lyocell multifilament comprising a second monofilament, wherein the first single fineness of the first monofilament and the second single fineness of the second monofilament are different.
  • the first lyocell multifilament and the second lyocell multifilament may be spun using the same lyocell dope, or may be spun using different lyocell dopes.
  • the steps of spinning the first Lyocell multifilament and the steps of spinning the second Lyocell multifilament may be performed sequentially or simultaneously.
  • the step of spinning the first Lyocell multifilament and the step of spinning the second Lyocell multifilament may be performed through the same spinneret or through different spinnerets.
  • the steps of spinning the first Lyocell multifilament and the steps of spinning the second Lyocell multifilament can be performed simultaneously through the same spinneret.
  • the step of spinning the first Lyocell multifilament and the step of spinning the second Lyocell multifilament are performed through the same spinneret, but the cross-sectional area of the outlet (which may be referred to as a first outlet) through which the first Lyocell multifilament is spun out and the cross-sectional area of the outlet (which may be referred to as a second outlet) through which the second Lyocell multifilament is spun out may be different.
  • the step of spinning the first Lyocell multifilament and the step of spinning the second Lyocell multifilament are performed sequentially, wherein the first Lyocell multifilament and the second Lyocell multifilament can be coagulated and obtained in the same coagulation tank.
  • a lyocell material includes a first lyocell multifilament including a first monofilament and a second lyocell multifilament including a second monofilament, wherein a first single fineness of the first monofilament is different from a second single fineness of the second monofilament. Accordingly, the lyocell material according to an exemplary embodiment includes at least two kinds of monofilaments having different cross-sectional areas.
  • the lyocell material according to the exemplary embodiment can evenly enjoy the properties of the first monofilament having the first single fineness and the properties of the second monofilament having the second single fineness.
  • the physical properties of the lyocell material including the first multifilament and the second multifilament can be more finely adjusted.
  • the range of implementable filter weights and the range of implementable suction resistance can be greater than those of a lyocell material comprising only one type of monofilament.
  • the first single fiber density may be greater than the second single fiber density. Since the first single fiber density has a value greater than the second single fiber density, the second monofilament may be positioned in the empty space between the first monofilaments, and the surface area per unit weight of the lyocell material including the first lyocell multifilament and the second lyocell multifilament may further increase.
  • the lyocell material according to the exemplary embodiment can be used both for the manufacture of filters for smoking articles having a lower weight than conventional lyocell materials and for the manufacture of filters for smoking articles having a higher weight.
  • the lyocell material according to the exemplary embodiment can be used to implement lower suction resistance and higher suction resistance than conventional lyocell materials.
  • the lyocell material according to the exemplary embodiment can provide consumers and manufacturers of smoking articles with a wider range of choices in terms of diversification and optimization of filters for smoking articles.
  • Both the first monofilament and the second monofilament included in the lyocell material of the present application may have an irregular cross-section.
  • “Irregular” means that the shape of the outer line of the cross-section is not circular, and the "cross-section” may be a cross-section obtained by cutting the lyocell monofilament virtually or actually perpendicular to the longitudinal direction of the filament.
  • the outline of the heteromorphic cross-section may be tangent to an imaginary first circle (a circumscribed circle) and an imaginary second circle (an inscribed circle), respectively.
  • the imaginary second circle may be depicted inside the imaginary first circle, and/or the imaginary second circle may be located inside the imaginary first circle.
  • the "imaginary first circle” may also be referred to as a "imaginary circumscribed circle” and/or a “circumscribed circle”
  • the "imaginary second circle” may also be referred to as a "imaginary inscribed circle” and/or a "inscribed circle”.
  • the heterogeneous cross-section may be a shape including a plurality of protrusions, for example, a Y-shaped cross-section including three protrusions. It can be understood that the plurality of protrusions are formed integrally with the virtual second circle as the center and that their ends are in contact with the virtual first circle.
  • the heteromorphism of a monofilament can be defined by the following mathematical expression 1.
  • r1 is the radius of the virtual first circle
  • r2 is the radius of the virtual second circle
  • the radius of the virtual first circle can be 4 to 40 ⁇ m
  • the radius of the virtual second circle can be 2 to 14 ⁇ m
  • the degree of irregularity can be 1.01 to 10.
  • space occupancy of the monofilament can be defined by mathematical expression 2.
  • S1 is the area of the imaginary first circle
  • S2 is the cross-sectional area of the monofilament contained in the lyocell fiber.
  • the space occupancy of a monofilament having a heterogeneous cross-section can be 120 to 600%.
  • the cross-section of the first monofilament and the cross-section of the second monofilament may, independently of each other, be heterogeneous cross-sections.
  • the cross-section of the first monofilament and the cross-section of the second monofilament may, independently of each other, include three or more protrusions.
  • the cross-section of the first monofilament and the cross-section of the second monofilament may both include three protrusions.
  • the cross-section of at least one of the first monofilaments and the cross-section of at least one of the second monofilaments may be similar to each other, and/or the cross-section of the first monofilament and the cross-section of the second monofilament may be similar to each other.
  • the space occupancy ratios of the first monofilament and the second monofilament can be independently from each other 120% to 600%, or 150% to 550%, or 180% to 500%, or 200% to 450%, or 250% to 400%, or 300% to 350%.
  • the lyocell material of the present application comprises a first lyocell multifilament; and a second lyocell multifilament, wherein the first lyocell multifilament comprises a first monofilament having a first single fineness, and the second lyocell multifilament comprises a second monofilament having a second single fineness, wherein the first single fineness and the second single fineness are different.
  • the first single fineness and the second single fineness each mean the fineness of one monofilament separated from the first lyocell multifilament or the second lyocell multifilament.
  • the properties determined by the first monofilament density e.g., mechanical properties of the first monofilament
  • the properties determined by the second monofilament density e.g., mechanical properties of the second monofilament
  • the first single fineness can be from 2.22 to 8.89 dtex (2.0 to 8.0 denier).
  • the upper limit of the first single fineness can be 8.89 dtex (8.0 denier) or less, 7.78 dtex (7.0 denier) or less, 7.22 dtex (6.5 denier) or less, 6.67 dtex (6.0 denier) or less, 6.11 dtex (5.5 denier) or less, 5.56 dtex (5.0 denier) or less, 5.00 dtex (4.5 denier) or less, 3.89 dtex (3.5 denier) or less, 3.33 dtex (3.0 denier) or less, or 2.78 dtex (2.5 denier) or less.
  • the lower limit of the first single-filament yarn may be 2.22 dtex (2.0 denier) or more, 2.78 dtex (2.5 denier) or more, 3.33 dtex (3.0 denier) or more, 3.89 dtex (3.5 denier) or more, 4.44 dtex (4.0 denier) or more, 5.00 dtex (4.5 denier) or more, 5.56 dtex (5.0 denier) or more, 6.11 dtex (5.5 denier) or more, 6.67 dtex (6.0 denier) or more, 7.22 dtex (6.5 denier) or more, 7.78 dtex (7.0 denier) or more, or 8.33 dtex (7.5 denier) or more.
  • the properties e.g., relatively improved tensile strength
  • the first single fiber count is 2.22 to 8.89 dtex (2.0 denier to 8.0 denier), 2.78 to 8.89 dtex (2.5 denier to 8.0 denier), 3.33 to 8.89 dtex (3.0 denier to 8.0 denier), 3.89 to 8.89 dtex (3.5 denier to 8.0 denier), 4.44 to 8.89 dtex (4.0 denier to 8.0 denier), 5.00 to 8.89 dtex (4.5 denier to 8.0 denier), 5.56 to 8.89 dtex (5.0 denier to 8.0 denier), 6.11 to 8.89 dtex (5.5 denier to 8.0 denier), 6.67 to 8.89 dtex (6.0 denier to 8.0 denier), 7.22 to 8.89 dtex (6.5 denier to 8.0 denier), 7.78 to 8.89 dtex (7.0 denier to 8.0 denier), 8.33 to 8.89 dtex (7.5 denier to 8.0 denier), 2.22 to 8.33 dtex (2.0 denier to 7.5 denier), 2.78 to 8.33 dtex (2.0 denier to
  • the second single fineness can be from 1.67 to 6.67 dtex (1.5 to 6.0 denier).
  • the upper limit of the second single fineness can be no greater than 6.67 dtex (6.0 denier), no greater than 6.11 dtex (5.5 denier), no greater than 5.56 dtex (5.0 denier), no greater than 5.00 dtex (4.5 denier), no greater than 3.89 dtex (3.5 denier), no greater than 3.33 dtex (3.0 denier), or no greater than 2.78 dtex (2.5 denier).
