CN115060637A - Method for predicting suction resistance of multi-element filter stick cigarette product - Google Patents
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- 235000019504 cigarettes Nutrition 0.000 title claims abstract description 154
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- 235000002637 Nicotiana tabacum Nutrition 0.000 claims abstract description 38
- 239000000779 smoke Substances 0.000 claims abstract description 26
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Abstract
The invention discloses a method for predicting the smoke resistance of a multi-filter-rod cigarette product, which is a method for finally obtaining the cigarette smoke resistance prediction result of the multi-filter-rod cigarette product by acquiring the characteristics of raw and auxiliary materials of a target cigarette and cigarette specification data, calculating the tobacco shred permeability coefficients of different tobacco shred types and taking the ventilation degree of a filter tip as a variable. The method can realize the prediction of the suction resistance of the multi-element filter stick cigarette products with different specifications through the calculation among the cigarette parameters, thereby facilitating the design of the cigarette products.
Description
Technical Field
The invention relates to the technical field of cigarette processing, in particular to a method for predicting the suction resistance of a multi-filter-rod cigarette product.
Background
Cigarette smoke resistance is the most directly perceived characteristic of a cigarette by a consumer when smoking, and can directly affect the physical quality and sensory quality of the cigarette. Therefore, the research on the relation between each physical index of the cigarette and the raw and auxiliary materials and the realization of the advance prediction of the cigarette suction resistance have important significance for designing the cigarette.
In the prior art, the measurement of relevant parameters can be carried out only after tobacco shreds and filter sticks at production positions are required, certain hysteresis exists in the design of cigarettes, other methods for predicting the cigarette resistance only carry out regression modeling on a single cigarette brand, and when the specifications of the cigarettes and the characteristics of original and auxiliary materials are changed, the application range of the model has certain limitation. CN 109813646B discloses a method for predicting the smoke resistance of cigarettes, which does not consider the influence of the air permeability and the perforation position of cigarette paper on the smoke resistance of the cigarettes, has certain application limitation on the prediction of the smoke resistance of multi-component filter stick products, and in recent years, along with the enhancement of the innovation strength of the cigarettes, the number of binary filter stick and ternary filter stick cigarette products is gradually increased, so that the establishment of the prediction method of the smoke resistance of the multi-component filter stick cigarette products is necessary.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a method for predicting the suction resistance of a multi-element filter stick cigarette product, so that the suction resistance of the multi-element filter stick cigarette products with different specifications can be predicted by calculating cigarette parameters, the design of the cigarette products is facilitated, and the blindness problem of the design of cigarettes is avoided.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention relates to a method for predicting the suction resistance of a multi-element filter stick cigarette product, which is characterized by comprising the following steps of:
step 1, obtaining raw and auxiliary material characteristics and cigarette specification data of a target cigarette, comprising the following steps: tobacco shred filling value rho, net tobacco shred content M of cigarette, cigarette circumference C, tobacco shred length L of only cigarette paper wrapping part D The length L of the part of the tipping paper covering the tobacco section C Air permeability A of cigarette paper P The length L from the punching position to the mouth end A Cigarette paper lap width W and filter tip length l 2 Length l of filter tip 1 Length l of filter stick in middle section 3 Length L of filament end base rod 2 Pressure drop P of the filament-end base rod 2 Length L of base rod at mouth end 1 Pressure drop P of base rod at mouth end 1 Length L of the middle section base rod 3 Pressure drop P of the middle-stage base rod 3 ；
Step 2, calculating the tobacco shred permeability coefficients K of different tobacco shred types according to the formula (1);
in the formula (1), a and b represent two permeability calculation parameters;
step 3, calculating the ventilation distribution coefficient alpha and the suction resistance distribution coefficient beta of the target cigarette according to the formula (2) and the formula (3) respectively:
in the formulas (2) and (3), pi represents a circumferential ratio; gamma and epsilon represent two ventilation degree distribution calculation parameters, eta and theta represent two suction resistance distribution calculation parameters;
