Method for finely regulating and controlling release amount of mainstream smoke of cigarette

Abstract

The invention provides a method for finely regulating and controlling the release amount of mainstream smoke of cigarettes, which comprises the following steps: S100, regulating one or more parameter indexes of the type and content of wood pulp fibers of cigarette paper, the content of a combustion improver, the quantification of the cigarette paper and the air permeability to prepare cigarette paper with different carbonization diffusivity; s200, preparing cigarettes from the cigarette paper with different carbonization diffusivity, continuously monitoring the release amount of CO, TPM, nicotine and tar in the mainstream smoke of each cigarette, and fitting to obtain a function relationship between the carbonization diffusivity and the release amount of CO, TPM, nicotine and tar in the mainstream smoke; and S300, according to the function relationship in the step S200, by adjusting one or more parameter indexes in the step S100, the carbonization diffusivity is synchronously adjusted until the mainstream smoke release amount of the cigarette reaches a preset standard. Under the condition that the ventilation rate of cigarettes is not adjusted, according to different cigarette specifications, the release amount of CO, TPM, nicotine and tar in main stream smoke is adjusted and controlled by adjusting and controlling the carbonization diffusivity of the cigarette paper.

Description

Technical Field

[0001] This invention relates to the field of cigarette manufacturing, and in particular to a method for precisely controlling the release of mainstream cigarette smoke. Background Technology

[0002] When cigarettes burn at high temperatures, the chemical components within the tobacco undergo a series of processes including distillation, pyrolysis, polymerization, and combustion, forming a highly complex smoke. The composition and content of mainstream cigarette smoke are crucial indicators of cigarette quality. Mainstream cigarette smoke includes CO, TPM (total particulate matter), nicotine, and tar. Mainstream cigarette smoke not only affects cigarette quality and taste, and consumer satisfaction, but also relates to consumer health and safety. Therefore, the design of mainstream cigarette smoke directly impacts a company's product quality and brand image, playing a vital role in enhancing its market competitiveness. With changing consumer attitudes towards tobacco products in my country, consumer demands for tobacco products are also evolving. Research on mainstream cigarette smoke design can provide support for meeting these new consumer needs.

[0003] Currently, in addition to adjusting the tobacco formula, methods for controlling the mainstream smoke of cigarettes also include changing the conventional physical properties of auxiliary materials, such as adjusting the perforation of tipping paper, the draw resistance of filter rods, the quality of cigarette paper, the air permeability of cigarette paper, and the combustion aids in cigarette paper.

[0004] Furthermore, a Chinese invention patent with patent number "ZL201310491839.5" and titled "A cigarette paper with variable diffusion rate and pore structure and its application" specifically discloses that "the cigarette paper is made by adding an additive composed of a combustion aid and a co-catalyst to ordinary cigarette paper; wherein, the mass ratio of combustion aid to co-catalyst is 90-98:2-10; the combustion aid is composed of potassium salt and calcium salt in a molar ratio of 1:5-50:1, and the co-catalyst is an organometallic iron salt and / or zinc salt." This invention only provides a way to change the diffusion performance of cigarette paper by changing the additive composed of the combustion aid and co-catalyst, and only changes the amount of CO released in the mainstream smoke of the cigarette paper.

[0005] Therefore, there is a need to provide a method for finely controlling the release of mainstream cigarette smoke, which can regulate the release of CO, TPM, nicotine and tar in mainstream smoke by controlling the carbonization diffusion rate of cigarette paper. Summary of the Invention

[0006] In view of the shortcomings of the prior art described above, the technical problem to be solved by the present invention is to provide a method for finely controlling the release of mainstream cigarette smoke, which controls the release of CO, TPM, nicotine and tar in mainstream smoke by controlling the carbonization diffusion rate of cigarette paper without adjusting the cigarette ventilation rate.

[0007] This invention proposes a method for finely controlling the release of mainstream cigarette smoke, comprising the following steps:

[0008] S100. By adjusting one or more parameters of the type and content of wood pulp fiber, the content of combustion aid, the basis weight and air permeability of cigarette paper, cigarette paper can be prepared with different carbonization diffusion rates.

[0009] S200. Cigarettes are prepared from cigarette paper with different carbonization diffusion rates. The release of CO, TPM, nicotine and tar in the mainstream smoke of each cigarette is continuously monitored. The functional relationship between carbonization diffusion rate and the release of CO, TPM, nicotine and tar in the mainstream smoke is obtained by fitting.

