WO2015136573A1 - シガレットフィルター用のセルロースアセテートのトウバンド、シガレットフィルター、トウバンドの製造装置、及びトウバンドの製造方法 - Google Patents
シガレットフィルター用のセルロースアセテートのトウバンド、シガレットフィルター、トウバンドの製造装置、及びトウバンドの製造方法 Download PDFInfo
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- WO2015136573A1 WO2015136573A1 PCT/JP2014/001449 JP2014001449W WO2015136573A1 WO 2015136573 A1 WO2015136573 A1 WO 2015136573A1 JP 2014001449 W JP2014001449 W JP 2014001449W WO 2015136573 A1 WO2015136573 A1 WO 2015136573A1
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- tow band
- filament
- denier
- spinning
- cellulose acetate
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- 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
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- 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
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- 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
- A24D3/0229—Filter rod forming processes
- A24D3/0237—Filter rod forming processes by extrusion
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- 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
- A24D3/04—Tobacco smoke filters characterised by their shape or structure
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- 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
Definitions
- the present invention relates to a cellulose acetate tow band, a cigarette filter manufactured from the tow band, an apparatus and method for manufacturing the tow band.
- Cellulose acetate tow bands are well known as materials for cigarette filters.
- the spinning machine comprises a plurality of spinning cylinders, each spinning cylinder comprising a spinneret with a large number of spinning holes.
- the stock spinning solution is discharged from a large number of spinning holes to form a large number of filaments, and the large number of filaments are collected to form a yarn.
- the tow band is produced by unifying the yarns from all the spinning cylinders and crimping.
- filter rods are manufactured from tow bands.
- the filter rod is manufactured by opening a tow band, adding a plasticizer such as triacetin thereto, molding it into a cylindrical shape, and winding it with a wrapping paper.
- the cigarette filter is manufactured by cutting the filter rod into a predetermined length.
- a “filament” is a single fiber (single fiber) extruded from a single spinning hole.
- a “yarn” is one fiber bundle (aggregate of single fibers) obtained by combining a large number of filaments formed by a certain spinning tube.
- a “tow band” is a fiber bundle obtained by combining all the yarns corresponding to the number of spinners, that is, all the filaments formed by the spinner. The tow band indicates, in a narrow sense, an assembly of a large number of crimped filaments.
- the fiber bundle or aggregate thus defined may be called “filter tow” or simply “tow” instead of "tow band”.
- “Filament denier” is the fineness of a filament represented by mass (g) per unit length (9000 m), and may be abbreviated as “FD” hereinafter. That is, the FD of a tow band means the fineness of one filament constituting the tow band.
- “Total denier” is the fineness of a tow band represented by mass (g) per unit length (9000 m), and may be abbreviated as “TD” hereinafter.
- the "packed amount” is the net weight of the tow band that is packed into one filter rod.
- an H-type filament is produced using a spinneret having a square orifice, and a bundle thereof is used for a cigarette filter or the like.
- Patent Document 2 discloses a fine-rolled cigarette.
- the cigarette comprises a filter including a filter member and a paper roll wound around the filter member, and a tipping paper adhered on the cigarette rod and the filter so as to connect the cigarette rod and the filter.
- a through hole is formed so as to penetrate the tipping paper and the roll paper, and air is allowed to flow in at the time of smoke absorption.
- the filter member comprises a tow, the tow having an FD greater than 8.0 denier and a TD less than 15,000 denier, which is intended to lower the air flow resistance in combination with the through holes. Furthermore, it is presumed that the amount of stuffing is lowered to lower the air flow resistance.
- the air resistance can be reduced.
- the hardness of the cigarette filter also decreases. Then, since the cigarette filter is easily deformed during smoking, it is difficult for the smoker to smoke the cigarette.
- the amount of inflow of air from the tip of the cigarette is reduced instead of the amount of inflow of air from the through hole, so there is a problem that the amount of tar generated by smoking is reduced.
- Patent Document 2 in order to provide a volume suitable for the super slim type, the TD is made smaller, and in order to lower the air flow resistance which is increased by thinning, the FD is made larger. As a result, the number of filaments constituting the tow decreases. However, if the TD is small and the number of filaments is small, it is difficult to crimp the tow uniformly in its length direction and width direction, and it is difficult to stabilize the quality of the tow. If the crimp is not constant, the air flow resistance of the cigarette filter also fluctuates, making it difficult to stabilize the quality of the cigarette filter.
- the present invention manufactures a cigarette filter capable of suppressing air flow resistance and its variation while maintaining hardness, a cellulose acetate tow band that produces such an effect when used as a cigarette filter, and such a tow band. It is an object of the present invention to provide an apparatus and method for
- a cellulose acetate tow band for a cigarette filter according to an embodiment of the present invention is formed by bundling a plurality of filaments discharged from each of a plurality of spinning holes into a bundle and crimping, and the filament denier is 5.0 It is denier or more, and the Feret area of the filament is 0.5 or more.
- the "Feret area” is an index that can be used to assess the heterogeneity of the filament cross section.
- a cross section is taken by cutting the filament perpendicularly to the longitudinal direction of the filament at an arbitrary point, and a parallelogram circumscribing the cross section is assumed (see FIG. 5).
- one of the two pairs of opposite sides is a two parallel line circumscribing the cross section and the distance between the lines is a maximum value (so-called maximum Feret diameter),
- the other is two parallel lines circumscribing the cross section and the distance between the lines is a minimum value (so-called minimum Feret diameter).
- the Feret area is an area ratio obtained by dividing the cross sectional area of the filament by the area of the virtual parallelogram, in other words, the occupancy of the filament cross section in the virtual parallelogram.
