Classifications

• • 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
  • D01D7/00—Collecting the newly-spun products
• • 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
  • D01D5/08—Melt spinning methods
  • D01D5/096—Humidity control, or oiling, of filaments, threads or the like, leaving the 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
  • D01D5/22—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
  • 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
  • D01F2/24—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives
  • D01F2/28—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives from organic cellulose esters or ethers, e.g. cellulose acetate

Definitions

• the present invention relates to a manufacturing method and a manufacturing apparatus for manufacturing a tow band to which sufficient crimping is imparted and excellent in spread uniformity.
• tow bands In general, in the production of tow bands, first, filaments are spun from a large number of spinning holes of a spinneret, and the resulting filament has a width of 3.0 to 3.0 mm from the spinneret to the feed roller. : 15. It is arranged in a fiber assembly of about Omm. Such a fiber assembly is called tow yarn. Then, after forming a plurality of tow yarns into a band shape, a tow band can be manufactured by crimping the obtained band-like fiber bundle. The tow band produced in this way is used for, for example, a tow for a tobacco filter.
• an oil agent is applied to the tow yarn and tow band.
• the tow yarn's converging property, smoothness, antistatic property, etc. are improved, and the production process is stabilized in the spinning process. be able to.
• the application of oil to the tow yarn or tow band improves the product quality when, for example, opening the tow band and covering it with a cigarette filter, etc., and also prevents the occurrence of troubles such as fuzzing. It is extremely important.
• Patent Document 1 JP 2002-155422 A discloses a method for producing a synthetic fiber tow.
• an oil agent is applied by using a oiling roller to the spun yarn spun by the spinneret. After that, it is stretched and heat-treated by combining with other yarns with a focusing guide. Furthermore, immediately after the heat treatment is performed, the finishing oil is sprayed and applied to the synthetic fiber tow, and then crimp is applied to the synthetic fiber tow.
• the oil agent can be uniformly and efficiently applied to the drawn tow by applying the oil agent by spraying before applying crimp to the synthetic fiber tow as described above.
• Patent Document 1 JP 2002-155422 A
• the tow band is formed from the acetate tow yarns.
• the position of the yarn is displaced, resulting in uneven toe band formation, and there is a problem that the toe band spread uniformity is deteriorated.
• the present invention has been made in view of the above problems, and an object of the present invention is to produce a tow band by concentrating a plurality of acetate tow yarns.
• a uniform tow band to improve the spread uniformity of the tow band, and tow bands that can stably impart sufficient crimp to the formed tow band and have excellent spread uniformity and processing stability. It is an object of the present invention to provide a tow band manufacturing method and manufacturing apparatus.
• acetate fiber is generally a hydrophilic material, and physical properties such as strength and Young's modulus vary greatly depending on its moisture content (water content).
• the acetate tow yarn is simply given an oil agent or an emulsion oil dispersed in water to the toe band. The moisture content of the fiber until it is shrunk It was not done to keep the rate right.
• the present inventors set the moisture content of the fiber in accordance with each treatment until the acetate tow yarn is produced and the crimp is applied to the force tow band. If properly controlled, it can prevent misalignment of the acetate tow yarn to form a uniform tow band, and can stably impart sufficient crimp to the tow band, with excellent spread uniformity and cache stability.
• the present invention has been completed by finding that a tow band having the above can be produced.
• the tow band manufacturing method of the present invention produces acetate tow yarns by bundling a plurality of acetate filaments, and bundling a plurality of the acetate tow yarns.
• the moisture is applied to the tow yarn after preparation of the above tow yarn, and the moisture content is adjusted to 5% or more and 20% or less.
• Forming a tow band by concentrating a plurality of acetate tow yarns into a belt shape, applying moisture to the tow band, and applying crimp to the tow band to which the moisture has been applied. It is the main feature.
• acetate has a degree of acetylation of 45. /. More than 59.5. /. Refers to diacetate that is less than.
