Under the influence of external forces and other factors, the tobacco leaves will overflow in the cells, and the liquid or semi-liquid substances in the cells will overflow. Because of the certain adhesion of the spill and the secretion on the surface of the tobacco leaves, the tobacco leaves will agglomerate in the cigarette pack, so that the tobacco leaves are in appearance. Produce oil immersion marks or plaques, which are known in the industry as tobacco leaf pressure oil or oil. Its existence is one of the important factors that destroy the original quality of tobacco leaves and reduce the use value and grade pass rate. Although the phenomenon of oil pressure has attracted the attention of the tobacco industry and commerce, the phenomenon cannot be effectively controlled due to the relationship between the pressure of tobacco leaf and external factors, and the influence of the structure of the tobacco leaf on the oil production of tobacco leaves. Currently, pressed oil leaves are still ubiquitous. According to the specific adhesion characteristics of the spilled substances in the tobacco leaf cells and the secretions on the surface of the tobacco leaves, the texture analyzer is used to give a certain pressure to the tobacco leaf sample, and after a certain time of extrusion, the probe is pulled up to determine the complete separation between the probe and the tobacco leaf sample. The maximum force, that is, the adhesion of the tobacco leaves after extrusion, establishes the method for determining the adhesion of tobacco leaves; and based on this method, the adhesion of different grades of tobacco leaves is analyzed, in order to provide a basis for the quality evaluation of tobacco leaves and the selection of tobacco leaves by formulators; At the same time, according to the difference of the adhesion of tobacco leaves, the data support for the re-baking of the leaf, the setting of the silking process parameters, and the pre-pressing packaging, storage and transportation of the tobacco leaves can be provided to reduce the pressure of the tobacco leaf. Sample preparation Ingredients : Sichuan has a total of 23 grades of tobacco in 2009, including 8 upper tobaccos (B2F, B3F, B4F, B1L, B2L, B3L, B4L, B3R) and 8 central smokers (C1F, C2F, C3F, C4F, C1L, C2L). , C3L, C4L), 7 lower smokes (X1F, X2F, X3F, X4F, X1L, X3L, X4L). Preparation of test samples : A sample of tobacco leaves with intact leaves and no obvious dust and no spots on the leaves was selected as the test sample. The test sample was placed in a constant temperature and humidity environment at a temperature of (20 ± 2) ° C and humidity (75 ± 5)% for 48 h, and then the tip and tip of the sample were removed, leaving a 10 cm long intermediate portion. The tobacco leaves were then cut into strips having a width of 2 cm in the vertical direction of the main vein, and the main vein was excised to form 10 test samples. Finally, 10 pieces of tobacco leaf samples were stacked face up, and the texture was pressed for 3600 s with 5000 g induction force for testing. Fixation of the test sample: The test leaf sample is face up and fixed on the pressure probe under the premise of ensuring the smoke sample vein of the test tobacco leaf sample in contact with the pressure probe. PDRN Cell Regeneration Skinbooster Pdrn Cell Regeneration Skinbooster,Pdrn Skin Repairing Solution,Pdrn Revitalization Injection ,Pdrn Cell Regation Skinbooster Jiangsu Tiera Biotechnology Co., Ltd , https://www.tierabio.com
2. Experimental conditions preparation <br> Instruments: LLOYD brand TA1 texture analyzer probe: 36mm diameter stainless steel probe FG/36R
Test mode: Compression Test conditions: speed before test 0.5mm/s, test speed 0.5mm/s. Target mode: 4500g stress, extrusion time: 240s, test speed 0.5mm/s.
3. Test results 
The adhesion of 23 grade tobacco leaf samples in Sichuan in 2009 was determined and the average value of tobacco leaf adhesion in different parts was calculated. The results are shown in Figures 6-9. It can be seen from Fig. 6 that the higher the quality grade of the tobacco leaves in the lower tobacco leaves, the greater the adhesion. The XIF adhesion is the largest, which is 1078.887 g, and the X4L adhesion is the smallest, 105.641 g. From Fig. 7, the middle tobacco leaves are known. In addition to the higher adhesion of C1L and C4L tobacco leaves, the adhesion of other grades of tobacco leaves was not obvious, among which C1L had the highest adhesion, 1090.636 g, and C3F had the least adhesion, which was 329.621 g; It can be seen that except for B3L in the upper tobacco leaves, the other grades of tobacco leaves basically show the higher the quality grade, and the adhesion is greater. Among them, B3L has the highest adhesion, 932.846 g, and B4L has the smallest adhesion, which is 220.484 g; It can be seen from Fig. 9 that there is a significant difference in the adhesion of tobacco leaves in different parts. The overall appearance of the middle tobacco leaves is greater, the upper tobacco leaves are second, and the lower tobacco leaves have a smaller adhesion.
4. Conclusions There are significant differences in the adhesion of 23 different grades of tobacco in Sichuan in 2009. Among them, the quality of tobacco leaves is high, and the adhesion is also large, especially in the upper and lower leaves. From the average of the adhesion of tobacco leaves in different parts, the overall adhesion of the central tobacco leaves was larger, followed by the upper tobacco leaves and the lower adhesion of the lower tobacco leaves.