Study on Rapid Determination Method of Coating Rate of Paper-making Reconstituted Tobacco
[Objective]In view of the inconsistency in the specific testing instruments,testing methods,testing conditions,precision,accuracy and other aspects of the existing rapid detection of coating rate in the tobacco industry,and the problems of low timeliness and hysteresis in the existing classical oven method detection.[Method]On the basis of the classical oven method to measure the coating rate,the plate drying method was used to explore the effects of drying temperature,drying time and the number of drying sheets on the coating rate,at the same time,the precision,reproducibility and accuracy of the rapid determination method were verified.[Result]Finally,the optimal detection conditions for the rapid determination of the coating rate of reconstituted tobacco leaves by the plate drying method were optimized and determined as follows:the drying temperature is 120℃,the drying time is 3 minutes,and the number of drying sheets is 6;The relative standard deviation of the repeatability experiment is less than 2.00%,and the RSD of the intermediate precision is less than 2.00%;the RSD of the coating rate results of the same sample measured between different laboratories is less than 2.00%;Small difference between the coverage of the measured samples and the coverage of the design samples[Con-clusion]Plate drying method can be used as a method for online monitoring and rapid determination of coating rate by production enterprises,which is of great significance for adjusting production process parameters and improving the quality stability of finished products.
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