• the moisture content of the tow band to which moisture has been imparted is 20% or more and 50% or less. Is preferred.
• the present invention when forming a tow band from acetate tow yarn, in order to prevent swinging of the acetate tow yarn and to prevent cutting of the tow yarn, to form a uniform tow band, Continuously bundling a plurality of acetate tow yarns to form a tow band; sliding the acetate tow yarn traveling in one direction on the sliding surface of a guide having a required sliding surface; And the tension T of the tow yarn in the vicinity of the upstream side of the guide T
• the tension difference (T2 ⁇ T1) between 1 and the tow yarn tension T2 in the vicinity of the downstream side of the guide is preferably adjusted to 10 Ogf or more and less than 200 gf.
• the tow band manufacturing apparatus of the present invention produces a tow band by bundling a plurality of acetate filaments to produce an acetate tow yarn, and bundling a plurality of the same acetate tow yarn.
• a first moisture imparting device that imparts moisture so that at least the moisture content of the acetate tow yarn is 5% to 20%, and a plurality of acetate tow yarns imparted with moisture
• the crimping device is the most important feature.
• the second moisture applying device in order to stably apply moisture to the tow band, includes a moisture application guide that comes into contact with the tow band. It is preferable that a pair of flange portions for regulating the width direction and a slit opened between the same pair of flange portions are provided, and liquid is applied to the toe band through the slit.
• acetate tow yarns are produced by bundling acetate filaments, and then water is given to the tow yarns to increase the moisture content of the tow yarns.
• a tow band is formed by concentrating a plurality of acetate tow yarns to which moisture is applied at / 0 to 20%.
• the running tension of the tow yarn is increased to prevent the tow yarn from swinging, and the acetate filament in the tow yarn is prevented from being cut.
• sufficient crimps can be stably imparted to the tow band by imparting a certain amount of moisture to the formed tow band and then applying crimps.
• the present invention by performing predetermined water application to the tow yarn and water application to the tow band, a process from the production of the tow yarn to the formation of the tow band, and Because moisture content suitable for each treatment of crimping to band can be secured Thus, a tow band having a uniform spread state can be formed, and sufficient crimping can be stably performed. Therefore, the tow band produced by the tow band producing method of the present invention is sufficiently crimped and has excellent spread uniformity and processing stability.
• a plurality of acetate tow yarns are continuously converged to form a tow band, and the acetate tow yarns traveling in one direction are formed on the sliding contact surface of a guide having a required sliding contact surface.
• the tow band is made by sliding and adjusting the tension difference between the tow yarn tension T1 and T2 (T2-T1) in the vicinity of the upstream side and downstream side of the guide to a tension of lOOgf or more and less than 200gf. It is possible to further prevent the tow yarn from swinging during the operation. In addition, such tension adjustment can more reliably prevent the filament and tow yarn from being cut. As a result, it is possible to obtain a tow band with even better spread uniformity.
• the tow band manufacturing apparatus of the present invention is provided with at least a first moisture applying device for applying moisture so that the moisture content of acetate tow yarn is not less than 20% and not more than 20%.
• Tow band forming means for forming a tow band by concentrating a plurality of acetate tow yarns in a band shape, a second moisture applying device for applying moisture to the tow band formed by the forming means, and a tow band to which moisture has been applied
• a crimping imparting device for imparting crimps Since the tow band manufacturing apparatus of the present invention has such a configuration, the tow band can be manufactured according to the manufacturing method of the present invention, sufficient crimping is provided, and excellent spread uniformity.
• a to-band manufacturing apparatus capable of stably manufacturing a tow band having a cache stability.
• the second moisture imparting device that imparts moisture to the tow band includes a moisture imparting guide that contacts the toe band, and the moisture imparting guide includes a pair of flange portions that regulate the width direction of the toe band, A slit opened between the pair of flange portions, and liquid is applied to the toe band through the slit so that the toe band has an appropriate moisture content. Minutes can be stably applied to the tow band.
