Medium-tar conventional monitoring cigarette and preparation method thereof

Abstract

The present invention relates to a medium-tar conventional monitoring cigarette and a preparation method thereof, belonging to the field of tobacco technology. The monitoring cigarette of the present invention exhibits good uniformity in physical, chemical, and smoke release properties. The ratio of nicotine release, tar release, and carbon monoxide release in the monitoring cigarette is 1:10:10, and the tar release is 13.9 to 15.6 mg / cigarette, meeting the requirements of ISO 16055:2019 for "14mg" conventional monitoring cigarettes. This performance is close to that of CM series monitoring cigarettes, which have a designed tar release value of 14mg, and can meet the current testing needs of the tobacco industry.

Description

Technical Field

[0001] The invention relates to a medium-tar conventional monitoring cigarette and a preparation method thereof, belonging to the technical field of tobacco. Background Art

[0002] Monitoring cigarettes is currently the most common and effective means at home and abroad to evaluate whether the smoke analysis process is in a controllable state.

[0003] Monitor cigarettes are primarily used to monitor the stability of the smoking machine puffing process and to determine whether the cigarette smoke analysis process (GB / T19609-2004 "Cigarettes - Determination of Total Particulate Matter and Tar - Conventional Analytical Smoking Machines", GB / T 23355-2009 "Determination of Nicotine in Total Particulate Matter - Gas Chromatography", and GB / T 23356-2009 "Determination of Carbon Monoxide in the Gas Phase of Cigarette Smoke - Non-scattered Infrared Method") is in a state of statistical control. Monitor cigarettes should not be used for calibration purposes, and values ​​obtained from monitor cigarettes must not be used to correct analytical data from calculated samples.

[0004] To ensure the reliability of each laboratory's smoke test results, CORESTA organizes the production of a batch of monitoring cigarettes (CM series smoke monitoring cigarettes, referred to as CM cigarettes) every 3-4 years, numbers them by batch, and distributes them to the international tobacco industry; my country's tobacco industry organizes the production of a batch of smoke monitoring cigarettes every two years and distributes them domestically.

[0005] CM cigarettes are widely used both domestically and internationally due to their high tar yield (designed to be 14mg), high puff count, and practicality. The smoke indicators for a 14mg tar yield monitoring cigarette are as follows: 14mg of tar and carbon monoxide; 1.4mg of nicotine. However, due to numerous factors influencing puff count, tar yield, nicotine yield, and carbon monoxide yield, the reproducibility of these indicators is poor. In recent years, CORESTA has stopped providing CM monitoring cigarettes to prevent CM smoke cigarettes from reaching consumers, which would violate EU directives (tar / nicotine in smoke / carbon monoxide in smoke limits: 10mg\1mg\10mg) and reduce tar and puff counts, which would result in poor monitoring cigarette usage. Furthermore, considering commercial operations, my country has also concluded through years of research and use of smoke monitoring cigarettes that it is difficult to effectively monitor the smoke analysis status of conventional cigarettes using conventional monitoring cigarettes with a low puff count. Therefore, China is faced with the problem of appropriately increasing the puff count to improve the practicality of monitoring cigarettes.

[0006] In order to bring monitoring cigarettes with a design value of 14mg of tar release into line with the international (CM series) standards and to compensate for the impact of the discontinuation of the supply of CM smoke monitoring cigarettes on the international tobacco industry, it is urgent to develop a medium-tar conventional monitoring cigarette with a design value of 14mg of tar release that meets the needs of the tobacco industry. Summary of the Invention

[0007] The object of the present invention is to provide a conventional monitoring cigarette for medium tar to meet the detection needs of the tobacco industry.

[0008] Another object of the present invention is to provide a method for preparing medium-tar conventional monitoring cigarettes.

[0009] In order to achieve the above-mentioned purpose, the technical solution adopted by the conventional monitoring of tar in cigarettes of the present invention is as follows:

[0010] A medium-tar conventional monitoring cigarette, which is formed by butting a mouthpiece and a tobacco rod together through tipping paper; the tobacco rod includes tobacco and cigarette paper wrapping the tobacco;

[0011] The shredded tobacco is made from tobacco leaves produced in Qujing, and the grade of the tobacco leaves is CX65;

[0012] The width of the tobacco is 0.85-0.95 mm, and no glycerin is added to the tobacco; the moisture content of the tobacco is 11%-13.5%; the density of the tobacco in the tobacco rod is 255-265 mg / cm 3 ;

[0013] The cigarette paper is mainly made of wood pulp, calcium carbonate and potassium citrate; the mass fraction of calcium carbonate in the cigarette paper is 30%, and the mass fraction of potassium citrate in terms of citrate ions is 1.2-1.4%; the air permeability of the cigarette paper is 46.5-53.5 CU, the coefficient of variation of the air permeability is no more than 5%, and the basis weight is 27.3-28.7 g / m 2 ; The width of the cigarette paper is 26.35 to 26.65 mm;

[0014] The circumference of the nozzle rod is 23.95-24.25 mm; the filaments in the nozzle rod are cellulose acetate filaments; the linear density of the filaments is 3.48-3.62 ktex, the coefficient of variation of the linear density is ≤0.50, and the linear density of the single filament is 2.46-2.86 dtex; the pressure drop per 120 mm length of the nozzle rod is 4600-5000 Pa; the triacetin content in the nozzle rod is 7-8%;

[0015] The monitoring cigarette has a mass of 0.91-1.05 g / stick, a circumference of 24.1-24.5 mm, a length of 83.5-84.5 mm, a mouthpiece length of 20 mm, and a connecting width of 30 mm.

[0016] The monitoring cigarettes of the present invention have good uniformity in physical, chemical and smoke release properties. The ratio of nicotine release, tar release and carbon monoxide release of the monitoring cigarettes is 1:10:10, and the tar release is 13.9-15.6 mg / cigarette, which meets the requirements of ISO 16055:2019 for "14mg" conventional monitoring cigarettes. The performance is close to that of CM series monitoring cigarettes with a designed tar release value of 14mg, and can meet the current testing needs of the tobacco industry.

[0017] Preferably, each tray of the tipping paper has ≤1 tipping piece.

[0018] Preferably, the score line length of the tipping paper is 33 mm.

[0019] In the present invention, the scoreline length refers to the length of the cigarette butt, which is determined by the maximum of the following three lengths: (1) 23 mm; (2) filter length + 8 mm; (3) tipping paper length + 3 mm. In the present invention, when the tipping width is 30 mm, the scoreline length of the tipping paper is 33 mm because the value of the tipping width (tipping paper length) + 3 mm is the largest, that is, 33 mm.

[0020] The technical solution adopted by the method for preparing medium-tar conventional monitoring cigarettes of the present invention is:

[0021] A method for preparing medium-tar conventional monitoring cigarettes comprises the following steps: using a cigarette making machine to butt-join and laminate a tobacco rod and a filter rod through tipping paper, and then cutting and segmenting the tobacco rod to obtain monitoring cigarettes; the tobacco rod comprises tobacco and cigarette paper wrapping the tobacco;

[0022] The shredded tobacco is made from tobacco leaves produced in Qujing, and the grade of the tobacco leaves is CX65;

[0023] The width of the tobacco is 0.85-0.95 mm, and no glycerin is added to the tobacco; the moisture content of the tobacco is 11%-13.5%; the density of the tobacco in the tobacco rod is 255-265 mg / cm 3 ;

[0024] The cigarette paper is mainly made of wood pulp, calcium carbonate and potassium citrate; the mass fraction of calcium carbonate in the cigarette paper is 30%, and the mass fraction of potassium citrate in terms of citrate ions is 1.2-1.4%; the air permeability of the cigarette paper is 46.5-53.5 CU, the coefficient of variation of the air permeability is no more than 5%, and the basis weight is 27.3-28.7 g / m 2 ; The width of the cigarette paper is 26.35 to 26.65 mm;

[0025] The filter rod has a circumference of 23.95 to 24.25 mm. The tow in the filter rod is cellulose acetate tow. The tow has a linear density of 3.48 to 3.62 ktex, a linear density coefficient of variation of ≤0.50, and a single-filament linear density of 2.46 to 2.86 dtex. The pressure drop per 120 mm length of the filter rod is 4600 to 5000 Pa. The triacetin content in the filter rod is 7 to 8%.