  • the lower limit of the second single-strand fineness can be 1.67 dtex (1.5 denier) or more, 2.22 dtex (2.0 denier) or more, 2.78 dtex (2.5 denier) or more, 3.33 dtex (3.0 denier) or more, 3.89 dtex (3.5 denier) or more, 4.44 dtex (4.0 denier) or more, 5.00 dtex (4.5 denier) or more, 5.56 dtex (5.0 denier) or more, 6.11 dtex (5.5 denier) or more, 6.67 dtex (6.0 denier) or more, 7.22 dtex (6.5 denier) or more, 7.78 dtex (7.0 denier) or more, or 8.33 dtex (7.5 denier) or more.
  • the properties e.g., relatively improved specific surface area
  • the second single fiber count is 1.67 to 6.67 dtex (1.5 denier to 6.0 denier), 2.22 to 6.67 dtex (2.0 denier to 6.0 denier), 2.78 to 6.67 dtex (2.5 denier to 6.0 denier), 3.33 to 6.67 dtex (3.0 denier to 6.0 denier), 3.89 to 6.67 dtex (3.5 denier to 6.0 denier), 4.44 to 6.67 dtex (4.0 denier to 6.0 denier), 5.00 to 6.67 dtex (4.5 denier to 6.0 denier), 5.56 to 6.67 dtex (5.0 denier to 6.0 denier), 6.11 to 6.67 dtex (5.5 denier to 6.0 denier), 1.67 to 6.11 dtex (1.5 denier to 5.5 denier), 2.22 to 6.11 dtex (2.0 denier to 5.5 denier), 2.78 to 6.11 dtex (2.5 denier to 5.5 denier), 3.33 to 6.11 dtex (3.0 denier to 5.5 denier), 3.89 to 6.
  • the difference between the first and second single denier counts can be from 0.22 to 7.22 dtex (0.2 to 6.5 denier).
  • the difference between the first single fiber density and the second single fiber density is 0.56 to 7.22 dtex (0.5 to 6.5 denier), 1.11 to 7.22 dtex (1.0 denier to 6.5 denier), 1.67 to 7.22 dtex (1.5 denier to 6.5 denier), 2.22 to 7.22 dtex (2.0 denier to 6.5 denier), 2.78 to 7.22 dtex (2.5 denier to 6.5 denier), 3.33 to 7.22 dtex (3.0 denier to 6.5 denier), 3.89 to 7.22 dtex (3.5 denier to 6.5 denier), 4.44 to 7.22 dtex (4.0 denier to 6.5 denier), 5.00 to 7.22 dtex (4.5 denier to 6.5 denier), 5.56 to 7.22 dtex (5.0 denier to 6.5 denier), 6.11 to 7.22 dtex (5.5 denier to 6.5 denier),
  • the difference between the properties of the first monofilament and the properties of the second monofilament can be highlighted, and an additional effect (e.g., an increase in surface area per unit weight) due to the mixing of the first monofilament and the second monofilament can be provided.
  • the total fineness of the lyocell material can be 1,667 to 6,111 tex (15,000 to 55,000 denier), and the total fineness of the lyocell material can be calculated as the sum of the total fineness of the first lyocell multifilament and the total fineness of the second lyocell multifilament.
  • the lower limit of the total fineness is, for example, 1,778 tex (16,000 denier) or more, 1,833 tex (16,500 denier) or more, 1,889 tex (17,000 denier) or more, 1,944 tex (17,500 denier) or more, 2,000 tex (18,000 denier) or more, 2,056 tex (18,500 denier) or more, 2,111 tex (19,000 denier) or more, 2,167 tex (19,500 denier) or more, 2,222 tex (20,000 denier) or more, 2,278 tex (20,500 denier) or more, 2,333 tex (21,000 denier) or more, 2,389 tex(21,500 denier) 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
  • 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)
  • the process for manufacturing a filter for smoking articles may not be good (continuous process is impossible due to cutting), and if the amount of tow filled in the filter paper during the manufacturing of the filter for smoking articles is too little or too much, it may be difficult to secure sufficient filter properties (e.g., hardness or suction resistance, etc.).
  • the method for measuring the fineness is not particularly limited, but, for example, a 2 m sample of the lyocell material to be measured, for example, lyocell tow, is collected and stabilized in a room maintained at a temperature of 20°C and a humidity of 65% for 24 hours. One end of the stabilized lyocell tow is fixed, and a weight with a load of 2 kg is attached to the other end. The tow in a state of being extended by the load is maintained (stabilized) for 5 seconds, and then cut to 90 cm to obtain a sample, and the weight of the sample is measured (total fineness). The fineness is converted into the measured weight ⁇ 10000 according to the denier conversion method. When the total fineness of the sample is divided by the number of monofilaments in the sample, the single fineness of the monofilaments in the sample is calculated.
  • the total fineness of the lyocell material can be determined by the single fineness and crimp count of the monofilament.
  • each single fineness and crimp count can be controlled, and the total fineness of the lyocell material (e.g., lyocell tow) suitable for manufacturing a filter for a smoking article and securing its function can be secured.
  • the first Lyocell multifilament and the second Lyocell multifilament can independently have crimps of from 3.94 to 19.69 per centimeter (10 to 50 per inch).
  • the number of crimps may be 5.91 ea/cm(15 ea/inch) or more, 7.87 ea/cm(20 ea/inch) or more, 9.84 ea/cm(25 ea/inch) or more, 11.81 ea/cm(30 ea/inch) or more, 13.78 ea/cm(35 ea/inch) or more, 15.75 ea/cm(40 ea/inch) or more, or 17.72 ea/cm(45 ea/inch) or more, and the upper limit may be, for example, 17.72 ea/cm(45 ea/inch) or less, 15.75 ea/cm(40 ea/inch) or less, 13.78 ea/cm(35 ea/).
  • the number of crimps can be measured using, for example, a single-fiber property evaluation device (for example, Favimat). Specifically, a manufactured lyocell material (preferably, lyocell tow) sample can be left and stabilized for 24 hours under the conditions of a temperature of 20 ⁇ 2°C and a humidity of 65 ⁇ 4%. A sample can be collected from the stabilized sample so that the crimp is not damaged. The collected sample can be mounted on a dedicated jig with a length (gauge length) of 10 to 30 mm. The initial load during measurement can be 0.45 g/tex (0.05 g/denier), and the crimp sensitivity can be 0.01 mm. The number of crimps can be measured under the conditions described above (i.e., a temperature of 20 ⁇ 2°C and a humidity of 65 ⁇ 4%).
  • lyocell materials manufactured to meet the single fiber count, total fiber count, and/or crimp count specifications described above may be used in smoking articles.
  • the above lyocell material can include first lyocell multifilaments; second lyocell multifilaments; and an emulsion coated on at least one of the first lyocell multifilaments and the second lyocell multifilaments.
  • the emulsion is coated on the first lyocell multifilaments and the second lyocell multifilaments.
  • the emulsion includes (a) an esterified product of a fatty acid having 16 or more carbon atoms and an aliphatic monohydric alcohol; and (b) an esterified product of sorbitan and a fatty acid having 16 or more carbon atoms.
  • the emulsion can be applied to some or all of the mono- or multifilaments forming the lyocell material. In addition, the emulsion can penetrate between the filaments.
  • the emulsion comprising at least the above components (a) and (b) may have hydrophobicity.
  • the lyocell material treated with the emulsion has excellent spreading properties.
  • the lyocell material may contain a predetermined amount of the emulsion.
  • the content of the emulsion may refer to OPU (wt%) described below.
  • OPU may refer to "oil pick up ratio.”
  • 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.
  • 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.
  • the upper limit can 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.
  • an extrusion method can be used as a method for measuring the content (OPU) of the above-mentioned emulsion.
  • a sample e.g., 2 to 5 g, specifically, about 2.5 g
  • the sample weight is put into a syringe-shaped container.
  • the material of the container is not particularly limited, but may be SUS (stainless steel).
  • a solvent e.g., methanol
  • the amount of the injected solvent may be 10 ml or less (e.g., about 8 ml)).
  • the solvent When the solvent is injected into the sample, a dropping method can be used, and the dropping speed is uniformly controlled. Then, the solvent injected into the container as described above is allowed to drop 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 solvent injection and solvent dropping described above are performed three times, and the sample is pressed once using a syringe-shaped container to apply pressure (e.g., 98 N/cm 2 (10 kgf/cm 2 ) or less, 49 N/cm 2 (5 kgf/cm 2 ) or less, or 20-39 N/cm 2 (2-4 kgf/cm 2 )).
  • pressure e.g., 98 N/cm 2 (10 kgf/cm 2 ) or less, 49 N/cm 2 (5 kgf/cm 2 ) or less, or 20-39 N/cm 2 (2-4 kgf/cm 2 )
  • This sufficiently extrudes the solvent and emulsion present in the sample.
  • the sample is squeezed by applying pressure until the solvent stops coming out. Thereafter, the plate is stored in a desiccator for 5 to 10 minutes, and the weight of the plate containing the sample is measured (plate weight B). Then, calculate the content of the milk according to the formula below.
