Lyocell material, cigarette filter and method for manufacturing same

Abstract

[Advantageous Effects] A lyocell material and a cigarette filter including the same provide excellent biodegradability, excellent filter manufacturing processability, and excellent cigarette physical properties (e.g., inhalation resistance) while replacing conventional cellulose acetate materials and filters.SOLUTION: [Technical Field] The present disclosure relates to a lyocell material for a cigarette filter, a cigarette filter including the lyocell material, and a method of manufacturing the same.SELECTED DRAWING: None

Description

[Technical Field]

[0001] This application is Korean Patent Application No. 10-2021-019017, dated December 28, 2021. 9, and all the contents disclosed in the documents of the Korean patent application are , which is incorporated herein by reference.

[0002] The present invention relates to a lyocell material, a cigarette filter containing the same, and a method for producing the same. . [Background technology]

[0003] Cellulose acetate fiber has been the main material used for cigarette filters. Although tobacco fiber is known to be a biodegradable material, it is made of cellulose acetate. The filter maintains its original shape for one to two years after being buried in the soil. It takes a considerable amount of time for it to be completely biodegraded. Not only are collected and buried tobacco products being treated, but tobacco products that are left abandoned in the living environment are also being treated. Considering the amount of tobacco products and their toxicity, it is necessary to further improve the biodegradability of cigarette filters. is necessary.

[0004] In addition, tobacco is a luxury item that is enjoyed by inhaling the smoke that is produced when it burns. The more uniform the concentration of smoking smoke, the better the quality of the cigarette can be evaluated. One of the items that can be evaluated in relation to uniformity is the suction resistance of the filter. It is known that resistance tends to increase proportionally with the increase in the filtering efficiency of the filter. In other words, cigarette filters with excellent resistance to drawing have excellent filtering performance against harmful substances. It can be said that it not only provides a high level of user satisfaction (quality), but also a high level of user satisfaction.

[0005] Therefore, while replacing conventional cellulose acetate materials, the material of the filter, such as suction resistance, It is necessary to develop filter materials that can achieve performance at a level equal to or higher than that of conventional technologies. do. Summary of the Invention [Problem to be solved by the invention]

[0006] One objective of this application is to develop a novel lyophilized cellulose acetate (C14) that can replace cellulose acetate commercially available for cigarette filters. The objective is to provide a cell material.

[0007] Another object of the present application is to provide a product whose manufacturing process is environmentally friendly and which is biodegradable upon disposal. To provide an excellent lyocell material for cigarette filters.

[0008] Yet another object of the present application is to provide a method for producing a cigarette filter material that satisfies the characteristics (e.g., resistance to drawing) of the material. The object of the present invention is to provide a lyocell material for cigarette filters that can add or improve the properties of the filter.

[0009] Yet another object of the present application is to provide a lyocell filter for cigarettes.

[0010] Yet another object of the present application is to provide a (super) slim type lyocell filter for cigarettes. is.

[0011] It is yet another object of the present application to provide a cigarette comprising a lyocell filter.

[0012] A further object of the present application is to provide a method for the production of said lyocell material, filters and cigarettes. The goal is to improve the efficiency of the system.

[0013] The above and other objects of the present application are achieved by the present invention as described in detail below. Both can be resolved. [Means for solving the problem]

[0014] In one embodiment, the present application relates to a method for producing a lyocell material. The lyocell material can be used to manufacture cigarette filters.

[0015] Specifically, the method includes the steps of spinning a lyocell dope, and solidifying the lyocell multifilament; and and applying steam and pressure of a roller to the lyocell multifilament. The oil-treated lyocell multifilament is then crimped by a crimping device ( and a crimping step of feeding the sheet into a crimp machine.

[0016] In the method, one or more of the steps is performed using a lyocell multifilament ( (Example: Oil-treated multifilament) The single yarn fineness of the filament is within a specified range. For example, the lyocell multifilament may be subjected to the above-mentioned controlled conditions. The single filament fineness of the filament is more than 4.0 denier and less than 8.0 denier. can.

[0017] In the method of the present application, the crimping step is expressed by the following Equation 1: The crimp draft ratio is set to

[0018] [Formula 1] 1.01≦crimp draft ratio≦1.30

[0019] In Equation 1, the crimp draft ratio is calculated as V1 / V0, where V0 is The filament movement speed before the oil-treated multifilament is fed into the crimping device V1 means the degree of crimping of the filament gripped by the rollers in the crimping device. It means the passing speed.

[0020] The method for producing a lyocell material according to the present application will be described in detail below. .

[0021] (a) Lyocell dope spinning stage This step involves the production of lyocell dope, i.e., cellulose (or cellulose pulp) and and N-methylmorpholine-N-oxide (NMMO) This is the step of spinning a lyocell spinning dope containing the lyocell.

[0022] Commercially available cellulose acetate filters are pointed out as the main cause of microplastic generation However, the amine oxide solvents used in the production of lyocell fibers Lyocell material is manufactured in a way that makes it recyclable and biodegradable upon disposal. The process does not produce any pollutants. Furthermore, lyocell tow can be recycled in a relatively short time. Lyocell is more environmentally friendly than cellulose acetate because it is biodegradable and can even be removed within a short time. It is a good material.

[0023] In one embodiment, the cellulose content in the spinning dope is 1% by weight of the total dope. It is 5 to 15% by weight based on 00% by weight. If the cellulose content is too low, If the content exceeds the above range, it is difficult to realize the properties of lyocell fiber. In consideration of this, the cellulose content in the spinning dope is set to 6% by weight. or more, 7% by weight or more, 8% by weight or more, 9% by weight or more, or 10% by weight or more, The upper limit is, for example, 14% by weight or less, 13% by weight or less, 12% by weight or less, 11% by weight or less, It may be 10% by weight or less, or even 9% by weight or less.

[0024] In one example, the spin dope contains N-methylmorpholine-N-oxide (NM The aqueous solution may be selected depending on the degree of dissolution of cellulose and the process temperature. Considering the above, for example, N-methylmorpholine-N-oxide (NMMO) 80 to 9 5 parts by weight and 5 to 20 parts by weight of water.

[0025] In one embodiment, the cellulose or cellulose pulp is made of 10% cellulose. The α-cellulose content is 85 to 97% by weight, compared to 0% by weight.

[0026] In a specific example of the present application, the degree of polymerization (DPw) of the cellulose is 600 to It's also 1,700.

[0027] In the spinning step, the shape of the spinneret for discharging the spinning dope is specifically limited. For example, a doughnut-shaped spinneret can be used.

[0028] The nozzle temperature of the spinneret, specifically the spinning temperature, can be appropriately selected by those skilled in the art. The viscosity of the spinning dope varies depending on the spinning temperature, and the extrusion may not be performed well. In consideration of this, the spinning temperature is, for example, 100°C to 120°C, or The temperature may be 110°C.

[0029] In one embodiment, the step of spinning the spinning dope comprises spinning monofilaments and / or is under spinning conditions controlled so that the fineness of the multifilament satisfies a predetermined range. For example, the single filament fineness may be greater than 4.0 denier and less than 8.0 denier. The spinning process can be carried out under controlled spinning conditions as described below. For example, the spinning dope is One or more of the spinning conditions, the output amount, and the spinning speed, are appropriately controlled to form a lyocell material. The filament single yarn fineness is more than 4.0 denier and less than 8.0 denier. In this case, the single filament fineness is the single filament fineness of the filament separated from the multifilament. It means the fineness of a single monofilament. In some cases, the number of filaments may be adjusted. By this method, the total fineness can be controlled within a predetermined range.