• FIG. 1 is an explanatory view schematically showing an example of a tow band production apparatus of the present invention.
• FIG. 2 is an explanatory view schematically showing an example of a first moisture applying device.
• FIG. 1 is an explanatory view schematically showing an example of a tow band manufacturing apparatus according to the present embodiment.
• FIG. 2 is an explanatory view schematically showing an example of the first moisture applying device. 1 and 2 are schematically shown for easy understanding of the embodiment of the present invention, and the present invention is not limited to these configurations.
• a tow band manufacturing apparatus 10 produces an acetate tow yarn 2 by converging a plurality of acetate filaments spun from a spinneret 1, and this acetate tow yarn
• the moisture content of the acetate tow yarn 2 is 5. /. More than 20
• Tow band forming means for forming a tow band 5 by concentrating a plurality of acetate tow yarns 2 ′ to which moisture is applied and a plurality of acetate tow yarns 2 ′ to which moisture is applied to form a tow band 5
• the production apparatus 10 of the present embodiment includes a feed roller 4 and a guide 8 so that the tow band 5 can be smoothly formed from the plurality of acetate tow yarns 2 ′ that have been moisture-hydrated by the first moisture-imparting apparatus 3. It is installed.
• the first moisture applicator 3 is not particularly limited as long as it can provide moisture so that the moisture content of the running acetate tow yarn 2 is 5% or more and 20% or less. It is possible to improve and use this apparatus.
• the first moisture applying device used in the present embodiment for example, in a conventionally used spinning device, the acetate tow yarn 2 runs perpendicular to the horizontal plane.
• a roller-type first moisture applicator (tow yarn moisture applicator) 3 as shown can be used.
• the first moisture applicator 3 shown in FIG. 2 is provided with a bowl-shaped liquid receiver 11 that contains the liquid 13 applied to the acetate tow yarn 2 and a liquid 13 filled with the liquid receiver 11.
• This is a roller-type moisture applicator having a cylindrical roller 12 which is arranged so that the part is immersed and rotates in contact with the acetate tow yarn 2.
• the cylindrical roller 12 is applied to the surface of the acetate tow yarn 2 in order to uniformly apply moisture so that the moisture content is 5% or more and 20% or less.
• a porous roller capable of holding the liquid 13 uniformly is preferable.
• ceramic having a water absorption performance of 6 to 9% can be used as a material of such a porous roller.
• the water absorption rate of the porous roller can be measured, for example, as follows. For example, after allowing the porous roller to stand in a ventilation dryer at 110 ⁇ 5 ° C for 1 hour, it is gradually cooled in a desiccator containing a desiccant. After slow cooling, weigh the weight (g) of the porous roller. Next, the porous roller is immersed in water for 1 minute and then lifted to gently wipe the droplets on the surface of the porous roller. Immediately thereafter, Weigh the porous roller's weight j3 (g). Then, from the measured weight a of the porous roller and ⁇ (g), the water absorption rate of the porous roller is calculated by the following equation.
• an oil agent such as mineral oil is used as the liquid 13 contained in the liquid receiver 11 so that an oil agent can be applied to the acetate tow yarn 2 at the same time as applying water.
• an emulsion oil component in which the components are mixed with a surfactant and dispersed in water.
• an oil agent application device in order to apply the oil agent to the acetate tow yarn 2, an oil agent application device can be installed separately from the first water content applicator 3.
• an emulsion oil is used as the liquid 13 as described above, moisture and oil can be simultaneously applied to the acetate tow yarn 2, which is preferable in terms of workability, productivity, process control, and the like.
• the liquid (emulsion oil) contained in the liquid receiver 11 for example, the number of rotations of the cylindrical roller 12 using the first moisture applying apparatus 3 as described above.
• moisture can be stably given so that the moisture content of the acetate tow yarn 2 becomes 5% or more and 20% or less.