step 4, obtaining the prediction results of the cigarette resistance under different filter ventilation degrees;
A. when the target cigarette is a binary filter stick product, and L A <l 1 Then, the predicted cigarette resistance δ P is obtained according to the formula (4):
in the formula (4), V F Representing the filter ventilation rate; q represents the air flow of the quasi-middle outlet end of the suction resistance detection, and lambda represents a suction resistance calculation parameter;
B. when the target cigarette is a binary filter stick product, and L A ＝l 1 Then, the predicted cigarette smoke resistance delta P is obtained according to the formula (5):
C. when the target cigarette is a binary filter stick product, and L A >l 1 Then, the predicted cigarette smoke resistance delta P is obtained according to the formula (6):
in the formula (6), L B The length of the filter stick after the tipping paper is punched is shown;
D. when the target cigarette is a ternary filter stick product, and L is A <l 1 Then, the predicted cigarette resistance δ P is obtained according to the formula (7):
E. when the target cigarette is a ternary filter stick product, and L A ＝l 1 Then, the predicted cigarette smoke resistance delta P is obtained according to the formula (8)：
F. When the target cigarette is a ternary filter stick product, and 1 <L A <(l 1 +l 3 ) Then, the predicted cigarette smoke resistance delta P is obtained according to the formula (9):
G. when the target cigarette is a ternary filter stick product, and L is A ＝(l 1 +l 3 ) Then, the predicted cigarette smoke resistance delta P is obtained according to the formula (10):
H. when the target cigarette is a ternary filter stick product, and L is A >(l 1 +l 3 ) Then, the predicted cigarette smoke resistance δ P is obtained according to equation (11):
compared with the prior art, the invention has the beneficial effects that:
1. the prediction method of the invention establishes a relation model between the cigarette parameters and the suction resistance by taking the ventilation degree of the filter tip as a variable, and firstly provides a basis for reasonably designing the cigarette structure, selecting the cigarette material and designing the parameters, thereby realizing the predictability of the design of the cigarette product with the multi-element filter stick. Secondly, when the physical indexes of the cigarette in actual production have problems, the reason of the problems can be determined according to the model, and the direction is indicated for quality improvement, so that the product quality can be continuously improved.
2. The prediction method can realize the design work of multi-filter-rod cigarette products with different cigarette circumferences and structural specifications, and has wide application range.
Drawings
FIG. 1 is a block diagram of the design flow of the present invention;
FIG. 2 is a schematic structural view of a binary filter rod cigarette product of the present invention;
figure 3 is a schematic structural view of a ternary filter stick cigarette product of the invention.
Detailed Description
In this embodiment, the filter rod segment of the multi-filter rod cigarette product is formed by combining two or three different base rods, wherein the structure of the binary filter rod cigarette product is shown in fig. 2, and the structure of the ternary filter rod cigarette product is shown in fig. 3; a prediction method of the suction resistance of a multi-filter-rod cigarette product is based on the relation between the structure and physical parameters of the multi-filter-rod cigarette product, a mathematical relation expression is established, and the purpose of predicting the suction resistance of the multi-filter-rod cigarette product is finally realized, specifically, as shown in figure 1, the prediction method is characterized by comprising the following steps:
step 1, obtaining raw and auxiliary material characteristics and cigarette specification data of a target cigarette, comprising the following steps: tobacco shred filling value rho, net tobacco shred content M of cigarette, cigarette circumference C, tobacco shred length L of only cigarette paper wrapping part D The length L of the part of the tipping paper covering the tobacco section C Length of filter stick segment, length of tipping paper and air permeability A of cigarette paper P Length L from the hole-punched part to the mouth end A Cigarette paper lap width W and filter tip length l 2 Length l of filter tip 1 Length l of filter stick in middle section 3 Length L of filament end base rod 2 Pressure drop P of the filament-end base rod 2 Length L of base rod at mouth end 1 Pressure drop P of base rod at mouth end 1 Length L of the middle section base rod 3 Pressure drop P of the middle-stage base rod 3 ；
Step 2, calculating the tobacco shred permeability coefficients K of different tobacco shred types according to the formula (1);
in the formula (1), the unit of K is cm 2 /(KPa × sec); m is mg/count; l is C The length of the part of the tipping paper of the target cigarette covering the tobacco section is expressed in cm; l is D The unit is cm; c is in cm; rho unit is cm 3 (ii) in terms of/g. a, b represent two permeability calculation parameters.