  • the lyocell material that serves as the reference for the emulsion content may be a first lyocell multifilament treated with an emulsion and a second lyocell multifilament treated with an emulsion.
  • the lyocell material may be a first lyocell multifilament and/or a second lyocell multifilament to which a first emulsion treatment (which will be described below) has been applied, a first lyocell multifilament and/or a second lyocell multifilament to which a first emulsion treatment and a second emulsion treatment (which will be described below) have been applied.
  • the first lyocell multifilament and/or the second lyocell multifilament to which an emulsion treatment has been applied may each have a crimp applied.
  • the component (a) is a compound that can function as a kind of lubricant or oil, and can be a component that is harmless to the human body enough to be used in food.
  • the component (a) provides lubricity to the fibers fed into the crimper. If the lubricity is insufficient, the lyocell clumps and cannot escape the crimper, and if the lubricity is too high, there is a problem that the crimp is not formed well.
  • the content of the component (a) can be controlled as described below, taking these functions into consideration.
  • the type of fatty acid having 16 or more carbon atoms forming the ester compound is not particularly limited.
  • a fatty acid having 16 or more carbon atoms that can provide an ester compound that is harmless to the human body enough to be used in foods can be used.
  • fatty acids having 16 or more carbon atoms may be saturated fatty acids and/or unsaturated fatty acids.
  • saturated fatty acids examples include palmitic acid (hexadecanoic acid, CH 3 (CH 2 ) 14 COOH), margaric acid (heptadecanoic acid, CH 3 (CH 2 ) 15 COOH), stearic acid (octadecanoic acid, CH 3 (CH 2 ) 16 COOH), nonadecylic acid (nonadecanoic acid, CH 3 (CH 2 ) 17 COOH), or arachidic acid (eicosanoic acid, CH 3 (CH 2 ) 18 COOH).
  • the types of saturated fatty acids that can be used are not limited to these.
  • the types of usable saturated fatty acids are not limited to these.
  • the fatty acid is selected from the group consisting of palmitic acid, margaric acid, stearic acid, nonadecylic acid, arachidic acid, palmitoleic acid, oleic acid, linoleic acid and arachidonic acid.
  • 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.
  • the type of aliphatic monohydric alcohol forming it is also not particularly limited.
  • An aliphatic monohydric alcohol that can provide an ester compound that is harmless to the human body enough to be used in food can be used.
  • it can be a saturated fatty alcohol or an unsaturated fatty alcohol, and they can have a linear or branched form.
  • 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.
  • the aliphatic monohydric alcohols include, but are not limited to, methanol, ethanol, butanol, lauryl alcohol, isotridecanol, and stearyl alcohol.
  • the aliphatic monohydric alcohol is selected from the group consisting of methanol, ethanol, butanol, lauryl alcohol, isotridecanol, and stearyl alcohol.
  • the component (a) may be an ester of isotridecanol and stearic acid (e.g., isotridecyl stearate).
  • stearic acid e.g., isotridecyl stearate
  • the type of component (a) that can be used is not limited thereto.
  • the content of the above-mentioned (a) component included in the milk may be adjusted in consideration of the function of the milk or the function of the (a) component.
  • the above (b) component i.e., sorbitan and an ester of a fatty acid having 16 or more carbon atoms, is a compound that can function as a type of emulsifier and may be a component harmless to the human body enough to be used in foods.
  • this (b) component has both hydrophilicity and hydrophobicity due to the polyhydric alcohol (i.e., sorbitan), it enables the (a) component, which provides lubrication to the fiber, to be well dispersed in water as described below.
  • the (a) and (b) components 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 (b) component can be controlled as described below in consideration of these functions.
  • the type of fatty acid having 16 or more carbon atoms forming it is not particularly limited.
  • a fatty acid having 16 or more carbon atoms that can provide an ester compound that is harmless to the human body enough to be used in food can be used.
  • fatty acids having 16 or more carbon atoms may be saturated fatty acids and/or unsaturated fatty acids.
  • saturated fatty acids examples include palmitic acid (hexadecanoic acid, CH 3 (CH 2 ) 14 COOH), margaric acid (heptadecanoic acid, CH 3 (CH 2 ) 15 COOH), stearic acid (octadecanoic acid, CH 3 (CH 2 ) 16 COOH), nonadecylic acid (nonadecanoic acid, CH 3 (CH 2 ) 17 COOH), or arachidic acid (eicosanoic acid, CH 3 (CH 2 ) 18 COOH).
  • the types of saturated fatty acids that can be used are not limited to these.
  • the types of usable saturated fatty acids are not limited to these.
  • the fatty acid is selected from the group consisting of palmitic acid, margaric acid, stearic acid, nonadecylic acid, arachidic acid, palmitoleic acid, oleic acid, linoleic acid and arachidonic acid.
  • 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.
  • an ester of sorbitan and oleic acid e.g., sorbitan monooleate
  • the type of the usable (b) component is not limited thereto.
  • 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.
  • the emulsion may include 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 (a) a fatty acid having 16 or more carbon atoms and an aliphatic monohydric alcohol.
  • 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).
  • 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.
  • the surface of the emulsion-treated lyocell multifilament or lyocell tow may have hydrophobicity.
  • the emulsion may include, based on 100 wt% of the total weight of the emulsion, 40 to 80 wt% of (a) an esterified product of a fatty acid having 16 or more carbon atoms and an aliphatic monohydric alcohol.
  • the content of the (a) component may be 45 wt% or more, 50 wt% or more, 55 wt% or more, 60 wt% or more, or 65 wt% or more, 70 wt% or more, or 75 wt% or more.
  • 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.
  • the emulsion may comprise an excess amount of component (a).
  • the emulsion may include 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.
  • 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.
  • 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.
  • the emulsion may further contain water.
  • a small amount of water may aid in emulsification.
  • the content of water is not particularly limited, but may be included as the remainder excluding the sum of the contents of component (a) and component (b) among 100 wt% of the entire emulsion.
  • the content of water included in the emulsion i.e., the remainder excluding the sum of the contents of the remaining components excluding water
  • the content of water included in the emulsion 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.
  • 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.
  • the first lyocell multifilament is a crimped first lyocell multifilament and/or a crimped and emulsified first lyocell multifilament.
  • the second lyocell multifilament is a crimped second lyocell multifilament and/or a crimped and emulsified second lyocell multifilament.
  • the present application relates to a method for producing a lyocell material. Through the method, a lyocell material can be produced and used in a smoking article.
  • 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.
  • the method for manufacturing the lyocell material may further include conventional steps other than the steps described above.
  • the milk treatment step may be performed before the crimping step, after the crimping step, or before and after the crimping step.
  • the emulsion treatment can be performed independently, for example, by spraying the emulsion of the composition described above onto the lyocell multifilaments or immersing the lyocell multifilaments 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.
  • the above crimping step may be performed, for example, by applying steam and/or pressure to the lyocell multifilament.
  • a method for producing 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 can be performed by including one or more of the steps described below.
  • This step is a step of spinning lyocell dope (or spinning dope) containing lyocell cellulose (or cellulose pulp) and N-methylmorpholine-N-oxide (NMMO).
  • lyocell cellulose or cellulose pulp
  • NMMO N-methylmorpholine-N-oxide
  • the lyocell dope spinning step includes a step of spinning a first lyocell multifilament and a step of spinning a second lyocell multifilament. Matters relating to the first monofilament of the first lyocell multifilament and the second monofilament of the second lyocell multifilament are as described above.
  • the step of spinning the first lyocell multifilament and the step of spinning the second lyocell multifilament may be performed sequentially or simultaneously.
  • lyocell materials do not generate any pollutants during the production process, as the amine oxide solvent used in the production of lyocell fibers is recyclable and biodegradable when disposed of. Furthermore, lyocell tow is biodegradable and removed within a relatively short period of time, making lyocell a more environmentally friendly material than cellulose acetate.
  • the first lyocell multifilament and the second lyocell multifilament can be spun using the same lyocell dope.
  • the chemical properties of the first lyocell multifilament and the second lyocell multifilament can be identical or extremely identical.
  • first lyocell multifilament and the second lyocell multifilament can be spun using different lyocell dopes.
  • the physical properties of the first lyocell multifilament and the second lyocell multifilament can be changed, and the physical properties of the lyocell material can be finely adjusted.
  • 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 the lyocell fiber, and if the content exceeds the above range, it is difficult to dissolve in the solvent.
  • the content of cellulose in the spinning dope may be 6 wt% or more, 7 wt% or more, 8 wt% or more, 9 wt% or more, or 10 wt% or more, and the upper limit thereof may be, for example, 14 wt% or less, 13 wt% or less, 12 wt% or less, 11 wt% or less, 10 wt% or less, or 9 wt% or less.
  • the term "cellulose” may refer to "lyocell cellulose".
  • the radiation dope may include an N-methylmorpholine-N-oxide (NMMO) aqueous solution.