• the second moisture applying device 6 of the tow band production device 10 is configured so that the moisture content of the tow band 5 becomes an appropriate value (for example, the moisture content of the tow band 5 is 20% or more and 50% or less).
• water is imparted to the tow band 5, and the configuration is not particularly limited, and a known apparatus can be modified and used.
• Such a second moisture applicator has, for example, a moisture applicator guide that contacts the tow band 5 and regulates its width direction.
• the moisture application guide has a pair of flange portions that regulate the width direction of the tow band, and a slit that opens between the pair of flange portions, and supplies liquid to one end of the moisture application guide via a pipe.
• the gear pump as a means is connected. By supplying the liquid supplied from the gear pump into the moisture supply guide, moisture can be applied to the tow band through a slit opened between the flange portions.
• the moisture can be stabilized so that the tow band 5 has a predetermined moisture content.
• the second moisture applicator 6 for example, an emulsion oil agent in which an oil agent component is dispersed in water can be applied to the tow band 5 so that an oil agent can be applied to the tow band 5 at the same time.
• an oil agent applying device separately from the second moisture applying device 6.
• moisture and oil can be applied at the same time, which is preferable in terms of workability, productivity, process control, and the like.
• This second moisture applicator 6 can be installed on either the front side or the back side of the tow band 5 that travels, so that it can stably apply moisture to the toe band 5. wear.
• the present embodiment is not limited to this, and for example, one or two or more of the second moisture applying devices 6 can be installed on the front and back surfaces of the tow band 5, respectively.
• a plurality of acetate filaments discharged from the spinneret 1 are converged to produce an acetate tow yarn 2 having a width of about 3 mm to about 15 mm.
• the obtained acetate tow yarn 2 is given moisture by the first moisture applicator 3 so that the moisture content becomes 5% or more and 20% or less.
• a liquid (emulsion oil agent) 13 that a part of the cylindrical roller 12 applies to the acetate tow yarn 2 13. Soaked in Then, the roller 12 rotates in a direction facing the running direction of the tow yarn 2 while being in contact with the acetate tow yarn 2, whereby moisture can be imparted to the acetate tow yarn 2.
• the rotational speed of the cylindrical roller 12 or the emulsion stored in the liquid receiver 11 is used.
• Moisture is applied so that the moisture content of the acetate tow yarn 2 is 5% or more and 20% or less by adjusting the moisture ratio of the oil.
• the moisture content of the acetate tow yarn 2 is less than 5%, for example, when the tow yarn 2 comes into contact with the guide 8 or the tow band forming means 9, the friction resistance becomes very large, and the acetate tow yarn 2 And the acetate filament in the tow yarn 2 is cut.
• the moisture content of acetate tow yarn 2 exceeds 20%, the running tension of tow yarn 2 is greatly reduced. If the running tension of the tow yarn 2 decreases in this way, the tow yarn 2 swings when the tow band 5 is formed, and the convergence of the tow yarn 2 becomes uneven, and the tow band 5 can be formed uniformly. Can not. As a result, the spread uniformity of the tow band 5 to be produced is lowered.
• the moisture content of the acetate tow yarn 2 is adjusted to 5% or more and 20% or less, thereby producing acetate tow yarn. Cutting of the yarn 2 and acetate filament can be prevented.
• the running tension of the tow thread 2 can be increased, the tow thread 2 can be prevented from swinging when the tow band 5 is formed, and a uniform tow band 5 can be formed. Thereby, the spread uniformity of the tow band 5 can be improved.
• the first moisture applicator 3 only the moisture can be imparted to the acetate tow yarn 2.
• the emulsion oil agent in the liquid receiver 11.
• an oil agent can be simultaneously given to the acetate tow yarn 2 together with moisture.
• the convergence property, smoothness, antistatic property and the like of the tow yarn can be improved, and the production can be stabilized in each step.
• it is extremely important to apply such an oil agent for example, in improving the product quality when the tow band is opened and processed into a cigarette filter and the like, and the occurrence of trouble due to fluffing is prevented. .
