节水节能凝固工艺制备超细纤维合成革贝斯

A water and energy saving solidification process for preparation of microfiber synthetic leather base

针对水性聚氨酯含浸制备超细纤维合成革贝斯现有的凝固工艺（即直接烘干凝固和盐浴凝固）中存在的能耗高、产生高盐废水的问题．提出了一种节水节能的凝固工艺。即碱液凝固工艺。将超细纤维无纺布用阳离子型水性聚氨酯含浸后，置于10％NaOH水溶液中使树脂凝固，再直接置于热碱液中减量，水洗烘干，得到超细纤维合成革贝斯。比较了3种凝固工艺在凝固过程中产生的废水量及能耗。并对比了超细纤维合成革贝斯的力学性能、染色性能和截面的微观形貌。结果表明：碱液凝固工艺具有节水节能的优点。且制备的超细纤维合成革贝斯的泡感、丰满性、柔软度、撕裂强度和染色深度等性能均有所提升。

To reduce energy consumption and high salt wastewater from present microfiber synthetic leather base solidification process （involving direct drying solidification process and mineral salts solidification process） , a water and energy saving solidification process, namely alkali solidification process base on cationic waterborne polyurethane was proposed. Microfiber non-woven fabric was impregnated with cationic waterborne polyurethane firstly then solidified in NaOH solution. After fully solidification, the impregnated non-woven fabric was placed in 10% NaOH solution for alkali weight- reduction. Then the microfiber synthetic leather base can be obtained. Compared with the wastewater quantity, energy consumption in three kinds of solidification process as well as the morphology structure, mechanical properties and dyeing properties of resultant micro fiber synthetic leather base, it is found that the alkali solidification process is a water and energy saving solidification process, the properties of microfiber synthetic leather base such as bubble-forming property, fullness, softness, tear strength and dyeing depth are all superior to those of the others.