  • NMMO N-methylmorpholine-N-oxide
  • the aqueous solution may include, for example, 80 to 95 weight ratios of N-methylmorpholine-N-oxide and 5 to 20 weight ratios of water, taking into account the degree of dissolution of cellulose and the process temperature.
  • the cellulose or cellulose pulp may have an alpha-cellulose content of 85 to 97 wt% relative to 100 wt% of total cellulose and/or cellulose pulp.
  • the cellulose or cellulose pulp may have a hemicellulose content of 3 wt% to 15 wt% relative to 100 wt% of the total cellulose and/or cellulose pulp.
  • stable physical properties e.g., implementation of hardness or suction resistance
  • processability of the lyocell material can be more easily secured.
  • the degree of polymerization (DPw) of the cellulose may be from 600 to 1700. In some embodiments, the degree of polymerization refers to the number of repeating units and/or monomers of the cellulose and/or hemicellulose within the cellulose pulp.
  • the shape of the detention for discharging the radiation dope is not particularly limited.
  • a donut-shaped radiation detention can be used.
  • the step of spinning the first lyocell multifilament and the step of spinning the second lyocell multifilament may be performed through the same spinneret or through different spinnerets.
  • the step of spinning the first Lyocell multifilament and the step of spinning the second Lyocell multifilament are performed simultaneously through the same spinning device, the step of spinning the first Lyocell multifilament and the step of spinning the second Lyocell multifilament can be performed simultaneously.
  • the conditions for coagulating and obtaining the first Lyocell multifilament and the second Lyocell multifilament can be applied identically, and the change in the Lyocell multifilament according to the coagulation and obtaining steps can be controlled at the same level.
  • the nozzle temperature of the radiation detention can be appropriately selected by those skilled in the art. Considering that the viscosity of the radiation dope may vary depending on the radiation temperature and thus the ejection may not be performed well, the radiation temperature can be, for example, at a temperature of 100° C. to 120° C. or less or 100° C. to 110° C. or less.
  • the step of spinning the above-described spinning dope may be performed under controlled spinning conditions so that the first single fineness and the second single fineness are each adjusted.
  • one or more spinning conditions among the discharge amount and the spinning speed of the above-described spinning dope may be appropriately controlled so that the first single fineness of the filaments included in the lyocell material satisfies 2.22 to 8.89 dtex (2.0 to 8.0 denier) and the second single fineness satisfies 1.67 to 6.67 dtex (1.5 to 6.0 denier).
  • the first single fineness and the second single fineness refer to the fineness of one whole monofilament separated from the first lyocell multifilament and the second lyocell multifilament, respectively.
  • the first single fineness may be greater than the second single fineness.
  • the step of spinning the above-described radiation dope can be performed under controlled spinning conditions so that the first single fiber density and the second single fiber density are different.
  • the cross-sectional area of the first discharge port through which the first Lyocell multifilament is injected and the cross-sectional area of the second discharge port through which the second Lyocell multifilament is injected can be different.
  • the cross-sectional area of the first discharge port can be larger than the cross-sectional area of the second discharge port.
  • the first single fineness can be 2.22 to 8.89 dtex (2.0 to 8.0 denier).
  • the upper limit of the first single fineness can be 8.89 dtex (8.0 denier) or less, 7.78 dtex (7.0 denier) or less, 7.22 dtex (6.5 denier) or less, 6.67 dtex (6.0 denier) or less, 6.11 dtex (5.5 denier) or less, 5.56 dtex (5.0 denier) or less, 5.00 dtex (4.5 denier) or less, 3.89 dtex (3.5 denier) or less, 3.33 dtex (3.0 denier) or less, or 2.78 dtex (2.5 denier) or less.
  • the lower limit of the second single-strand fineness can be 2.22 dtex (2.0 denier) or more, 2.78 dtex (2.5 denier) or more, 3.33 dtex (3.0 denier) or more, 3.89 dtex (3.5 denier) or more, 4.44 dtex (4.0 denier) or more, 5.00 dtex (4.5 denier) or more, 5.56 dtex (5.0 denier) or more, 6.11 dtex (5.5 denier) or more, 6.67 dtex (6.0 denier) or more, 7.22 dtex (6.5 denier) or more, 7.78 dtex (7.0 denier) or more, or 8.33 dtex (7.5 denier) or more.
  • the properties (e.g., relatively improved tensile strength) of the first monofilament can be stably provided.
  • the second single fineness can be from 1.67 to 6.67 dtex (1.5 to 6.0 denier).
  • the upper limit of the first single fineness can be no greater than 6.67 dtex (6.0 denier), no greater than 6.11 dtex (5.5 denier), no greater than 5.56 dtex (5.0 denier), no greater than 5.00 dtex (4.5 denier), no greater than 3.89 dtex (3.5 denier), no greater than 3.33 dtex (3.0 denier), or no greater than 2.78 dtex (2.5 denier).
  • the lower limit of the second single-strand fineness can be 1.67 dtex (1.5 denier) or more, 2.22 dtex (2.0 denier) or more, 2.78 dtex (2.5 denier) or more, 3.33 dtex (3.0 denier) or more, 3.89 dtex (3.5 denier) or more, 4.44 dtex (4.0 denier) or more, 5.00 dtex (4.5 denier) or more, 5.56 dtex (5.0 denier) or more, 6.11 dtex (5.5 denier) or more, 6.67 dtex (6.0 denier) or more, 7.22 dtex (6.5 denier) or more, 7.78 dtex (7.0 denier) or more, or 8.33 dtex (7.5 denier) or more.
  • the properties e.g., relatively improved specific surface area
  • the cross-section of the first discharge port and the cross-section of the second discharge port may be independently of each other, i.e., asymmetrical cross-sections.
  • the irregular cross-section may include three or more protrusions.
  • the irregular cross-section may be a Y-shaped cross-section.
  • At least one of the cross sections of the first outlet and at least one of the cross sections of the second outlet may be similar to each other.
  • the cross sections of the first outlet and the cross sections of the second outlet may be similar to each other.
  • the radiation dope discharged through the radiation detention can go through the coagulation step described later.
  • the radiated lyocell spinning dope is coagulated, and lyocell multifilament can be obtained.
  • the above coagulation may be carried out in a manner in which the radiation dope comes into contact with air and/or a coagulating liquid.
  • the solidification may include a first solidification step of supplying cooling air to the radiated lyocell dope; and a second solidification step of introducing the first-solidified radiated dope into a solidification solution to solidify it.
  • the lyocell dope discharged from the spinneret can be first solidified in the space (air gap section) between the spinneret and the solidification tank.
  • cooling air can be supplied from the inside to the outside of the spinneret to this air gap section from an air cooling section located inside the spinneret.
  • the first solidification can be carried out by a so-called air quenching method or means known in the relevant field.
  • the upper temperature limit of the cooling air used for the primary solidification may be, for example, 15° C. or lower.
  • 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 is exceeded, the solidification of the radiation dope by the air is not sufficient, and the radiation-related processability is poor.
  • the lower limit of the cooling air may be determined in consideration of the spinning fairness and/or the cross-sectional uniformity of the filament. For example, when the temperature of the cooling air is lower than 4°C, the surface of the detention is cooled, the surface of the filament becomes uneven, and the spinning fairness is also reduced. Considering this, the cooling air may be 5°C or higher, 6°C or higher, 7°C or higher, 8°C or higher, or 9°C or higher.
  • the degree to which the above cooling air is supplied can be controlled in consideration of sufficient coagulation, spinning processability, and the influence on the properties of the filament.
  • it can be supplied to the spinning dope derived at an air volume of 70 to 400 Nm 3 /h. More specifically, the air volume can be 100 Nm 3 /h or more, 150 Nm 3 /h or more, 200 Nm 3 /h or more, or 250 Nm 3 /h or more, and the upper limit of the air volume can be, 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 or less.
  • the cooled spinning dope can be supplied to a coagulation tank or bath containing a coagulating solution (secondary coagulation step).
  • a coagulating solution can be, for example, 30° C. or lower or 25° C. or lower.
  • the temperature of the coagulating solution can be 10° C. or higher, 15° C. or higher, or 20° C. or higher.
  • the coagulation speed can be appropriately maintained.
  • the type of coagulant for the second coagulation step as described above is not particularly limited.
  • the coagulant may contain one or more of water and N-methylmorpholine-N-oxide (NMMO).
  • NMMO N-methylmorpholine-N-oxide
  • the water content in the coagulant may be 60 to 90 wt% and the NMMO content may be 10 to 40 wt% based on 100 wt% of the total weight of the coagulant.
  • the coagulant may contain 70 to 80 wt% of water and 20 to 30 wt% of NMMO based on 100 wt% of the total weight of the coagulant.
  • the concentration of the coagulant may be controlled to be maintained during the manufacturing process using a sensor or the like.
