High uniformity ultra-high molecular weight polyethylene fiber and preparation method thereof

Abstract

The present invention relates to a high-uniformity ultra-high molecular weight polyethylene fiber and a preparation method thereof, the method comprising fully mixing ultra-high molecular weight polyethylene resin powder, solvent and additives, and dissolving them in a screw after swelling to obtain an ultra-high molecular weight polyethylene solution; homogenizing the obtained ultra-high molecular weight polyethylene solution for a preset time, and then entering a spinning box; extruding and molding, and obtaining the obtained frozen gel filaments, and then desolventizing and heat stretching to obtain ultra-high molecular weight polyethylene fibers. Compared with the prior art, the present invention homogenizes the formed solution, thereby improving the orientation of macromolecules in the solution and improving the performance of the finished product, while reducing the size of the gel particles or reducing the number of gel particles, improving the uniformity of the solution, and finally obtaining a fiber with good mechanical properties, low variation rate, and good thermal stability.

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