The tobacco shred permeability coefficient K directly influences the physical parameters of the cigarette and has important influence on the cigarette resistance and the cigarette ventilation degree. The formula (1) and the formula (2) are obtained by researching tobacco shred permeability coefficients K, net shred content, filling values and tobacco shred section volume detection results of a large number of different types and different specifications of cigarette tobacco shred sections according to the basic principle that the net shred content M and the tobacco shred permeability coefficients K are in a negative correlation relationship. In this embodiment, when the tobacco type of the target cigarette is a flue-cured tobacco type, the value of a is 1980.9, and the value of b is 17.4; when the tobacco type of the target cigarette is mixed type tobacco, the value of a is 2183.1, and the value of b is 20.5.
Step 3, calculating the ventilation distribution coefficient alpha and the suction resistance distribution coefficient beta of the target cigarette according to the formula (2) and the formula (3) respectively:
in the formulas (2) and (3), pi represents a circumferential ratio; a. the P The unit is CU; w is in cm. Both the ventilation degree distribution coefficient alpha and the suction resistance distribution coefficient beta are dimensionless; gamma and epsilon represent two ventilation degree distribution calculation parameters, eta and theta represent two suction resistance distribution calculation parameters, and the parameters are dimensionless. The two coefficients are derived based on the principle of ventilation and suction resistance distribution in the cigarette, and in the embodiment, the value of gamma is
Value of epsilon
Eta is 12.56, theta is 0.438.
Step 4, obtaining the prediction results of the cigarette resistance under different filter ventilation degrees;
A. when the target cigarette is a binary filter stick product, and L A <l 1 Then, the predicted cigarette resistance δ P is obtained according to the formula (4):
in the formula (4), the unit of delta P is KPa; p 1 The unit is KPa; l is 1 The unit is cm; l is A The unit is cm; l 1 The unit is cm; p 2 The unit is KPa; l is 2 The unit is cm; l 2 The unit is cm; v F Represents the ventilation rate of the filter, dimensionless, generally expressed as a percentage; q represents the air flow rate of the outlet end in the suction resistance detection gauge, the unit is mL/second, and the value of Q is 17.5 according to the GB/T22838.5-2009 standard in the embodiment; and lambda represents a suction resistance calculation parameter, and the value of lambda is 70 pi in the embodiment.
B. When the target cigarette is a binary filter stick product, and L A ＝l 1 Then, the predicted cigarette smoke resistance delta P is obtained according to the formula (5):
C. when the target cigarette is a binary filter stick product, and L A >l 1 Then, the predicted cigarette smoke resistance delta P is obtained according to the formula (6):
in formula (6), L B The length of the filter stick after the tipping paper is punched is expressed in cm;
D. when the target cigarette is a ternary filter stick product, and L is A <l 1 Then, the predicted cigarette resistance δ P is obtained according to the formula (7):
in the formula (7), P 3 The unit is KPa; l is 3 The unit is cm; l 3 The unit is cm;
E. when the target cigarette is a ternary filter stick product, and L is A ＝l 1 Then, the predicted cigarette smoke resistance delta P is obtained according to the formula (8):
F. when the target cigarette is a ternary filter stick product, and 1 <L A <(l 1 +l 3 ) Then, the predicted cigarette smoke resistance delta P is obtained according to the formula (9):
G. when the target cigarette is a ternary filter stick product, and L is A ＝(l 1 +l 3 ) Then, the predicted cigarette resistance δ P is obtained according to equation (10):
H. when the target cigarette is a ternary filter stick product, and L is A >(l 1 +l 3 ) Then, the predicted cigarette smoke resistance δ P is obtained according to equation (11):
the formula (5-11) is obtained by respectively establishing data models according to the structural parameters of the multi-filter stick cigarette product and the change of the punching position based on the concept and the detection principle of main parameters in the cigarette.