  • the step of spinning a first lyocell multifilament and the step of spinning a second lyocell multifilament can be performed simultaneously, and the first lyocell multifilament and the second lyocell multifilament can be coagulated and obtained in the same coagulation tank.
  • the step of spinning a first lyocell multifilament and the step of spinning a second lyocell multifilament are performed sequentially, and the first lyocell multifilament and the second lyocell multifilament can be coagulated and obtained in the same coagulation tank.
  • each lyocell multifilament may be washed after the above-described coagulation and multifilament obtaining steps. This washing may remove any remaining NMMO and/or other impurities within the filament.
  • washing may be performed by introducing each coagulated Lyocell multifilament into a washing tank using a traction roller.
  • washing may be performed by spraying the washing liquid during the process of moving to the next step by the traction roller.
  • the washing liquid may contain water, and may further contain known additives.
  • the washing liquid can be used at a temperature of 100°C or lower.
  • a step of emulsifying each lyocell multifilament may be performed.
  • This step is a step of applying an emulsion of the above-described component to the surface of the filament. Through the emulsion treatment, friction applied to the filament is reduced, and crimp can be well formed in the crimp application step described later. If the emulsion treatment is performed twice or more as described later, it may be called a first emulsion treatment and a second emulsion treatment depending on the order.
  • the emulsion treatment may be carried out by immersing each Lyocell multifilament in a bath filled with the emulsion so that each Lyocell multifilament is completely immersed in the emulsion.
  • the emulsion may be treated by spraying the emulsion liquid while moving to the next stage by a traction roller.
  • 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.
  • the emulsion treatment may be performed such that the oil pick up ratio (OPU) of at least 1.0 wt% of the emulsion-treated first lyocell multifilament and the second multifilament is satisfied based on 100 wt% of the emulsion-treated first lyocell multifilament and the second multifilament.
  • OPU oil pick up ratio
  • At this time, at least the emulsion-treated first lyocell multifilament and/or the emulsion-treated second lyocell multifilament may be, for example, each lyocell multifilament to which the first emulsion treatment has been applied, each lyocell multifilament to which the first emulsion treatment and the second emulsion treatment have been applied (see the description below).
  • the first lyocell multifilament and/or the second lyocell multifilament to which the emulsion treatment has been applied as described above may be crimped.
  • the content of the emulsion in at least the first lyocell multifilament and the second lyocell multifilament treated with the emulsion may be 0.5 wt% or more, 1.0 wt% or more, 1.5 wt% or more, 2.0 wt% or more, 2.5 wt% or more, 3.0 wt% or more, specifically 3.5 wt% or more, 4.0 wt% or more, 4.2 wt% or more, 4.5 wt% or more, 5.0 wt% or more, 5.5 wt% or more, 6.0 wt% or more, 6.5 wt% or more, 7.0 wt% or more, 7.5 wt% or more, 8.0 wt% or more, 8.5 wt% or more, 9.0 wt% or more, or 9.5 wt% or more, based on 100 wt% of the total weight of the first lyocell multifilament and/or the second lyocell
  • the upper limit can 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.
  • the content can mean the dry weight after evaporation of a solvent (e.g., water) or a liquid component that may be included in the emulsion.
  • the hydrophilic properties of the lyocell material can be supplemented.
  • drying of the milk may be performed after the milk treatment as described above.
  • one or more of the steps described above may be controlled so that the first single fineness can be 2.22 to 8.89 dtex (2.0 to 8.0 denier).
  • one or more of the steps described above may be controlled so that the second single fineness can be 1.67 to 6.67 dtex (1.5 to 6.0 denier).
  • the first single fineness and the second single fineness refer to the fineness of one whole monofilament separated from the first Lyocell multifilament or the second Lyocell multifilament, respectively.
  • one or more of the steps may be controlled so that the first single fineness is greater than the second single fineness.
  • the first single fineness can be 2.22 to 8.89 dtex (2.0 to 8.0 denier).
  • the upper limit of the first single fineness can be 8.89 dtex (8.0 denier) or less, 7.78 dtex (7.0 denier) or less, 7.22 dtex (6.5 denier) or less, 6.67 dtex (6.0 denier) or less, 6.11 dtex (5.5 denier) or less, 5.56 dtex (5.0 denier) or less, 5.00 dtex (4.5 denier) or less, 3.89 dtex (3.5 denier) or less, 3.33 dtex (3.0 denier) or less, or 2.78 dtex (2.5 denier) or less.
  • the lower limit of the second single-strand fineness can be 2.22 dtex (2.0 denier) or more, 2.78 dtex (2.5 denier) or more, 3.33 dtex (3.0 denier) or more, 3.89 dtex (3.5 denier) or more, 4.44 dtex (4.0 denier) or more, 5.00 dtex (4.5 denier) or more, 5.56 dtex (5.0 denier) or more, 6.11 dtex (5.5 denier) or more, 6.67 dtex (6.0 denier) or more, 7.22 dtex (6.5 denier) or more, 7.78 dtex (7.0 denier) or more, or 8.33 dtex (7.5 denier) or more.
  • the properties (e.g., relatively improved tensile strength) of the first monofilament can be stably provided.
  • the second single fineness can be from 1.67 to 6.67 dtex (1.5 to 6.0 denier).
  • the upper limit of the first single fineness can be no greater than 6.67 dtex (6.0 denier), no greater than 6.11 dtex (5.5 denier), no greater than 5.56 dtex (5.0 denier), no greater than 5.00 dtex (4.5 denier), no greater than 3.89 dtex (3.5 denier), no greater than 3.33 dtex (3.0 denier), or no greater than 2.78 dtex (2.5 denier).
  • the lower limit of the second single-strand fineness can be 1.67 dtex (1.5 denier) or more, 2.22 dtex (2.0 denier) or more, 2.78 dtex (2.5 denier) or more, 3.33 dtex (3.0 denier) or more, 3.89 dtex (3.5 denier) or more, 4.44 dtex (4.0 denier) or more, 5.00 dtex (4.5 denier) or more, 5.56 dtex (5.0 denier) or more, 6.11 dtex (5.5 denier) or more, 6.67 dtex (6.0 denier) or more, 7.22 dtex (6.5 denier) or more, 7.78 dtex (7.0 denier) or more, or 8.33 dtex (7.5 denier) or more.
  • the properties e.g., relatively improved specific surface area
  • the step controlled so as to secure the range of the first single-stranded fiber and/or the second single-stranded fiber can be the spinning step described above.
  • the spinning, coagulation, washing, and emulsion treatment steps described above can all be controlled so as to secure the range of the first single-stranded fiber and/or the second single-stranded fiber.
  • the crimping step is a step of applying pressure to the emulsion-treated first Lyocell multifilament and/or the second Lyocell multifilament by steam and/or a press roller to obtain a crimped multifilament, preferably a crimped tow.
  • the crimping step may be referred to as a crimping step.
  • the terms "emulsion-treated” and “emulsified” may be used interchangeably.
  • crimping waves are imparted to each lyocell multifilament, and the fibers can have bulky characteristics.
  • the crimping can be performed using a known crimping device, such as a stuffer box and/or a steam box, and the usable crimping device is not particularly limited as long as it is a device capable of imparting one or more of the pressures described below.
  • the crimping step may be performed by first supplying steam to each Lyocell multifilament to preheat and swell each Lyocell multifilament, and then pressing each Lyocell multifilament with a press roller to form wrinkles in the Lyocell multifilament.
  • a steam box may be used for supplying steam, and the steam box may be located upstream of the crimping device.
  • the crimping step can be performed in such a way that the pressurization of the lyocell multifilament by the press roller and the steam application are performed simultaneously.
  • the crimping step may be performed by first supplying steam to each lyocell multifilament to preheat and swell each lyocell multifilament, and then simultaneously applying pressure and steam to each lyocell multifilament by a press roller.
  • the crimping step can be performed by applying steam of 0.98 to 19.61 N/cm 2 (0.1 to 2.0 kgf/cm 2 ) to each lyocell multifilament prior to introduction into the crimping device (specifically, the press roller).
  • steam of 1.96 N/cm 2 (0.2 kgf/cm 2 ) or more, 2.94 N/cm 2 (0.3 kgf/cm 2 ) or more, 3.92 N/cm 2 (0.4 kgf/cm 2 ) or more, 4.90 N/cm 2 (0.5 kgf/cm 2 ) or more or 5.88 N/cm 2 (0.6 kgf/cm 2 ) or more can be provided by the steam box.
  • steam of 14.71 N/cm 2 (1.5 kgf/cm 2 ) or less, 13.73 N/cm 2 (1.4 kgf/cm 2 ) or less, 12.75 N/cm 2 (1.3 kgf/cm 2 ) or less, 11.77 N/cm 2 (1.2 kgf/cm 2 ) or less, 10.79 N/cm 2 (1.1 kgf/cm 2 ) or less, or 9.81 N/cm 2 (1.0 kgf/cm 2 ) or less may be provided. If the steam supply amount or pressure is less than the above-described range, the crimp may not be formed smoothly. In addition, if it exceeds the above-described range, the flexibility of the filament increases, so that excessive crimp is imparted to the filament within the crimp device, and the filament may not pass through the crimp device.