[0026] The monitoring cigarette has a mass of 0.91-1.05 g / stick, a circumference of 24.1-24.5 mm, a length of 83.5-84.5 mm, a mouthpiece length of 20 mm, and a connecting width of 30 mm.

[0027] The monitoring cigarettes prepared by the preparation method of the monitoring cigarettes of the present invention have good uniformity in physical, chemical and smoke release properties. The ratio of nicotine release, tar release and carbon monoxide release of the monitoring cigarettes is 1:10:10, and the tar release is 13.9-15.6 mg / cigarette, which meets the requirements of ISO 16055:2019 for "14 mg" conventional monitoring cigarettes. The performance is close to that of CM series monitoring cigarettes with a designed tar release value of 14 mg, and can meet the current tobacco industry testing needs.

[0028] It will be understood that the filter rod comprises a tow and a plug wrapping paper wrapping the tow.

[0029] It is understandable that after the tobacco rod and the filter rod are butt-jointed and laminated by the tipping paper and then cut and segmented, the filter rod portion on each monitoring cigarette is the mouthpiece of the monitoring cigarette.

[0030] Preferably, in the method for preparing medium-tar conventional monitoring cigarettes, the number of tips per tray of tipping paper is ≤1.

[0031] Preferably, in the method for preparing medium-tar conventional monitoring cigarettes, the score length of the tipping paper is 33 mm.

[0032] It is understandable that the cigarette-making machine should comply with the provisions of standard YCT 434.1-2012 "Acceptance of Tobacco Machinery Part 1: Comprehensive Determination of Cigarette Rolling Quality", that is, when tested according to the above standard, the cigarette-making quality score of the cigarette-making machine shall not be less than 85 points.

[0033] Preferably, the cigarette-making machine meets the following conditions: the standard deviation of the mass of 1000 cigarettes drawn from the cigarette-making machine is not higher than 40 mg.

[0034] Preferably, the cigarette making machine is a PROTOS cigarette making machine. Using a PROTOS cigarette making machine can reduce the quality standard deviation of the prepared cigarettes.

[0035] Preferably, during the monitoring of cigarette making process, the amount of waste cigarettes in the PROTOS cigarette making machine is controlled to be 25% to 35%.

[0036] Preferably, in the method for preparing medium-tar conventional monitoring cigarettes, the tow is a high-crimp cellulose acetate tow. High-crimp cellulose acetate tow means a tow with no fewer than 25 crimps, as measured in accordance with the standard "YCT 169.3-2009 Determination of Physical and Chemical Properties of Tobacco Tow - Part 3: Crimping."

[0037] Preferably, in the method for preparing medium-tar conventional monitoring cigarettes, the moisture content of the shredded tobacco is 12.1-13.1%.

[0038] Preferably, in the method for preparing medium-tar conventional monitoring cigarettes, the standard deviation of the filter rod pressure drop is no more than 50 Pa.

[0039] When preparing tobacco rods from cut tobacco, the tobacco can be loaded manually or by air delivery. Manual loading avoids the effects of air delivery on the tobacco's moisture and structure. When using air delivery, the uniformity and stability of the tobacco must be constantly monitored to minimize clumping.

[0040] Preferably, the shredded tobacco is prepared by a method comprising the following steps: sequentially loosening and rehydrating the tobacco leaves, screening and adding materials, storing the leaves, cutting the leaves into shreds, heating and humidifying the leaves, and drying the leaves.

[0041] Preferably, the tobacco leaves are obtained by hand-selection and impurity removal.

[0042] Preferably, the loosening and conditioning is carried out in a tobacco loosening and conditioning machine, and the parameters of the tobacco loosening and conditioning machine are as follows: the conditioning machine drum motor frequency is 25Hz, the return air temperature is 78-82°C, the hot air fan frequency is 38Hz, and the induced water vapor pressure is 0.18-0.22MPa.

[0043] Preferably, the moisture content of the tobacco leaves before loosening and moisture conditioning is 12.68% to 13.45%.

[0044] Preferably, after loosening and rehydration, the moisture content of the tobacco leaves is 20.5% to 22.04%. For example, after loosening and rehydration, the moisture content of the tobacco leaves is 20.55% to 22.04%.

[0045] Preferably, the screening and feeding is to first screen the loose and moistened tobacco leaves, and then convey the screened tobacco leaves into the tobacco drum feeder for feeding.

[0046] Preferably, the device used for screening is a tobacco material screening instrument.

[0047] Preferably, the parameters of the tobacco drum feeder used for screening and feeding are as follows: hot air temperature of 147-153°C, steam pressure of 0.18-0.22 MPa, drum motor frequency of 25 Hz, hot air blower frequency of 45 Hz, and dehumidification damper opening of 35%. In the present invention, no substances are added during the feeding process; tobacco leaves are simply fed into the tobacco drum feeder for heating.

[0048] Preferably, when screening and feeding begin, the moisture content of the tobacco leaves is 18.74% to 19.09%.

[0049] Preferably, after screening and adding the tobacco leaves, the moisture content is 20.0% to 22.0%. For example, after screening and adding the tobacco leaves, the moisture content is 20.92% to 21.74%. Preferably, the tobacco leaves are stored for 2 to 16 hours. For example, the tobacco leaves are stored for 2 hours.

[0050] Preferably, the blade heating and humidification is carried out in a blade heating and humidification machine, the steam pressure in the blade heating and humidification machine is 0.45-0.55 bar, and the steam flow rate is 198.63-201.36 kg / h. For example, the steam flow rate in the blade heating and humidification machine is 200 kg / h.

[0051] Preferably, the shredded leaves are dried using hot air; the temperature of the hot air is 107-113° C., and the wind speed of the hot air is 0.29-0.3 m / s.

[0052] Preferably, the shredded leaves are dried in a tobacco drum dryer, through which hot air is passed.

[0053] Preferably, after the leaf strips are dried, the filament rate of the leaf strips is 60.0%, the whole filament rate is 75.8%, and the broken filament rate is 3.0%. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 Schematic diagram of the mass standard deviations of 20 monitoring cigarette samples selected each time during the production process of Experimental Example 5 and the average value of the mass standard deviations of the selected monitoring cigarette samples;

[0055] Figure 2 A schematic diagram showing the mass standard deviations of 20 monitoring cigarette samples each selected during the production process of CM6 and CM7 monitoring cigarettes and the average value of the mass standard deviations of the selected monitoring cigarette samples; Figure 2In the table, the horizontal axis is the sample number, and the vertical axis is the quality standard deviation. “SD n=20 single values ​​CM7” represents the quality standard deviation of the 20 monitoring cigarette samples selected each time during the production of CM7 monitoring cigarettes. “mean SD CM7” represents the average value of the quality standard deviations of the monitoring cigarette samples selected during the production of CM7 monitoring cigarettes. “SD n=20 single values ​​CM6” represents the quality standard deviation of the 20 monitoring cigarette samples selected each time during the production of CM6 monitoring cigarettes. “mean SD CM6” represents the average value of the quality standard deviations of the monitoring cigarette samples selected during the production of CM6 monitoring cigarettes.