The invention is further described below with reference to examples.
Example 1, 97(30+67) mm × 17mm of a certain cured tobacco shred, and prediction of the smoke resistance of a binary filter stick cigarette product is taken as an example.
Step 1, obtaining the characteristics of raw and auxiliary materials of cigarettes and cigarette specification data, as shown in table 1:
TABLE 1 cigarette parameters
| Cigarette specification | 97(30+67)mm×17mm |
| Cigarette circumference (cm) | 1.7 |
| Length of tobacco shred segment (cm) | 6.7 |
| Filter segment length (cm) | 3.0 |
| Tipping paper length (cm) | 3.6 |
| Distance (cm) from the end of the nozzle at the perforation | 1.2 |
| Cigarette paper lap width (cm) | 0.2 |
| L A (cm) | 1.2 |
| L B (cm) | 1.8 |
| L C (cm) | 0.6 |
| L D (cm) | 6.1 |
| P 1 (KPa) | 3.7 |
| L 1 (cm) | 12.0 |
| l 1 (cm) | 1.0 |
| P 2 (KPa) | 4.1 |
| L 2 (cm) | 12.0 |
| l 2 (cm) | 2.0 |
| Air permeability of cigarette paper (CU) | 70 |
| Filling value (cm) 3 /g) | 4.41 |
| Net silk content (mg/count) | 350 |
Step 2, calculatingThe permeability coefficient of the cut tobacco is flue-cured tobacco, so according to the formula (1), K is 593.88cm 2 /(KPa. times.sec).
Step 3, calculating a ventilation distribution coefficient and a suction resistance distribution coefficient according to the formulas (2) and (3) to obtain alpha which is 0.2477; 0.0482.
Step 4, due to L A ＝1.2cm，l 1 ＝1.0cm，L A >l 1 According to the formula (6), the cigarette suction resistance under different filter tip ventilation degrees is calculated, and the comparison of the prediction result and the actual measurement result is shown in the table 2. It can be seen that the maximum error of the suction resistance is 0.049KPa, the average absolute error is 0.026KPa, the average relative error is 2.23%, and the prediction result is ideal.
TABLE 2 comparison of measured results and predicted results
Example 2, the prediction of the resistance to draw of a ternary filter stick cigarette product of 89(30+59) mm × 20mm for a certain blended tobacco shred is taken as an example.
Step 1, obtaining the characteristics of the raw and auxiliary materials of the cigarette and the specification data of the cigarette, as shown in table 3:
TABLE 3 cigarette parameters
| Cigarette specification | 89(30+59)mm×20mm |
| Cigarette circumference (cm) | 2.0 |
| Length of tobacco shred segment (cm) | 5.9 |
| Filter segment length (cm) | 3.0 |
| Length of tipping paper (cm) | 3.5 |
| Distance (cm) from the mouth end at the perforation | 1.2 |
| Cigarette paper lap width (cm) | 0.2 |
| L A (cm) | 1.3 |
| L B (cm) | 1.7 |
| L C (cm) | 0.5 |
| L D (cm) | 5.4 |
| P 1 (KPa) | 3.5 |
| L 1 (cm) | 10.0 |
| l 1 (cm) | 1.0 |
| P 2 (KPa) | 4.0 |
| L 2 (cm) | 12.0 |
| l 2 (cm) | 1.5 |
| P 3 (KPa) | 1.0 |
| L 3 (cm) | 10.0 |
| l 3 (cm) | 0.5 |
| Air permeability of cigarette paper (CU) | 60 |
| Filling value (cm) 3 /g) | 4.51 |
| Net silk content (mg/count) | 415 |
Step 2, calculating the permeability coefficient of the cut tobacco, wherein the specification is a mixed type, so that according to the formula (1), K is 557.30cm 2 /(KPa × sec).
