Testing and evaluation methods for blending ratio and blending uniformity of cut tobacco in cigarette formula

Abstract

The present invention belongs to the field of tobacco processing, and discloses a method for detecting and evaluating the blending ratio and blending uniformity of formula tobacco shreds of cigarettes, so as to detect the blending ratio and blending uniformity of formula tobacco shreds. The method adds markers to expanded tobacco shreds and stem shreds respectively, and further calculates the proportion of the three components of leaf shreds, expanded tobacco shreds and stem shreds in the formula tobacco shreds by measuring the proportion of the markers in the formula tobacco shreds, and characterizes the uniformity of the formula tobacco shreds by the average value of the uniformity of the two components of stem shreds and expanded tobacco shreds. The method of the present invention is simple to operate, has objective measurement results, and is highly accurate. It can characterize the uniformity and blending ratio of formula tobacco shreds at the same time, and has broad application prospects.

Description

Technical Field

[0001] The invention belongs to the field of tobacco processing and relates to a method for detecting and evaluating the blending ratio and blending uniformity of shredded tobacco in a cigarette formula. Background Art

[0002] In the process of cigarette production, tobacco blending usually refers to mixing and blending leaf shreds, stem shreds, expanded shreds, etc. according to certain proportions. The blending ratio and uniformity of each component of tobacco in cigarette formula directly affect the stability of cigarette formula, and then affect the smoke characteristics and sensory quality of cigarettes. Therefore, mastering the blending ratio and uniformity of each component of tobacco in cigarette formula is of great significance to improving the quality of cigarette products.

[0003] At present, for the detection of tobacco blending ratio and blending uniformity, patent document CN108195711A discloses a method for determining the blending uniformity of cigarette tobacco. This method takes the flavored blended tobacco for 5 times at the same time intervals during the production time of a batch, and performs thermal gravimetric test. The uniformity of cigarette tobacco blending is determined by calculating the similarity between the thermal gravimetric TG curves of each sample and the coefficient of variation between the similarities. This detection method can only measure the blending uniformity of each component in tobacco, but cannot determine the actual blending ratio of each component in tobacco. Patent document CN102519819A discloses a method for determining the blending uniformity of mixed shreds. This method prepares a separation liquid so that the expanded tobacco is completely floated in the separation liquid, and the mixed tobacco is completely precipitated in the separation liquid. Each separated expanded tobacco is dried and weighed separately to calculate the mixing uniformity. This detection method reflects the uniformity of formula tobacco by the uniformity of expanded tobacco, which may cause incomplete separation of expanded tobacco and residual expanded tobacco fragments in the suspension solution during the suspension separation process, resulting in low accuracy of the determination method. At the same time, this method cannot determine the proportion of stems and leaves in formula tobacco. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and provide a method for detecting and evaluating the blending ratio and blending uniformity of formula tobacco shreds in the cigarette preparation process, so as to detect the blending ratio and blending uniformity of formula tobacco shreds in the cigarette preparation process. The method adds markers to expanded tobacco shreds and stem shreds respectively, and further calculates the proportion of the three components of leaf shreds, expanded tobacco shreds and stem shreds in the formula tobacco shreds by measuring the proportion of the markers in the formula tobacco shreds, and characterizes the uniformity of the formula tobacco shreds by the average value of the uniformity of the two components of stem shreds and expanded tobacco shreds.

[0005] The present invention is achieved through the following technical solutions:

[0006] (1) Preparation of stems containing marker A

[0007] Add marker A to the shredded stems, mix them evenly, and then take samples at equal time intervals; determine the average content A of marker A in the shredded stem samples to which the marker is applied 梗丝 .

[0008] Among them, marker A needs to be water-soluble or alcohol-soluble, with high solubility and good thermal stability, and is selected from one or more of propylene glycol, cinnamyl alcohol, ethyl caprylate, glycerol, n-nonanol, diethylene glycol, isopentyl isovalerate, etc.; preferably, it is propylene glycol.