[0056] Figure 3 Schematic diagram of the mass mean values ​​of 20 monitoring cigarette samples selected each time during the production process of Experimental Example 5 and the average value of the mass mean values ​​of the selected monitoring cigarette samples;

[0057] Figure 4 A schematic diagram showing the mass mean values ​​of 20 monitoring cigarette samples selected each time during the production process of CM6 and CM7 monitoring cigarettes and the average value of the mass mean values ​​of the selected monitoring cigarette samples; Figure 4 In the table, the horizontal axis is the sample number, and the vertical axis is the mass. “mean n=20 single values ​​CM7” represents the mass mean of 20 monitoring cigarette samples selected each time during the production of CM7 monitoring cigarettes. “mean blocks of 20 CM7” represents the average of the mass means of the monitoring cigarette samples selected during the production of CM7 monitoring cigarettes. “mean n=20 single values ​​CM6” represents the mass mean of 20 monitoring cigarette samples selected each time during the production of CM6 monitoring cigarettes. “mean blocks of 20 CM6” represents the average of the mass means of the monitoring cigarette samples selected during the production of CM6 monitoring cigarettes.

[0058] Figure 5 Schematic diagram of the mean diameters of 20 monitoring cigarette samples selected each time during the production process of Experimental Example 5 and the average value of the mean diameters of the selected monitoring cigarette samples;

[0059] Figure 6 A schematic diagram showing the mean diameters of 20 monitoring cigarette samples selected each time during the production process of CM6 and CM7 monitoring cigarettes and the average of the mean diameters of the selected monitoring cigarette samples; Figure 6In the table, the horizontal axis is the sample number, the vertical axis is the diameter, “mean n=20 single values ​​CM7” represents the mean diameter of 20 monitoring cigarette samples selected each time during the production of CM7 monitoring cigarettes, “mean blocks of 20 CM7” represents the average of the mean diameters of the monitoring cigarette samples selected during the production of CM7 monitoring cigarettes, “mean n=20 single values ​​CM6” represents the mean diameter of 20 monitoring cigarette samples selected each time during the production of CM6 monitoring cigarettes, and “mean blocks of 20 CM6” represents the average of the mean diameters of the monitoring cigarette samples selected during the production of CM6 monitoring cigarettes;

[0060] Figure 7 This is a schematic diagram showing the average draw resistance values ​​of 20 monitoring cigarette samples selected each time during the production process of Experimental Example 5 and the average value of the average draw resistance values ​​of the selected monitoring cigarette samples;

[0061] Figure 8 A schematic diagram showing the average draw resistance values ​​of 20 monitoring cigarette samples selected each time during the production process of CM6 and CM7 monitoring cigarettes and the average value of the average draw resistance values ​​of the selected monitoring cigarette samples; Figure 8 In the table, the horizontal axis is the sample number, the vertical axis is the draw resistance, “mean n=20 single values ​​CM7” represents the mean draw resistance of 20 monitoring cigarette samples selected each time during the production of CM7 monitoring cigarettes, “mean blocks of 20 CM7” represents the average of the mean draw resistance of the monitoring cigarette samples selected during the production of CM7 monitoring cigarettes, “mean n=20 single values ​​CM6” represents the mean draw resistance of 20 monitoring cigarette samples selected each time during the production of CM6 monitoring cigarettes, and “mean blocks of 20 CM6” represents the average of the mean draw resistance of the monitoring cigarette samples selected during the production of CM6 monitoring cigarettes;

[0062] Figure 9 Schematic diagram of the mean values ​​of mainstream smoke components of 12 cigarette samples (each sample is a cigarette) selected in Experimental Example 5;

[0063] Figure 10 Schematic diagram of the statistical analysis results of the stability test of smoke components of cigarette samples monitored in Experimental Example 8. DETAILED DESCRIPTION

[0064] The technical solution of the present invention will be further described below with reference to specific embodiments.

[0065] 1. Specific examples of conventional monitoring of medium tar cigarettes according to the present invention are as follows:

[0066] Example 1

[0067] The medium-tar conventional monitoring cigarette of this embodiment is made of a mouthpiece and a tobacco rod joined together by tipping paper; the tobacco rod includes tobacco and cigarette paper wrapped around the tobacco; the tobacco is made from tobacco leaves produced in Qujing, and the grade of the tobacco leaves is CX65; the width of the tobacco is 0.85-0.95 mm, and no glycerin is added to the tobacco; the moisture content of the tobacco is 11%-13.5%; the density of the tobacco in the tobacco rod is 255-265 mg / cm 3 Cigarette paper is mainly made of wood pulp, calcium carbonate and potassium citrate; the mass fraction of calcium carbonate in cigarette paper is 30%, and the mass fraction of potassium citrate calculated as citrate ion is 1.2-1.4%; the air permeability of cigarette paper is 46.5-53.5 CU, the coefficient of variation of air permeability is no more than 5%, and the basis weight is 27.3-28.7 g / m 2 ; The width of the cigarette paper is 26.35~26.65mm; the circumference of the mouthpiece is 23.95~24.25mm; the tow in the mouthpiece is cellulose acetate tow; the linear density of the tow is 3.48~3.62Ktex, the linear density coefficient of variation is ≤0.50, and the single-filament linear density is 2.46~2.86dtex; the pressure drop per 120mm long mouthpiece is 4600~5000Pa; the triacetin content in the mouthpiece is 7~8%; the mass of the monitored cigarettes is 0.91~1.05g / piece, the circumference is 24.1~24.5mm, the length is 83.5~84.5mm, the mouthpiece length is 20mm, and the connecting width is 30mm.

[0068] 2. Specific examples of the method for preparing the conventional medium-tar monitoring cigarette of the present invention are as follows:

[0069] Example 2

[0070] The method for preparing the monitoring cigarette of Example 2 includes the following steps: using a cigarette-making machine to butt-join and compound a tobacco rod and a filter rod with tipping paper, and then cutting and segmenting the rods to obtain a monitoring cigarette; the tobacco rod includes tobacco and cigarette paper wrapping the tobacco, and the filter rod includes a tow and wrapping paper wrapping the tow; the cigarette-making machine is a PROTOS cigarette-making machine.

[0071] The width of the tobacco in the tobacco rod is 0.85-0.95 mm, no glycerin is added to the tobacco, the moisture content of the tobacco is 11%-13.5%, and the density of the tobacco in the tobacco rod is 255-265 mg / cm 3 .

[0072] Cigarette paper is mainly made of wood pulp, calcium carbonate and combustion aid; the mass fraction of calcium carbonate in cigarette paper is 30%, the combustion aid is potassium citrate, and the mass fraction of the combustion aid calculated as citrate ion is 1.2-1.4%; the air permeability of cigarette paper is 46.5-53.5CU, the coefficient of variation of air permeability is no more than 5%, and the basis weight is 27.3-28.7g / m 2 ;The width of cigarette paper is 59.85~60.15mm.

[0073] The width of the tipping paper is 59.85~60.15mm, the length of the scoreline is 33mm, and there is ≤1 joint per tray; the fiber structure of the tipping paper is uniform, the paper surface is flat and clean, the color is consistent, the lines are clear and complete, and there are no defects such as discoloration and scratches.

[0074] The length of the filter rod is 119.7 to 120.3 mm, and the circumference is 23.95 to 24.25 mm. In the filter rod, the linear density of the filament tow is 3.48 to 3.62 ktex, the linear density coefficient of variation is ≤0.50, the single filament linear density is 2.46 to 2.86 dtex, and the filament tow is a highly curled cellulose acetate tow. The pressure drop of the filter rod is 4600 to 5000 Pa, and the standard deviation of the pressure drop is no more than 50 Pa. The content of triacetin in the filter rod is 7 to 8%.

[0075] The prepared monitoring cigarettes have a mass of 0.91-1.05 g / cigarette, a circumference of 24.1-24.5 mm, a length of 83.5-84.5 mm, a mouthpiece length of 20 mm, and a connecting width of 30 mm.

[0076] The PROTOS cigarette making machine's process parameters and requirements are as follows: The machine speed is set at 6,000 cigarettes per minute, the waste volume is set at 25% to 35%, and a total of 60 cigarette cases (600,000 cigarettes) are produced. The PROTOS cigarette making machine uses the weight rejection function, a flush cut, and enhanced stem rejection to ensure that the tobacco is stem-free. The process parameters of the PROTOS cigarette making machine were recorded, and the results are shown in Table 1.