• the acetate tow yarn 2 'to which moisture has been imparted by the first moisture imparting device 3 is continuously conveyed to the guide 8 having a required sliding contact surface through the feed port 4 and
• the running direction of the tow yarn 2 ′ is directed to the direction suitable for the formation of the tow band 5 by causing the acetate tow yarn 2 ′ running in one direction to slide on the sliding contact surface of the guide 8.
• the acetate tow yarn 2 ′ traveling in a predetermined direction is continuously converged in a band shape with a plurality of acetate tow yarns 2 made from other spinneret in the tow band forming means 9, thereby tow band 5 Form.
• the tension difference (T2-T1) between the tension T1 of the tow yarn in the vicinity of the upstream side of the guide 8 and the tension T2 of the tow yarn in the vicinity of the downstream side is greater than lOOgf. It is preferable to adjust.
• the tension difference (T2 ⁇ T1) between the vicinity of the upstream side and the vicinity of the downstream side of guide 8 is lOOg f or more, the swinging of the acetate tow thread 2 can be effectively prevented.
• a uniform tow band 5 can be formed.
• the tension difference (T2 ⁇ T1) of the tow yarn between the vicinity of the upstream side and the vicinity of the downstream side across the guide 8 is less than 200 gf.
• the second moisture imparting device 6 imparts moisture to the tow band 5 so that the moisture content of the toe band to which moisture has been imparted is 20% or more and 50% or less.
• the water content of 5 tow bands acts as a plasticizer during crimping. Therefore, when the moisture content of tow band is as low as less than 20%, it is difficult to obtain sufficient crimp as a tow band for a tobacco filter, for example, even if a tow band is subjected to a crimping force of 5%. In this case, in order to impart sufficient crimp to the tuband, it is necessary to increase the crimping processing conditions. If the crimping processing conditions are strengthened in this way, the fibers constituting the tow band This increases the amount of dust generated when processing tobacco filters that are susceptible to damage.
• the supply amount of the liquid supplied via the slit of the hydration guide, the moisture ratio in the supplied liquid, and the like are adjusted.
• the moisture ratio in the supplied liquid, and the like are adjusted.
• an oil agent can also be applied.
• the emulsion oil agent to the tow band 5 with the second moisture applying device 6, the water and the oil agent can be simultaneously applied to the toe band 5.
• the above-described application of the oil to the acetate tow yarn 2 and the application of the oil to the tuband 5 are not particularly limited. be able to.
• the final amount of oil applied to the tow band 5 is about 1.0%.
• the amount of oil applied can be controlled so that the amount of oil applied is 0.2 to 1.0%, preferably 0.3 to 0.8%.
• the application of oil to the acetate tow yarn 2 and the application of the oil to the tow band 5 are not limited to the force S performed simultaneously with the application of moisture using the emulsion oil.
• the tow band 5 ' is subjected to crimping force check using the crimp applying device 7 to the tow band 5' to which the water has been applied. Sufficient crimps can be stably applied to '.
• the tow band is manufactured using the first moisture applicator 3 and the second moisture applicator 6, whereby the moisture content of the acetate fiber is reduced to the acetate tow yarn. It can be controlled so as to be suitable for each of the process from the production of the strip to the formation of the tow band and the process of imparting crimp to the tow band.
• the filament and tow yarn are prevented from being cut, and the tow yarn is prevented from swinging to produce a uniform tow band. It is possible to improve the spread uniformity of the tow band.
• sufficient crimp is uniformly applied to the tow band. Since it can be applied stably, for example, when the tow band is subsequently processed into a cigarette filter or the like, the amount of dust generated can be reduced and stable processing can be performed.
• the tow band which is sufficiently crimped by the tow band manufacturing method of the present embodiment and which has excellent spread uniformity and cache stability can be manufactured stably. .
• the moisture content of the tow yarn was determined by measurement by the Karl Fischer method.