[0009] The added mass of marker A accounts for 0.5-3% of the mass of the shredded stems; preferably, it can be 0.5-1%, 1.5-2%, 2.5-3%, 0.5-0.6%, 0.6-0.7%, 0.7-0.8%, 0.8-0.9%, 0.9-1.0%, 1.0-1.1%, 1.1-1.2%, 1.2-1.3%, 1.3-1.4%, 1.4-1.5%, 1.5-1.6%, 1.6-1.7%, 1.7-1.8%, 1.8-1.9%, 1.9-2.0%, 2.1-2.2%, 2.2-2.3%, 2.3-2.4%, 2.4-2.5%, 2.5-2.6%, 2.6-2.7%, 2.7-2.8%, 2.8-2.9%, 2.9-3.0%. More preferably, it is 1%.

[0010] Wherein, the marker A can be added to the silk thread stem cutting feeding cylinder or the silk thread fragrance adding cylinder; sampling at equal time intervals can be carried out at the outlet of the silk thread stem cutting feeding cylinder or the silk thread fragrance adding cylinder as needed.

[0011] There is no particular restriction on the number of samples taken in this step. However, based on saving time and cost, the more samples are taken, the more accurate the relative determination result will be. In a specific embodiment, 30 samples are taken for the shredded stems containing marker A.

[0012] (2) Preparation of expanded tobacco containing marker B

[0013] Add marker B to the expanded tobacco, mix well, and take samples at equal time intervals; determine the average content of marker B in the expanded tobacco samples with the marker applied. 膨丝 .

[0014] Among them, the marker B needs to be water-soluble or alcohol-soluble, with high solubility and good thermal stability, and is selected from one or more of diethylene glycol, n-nonanol, propylene glycol, cinnamyl alcohol, ethyl caprylate, glycerol, isopentyl isovalerate, etc.; preferably, it is diethylene glycol. In the present invention, the marker B is different from the marker A.

[0015] The added mass of the marker B accounts for 0.5-3% of the mass of the expanded tobacco, preferably 0.5-1%, 1.5-2%, 2.5-3%, 0.5-0.6%, 0.6-0.7%, 0.7-0.8%, 0.8-0.9%, 0.9-1.0%, 1.0-1.1%, 1.1-1.2%, 1.2-1.3%, 1.3-1.4%. , 1.4-1.5%, 1.5-1.6%, 1.6-1.7%, 1.7-1.8%, 1.8-1.9%, 1.9-2.0%, 2.1-2.2%, 2.2-2.3%, 2.3-2.4%, 2.4-2.5%, 2.5-2.6%, 2.6-2.7%, 2.7-2.8%, 2.8-2.9%, 2.9-3.0%. More preferably, it is 1%.

[0016] Among them, marker B can be added during the cooling and rehumidification of the expanded tobacco line or the flavoring of the tobacco line; sampling at equal time intervals can be carried out at the outlet of the cooling and rehumidification cylinder of the expanded tobacco line or the flavoring cylinder of the tobacco line as needed.

[0017] There is no particular restriction on the number of samples taken in this step. However, based on saving time and cost, the more samples are taken, the more accurate the relative determination result will be. In a specific embodiment, 30 samples are taken from the expanded tobacco containing marker B.

[0018] (3) Preparation of Formula Tobacco

[0019] Normal shredded tobacco leaves are blended with shredded stems to which marker A has been applied and expanded shredded tobacco to which marker B has been applied at the blending line to obtain blended shredded tobacco, wherein the flavoring tube is not flavored and is only used for blending; the blended shredded tobacco is sampled at equal time intervals at the outlet of the flavoring tube to determine the average content of propylene glycol in the blended shredded tobacco samples A 烟丝 Its coefficient of variation CV A , and the average content of diethylene glycol B 烟丝 Its coefficient of variation CV B .