[0077] Table 1 Process parameters of PROTOS cigarette making machine

[0078] project unit Record the results Equalizer specifications mm 6 slots, slot depth (3.0mm) Rolling weight g / 20 pieces 19.6 Single weight g / piece 0.98 Speed Support / min 5088 Large fan negative pressure kPa -11.0 Small fan pressure kPa 1.0 Height of baffle mm lowest Secondary wind level side wind opening Row 4 Secondary air distribution bottom air opening grid 5 Record short interest rate ％ 0.29～0.41

[0079] The shredded tobacco is produced by a method comprising the following steps: first, manually selecting tobacco leaves, strictly selecting the stems, and sorting out moldy, green, black, and poor leaves. The selected tobacco leaves are then loosened and moistened, screened and added to the material, stored, cut into shreds, heated and humidified, and finally dried to obtain the shredded tobacco. The shredded tobacco used is graded CX65 and produced in Qujing.

[0080] Loosening and conditioning is performed in a tobacco loosening and conditioning machine. The machine's parameters are as follows: drum motor frequency of 25 Hz, return air temperature of 78-82°C, hot air blower frequency of 38 Hz, and induced water vapor pressure of 0.18-0.22 MPa. Before loosening and conditioning, the moisture content of the tobacco leaves was 12.68%-13.45%. After loosening and conditioning, the moisture content was 20.55%-22.04%.

[0081] The screening and feeding process involves first screening the loose, moistened tobacco leaves using a tobacco material screening instrument. The screened tobacco leaves are then transferred to a tobacco drum feeder for feeding. The parameters of the tobacco drum feeder are as follows: hot air temperature of 147-153°C, steam pressure of 0.18-0.22 MPa, drum motor frequency of 25 Hz, hot air blower frequency of 45 Hz, and damper opening of 35%. At the beginning of screening and feeding, the moisture content of the tobacco leaves is 18.74%-19.09%. After screening and feeding, the moisture content of the tobacco leaves is 20.92%-21.74%. In the present invention, no substances are added during the feeding process; the tobacco leaves are simply fed into the tobacco drum feeder for heating.

[0082] The leaf storage time is 2h.

[0083] The width of the shredded leaves is 0.85 to 0.95 mm, and the sieved material is not mixed back before shredding.

[0084] The blades are heated and humidified in a heating and humidifying machine. The machine parameters are as follows: a steam pressure of 0.45 to 0.55 bar and a steam flow rate of 200 kg / h. At the start of heating and humidification, the blades have a moisture content of 19.27% ​​to 19.36%.

[0085] The tobacco leaves are dried in a tobacco drum dryer, which is ventilated with hot air at a temperature of 107-113°C, a velocity of 0.29-0.3 m / s, and a drum speed of 10 rpm. After drying, the leaves have a moisture content of 12.1-13.1%, a filament fraction of 60.0%, a whole filament fraction of 75.8%, and a broken filament fraction of 3.0%.

[0086] Comparative Example 1

[0087] The only difference between the preparation method of the monitoring cigarette of this comparative example and the preparation method of the monitoring cigarette of Example 2 is that the cigarette production equipment used in this comparative example is a Passim cigarette making machine.

[0088] Comparative Example 2

[0089] The difference between the preparation method of the monitoring cigarette of this comparative example and the preparation method of the monitoring cigarette of comparative example 1 is that the filter rod pressure drop is 3800Pa, the mass fraction of the combustion aid in the cigarette paper is 1.0% in terms of citrate ions, the air permeability of the cigarette paper is 40CU, and the basis weight is 32g / m 2 .

[0090] Comparative Example 3

[0091] The difference between the preparation method of the monitoring cigarette of this comparative example and the preparation method of the monitoring cigarette of comparative example 1 is that the filter rod pressure drop is 3800Pa, the mass fraction of the combustion aid in the cigarette paper is 1.0% in terms of citrate ions, the air permeability of the cigarette paper is 40CU, and the basis weight is 28g / m 2 .

[0092] Comparative Example 4

[0093] The difference between the preparation method of the monitoring cigarette of this comparative example and the preparation method of the monitoring cigarette of comparative example 1 is that the filter rod pressure drop is 3800Pa, the mass fraction of the combustion aid in the cigarette paper is 1.0% in terms of citrate ions, the air permeability of the cigarette paper is 40CU, and the basis weight is 32g / m 2 The tobacco leaves used to prepare the tobacco were CJ51 grade tobacco leaves produced in Qianxinan in 2014.

[0094] Comparative Example 5

[0095] The difference between the preparation method of the monitoring cigarette of this comparative example and the preparation method of the monitoring cigarette of comparative example 1 is that the filter rod pressure drop is 3800Pa, the mass fraction of the combustion aid in the cigarette paper is 1.0% in terms of citrate ions, the air permeability of the cigarette paper is 40CU, and the basis weight is 28g / m 2 The tobacco leaves used to prepare the tobacco were CJ51 grade tobacco leaves produced in Qianxinan in 2014.

[0096] Comparative Example 6

[0097] The difference between the preparation method of the monitoring cigarette of this comparative example and the preparation method of the monitoring cigarette of comparative example 1 is that the filter rod pressure drop is 3800Pa, the mass fraction of the combustion aid in the cigarette paper is 1.0% in terms of citrate ions, the air permeability of the cigarette paper is 40CU, and the basis weight is 32g / m 2 The tobacco leaves used to prepare the tobacco were CA23 grade tobacco leaves produced in Lincang in 2013.

[0098] Comparative Example 7

[0099] The difference between the preparation method of the monitoring cigarette of this comparative example and the preparation method of the monitoring cigarette of comparative example 1 is that the filter rod pressure drop is 3800Pa, the mass fraction of the combustion aid in the cigarette paper is 1.0% in terms of citrate ions, the air permeability of the cigarette paper is 40CU, and the basis weight is 28g / m 2 The tobacco leaves used to prepare the tobacco were CA23 grade tobacco leaves produced in Lincang in 2013.

[0100] Comparative Example 8

[0101] The difference between the preparation method of the monitoring cigarette of this comparative example and the preparation method of the monitoring cigarette of comparative example 1 is that the filter rod pressure drop is 3800Pa, the mass fraction of the combustion aid in the cigarette paper is 1.0% in terms of citrate ions, the air permeability of the cigarette paper is 40CU, and the basis weight is 32g / m 2 The tobacco leaves used to prepare the tobacco were CX35 grade tobacco leaves produced in Bijie in 2013.

[0102] Comparative Example 9

[0103] The difference between the preparation method of the monitoring cigarette of this comparative example and the preparation method of the monitoring cigarette of comparative example 1 is that the filter rod pressure drop is 3800Pa, the mass fraction of the combustion aid in the cigarette paper is 1.0% in terms of citrate ions, the air permeability of the cigarette paper is 40CU, and the basis weight is 28g / m 2 The tobacco leaves used to prepare the tobacco were CX35 grade tobacco leaves produced in Bijie in 2013.

[0104] Comparative Example 10

[0105] The difference between the preparation method of the monitoring cigarette of this comparative example and the preparation method of the monitoring cigarette of comparative example 1 is that the filter rod pressure drop is 3800Pa, the mass fraction of the combustion aid in the cigarette paper is 1.0% in terms of citrate ions, the air permeability of the cigarette paper is 40CU, and the basis weight is 32g / m 2 The tobacco leaves used to prepare the tobacco were B043 grade tobacco leaves produced in Lijiang in 2014.

[0106] Comparative Example 11

[0107] The difference between the preparation method of the monitoring cigarette of this comparative example and the preparation method of the monitoring cigarette of comparative example 1 is that the filter rod pressure drop is 3800Pa, the mass fraction of the combustion aid in the cigarette paper is 1.0% in terms of citrate ions, the air permeability of the cigarette paper is 40CU, and the basis weight is 28g / m 2 The tobacco leaves used to prepare the tobacco were B043 grade tobacco leaves produced in Lijiang in 2014.