- the filament longitudinal direction is oriented substantially perpendicular to the mainstream smoke flow of the cigarette (see FIG. 6). Mainstream smoke is blocked by the filaments arranged in this way, and droplets contained in the mainstream smoke collide with the filaments and are collected.
- the blocking ability of the filament is roughly equivalent to the blocking ability of a virtual filament having a cross-sectional shape of a parallelogram assumed in deriving the Feret area.
- a small Feret area indicates that the blocking ability of the filament is high relative to the cross-sectional area of the filament. Since the cross-sectional area of the filament is positively correlated with the mass of the tow band (tow stuffed weight), a small Feret area indicates that a small tow band mass can block more mainstream smoke.
- Feret area becomes ⁇ r 2 / 4r 2, or about 0.785
- r is a radius of a perfect circular cross section, but such a filament is considered as an inefficient material which is not excellent in collection performance with respect to mass, and it has been attempted how to reduce the Feret area.
- cross-sectional deformation has been attempted, and as mentioned above, irregular-shaped spinning holes and irregular-shaped cross sections have been preferred.
- the Feret area is less than 0.5 because the Y-shaped cross section corresponds to a partially contracted deformation of the triangle. Become. As such, if the cross-sectional deformation becomes remarkable, the Feret area becomes smaller.
- the tow band is composed of filaments of relatively large fere area, contrary to the conventional development concept, It was conceived that the tow band could reduce the blocking ability even with the same mass conditions as the conventional tow band composed of filaments having a deformed cross section, and that the air flow resistance could also be reduced accordingly.
- the toe band since the filament is relatively large at 5.0 or more, the air flow resistance can be suppressed. Furthermore, the Feret area of the filament is 0.5 or more, which is larger than that of the filament having a Y-shaped or H-shaped cross section which has been generally used in the past, and the heteromorphism is suppressed. Therefore, when the tow band cigarette filter is put into practical use, the air flow resistance can be suppressed relative to the mass (even if the toe stuffing weight is increased). Further, when this tow band is used as a cigarette filter, air flows smoothly along the outer surface of the filament in the cigarette filter, and the air flow resistance is suppressed. And since the air flow resistance is suppressed, it is possible to keep the number of filaments large.
- the air flow resistance can be suppressed when used as a cigarette filter. For this reason, it is not necessary to reduce the amount of packing, and the hardness of the cigarette filter can be maintained high. In addition, it is not necessary to make the total denier particularly small, so it is not necessary to reduce the number of filaments constituting the tow band, and the tow band can be subjected to a stable crimp treatment. Therefore, the quality and productivity of the tow band can be increased. And when manufacturing a cigarette filter by using this tow band as a raw material, ventilation resistance and its fluctuation can be suppressed, maintaining high hardness.
- the filament denier may be 10 denier or less.
- the Feret area may be 0.9 or less.
- the total denier may be 14,000 denier or more.
- the total denier may be 22,000 or less.
- the total denier is 15,000 to 21,000 denier, more preferably 15,000 to 20,000, denier.
- a cellulose acetate tow band for a cigarette filter according to another embodiment of the present invention is formed by bundling a plurality of filaments discharged from each of a plurality of spinning holes into a bundle and crimping, and the filament denier is 5.0
- the area of the cross section of the filament is S and the circumferential length of the cross section is L
- the ratio S / L of the area and the circumferential length is 5 or more.
- the “ratio S / L” is also an index used to evaluate the irregular shape of the filament cross section, as in the case of the Feret area. It can be considered that the surface of the filament collects the droplets contained in mainstream smoke as an aerosol. In that case, the smaller the ratio S / L, the higher the collection performance with respect to the cross-sectional area of the filament and thus the toe packing weight. If the irregularity of the filament cross section is remarkable, the ratio S / L decreases. The inventor has found that the ratio S / L can be controlled to an appropriate range by setting the filament denier to a specific range.
- the ratio S / L is It can be controlled to an appropriate range of 5 or more. Furthermore, since the ratio S / L is 5 or more, when this tow band is used as a cigarette filter, the air flow resistance can be suppressed compared to the toe stuffed weight. For this reason, it is not necessary to reduce the amount of packing, the total denier and the number of filaments. Therefore, the productivity of the tow band can be increased, and when the cigarette filter is manufactured from this tow band, the air flow resistance and its variation can be suppressed while maintaining high hardness.
- the filament denier may be 10 denier or less, and the ratio S / L may be 9 or less.
- the cigarette filter according to one aspect of the present invention is manufactured from the tow band and has a circumferential length of 14 to 18 mm, preferably 14 to 17 mm, more preferably 14 to 15 mm. Thereby, even if it is a thin cigarette, ventilation resistance and its fluctuation can be controlled, maintaining hardness of a cigarette filter highly.
- An apparatus for producing a cellulose acetate tow band for a cigarette filter is a cigarette filter, in which a plurality of filaments discharged from each of a plurality of spinning holes are united and crimped in a bundle.
- An apparatus for producing a tow band of cellulose acetate comprising: a spinneret having the plurality of spinning holes, wherein the spinning holes are circular, and the diameter thereof is 50 ⁇ m or more.
- a method for producing a cellulose acetate tow band for a cigarette filter comprising the steps of: discharging a stock spinning solution from each of a plurality of spinning holes to form a plurality of filaments; And forming a tow band, wherein the spinning holes are circular, and the diameter thereof is 50 ⁇ m or more.
- the filament denier becomes large and the change in cross-sectional shape becomes large, so that the spinning holes are made circular.
- a filament having a filament denier of 5.0 denier or more and having a relatively smooth cross-sectional shape having a Feret area of 0.5 or more and / or a ratio S / L of 5 or more is formed.