  • the crimping step may be performed by pressing each Lyocell multifilament with a press roller to form crimps in each Lyocell multifilament.
  • 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.
  • the crimping step can be performed by independently applying a pressure of 14.71 to 39.23 N/cm 2 (1.5 to 4.0 kgf/cm 2 ) to each lyocell multifilament fed into the crimping device using a press roller.
  • 15.69 N/cm 2 (1.6 kgf/cm 2 ) or more, 16.67 N/cm 2 (1.7 kgf/cm 2 ) or more, 17.65 N/cm 2 (1.8 kgf/cm 2 ) or more, 18.63 N/cm 2 (1.9 kgf/cm 2 ) or more, 19.61 N/cm 2 (2.0 kgf/cm 2 ) or more, 20.60 N/cm 2 (2.1 kgf/cm 2 ) or more, 21.58 N/cm 2 (2.2 kgf/cm 2 ) or more, 22.56 N/cm 2 (2.3 kgf/cm 2 ) or more, 23.54 N/cm 2 (2.4 kgf/cm 2 ) or more, or 24.52 N/cm 2 (2.5 A pressure of more than 10 kgf/cm 2 can be applied to the lyocell multifilament through a press roller.
  • the pressure of the press roller is within the above range. If it is less than the above range, the desired number of crimps may not be formed sufficiently. In addition, if the roller pressure exceeds the above range, the pressing force may be too strong and the filament may not be smoothly fed into the crimp device or pass through the stuffer box. Wrinkles may be formed in the lyocell multifilament by the press roller providing the above pressure.
  • a pressure of 0.98 to 19.61 N/cm 2 (0.1 to 2 kgf/cm 2 ) can be applied independently to each lyocell multifilament using the top plate. Additionally, the top plate can apply a pressure to each lyocell multifilament while the individual lyocell multifilaments pass through or are passing through the press rollers.
  • the pressure applied by the upper plate can be 1.96 N/cm 2 (0.2 kgf/cm 2 ) or more, 2.94 N/cm 2 (0.3 kgf/cm 2 ) or more, 3.92 N/cm 2 (0.4 kgf/cm 2 ) or more, or 4.90 N/cm 2 (0.5 kgf/cm 2 ) or more.
  • the upper plate can move up and down to provide uniform crimping. If the pressure of the upper plate is less than 0.98 N/cm 2 (0.1 kgf/cm 2 ), the upper plate may not be fixed due to the pressure inside the crimp device, so that the lyocell multifilaments may remain in the crimp device for a short time and a desired number of crimps may not be provided, and the lyocell multifilaments may remain in the crimp device for a long time and the continuity of the process may not be maintained. If the pressure of the upper plate exceeds 19.61 N/cm 2 (2 kgf/cm 2 ), the lyocell multifilaments may not be smoothly discharged from the crimp device, and the shape of the crimp may be irregularly formed.
  • the crimping step may include a doctor blade that applies a predetermined pressure to each lyocell multifilament.
  • the doctor blade controls the residence time of the filaments fed into the crimper stuffer box, thereby contributing to the control of the number of crimps.
  • the doctor blade may be positioned, for example, in the path of each lyocell multifilament that is discharged from the roller pressure point after being pressed by the roller described above.
  • the crimping step can be performed by independently applying a pressure of 0.98 to 19.61 N/cm 2 (0.1 to 2.0 kgf/cm 2 ) to each lyocell multifilament passing through the roller of the crimping device using a doctor blade.
  • the pressure applied by the doctor blade can be 1.96 N/cm 2 (0.2 kgf/cm 2 ) or more, 2.94 N/cm 2 (0.3 kgf/cm 2 ) or more, 3.92 N/cm 2 (0.4 kgf/cm 2 ) or more, or 4.90 N/cm 2 (0.5 kgf/cm 2 ) or more.
  • the crimping step can be performed at a temperature condition in the range of 120 to 250°C.
  • the lower limit of the temperature condition can be 125°C, 130°C, 135°C, 140°C, 145°C or 150°C.
  • the upper limit of the temperature condition can be 200°C, 195°C, 190°C, 185°C, 180°C, 175°C, 170°C, 165°C or 160°C.
  • the crimping step is performed under temperature conditions below 120°C, the shape of the crimp may not be stably maintained. If the crimping step is performed under temperature conditions above 250°C, the concentration of the oil content in the crimping device may increase and the formation of the crimp may be restricted.
  • a secondary emulsion treatment (f1) may be additionally performed.
  • the secondary emulsion treatment may further impart flexibility to the tow.
  • the secondary emulsion treatment may be performed in the same manner as or in accordance with the (d) emulsion treatment step described above.
  • the secondary emulsion treatment can be performed by emulsifying the lyocell material (e.g., lyocell tow) that has undergone a process by a crimper.
  • lyocell material e.g., lyocell tow
  • the secondary emulsion treatment can not only ensure that the fibers and the filter can be spread well in air during the spreading process, but can also limit the cutting of the fibers during the drawing process.
  • 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.
  • a drying process may be additionally performed.
  • the drying process may be performed at a temperature ranging from 100 to 130° C.
  • the drying process method or method is not particularly limited, and known techniques may be used.
  • the drying process may be performed by applying hot air to the tow or passing the tow through or leaving it in a temperature-controlled room for a certain period of time.
  • the present invention provides a lyocell material obtained by a method for producing a lyocell material as described above.
  • the present invention provides a lyocell material obtainable by a method for producing a lyocell material as described above.
  • the lyocell material produced 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.
  • the lyocell material may be incorporated into a combustible cigarette.
  • the lyocell material may be incorporated into a heated cigarette, and the heated cigarette may be used in conjunction with an aerosol generating device (not shown).
  • the smoking article when used as a heated smoking article, the smoking article may be separately inserted into an aerosol generating device.
  • the aerosol generating device includes 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 generally controlling the 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.
  • the smoking article may include a tobacco medium, a filter for the 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 a rear end or a front end.
  • the tobacco medium and the filter for the smoking article may each include a single segment, or may independently include a plurality of segments.
  • the above tobacco medium comprises a tobacco substance, and the tobacco substance comprises nicotine.
  • the tobacco medium may additionally comprise one or more excipients.
  • Excipients may include binders, fillers, and other additives.
  • the tobacco medium included in the tobacco medium portion may be manufactured in the form of granules containing tobacco materials and excipients.
  • a filler may be additionally included.
  • a lyocell material may be included in the tobacco medium.
  • a lyocell material may be used as a filler.
  • 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.
  • Lyocell material may be used in a filter for a smoking article.
  • the lyocell material may be lyocell tow.
  • the lyocell tow comprises a first crimped lyocell multifilament and a second crimped lyocell multifilament.
  • the present application relates to a filter for a smoking article.
  • the filter for a smoking article comprises a lyocell material, and the lyocell material may be the same as described above.
  • the filter for a smoking article comprises lyocell tow, and the lyocell tow may be the same as described above.
  • the lyocell material contains the emulsion in an amount of 0.1 wt% or more relative to 100 wt% of the total lyocell material.
  • the description of the emulsion components and content according to the specific example of the present application is the same as described above.
  • the single fiber counts of the filaments forming the first Lyocell multifilament and/or the second Lyocell multifilament may independently be 1.67 to 8.89 dtex (1.5 to 8.0 denier). The specific values are the same as described above.
  • the total fineness of the lyocell material may be 1,667 to 6,111 tex (15,000 to 55,000 denier), and preferably, the lyocell material may be lyocell tow.
  • the specific values are the same as described above.
  • the first Lyocell multifilament and/or the second Lyocell multifilament imparted with crimps can independently have crimps of from 3.94 to 19.69 per centimeter (10 to 50 per inch). The specific values are the same as described above.
  • the filter for the smoking article may further comprise a paper roll (which may be referred to as a wrapping paper, a filter paper or a filter paper roll).
  • the paper roll may be a porous paper or a non-porous paper that wraps the above-described lyocell tow and is capable of maintaining the filter shape (e.g., a cylinder or a cylindrical shape).
  • the filter for the smoking article may have a predetermined shape and size.
  • the filter may have a rod shape. More specifically, the filter for the smoking article may have a cylindrical shape.
  • the filter may have a length of, for example, 10 to 50 mm.
  • 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.
  • the filter having the length may have a circular cross-section, and the circumference of the circular cross-section may be 10 to 40 mm.
  • the circumference 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, or 35 mm or more, and an upper limit of 35 mm or less, 30 mm or less, 25 mm or less, 20 mm or less, or 15 mm or less.
  • 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 therefore is omitted.