[0108] Comparative Example 12

[0109] The only difference between the preparation method of the monitoring cigarette of this comparative example and the preparation method of the monitoring cigarette of comparative example 1 is that the mass fraction of the combustion aid in the cigarette paper is 1.5% in terms of citrate ions.

[0110] Comparative Example 13

[0111] The preparation method of the monitoring cigarette of this comparative example differs from that of the monitoring cigarette of comparative example 1 only in that the mass fraction of the combustion aid in the cigarette paper is 1.5% in terms of citrate ions, and the tobacco leaves used in preparing the cut tobacco are CA23 grade tobacco leaves produced in Lincang in 2013.

[0112] Comparative Example 14

[0113] The only difference between the preparation method of the monitoring cigarettes in this comparative example and the preparation method of the monitoring cigarettes in Comparative Example 1 is that the corresponding score length of the tipping paper used in this comparative example is 28 mm, that is, the width of the tipping paper is adjusted from 59.85-60.15 mm to 50 mm, and the tipping width is adjusted from 30 mm to 25 mm.

[0114] Comparative Example 15

[0115] The only difference between the preparation method of the monitoring cigarette of this comparative example and the preparation method of the monitoring cigarette of Comparative Example 1 is that the mass fraction of the combustion aid in the cigarette paper used in this comparative example is 0.7% in terms of citrate ions.

[0116] Comparative Example 16

[0117] The only difference between the preparation method of the monitoring cigarette of this comparative example and the preparation method of the monitoring cigarette of Comparative Example 1 is that the mass fraction of the combustion aid in the cigarette paper used in this comparative example is 1.0% in terms of citrate ions.

[0118] Comparative Example 17

[0119] The only difference between the preparation method of the monitoring cigarette of this comparative example and the preparation method of the monitoring cigarette of Comparative Example 1 is that the mass fraction of the combustion aid in the cigarette paper used in this comparative example is 1.5% in terms of citrate ions.

[0120] Comparative Example 18

[0121] The difference between the preparation method of the monitoring cigarette of this comparative example and the preparation method of the monitoring cigarette of comparative example 1 is that the mass fraction of the combustion aid in the cigarette paper used in this comparative example is 1.0% in terms of citrate ion, and the quantitative value is 32g / m 2 .

[0122] Comparative Example 19

[0123] The difference between the preparation method of the monitoring cigarette of this comparative example and the preparation method of the monitoring cigarette of comparative example 1 is that the mass fraction of the combustion aid in the cigarette paper used in this comparative example is 1.5% in terms of citrate ion, and the quantitative value is 32g / m 2 .

[0124] Comparative Example 20

[0125] The preparation method of the monitoring cigarette of this comparative example differs from that of the monitoring cigarette of Comparative Example 1 only in that the mass fraction of the combustion aid in the cigarette paper used in this comparative example is 1.0% in terms of citrate ions, and the air permeability of the cigarette paper is 40 CU.

[0126] Comparative Example 21

[0127] The difference between the preparation method of the monitoring cigarette of this comparative example and the preparation method of the monitoring cigarette of comparative example 1 is that the mass fraction of the combustion aid in the cigarette paper used in this comparative example is 1.5% in terms of citrate ion, the air permeability of the cigarette paper is 40CU, and the basis weight is 32g / m 2 .

[0128] Experimental Example 1

[0129] A comparison of the circumference and mass of 1,000 cigarettes prepared in Example 2 and Comparative Example 1, respectively, was conducted on the production line. The cigarettes prepared in Comparative Example 1 exhibited a significant difference in the mean circumference, but this could be addressed through machine adjustments. Furthermore, the unit weight of the cigarettes prepared in Comparative Example 1 exhibited an offset, which could be adjusted to the target value of approximately 0.980 g after adjustments. However, the standard deviation of the unit weight exceeded 20 mg, making this issue difficult to address. However, the circumference and unit weight of the cigarettes prepared in Example 2 met the requirements.

[0130] Experimental Example 2

[0131] To investigate the effect of tobacco leaf type on the physical properties of cigarettes and the composition of mainstream smoke, the monitoring cigarettes prepared in Comparative Examples 2-11 were tested for mass, length, circumference, draw resistance, end-to-end tobacco fall, and hardness. The cigarettes prepared in Comparative Examples 2-13 were also tested for total particulate matter, tar release, CO release, nicotine release, moisture content, and number of puffs in the mainstream smoke during combustion. The test results are shown in Tables 2 and 3.

[0132] Table 2 Test results of the quality, length, circumference, draw resistance, end-of-line condition and hardness index of the monitored cigarettes prepared in Comparative Examples 2-11

[0133]

[0134]

[0135] Table 3 Total particulate matter, tar release, CO release, nicotine release, moisture content and number of puffs of mainstream smoke of the monitored cigarettes prepared in Comparative Examples 2-13

[0136]

[0137] The results showed that the compatibility of tar, nicotine and CO release in mainstream smoke of cut tobacco prepared from tobacco leaves produced in Qujing was relatively the best.

[0138] Experimental Example 3

[0139] To investigate the effect of the corresponding score length of the tipping paper on the composition of mainstream cigarette smoke, the total particulate matter, tar release, CO release, nicotine release, moisture content, and number of puffs in the mainstream smoke of the cigarettes prepared in Comparative Examples 1 and 14 were tested during combustion in accordance with the requirements of GB / T 19609-2004 "Cigarettes - Determination of Total Particulate Matter and Tar Using a Conventional Analytical Smoking Machine", GB / T 23356-2009 "Cigarette Smoke - Determination of Carbon Monoxide in the Gas Phase - Non-scattering Infrared Method", GB / T 23203.1 "Determination of Water in the Total Particulate Matter of Cigarettes - Part 1: Gas Chromatography", and GB / T 23355 "Determination of Nicotine in the Total Particulate Matter of Cigarettes - Gas Chromatography". The average weight of the cigarettes prepared in Comparative Examples 1 and 14 was also tested (the total number of cigarettes tested in each comparative example was 100). The experimental results are shown in Table 4.

[0140] Table 4 Average weight, total particulate matter in smoke, tar release, CO release, nicotine release, moisture content and number of puffs of the monitored cigarettes prepared in Comparative Example 1 and Comparative Example 14

[0141]

[0142] The results show that the test results of the monitoring cigarettes with a line length of 33mm and 28mm are quite different, especially the tar release in the last few puffs is relatively large and exceeds the average value of the puffs. Therefore, the line length of 33mm was selected to reduce the tar release.

[0143] Experimental Example 4

[0144] To investigate the effects of cigarette paper parameters on mainstream cigarette smoke composition, the total particulate matter, tar yield, CO yield, nicotine yield, moisture, and puff count of mainstream smoke from the cigarettes prepared in Comparative Examples 15-21 were tested during combustion according to the requirements of GB / T 19609-2004 "Cigarettes - Determination of total particulate matter and tar using a conventional analytical smoking machine," GB / T 23356-2009 "Cigarette smoke - Determination of carbon monoxide in the gas phase - Non-scattering infrared method," GB / T 23203.1 "Cigarette - Determination of moisture in total particulate matter - Part 1: Gas chromatography," and GB / T 23355 "Cigarette - Determination of nicotine in total particulate matter - Gas chromatography." The experimental results are shown in Table 5.

[0145] Table 5 Total particulate matter, tar release, CO release, nicotine release, moisture content and number of puffs of the monitored cigarette smoke prepared in Comparative Examples 15-21

[0146]

[0147] Note: Tar: Nicotine: CO represents the ratio of tar release, nicotine release and CO release in smoke.