- the spinning holes may be circular and the diameter may be 100 ⁇ m or less. As a result, it is possible to form a filament having a filament denier of 10 denier or less, and a filament area of 0.9 or less and / or a ratio S / L of 9 or less.
- a cigarette filter capable of suppressing air flow resistance and its fluctuation while maintaining hardness
- a cellulose acetate tow band which produces such an effect when used as a cigarette filter.
- an apparatus and method for manufacturing such a tow band can be provided.
- FIG. 1 is a schematic view showing an apparatus and method for producing a cellulose acetate tow band TB for a cigarette filter according to an embodiment.
- the tow band manufacturing apparatus 1 includes a mixer 2, a filter 3, a spinning machine 4, a crimper 5, a dryer 6 and a packer 7.
- a spinning stock solution (hereinafter sometimes simply referred to as "dope") is prepared (stock solution preparation step).
- stock solution preparation step cellulose acetate is dissolved in an organic solvent such as acetone in mixer 2 to prepare a solution of a required concentration (for example, a weight concentration of preferably 20 wt% to 30 wt%, preferably 26 wt%).
- the solution is then filtered in a filter 3. This filtrate is used as a spinning stock solution.
- tow band TB of cellulose acetate is produced from the stock solution for spinning using the spinning machine 4, crimper 5 and dryer 6 (spinning step).
- the toe band TB is compressed and packed by the packing machine 7 (packing process).
- the cigarette filter is manufactured using tow band TB as a material.
- filter rods are manufactured as intermediates. That is, the tow band TB is opened and a plasticizer such as triacetin is added.
- the tow band TB is formed into a cylindrical shape conforming to the size (diameter and circumferential length) of the target cigarette using a plug winding machine, and the paper roll is wound around the filter rod.
- the filter rod manufactured in this manner is cut into a predetermined length according to the target cigarette. Thereby, a plurality of cigarette filters are manufactured from one filter rod.
- the toe band TB according to the present embodiment is suitable as a material of a cigarette filter to be attached to a thin cigarette such as a so-called slim type or super slim type.
- the cigarette filter has, for example, a circumferential length of 14 mm or more and 18 mm or less (preferably 14 to 17 mm, more preferably 14 to 15 mm or less).
- the spinning machine 4 includes a plurality of spinning cylinders 11 and a plurality of spinnerets 12 respectively corresponding to the spinning cylinders 11.
- the spinning cylinder 11 is a cylinder elongated in the vertical direction, and the spinneret 12 is provided at the upper end of the spinning cylinder 11.
- the spinneret 12 has a plurality of spinning holes 10 (see FIG. 2).
- the stock spinning solution is fed to a plurality of spinnerets 12 by a spinning pump 13.
- the stock spinning solution is discharged downward into the spinning cylinder 11 from each of the plurality of spinning holes of the spinneret 12, and a plurality of filaments F are formed by a dry spinning method.
- the spacing between the plurality of filaments F shrinks toward the bottom, whereby one yarn Y is formed.
- the yarn Y is discharged downward from the bottom of the corresponding spinning cylinder 11.
- the plurality of yarns Y are discharged from each of the plurality of spinning cylinders 11.
- Each yarn Y is applied with an oil emulsion containing a fibrous oil and water from an oiling device 14, passes around a godet roller 15, and is sent to a crimper 5.
- the plurality of yarns Y are combined with one another in the process of traveling from the godet roller 15 to the crimping machine 5, whereby a tow band TB is formed.
- the crimper 5 is, for example, a known stuffing box type.
- the toe band TB is fed into the crimper box while being compressed by the pushing roll. Thereby, the crimp of a waveform is given to the toe band TB.
- the crimped tow band TB (tow band in a narrow sense) is sent from the crimper 5 to the dryer 6. In the dryer 6, residual solvent and moisture are removed from the toe band TB.
- the process of forming filaments of cellulose acetate by the dry spinning method will be described.
- the spinning solution travels downward in the spinning cylinder 11 from when it is discharged from a certain spinning hole until it is discharged from the spinning cylinder 11.
- the dope is in the liquid phase.
- the solvent evaporates from the dope to form a filament, and the dope changes from the liquid phase to the solid phase.
- the solvent evaporates from the dope surface immediately after the start of traveling.
- the cross-sectional shape of the filament is characterized by the relationship between the evaporation rate, which is the rate at which the solvent evaporates from the dope surface, and the diffusion rate, which is the rate at which the solvent diffuses from the dope center to the surface.
- the evaporation rate is (1) solvent retention of cellulose acetate, (2) vapor pressure of solvent at atmospheric temperature, (3) degree of saturation of atmospheric gas by solvent vapor at each running point, (4) discharge of spinning solution It depends on factors such as speed and (5) evaporation surface area.
- the spreading rate follows Fick's second law.
- the diffusion from the center of the dope does not catch up with the evaporation on the surface of the dope, and the surface layer of the dope solidifies to form a skin.
- the cross-sectional circumference of the filament is determined to some extent.
- the solvent in the center of the dope diffuses through the skin and evaporates. This reduces the skin internal volume (i.e., the cross-sectional area of the filament) after skin formation and causes the skin to deform radially.
- the cross section of the filament exhibits a shape that is deformed from the shape of the spinning holes.
- the present inventors found out as follows. That is, when the diameter of the spinning holes is small, at the stage of formation of the skin, most of the solvent in the center of the dope diffuses and evaporates in the skin. Therefore, the filament cross-sectional shape does not greatly change from the shape of the spinning holes. For example, if the spinneret hole is circular, the cross section of the filament becomes substantially circular and its deformability is small. If the cross-sectional profile is small, it will be difficult to ensure filtration performance. In the past, the filtration performance has been secured by adopting an irregular shape for the spinning holes and adopting an irregular shape such as Y-type or H-type for the filament cross section.
