摘要
为全面评价造纸法再造烟叶物理性能,对比了传统的抗张强度仪和零距离抗张强度仪测试原理,分析并讨论了两仪器测试结果的差异、比较了样品测试后的截面微观结构的不同。结果表明:①再造烟叶基片样品的横向抗张强度平均为0.21 kN/m,远小于纵向抗张强度0.48 kN/m,而基片样品的横向平均裂断长为2.54 mm,也小于其纵向平均裂断长3.11 mm;②再造烟叶基片样品的纵向干法零距离抗张强度平均为28.31 N/cm,远大于横向干法零距离抗张强度18.08 N/cm,纵向比横向高约36.1%;样品润湿处理后,无论纵向还是横向的零距离抗张强度都有较大幅度的降低;③样品的纵向纤维长度指数平均为0.32,远大于横向纤维长度指数0.10,纵向纤维长度指数比横向高约68.75%。④样品的横向和纵向纤维结合力差异较大,纵向的纤维结合指数为5.23,远大于横向的纤维结合指数1.61。因此,零距离抗张强度仪与传统的抗张强度仪的测试结果具有一致性,但零距离抗张强度仪的测试结果能更全面评价造纸法再造烟叶的物理性能和纤维性能。
In order to evaluate the physical properties of paper-making process reconstituted tobacco comprehensively, the principle of traditional and zero-span tensile strength testers were analyzed, and the test results and the sectional microstructure of samples were compared. The results indicated that： 1） The mean tensile strength of reconstituted tobacco base-sheet samples was 0.21 kN/m in transversal direction （TD） and 0.48 kN/m in longitudinal direction （LD）, and their mean breaking lengths were 2.54 mm in TD and 3.11 mm in LD. 2） The mean zero-span tensile strength of dry reconstituted tobacco base-sheet samples was 18.08 N/cm in TD and 28.31 N/cm （about 36.1% higher than 18.08 N/cm） in LD. After wetting treatment, the tensile strength decreased significantly both in TD and in LD. 3） The mean fiber length index of samples was 0.32 in LD, it was roughly 68.75% higher than 0.10 in TD. 4） The bonding power of fiber significantly differed between TD and LD, the fiber bonding index was 5.23 in LD and 1.61 in TD. The test results of traditional tensile strength tester agreed with those of zero-span tensile strength tester, however the latter reflected the physical and fiber properties of paper making process reconstituted tobacco more comprehensively.
出处
《烟草科技》
EI
CAS
CSCD
北大核心
2016年第11期74-79,共6页
Tobacco Science & Technology
关键词
再造烟叶
物理性能
零距离抗张强度
抗张强度
纤维长度
纤维结合指数
Reconstituted tobacco
Physical property
Zero-span tensile strength
Tensile strength
Fiber length
Fiber bonding index