[0030] Specifically, the single yarn fineness of the filament is, for example, 7.5 denier or less, 7.0 denier or less. Denier or less, 6.5 denier or less, 6.0 denier or less, 5.5 denier or less, 5.0 denier The lower limit is, for example, 4.5 denier or less. denier or more, 5.0 denier or more, 5.5 denier or more, or 6.0 denier or more Satisfying the above range will ensure stable drawing resistance of the cigarette filter and ensure processability. In particular, as will be seen in the comparative example described later, the filament If the yarn fineness exceeds the above range, the resistance to drawing of the cigarette filter may be significantly reduced.

[0031] The spinning dope discharged through the spinneret undergoes a coagulation stage, which will be described later.

[0032] (b) Coagulation step and obtaining multifilaments In this step, the spun lyocell spinning dope is solidified and the lyocell multifilament is obtained. You gain Lament.

[0033] The coagulation may be carried out by contacting the spinning dope with air and / or a coagulation liquid. .

[0034] In one example, the coagulation is performed by supplying cooling air to the spun lyocell dope. a secondary coagulation step in which the primarily coagulated spinning dope is introduced into a coagulation liquid and coagulated; , which may also include.

[0035] By the coagulation method described above, the lyocell dope discharged from the spinneret The primary solidification can occur in the space between the solidification bath and the solidification tank (air gap section). In the gap section, for example, cooling is performed from the air cooling section located inside the nozzle to the outside of the nozzle. Air can be supplied. In addition, the so-called air quenching method known in the related field can be used. Primary solidification can be achieved by any formula or means.

[0036] In one example, the upper limit of the temperature of the cooling air used for the primary solidification is, for example, 15°C or less. Specifically, the cooling air is 14°C or less, 13°C or less, 12°C or less, 11°C or less. If the temperature exceeds the above range, the spinning process using air may be The loop coagulation is not sufficient, and the spinning process is not good.

[0037] The lower limit of the cooling air is determined in consideration of the spinning process and / or the uniformity of the cross section of the filament. For example, if the temperature of the cooling air is less than 4°C, the surface of the nozzle The surface of the filament becomes uneven and the spinning process becomes difficult. When the cooling air is cooled, the temperature may be 5°C or higher, 6°C or higher, 7°C or higher, 8°C or higher, or 9°C or higher. be.

[0038] The amount of cooling air supplied is determined based on the requirements for sufficient coagulation, spinning processability, and physical properties of the filaments. For example, the spinning dope may contain 70 to 300 Nm 3 More specifically, the air volume is 100 Nm 3 / h or more or 150Nm 3 / h or more, and the upper limit of the air volume is, for example, 250Nm 3 / h or less or 200Nm 3 / h or less.

[0039] After the primary solidification as described above, the cooled spinning dope is transferred to a coagulation tank containing a coagulation liquid. For proper coagulation to proceed, the coagulation liquid may be added to the bath (secondary coagulation). The temperature of the solidification liquid is, for example, 30°C or less or 25°C or less. When the temperature is maintained at 10°C or higher, 15°C or higher, or 20°C or higher, the solidification rate The degree can be maintained appropriately.

[0040] The type of coagulation liquid for the secondary coagulation as described above is not particularly limited. For example, the coagulation liquid may be one or more of water and N-methylmorpholine-N-oxide (NMMO). It also includes the above.

[0041] Although not particularly limited, the coagulation liquid may be a mixture of water and N-methylmorpholine-N-oxygen When the coagulation liquid contains NMMO, the water content is 60 to 90% by weight. The content of N-methylmorpholine-N-oxide (NMMO) is 10 to 40% by weight. Alternatively, the coagulation liquid may be 70 to 80% by weight of water and 20 to 30% by weight of It also contains N-methylmorpholine-N-oxide (NMMO). The solid-liquid concentration can be controlled to be maintained during the manufacturing process using a sensor or the like.

[0042] (c) Water washing stage If necessary, after the coagulation step and the step of obtaining the multifilament, The fibrous material may be washed with water. Such washing removes any residual fibrous material remaining in the filament. N-methylmorpholine-N-oxide (NMMO) and / or other impurities It can be removed.

[0043] The method of washing with water is not particularly limited. For example, a pulling roller is used. The coagulated lyocell multifilament is introduced into the washing tank, and the washing is Or, in the process of moving to the next stage by the pulling roller, the washing liquid is sprayed. Washing can be done by spraying water.

[0044] The components of the washing liquid are not particularly limited. For example, the washing liquid may contain water. In addition, the present invention may further contain known additives.

[0045] In addition, in consideration of reuse after washing, the temperature of the washing water is adjusted to 100°C or less. It can be used as such.

[0046] (d) Oil treatment stage This step reduces friction on the filaments and improves the crimping step described below. and applying an oil to the surface of the filament so that the crimp can be formed well. is.

[0047] Although there is no particular limitation, the oil treatment is carried out by immersing the multifilament completely in the oil. This can be done by immersing the multifilament in a bath filled with oil. Or, in the process of moving to the next stage by the pulling roller, the oil solution is sprayed. The oil treatment can also be carried out by the method.

[0048] After the oil treatment as described above, the amount of oil applied to the multifilament becomes constant. Before and / or after the oil treatment step, the multi-filament An additional step may be performed to squeeze out the oil from the surface of the ment.

[0049] In one example, the oil treatment is carried out on 100 weight percent of the oil-treated multifilament. %, the oil content may be about 5% by weight or less. The amount of oil in the treated multifilament is 4% by weight or less, 3% by weight or less, or 2% by weight or less. % by weight or less, and may be 0.5% by weight or more, 1% by weight or more, or 2% by weight or more. do.

[0050] The type of oil that can be used is not particularly limited, and may be any of the publicly known oils in the related technical field. knowledge can be used.

[0051] Optionally, after the oil treatment as described above, the oil may be dried.

[0052] In an embodiment of the present application, one or more of the aforementioned steps may be performed using a monofilament and and / or multifilaments are produced under controlled conditions to achieve a desired fineness. For example, the single yarn fineness of the filament constituting the Lyocell multifilament is 4.0 denier. The above steps can be controlled so that the yarn is 8.0 denier or less. The single filament fineness of the filament is the fineness of a single monofilament separated from a multifilament. This means the fineness of the fiber.

[0053] Specifically, the single yarn fineness of the filament is, for example, 7.5 denier or less, 7.0 denier or less. Denier or less, 6.5 denier or less, 6.0 denier or less, 5.5 denier or less, 5.0 denier The lower limit is, for example, 4.5 denier or less. denier or more, 5.0 denier or more, 5.5 denier or more, or 6.0 denier or more Satisfying the above range will ensure stable drawing resistance of the cigarette filter and ensure processability. In particular, as will be seen in the comparative example described later, the filament If the yarn fineness exceeds the above range, the resistance to drawing of the cigarette filter may be significantly reduced.