  • the above-mentioned paper may be porous paper or non-porous paper that can wrap the above-mentioned lyocell tow and maintain a filter shape (e.g., a cylinder or a cylindrical shape).
  • a filter shape e.g., a cylinder or a cylindrical shape
  • the paper when a porous paper is used, the paper may have a porosity of from 10 to 50,000 Coresta Units (CU).
  • a Coresta Unit may be defined as the volumetric flow rate (cm 3 min -1 ) of air passing through a 1 cm 2 sample of substrate (i.e., the porous paper) at a pressure difference of 1 kPa.
  • the lower limit of the porosity of the 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
  • 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.
  • the paper may have a porosity within a range of 22,000 to 26,000 CU or 23,000 to 25,000 CU.
  • the basis weight of the paper can be from 15 to 60 g/cm 2 .
  • the lower limit of the basis weight of the paper can be, for example, 20 g/cm 2 or more, 25 g/cm 2 or more, 30 g/cm 2 or more, 35 g/cm 2 or more, 40 g/cm 2 or more, 45 g/cm 2 or more, 50 g/cm 2 or more, or 55 g/cm 2 or more
  • the upper limit can be, for example, 55 g/cm 2 or less, 50 g/cm 2 or less, 45 g/cm 2 or less, 40 g/cm 2 or less, 35 g/cm 2 or less, 30 g/cm 2 or less, 25 g/cm 2 or less, or 20 g/cm 2 or less.
  • the paper may have a basis weight of 16 g/cm 2 or more, 17 g/cm 2 or more, 18 g/cm 2 or more, 19 g/cm 2 or more, 20 g/cm 2 or more or 21 g/cm 2 or more, and 25 g/cm 2 or less, 24 g/cm 2 or less, 23 g/cm 2 or less, 22 g/cm 2 or less or 21 g/cm 2 or less.
  • the weight of the rod-shaped filter can be 50 mg or more.
  • the weight of the filter can have, for example, a lower limit of 100 mg or more, 150 mg or more, or 200 mg or more, and an upper limit of 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.
  • 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, the method including a method for manufacturing the lyocell material as described above.
  • the step of manufacturing the filter can be appropriately performed by a person skilled in the art according to a known method.
  • the filter can be manufactured by making a paper filled with lyocell material into a rod shape.
  • the filter can be manufactured by cutting a filter paper filled with lyocell material having a rod shape into an appropriate length. The description of the paper is as described above.
  • additional opening or plasticizing treatment may be performed on the lyocell material.
  • the surface area of the lyocell material may be increased by opening the lyocell material.
  • opening of the lyocell material may be performed by applying an external force in the length direction, width direction, and/or thickness direction.
  • the lyocell material used in the manufacture of filters for smoking articles may be lyocell tow.
  • the filter for a smoking article may additionally contain known cellulose acetate multifilaments as long as 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 contained in a segment distinct from the segment containing the lyocell multifilaments.
  • a lyocell material for a smoking article filter that can replace commercialized cellulose acetate (CA) and a filter for a smoking article comprising the same are provided.
  • a lyocell material that can evenly enjoy the properties of a first monofilament having a first single fineness and the properties of a second monofilament having a second single fineness is provided.
  • Lyocell material was manufactured through the same process as described in the manufacturing example below. Conditions not specifically mentioned were within the scope of the above description.
  • Cellulose pulp having an alpha-cellulose content of 93.9% and a degree of polymerization (DPw) of 820 was mixed with an NMMO/ H2O solvent having a propyl gallate content of 0.01 wt% to produce a spinning dope having a concentration of 11 wt%. Then, the spinning dope was spun while appropriately controlling the discharge amount and spinning speed while maintaining the spinning temperature at 110°C in the spinneret.
  • DPw degree of polymerization
  • the spinning dope on the filament ejected from the spinneret was supplied to the coagulating liquid (the coagulating liquid having a concentration including 75 wt% of water and 25 wt% of NMMO and a temperature of approximately 25°C) in the coagulating tank through the air gap section.
  • the cooling air in the air gap section primarily coagulates the spinning dope at a temperature of 8°C and an air flow rate of 100 Nm 3 /h.
  • the concentration of the coagulating liquid was continuously monitored using a sensor and a refractometer.
  • the coagulated lyocell filament was washed. Specifically, the filament was introduced into the traction roller, and the NMMO remaining in the filament was removed with the washing liquid sprayed from the washing device. And, the washed filament was immersed inside a bath designed with a predetermined emulsion concentration.
  • the filament was processed at a pressure of 19.61 N/cm 2 (2 kgf/cm 2 ) by a nip roll installed at the bath discharge section and fed into a crimp machine for crimping.
  • the pressure of the press roller was set to 24.52 N/cm 2 (2.5 kgf/cm 2 ), and the pressure of the doctor blade was set to 4.90 N/cm 2 (0.5 kgf/cm 2 ), thereby producing lyocell tow.
  • the total fineness of the manufactured tow was 3,333 to 5,000 tex (30,000 to 45,000 denier), and the crimp count was 5.91 to 15.75 ea/cm (15 to 40 ea/inch).
  • Lyocell tow is manufactured according to the above manufacturing example, wherein the spinnerets each include a first discharge port through which a first Lyocell multifilament is injected and a second discharge port through which a second Lyocell multifilament is injected.
  • the first single fiber count of the first monofilament ejected from the first outlet was 2.67 dtex (2.4 denier)
  • the second single fiber count of the second monofilament ejected from the second outlet was 2.22 dtex (2.0 denier).
  • the number of first and second discharge ports was appropriately adjusted so that the weight ratio of the first lyocell multifilament and the second lyocell multifilament included in the lyocell tow was 90 to 10.
  • Example 1 The same procedure as in Example 1 was followed, except that the number of first and second discharge ports was appropriately adjusted so that the weight ratio of the first lyocell multifilament and the second lyocell multifilament was as shown in Table 1 below.
  • Lyocell tow is manufactured according to the above manufacturing example, wherein the spinnerets each include a first discharge port through which a first Lyocell multifilament is injected and a second discharge port through which a second Lyocell multifilament is injected.
  • the first single fiber count of the first monofilament ejected from the first outlet was 7.22 dtex (6.5 denier), and the second single fiber count of the second monofilament ejected from the second outlet was 6.11 dtex (5.5 denier).
  • the number of first and second discharge ports was appropriately adjusted so that the weight ratio of the first lyocell multifilament and the second lyocell multifilament included in the lyocell tow was 90 to 10.
  • Example 6 The same procedure as in Example 6 was repeated, but the number of first and second discharge ports was appropriately adjusted so that the weight ratio of the first lyocell multifilament and the second lyocell multifilament was as shown in Table 1 below.
  • Lyocell tow is manufactured according to the above manufacturing example, wherein the spinnerets each include a first discharge port through which a first Lyocell multifilament is injected and a second discharge port through which a second Lyocell multifilament is injected.
  • the first single fiber count of the first monofilament ejected from the first outlet was 8.89 dtex (8.0 denier)
  • the second single fiber count of the second monofilament ejected from the second outlet was 1.67 dtex (1.5 denier).
  • the number of first and second discharge ports was appropriately adjusted so that the weight ratio of the first lyocell multifilament and the second lyocell multifilament included in the lyocell tow was 90 to 10.
  • Example 11 The same procedure as in Example 11 was followed, except that the number of first and second discharge ports was appropriately adjusted so that the weight ratio of the first lyocell multifilament and the second lyocell multifilament was as shown in Table 1 below.
  • Lyocell tow is manufactured according to the above manufacturing example, wherein the spinnerets each include a first discharge port through which a first Lyocell multifilament is injected and a second discharge port through which a second Lyocell multifilament is injected.
  • the first single fiber count of the first monofilament ejected from the first outlet was 2.22 dtex (2.0 denier)
  • the second single fiber count of the second monofilament ejected from the second outlet was 1.67 dtex (1.5 denier).
  • the number of first and second discharge ports was appropriately adjusted so that the weight ratio of the first lyocell multifilament and the second lyocell multifilament included in the lyocell tow was 90 to 10.
  • Example 16 The same procedure as in Example 16 was repeated, but the number of first and second discharge ports was appropriately adjusted so that the weight ratio of the first lyocell multifilament and the second lyocell multifilament was as shown in Table 1 below.
  • Lyocell tow is manufactured according to the above manufacturing example, wherein the spinnerets each include a first discharge port through which a first Lyocell multifilament is injected and a second discharge port through which a second Lyocell multifilament is injected.
  • the first single fiber count of the first monofilament ejected from the first outlet was 8.89 dtex (8.0 denier)
  • the second single fiber count of the second monofilament ejected from the second outlet was 6.67 dtex (6.0 denier).
  • the number of first and second discharge ports was appropriately adjusted so that the weight ratio of the first lyocell multifilament and the second lyocell multifilament included in the lyocell tow was 90 to 10.