[0010] S300. Based on the functional relationship in step S200, one or more parameter indicators in step S100 are adjusted to simultaneously regulate the carbonization diffusion rate until the mainstream smoke release of cigarettes reaches the predetermined standard.

[0011] Preferably, in step S100, the cigarette paper is heated in an oven at 250°C for 40 minutes for carbonization treatment, and the carbonization diffusion rate of the cigarette paper is obtained by a diffusion meter.

[0012] Preferably, in step S100, the wood pulp fiber includes softwood pulp, hardwood pulp and hemp pulp, and the content of softwood pulp, hardwood pulp and hemp pulp is adjusted in the range of 0% to 100%.

[0013] Preferably, in step S100, the adjustment range of the combustion improver content is 0.9% to 2.1%.

[0014] Preferably, the K / Na ratio in the combustion improver is adjusted within the range of 1.1 to 5.3.

[0015] Preferably, the basis weight of the cigarette paper is adjusted within a range of 27 g / m³. 2 ~35g / m 2 .

[0016] Preferably, the air permeability adjustment range is 40CU to 70CU.

[0017] Preferably, step S100 further includes the following steps: S110, verifying the stability of the obtained carbonization diffusion rate, wherein the stability verification includes the intra-day repeatability and inter-day repeatability of the carbonization diffusion rate. If the intra-day repeatability of the carbonization diffusion rate is ≤3% and the inter-day repeatability of the carbonization diffusion rate is ≤1.5%, then proceed to the next step; if the intra-day repeatability of the carbonization diffusion rate is >3% and / or the inter-day repeatability of the carbonization diffusion rate is >1.5%, then readjust the parameter indicators until the stability requirements are met.

[0018] As described above, the method for precisely controlling the release of mainstream cigarette smoke according to the present invention has the following beneficial effects:

[0019] This invention prepares cigarette papers of different specifications by controlling one or more parameters, including the type and content of wood pulp fibers, the type and content of combustion aids, the basis weight, and the air permeability of the cigarette paper. Each cigarette paper is then carbonized to obtain its carbonization diffusion rate. A functional relationship is obtained between the carbonization diffusion rate and the release of CO, TPM, nicotine, and tar in the mainstream cigarette smoke by fitting the data. Based on this functional relationship, the carbonization diffusion rate is controlled by adjusting the cigarette paper components, basis weight, and air permeability, thereby finely controlling the release of mainstream cigarette smoke to achieve a predetermined standard. This invention regulates the release of CO, TPM, nicotine, and tar in mainstream smoke by controlling the carbonization diffusion rate of the cigarette paper, based on different cigarette specifications, without adjusting the cigarette ventilation rate. Attached Figure Description

[0020] Figure 1 A flowchart illustrating a method for finely controlling the release of mainstream cigarette smoke according to an embodiment of the present invention. Detailed Implementation

[0021] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0022] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0023] Example 1

[0024] This invention provides an embodiment of a method for finely controlling the release of mainstream cigarette smoke, comprising the following steps:

[0025] S100. One or more parameters of the following are adjusted in cigarette paper: type and content of wood pulp fiber, content of combustion aid, basis weight, and air permeability. Fillers such as CaCO3 are added to the wood pulp fiber. Cigarette paper is prepared by mechanical pulping. The prepared cigarette paper is then carbonized in a 250℃ oven for 40 minutes. The carbonization diffusion rate of the carbonized cigarette paper is then measured using a Sodim diffuser. The wood pulp fiber includes softwood pulp, hardwood pulp, and hemp pulp. The preferred adjustment range for the content of softwood pulp, hardwood pulp, and hemp pulp is 0%–100%. The preferred adjustment range for the content of combustion aid is 0.9%–2.1%. The combustion aid includes potassium salt and sodium salt. Potassium citrate can be selected as the potassium salt, and sodium citrate can be selected as the sodium salt. The preferred adjustment range for the K / Na ratio in the combustion aid is 1.1–5.3. The preferred adjustment range for the basis weight of the cigarette paper is 27 g / m³. 2 ~35g / m 2 The preferred range for adjusting air permeability is 40 CU to 70 CU. Table 1 shows the cigarette papers prepared with different carbonization diffusion rates.