[0054] Although not particularly limited, the filaments are controlled to have a predetermined fineness range. The step of spinning is also the spinning step described above. The aforementioned spinning, coagulation, washing and oil treatment steps can all be controlled.

[0055] (e) Crimping step The crimping step involves steaming and rolling the oil-treated lyocell multifilament. This is the stage where pressure is applied by a roller to obtain a crimped tow. This step can be called the crimping step.

[0056] Through crimping, waves are given to the multifilament, and the fibers are made bulky. The crimping may have a stuffer box and / or This includes a steam box and is performed using known crimping equipment. The crimping device that can be used is, for example, a device that applies steam pressure and roll pressure, which will be described later. There are no particular limitations on the device as long as it can be used.

[0057] In one embodiment, the crimping step is performed by first crimping the lyocell multifilament. The team is supplied, the multifilament is preheated and swollen, and then the multifilament is This is done by applying pressure to the multifilament with a press roller to form wrinkles on the multifilament. In this case, a steam box is used for steam supply, and such a steam box can be used for steam supply. The box may be located at the front end of the crimping device.

[0058] In one example, the crimping step is performed by pressing the multifilament with a press roller. This can be accomplished by simultaneously applying pressure and steam.

[0059] In one embodiment, the crimping step is performed by first crimping the lyocell multifilament. The multifilament is preheated and swollen by the pressure roller. It can be performed by simultaneously applying pressure to the multifilament and steaming. .

[0060] In one example, the crimping step is performed by a crimping device (specifically, a press Before being put into the filter, the multifilament is subjected to a pressure of 0.1 to 2.0 kgf / cm 2 Steel In the specific example of the present application, the pressure is 0.2 kgf / cm 2 Greater than or equal to 0 .3kgf / cm 2 Over 0.4kgf / cm 2 More than 0.5kgf / cm 2 Greater than or 0.6kgf / cm 2 The steam can be provided by a steam box. , 1.5kgf / cm 2 Below, 1.4kgf / cm 2 Below, 1.3kgf / cm 2 below, 1.2kgf / cm 2 Below, 1.1kgf / cm 2 or less than 1.0kgf / cm 2 below If the steam supply amount or pressure is less than the above range, If the temperature exceeds the above range, the crimp will not be formed smoothly. The flexibility of the liner is increased, preventing excessive crimping of the filament in the crimping device. The wire is applied and cannot pass through the crimping device.

[0061] In one example, the crimping step uses rollers to feed the material into a crimping device. 1.5 to 4.0 kgf / cm 2 While applying pressure, In the specific example of the present application, 1.6 kgf / cm 2 More than 1.7kgf / cm 2 More than 1.8kgf / cm 2 Over 1.9kgf / cm 2 Over 2.0kgf / cm 2 Above, 2.1kgf / cm 2 Above, 2.2kgf / cm 2 Above, 2.3kgf / cm 2 Below Top, 2.4kgf / cm 2 or a pressure of 2.5 kgf / cm2 or more 3.9 kgf / cm 2 Below, 3.8 kgf / cm 2 Below, 3.7kgf / cm 2 Below, 3.6kgf / cm 2 Below, 3.5k gf / cm 2 Below, 3.4kgf / cm 2 Below, 3.3kgf / cm 2 Below, 3.2kg f / cm 2 Below, 3.1kgf / cm 2 Below, 3.0kgf / cm 2 Below, 2.9kgf / cm 2 Below, 2.8kgf / cm 2 Below, 2.7kgf / cm 2 Below, 2.6kgf / cm 2 or less than 2.5kgf / cm 2 The following pressures can be applied: If the temperature is below this range, the desired number of crimps will not be formed. If the pressure exceeds the above range, the pushing force will be too strong and the filament will be pushed into the crimping device. It cannot be smoothly fed into or passed through the stuffer box. The press rollers that provide this pressure can cause wrinkles to form in the multifilaments.

[0062] In one example, the crimping step includes applying a predetermined pressure to the multifilament. A doctor blade can be applied. The residence time of the filament fed into the paste stuffer box is adjusted (tow quality, This contributes to the number of crimps (which affects the filter performance). The ladle is pressed by the rollers, for example, and then discharged at the roller pressure point. It can be located in the path of the multifilament migration.

[0063] In a specific example of the present application, the crimping step utilizes a doctor blade to apply the crimp. The multifilament passed through the rollers of the pump device is subjected to a pressure of 0.1 to 2.0 kgf / cm 2 More specifically, the pressure applied by a doctor blade can be The pressure is 0.2kgf / cm 2 More than 0.3kgf / cm 2 More than 0.4kgf / c m 2 or more than 0.5kgf / cm 2 The upper limit of the pressure is, for example, 1.5kgf / cm 2 Below, 1.4kgf / cm 2 Below, 1.3kgf / cm 2 Below, 1 .2kgf / cm 2 Below, 1.1kgf / cm 2 or less than 1.0kgf / cm 2 Below There are also.

[0064] In one embodiment, the crimping step is performed at a temperature ranging from 120 to 250°C. If the temperature is too low, the shape stability effect of the crimp is not good, and if the temperature is too high, If the concentration of the maintenance substance in the stuffer box is high, the clean Therefore, taking into consideration the steam pressure mentioned above, it is recommended to use a temperature of 130°C or higher and 1 Above 40°C or above 150°C, and below 200°C, below 180°C, or below 160°C Within this range, the temperature can be appropriately controlled.

[0065] As described above, the crimping step is performed by crimping the wire into a crimped shape represented by the following equation 1: The crimping is performed to satisfy the raft ratio. The pressure applied to the contact is also provided by the rollers.

[0066] [Formula 1] 1.01≦crimp draft ratio≦1.30

[0067] In Equation 1, the crimp draft ratio is calculated as V1 / V0, where V0 is The filament movement speed before the oil-treated multifilament is fed into the crimping device V1 means the degree of crimping of the filament gripped by the rollers in the crimping device. The passing speed means the speed at which the material is fed in the crimping step. (or fed into a crimping device), and the multifilament is It can refer to the speed at which the sheet moves between the press rollers and / or the press rollers.

[0068] A method performed under the condition that formula 1 is satisfied can impart a uniform crimp to the tow. For example, as confirmed by the experiment described below, the embodiment manufactured under the condition satisfying the formula 1 The tows were measured to have upper and lower limits of the range of crimp counts of the tows calculated by arithmetic average. It is confirmed that the tow is close by comparison (i.e., ensuring uniformity of the tow). The tow of the present application, in which the lumps are uniformly formed, is used as a fiber or a filter when it is manufactured into a cigarette filter. This results in a high level of suction resistance, as will be explained later. can provide.

[0069] In addition, the method performed under the condition of satisfying Equation 1 will be confirmed in the experiment described below. In addition, a crimp of good shape can be imparted to the tow. A crimped tow with good shape has low resistance to attraction. This works to improve the

[0070] If the range of the formula 1 cannot be satisfied, the tow production conditions are not appropriate. , tow cannot be produced, or even if tow can be produced, The crimped shape is poor and the tow is uneven, which makes it difficult to manufacture cigarette filters. As a result, it is difficult to provide a filter with excellent suction resistance.