[0148] The results showed that the monitoring cigarettes prepared in Comparative Examples 16 and 17 had a puff count close to 8.00, tar yields above 14 mg / citrate, and a ratio of tar, nicotine, and CO yields equal to or close to 10:1.0:10.0, which are close to the indicators recommended in ISO 16055, "Requirements and Applications for Monitoring Cigarettes for Tobacco and Tobacco Products." Therefore, the air permeability of cigarette paper and the mass fraction of the combustion aid in cigarette paper both affect the composition of mainstream cigarette smoke. Ultimately, the air permeability of cigarette paper was controlled at approximately 50 CU, and the mass fraction of the combustion aid in cigarette paper (calculated as citrate ions) was controlled at approximately 1.3%.

[0149] Experimental Example 5

[0150] In order to investigate the quality fluctuations during the rolling process, in the preparation method of the monitoring cigarettes of Example 2, samples were taken every 2 minutes, 60 times, and 20 cigarettes were sampled each time. The comprehensive test bench of Cerulean Company was used to test the mean and standard deviation of the six physical parameters of mass, length, circumference, draw resistance, ventilation rate, and hardness of each sample. The test results of the mean and standard deviation of the mass, circumference and length of the monitoring cigarettes selected during the production process are shown in Table 6, and the test results of the mean and standard deviation of the draw resistance, ventilation rate and hardness of the monitoring cigarettes are shown in Table 7. A schematic diagram of the quality standard deviation of the 20 monitoring cigarette samples selected each time during the production process and the average value of the quality standard deviation of the selected monitoring cigarette samples is shown in Figure 1As shown in FIG, a schematic diagram of the mass mean of 20 monitoring cigarette samples selected each time during the production process and the average of the mass mean of the selected monitoring cigarette samples is shown in FIG. Figure 3 As shown in FIG, a schematic diagram of the mean diameter of 20 monitoring cigarette samples selected each time during the production process and the average value of the mean diameter of the selected monitoring cigarette samples is shown in FIG. Figure 5 As shown in FIG, the average draw resistance of 20 monitoring cigarette samples selected each time during the production process and the average value of the average draw resistance of the selected monitoring cigarette samples are shown in FIG. Figure 7 shown.

[0151] Table 6 Mean and standard deviation of mass, circumference and length of monitored cigarettes

[0152]

[0153]

[0154] Table 7 Mean and standard deviation of draw resistance, ventilation rate and hardness of monitored cigarettes

[0155]

[0156]

[0157] The results showed that the mean standard deviation of the mass of the 14 mg conventional monitoring cigarettes prepared in Example 2 was 18.5 mg, which was consistent with the results provided by the international tobacco research organization CORESTA (such as Figure 2 Compared to the standard deviations for the 14mg conventional monitoring cigarettes prepared in Example 2 (shown in Figure 2), the mean standard deviation for the mass of the 14mg conventional monitoring cigarettes was less than that of the CM7 cigarettes (approximately 19.5mg) and greater than that of the CM6 cigarettes (approximately 17.5mg). The maximum mass deviation for the 20 conventional monitoring cigarettes was 25mg, occurring once. However, results provided by CORESTA, the international tobacco research organization, showed that the maximum mass deviation for the CM7 cigarettes was 26mg, occurring twice, and the maximum mass deviation for the CM6 cigarettes was 26mg, occurring once.

[0158] The average mass value of the 14mg conventional monitoring cigarettes prepared in Example 2 is 975.945mg. The results provided by the International Tobacco Research Organization CORESTA (such as Figure 4 The mean mass of the CM7 cigarettes was approximately 981 mg, and the mean mass of the CM6 cigarettes was approximately 983 mg. The fluctuations in the mean mass of the 20 monitoring cigarette samples selected during the preparation of Example 2 were similar to those in the CM7 and CM6 cigarettes.

[0159] The average diameter of the 14mg conventional monitoring cigarettes prepared in Example 2 is 7.71mm. The results provided by the international tobacco research organization CORESTA (such as Figure 6 The mean diameters of the CM7 cigarettes were approximately 7.81 mm, and the mean diameters of the CM6 cigarettes were approximately 7.80 mm. The fluctuations in the mean diameters of the 20 monitoring cigarette samples taken during the preparation of Example 2 were similar to those of the 20 monitoring cigarette samples taken during the preparation of CM7 and CM6.

[0160] The average value of the draw resistance of the 14 mg conventional monitoring cigarette prepared in Example 2 is 1308.8 Pa. The results provided by CORESTA, an international tobacco research organization (eg Figure 8 The average draw resistance of the CM7 cigarettes was approximately 1427 Pa (145.5 mmH2O), and the average draw resistance of the CM6 cigarettes was approximately 1393 Pa (142.0 mmH2O). Furthermore, the fluctuations in the average draw resistance of the 20 monitoring cigarette samples selected during each preparation of Example 2 were similar to those of the 20 monitoring cigarette samples selected during each preparation of CM7 and CM6.

[0161] In order to further verify the stability of the smoke composition of the finished cigarettes, 5 cigarettes were taken every 20 minutes during the production process, for a total of 6 times. Then, 2 cigarettes were selected from the 5 cigarettes each time as parallel samples, for a total of 12 parallel samples. Finally, a rotary smoking machine was used to test the mainstream smoke parameters. The test results are shown in Table 8 and Figure 9 shown.

[0162] Table 8 Test results of number of puffs and mainstream smoke components of monitored cigarette samples

[0163]

[0164] The results showed that the tar, nicotine, and carbon monoxide releases in the mainstream smoke of the monitored cigarettes showed little fluctuation, demonstrating the stability of the processing. They also verified the good compatibility of tar, carbon monoxide, and nicotine releases, particularly the compatibility of tar and carbon monoxide. Although the maximum tar release reached 15.1 mg, this may be due to errors in a single experiment.

[0165] In summary, through monitoring the physical parameters of cigarettes and the test results of mainstream smoke components, it can be seen that the production process of medium-tar conventional monitoring cigarettes can meet the relevant requirements.

[0166] Experimental Example 6

[0167] The uniformity of the prepared monitoring cigarettes was tested and analyzed with reference to the provisions of GB / T 15000.3-2008 "Guidelines for Standard Samples (3) General Principles and Statistical Methods for Determining the Value of Standard Samples" and JJF 1343-2012 "General Principles and Statistical Principles for Determining the Value of Reference Materials." During the test and analysis, when the total sample volume is greater than 1000, no less than 30 samples should be drawn. The total number of monitoring cigarettes is 3000 cartons (60 pieces). 30 pieces (boxes) are randomly drawn from the total sample of 60 pieces (boxes). Then, from the selected 30 pieces (boxes), sampling is carried out according to the standard of drawing one cigarette from each box. Finally, from the 30 drawn cigarettes, three boxes of cigarettes are randomly drawn from each carton. The samples are numbered in the form of "carton number + box number" and then the selected samples are used for smoke analysis.

[0168] Test samples were equilibrated according to the requirements of GB / T 16447, with an equilibration time of no less than 48 hours but no more than 10 days. Using a rotary smoking machine (20 cigarettes smoked per filter), the mainstream smoke of the cigarette samples was tested for tar, CO, nicotine release, and the number of puffs during combustion in accordance with GB / T 19609-2004 "Cigarettes - Determination of Total Particulate Matter and Tar Using a Conventional Analytical Smoking Machine," GB / T 23356-2009 "Cigarette Smoke - Determination of Carbon Monoxide in the Gas Phase - Non-scattered Infrared Method," and GB / T 23355 "Cigarette - Determination of Nicotine in the Total Particulate Matter - Gas Chromatographic Method." Tar, CO, and nicotine release are expressed in mg / cigarette, while puffs are expressed in puffs / cigarette. According to GB / T 15000.3-2008 “Guidelines for the determination of reference materials (3) General principles and statistical methods for the determination of reference materials” and JJF 1343-2012 “General principles and statistical principles for the determination of reference materials”, the test results were analyzed and the uniformity of the test results was determined.