[0026] S110. The stability of the cigarette paper with the obtained carbonization diffusion rate is verified, including the intra-day and inter-day repeatability of the carbonization diffusion rate. For intra-day repeatability verification, the carbonization diffusion rate of the five types of cigarette paper prepared in Table 1 is tested. Each type of cigarette paper is tested six times within one day, with ten groups of the same type of cigarette paper tested each time, to obtain the average value of the carbonization diffusion rate for each type of cigarette paper in each test. Then, the standard deviation SD1 value is calculated based on the average value, and the CV1 value (i.e., coefficient of variation) is calculated from the SD1 value. This CV1 value is used to measure intra-day repeatability. Specific results are detailed in Table 2. To verify the daily repeatability of carbonization diffusion rate, five types of cigarette paper, identical to those used in verifying intra-day repeatability, were selected. Testing was conducted daily for six consecutive days, with ten groups of the same type of cigarette paper tested each time. The average carbonization diffusion rate for each type of cigarette paper was obtained for each test. The standard deviation (SD1) was calculated based on the average value, and the CV1 value was derived from the SD1 value. The CV1 value was used to measure the daily repeatability. Specific results are detailed in Table 3. If the intra-day repeatability of carbonization diffusion rate is ≤3% and ≤1.5%, the stability verification is complete, and the next step can be implemented. If the intra-day repeatability of carbonization diffusion rate is >3% and / or >1.5%, the stability of the cigarette paper's carbonization diffusion rate is poor. It is necessary to readjust one or more parameters, including the type and content of wood pulp fiber, the content of combustion aid, the basis weight of the cigarette paper, and air permeability, until the stability requirements are met.

[0027] After the prepared cigarette paper meets the stability requirements (S200), cigarette papers with different carbonization diffusion rates are used to prepare non-perforated regular cigarettes. The release amounts of CO, TPM (total particulate matter), nicotine, and tar in the mainstream smoke of each cigarette are continuously monitored. The functional relationship between carbonization diffusion rate and the release amounts of CO, TPM, nicotine, and tar in the smoke is obtained by fitting. Specifically, cigarette paper samples 2, 9, 18, and 19 with different carbonization diffusion rates from Table 1 are selected. Among them, the carbonization diffusion rate of sample 2 is 3.251 cm / s. Several non-perforated regular cigarettes are prepared from this cigarette paper. The average release amounts of CO in the mainstream smoke of this cigarette are 13.39 mg / cigarette, TPM are 14.95 mg / cigarette, nicotine are 1 mg / cigarette, and tar are 11.55 mg / cigarette. Using the same method, the carbonization diffusion rate of sample 9 was 3.199 cm / s, and the cigarettes prepared from it had an average CO release of 13.70 mg / cigarette, an average TPM release of 14.83 mg / cigarette, an average nicotine release of 0.98 mg / cigarette, and an average tar release of 11.38 mg / cigarette in the mainstream smoke. Sample 18 had an average carbonization diffusion rate of 3.634 cm / s, and an average CO release of 12.61 mg / cigarette in the mainstream smoke. The average release amounts of CO, TPM, nicotine, and tar in the cigarette smoke were 14.50 mg / cigarette, 1.01 mg / cigarette, and 10.69 mg / cigarette, respectively. Sample 19 had a carbonization diffusion rate of 2.855 cm / s, and the average release amounts of CO, TPM, nicotine, and tar in the mainstream smoke were 18.29 mg / cigarette, 16.53 mg / cigarette, 1.10 mg / cigarette, and 12.71 mg / cigarette, respectively. By fitting the release amounts of CO, TPM, nicotine, and tar in the mainstream cigarette smoke corresponding to the carbonization diffusion rate of each sample, a univariate linear regression equation was obtained. It should be noted that the carbonization diffusion rate of cigarette paper is negatively linearly correlated with the release of CO, TPM, nicotine and tar in the mainstream cigarette smoke. By increasing or decreasing the carbonization diffusion rate of cigarette paper, the release of CO, TPM, nicotine and tar in the mainstream cigarette smoke will decrease or increase simultaneously. The results are detailed in Tables 4 and 5.

[0028] S300. Based on the univariate linear regression equation in step S200, and using the method in step S100, adjust one or more parameters, including the type and content of wood pulp fiber, the content of combustion aid, the basis weight of cigarette paper, and air permeability. Each parameter is adjusted according to the adjustment range specified in step S100. Without adjusting the cigarette ventilation rate, the carbonization diffusion rate of the cigarette paper is simultaneously and precisely adjusted until the mainstream smoke release reaches a predetermined standard, thereby achieving precise control over the release of CO, TPM, nicotine, and tar in the mainstream smoke of conventional cigarettes.

