烟用水基包装胶动态流变性能分析及应用OA

To optimize the water-based packaging adhesives for cigarette packet packers and address issues of poor packet sealing and equipment operational instability caused by differences in the dynamic rheological properties of the adhesives,three water-based packaging adhesives were studied.The adhesive properties such as temperature dependence,shear thinning effect,thixotropic recovery,and wet tack were analyzed,and the effects of shear rate and temperature on adhesive viscosity were investigated.Machine validation was conducted on a ZB48B packer.The results showed that:1)Adhesive B exhibited the strongest shear thinning effect(n=0.17),relatively good thixotropic recovery(60.15%viscosity recovery 2 s after shear cessation)and strong wet tack property(F=5.36 N),making it suitable for adhesive spraying process;2)Under high tempreture conditions,adhesive C demonstrated the best viscosity retention(A=2.48 Pa·s),the weakest shear thinning effect(n=0.86),the strongest thixotropic recovery(70.79%viscosity recovery 2 s after shear cessation)and the strongest wet tack property(F=6.62 N),making it suitable for the roller coating processes;3)Production validation confirmed that using adhesive B in the spraying process reduced adhesive residue accumulation.When using adhesive C in the roller coating process,no packet open defects or noticeable adhesive residue buildups were observed,which significantly enhanced the operational quality of the packaging equipment.This study provides a theoretical basis for the precise selection and process optimization of water-based packaging adhesives for cigarettes.