- the factors (1) to (4) are substantially determined by the process. That is, (1) depends on the solvent used, (2) the atmosphere temperature depends on the drying temperature in the process, (3) is determined by the dry air volume, and (4) is determined by the production capacity such as spinning speed.
- the factor (5) when the bore diameter of the spinning hole is large, the cross section of the filament also becomes large and the evaporation surface area becomes large. When the evaporation surface area is large, the evaporation rate is high and the irregular shape of the cross section of the filament becomes strong. In addition, when the diameter of the spinning holes is large, the volume of the solvent trapped in the skin is also large. Also from this point, the irregular shape of the filament cross section becomes strong.
- the diameter of the spinning holes is kept within a specific range and the shape of the spinning holes is made circular, it is possible to control the irregular shape of the cross section of the filament and to secure a certain filtration performance. That is, without using the Y-shaped or H-shaped deformed cross section which is preferable when the diameter of the spinning hole is small, if the spinning hole having a circular diameter with a specified range of diameter is used, the appropriate profile in the cross section of the filament is obtained.
- the air flow resistance is appropriately controlled by the filament which can be expressed and has a specific FD having such a heteromorphism.
- FIG. 2 is a bottom view of the spinneret 12 according to the embodiment.
- the plurality of spinning holes 10 open at the bottom surface 12 a of the spinneret 12 facing the inside of the spinning cylinder 11.
- the bottom surface 12a may be circular, and the plurality of spinning holes 10 may be annularly arranged on the bottom surface 12a, but the shape of the bottom surface 12a and the arrangement of the spinning holes 10 can be changed as appropriate.
- the spinning holes 10 are circular and have a diameter of 50 ⁇ m to 100 ⁇ m. More preferably, it is 50 micrometers or more and 90 micrometers or less.
- FIG. 3 is a view showing a cross section of the filament F according to the embodiment.
- the cross section is obtained by cutting the filament F perpendicularly to the filament longitudinal direction.
- the FD of this filament F is 5.0 deniers or more and 10 deniers or less. More preferably, it is 5.5 deniers or more and 9.0 deniers or less.
- the FD of the tow band TB can be kept within such a numerical range.
- the heterogeneity of the cross-sectional shape of the filament F discharged therefrom is controlled to an appropriate range.
- the cross-sectional shape of the filament F is less round than the Y-shaped or H-shaped non-circular shape, and the heteromorphism is suppressed, and the shape approximates a circle.
- FIG. 4 is an explanatory view of an index for evaluating the heterogeneity of the filament cross section.
- Fig.4 (a) is an example of the cross section of the filament F which concerns on embodiment
- FIG.4 (b) is a comparative example, Y-type filament formed using the spinneret which has a triangular or Y-shaped spinneret. It is an example of the cross section of Fy.
- the index is, for example, “Ferre area” or “ratio S / L”.
- “Ferre area” is the ratio (S / SVP) of the area S to the area SVP, where S is the cross-sectional area of the filament F and SVP is the area of the virtual parallelogram VP circumscribing the cross section.
- S is the cross-sectional area of the filament F
- SVP is the area of the virtual parallelogram VP circumscribing the cross section.
- one of the two opposite sides is two parallel lines circumscribing the cross section, and the distance between the lines is the maximum Feret diameter.
- the other is two parallel lines circumscribing the cross section and the distance between the lines is the minimum Feret diameter. Therefore, when the cross section of the filament F is taken at an arbitrary point and the Feret area of the cross section is determined, the Feret area has a value independent of the posture around the normal to the cross section. If the cross section is a true circle, the Feret area is 0.785 [-], and if it is a triangle, the Feret area is 0.5 [
- the cross section of the filament F is minute.
- the setting of the virtual parallelogram VP circumscribing the filament cross section by processing the electronic data of the image taken through the microscope using known image processing techniques or by manual calculation based on the taken image, The measurement of the cross-sectional area S, the area SVP and the cross-sectional circumferential length L can be performed.
- the area excluding the inscribed circle ICy in the cross section is a plurality of places (3 places) on the circumference of the inscribed circle ICy. It is remarkable that it protrudes outward from and the said several places are separated to the circumferential direction.
- the virtual parallelogram VPy must be set to also surround the area. Therefore, the virtual parallelogram VPy is separated from the inscribed circle ICy in the radial direction, and becomes very large compared to the size of the inscribed circle ICy. The area occupies only a part of the space obtained by removing the inscribed circle ICy from the virtual parallelogram VPy.
- the Feret area has a small value.
- the Feret area is less than 0.5 because the Y shape is a contraction of the spinning hole triangle.
- the cross-sectional circumferential length L is larger than the cross-sectional area S, and the ratio S / L is also a small value.
- the filament F which concerns on this embodiment it forms using a circular spinning hole, and the unevenness
- the area of the cross section of the filament F excluding the inscribed circle IC is formed over substantially the entire circumference.
- the amount of protrusion from the inscribed circle IC outward does not significantly change in the circumferential direction of the inscribed circle IC. Therefore, the virtual parallelogram VP is closer to the inscribed circle IC in the radial direction.
- the Ferre area has a relatively large value because the heteromorphism of the cross-sectional shape is suppressed. Further, the unevenness at the outer edge of the cross section is small, and the ratio S / L is a large value.
- the FD of the tow band TB is 5.0 denier or more, which is larger than that of a general one.
