针对纺纱成形过程中，高刚性难纺纤维扭转、弯曲变形困难，成纱性能和品质差等技术难题，本项目采用在线降低纤维模量的方式，对高刚性纤维进行柔顺光洁环锭纺纱实验，研究高刚性纤维柔顺光洁环锭纱线成形过程和结构特征，探索柔顺光洁环锭纱线结构成形的关键机理，构建出高刚性纤维柔顺光洁环锭纱线结构的协同成形受力模型、纱线结构模型，推导纱线结构与力学性能间的关系方程，制定出高刚性纤维柔顺光洁环锭纱线成形结构调控方案和法则，指导最优化生产，调控纱线成形结构，纺制出高品质新型纱线，并对高刚性纤维柔顺光洁环锭纱线的织造性能以及面料服用性能进行研究。该项目的成功实施将为柔顺光洁纺纱技术在高刚性短纤维原料纱线成形加工领域的推广应用奠定理论基础。

According to such technical problems as hard torsion, difficult bending deformation, bad yarn formation for high rigid fiber yarn production, online decreasing fiber modulus is applied to improve high rigid fiber yarn formation performance during the Soft-and-Smooth-Ring(denoted as SSR) spinning. Based on SSR spinning experiments for high rigid fibers, this project will conduct the following research items: studying yarn formation process and structure features to unlock the key mechanism of SSR spun yarn structure formation; constructing mechanical model of high rigid fiber SSR spun yarn collaborative formation, and structural model of high rigid fiber SSR spun yarn; deriving equations of the correlation between yarn structure and mechanical properties; establishing structural regulation laws for SSR spun yarn to guide the optimization production and produce the high quality novel yarn; investigating high rigid fiber SSR spun yarn weaving performance and fabric wearability. Successful implementation of this project can provide theoretical foundations for SSR spinning technology application in high rigid staple fiber yarn production.