^(60)Co γ辐照对抽真空复合包装材料性能影响初探

PRIMARY STUDY ON THE EFFECT OF ^(60)Co γ-IRRADIATION ON VACUUM-PACKAGE MULTILAYER FILMS

对经0～10kGy剂量60Coγ射线照射的两种抽真空复合包装袋(CPP/nylon/PE和PP/Al/PE)的力学、阻隔性能进行了测试,并利用环境扫描电镜对包装膜的断面结构进行了观察。结果显示,辐照后CPP/nylon/PE膜透氧系数变化显著,伸长率及透湿率变化极显著;PP/Al/PE膜透湿率及透氧系数变化显著,抗拉强度及伸长率变化极显著。

CPP/nylon/PE and PP/Al/PE were irradiated by different doses of γ-rays,and the mechanical and barrier properties of the packages were tested.Environment Scanning Electron Microscopy was used to observe the cross-section structure of the package films.Results showed that the oxygen-through rate of CPP/nylon/PE was changed significantly（P〈0.05）,and the elongation and water-vapor through rate were changed very significantly（P〈0.01）;The change of water-vapor through rate and oxygen through rate of PP/Al/PE were changed significantly（P〈0.05）,and the change of tensile strength and elongation rate were changed very significantly（P〈0.01）.