  • Example 21 The same procedure as in Example 21 was repeated, but the number of first and second discharge ports was appropriately adjusted so that the weight ratio of the first lyocell multifilament and the second lyocell multifilament was as shown in Table 1 below.
  • Lyocell tow was manufactured according to the above manufacturing example, wherein the spinneret included only a first outlet through which the first Lyocell multifilament was ejected.
  • the first single denier of the first monofilament ejected from the first outlet was 2.67 dtex (2.4 denier).
  • Lyocell tow was manufactured according to the above manufacturing example, except that the spinneret included only a second outlet through which second Lyocell multifilaments were ejected.
  • the second monofilament ejected from the second outlet had a second single denier of 2.22 dtex (2.0 denier).
  • Lyocell tow was manufactured according to the above manufacturing example, wherein the spinneret included only a first outlet through which the first Lyocell multifilament was ejected.
  • the first single denier of the first monofilament ejected from the first outlet was 7.22 dtex (6.5 denier).
  • Lyocell tow was manufactured according to the above manufacturing example, except that the spinneret included only a second outlet through which second Lyocell multifilaments were ejected.
  • the second monofilament ejected from the second outlet had a second single denier of 6.11 dtex (5.5 denier).
  • Filters for smoking articles were manufactured, each comprising the lyocell tow of Examples 1 to 25 and Comparative Examples 1 to 4.
  • the filters for smoking articles were prepared in a rod shape.
  • the minimum and maximum weights that could be manufactured as a filter were measured, respectively. The measurement results are shown in Table 2 below.
  • Example Comparative example 1 2 3 4 5 1 2 Minimum filter weight (mg 1 ) 470 460 450 465 470 480 470 Maximum filter weight (mg 2 ) 1000 1050 1080 1065 1050 980 960 ⁇ mg (mg 2 -mg 1 ) 530 590 630 600 580 500 490
  • Example Comparative example 6 7 8 9 10 3 4 Minimum filter weight (mg 1 ) 230 240 250 255 265 290 300
  • Example 11 12 13 14 15 Minimum filter weight (mg 1 ) 270 260 250 255 260
  • the smoking article filters comprising lyocell tow according to Examples 1 to 5 and Examples 16 to 20 have larger ⁇ mg values than the smoking article filters comprising lyocell tow according to Comparative Examples 1 to 4.
  • the smoking article filters comprising lyocell tow according to Examples 6 to 10, Examples 11 to 15 and Examples 21 to 25 have larger ⁇ mg values than the smoking article filters comprising lyocell tow according to Comparative Examples 3 to 4.
  • the lyocell materials of Examples 16 to 20 including both monofilaments having a first single fineness of 2.22 dtex (2.0 denier) and monofilaments having a second single fineness of 1.67 dtex (1.5 denier) can be used as a filter for smoking articles to provide an even larger ⁇ mg value by mixing monofilaments having different single finenesses.
  • the lyocell material of Examples 11 to 15 including both a monofilament having a first single denier of 8.89 dtex (8.0 denier) and a monofilament having a second single denier of 1.67 dtex (1.5 denier) can be used as a filter for smoking articles to provide an even larger ⁇ mg value, by mixing monofilaments having different single denieres, compared to Comparative Example 3 including only a monofilament having a single denier of 6.67 dtex (6.0 denier) and Comparative Example 4 including only a monofilament having a single denier of 6.11 dtex (5.5 denier).
  • the lyocell material of Examples 21 to 25 which includes both a monofilament having a first single denier of 8.89 dtex (8.0 denier) and a monofilament having a second single denier of 6.67 dtex (6.0 denier), can be used as a filter for smoking articles to provide an even larger ⁇ mg value by mixing monofilaments having different single deniers, as compared to Comparative Example 3 which includes only a monofilament having a single denier of 6.67 dtex (6.0 denier) and Comparative Example 4 which includes only a monofilament having a single denier of 6.11 dtex (5.5 denier).
  • the lyocell material according to the exemplary embodiment can be used both for the production of a filter for a smoking article having a lower weight and for the production of a filter for a smoking article having a higher weight, by including two or more monofilaments having different single filaments, compared to the comparative lyocell material including monofilaments having substantially one single filament.
  • Filters for smoking articles were manufactured, each comprising the lyocell tow of Examples 1 to 10 and Comparative Examples 1 to 4.
  • the filters for smoking articles were each prepared in a rod shape.
  • the minimum and maximum suction resistances that could be provided as a filter were measured, respectively.
  • the suction resistance value was calculated based on the pressure difference ( mmH2O ) measured at both ends of the filter for smoking articles when air was passed through it at a constant rate (17.5 ml/sec) under standard conditions (22 ⁇ 2 degrees (°C)).
  • Example Comparative example 1 2 3 4 5 1 2 Minimum suction resistance ( mmH2O1 ) 235 225 220 230 235 250 245 Maximum suction resistance (mmH 2 O 2 ) 830 860 890 865 840 820 800 ⁇ mmH 2 O(mmH 2 O 1 - mmH 2 O 2 ) 595 635 670 635 605 570 555
  • Example Comparative example 6 7 8 9 10 3 4 Minimum suction resistance ( mmH2O1 ) 320 330 370 360 325 400 420 Maximum suction resistance (mmH 2 O 2 ) 1050 1080 1100 1090 1030 1000 990 ⁇ mmH 2 O(mmH 2 O 1 - mmH 2 O 2 ) 720 760 790 730 705 600 570
  • the smoking article filters comprising lyocell tow according to Examples 1 to 25 have a larger ⁇ mmH2O value than the smoking article filters comprising lyocell tow according to Comparative Examples 1 to 2.
  • the filters for smoking articles comprising lyocell tow according to Examples 6 to 15 and Examples 21 to 25 were confirmed to have ⁇ mmH 2 O values exceeding 700 mmH 2 O.
  • the lyocell material according to the exemplary embodiment can be used to implement lower suction resistance and higher suction resistance, respectively, compared to the lyocell material of the comparative example.
  • the lyocell material according to the exemplary embodiment will provide consumers and manufacturers of smoking articles with wider choices in terms of diversification and optimization of filters for smoking articles.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
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Abstract

La présente invention concerne un matériau de lyocell, un filtre d'article à fumer comprenant le matériau lyocell, et un article à fumer. Le matériau lyocell et le filtre d'article à fumer selon la présente invention peuvent remplacer des matériaux et des filtres d'acétate de cellulose classiques.
PCT/KR2024/019853 2023-12-08 2024-12-05 Matériau lyocell, filtre d'article à fumer, article à fumer et leurs procédés de fabrication Pending WO2025121911A1 (fr)

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US4292984A (en) * 1978-04-22 1981-10-06 Daicel Ltd. Filter for cigarette smoke
KR101455002B1 (ko) * 2013-06-28 2014-11-03 코오롱인더스트리 주식회사 담배필터용 라이오셀 소재 및 그 제조방법
KR20150116612A (ko) * 2014-04-08 2015-10-16 주식회사 케이티앤지 담배 필터, 이의 제조방법 및 이를 포함하는 담배
KR20160041664A (ko) * 2014-10-08 2016-04-18 주식회사 케이티앤지 담배 필터 및 이의 제조방법
KR20230100668A (ko) * 2021-12-28 2023-07-05 코오롱인더스트리 주식회사 라이오셀 소재, 담배 필터 및 그 제조방법

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GB9412311D0 (en) * 1994-06-20 1994-08-10 Courtaulds Fibres Holdings Ltd Filter materials
JP6370890B2 (ja) * 2013-09-26 2018-08-08 コーロン インダストリーズ インク タバコフィルター用リヨセル素材及びその製造方法
KR102211219B1 (ko) * 2014-06-30 2021-02-03 코오롱인더스트리 주식회사 담배필터용 이형단면 라이오셀 소재 및 그 제조방법
JP2024523387A (ja) * 2021-09-30 2024-06-28 コーロン インダストリーズ インク タバコフィルタ用リヨセル素材及びその製造方法
GB202311839D0 (en) * 2023-08-01 2023-09-13 Nicoventures Trading Ltd A material for use as a component for an aerosol provision article

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4292984A (en) * 1978-04-22 1981-10-06 Daicel Ltd. Filter for cigarette smoke
KR101455002B1 (ko) * 2013-06-28 2014-11-03 코오롱인더스트리 주식회사 담배필터용 라이오셀 소재 및 그 제조방법
KR20150116612A (ko) * 2014-04-08 2015-10-16 주식회사 케이티앤지 담배 필터, 이의 제조방법 및 이를 포함하는 담배
KR20160041664A (ko) * 2014-10-08 2016-04-18 주식회사 케이티앤지 담배 필터 및 이의 제조방법
KR20230100668A (ko) * 2021-12-28 2023-07-05 코오롱인더스트리 주식회사 라이오셀 소재, 담배 필터 및 그 제조방법

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