[0029] Example 2

[0030] Cigarette paper was prepared using the same method as step S100 in Example 1. The prepared cigarette paper was then placed in a 250°C oven and heated for 40 minutes for carbonization. The carbonization diffusion rate of the cigarette paper after carbonization was measured using a Sodim diffuser. The preparation results are shown in Table 1. Then, the stability of the cigarette paper with the obtained carbonization diffusion rate was verified using step S110 in Example 1 to ensure that the stability of the prepared cigarette paper meets the requirements.

[0031] After the prepared cigarette paper meets the requirements (S200), cigarettes with different carbonization diffusion rates are made into perforated medium-sized cigarettes. The release amounts of CO, TPM (total particulate matter), nicotine, and tar in the mainstream smoke of each perforated medium-sized cigarette are continuously monitored. The functional relationship between carbonization diffusion rate and the release amounts of CO, TPM, nicotine, and tar in the smoke is obtained by fitting. Specifically, cigarette paper samples 1, 4, 8, 10, 16, and 17 with different carbonization diffusion rates in Table 1 are selected. Among them, the carbonization diffusion rate of sample 1 is 3.540 cm / s. Several perforated medium-sized cigarettes are made from this cigarette paper. The average release amounts of CO, TPM, nicotine, and tar in the mainstream smoke of this cigarette are continuously monitored and found to be 7.53 mg / cigarette, 9.34 mg / cigarette, 0.69 mg / cigarette, and 6.90 mg / cigarette. Using the same method, the carbonization diffusion rate of sample 4 was 3.032 cm / s, with an average CO release of 8.26 mg / cigarette, an average TPM release of 10.58 mg / cigarette, an average nicotine release of 0.78 mg / cigarette, and an average tar release of 8.32 mg / cigarette in the mainstream smoke; the average carbonization diffusion rate of sample 8 was 3.131 cm / s, with an average CO release of 8.29 mg / cigarette, an average TPM release of 10.47 mg / cigarette, an average nicotine release of 0.79 mg / cigarette, and an average tar release of 8.45 mg / cigarette; and the average carbonization diffusion rate of sample 10 was 3.139 cm / s, with an average CO release of 7.46 mg / cigarette in the mainstream smoke. The average release of TPM was 9.50 mg / cigarette, nicotine was 0.72 mg / cigarette, and tar was 7.73 mg / cigarette. Sample 16 had a carbonization diffusion rate of 3.148 cm / s, with an average CO release of 8.39 mg / cigarette, TPM release of 10.91 mg / cigarette, nicotine release of 0.79 mg / cigarette, and tar release of 8.70 mg / cigarette in the mainstream smoke. Sample 17 had a carbonization diffusion rate of 2.735 mg / cigarette, with an average CO release of 10.58 mg / cigarette, TPM release of 11.75 mg / cigarette, nicotine release of 0.83 mg / cigarette, and tar release of 9.24 mg / cigarette in the mainstream smoke. By fitting the carbonization diffusion rate of each of the above samples to the release of CO, TPM, nicotine, and tar in the mainstream cigarette smoke, a univariate linear regression equation was obtained. That is, the carbonization diffusion rate of cigarette paper is negatively linearly correlated with the release of CO, TPM, nicotine, and tar in the mainstream cigarette smoke. For details, please refer to Tables 6 and 7.

[0032] S300. Based on the univariate linear regression equation in step S200, the method in step S100 is used to adjust one or more parameters, such as the type and content of wood pulp fiber, the content of combustion aid, the basis weight and air permeability of cigarette paper. Each parameter is adjusted according to the adjustment range of each parameter in step S100, so that the carbonization diffusion rate of cigarette paper is simultaneously and finely adjusted until the mainstream smoke release of cigarettes reaches the predetermined standard, so as to achieve fine control of the release of CO, TPM, nicotine and tar in the mainstream smoke of perforated cigarettes.

[0033] In summary, this invention regulates the release of CO, TPM, nicotine, and tar in mainstream smoke by adjusting the carbonization diffusion rate of cigarette paper according to different cigarette specifications, without adjusting the cigarette ventilation rate.