[0071] (f) Other stages After crimping, any appropriate post-processing can be performed.

[0072] In one example, a secondary oil treatment (g) may be additionally performed. This secondary oil treatment can prevent static electricity from being generated in the tow and can impart flexibility to the tow. This step may be the same as or similar to the oil treatment step (d) above.

[0073] In one example, a drying treatment (h) may be additionally performed. The drying may be, for example, The drying process can be carried out at a temperature ranging from 00 to 130°C. There are no particular restrictions on the type or method of drying. For example, hot air may be applied to the tow, or The tow is passed through or left in a temperature-controlled room for a certain period of time. This can be done through law, etc.

[0074] According to an embodiment of the present application, a method including a crimping step as described above can be used to crimp a sheet of paper per inch. Tows having 20 to 50 crimps per tow may be provided. The number of pumps is 25 ea / inch or more, 30 ea / inch or more, 35 ea / inch or more, It can be 40 ea / inch or more or 45 ea / inch or more, with the upper limit being, for example, 45 ea / inch or less, 40ea / inch or less, 35ea / inch or less, 30ea / inch or less The number of crimps and their uniformity are also determined by the above mentioned crimping method. The manufacturing process of the present application can be adjusted through various processes, such as the crimp draft ratio. The crimped tow produced by this method not only has the number of crimps as described above, but also has the Since the crimp is uniformly formed as described above, it is possible to manufacture a cigarette filter. When this occurs, it can provide a high level of resistance to draw, as described below.

[0075] According to the present application, a lyocell material ( The total fineness of the tow can be adjusted to the filament size that can be inserted into the filter paper. If the total fineness is too low, not enough filaments will be present in the fiber. If the total fineness is too high, The filter paper becomes overfilled, causing it to tear or become damaged. It becomes difficult to adjust the amount of tow filling required to achieve the required suction resistance. According to a specific example of the present application, the total fineness is 15,000 to 35,000 denier. For example, the lower limit of the total fineness is, for example, 16,000 or more. 17,000 or more, 18,000 or more, 19,000 or more, or even 20,000 or more The upper limit is, for example, 30,000 or less or 25,000 or less.

[0076] If the tow fineness is outside the above range, the tobacco filler may be used as in the comparative example described below. The process for manufacturing cigarette filters is not good (continuous processing is not possible due to thread breakage), During manufacturing, the amount of tow packed into the filter paper is either too low or too high. It is difficult to ensure sufficient filter properties (e.g., suction resistance). If it is outside this range, the amount of filling into the filter paper will be too large, causing the filter paper to tear. Or it becomes difficult to adjust the amount of tow filling to achieve the required resistance to suction of the filter. This may happen.

[0077] In a specific example of the present application, the fineness of the lyocell multifilament is It can be controlled to an appropriate value depending on the size.

[0078] For example, the Lyocell material is used in (ultra) slim filters (e.g., filter rods with a circumference of 1 When used in a lyocell multifilament yarn, the total fineness of the lyocell multifilament is 1 It is also in the 5,000 to 25,000 denier range. Specifically, ultra-slim filters The total fineness of the lyocell multifilament used is 16,000 denier or more, 17 ,000 denier or more, 18,000 denier or more, 19,000 denier or more, 20, 000 denier or more, 21,000 denier or more, 22,000 denier or more, 23,0 00 denier or more or 24,000 denier or more, and 23,000 denier or less, 22,000 denier or less, 21,000 denier or less Below 20,000 denier, below 19,000 denier, below 18,000 denier Below, 17,000 denier or below or 16,000 denier or below. In such cases, the single yarn fineness of the lyocell monofilament is 4.5 denier or more, for example, 5 .0 denier or more, 5.5 denier or more, 6.0 denier or more, 6.5 denier or more, 7 It can be .0 denier or more or 7.5 denier or more.

[0079] As mentioned above, the present application is directed to a total fineness in the above range, specifically, to a (super) slim filter. It is possible to provide a Lyocell material with a fineness that can ensure the desired filter performance.

[0080] The total fineness of the tow can be determined by the single filament fineness and the number of crimps. In the method of the present application, as described above, the single yarn fineness and the number of crimps are controlled. Thus, the total fineness of the tow can be ensured to be suitable for the production of a filter and for ensuring its functionality.

[0081] In another embodiment, the present application relates to a lyocell material. Lyocell material is also manufactured through a process that satisfies at least the above-mentioned formula 1. .

[0082] Specifically, the lyocell material has a crimp draft expressed by the following formula 1: Under the condition that the ratio is satisfied, the material is fed into the crimping device so that a crimp can be applied. It may also be or include manufactured crimped tow.

[0083] [Formula 1] 1.01≦crimp draft ratio≦1.30

[0084] However, in the above formula 1, the crimp draft ratio is calculated as V1 / V0, V0 means the filament moving speed before the multifilament is fed into the crimping device. V1 is the passing speed of the filament gripped by the rollers in the crimping device. It means degrees.

[0085] In an embodiment of the present application, the tow has 20 to 50 crimps per inch. The total fineness can satisfy 15,000 to 35,000 denier. is as mentioned above.

[0086] In one embodiment, the tow, i.e., a crimped lyocell multifilament The total fiber size is 15,000 to 35,000 denier. The total fineness of the multifilaments may be 15,000 to 25,000 denier. The specific values ​​are as described above.

[0087] In one example, the lyocell multifilament is a monofilament single yarn. The fineness is more than 4.0 denier and less than 8.0 denier. The specific values ​​are as mentioned above. is.

[0088] As mentioned above, in a specific example of the present application, the fineness of the lyocell multifilament is: The circumferential size of the filter can be controlled to an appropriate value.

[0089] For example, the lyocell material may be used in a (super) slim filter (e.g., a filter rod). When used in a lyocell multifilament yarn having a circumference of 19 mm or less, the total The fineness is also in the range of 15,000 to 25,000 denier. The total fineness of the Lyocell multifilament used in the filter is 16,000 denier. Over 17,000 denier, Over 18,000 denier, Over 19,000 denier Above: 20,000 denier or more, 21,000 denier or more, 22,000 denier or more , 23,000 denier or more or 24,000 denier or more, and 24,0 00 denier or less, 23,000 denier or less, 22,000 denier or less, 21,00 0 denier or less, 20,000 denier or less, 19,000 denier or less, 18,000 denier or less, 17,000 denier or less, or 16,000 denier or less. In such cases, the single yarn size of the lyocell monofilament is 4.5 denier or more, For example, 5.0 denier or more, 5.5 denier or more, 6.0 denier or more, 6.5 denier or more It may be 7.0 denier or more, 7.0 denier or more, or 7.5 denier or more.

[0090] In one example, the lyocell material is produced by the above-mentioned method for producing a lyocell material. Specifically, the above-mentioned steps of spinning, coagulation, washing with water, oil treatment and crimping can be performed. It is also manufactured through both of these processes.

[0091] Other explanations regarding the lyocell material are given in the description of the manufacturing method of the lyocell material. Since they are identical to those mentioned above, they will be omitted.

[0092] In yet another embodiment, the present application relates to a method for manufacturing a cigarette filter. The method may include any of the methods for producing lyocell materials described above. be.

