摘要:
采用色差仪定量测定卷烟在制品色泽的方法,研究了真空回潮、贮叶、切丝和叶丝滚筒干燥工序中加工参数对叶片和叶丝色泽的影响,结果表明:采用两周期真空回潮,叶片色泽比一周期真空回潮明显变差;采用一周期真空回潮,随着增湿温度的升高,保温和反抽时间的延长,叶片色泽逐渐变差.随着贮存环境温度和相对湿度的升高,贮存时间的延长,贮后叶片明度下降,色差增大,叶片的色泽变差.随着切丝时叶片含水率和刀门压力的增大,切后叶丝明度下降,色差增大,色泽变差.不同叶丝滚筒干燥强度对叶丝的色泽影响不大.试验确定的保持叶片和叶丝色泽的较佳工艺条件为:一周期真空回潮,较轻的处理强度(增湿温度≤55℃,保温时间≤50 s,反抽时间≤70 s),叶片贮存环境温度26℃,相对湿度63%,贮存时间2~8 h,切丝含水率低于18.5%,刀门压力控制在0.2 MPa以下,滚筒干燥热风温度105℃,筒壁温度125℃.
Abstract:
The effects of processing parameters of vacuum conditioning,tobacco leaf storage,cutting,and cut tobacco roller drying processing on tobacco leaf cut tobacco product's color and lustre were studied using color difference instrument. The results showed that tobacco leaf brightness and color processed by two cycle vacuum conditioning more decreased than one, and tobacco leaf brightness and color also more decreased when conditioning temperature increased,time of keeping temperature and time of vacuum pumping longer in one cycle vacuum conditioning. Tobacco leaf brightness and color decreased more,color increases,color and lustre worse when temperature and humidity of storage environment increased and time of storage became longer. Cut tobacco brightness and color decreased more,color increased,color and lustre were worse when moisture content of tobacco and cutter mouthpiece pressure increased. The color had little influence on cut tobacco roller drying. According to the experiments results,the preferable process conditions were determined to keep excellent color and lustre of tobacco leaf and cut tobacco,which were one cycle vacuum conditioning,lighter processed strength(conditioning temperature was less than or equal to 55℃,time of keeping temperature and vacuum pumping were less than or equal to 50 s and 70 s); tem-perature and humidity of storage environment were 26℃ and 63% respectively,time of leaf storage was 2~8 h; moisture content of cutting was below 18.5%, and cutter mouthpiece pressure was below 0.2 MPa,the hot air temperature was 105℃ and the temperature of the tube wall of roller was 125℃.
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