• the tow yarn 2 'after passing through the first moisture imparting device 3 is wound on the feed roller 4, and a total sample tow yarn is collected from the feed roller 4 using a jig.
• the yarn path is guided using a guide or the like so that the contact state of the tow yarn 2 with the first moisture applicator 3 does not change. Regulated.
• the Sampnole tow yarn collected from the feed roller 4 was quickly put in a plastic bag so that the water did not evaporate.
• the tow yarn sample was collected and weighed (Dg) in the same manner as described above.
• the tow yarn sample is then placed in a Soxhlet extraction tube and a round bottom extraction flask containing diethyl ether is attached, after which the ether keeps boiling low.
• About 1 hour was extracted by heating in an extraction bath.
• the tow yarn sample was tightly squeezed, placed in a weighing bottle, and dried for 1 hour in a vacuum steam dryer with a temperature of 85 ° C or higher and a vacuum of 70 to 76 mmHg. Thereafter, the obtained tow yarn sample was further dried for 1 hour with a draft dryer preheated to 105 ⁇ 3 ° C. After drying, the tow yarn sample was gradually cooled and weighed to determine the solid weight of the sample (Eg).
• the moisture content of the tow yarn was calculated as the moisture weight relative to the solid weight by the following formula.
• F is the titer of the Karl Fischer reagent and is a coefficient representing the volume of Karl Fischer reagent required for titration of water.
• Moisture content of tow yarn (%) (B-C) X D / E / A X 100
• the crimping device crimper
• the nip roll pressure and the flapper pressure are reduced to such an extent that the running tow band does not cut, and the crimping device is sprayed.
• the cooling water was stopped momentarily.
• the toe band to which the crimping force applied to the crimping device was applied was collected.
• the collected tow band was immediately put in a resin bag to prevent drying.
• the moisture content of the collected tow band was determined by the Karl Fischer method as in the case of tow yarn.
• the crimped tow band was pulled up with a single carrier port and mounted on a flat cardboard in about 2 to 3 layers with a constant traverse cycle. .
• the tow band loaded on 2 to 3 layers was used as a sampnore for fiber opening evaluation.
• Score 1 It is a uniform spread state as a whole. There is a significant difference in density between the spread width and the width of the portion where the density spots are less than 5%.
• Score 2 There is no significant difference in density between the tow bands after opening, and the width of the portion where the unevenness is uneven with respect to the opening width is 5% or more and less than 10%.
• Score 3 The tow band after opening has a slight density difference or no significant density difference, but the width of the portion where the density unevenness is generated is less than 10% but less than 15%.
• Rating 4 The tow band after opening is in a non-uniform opening state that does not reach rating 3.
• the crimp rate of the tow band was measured according to the method described in JIS L 1015 (1999), 8.1.2.2. In the measurement of the crimp rate, a tow band showing a crimp rate of 40% or more was evaluated as a pass.
• the crimped toe band was loaded on the enclosure for a certain period of time, it was compressed and packed to produce a sample bale.
• the prepared sample veil was left undisturbed for at least 2 weeks after packing, and then unpacked and tested on the plug.
• the Howi company's KDF-3 “KDF-3” was used for lifting for 1 hour at a lifting speed of 600 m / min, and opened in a hooded opening booth (volume: approx. 115,000 cm 3 ). The accumulated yarn weight was measured.
• acetate tow yarn 2 was first prepared under the conditions that the single fiber per nodule in the spinneret 1 was 350 filaments and the single fiber fineness was 3. Odtex.
• This first moisture applicator 3 comprises a porous ceramic roller having a diameter of 50 mm and a water absorption of 6 to 9% as a cylindrical roller 12, and the liquid receiver 11 has 95% by weight of water and an oil component. Is filled with an emulsion oil composition with a composition power of 3.8% by weight and a surfactant of 1.2% by weight. Then, the cylindrical roller 12 of the first moisture applicator 3 is brought into contact with the acetate tow yarn 2, and is opposed to the running direction of the tow yarn 2. Moisture and oil were added to the tow yarn 2 by rotating at a rotation condition of lOOrpm in the direction of rotation. At this time, the moisture content of the acetate tow yarn 2 ′ to which moisture was imparted by the first moisture imparting device 3 was 15%.