[0093] Specifically, the method includes the steps of spinning a lyocell dope, and solidifying the lyocell multifilament; and The step of oiling the lyocell multifilament and applying pressure with steam and rollers. The oil-treated lyocell multifilament is placed in a crimping device so that The crimping step of feeding the tow and manufacturing the filter using the crimped tow and

[0094] And, the manufacturing method of the cigarette filter (specifically, the manufacturing process of the lyocell material) At least one of the steps is performed using a lyocell multifilament (e.g., an oil-treated lyocell). Under controlled conditions, the fineness of the fiber (multifilament) is within a specified range. For example, one or more of the steps included in the method of the present application may be performed using a multifilament The single yarn fineness of the monofilament that forms the yarn is more than 4.0 denier and less than 8.0 denier. This can be accomplished under controlled conditions such as:

[0095] At each stage involved in the manufacturing process of the cigarette filter, the same steps as those described for the Lyocell material are used. The overlapping stages are omitted here because their contents are the same.

[0096] In addition, in a specific example of the present application, the crimping step is expressed by the following Equation 1: The crimp draft ratio can be adjusted to meet the required requirements.

[0097] [Formula 1] 1.01≦crimp draft ratio≦1.30

[0098] However, in the above formula 1, the crimp draft ratio is calculated as V1 / V0, V0 is the filament thickness before the oil-treated multifilament is fed into the crimping device. V1 means the feed speed of the filler held by the rollers in the crimping device. This means the speed at which the material passes through the ment.

[0099] In one example, the tow has 20 to 50 crimps per inch. The specific explanation is the same as that described above, so it will be omitted here.

[0100] The steps of fabricating the filter, which are performed after the crimping step, are carried out by known methods. For example, a tow-filled wrapper (such as a wrapper, filter, or The filter is manufactured by forming a rod shape into a filter paper (which may also be called a filter wrapping paper). Alternatively, the filter paper filled with the rod-shaped tow can be cut to an appropriate length. The filter can be manufactured by cutting the filter into pieces.

[0101] The wrapping paper is made of the above-mentioned lyocell tow (i.e., at least oil-treated and crimped). A porous paper that can encase the filter (a given tow) and maintain the filter shape (e.g., a cylinder or a tube). Or it may be a non-porous paper.

[0102] In one example, when a porous wrapper is used, the wrapper has a porosity of 10 to 50.0 Specifically, the lower limit of the porosity of the wrapper paper is For example, over 1,000 CU, over 5,000 CU, over 10,000 CU, over 15,000 0CU or more, 20,000CU or more, 25,000CU or more, 30,000CU or more, 3 is 5,000 CU or more, 40,000 CU or more, or 45,000 CU or more; and The upper limit is, for example, 45,000 CU or less, 40,000 CU or less, 35,000 CU or less. Below, 30,000CU or less, 25,000CU or less, 20,000CU or less, 15,0 00CU or less, 10,000CU or less or 5,000CU or less.

[0103] In an embodiment of the present application, the cigarette filter may have a predetermined shape and size.

[0104] For example, the filter may have a rod shape. The filter may have a cylindrical shape.

[0105] The filter may have a length of, for example, 10 to 150 mm. The length of the filter is set to 20mm or more, 30mm or more, 40mm or more, or 50mm or more. Over 60mm, Over 70mm, Over 80mm, Over 90mm, Over 100mm, 1 10mm or more, 120mm or more, 130mm or more, 140mm or more, or 150mm or more The upper limit is 150mm or less, 140mm or less, 130mm or less, 12 0mm or less, 110mm or less, 100mm or less, 90mm or less, 80mm or less, 70mm Less than, 60mm or less, 50mm or less, 40mm or less, 30mm or less or 20mm or less There are also.

[0106] In a specific example of the present application, the filter having said length is also circular in cross section and The circumference of the circular cross section is in the range of 10 mm to 30 mm. The circumference has a lower limit of 15 mm or more, 20 mm or more, or 25 mm or more, and The upper limit may be 25 mm or less, 20 mm or less, or 15 mm or less.

[0107] Although not particularly limited, the tow may be opened before filling the filter paper with the tow. It can be treated or plasticized.

[0108] In one embodiment, the cigarette filter produced by the method is KS H ISO Resistance to suction measured by 6565 must be 375mmH2O or more. Specifically, the drawing resistance of the cigarette filter is 380 mmH2O or more, 390 mmH2O or more H2O or more, 400mmH2O or more, 410mmH2O or more, 420mmH2O or more, 4 30mmH2O or more, 440mmH2O or more, 450mmH2O or more, 460mmH2O The upper limit of the suction resistance is, for example, 8 Specifically, the upper limit of the suction resistance is, for example, 800 mmH2O or less. H2O or less, 750mmH2O or less, 700mmH2O or less, 650mmH2O or less, 6 00mmH2O or less, 550mmH2O or less, 500mmH2O or less, 450mmH2O or below or 400mmH2O.

[0109] Although not particularly limited, the suction resistance is set to a value between 10 mm and 30 mm in circumference. The values ​​were also measured on filter rods measuring 15 mm to 27 mm. The circumference of the filter depends on the number of crimps in the tow, the quality of the tow (e.g., uniformity of the crimp shape), etc. The resistance to attraction can be determined by factors such as fineness and cross-sectional shape.

[0110] Although not particularly limited, the suction resistance is preferably 5,000 to 15,000°C. The length of the wrapper is in the range of 60 mm to 150 mm. It was also measured on the rutterod.

[0111] Although not particularly limited, the weight of the attraction resistance is 300 mg to 1 ,000mg, 400mg to 900mg, 500mg to 800mg, or 60 It was also measured for rod-shaped filters ranging from 0 mg to 700 mg.

[0112] As mentioned above, the present application relates to the fineness in the above-mentioned range, specifically, (ultra) slim fill It is possible to provide a Lyocell material with a fineness that can ensure suitable filter performance for the filter. Cigarette filters containing such lyocell material can have a predetermined resistance to draw.

[0113] For example, the Lyocell material is used in (ultra) slim filters (e.g., filter rods with a circumference of 1 9 mm or less, and specifically, the upper limit of the circumference is, for example, 18.5 mm or less. , 18mm or less, 17.5mm or less, 17mm or less, 16.5mm or less, and The limits are, for example, 15.0 mm or more, 15.5 mm or more, 16.5 mm or more, 17.0 mm (17.5mm or more, 18.0mm or more, or 18.5mm or more) When the lyocell multifilament is used, the total fineness of the lyocell multifilament is 15,000 to 25,000 0 denier range. Specifically, Lyocell multi-filament used in ultra-slim filters The total filament size is 16,000 denier or more, 17,000 denier or more, 18 ,000 denier or more, 19,000 denier or more, 20,000 denier or more, 21, 000 denier or more, 22,000 denier or more, 23,000 denier or more or 24 ,000 denier or more, and 24,000 denier or less, 23,000 denier or less 22,000 denier or less, 21,000 denier or less, 20,000 denier or less Below 19,000 denier, below 18,000 denier, below 17,000 denier or 16,000 denier or less. In such cases, lyocell monofilament The single yarn fineness of the yarn is 4.5 denier or more, for example, 5.0 denier or more, 5.5 denier or less Above, 6.0 denier or more, 6.5 denier or more, 7.0 denier or more or 7.5 denier Cigarette filters containing Lyocell material of such fineness are KS H IS The resistance to draw measured by O 6565 is 375 mmH2O or more. The cigarette filter has a viscosity of 380mmH2O or more, 390mmH2O or more, 400mmH2O or more 2O or more, 410mmH2O or more, 420mmH2O or more, 430mmH2O or more, 44 0mmH2O or more, 450mmH2O or more, 460mmH2O or more, 470mmH2O or more Upper, 480mmH2O or more, 490mmH2O or more, 500mmH2O or more, 510mm H2O or more, 520mmH2O or more, 530mmH2O or more, 540mmH2O or more, 5 50mmH2O or more, 560mmH2O or more, 570mmH2O or more, 580mmH2O The resistance to suction may be 590 mmH2O or more, or 600 mmH2O or more. The upper limit of the suction resistance is, for example, 810 mmH2O or less, specifically, 800 mmH2O. O or less, 750mmH2O or less, 700mmH2O or less, or 650mmH2O or less be.