[0020] The blending ratio of normal tobacco shreds, expanded tobacco shreds with marker B, and stem shreds with marker A is 50-90:5-20:5-30 (mass ratio), for example, 50:5-20:5-30, 60:5-20:5-30, 70:5-20:5-30, 80:5-20:5-30, 90:5-20:5-30, 50-9 0:5:5-30, 50-90:10:5-30, 50-90:15:5-30, 50-90:20:5-30, 50-90:5-20:5, 50-90:5-20:10, 50-90:5-20:15, 50-90:5-20:20, 50-90:5-20:25, 50-90:5-20:30. Preferably, the blending ratio of normal leaf shreds, expanded shreds with marker B applied, and shredded stems with marker A applied is 8:1:1 (mass ratio).

[0021] There is no particular restriction on the number of samples taken in this step. However, based on saving time and cost, the more samples are taken, the more accurate the relative determination result will be. In a specific embodiment, 30 samples are taken for the formulated tobacco.

[0022] (4) Calculate the blending ratio and blending uniformity of formula tobacco

[0023] In the present invention, the coefficient of variation of marker A in the formula tobacco represents the uniformity of the stem cut ratio in the formula tobacco, which is recorded as CV A The coefficient of variation of marker B represents the uniformity of the proportion of expanded tobacco in the formula tobacco, recorded as CV B The blending uniformity is characterized by the average value of the uniformity of stem cut tobacco and expanded tobacco cut. The smaller the coefficient of variation, the more uniform the blending.

[0024] Calculate the blending ratio w of shredded stems 梗丝 :

[0025]

[0026] Calculate the blending ratio w of expanded tobacco 膨丝 :

[0027]

[0028] Calculate the blending ratio w of leaf shreds 叶丝

[0029] w 叶丝 =1-w 膨丝 -w 梗丝

[0030] Calculate the blending uniformity H

[0031]

[0032] The uniformity H value reflects the uniformity of blending. The higher the H value, the higher the blending uniformity. The change in H value can be used to measure the change in blending uniformity before and after process or equipment improvement.

[0033] In the present invention, the equal-interval sampling refers to sampling once at the same time, such as sampling once every 1 minute, 2 minutes, 3 minutes, etc.

[0034] In the present invention, the normal leaf shreds, stem shreds and expanded shredded tobacco used for making cigarettes need not contain the marker A and marker B components.

[0035] The advantages of the present invention are: the present invention adds different markers to the stem shreds and expanded shreds respectively, blends the stem shreds with added markers, the expanded shreds with added markers and the normal shreds in a certain ratio, and calculates the ratio of each blended product and evaluates the blending uniformity by measuring the content of each marker in the formula shreds. The method is simple to operate, has fewer detection indicators, and is simple to process data. It can quantitatively calculate the blending ratio of each blended product in the formula shreds and the blending uniformity of the formula shreds at the same time, and the measurement results are objective and accurate. The detection and evaluation method of the present invention is independent of the shredded tobacco preparation process, that is, the present invention detects the blending ratio and blending uniformity of each raw material in the preparation process line by simulating the shredded tobacco preparation process alone. After the measurement is completed, the feeding cylinder, the flavoring cylinder or the cooling and rehumidification cylinder is cleaned or treated to remove the markers A and B, thereby avoiding their influence on the formal preparation of cigarette products. The method of the present invention has broad application prospects. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the examples. These examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. The process, conditions, experimental methods, etc. for implementing the present invention, except for the contents specifically mentioned below, are all common knowledge and common common sense in the art, and the present invention is not particularly limited.

[0037] Example 1 Calculation of blending ratio and blending uniformity of finished tobacco obtained by artificial mixing by the method of the present invention

[0038] The propylene glycol content in the cut stems with propylene glycol applied as a marker and the diethylene glycol content in the expanded cut tobacco with diethylene glycol applied as a marker were determined. The cut stems with markers, the expanded cut tobacco with markers and the shredded leaves without markers were manually weighed in a mass ratio of 1:1:8 to prepare finished cut tobacco, a total of 15 portions were prepared, and the mass of each portion of the finished cut tobacco was 2g. The method of the present invention was used to detect the two markers in the finished cut tobacco, and the ratios of the cut stems, expanded cut tobacco and cut leaves were calculated. The results are as follows:

[0039] (1) Determination of the average propylene glycol content A in the cut stem samples to which the marker was applied梗丝 .

