Numerical Simulation and Experimental Verification of Melt-Spinning Parameters' Effects on Multi-Leaf Hollow-Profiled...

Area of Science:

• Materials Science
• Polymer Engineering
• Textile Technology

Background:

• Multi-leaf hollow-profiled fibers feature complex structures with external leaf arrangements.
• Existing preparation methods require further study for intricate cross-section patterns.

Purpose of the Study:

• To propose and investigate spinning processes for multi-leaf hollow-profiled fibers with complex cross-sections.
• To analyze key technologies and parameters influencing fiber formation and properties.

Main Methods:

• Design of micro-hole spinnerets and numerical simulations of melt flow.
• Experimental preparation of six-leaf and eight-leaf hollow profiled fibers.
• Systematic variation of melt spinning parameters (flow rate, cooling speed, blowing height, temperature, winding speed).

Main Results:

• Increased volume flow rate and cooling speed enhanced fiber profile degree.
• Increased blowing height and spinning temperature reduced profile degree.
• Winding speed showed minimal impact on the cross-sectional shape.
• Spun fibers exhibited good performance and inherent three-dimensional crimp.

Conclusions:

• Spinning process parameters critically influence the profile degree of multi-leaf hollow-profiled fibers.
• Optimized processes yield fibers with desirable complex cross-sections and functional crimp.
• This research advances the manufacturing of advanced hollow-profiled fibers for various applications.