运动鞋用水性聚氨酯超细纤维合成革贝斯的制备及性能研究

Preparation and Performance Study of Waterborne Polyurethane Ultrafine Fiber Synthetic Leather Substrate for Sports Shoes

为了有效解决运动鞋制造领域用溶剂型聚氨酯浸渍制备超细纤维合成革贝斯的污染问题与溶剂残留超标问题,本文基于水性聚氨酯以水为介质,且环保、无毒、不燃、气味小等特性,以浸渍工艺制备了运动鞋用水性聚氨酯超细纤维合成革贝斯,并对其性能进行了测试表征。结果发现,随着水性聚氨酯含量的增加,浸渍合成革贝斯减量、厚度与表观密度皆显著增大,柔软度明显变差,吸水度与透气性先降低后升高,透水汽性变化不显著,拉伸强度与断裂伸长率变化不明显,撕裂强度减小;相较于溶剂型聚氨酯浸渍,水性聚氨酯浸渍超细纤维合成革贝斯减量率相对偏低,力学性能相对较差,厚度、表观密度、柔软度、吸水度、透气性及透水汽性皆显著提高;溶剂型聚氨酯浸渍超细纤维合成革贝斯表面纤维蓬松,手感良好,但孔洞较多,水性聚氨酯浸渍超细纤维合成革贝斯表面纤维呈束状,手感稍显粗糙,但孔洞较少,整体更显丰满。

In order to effectively solve the pollution problem and solvent residue exceeding the standard in the field of sports shoes manufacturing using solvent based polyurethane impregnation to prepare ultrafine fiber synthetic leather bass,based on the characteristics of waterborne polyurethane using water as the medium,environmental protection,non-toxic,non flammable,and low odor,waterborne polyurethane ultrafine fiber synthetic leather substrate for sports shoes was prepared using impregnation process,and its performance was tested and characterized.The results show that as the content of waterborne polyurethane increases,the weight,thickness,and apparent density of the impregna⁃ted ultrafine fiber synthetic leather decreases,while the softness decreases,the water absorption and permeability first decreases and then increases,while the changes in water vapor permeability are not significant,the changes in tensile strength and elongation at break are not significant,while the tearing strength decreases.Compared to solvent based polyurethane impregnation,waterborne polyurethane impregnation of ultrafine fiber synthetic leather has a relatively low weight reduction rate and poor mechanical properties,while thickness,apparent density,softness,water absorp⁃tion,breathability,and water vapor permeability are significantly improved.The surface fibers of solvent-based polyu⁃rethane impregnated ultrafine fibers are fluffy and have a good feel,but there are many voids.However,the surface fibers of waterborne polyurethane impregnated ultrafine fibers are in a bundle shape,with a slightly rough feel but fe⁃wer voids,making the overall appearance more plump.