聚乙烯-聚丙烯非织造布亲水油剂的性能及其调控

Performance and regulation of hydrophilic oil agent for polyethylene-polypropylene nonwoven fabrics

针对亲水油剂研发过程中表面活性剂配伍与聚乙烯-聚丙烯(ES)非织造布亲水性关系的问题,借助稳态荧光猝灭法、视频接触角测定仪、液体穿透时间测定仪等,考察了油剂或表面活性剂的溶液表面张力、胶束聚集数、聚集体粒径分布、聚乙烯(PE)界面动态接触角等性能指标,探讨了表面活性剂结构和协同配伍与ES非织造布多次透水时间的关系,测试了亲水油剂的综合性能。结果表明:亲水油剂的高表面活性、较小的亲水疏水平衡值(HLB值)、较大的胶束聚集数以及有效成分与ES纤维间的强吸附力等均有利于提高ES非织造布亲水性;改性后ES非织造布3次透水时间均小于3 s,反湿量小于0. 13 g,表面比电阻小于3. 0×108Ω·cm,已达到卫生用品覆面材料的要求。

In view of the relationship between the compatibility of surfactants and the hydrophilicity of polyethylene-polypropylene (ES) nonwoven fabrics in the development of hydrophilic oil agents, the experimental methods such as steady-state fluorescence quenching method, video contact angle measuring instrument and liquid penetration time measuring instrument were adopted to detect surface tension of the oil or surfactant solution, the number of micelles, the particle size distribution of the aggregates, the dynamic contact angle of the polyethylene (PE) interface. The surfactant structure and synergistic compatibility with the multiple permeable time of the ES nonwoven fabric were discussed, and the comprehensive properties of hydrophilic oil agents were measured. The results show that the high surface activity of the hydrophilic oil agent, the appropriate HLB value, and the large number of micelle aggregation are beneficial to improve the hydrophilicity of the ES nonwoven fabric. The permeable time of 3 times is shorter than 3 s, the moisture resistance is less than 0.13 g, and the surface specific resistance is less than 3.0×10 8 Ω· cm after ES nonwoven fabric is modified by oil agent, which satisfy the requirements of the covering materials used for sanitary products.