[0114] A filter having the above-mentioned resistance to attraction value is effective in reducing the concentration of smoke when a user smokes a cigarette. It can provide uniformity of intensity and excellent filter performance.

[0115] In yet another embodiment of the present application, the present application relates to a cigarette filter. The cigarette filter includes a lyocell material, and the lyocell material is the same as that described above. It is also the same.

[0116] Specifically, the lyocell material has a crimp draft ratio expressed by the following formula 1: The product is fed into the crimping device so that the crimp can be applied under conditions that satisfy the rate. It is also a crimped toe made by

[0117] [Formula 1] 1.01≦crimp draft ratio≦1.30

[0118] However, in the above formula 1, the crimp draft ratio is calculated as V1 / V0, V0 means the filament moving speed before the multifilament is fed into the crimping device. V1 is the passing speed of the filament gripped by the rollers in the crimping device. It means degrees.

[0119] In an embodiment of the present application, the tow has 20 to 50 crimps per inch. The total fineness is 15,000 to 35,000 denier. As mentioned above.

[0120] In one embodiment, the lyocell material contained in the cigarette filter is the above-mentioned lyocell It is also manufactured by the manufacturing method of the material. Specifically, the above-mentioned spinning, coagulation, and water washing It is also manufactured through both the oil treatment and crimping steps.

[0121] In one example, the cigarette filter further includes a cigarette paper. The cigarette filter includes a lyocell material and a wrapper that encases the lyocell material. The explanation regarding the wrapping paper has been given above, so it will be omitted here.

[0122] The description of the filter shape has been given above, so it will be omitted here.

[0123] In one embodiment, the cigarette filter has a viscosity measured according to KS H ISO 6565. The resistance to suction is 375 mmH2O or more. The suction resistance of the Baco filter is 380mmH2O or more, 390mmH2O or more, and 400mm H2O or more, 410mmH2O or more, 420mmH2O or more, 430mmH2O or more, 4 40mmH2O or more, 450mmH2O or more, 460mmH2O or more, or 470mmH The upper limit of the suction resistance may be, for example, 810 mmH2O or less. More specifically, the upper limit of the suction resistance is 800 mmH2O or less, 750 mmH2O or less. 2O or less, 700mmH2O or less, 650mmH2O or less, 600mmH2O or less, 55 0mmH2O or less 500mmH2O or less 450mmH2O or less 400mmH2O It is also.

[0124] Although not particularly limited, the resistance to attraction is set to a value between 10 mm and 30 mm in circumference, The values ​​were also measured on filter rods measuring 15 mm to 27 mm. The circumference of the filter depends on the number of crimps in the tow, the quality of the tow (e.g., uniformity of the crimp shape), etc. The suction resistance can be determined by factors such as the fineness and cross-sectional shape.

[0125] Although not particularly limited, the suction resistance is preferably 5,000 to 15,000°C. The length of the wrapper is in the range of 60 mm to 150 mm. It was also measured on the rutterod.

[0126] Although not particularly limited, the resistance to attraction is in the range of 300 mg to 10 00mg, 400mg to 900mg, 500mg to 800mg, or 600mg These have also been measured on rod-shaped filters ranging from 700 mg to 700 mg.

[0127] As mentioned above, the present application relates to the fineness in the above-mentioned range, specifically, (ultra) slim fill It is possible to provide a Lyocell material with a fineness that can ensure suitable filter performance for the filter. Cigarette filters containing such lyocell material can have a predetermined resistance to draw.

[0128] For example, the Lyocell material is used in (ultra) slim filters (e.g., filter rods with a circumference of 1 9 mm or less, specifically, the upper limit of the circumference is, for example, 18.5 mm or less, 18mm or less, 17.5mm or less, 17mm or less, 16.5mm or less, and the lower limit For example, 15.0mm or more, 15.5mm or more, 16.5mm or more, 17.0mm or more (17.5mm or more, 18.0mm or more, or 18.5mm or more) In this case, the total fineness of the lyocell multifilament is 15,000 to 25,000 The denier range is also as follows. Specifically, the Lyocell multi-filament used in the ultra-slim filter is The total filament size is 16,000 denier or more, 17,000 denier or more, 18 ,000 denier or more, 19,000 denier or more, 20,000 denier or more, 21, 000 denier or more, 22,000 denier or more, 23,000 denier or more or 24 ,000 denier or more, and 24,000 denier or less, 23,000 denier or less 22,000 denier or less, 21,000 denier or less, 20,000 denier or less Below 19,000 denier, below 18,000 denier, below 17,000 denier or 16,000 denier or less. In such cases, lyocell monofilament The single yarn fineness of the yarn is 4.5 denier or more, for example, 5.0 denier or more, 5.5 denier or less Above, 6.0 denier or more, 6.5 denier or more, 7.0 denier or more or 7.5 denier Cigarette filters containing Lyocell material of such fineness are KS H IS The resistance to draw measured by O 6565 is 375 mmH2O or more. The cigarette filter has a viscosity of 380mmH2O or more, 390mmH2O or more, 400mmH2O or more 2O or more, 410mmH2O or more, 420mmH2O or more, 430mmH2O or more, 44 0mmH2O or more, 450mmH2O or more, 460mmH2O or more, 470mmH2O or more Upper, 480mmH2O or more, 490mmH2O or more, 500mmH2O or more, 510mm H2O or more, 520mmH2O or more, 530mmH2O or more, 540mmH2O or more, 5 50mmH2O or more, 560mmH2O or more, 570mmH2O or more, 580mmH2O The resistance to suction may be 590 mmH2O or more, or 600 mmH2O or more. The upper limit of the suction resistance is, for example, 810 mmH2O or less, specifically, 800 mmH2O. O or less, 750mmH2O or less, 700mmH2O or less, or 650mmH2O or less be.

[0129] A filter having the above-mentioned resistance to attraction value is effective in reducing the concentration of smoke when a user smokes a cigarette. It can provide uniformity of intensity and excellent filter performance. [Effects of the Invention]

[0130] According to the present application, a tobacco filler that can replace the widely commercialized cellulose acetate (CA) is The present application provides a lyocell material for cigarettes, and a cigarette filter comprising the same. Not only is it biodegradable, but it also has excellent filter manufacturing process and excellent tobacco It has the effect of an invention that provides physical properties (e.g., resistance to attraction). DETAILED DESCRIPTION OF THE INVENTION

[0131] The functions and effects of the invention will be explained in more detail below through specific examples of the invention. However, they are presented as examples of the invention and are not intended to be limiting. The scope of rights is not limited in any way.

