A method for testing the thermal collapse degree of cigarette filters

Abstract

The present invention relates to a method for testing the thermal collapse degree of cigarette filters, belonging to the technical field of cigarette testing. The method for testing the thermal collapse degree of cigarette filters infers a method for calculating the thermal collapse degree of cigarettes during smoking through experimental data, and performs credibility verification, thereby solving the technical problem that has troubled technicians in accurately judging the thermal collapse degree. The method defines the thermal collapse degree of cigarette filters, can quickly calculate the thermal collapse degree of cigarette filters, provides an important theoretical basis for improving the appearance and smoking taste of cigarettes, saves development costs, and enhances market competitiveness.

Description

Technical Field

[0001] The invention relates to a method for testing the thermal collapse degree of a cigarette filter, belonging to the technical field of cigarette detection. Background Art

[0002] As time progresses, consumers are shifting their focus. They are not only concerned with the taste and inherent quality of cigarettes, but also have higher expectations for their appearance. During the smoking process, the filter gradually softens as heat and moisture accumulate, causing thermal collapse. Excessive thermal collapse can alter the filter's strength and stress levels, impacting both the appearance and the taste of the cigarette. To maintain both the appearance and inherent quality of cigarettes, it is essential to regulate the degree of thermal collapse. Defining the degree of thermal collapse provides an important theoretical basis for improving cigarette appearance and taste, improving quality, meeting consumer expectations, and enabling cigarette brands to better navigate the fierce competition in the market.

[0003] Therefore, a method for testing the thermal collapse degree of cigarette filters was proposed. The thermal collapse degree of cigarette filters was defined and quickly calculated, providing an important theoretical basis for improving the appearance and smoking taste of cigarettes. Summary of the Invention

[0004] In order to overcome the problems existing in the background technology, the present invention infers a method for calculating the degree of thermal collapse of cigarettes during smoking through experimental data and performs credibility verification, thereby solving the technical problem that has troubled technicians in accurately judging the degree of thermal collapse. The degree of thermal collapse of cigarette filters is defined and can be quickly calculated, providing an important theoretical basis for improving the appearance and smoking taste of cigarettes, saving development costs, and enhancing market competitiveness.

[0005] In order to overcome the problems existing in the background technology and solve the above problems, the present invention is implemented through the following technical solutions:

[0006] A method for testing the thermal collapse degree of cigarette filters comprises the following steps:

[0007] Step 1: extracting experimental samples according to cigarette sampling standards, and randomly extracting screened cigarettes from the extracted experimental samples;

[0008] Step 2: placing the cigarettes selected in step 1 in a constant temperature and humidity chamber set according to the atmospheric environment regulated for tobacco and tobacco products for testing for 24 to 48 hours;

[0009] Step 3: Randomly place cigarettes into a smoking machine and perform a smoking experiment according to the total particulate matter and tar standards of conventional cigarette analysis using a smoking machine;

[0010] Step 4: After taking the first puff, perform a hardness test on the filter rod according to the requirements for measuring the physical properties of cigarettes and filter rods;

[0011] Step 5: Statistically record the experimental results and perform data analysis to determine that the change in the degree of thermal collapse of the cigarettes fluctuates within a certain upper and lower limit, thereby grading the degree of thermal collapse;

[0012] Step 6: Determine the calculation formula for the thermal collapse gradient value of the cigarette filter based on the analysis results of step 5:

[0013]

[0014] Where K represents the thermal collapse gradient value, D0 represents the average initial hardness, and D i It represents the average hardness at the end of the puff, and n represents the average number of puffs;

[0015] Step 7: derive the thermal collapse value calculation formula of the cigarette at a certain puff based on the thermal collapse gradient value calculation formula of the cigarette filter:

[0016]

[0017] Where, The average hardness of the filter after a certain number of puffs. When m represents a decimal, it is rounded up.

[0018] Step 8: Credibility verification analysis.

[0019] Preferably, the filter rod hardness test method in step 4 is to place the pressure hammer in the middle of the filter, apply a pressure of 10g, pre-press for 1s, and then apply a force of 300g to test the filter hardness of the cigarette, and repeat this cycle.

[0020] Preferably, the hardness and concavity measured after the first and seventh puffs of the cigarette after lighting it in steps 4 and 5 are not counted in the experimental data.