- FD is increased, air flow resistance can be suppressed when the tow band TB is used as a cigarette filter.
- the round spinning holes 10 are used, and the Feret area of the filament F is 0.5 or more and 0.9 or less.
- the ratio S / L is 5 or more and 9 or less. Since the irregular shape of the filament cross section is suppressed, when this tow band TB is used as a cigarette filter, the air flow resistance can be suppressed even if the TD is large.
- the heteromorphism appears notably. If the FD of the tow band TB becomes too large, it is necessary to reduce the number of filaments constituting the tow band TB in order to adjust the TD of the tow band TB.
- the diameter of the spinning holes 10 is set to 100 ⁇ m or less, and the FD of the tow band TB is set to 10 deniers or less.
- the diameter of the spinning holes 10 is more preferably 50 ⁇ m or more and 90 ⁇ m or less, and the FD of the tow band TB is more preferably 15,000 deniers or more and 22,000 deniers or less.
- the Feret area can be set to 0.6 or more and 0.8 or less.
- the ratio S / L can be 5.5 or more and 8.0 or less.
- the present invention it is possible to suppress an increase in air flow resistance by keeping the FD at a certain size to suppress the profile. Furthermore, in the present invention, even if the amount of packing of the filter is high, the degree of increase in air flow resistance is low. For this reason, the fluctuation
- the TD of the toe band TB can be maintained high.
- the TD of the tow band TB can be made 14,000 denier to 22,000 denier, preferably 15,000 denier to 21,000 denier.
- ventilation resistance can be suppressed when used as a cigarette filter.
- the TD of the tow band TB is maintained high, the volume of the tow T fed to the crimper 5 per unit time also increases.
- the tow T can be stably supplied into the crimper box and the tow T can be easily crimped. In this way, in the present invention, it is possible to suppress the fluctuation of the ventilation resistance due to the fluctuation of the number of crimps of the tow band TB.
- the stuffing weight fluctuates by forming the toe band TB such that the fere area and / or the ratio S / L satisfy the above numerical range so that FD satisfies the above numerical range. It is possible to well suppress the fluctuation of the air flow resistance associated with the
- the variation of the ventilation resistance of the cigarette filter (plug) using the tow band TB according to the present embodiment is 4.0%, preferably 3.8, more preferably 3.5. More preferably, it can be 3.2% or less.
- this cigarette filter can be suitably adopted as a filter of a recent "slim type” and “super slim type” cigarette, or a filter in which a capsule is embedded.
- the pencil-like filament sample was produced from the toe band which concerns on an Example or a comparative example. That is, a fiber bundle was partially extracted from the tow band, and the fiber bundle was wrapped with paraffin so that the fiber bundle was located at a portion corresponding to a pencil core.
- the filament sample thus prepared was sliced with a microtome to a thickness of 1 ⁇ m to 10 ⁇ m to obtain a sample section. The sample section was observed with an optical microscope ("BX-51" manufactured by Olympus Corporation), and the image obtained by the observation was taken into an image processing apparatus.
- the image processing apparatus was allowed to set a virtual parallelogram VP circumscribing one filament cross section included in the image, and to measure the cross-sectional area of the filament and the area of the virtual parallelogram VP.
- the Feret area was calculated by dividing the cross sectional area of the filament by the area of the virtual parallelogram.
- Filter rod samples were produced from tow bands according to the examples or comparative examples. That is, a filter rod having a predetermined length and a predetermined packing amount (net tow weight) by focusing the tow band to a predetermined diameter using an existing manufacturing apparatus and fixing the tow band with a wrapping paper using a filter winding machine A sample was made. Air at a temperature of 22 ⁇ 1 ° C. and a humidity of 60 ⁇ 10% was passed through the filter rod sample at a flow rate of 17.5 cc / sec, and the pressure difference [mm WG] (millimeter water gauge) at that time was measured. In all of the examples and the comparative examples, the filter rod sample does not have a through hole penetrating the paper roll.
- mm WG millimeter water gauge
- Vententilation resistance fluctuation value A total of 300 filter rod samples are sampled at intervals of one in fifteen. The fluctuation value was displayed as a percentage from the measured values of the ventilation resistance of each 300 lines.
- the filter hardness was measured using a hardness tester ("QTM7" manufactured by Filtrona) for a filter rod sample molded to have a plug length of 120 mm, a circumference of 16.70 mm, and an air flow resistance of 350 mm WG. . A load of 300 g was applied vertically to the side of the filter rod sample when measuring the hardness of the filter. The filter hardness was calculated by the following equation.
- Filter hardness [%] d / d0 ⁇ 100 d is the diameter in the load direction of the filter rod sample after deformation due to load, and d0 is the diameter of the filter rod sample before deformation. If there is no deformation at all, the hardness is 100%, and the closer to 100% the hardness, the harder it is. (Examples 1 and 2)
- the tow band according to Example 1 was manufactured as follows. That is, cellulose diacetate having an average acetylation degree of 55.2% was dissolved in acetone to prepare a spinning stock solution having a concentration of about 25% by mass. The stock spinning solution at a temperature of 50 to 60 ° C. was supplied to the spinneret.
- Each spinning hole is a circle with a diameter of 71 ⁇ m.
- the stock spinning solution was discharged from the spinneret into the spinning cylinder to form a filament of FD: 8.6 denier.
- the filament was subjected to heated air at 120-150 ° C. to evaporate acetone.
- An oil emulsion was applied to the bundle-like assembly (yarn) discharged from the spinning cylinder, and this was wound up with a godet roller.
- the yarns were combined to form a tow band of TD: 21,000 denier.
- the tow band was crimped and the tow band was dried in a dryer.
