▎ 摘　　要

NOVELTY - Manufacture of polypropylene spun yarn involves (i) mixing and spinning 4-5 wt.% master batch with 95-96 wt.% of polypropylene, and spinning the obtained spun polypropylene fiber based on a ring compact to form a spun yarn, (ii) dyeing a color to the spun yarn and forming a graphene coating layer on the surface of the spun yarn by aqueous coating, oil coating, or lamination coating, and (iii) weaving a fabric using a warp beam generated through a heat setting and sizing process at 90-100 degrees C after additional twisting the several coated spun yarns and post treating by maintaining a temperature below 125 degrees C to maintain the texture of the fabric using a furnace. In the coating step, the prepared spun yarn is immersed by placing the graphene-containing aqueous coating agent or oil coating agent in a fresh water immersion tank. The coating agent comprises a porous material and a processing solvent with graphene powder. The porous material is a sericite powder having particle size of 40 nm. USE - Manufacture of polypropylene spun yarn used for textiles. ADVANTAGE - The method enables manufacture of high quality polypropylene spun yarn. The graphene which improve the wearer's physical functions such as deodorization, energizing, and far-infrared radiation, is coated to provide polypropylene spun yarn with excellent performance compared to the existing one. The ring compact method significantly reduces the occurrence of pilling, and provides improved utilization rate and high-quality polypropylene spun yarn. DETAILED DESCRIPTION - Manufacture of polypropylene spun yarn involves (i) mixing and spinning 4-5 wt.% master batch with 95-96 wt.% of polypropylene, and spinning the obtained spun polypropylene fiber based on a ring compact to form a spun yarn, (ii) dyeing a color to the spun yarn and forming a graphene coating layer on the surface of the spun yarn by aqueous coating, oil coating, or lamination coating, and (iii) weaving a fabric using a warp beam generated through a heat setting and sizing process at 90- 100 degrees C after additional twisting the several coated spun yarns and post treating by maintaining a temperature below 125 degrees C to maintain the texture of the fabric using a furnace. In the spinning step, the melting temperature of the extruder divided into nine portions is set to 250-290 degrees C, the melting index is set to 16, and then spun having denier of 1.6 and the spinning step is based on the polypropylene fiber ring compact method and performed by performing soft-making, milling, and spinning processes, sucking air to remove the air layer remaining inside the yarn, and twisting the yarn with a set tension while arranging the yarn in parallel and making the minimum number of filaments of 80 or more when producing 40 polypropylene spun yarns with denier of 135 by the ring compact method. The dyeing process is a pretreatment process using a refining agent, and a disperse dye, and by reduced cleaning process using a reduced bleach and caustic soda to obtain spun yarn with the desired color. The pretreatment process is pretreated at 70-80 degrees C for 18-20 minutes after adding 3/l scouring agent to the spun yarn and adding the disperse dye to the spun yarn in a weight ratio of 1:2 to form pH of 4-4.5, and adding dispersant, and performing dyeing at 120-130 degrees C for 40-45 minutes. The reduction cleaning process is performed by decomposing portion of the dye for 15-20 minutes at a low temperature condition of 70 degrees C or less after adding reduced bleach and caustic soda to the spun yarn. In the coating step, the prepared spun yarn is immersed by placing the graphene-containing aqueous coating agent or oil coating agent in a fresh water immersion tank. The coating agent comprises a porous material and a processing solvent with graphene powder as a main axis. The porous material is a sericite powder having particle size of 40 nm.