[0169] The test results of the tar release and uniformity of mainstream smoke during the combustion of monitored cigarette samples are shown in Tables 9-10.

[0170] Table 9: Tar release in mainstream smoke during combustion of monitored cigarette samples (mg / cigarette)

[0171]

[0172]

[0173] Table 10 Test results of uniformity of tar release in mainstream smoke during combustion of monitored cigarette samples

[0174]

[0175] The results show that in the uniformity test result of the tar release of cigarette samples, F test = 1.101, which is less than the critical value of 1.656, indicating that the uniformity of the tar release of mainstream smoke during the combustion process of the samples is good.

[0176] The test results of nicotine release and uniformity in mainstream smoke during the combustion of monitored cigarette samples are shown in Tables 11-12.

[0177] Table 11 Nicotine release in mainstream smoke during combustion of monitored cigarette samples (mg / cigarette)

[0178]

[0179]

[0180] Table 12 Test results of uniformity of nicotine release in mainstream smoke during combustion of monitored cigarette samples

[0181]

[0182] The results showed that F test = 1.353, which is less than the critical value of 1.656, indicating that the nicotine release in the mainstream smoke during the combustion of the sample is well uniform.

[0183] The test results of carbon monoxide release and uniformity in mainstream smoke during the combustion of monitored cigarette samples are shown in Tables 13-14.

[0184] Table 13 Carbon monoxide release in mainstream smoke during combustion of monitored cigarette samples (mg / cigarette)

[0185]

[0186]

[0187] Table 14 Uniformity test results of carbon monoxide release in mainstream smoke during combustion of monitored cigarette samples

[0188]

[0189] The results show that F is 0.510, which is less than the critical value of 1.656, indicating that the carbon monoxide release in the mainstream smoke during the combustion of the sample is well uniform.

[0190] The results of the monitoring of the number of puffs of cigarette samples and their uniformity test are shown in Tables 15-16.

[0191] Table 15 Number of puffs of monitored cigarette samples (puffs / stick)

[0192]

[0193]

[0194] Table 16 Uniformity test results of the number of puffs of monitored cigarette samples

[0195]

[0196] The results show that F-test = 0.702, which is less than the critical value of 1.656, indicating that the uniformity of the number of puffs in the sample is good.

[0197] Experimental Example 7

[0198] In accordance with GB / T 6379.2-2004, "Accuracy (Trueness and Precision) of Measurement Methods and Results - Part 2: Basic Methods for Determining the Repeatability and Reproducibility of Standard Measurement Methods," 24 laboratories jointly tested the monitoring cigarettes prepared in Example 2 using the same analytical method for quality, puff count, total particulate matter, tar, carbon monoxide, nicotine, and water release. The average of the results measured by each laboratory was designated as the standard value (fixed value). Each laboratory was required to select one or more smoking machines of various models (both linear and rotary) for the joint experiment. The China Tobacco Standardization Research Center distributed samples based on the number of smoking machines provided by each laboratory, with three sample cartons per machine. During the experiment, one carton was drawn as a sample. From this sample, 100 cigarettes were selected as the test cigarette sample group (excluding those with obvious defects). These were balanced according to the requirements of GB / T 16447. The cigarette samples for each test were randomly selected from the balanced cigarette sample group. Two remaining cigarettes were kept as backup samples.

[0199] The cigarette samples were then smoked using a linear smoking machine and a rotating disc smoking machine. Before testing, the smoking machine should be checked to ensure that it meets the requirements of GB / T 16450-2004, "Definitions and Standard Conditions for Smoking Machines for Routine Analytical Use." The total weight of the 20 cigarettes to be tested (after balancing) should be recorded before each smoking session. Each test cigarette sample group consisted of 100 cigarettes. Each test cigarette sample group was divided into five groups, each smoked over five separate days. The smoking schedules for the linear smoking machine (20 and 16 holes) and the rotating disc smoking machine were followed according to the protocols in Tables 17-19.

[0200] Table 17 Smoking plan of 20-hole linear smoking machine

[0201]

[0202] Note: M1 means that the corresponding hole is used for suction, - means that the corresponding hole is not used for suction.

[0203] Table 18 Smoking plan of 16-hole linear smoking machine

[0204]

[0205] Note: M1 means that the corresponding hole is used for suction, - means that the corresponding hole is not used for suction.

[0206] Table 19 Rotary Smoking Machine Smoking Scheme

[0207]

[0208] Note: M1 means that the corresponding rounds of suction are used, and - means that the corresponding rounds of suction are not used.

[0209] If the calibration unit (laboratory) has both linear smoking machines and rotary smoking machines, it should conduct tests and report the results on the two smoking machines separately. Each smoking machine involved in the experiment should be assigned a fixed operator. The linear smoking machine smokes 5 cigarettes per channel (each sample smokes 4 channels per round, a total of 20 cigarettes), and provides one test result; the rotary smoking machine provides one test result per filter (smoking 20 cigarettes). The units of the total particulate matter, tar release, carbon monoxide release, nicotine release and water release of the smoke obtained from the test are mg / cigarette, the unit of the number of puffs obtained from the test is puffs / cigarette, and the unit of the adjusted mass of 20 cigarettes (after adjusting the balance, the mass of the 20 cigarettes to be smoked on the machine is weighed on a balance) is g / 20 cigarettes. Among them, the total particulate matter and tar emissions are tested in accordance with GB / T 19609-2004 "Cigarettes - Determination of total particulate matter and tar using a conventional analytical smoking machine", the carbon monoxide emissions are tested in accordance with GB / T 23356-2009 "Cigarette smoke - Determination of carbon monoxide in the gas phase - Non-scattering infrared method", the nicotine emissions are tested in accordance with GB / T 23355 "Cigarette total particulate matter - Determination of nicotine - Gas chromatography method", and the moisture content in the total particulate matter is tested in accordance with GB / T 23203.1 "Cigarette total particulate matter - Determination of moisture - Part 1: Gas chromatography method".

[0210] A total of 24 laboratories participated in the experiment, and the feedback data results were 25 groups (22 groups of data were obtained by rotating smoking machine testing, and 3 groups of data were obtained by linear smoking machine testing). Referring to the CM series monitoring cigarette calibration process published by CORESTA, the outliers in the test results were eliminated in accordance with the GB / T 6379 "Results and Accuracy of Measurement Methods" series of standards. Then, the retained data after eliminating the outliers were summarized and calculated in accordance with the GB / T 6379 "Results and Accuracy of Measurement Methods" series of standards. The mean value of the standard deviation (SD) of the quality between groups was 3.70mg, and the calibration results and reproducibility standard deviation S r , repeatability limit r, reproducibility standard deviation S R The reproducibility limit R is shown in Table 20.

[0211] Table 20 Summary of fixed values

[0212]

[0213] The results show that the reproducibility standard deviation S of the number of puffs, tar release, nicotine release and carbon monoxide release of the monitoring cigarette prepared by the present invention is r The performance of the three-group quality standard deviation (SD) and the mean value of the inter-group quality standard deviation (SD) were good, which was comparable with the CM monitoring cigarettes and could be used to monitor the whole process of smoke analysis.

[0214] Experimental Example 8

[0215] Cigarette stability testing was carried out with reference to GB / T 15000.3-2008 “Guidelines for Standard Samples (3) General Principles and Statistical Methods for the Determination of the Value of Standard Samples” and JJF 1343-2012 “General Principles and Statistical Principles for the Determination of the Value of Reference Materials”.

[0216] First, 25 samples were taken and then placed in a van for an 8-hour transportation test on ordinary roads. Then, 3 samples were randomly selected from the samples after the transportation test and sent to the laboratory for the first stability test. At the same time, the remaining 22 samples (not subjected to the first stability test) were first placed in a 4°C environment for 72 hours, and then placed in a 35°C environment for 72 hours (simulating temperature changes in the transportation environment), and then placed in a conventional storage environment. Four months after the first test, 3 samples were randomly selected from the 22 samples for the second stability test. Finally, seven months after the first test, 3 samples were randomly selected from the remaining samples (19) for the third stability test.

