Abstract:

Aiming at the problem that the carbon fiber beraks and damages easily due to brittleness of the yarns during 2-D braiding, the processing performance of carbon fiber filament yarn was analyzed by tensile test and homemade yarn porcelain eye corner wear test. Some precautions during winding yarn tube were discussed. Several tubular fabric of different technological parameters were braided on two-dimensional braiding machine with 24 spindles. The influences of the braiding technology on the appearance and mechanical property of 2-D braided fabrics were studied. The experimental results show that the breaking strength of carbon fiber is 86.39 cN/tex, and much higher than of other fibers. The elongation at break is 1.12%, but the extensibility is poor. The factors influencing the wear degree of carbon fiber in the guide yarn eye successively are take-away force, guide yarn angle and braiding speed. Under the condition that the number of braided yarns is constant, the braiding pitch decreases, mass per unit area of the tubular fabric increases, the pilling is serious, and the tensile fracture strength of the fabric decreases.

Key words: carbon fiber, two dimensional braided, tubular fabric, corner wear test, braiding technology, two-dimensional braiding machine with 24 spindles