[0132] Examples and Comparative Examples Lyocell materials were produced through the processes described in the following examples and comparative examples. Conditions not otherwise mentioned were made within the scope of the foregoing description.

[0133] Example 1 Cellulose pulp with a degree of polymerization (DPw) of 820 and an α-cellulose content of 93.9% N-methylmorpholine-N-oxide containing 0.01 wt% of propyl gallate (NMMO) / H2O solvent, and the concentration was 11 wt%. Then, the filler was extracted from the spinning nozzle while maintaining the spinning temperature at 110°C. The discharge amount and spinning speed were adjusted so that the single yarn fineness of the ment was 4.8 denier. The yarn was spun.

[0134] The filament-shaped spinning dope discharged from the spinning nozzle passes through an air gap section, The coagulation liquid in the coagulation tank (75 wt% water and N-methylmorpholine-N-oxide (NMMO) The solidified liquid was then fed to a coagulation liquid (having a concentration of 25 wt% and a temperature of about 25°C). The cooling air in the gap section is 8°C and 200 Nm 3 / h air volume, spinning The dope is solidified first. Also, the concentration of the solidifying liquid is continuously monitored using a sensor and a refractometer. I grinned.

[0135] The solidified lyocell filaments were then washed with water. The filament is introduced, and the remaining material in the filament is washed with water sprayed from the washing device. The remaining N-methylmorpholine-N-oxide (NMMO) was removed. The coated filament was immersed in a bath designed to have an oil concentration of 2 wt %.

[0136] The filament was pulled by a nip roll at the discharge section of the bath at 2 kgf / cm 2 The fabric was then treated with pressure and fed into a crimping device to create wrinkles. The crimp draft ratio was set to 1.1 times, and the steam box , steam pressure 0.5kgf / cm 2 The roller pressure of the crimping device is 2. 5kgf / cm 2 Adjust the blade pressure to 0.5kgf / cm 2 Set it to At this time, the crimping ratio was calculated as described above.

[0137] The produced tow is subjected to secondary oil treatment to prevent static electricity and give flexibility. Then, the tow was passed through a continuous drying device set at 120°C to obtain a dried tow product. The total fineness of the tow is as shown in Table 1.

[0138] Example 2 The filament single yarn fineness is 5.0 denier, and the crimp ratio is 1 Tobacco flakes were prepared in the same manner as in Example 1, except that the conditions were adjusted to 0.05. Lyocell tow for filter was produced. The total fineness of the tow was as shown in Table 1. be.

[0139] Example 3 The filament single yarn fineness is 5.0 denier, and the crimp ratio is 1 Tobacco fillets were prepared in the same manner as in Example 1, except that the conditions were adjusted to 0.2 times the original amount. Lyocell tow for lattice was produced. The total fineness of the tow was as shown in Table 1. do.

[0140] Comparative Example 1 The filament single yarn fineness is 4.0 denier, and the crimp ratio is 1 Tobacco fillets were prepared in the same manner as in Example 1, except that the concentration was adjusted to 0.0 times. Lyocell tow for lattice was produced. The total fineness of the tow was as shown in Table 1. do.

[0141] Comparative Example 2 The filament single yarn fineness is 4.0 denier, and the crimp ratio is 1 Tobacco flakes were prepared in the same manner as in Example 1, except that the conditions were adjusted to 0.35 times the original concentration. Lyocell tow for filter was produced. The total fineness of the tow was as shown in Table 1. be.

[0142] Comparative Example 3 The filament single yarn fineness is 4.0 denier, and the crimp ratio is 1 The same method as in Example 1 was used to prepare a cigarette filter, except that the concentration was adjusted to 0.5 times. Lyocell tow was produced, and the total fineness of the tow was as shown in Table 1.

[0143] Comparative Example 4 The same method as in Example 1 was used, except that the single filament fineness was 8.5 denier. Thus, lyocell tow for cigarette filters was produced. At this time, the total fineness of the tow was as shown in Table 1. As described.

[0144] Evaluation or Measurement of Example Tows and Comparative Example Tows The following items were measured or evaluated for each of the Examples and Comparative Examples, and the results are shown in Table 1. It is stated in the following.

[0145] 1. Tow fineness (denier) The tow to be measured is taken as a 2m sample and kept at a constant temperature and humidity of 20°C and 65%. Allow to stand in a room with a temperature controlled atmosphere for 24 hours to stabilize. A 2 kg weight is attached to the opposite end of the tow. The tow is kept stretched by the load for 5 seconds. After stabilization, the sample was cut into 90 cm pieces and weighed. The fineness is determined by multiplying the weight measured by the denier conversion method by 10,000. Dividing the total fineness by the number of filaments gives the single yarn fineness.

[0146] 2. Number of crimps Measured according to KS K 0326 standard. Specifically, the crimp is not damaged. Take 0 tow samples and attach a pre-prepared glossy paper strip (air distance 25 mm) to celluloid 4 or 5% amyl acetate adhesive, and each single fiber is stretched 25±5% per attached length. After attaching it, leave it to dry and allow the adhesive to dry.

[0147] For the sample, a crimp tester was used, and each test piece was tested at 1.96 / 1.00 per De. An initial load equivalent to 0 cN (= 2 mgf) was applied, and the number of crimps in a 25 mm interval was calculated. The upper and lower limits of the number of crimps measured for the 20 pieces were then recorded.

[0148] 3. Crimp shape The crimp shape was measured by sampling in the same way as for measuring the number of crimps and observing it through an optical microscope. The shape of the crimp was confirmed with the naked eye. Specifically, the crimp was The results were checked to see if they were uniform and formed, and were classified as follows: Good: The crimp is uniform across the width of the sample. Poor: The crimp is not uniform across the width of the sample.

[0149] 4. Cigarette filter manufacturing process Tow is fed into the cigarette filter manufacturing equipment, and one batch of samples is completely consumed. The process was confirmed to be sustainable up to the point where it was completed.

[0150] 5. Cigarette filter drawing resistance and circumference Tobacco filter rods were manufactured using the tows manufactured in the examples and comparative examples. (Rod weight 650 mg) Specifically, the lyocell produced in the examples and comparative examples The tow is wrapped in wrapping paper (6,500 CU porous paper) and the axial length is 120 mm. A cylindrical filter rod having a circumference as shown in Table 1 below was manufactured.

[0151] And, based on the KS H ISO 6565 standard, a suction resistor and a circumference measuring instrument are used. The suction resistance and circumference were measured for each rod.

[0152] [Table 1]

[0153] As can be seen from Table 1, the specific examples of the present application control the tow manufacturing conditions. The number of crimps is uniformly formed at an appropriate level, and the cigarette filter manufacturing process is good. It is also confirmed that the resistance to draw of the filter can be improved.

