单一材料TPEE防水透湿面料的制备及性能OA

Under the guidance of the dual-carbon strategy goals,the concept of sustainable development has deeply penetrated the manufacturing industry.With the improvement of people's living standards,fast-moving consumer goods clothing has undergone iterative upgrades,and the demand for high-strength and high-tensile polyester fibers has been continuously increasing.The huge annual production volume has brought about the problem of waste fabric resourceization and recycling,which has become the focus of the industry.However,in the step of laminated fabric recovery,there is often inconsistency between the film and the fabric components,and it is necessary to first separate and then recycle separately,making the recovery of composite fabrics difficult and the utilization rate low,causing a serious burden on the environment. In response to the above problems,this paper uses TPEE as the raw material.Its hard segment structure is consistent with the chemical structure of polyester fabric.The TPEE waterproof and breathable microporous membrane is prepared by the thermally induced phase separation method,and after hot pressing,a uniform laminated composite fabric can be obtained.The molecular weight distribution and melt flow rate of TPEE are analyzed by gel permeation chromatography(GPC)and melt index instrument(MFI).The TPEE masterbatch is preliminarily screened by scanning electron microscope(SEM),tensile strength tester,and air permeability test,and the performance indicators such as membrane pore size,porosity,breathability,and waterproofness are further tested to explore the influence of the preparation process and fabric structure on the waterproof performance and breathability of the composite fabric.Through experimental design,high-performance laminated fabrics are achieved to alleviate the pressure of the subsequent recovery process. The experimental results show that as the molecular weight of TPEE increases,the surface of the microporous membrane easily forms a smooth and uniform,fine pore structure,which is conducive to the improvement of the membrane strength.In the film preparation process,the replacement time,quenching temperature,and the concentration of the pore-forming agent all have significant effects on the various properties of the film.Increasing the quenching temperature and the mass fraction of the porogen markedly coarsens the pore structure,which enhances moisture permeability while maintaining waterproof performance.The final results show that the preparation process suitable for the production of laminated composite fabric films requires a replacement time of 4 hours in ethanol,a quenching temperature of 20℃,and a pore-forming agent content of 7%.Under these conditions,the film has a breathability of 6,281 g/(m2·d),a static water pressure resistance of 63.26 kPa,a tensile elongation rate of 910%,and a tensile strength of 10.5 MPa.Subsequently,different fabric structures of polyester are laminated with it,and the water pressure resistance effect can reach 161.82 kPa,and the water resistance grade is level 5.The single-material exterior fabric prepared in this study has excellent comprehensive performance and can provide reference for the wide application of physical one-step recovery of polyester materials in the development of waterproof and breathable fabric in the field.