[0034] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

[0035] Table 1. Preparation of cigarette paper with different carbonization diffusion rates

[0036]

[0037] Table 2. Intra-day repeatability of carbonization diffusion rate (cm / s)

[0038] sample 1 2 3 4 5 6 MEAN SD CV 1 3.724 3.556 3.457 3.586 3.536 3.625 3.581 0.0899 2.51％ 4 3.302 3.146 3.21 3.119 3.204 3.257 3.206 0.0678 2.12％ 9 3.116 3.112 3.151 3.077 3.131 3.129 3.119 0.0249 0.80％ 10 3.249 3.277 3.336 3.294 3.316 3.279 3.292 0.0309 0.94％ 12 3.227 3.307 3.321 3.241 3.333 3.370 3.300 0.0553 1.68％

[0039] Table 3. Diurnal repeatability of carbonization diffusion rate (cm / s)

[0040] sample 1 2 3 4 5 6 MEAN SD CV 1 3.538 3.576 3.482 3.491 3.522 3.483 3.515 0.0374 1.06％ 4 3.160 3.209 3.093 3.082 3.151 3.127 3.137 0.0468 1.49％ 9 3.066 3.085 2.998 3.012 3.013 3.002 3.029 0.0367 1.21％ 10 3.273 3.291 3.200 3.238 3.240 3.211 3.242 0.0349 1.08％ 12 3.353 3.372 3.269 3.296 3.274 3.283 3.308 0.0437 1.32％

[0041] Table 4 Results of mainstream smoke from regular cigarettes

[0042]

[0043] Table 5. Relationship between mainstream smoke and carbonization diffusion rate of regular cigarettes

[0044]

[0045] Table 6 Results of mainstream smoke from perforated cigarettes

[0046]

[0047] Table 7 Relationship between mainstream smoke and carbonization diffusion rate of perforated cigarettes

[0048]

Claims

1. A method for precisely controlling the release of mainstream cigarette smoke, characterized in that, Includes the following steps: S100. By adjusting one or more parameters of the wood pulp fiber type and content, combustion aid content, basis weight and air permeability of the cigarette paper, cigarette paper is prepared with different carbonization diffusion rates; S200. Cigarettes are prepared from cigarette paper with different carbonization diffusion rates, and the release of CO, TPM, nicotine and tar in the mainstream smoke of each cigarette is continuously monitored. The functional relationship between carbonization diffusion rate and the release of CO, TPM, nicotine and tar in the mainstream smoke is obtained by fitting. S300. Based on the functional relationship in step S200, one or more parameter indicators in step S100 are adjusted to simultaneously regulate the carbonization diffusion rate until the mainstream smoke release of cigarettes reaches the predetermined standard.

2. The method for finely controlling the release of mainstream cigarette smoke according to claim 1, characterized in that, In step S100, the cigarette paper is heated in an oven at 250°C for 40 minutes for carbonization treatment, and the carbonization diffusion rate of the cigarette paper is obtained by a diffusion meter.

3. The method for finely controlling the release of mainstream cigarette smoke according to claim 1, characterized in that, In step S100, the wood pulp fiber includes softwood pulp, hardwood pulp and hemp pulp, and the content of softwood pulp, hardwood pulp and hemp pulp is adjusted in the range of 0% to 100%.

4. The method for finely controlling the release of mainstream cigarette smoke according to claim 1, characterized in that, In step S100, the adjustment range of the combustion improver content is 0.9% to 2.1%.

5. The method for finely controlling the release of mainstream cigarette smoke according to claim 4, characterized in that, The K / Na ratio in the combustion improver can be adjusted within the range of 1.1 to 5.

3.

6. The method for finely controlling the release of mainstream cigarette smoke according to claim 1, characterized in that, The basis weight of the cigarette paper is adjustable within a range of 27 g / m³. 2 ~35g / m 2 .

7. The method for finely controlling the release of mainstream cigarette smoke according to claim 1, characterized in that, The air permeability adjustment range is 40CU to 70CU.

8. The method for finely controlling the release of mainstream cigarette smoke according to claim 1 or 2, characterized in that, Step S100 further includes the following steps: S110. Perform stability verification on the cigarette paper with obtained carbonization diffusion rate. The stability verification includes verifying the intra-day repeatability and inter-day repeatability of carbonization diffusion rate. If the intra-day repeatability of carbonization diffusion rate is ≤3% and the inter-day repeatability of carbonization diffusion rate is ≤1.5%, proceed to the next step. If the intra-day repeatability of carbonization diffusion rate is >3% and / or the inter-day repeatability of carbonization diffusion rate is >1.5%, readjust the parameter indicators until the stability requirements are met.

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