- a tow band according to Example 2 was manufactured in the same manner as Example 1 except that a filament of FD: 6.0 denier was formed using circular spinning holes with a diameter of 59 ⁇ m.
- the tow band according to Comparative Example 1 was manufactured in the same manner as Example 1 except that a filament of FD: 2.0 denier was formed using triangular spinning holes of about 45 ⁇ m on a side.
- the tow band according to Comparative Example 2 was manufactured in the same manner as Example 1 except that a filament of FD: 3.0 denier was formed using triangular spinning holes of about 55 ⁇ m on one side.
- the tow band according to Comparative Example 3 was manufactured in the same manner as Example 1 except that a filament of FD: 6.0 denier was formed using triangular spinning holes of about 80 ⁇ m on a side.
- the tow band according to Comparative Example 4 was produced in the same manner as Example 1 except that filaments of FD: 7.0 denier were formed using triangular spinning holes of 85 ⁇ m on a side.
- the tow band according to Comparative Example 5 was manufactured in the same manner as Example 1 except that filaments having a diameter of FD of 8.6 denier were formed using triangular spinning holes of about 95 ⁇ m per side.
- the tow band according to Comparative Example 6 was manufactured in the same manner as Comparative Example 3 except that the TD was 17,000.
- the tow band according to Comparative Example 7 was manufactured in the same manner as Example 1 except that a filament of FD: 8.0 denier was formed using triangular spinning holes of about 95 ⁇ m per side, and the TD was 15,000.
- filter rod samples having a plug length of 120 mm, a circumference of 16.70 mm, and a tow stuffing weight of 0.35 g / rod were produced.
- the filter rod sample was conditioned by storing it in an air-conditioned room with a temperature of 20 ° C. and a humidity of 65% for 24 hours.
- the air flow resistance and the fluctuation value of the obtained sample were measured by the above-mentioned measuring method. Moreover, the filter hardness was measured by the said measuring method about the sample which concerns on Example 1 and Comparative Example 7.
- FIG. Table 1 shows the measurement results.
- Example 1 (8.6R21000) and Comparative Example 5 (8.6Y21000)
- TD 21,000 denier
- FD FD is increased to 8.6 denier
- the plug is The air flow resistance that can be achieved with a length of 120 mm and a circumference of 16.70 mm is about 430 mm WG.
- the present invention is useful for use in cellulose acetate tow bands for cigarette filters.
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- Engineering & Computer Science (AREA)
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- Artificial Filaments (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
Description
実施例又は比較例に係るトウバンドから鉛筆状のフィラメントサンプルを作製した。すなわち、トウバンドから繊維束を一部抜き取り、繊維束が鉛筆芯に相当する部位に位置するようにしてパラフィンで繊維束を包んだ。このように作製されたフィラメントサンプルをミクロトームで厚さ1μm~10μmにスライスしてサンプル切片を得た。サンプル切片を光学顕微鏡(オリンパス株式会社(Olympus Corporation)製『BX-51』)で観察し、観察で得た画像を画像処理装置に取り込んだ。画像処理装置に、当該画像に含まれる1つのフィラメント断面に外接する仮想平行四辺形VPの設定、並びにフィラメントの断面積及び仮想平行四辺形VPの面積の測定を行わせた。フェレエリアを、フィラメントの断面積を仮想平行四辺形の面積で除算することによって算出した。
上記サンプル切片を上記光学顕微鏡で観察し、観察で得た画像を画像処理装置に取り込み、画像処理装置に、当該画像に含まれる1つのフィラメント断面について、断面積及び周囲長の測定を行わせた。比S/Lを、断面積を周囲長で除算することによって算出した。