[0040] A 梗丝 =0.85%

[0041] (2) Determine the average content of diethylene glycol in the bulked silk sample with the marker (B bulked silk).

[0042] B 膨丝 =0.82%

[0043] (3) Determine the contents of propylene glycol and diethylene glycol in the prepared formula tobacco.

[0044] Table 1 Marker content detection results

[0045]

[0046] Average content of propylene glycol A 烟丝 =0.0866%

[0047] Coefficient of variation CV of propylene glycol A =3.12%

[0048] Average content of diethylene glycol B 烟丝 =0.0802%

[0049] The coefficient of variation of diethylene glycol B =2.72%.

[0050] (4) Calculate the stem cut ratio and expanded cut tobacco ratio in the formula tobacco.

[0051] Calculate the blending ratio w of shredded stems 梗丝 :

[0052]

[0053] Calculate the blending ratio w of expanded tobacco 膨丝 :

[0054]

[0055] Calculate the blending ratio w of leaf shreds 叶丝

[0056] w 叶丝 =1-w 膨丝 -w 梗丝 =80.03%

[0057] Calculate the blending uniformity H

[0058]

[0059] The error between the blending ratio of formula tobacco shreds detected by the method of the present invention and the actual formula ratio is 3%, and the error between the blending uniformity of formula tobacco shreds detected by the method and the actual formula uniformity (the actual formula uniformity is 100%) is 3%, which shows that the method of the present invention has high accuracy, good repeatability, and is scientific and reliable, and can be used to evaluate the blending ratio and blending uniformity of formula tobacco shreds of cigarettes.

[0060] Example 2 Calculation of blending ratio and blending uniformity of formula tobacco obtained by the tobacco blending line by the method of the present invention

[0061] The method for detecting the blending ratio and blending uniformity of cigarette formula shredded tobacco of the present invention comprises the following specific steps:

[0062] (1) A propylene glycol aqueous solution is prepared at a mass ratio of 50%, and the propylene glycol aqueous solution is added to the shredded stems in a flavoring machine at a mass ratio of 2%, and mixed (i.e., the net content of propylene glycol in the mixture is shredded stems × 2% × 50%), and 30 shredded stem samples with propylene glycol markers are sampled at an interval of 1 minute at the outlet of the flavoring machine; and the average propylene glycol content A in the shredded stem samples with the markers is determined. 梗丝 .

[0063] (2) A diethylene glycol aqueous solution is prepared at a mass ratio of 50%, and the diethylene glycol aqueous solution is added to the expanded tobacco of the flavoring machine at a mass ratio of 2%, mixed, and 30 samples of the expanded tobacco with diethylene glycol markers are sampled at intervals of 1 minute at the outlet of the flavoring machine to determine the average content of diethylene glycol in the expanded tobacco samples with the markers. 膨丝 .

[0064] (3) In the flavoring machine of the blending line, normal dried leaf shreds (without markers), stem shreds with markers, and expanded shreds with markers are mixed (the flavoring machine only mixes the shreds without adding fragrance) to prepare formulated shredded tobacco. Thirty samples of the mixed formulated shredded tobacco are sampled at intervals of 1 minute at the outlet of the flavoring machine. The average propylene glycol content A in the mixed formulated shredded tobacco samples is determined respectively. 烟丝 Its coefficient of variation CV A , and the average content of diethylene glycol B 烟丝 Its coefficient of variation CV B .

