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Method for evaluating humidity keeping performance of tobacco

A moisture-retaining performance and technology of tobacco, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems that the physical moisture-retaining performance of tobacco and tobacco products cannot be comprehensively evaluated, and it is difficult to change dynamically, so as to reduce errors and save money. cost effect

Active Publication Date: 2013-05-15
ZHENGZHOU TOBACCO RES INST OF CNTC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can qualitatively and partly quantitatively evaluate the moisture retention performance of tobacco or humectant, but the process of tobacco water absorption and water loss is a very long process, generally needing 4 to 5 days to reach equilibrium, and the above method The rate must be measured within the time period satisfying 0.40-Me<1.0 (generally between 0-90 min), so the rate of this method only represents 0-90min It is difficult to fully reflect the dynamic changes of the entire moisture absorption or dehumidification process, and it is impossible to fully evaluate the physical moisturizing properties of tobacco and tobacco products.
[0004] At present, there is no set of intuitive evaluation methods for evaluating the dynamic behavior of shredded tobacco in the whole process of water absorption or water loss from both qualitative and quantitative perspectives, so a It is very necessary to fully reflect the method of moisturizing performance and apply it to tobacco and tobacco products, and the evaluation of moisturizing performance of humectant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022]Accurately weigh 5 g (accurate to 0.0001 g) of shredded tobacco for finished cigarettes (Emperor, 555, Yunyan, Baisha, Hongjinlong), according to the national standard YCT 31-1996 [6] Measure its initial moisture content. In addition, 5 g (accurate to 0.0001 g) of shredded tobacco was accurately weighed and placed on the weighing module (balance) in the tobacco moisture content continuous measuring device (the weighing module was placed at 20 ± 2 °C, and the relative humidity was 40 ± 2% at constant temperature and constant temperature). wet environment), weighing once every 5 minutes, the readings will be automatically transmitted to the data analysis module at the same time, and the measurement will stop when the measurement time reaches 7 days. The data analysis module processes the initial moisture content and the obtained mass-time data to form a series of data points of real-time moisture content of shredded tobacco with respect to time. Fit the moisture content o...

Embodiment 2

[0028] A certain amount of humectants (maltose, xylooligosaccharides, D-sorbitol, xylitol) were sprayed on the cut tobacco samples respectively, and then the samples were placed in a constant temperature and humidity laboratory to balance for 72 h. Accurately weigh 5 g (accurate to 0.0001 g) of balanced cut tobacco to be tested, according to the national standard YCT 31-1996 [6] Measure its initial moisture content by the method, take another 5 g (accurate to 0.0001 g) of shredded tobacco and place it on the weighing module (balance) of the continuous measuring device for tobacco moisture content (the weighing module is placed at 20 ± 2 ℃, and the relative humidity is 40 ± 2% constant temperature and humidity environment), the weight is weighed every 5 minutes, and the readings are transmitted to the data analysis module at the same time, and the measurement is stopped when the measurement time reaches 7 days. The data analysis module processes the initial moisture content and...

Embodiment 3

[0033] Accurately weigh 5 g (accurate to 0.0001 g) of thin slices (A, B, C) of the sample to be tested, according to the national standard YCT 31-1996 [6] method to measure its initial water content. Take another two 5 g (accurate to 0.0001 g) tobacco sheets to be tested and place them on the weighing module (balance) in the tobacco moisture content continuous measuring device (weighing modules are respectively placed at 20 ± 2 ℃, and the relative humidity is 40 ± 2% constant temperature and humidity environment and 20±2 ℃, relative humidity is 80±2% constant temperature and humidity environment), weighing once every 5 minutes, and the readings are automatically transmitted to the data analysis module, and the measurement will stop when the measurement time reaches 7 days . The data analysis module processes the initial moisture content and the obtained mass-time data to form data points of the real-time moisture content of the tobacco sheet with respect to time. Enter the d...

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Abstract

The invention discloses a method for the evaluating humidity keeping performance of tobacco. The method is characterized by comprising the following steps: measuring the initial moisture content of a tobacco sample; measuring the change of cut tobacco weight of the tobacco sample in a constant environment along with the time by utilizing a tobacco moisture content measurement device; calculating moisture content-time data in the tobacco sample according to initial moisture content and tobacco mass-time data; performing nonlinear fitting on the moment value through the moisture content of the tobacco, wherein the fitting curve meets the formula (shown in details); and solving out the average speed of moisture desorption (absorption) in any time of period according to the formula. The moisture desorption (absorption) value serves as the basis of evaluating the humidity keeping performance of the tobacco sample under the condition that the initial moisture content of the tobacco sample is close. The method also can be used for inspecting the humidity keeping performance of a tobacco moisturizing agent, and the scientific reference basis is provided for screening the moisturizing agent. Compared with the conventional method, the method has the advantages of wide application range, high degree of automation, high simplicity and applicability, high accuracy, high repeatability and the like.

Description

[0001] technical field [0002] The invention relates to an evaluation method for the physical moisture retention performance of tobacco. The method measures the dynamic change of the moisture content of tobacco under different humidity conditions, fits the mathematical equation of the moisture absorption and dehumidification process of tobacco, and calculates the moisture content of tobacco in different time zones. The moisture absorption and dehumidification rate can be evaluated qualitatively and quantitatively for the physical moisturizing properties of tobacco. This method can not only be used to evaluate the physical moisture retention properties of different types of tobacco products such as tobacco leaves, shredded tobacco, expanded shredded tobacco, cut stems, leaf packs, and finished cigarettes, but also can be used to evaluate the physical moisture retention properties of humectants. Background technique [0003] The moisture retention performance of tobacco leave...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/00
Inventor 胡军刘菲马骥曾世通何保江胡有持
Owner ZHENGZHOU TOBACCO RES INST OF CNTC
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