[0154] Specifically, in the case of Comparative Example 1, the tow production conditions were not appropriate, and the tow was not produced. In the cases of Comparative Examples 2 to 4, the performance of the filter could not be confirmed. Although it was possible to produce a tow, the shape of the tow was poor and the number of crimps was not uniform. As a result, the processability during cigarette filter production was not good, and the filter The filter performance (resistance to attraction) is also not as good as that of the embodiment.

Claims

1. spinning a lyocell dope; coagulating the spun lyocell dope to obtain a lyocell multifilament; Treating the lyocell multifilament with an oil; The pressure of the steam and the roller is applied to the lyocell multifilament. The crimping step involves feeding the oil-treated lyocell multifilament into the crimping device. and, The single filament fineness of the filament constituting the lyocell multifilament is more than 4.0 denier. 8.0 denier or less, The crimping step satisfies a crimp draft ratio expressed by the following Equation 1: The manufacturing method of the lyocell material for cigarette filters is carried out as follows: [Formula 1] 1.01≦crimp draft ratio≦1.30 However, in the above formula 1, the crimp draft ratio is V １ / V ０ is calculated as V ０ The oil-treated multifilament is the filament before it is fed into the crimping device. means the speed of movement of the １ In the crimping device, the filler is held by the rollers. This means the speed at which the material passes through the ment.

2. The single filament fineness of the filament constituting the lyocell multifilament is more than 4.0 denier. In order to make the denier of the spinning dope less than 8.0, one or more of the amount of spinning dope discharged and the spinning speed is adjusted.

2. The method for producing the lyocell material for cigarette filters according to claim 1, wherein the yarn conditions are controlled. Law.

3. The crimping step is performed by crimping the multifilament fed into the crimping device with a crimping force of 0.1 or more. Stone 2.0 kgf / cm ２ 10. The tobacco of claim 1, wherein the heating is carried out while adding steam of 1000 kJ / min. Manufacturing method for lyocell material for filters.

4. The crimping step uses rollers to crimp the multi-filament material fed into the crimping device. 1.5 to 4.0 kgf / cm ２ The method according to claim 3, wherein the pressure is A method for producing the lyocell material for cigarette filters described above.

5. The crimping step utilizes a doctor blade and passes the material through rollers of a crimping device. The multifilament is subjected to a tension of 0.1 to 2.0 kgf / cm ２ It is carried out under pressure 5. A method for producing the lyocell material for cigarette filters according to claim 4, wherein the lyocell material is

6. The step of spinning the dope comprises mixing cellulose pulp and N-methylmorpholine-N-oxopropanol. The method according to claim 1, wherein the method is carried out while spinning a lyocell spinning dope containing NMMO. A method for manufacturing lyocell material for cigarette filters.

7. The coagulation step of obtaining the lyocell multifilament is performed by cooling the spun lyocell dope. The primary coagulation stage involves supplying cooling air, and the primary coagulated spinning dope is introduced into the coagulation liquid. and a secondary solidification step of solidifying the lyocell material for cigarette filters according to claim 1. Law.

8. The primary solidification stage is carried out by applying air at a temperature of 15°C or less at a pressure of 70 to 300 Nm ３ / h air volume The tobacco fiber according to claim 7 is produced while feeding the lyocell dope. Manufacturing method for lyocell material for filters.

9. The secondary coagulation step is performed by introducing the primary coagulated spinning dope into a coagulation liquid having a temperature of 30° C. or less.

8. A method for producing a lyocell material for cigarette filters according to claim 7, wherein the method is carried out by

10. After the step of obtaining the multifilament and before the step of treating with oil, the coagulated lyocell The cigarette filter of claim 1, further comprising a step of washing the multifilament with water. How lyocell material is made.

11. 10. The method of claim 1, wherein the tow has 20 to 50 crimps per inch. A method for producing the lyocell material for cigarette filters described above.

12. 12. The method of claim 11, wherein the tow has a total denier of 15,000 to 35,000. A method for producing the lyocell material for cigarette filters according to claim 1.

13. The crimp draft ratio is expressed by the following formula 1. The crimped tow is produced by being fed into a crimping device so that a crimp can be applied thereto. having 20 to 50 crimps per inch; Lyocell for cigarette filters having a total fineness of 15,000 to 35,000 denier material: [Formula 1] 1.01≦crimp draft ratio≦1.30 However, in the above formula 1, the crimp draft ratio is V １ / V ０ is calculated as V ０ means the filament moving speed before the multifilament is fed into the crimping device. Taste it, V １ is the passing speed of the filament gripped by the rollers in the crimping device. It means degrees.

14. spinning a lyocell dope; coagulating the spun lyocell dope to obtain a lyocell multifilament; Treating the lyocell multifilament with an oil; The oil is applied so that the pressure of the steam and the roller is applied to the lyocell multifilament. a crimping step in which the agent-treated lyocell multifilament is fed into a crimping device; 、 and manufacturing a filter using the crimped tow; The single filament fineness of the filament constituting the lyocell multifilament is more than 4.0 denier. 8.0 denier or less, The crimping step satisfies a crimp draft ratio expressed by the following Equation 1: The method for producing a cigarette filter is carried out as follows: [Formula 1] 1.01≦crimp draft ratio≦1.30 However, in the above formula 1, the crimp draft ratio is V １ / V ０ is calculated as V ０ The oil-treated multifilament is the filament before it is fed into the crimping device. means the speed of movement of the １ In the crimping device, the filler is held by the rollers. This means the speed at which the material passes through the ment.

15. The resistance to suction measured by KS H ISO 6565 is 375 mmH ２ O or above 15. A method for producing a cigarette filter according to claim 14, wherein the method comprises: The resistance to attraction was measured by manufacturing a filter rod having a circumference in the range of 10 mm to 30 mm. (These measurements were taken at the time of the test.)

16. The resistance to suction measured by KS H ISO 6565 is 810 mmH ２ Below O 16. A method for producing a cigarette filter according to claim 15, wherein the method comprises: The resistance to suction was measured when a filter rod having a circumference in the range of 10 mm to 30 mm was manufactured. (This is what was measured).

17. A cigarette filter containing lyocell material, The lyocell material satisfies the crimp draft ratio expressed by the following formula 1. The product is put into a crimping device so that the crimp can be applied under the specified conditions. It is a crimped toe, The tow has 20 to 50 crimps per inch and a total fineness of 15.00 0 to 35,000 denier cigarette filters: [Formula 1] 1.01≦crimp draft ratio≦1.30 However, in the above formula 1, the crimp draft ratio is V １ / V ０ is calculated as V ０ means the filament moving speed before the multifilament is fed into the crimping device. Taste it, V １ is the passing speed of the filament gripped by the rollers in the crimping device. It means degrees.

18. The resistance to suction measured by KS H ISO 6565 is 375 mmH ２ O or above 18. A cigarette filter according to claim 17, wherein the resistance to drawing is greater than or equal to 10 mm in circumference. (Measurements were taken when producing filter rods within the 30 mm range).

19. The resistance to suction measured by KS H ISO 6565 is 810 mmH ２ Below O 18. A cigarette filter according to claim 17, wherein the resistance to drawing is greater than or equal to 10 mm in circumference. (Measurements were taken when producing filter rods within the 30 mm range).

20. 20. A cigarette filter according to claim 18 or 19, having a circumference of 19 mm or less.

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