The present invention expresses properties similar to nylon 66, is easy to dye and post-process, and has excellent functional properties such as dimensional stability and air permeability, and is a lightweight and high-strength property that can be used for a paragliding fabric that can withstand wind pressure with a single yarn fineness of 1.5~ 1.7d class fineness also relates to a method of manufacturing high strength polyester triangular cross-section filaments.
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