梯度结构的聚酯/粘胶热风非织造材料及液体非对称传输特性

为增强医卫用非织造材料内的液体扩散差异性,制备了梯度结构的聚酯/粘胶热风非织造材料,并对样品结构形态和液体扩散特性进行实验分析。实验结果表明:细度差异显著的粘胶纤维、双组分纤维和聚酯纤维在预针刺-热风的复合固结作用下紧密缠结在一起形成上层(蓬松舒适层)疏松多孔、下层(致密分流层)致密的双层梯度结构。同时,随着致密分流层的粘胶纤维含量从50 %增大到80 %,液体水在样品上扩散面积与下表面扩散面积的比值从1.39增大到1.93,由此可以通过调控梯度结构的涤粘热风非织造材料的结构特征来控制上下层的液体扩散面积,进而扩大液体传输的非对称传输特性。

Polyester/viscose hot-air nonwoven material with gradient structure and its liquid asymmetric transfer properties

In order to enhance the difference of liquid diffusion in medical hygienic nonwoven materials, the polyester / viscose hot-air bonding nonwoven materials with gradient structure were prepared, and the structure morphology and liquid diffusion properties were analyzed experimentally. The results show that, viscose fibers, bicomponent fibers and polyester fibers with significant fineness differences were tangled each other to form the fiber webs with double-layer gradient structure under the effect of pre-needling and hot-air bonding, and the fiber webs consisted of the porous upper layer (fluffy layer) and the lower layer (dense layer). Meanwhile, as viscose fiber content of dense layer increased from 50 % to 80 %, the specific value of liquid diffusion area on the sample and lower surface diffusion area increased from 1.39 to 1.93. Experimental results reveal that, the liquid diffusion area at the upper and lower layers can be controlled by adjusting the structural characteristics of polyester/viscose hot-air bonding nonwoven materials with gradient structure, and the asymmetric transfer characteristics of liquid transfer can be enlarged.