[0021] Preferably, the filter tip thermal collapse degree levels in step five are level I, level II, level III...n, wherein level I, II and III are mild thermal collapse degrees, IV and V are moderate thermal collapse degrees, and levels V and above are severe thermal collapse degrees.

[0022] Preferably, the reliability analysis process of step eight is to sample a number of cigarettes of different brands greater than the number of test cigarettes under the same experimental conditions to test the degree of filter thermal collapse, determine the normal distribution statistics based on the experimental results, and obtain the sampling error and confidence interval. If the confidence level is greater than 95%, the calculated thermal collapse value is reliable.

[0023] The beneficial effects of the present invention are:

[0024] The present invention infers a method for calculating the degree of thermal collapse of cigarettes during smoking through experimental data and performs credibility verification, thereby solving the technical problem that has troubled technicians in accurately judging the degree of thermal collapse. The method defines the degree of thermal collapse of cigarette filters and can quickly calculate the degree of thermal collapse of cigarette filters, providing an important theoretical basis for improving the appearance and smoking taste of cigarettes, saving development costs, and enhancing market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a flow chart for testing the thermal collapse degree of a cigarette filter of the present invention;

[0026] Figure 2 Schematic diagram showing the change in filter hardness with the number of puffs. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and beneficial effects of the present invention more clear, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to facilitate understanding by technicians.

[0028] like Figure 1-2 As shown, a method for testing the thermal collapse degree of cigarette filters comprises the following steps:

[0029] Step 1: Extract experimental samples according to the cigarette sampling standard. Select two brands of cigarettes from each of the three grades of high, medium and low in the finished product warehouse. Randomly extract a certain number of six experimental samples. Then, extract 50 screened cigarettes from each of the six experimental samples. The test samples are shown in Table 1.

[0030] Table 1 Thermal collapse test samples

[0031] Sample number Sample type Cigarette prices Cigarette grade Cigarette origin 1# Flue-cured tobacco type Category II cigarettes High-end cigarettes Domestic cigarettes 2# Flue-cured tobacco type Category II cigarettes High-end cigarettes Domestic cigarettes 3# Flue-cured tobacco type Three types of cigarettes mid-range cigarettes Domestic cigarettes 4# Flue-cured tobacco type Three types of cigarettes mid-range cigarettes Domestic cigarettes 5# Flue-cured tobacco type Four types of cigarettes Low-end cigarettes Domestic cigarettes 6# Flue-cured tobacco type Four types of cigarettes Low-end cigarettes Domestic cigarettes

[0032] Step 2: Place the cigarettes selected in step 1 in a constant temperature and humidity chamber at a temperature of 22±2° C. and a relative humidity of (60±5)% under standard atmospheric pressure set according to the atmospheric environment for tobacco and tobacco products testing for 24 to 48 hours.

[0033] Step 3: randomly insert cigarettes into a smoking machine and perform a smoking experiment according to the total particulate matter and tar standards of a conventional cigarette analysis smoking machine;

[0034] Step 4: After taking the first puff, perform a hardness test on the filter rod after puffing according to the requirements for measuring the physical properties of cigarettes and filter rods. Turn on the instrument power, preheat it to stabilize it, calibrate the instrument's zero point and full-scale value with a standard rod, and make sure the calibration value of the standard rod matches the instrument's display. Place a cigarette with a known circumference in the instrument's sample slot. Position the hammer in the middle of the filter tip, start the timer at the same time, apply a 10g pressure, and after pre-pressing for 1s, apply a 300g force to test the filter tip hardness of the cigarette. Calculate the filter tip hardness and the amount of depression for each puff, repeating this cycle. The hardness calculation formula is:

[0035]

[0036] Where D is the hardness, a is the amount of depression, and L is the diameter of the cigarette filter.

[0037] Step five, statistically record the experimental results. The hardness and depression measured after the first and seventh puffs of the cigarette after lighting are not included in the experimental data. Data analysis shows that the change in the thermal collapse degree of the cigarette fluctuates within a certain upper and lower limit range, and the thermal collapse degree is graded accordingly. The thermal collapse degree levels of the filter are grade I, grade II, grade III...n, among which grades I, II and III are mild thermal collapse degrees, IV and V are moderate thermal collapse degrees, and grades V and above are severe thermal collapse degrees. The thermal collapse test data and results of the six experimental samples are shown in Table 2.