• the acetate tow yarn 2 to which moisture has been imparted by the first moisture applicator 3 is continuously conveyed to the tow band forming means 9 through the feed roller 4 and the guide 8, and in tow band forming means 9 33
• the acetate tow yarn 2 was bundled to form a tow band 5.
• the average value was 125 gf.
• the emulsion oil agent was applied to the tow band 5 formed by the tow band forming means 9 with the second moisture applying device 6 installed immediately before the crimp applying device 7.
• the second moisture applicator 6 has a ceramic moisture applicator in contact with the tow band 5.
• the moisture application guide is formed with a slit having a rectangular opening in which the running direction of the tow band is a vertical width (T) and the width direction of the tow band is a horizontal width (W).
• T of the slit formed in the moisture supply guide is 0.35 mm
• the horizontal width W is 19 mm
• the ratio between the horizontal width (W) of the slit and the width (L) between the flanges. W / L was 0.95.
• the moisture content of the toe band to which the emulsion oil agent was applied was measured with the second moisture applicator 6, the moisture content was 35%.
• Example 1 Thereafter, crimp was imparted to the tow band 5 'to which the emulsion oil agent was imparted by the crimp imparting device 7.
• the tow band produced in Example 1 was evaluated for spread uniformity, and the crimp rate and the amount of dust were measured. As a result, the spread uniformity of the tow band of Example 1 was score 1, the crimp rate of the tow band was 41.5%, and the amount of dust per hour was 0.15 g.
• Example 2 using the same production apparatus as in Example 1 above, the amount of moisture applied to the tow band by the second moisture applying device 6 was less than that in Example 1, and the emulsified oil was applied. Except for this, the tow band was manufactured under the same processing conditions as in Example 1 above. In Example 2, the moisture content of tow yarn 2 'is 15%, and the tension difference (T2 The average value of _T1) was 125 gf. On the other hand, when the moisture content of the tow band 5 ′ to which the emulsion oil agent was imparted was measured with the second moisture imparting device 6, the moisture content was 19%.
• Example 2 the spread uniformity was evaluated, and the crimp rate and the amount of dust were measured.
• the spread uniformity in the tow band of Example 2 was rated 1
• the crimp rate of the tow band was 41.2%
• the amount of yarn dust per hour was 0.40 g.
• Example 3 in the production apparatus used in Example 1 above, a ceramic moisture application guide was used as the first moisture application device instead of the roller-type moisture application device as shown in FIG.
• the ceramic moisture-imparting guide used as the first moisture-imparting device has a pair of flange portions that regulate the width direction of the tow yarn, and a slit that opens in a rectangular shape between the pair of flange portions.
• the vertical width T of the slit formed in this moisture application guide is 0.35 mm
• the horizontal width W is 4 mm
• the ratio between the horizontal width (W) of the slit and the width (L) between the flanges W / L was 0 ⁇ 80.
• the tow band was manufactured under the same processing conditions as in Example 1 except that the ceramic moisture imparting guide was used as the first moisture imparting device.
• the moisture content of tow yarn 2 ′ was 15%
• the average value of the tension difference (T2 ⁇ T1) was 125 gf
• the moisture content of tow band 5 ′ was 35%.
• Example 3 evaluation of the spread uniformity and measurement of the crimp rate and the amount of yarn dust were performed.
• the spread uniformity in the tow band of Example 3 was score 2
• the crimp rate of the tow band was 41.0%
• the amount of yarn dust per hour was 0.20 g.
• Example 4 in the manufacturing apparatus used in Example 1 above, a spray-type emulsion oil agent application device was used as the second moisture application device instead of the moisture application guide. Otherwise, the tow band was manufactured under the same processing conditions as in Example 1 above.