[0065] Among them, the blending ratio of each blending product is set as follows (mass ratio):

[0066] Normal leaf shreds: expanded shreds with marker B: stem shreds with marker A = 8:1:1

[0067] (4) Calculation of blending ratio and blending uniformity

[0068] Calculate the blending ratio w of stem cuts in formula tobacco梗丝 :

[0069]

[0070] Calculate the blending ratio w of expanded tobacco in formula tobacco 膨丝 :

[0071]

[0072] Calculate the blending ratio w of leaf shreds in formula tobacco 叶丝 :

[0073] w 叶丝 =1-9.72%-10.85%=79.43%

[0074] Calculate the blending uniformity H of formula tobacco:

[0075]

[0076] Table 2 Results of marker content and coefficient of variation test

[0077]

[0078]

[0079] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents. Without departing from the spirit and scope of the inventive concept, the changes and advantages that can be thought of by those skilled in the art should be included in the scope of the technical solution for which protection is requested by the present invention.

Claims

1. A method for detecting the blending ratio and blending uniformity of tobacco shreds in cigarette formula, characterized in that: The method comprises: (1) Preparation of stems containing marker A Apply marker A to the shredded stems, take samples multiple times, and measure the average content A of marker A in the shredded stem samples to which the marker is applied 梗丝 ; (2) Preparation of expanded tobacco containing marker B Add marker B to expanded tobacco, take samples several times, and measure the average content of marker B in the expanded tobacco samples with the marker 膨丝 ; (3) Preparation of Formula Tobacco Normal shredded tobacco leaves are blended with shredded stems containing marker A and expanded shredded tobacco containing marker B to obtain formulated shredded tobacco; samples are taken at equal time intervals to determine the average content of marker A in the mixed formulated shredded tobacco samples. 烟丝 Its coefficient of variation CV A , and the average content of marker B 烟丝 Its coefficient of variation CV B ; (4) Calculate the blending ratio and blending uniformity of formula tobacco Calculate the blending ratio w of stem shreds containing marker A 梗丝 : Calculate the blending ratio w of expanded tobacco containing marker B 膨丝 : Calculate the blending ratio w of normal leaf silk 叶丝 In 叶丝 =1-in 膨丝 -In 梗丝 Calculate the blending uniformity H In step (1), the marker A is selected from propylene glycol; and / or, in step (2), the marker B is selected from diethylene glycol.

2. The method according to claim 1, characterized in that In step (3), the coefficient of variation CV of marker A is A Represents the uniformity of the stem-to-shred ratio in the formula tobacco; Marker A is water-soluble or alcohol-soluble; and / or, In step (3), the coefficient of variation CV of marker B is B Represents the uniformity of the expanded tobacco ratio in the formula tobacco; marker B is water-soluble or alcohol-soluble; and / or, Marker B is different from marker A.

3. The method according to claim 1, characterized in that In step (1), the added mass of marker A accounts for 0.5-3% of the mass of the shredded stems; In step (2), the added mass of the marker B accounts for 0.5-3% of the mass of the expanded tobacco.

4. The method according to claim 1, characterized in that In step (1), the added mass of marker A accounts for 1% of the mass of cut stems; and / or, in step (2), the added mass of marker B accounts for 1% of the mass of expanded cut tobacco.

5. The method according to claim 1, characterized in that In step (3), the blending ratio of normal shredded tobacco, expanded shredded tobacco containing marker B, and shredded stems containing marker A is 50-90:5-20:5-30 by mass.

6. The method according to claim 1, characterized in that In step (3), the blending ratio by mass of normal shredded tobacco, expanded shredded tobacco containing marker B, and shredded stems containing marker A is 8:1:

1.

7. The method according to claim 1, characterized in that In step (1), marker A is added to the stem cutting feeding cylinder or the tobacco thread flavoring cylinder, and samples are taken at equal time intervals; in step (2), marker B is added during the cooling and rehydration of the expanded tobacco thread or the tobacco thread flavoring process, and samples are taken at equal time intervals.

8. The method according to claim 1, characterized in that In step (1), the multiple sampling is 30 times or more; in step (2), the multiple sampling is 30 times or more.

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