Step 3, calculating a ventilation distribution coefficient and a suction resistance distribution coefficient according to the formulas (2) and (3) to obtain alpha which is 0.1515; 0.0319.
Step 4, due to L A ＝1.3cm，l 1 ＝1.0cm，l 3 ＝0.5cm，l 1 <L A <(l 1 +l 3 ) And (5) calculating the cigarette suction resistance under different filter tip ventilation degrees according to the formula (9), and comparing the predicted result with the actual measurement result, for example, in the table 4. It can be seen that the maximum error of the draw resistance is 0.045KPa, the average absolute error is 0.025KPa, averageThe relative error of each phase is 2.51 percent, and the prediction result is ideal.
TABLE 4 comparison of measured results and predicted results
It can be seen from the above embodiments that by adopting the method of the present invention, the prediction result of the resistance of the multi-filter-rod cigarette product can be obtained, and the overall result is relatively ideal.
Claims (1)
1. A method for predicting the suction resistance of a multi-element filter stick cigarette product is characterized by comprising the following steps:
step 1, obtaining raw and auxiliary material characteristics and cigarette specification data of a target cigarette, comprising the following steps: tobacco shred filling value rho, net tobacco shred content M of cigarette, cigarette circumference C, tobacco shred length L of only cigarette paper wrapping part D The length L of the part of the tipping paper covering the tobacco section C Air permeability A of cigarette paper P Length L from the hole-punched part to the mouth end A Cigarette paper lap width W and filter tip length l 2 Length of filter tip 1 Length l of filter stick in middle section 3 Length L of filament end base rod 2 Pressure drop P of the filament-end base rod 2 Length L of base rod at mouth end 1 Pressure drop P of base rod at mouth end 1 Length L of the middle section base rod 3 Pressure drop P of the middle-stage base rod 3 ；
Step 2, calculating the tobacco shred permeability coefficients K of different tobacco shred types according to the formula (1);
in the formula (1), a and b represent two permeability calculation parameters;
step 3, calculating the ventilation distribution coefficient alpha and the suction resistance distribution coefficient beta of the target cigarette according to the formula (2) and the formula (3) respectively:
in the formulas (2) and (3), pi represents a circumferential ratio; gamma and epsilon represent two ventilation degree distribution calculation parameters, eta and theta represent two suction resistance distribution calculation parameters;
step 4, obtaining the prediction results of the cigarette resistance under different filter ventilation degrees;
A. when the target cigarette is a binary filter stick product, and L A <l 1 Then, the predicted cigarette smoke resistance delta P is obtained according to the formula (4):
in the formula (4), V F Representing the filter ventilation rate; q represents the air flow of the quasi-middle outlet end of the suction resistance detection, and lambda represents a suction resistance calculation parameter;
B. when the target cigarette is a binary filter stick product, and L A ＝l 1 Then, the predicted cigarette smoke resistance delta P is obtained according to the formula (5):
C. when the target cigarette is a binary filter stick product, and L A >l 1 Then, the predicted cigarette smoke resistance delta P is obtained according to the formula (6):
in the formula (6), L B The length of the filter stick after the tipping paper is punched is shown;
D. when the target cigarette is a ternary filter stick product, and L is A <l 1 Then, the predicted cigarette smoke resistance delta P is obtained according to the formula (7):
E. when the target cigarette is a ternary filter stick product, and L is A ＝l 1 Then, the predicted cigarette smoke resistance delta P is obtained according to the formula (8):
F. when the target cigarette is a ternary filter stick product, and 1 <L A <(l 1 +l 3 ) Then, the predicted cigarette resistance δ P is obtained according to the formula (9):
G. when the target cigarette is a ternary filter stick product, and L is A ＝(l 1 +l 3 ) Then, the predicted cigarette smoke resistance delta P is obtained according to the formula (10):
H. when the target cigarette is a ternary filter stick product, and L is A >(l 1 +l 3 ) Then, the predicted cigarette smoke resistance δ P is obtained according to equation (11):
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