• the moisture content of tow yarn 2 ′ was 15%
• the average value of the tension difference (T2 ⁇ T1) was 125 gf
• the moisture content of tow band 5 ′ was 35%.
• evaluation of the spread uniformity and measurement of the crimp rate and the amount of yarn dust were performed. As a result, the spread uniformity of the tow band of Example 4 was score 2, the crimp rate of the tow band was 41.6%, and the amount of dust per hour was 0.25 g.
• Comparative Example 1 the same production apparatus as in Example 1 was used, but in the first moisture applicator 3, the rotation condition of the cylindrical roller 12 was set to 150 rpm, and the emulsion oil was applied to the tow yarn 2. Was granted. At this time, the moisture content of the acetate tow yarn 2 ′ to which moisture was imparted by the first moisture imparting device 3 was 21%. In Comparative Example 1, the difference in tension (T2 ⁇ T1) between the tension T1 of the tow yarn near the upstream side of the guide 8 and the tension T2 of the tow yarn near the downstream side was measured. — The average value of T1) was 98 gf.
• the emulsion was applied to the tow band 5 with the second moisture applicator 6. At this time, when the moisture content of the tubands to which the emulsion oil was added was measured, the moisture content was 38%.
• the tow band to which the emulsion oil agent was applied was crimped by the crimping device 7 for crimping, and the obtained tow band was evaluated for the uniformity of opening, and the crimp rate and the amount of dust were measured. Went.
• the spread uniformity of the tow band of Comparative Example 1 was score 3
• the crimp rate of the tow band was 41.0%
• the amount of yarn dust per hour was 0.36 g.
• Comparative Example 2 in the manufacturing apparatus used in Comparative Example 1, a spray-type emulsion oil application device was used as the second moisture application device instead of the moisture application guide. Otherwise, the tow band was produced under the same processing conditions as in Comparative Example 1 above.
• the moisture content of tow yarn 2 ' was 21%
• the average value of the tension difference (T2-T1) was 98 gf
• the moisture content of tow band 5' was 38%.
• Comparative Example 3 the second moisture applicator 6 was omitted from the manufacturing apparatus used in Example 1 above, and the tow band 5 was formed by the tow band forming means 9 and then crimped to the tow band 5 without applying the emulsion oil agent.
• the setting device 7 was changed variously to give crimps.
• the moisture content of the tow yarn 2 ′ was 15%, and the average value of the tension difference (T2-T1) was 125 gf.
• T2-T1 the tension difference
• the moisture content of the tow band 5 was measured immediately before the crimp imparting device 7, the moisture content was 14%.
• the tow band was produced under the same conditions as in Example 1 except for the above conditions.
• Table 1 summarizes the production conditions of the above Examples:! To 4 and Comparative Examples:! To 3 and the evaluation results of the produced tow bands.
• Tow yarn 1st moisture applicator Tow band 2nd moisture applicator Tension difference Crimp rate (%) Tow band dust generation moisture content Moisture content (%) (gf) Spreading uniformity (g) (% Score)
• Example 1 15 Porous roller 35 Moisturizing guide 125 41.5 (good) 1 (good) 0.15
• Example 2 15 Porous roller 19 Moisturizing guide 125 41. 2 (good) 1 (good) 0.40
• Example 3 15 Moisturizing guide 35 Moisturizing guide 125 41. 0 (good) 2 (good) 0. 20
• Example 4 15 Porous roller 35 Spray type 125 41. 6 (good) 2 (good) 0.25
• Comparative Example 1 21 Porous Roller 38 Moisturizing Guide 98 41. 0 (Good) 3 (No) 0. 36
• Comparative Example 2 21 Porous Roller 38 Spray Type 98 41. 1 (Good) 4 (No) 0. 35 Comparison Example 3 15 One porous roller 14 ⁇ 125 37. 2 (No) 2 (Good) 0.45
• the present invention can be effectively applied to the production of a tow band used for processing a cigarette filter.

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