挤干辊用非织造布的浸渍处理工艺优化

Optimization of impregnation process of nonwovens for extrusion roller

为进一步提高挤干辊用针刺非织造布的强力和吸液性能,利用Box-Behnken响应面法对浸渍工艺进行优化。以黏合剂固含量、烘燥温度和烘燥时间为自变量,以湿态断裂强力和吸水倍率为响应值,设计三因素三水平的实验方案并建立回归方程模型;用该模型预测浸渍处理后的非织造材料湿态断裂强力和吸水倍率,效果较好。预测结果表明:影响浸渍处理后非织造材料湿态强力的因素主次顺序为黏合剂固含量、烘燥时间、烘燥温度;影响浸渍处理后非织造材料吸水倍率的因素主次顺序为黏合剂固含量、烘燥温度、烘燥时间;最佳的浸渍处理工艺参数为黏合剂固含量50%,烘燥温度113℃,烘燥时间25 min。优化后的非织造材料与市面上材料相比断裂强力提高了71%,吸水倍率提高了31%。

In order to further improve the strength and liquid absorption performance of needle punched nonwovens rollers,Box-Behnken response surface method was used to optimize the impregnation process.With the binder content,drying temperature and drying time as independent variables,wet breaking strength and water absorption ratio as response values,the experimental scheme of three factors and three levels was designed and the regression equation model was established.This model is used to well predict the wet breaking strength and water absorption of nonwovens after impregnation treatment.The predicted results indicate that the factors influencing wet breaking strength of nonwovens after impregnation treatment are adhesive content,drying time and drying temperature in the primary and secondary order;the factors influencing water absorption of nonwovens after impregnation treatment are adhesive content,drying temperature and drying temperature in the primary and secondary order dry time;the optimum process parameters were binder content 50%,drying temperature 113℃,drying time 25 min.The breaking strength of the optimized nonwovens is 71%higher than that of the market materials,and the water absorption ratio is 31%.