The Research Of ES Non-woven Silicon Free Hydrophilic Finishing Agent

With the technological upgrading of diaper and the expansion of the diaper market,the comfort of the diaper is improved.ES fiber with soft and comfortable,good permeability and no stimulation become the surface materials of diaper.However,untreated polyolefin or polyester fibers are not suitable for this particular application because,in view of their hydrophobic surface,they are not sufficiently permeable to aqueous liquids.Accordingly,the surface of ES fiber has to be made hydrophilic by a corresponding finish.In this paper,a non-silicon hydrophilic finishing agent for ES non-woven was developed.The interfacial properties of surfactant solution and its spreading properties at the interface of ES fiber were studied.Then the principle and the influence factors of multiple hydrophilicity were analyzed.The researchs on the multiple hydrophilicity are as follows.The surface tension and dynamic contact angle of iso-aliphatic ether,straight chain fatty alcohol ether,antistatic agent and amphoteric surfactant were studied.The relationship between the configuration of surfactant and the dynamic contact angle of ES fiber interface was obtained.The multiple hydrophilicity of various surfactants and some finishing agents were discussed.The effects of different surfactants on the multiple hydrophilicity of non-woven and the synergism of one-component surfactant in finishing agent were obtained.On the based of this,the preparation of silicone-free hydrophilic finishing agents were carried out.The surface tension,reverse osmosis and dynamic contact angle of silicone-free hydrophilic finishing agent were studied.The micelle aggregation number of the finishing agent solution was determined by fluorescence probe and the surface morphology of the finished ES nonwoven were observed by SEM,then the key factors of the multiple hydrophilicity of ES nonwoven were analyzed.The main conclusions of this thesis are as follows.The surface tension of the surfactant solution is lower than the interfacial tension of ES fiber,which is the precondition of wetting the ES fiber by the surfactant.The surface tension of Lexxico iso-alcohol ether,iso-decanol polyoxyethylene ether and straight chain fatty alcohol ether is positively correlated with EO number.When the EO number of surfactants are less than 8,its wettability on PE is better,such as the surface tension is under 30 mn/m and?_e is less than 20°.When the EO number of surfactants are the same,the contact angle of iso-decanolether polyoxyethylene ether on PE is smaller than that of Lexxico iso-alcohol ether,and the spreading speed of iso-decanolether polyoxyethylene ether is faster than that of Lexxico iso-alcohol ether.Isomeric aliphatic alcohol ethers have better multiple hydrophilicity than straight chain fatty alcohol ether.Hydrophilic finish with 1308,ampho-surfactant and AEO-9 contributes to the multiple hydrophilic time.It can be seen that a non-woven treated with LX-1 and LX-2 still produces liquid strike-through times of at less 5 seconds at the fith measurement.At the same time,other indicators meet the production requirements of es non-woven,for example,the surface tension are around 30 mN·m^-1,the amount of back infiltration is within 0.13g,surface specific resistance is less than 10⁹??13?cm.The micellar aggregation number in LX-1 and LX-2 are large by steady-state fluorescence probe method.The surface morphology of ES fiber treated with hydrophilic finish has a large"cluster"aggregates by SEM.The surfactant in hydrophilic agent solution is adsorbed on the interface of ES fiber by intermolecular force and electrostatic interaction.Therefore,The"cluster"aggregates of surfactants can increase the intermolecular force,and the multiple hydrophilicityis better.