[0038] Table 2 Thermal collapse test data and results

[0039]

[0040] Step 6: Determine the calculation formula for the thermal collapse gradient value of the cigarette filter based on the analysis results of step 5:

[0041]

[0042] Where K represents the thermal collapse gradient value, D0 represents the average initial hardness, and D i It represents the average hardness at the end of the puff, and n represents the average number of puffs;

[0043] Step 7: derive the thermal collapse value calculation formula of the cigarette at a certain puff based on the thermal collapse gradient value calculation formula of the cigarette filter:

[0044]

[0045]

[0046] Where, The average hardness of the filter after a certain number of puffs. When m represents a decimal, it is rounded up.

[0047] Step 8: Calculate and analyze the reliability. Under the same experimental conditions, 100 cigarettes of different brands were sampled for filter thermal collapse test. Based on the experimental results, the standard deviation, standard deviation, and normal overall mean were calculated to obtain a reliability interval. If the confidence interval is greater than 95%, the thermal collapse value calculation is reliable, that is, the confidence level is 95%. The standard deviation calculation formula is:

[0048]

[0049] Standard deviation calculation formula:

[0050]

[0051] In formula (4) and (5), x i It represents the actual collapse degree of the filter tip of the sample cigarette and the average collapse degree of the filter tip of the sample cigarette, and n is the number of samples;

[0052] The credible interval calculation process is

[0053]

[0054] The confidence interval is α represents the coverage area of the non-confidence level within the normal distribution, That is the corresponding standard score, and then the confidence level is obtained.

[0055] After testing, it was found that the confidence level was above 96%, and the thermal collapse value calculation method was credible.

[0056] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A method for testing the thermal collapse of cigarette filters, characterized by: The method for testing the thermal collapse degree of cigarette filters comprises the following steps: Step 1: extracting experimental samples according to cigarette sampling standards, and randomly extracting screened cigarettes from the extracted experimental samples; Step 2: placing the cigarettes selected in step 1 in a constant temperature and humidity chamber set according to the atmospheric environment regulated for tobacco and tobacco products for testing for 24 to 48 hours; Step 3: Randomly place cigarettes into a smoking machine and perform a smoking experiment according to the total particulate matter and tar standards of conventional cigarette analysis using a smoking machine; Step 4: After taking the first puff, perform a hardness test on the filter rod according to the requirements for measuring the physical properties of cigarettes and filter rods; Step 5: Statistically record the experimental results and perform data analysis to determine that the change in the degree of thermal collapse of the cigarettes fluctuates within a certain upper and lower limit, thereby grading the degree of thermal collapse; Step 6: Determine the calculation formula for the thermal collapse gradient value of the cigarette filter based on the analysis results of step 5: Where K represents the thermal collapse gradient value, D0 represents the average initial hardness, and D i It represents the average hardness at the end of the puff, and n represents the average number of puffs; Step 7: derive the thermal collapse value calculation formula of the cigarette at a certain puff based on the thermal collapse gradient value calculation formula of the cigarette filter: Where, The average hardness of the filter after a certain number of puffs. When m represents a decimal, it is rounded up. Step 8: Credibility verification analysis.

2. The method for testing the thermal collapse of cigarette filters according to claim 1, wherein: The filter rod hardness test method in step 4 is to place the pressure hammer in the middle of the filter, apply a pressure of 10g, pre-press for 1s, and then apply a force of 300g to test the filter hardness of the cigarette, and repeat this cycle.

3. A method for testing the thermal collapse of a cigarette filter according to claim 1 or 2, characterized in that: The hardness and concavity measured after the first and seventh puffs of the cigarette after lighting it in steps 4 and 5 are not included in the experimental data.

4. The method for testing the thermal collapse of a cigarette filter according to claim 1, wherein: The degree of thermal collapse of the filter tip in step five is grade I, grade II, grade III... grade n, wherein grades I, II and III are mild thermal collapse degrees, IV and V are moderate thermal collapse degrees, and grades V and above are severe thermal collapse degrees.

5. The method for testing the thermal collapse of cigarette filters according to claim 1, wherein: The reliability analysis process of step eight is as follows: under the same experimental conditions, a number of cigarettes of different brands greater than the number of test cigarettes are sampled to test the degree of filter thermal collapse. Based on the experimental results, normal distribution statistics are performed to obtain the sampling error and confidence interval. If the confidence level is greater than 95%, the calculated thermal collapse value is reliable.

Images