実施例又は比較例に係るトウバンドからフィルターロッドサンプルを作製した。すなわち、既存の製造装置を用いてトウバンドを所定の直径に集束し、フィルター巻上げ機を用いてトウバンドを巻紙で固定することで、所定長さ及び所定詰込み量(正味トウ重量)を有するフィルターロッドサンプルを作製した。温度22±1℃、湿度60±10%の空気を毎秒17.5ccの流量でフィルターロッドサンプルを通過させ、そのときのフィルター両端の圧力差[mmWG](ミリメートルウォーターゲージ)を測定した。なお、実施例及び比較例の全てにおいて、フィルターロッドサンプルは巻紙を貫通する貫通孔を有していない。
フィルターロッドサンプルを15本に1本の間隔で計300本サンプリングする。300本それぞれの通気抵抗の測定値から変動値をパーセント表示した。
プラグ長さ:120mm、円周:16.70mm、通気抵抗:350mmWGとなるように成型されたフィルターロッドサンプルについて、硬度計(フィルトローナ社(Filtrona)製『QTM7』)を用いてフィルター硬度を測定した。フィルターの硬度の測定に際し、フィルターロッドサンプルの側面に垂直に300gの荷重を掛けた。フィルター硬度は、次式より算出された。
dは、荷重による変形後におけるフィルターロッドサンプルの荷重方向の直径、d0は、変形前におけるフィルターロッドサンプルの直径である。全く変形がなければ硬度は100%であり、硬度が100%に近いほど硬いことを意味する。
(実施例1~2)
実施例1に係るトウバンドは次のように製造された。すなわち、平均酢化度55.2%のセルロースジアセテートをアセトンに溶解し、濃度約25質量%の紡糸原液を調製した。温度50~60℃の紡糸原液を紡糸口金に供給した。各紡糸孔は直径71μmの円形である。紡糸原液を各紡糸口金より紡糸筒内に吐出し、FD:8.6デニールのフィラメントを形成した。紡糸筒内では、アセトンを蒸発させるため、フィラメントに120~150℃の加熱空気をあてた。紡糸筒より排出された束状の集合体(ヤーン)にオイルエマルジョンを付与し、これをゴデットローラで巻き取った。ヤーンを合一してTD:21,000デニールのトウバンドを形成した。このトウバンドに捲縮を付与し、乾燥機でトウバンドを乾燥させた。実施例2に係るトウバンドは、直径59μmの円形紡糸孔を用いてFD:6.0デニールのフィラメントを形成した以外は、実施例1と同様に製造された。
(比較例1~7)
比較例1に係るトウバンドは、1辺45μm程度の三角形紡糸孔を用いてFD:2.0デニールのフィラメントを形成した以外は、実施例1と同様に製造された。比較例2に係るトウバンドは、1辺55μm程度の三角形紡糸孔を用いてFD:3.0デニールのフィラメントを形成した以外は、実施例1と同様に製造された。比較例3に係るトウバンドは、1辺80μm程度の三角形紡糸孔を用いてFD:6.0デニールのフィラメントを形成した以外は、実施例1と同様に製造された。比較例4に係るトウバンドは、1辺85μmの三角形紡糸孔を用いてFD:7.0デニールのフィラメントを形成した以外は、実施例1と同様に製造された。比較例5に係るトウバンドは、1辺95μm程度の三角形紡糸孔を用いてFD:8.6デニールのフィラメントを形成した以外は、実施例1と同様に製造された。比較例6に係るトウバンドは、TDが17,000である以外は、比較例3と同様に製造された。比較例7に係るトウバンドは、1辺95μm程度の三角形紡糸孔を用いてFD:8.0デニールのフィラメントを形成し、TDが15000である以外は、実施例1と同様に製造された。
実施例1~2及び比較例1~5に係るトウバンドから、トウ詰込重量を0.33g/rodとするフィルターロッドサンプルも作製した。比較例6に係るトウバンドから、トウ詰込重量を0.33、0.28g/rodとするフィルターロッドサンプルも作製した。比較例7に係るトウバンドから、トウ詰込重量を0.33、0.28、0.24g/rodとするフィルターロッドサンプルも作製した。得られたサンプルについて通気抵抗を上記測定方法で測定した。表2はその測定結果を示す。
TB トウバンド
1 トウバンド製造装置
4 紡糸機
5 捲縮機
10 紡糸孔
11 紡糸筒
12 紡糸口金
Claims (11)
- 複数の紡糸孔それぞれより吐出される複数本のフィラメントを束状に合一して捲縮してなる、シガレットフィルター用のセルロースアセテートのトウバンドであって、
フィラメントデニールが5.0デニール以上であり、
前記フィラメントのフェレエリアが0.5以上である、シガレットフィルター用のセルロースアセテートのトウバンド。 - 前記フィラメントデニールが10デニール以下である、請求項1に記載のシガレットフィルター用のセルロースアセテートのトウバンド。
- 前記フェレエリアが0.9以下である、請求項1又は2に記載のシガレットフィルター用のセルロースアセテートのトウバンド。
- トータルデニールが14,000デニール以上である、請求項1乃至3のいずれか1項に記載のシガレットフィルター用のセルロースアセテートのトウバンド。
- 前記トータルデニールが22,000デニール以下である、請求項4に記載のシガレットフィルター用のセルロースアセテートのトウバンド。
- 複数の紡糸孔それぞれより吐出される複数本のフィラメントを束状に合一して捲縮してなる、シガレットフィルター用のセルロースアセテートのトウバンドであって、
フィラメントデニールが、5.0デニール以上であり、
前記フィラメントの断面の面積をS、当該断面の周長をLとした場合における前記面積及び前記周長の比S/Lが5以上である、シガレットフィルター用のセルロースアセテートのトウバンド。 - 前記フィラメントデニールが10デニール以下であり、前記比S/Lが9以下である、請求項6に記載のシガレットフィルター用のセルロースアセテートのトウバンド。
- 請求項1乃至7のいずれか1項に記載のトウバンドから製造され、14~18mmの円周長を有する、シガレットフィルター。
- 複数の紡糸孔それぞれより吐出される複数本のフィラメントを束状に合一して捲縮してなる、シガレットフィルター用のセルロースアセテートのトウバンドを製造する装置であって、
前記複数の紡糸孔を有する紡糸口金を備え、前記紡糸孔が円形であり、その直径が50μm以上である、シガレットフィルター用のセルロースアセテートのトウバンド製造装置。 - 前記紡糸孔が円形であり、その直径が100μm以下である、請求項9に記載のシガレットフィルター用のセルロースアセテートのトウバンド製造装置。
- 複数の紡糸孔それぞれより紡糸原液を吐出して複数本のフィラメントを形成する工程と、
前記複数本のフィラメントを束状に合一して捲縮してトウバンドを形成する工程と、を備え、
前記紡糸孔が円形であり、その直径が50μm以上である、シガレットフィルター用のセルロースアセテートのトウバンド製造方法。
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PCT/JP2014/001449 WO2015136573A1 (ja) | 2014-03-13 | 2014-03-13 | シガレットフィルター用のセルロースアセテートのトウバンド、シガレットフィルター、トウバンドの製造装置、及びトウバンドの製造方法 |
JP2014538949A JP5841671B1 (ja) | 2014-03-13 | 2014-03-13 | シガレットフィルター用のセルロースアセテートのトウバンド、シガレットフィルター、トウバンドの製造装置、及びトウバンドの製造方法 |
PL14885125T PL3117724T3 (pl) | 2014-03-13 | 2014-03-13 | Acetylocelulozowa wstęga włókninowa do zastosowania w filtrach papierosowych oraz filtr papierosowy |
