METHOD FOR MANUFACTURING OF POLYESTER STAPLE FIBER AND NON-WOVEN USING THEREOF

摘要

The objective of the present invention is to provide a non-woven fabric for civil engineering that has water repellency and water permeability at the same time. To this end, the present invention discloses a polyester staple fiber manufacturing method including: a spinning step of melting a polyester resin at 280 to 300 degrees Celsius and spinning it at a spinning speed of 1,000 to 1,500 m/min; a drawing step of immersing the spun undrawn yarn in a silicone emulsion immersion bath having a temperature of 85 to 90 degrees Celsius and drawing it at a draw ratio of 1.5 to 4.0 and a drawing speed of 50 to 150 m/min; a thermal fixing step of performing a heat treatment on the drawn yarn by passing it through a heating roll (hot godet roll) having a temperature of 130 to 170 degrees Celsius; a primary silicone coating step of performing silicone emulsion injection and coating at a rate of 7.5 L per hour on the surface of the drawn yarn moving at a line speed of 120 to 130 m/sec through the thermal fixing step; a crimping step of forming 8 to 10 crimps per inch in the Silicone-coated drawn yarn; a secondary silicone coating step of performing silicone emulsion injection and coating at a rate of 7.5 L per hour on the surface of the crimped yarn; a primary cooling step of cooling the crimped yarn after the secondary silicone coating for 50 to 60 minutes, at a temperature of 15 to 25 degrees Celsius, and at a wind speed of 1 to 1.5 m/sec; a setting step of thermally fixing the cooled crimped yarn for 30 to 40 minutes, at a temperature of 130 to 170 degrees Celsius, and at a wind speed of 1 to 1.5 m/sec; a secondary cooling step of cooling the thermally fixed crimped yarn for 50 to 60 minutes, at a temperature of 15 to 25 degrees Celsius, and at a wind speed of 1 to 1.5 m/sec; and a cutting step of cutting the crimped yarn into the staple fiber after the secondary cooling.