[0217] During each stability test, 100 cigarettes were randomly selected from the three selected cigarette samples and tested in the same laboratory. The stability test method is as follows: First, the test sample is equilibrated in accordance with the requirements of GB / T 16447. The equilibration time should be no less than 48 hours but no more than 10 days. Then, the mainstream smoke tar yield (mg / cigarette), CO yield (mg / cigarette), nicotine yield (mg / cigarette), and number of puffs (puffs / cigarette) of the test sample during combustion are measured using a smoking machine in accordance with the requirements of GB / T 19609-2004 "Cigarettes - Determination of Total Particulate Matter and Tar Using a Smoking Machine for Conventional Analytical Use," GB / T 23356-2009 "Determination of Carbon Monoxide in Cigarette Smoke - Gas Phase - Non-scattering Infrared Method," and GB / T 23355 "Determination of Nicotine in Total Particulate Matter - Gas Chromatographic Method." During each smoke test, the laboratory temperature and relative humidity should be checked and recorded to ensure that the smoking machine meets the requirements of GB / T 16450-2004, "Definition and Standard Conditions for Routine Analytical Smoking Machines." The smoking machine involved in the experiment should be stationary, and the operator should be stationary. The test results are shown in Tables 21-24.

[0218] Table 21 Mainstream smoke tar release during combustion of the tested samples in the stability test (mg / cigarette)

[0219]

[0220] Table 22 Nicotine release in mainstream smoke during combustion of the tested samples in the stability test (mg / cigarette)

[0221]

[0222] Table 23 Mainstream smoke CO release during combustion of the tested samples in the stability test (mg / stick)

[0223]

[0224] Table 24 Number of puffs of the samples to be tested in the stability test (puffs / stick)

[0225]

[0226] According to the requirements of JJF1343-2012, since there is no accurate model that can reflect the actual change pattern of cigarette smoke components, the linear model is selected as the empirical model. The statistical analysis results of the smoke component stability test of the tested samples are shown in Table 25 and Figure 10 shown.

[0227] Table 25 Statistical analysis results of the stability test of smoke components of monitored cigarettes prepared in Example 2

[0228]

[0229]

[0230] The results show that the stability test is effective for the tar, nicotine, CO and number of puffs of the tested samples. All of the above were established, and no instability was observed, that is, there was no significant difference in the number of cigarette puffs, tar, nicotine in smoke, and carbon monoxide release in smoke during the experimental period, and the sample had good stability.

Claims

1. A medium tar conventional monitoring cigarette, characterized in that: It is formed by butting a mouthpiece and a tobacco rod together through tipping paper; the tobacco rod includes tobacco and cigarette paper wrapping the tobacco; The shredded tobacco is made from tobacco leaves produced in Qujing, and the grade of the tobacco leaves is CX65; The width of the tobacco is 0.85-0.95 mm, and no glycerin is added to the tobacco; the moisture content of the tobacco is 11%-13.5%; the density of the tobacco in the tobacco rod is 255-265 mg / cm 3 ; The cigarette paper is mainly made of wood pulp, calcium carbonate and potassium citrate; the mass fraction of calcium carbonate in the cigarette paper is 30%, and the mass fraction of potassium citrate in terms of citrate ions is 1.2-1.4%; the air permeability of the cigarette paper is 46.5-53.5 CU, the coefficient of variation of the air permeability is no more than 5%, and the basis weight is 27.3-28.7 g / m 2 ; The width of the cigarette paper is 26.35~26.65mm; The circumference of the nozzle rod is 23.95-24.25 mm; the filaments in the nozzle rod are cellulose acetate filaments; the linear density of the filaments is 3.48-3.62 ktex, the coefficient of variation of the linear density is ≤0.50, and the linear density of the single filament is 2.46-2.86 dtex; the pressure drop per 120 mm length of the nozzle rod is 4600-5000 Pa; the triacetin content in the nozzle rod is 7-8%; The monitoring cigarette has a mass of 0.91-1.05 g / stick, a circumference of 24.1-24.5 mm, a length of 83.5-84.5 mm, a mouthpiece length of 20 mm, and a connecting width of 30 mm.

2. A method for preparing medium-tar conventional monitoring cigarettes, characterized in that: The following steps are involved: A cigarette making machine is used to butt-join and compound a tobacco rod and a filter rod through tipping paper, and then cut and segment them to obtain a monitoring cigarette; the tobacco rod includes tobacco and cigarette paper wrapping the tobacco; The shredded tobacco is made from tobacco leaves produced in Qujing, and the grade of the tobacco leaves is CX65; The width of the tobacco is 0.85-0.95 mm, and no glycerin is added to the tobacco; the moisture content of the tobacco is 11%-13.5%; the density of the tobacco in the tobacco rod is 255-265 mg / cm 3 ; The cigarette paper is mainly made of wood pulp, calcium carbonate and potassium citrate; the mass fraction of calcium carbonate in the cigarette paper is 30%, and the mass fraction of potassium citrate in terms of citrate ions is 1.2-1.4%; the air permeability of the cigarette paper is 46.5-53.5 CU, the coefficient of variation of the air permeability is no more than 5%, and the basis weight is 27.3-28.7 g / m 2 ; The width of the cigarette paper is 26.35~26.65mm; The filter rod has a circumference of 23.95 to 24.25 mm. The tow in the filter rod is cellulose acetate tow. The tow has a linear density of 3.48 to 3.62 ktex, a linear density coefficient of variation of ≤0.50, and a single-filament linear density of 2.46 to 2.86 dtex. The pressure drop per 120 mm length of the filter rod is 4600 to 5000 Pa. The triacetin content in the filter rod is 7 to 8%. The monitoring cigarette has a mass of 0.91-1.05 g / stick, a circumference of 24.1-24.5 mm, a length of 83.5-84.5 mm, a mouthpiece length of 20 mm, and a connecting width of 30 mm.

3. The method for preparing medium-tar conventional monitoring cigarettes according to claim 2, characterized in that: The cigarette making machine is a PROTOS cigarette making machine.

4. The method for preparing medium-tar conventional monitoring cigarettes according to claim 2 or 3, characterized in that: The shredded tobacco is prepared by a method comprising the following steps: sequentially loosening and rehumidifying tobacco leaves, feeding the leaves into a tobacco drum feeder for heating treatment, storing the leaves, cutting the leaves into shreds, heating and humidifying the leaves, and drying the leaves.

5. The method for preparing medium-tar conventional monitoring cigarettes according to claim 4, characterized in that: After loosening and rehydration, the moisture content of tobacco leaves is 20.5%~22.04%.

6. The method for preparing medium-tar conventional monitoring cigarettes according to claim 4, characterized in that: After being sent into the tobacco drum feeder for heating treatment, the moisture content of the tobacco leaves is 20.0%~22.0%.

7. The method for preparing medium-tar conventional monitoring cigarettes according to claim 4, characterized in that: The leaf storage time is 2 to 16 hours.

8. The method for preparing medium-tar conventional monitoring cigarettes according to claim 4, characterized in that: The blade heating and humidification is carried out in a blade heating and humidification machine, the steam pressure in the blade heating and humidification machine is 0.45-0.55 bar, and the steam flow rate is 198.63-201.36 kg / h.

9. The method for preparing medium-tar conventional monitoring cigarettes according to claim 4, characterized in that: The shredded leaves are dried using hot air; the temperature of the hot air is 107-113° C., and the wind speed of the hot air is 0.29-0.3 m / s.

10. The method for preparing medium-tar conventional monitoring cigarettes according to claim 4, characterized in that: After the leaf silk was dried, the filament rate was 60.0%, the whole silk rate was 75.8%, and the broken silk rate was 3.0%.

Images