热风非织造材料目前广泛应用于液体护理用医卫材料的贴肤层，但单一结构热风非织造材料的低液体非对称传输特性是制约其应用的主要瓶颈。因此本项目拟利用非溶相共混熔喷原位复合方法，将水平分支结构的纳微米非织造材料与热风非织造材料复合，以获得一种立体分支结构的熔喷/热风非织造复合材料，并围绕其可控制备方法、构效关系和液体非对称传输特性等相关科学问题进行研究。综合实验表征和虚拟结构分析方法，研究工艺-结构-水力学特性间的物理关系，揭示其立体分支结构的调控规律；利用宏观测量辅助有限元微观仿真的方法，考察纳微纤维间及其复合非织造材料环境内的液体输运过程，阐明立体分支结构特征与液体传输特性间的内在联系，建立以液体非对称传输能力指数为目标参数的经验模型。项目实施可为熔喷/热风非织造复合材料的立体分支结构可控制备、液体非对称传输特性的提升提供实验基础和理论依据，并可为设计、制造新型医卫用纺织品提供新思路和新方法。

Through-air bonding nonwovens widely use in the skin layer of medical and hygiene products for liquid caring application at present. However, the low liquid asymmetric transmission characteristics of single-structure through-air bonding nonwovens has become a main bottleneck. Therefore, this project intends to prepare a melt blowing / through-air bonding composite nonwoven with three-dimensional branch structure by combining micro-nanofibrous nonwoven with horizontal branch structure and through-air bonding nonwoven via an in-situ composite method of the incompatible-blending melt blowing process. Moreover, associated scientific issues such as controllable preparation method, structure-effect relationship and liquid asymmetric transport characteristics will be thoroughly studied. The physical correlations among the composite process, structural characteristics and hydraulic characteristics will be systemically examined through summing experimental characterization and virtual structure analysis methods, in order to reveal the regulation of three-dimensional branch structure. In addition, transportation process of the liquid between nano-microfibers and its composite nonwovens environment will be investigated systematically via the scientific methods of macro-measurement aided finite element micro-simulation. Furthermore, this project will clarify the internal relationship between the three-dimensional branch structure and the liquid transport characteristics, and establish an empirical model with the liquid asymmetric transmission capacity index as the target parameters. Implementation of the project will provide experimental and theoretical support for regulation of three-dimensional branch structure and improvement of liquid asymmetric transport characteristic of the melt blowing / through-air bonding composite nonwovens, and also provide a new idea and a new method for the design and development of safe and comfortable new medical and hygiene textiles.