KR1020167000524A KR101677002B1 (ko) | 2014-03-13 | 2014-03-13 | 시가렛 필터용의 셀룰로오스 아세테이트의 토우 밴드, 시가렛 필터, 토우 밴드의 제조 장치, 및 토우 밴드의 제조 방법 |
RU2016130888A RU2609674C1 (ru) | 2014-03-13 | 2014-03-13 | Ацетатцеллюлозный жгут для использования в сигаретном фильтре, сигаретный фильтр, устройство для изготовления жгута и способ изготовления жгута |
LTEP14885125.6T LT3117724T (lt) | 2014-03-13 | 2014-03-13 | Celiuliozės acetato pakulų juosta, skirta panaudoti cigarečių filtruose ir cigaretės filtras |
EP14885125.6A EP3117724B1 (en) | 2014-03-13 | 2014-03-13 | Cellulose acetate tow band for use in cigarette filters and cigarette filter |
CN201480077075.8A CN106102486B (zh) | 2014-03-13 | 2014-03-13 | 香烟过滤嘴用的乙酸纤维素的丝束带、香烟过滤嘴、丝束带的制造装置、以及丝束带的制造方法 |
US15/120,618 US20170006912A1 (en) | 2014-03-13 | 2014-03-13 | Cellulose acetate tow band for use in cigarette filter, cigarette filter, apparatus for manufacturing tow band, and method of manufacturing tow band |
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- 2014-03-13 WO PCT/JP2014/001449 patent/WO2015136573A1/ja active Application Filing
- 2014-03-13 CN CN201480077075.8A patent/CN106102486B/zh active Active
- 2014-03-13 LT LTEP14885125.6T patent/LT3117724T/lt unknown
- 2014-03-13 KR KR1020167000524A patent/KR101677002B1/ko active IP Right Grant
- 2014-03-13 US US15/120,618 patent/US20170006912A1/en not_active Abandoned
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Cited By (11)
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KR20190040885A (ko) | 2017-10-11 | 2019-04-19 | 주식회사 다이셀 | 전자 담배 팁용의 토우 밴드 및 전자 담배용 팁 |
JP2019070217A (ja) * | 2017-10-11 | 2019-05-09 | 株式会社ダイセル | 電子タバコチップ用のトウバンド及び電子タバコ用チップ |
WO2020013248A1 (ja) * | 2018-07-12 | 2020-01-16 | 株式会社ダイセル | セルロースアセテート繊維、セルロースアセテートトウバンド、及びセルロースアセテートトウバンドの製造方法 |
JP2020007686A (ja) * | 2018-07-12 | 2020-01-16 | 株式会社ダイセル | セルロースアセテート繊維、セルロースアセテートトウバンド、及びセルロースアセテートトウバンドの製造方法 |
JP7217099B2 (ja) | 2018-07-12 | 2023-02-02 | 株式会社ダイセル | セルロースアセテート繊維、セルロースアセテートトウバンド、及びセルロースアセテートトウバンドの製造方法 |
WO2020012633A1 (ja) | 2018-07-13 | 2020-01-16 | 株式会社ダイセル | 電子タバコチップ用のトウバンド、電子タバコ用チップ、及び電子タバコチップ用のトウバンドの製造方法 |
KR20210029155A (ko) | 2018-07-13 | 2021-03-15 | 주식회사 다이셀 | 전자 담배 팁용의 토우 밴드, 전자 담배용 팁, 및 전자 담배 팁용의 토우 밴드의 제조 방법 |
JP2021514673A (ja) * | 2018-11-23 | 2021-06-17 | ケーティー・アンド・ジー・コーポレーション | エアロゾル生成装置用のシガレット及びそのシガレットを使用するエアロゾル生成装置 |
JP7144115B2 (ja) | 2018-11-23 | 2022-09-29 | ケーティー アンド ジー コーポレイション | エアロゾル生成装置用のシガレット及びそのシガレットを使用するエアロゾル生成装置 |
JP2023511507A (ja) * | 2019-12-19 | 2023-03-20 | セルディア インターナショナル ゲーエムベーハー | 喫煙製品またはhnb製品で使用するためのマウスピース用のフィルター材料および/またはフィラー材料、そのようなフィルター材料および/またはフィラー材料を含むマウスピースおよびシガレットフィルター、ならびにそのようなフィルター材料および/またはフィラー材料を製造するための方法 |
JP7407944B2 (ja) | 2019-12-19 | 2024-01-04 | セルディア インターナショナル ゲーエムベーハー | 喫煙製品またはhnb製品で使用するためのマウスピース用のフィルター材料および/またはフィラー材料、そのようなフィルター材料および/またはフィラー材料を含むマウスピースおよびシガレットフィルター、ならびにそのようなフィルター材料および/またはフィラー材料を製造するための方法 |
Also Published As
Publication number | Publication date |
---|---|
LT3117724T (lt) | 2019-06-10 |
CN106102486A (zh) | 2016-11-09 |
JP5841671B1 (ja) | 2016-01-13 |
EP3117724A4 (en) | 2018-01-17 |
KR20160007689A (ko) | 2016-01-20 |
JPWO2015136573A1 (ja) | 2017-04-06 |
EP3117724B1 (en) | 2019-05-08 |
US20170006912A1 (en) | 2017-01-12 |
KR101677002B1 (ko) | 2016-11-16 |
PL3117724T3 (pl) | 2019-10-31 |
RU2609674C1 (ru) | 2017-02-02 |
CN106102486B (zh) | 2018-05-22 |
EP3117724A1 (en) | 2017-01-18 |
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