Journal Textile Coloration and Finishing Year / Vol., Issue, Month 2022 / V.34,no.3,Sept Title Preparation and Physical Properties of Biodegradable High Performance PLA Fiber using Process Parameters Authors Woo Chang Jeung1, Sam Soo Kim2, Sang Oh Lee3, and Jaewoong Lee2 Institution/Affiliations 1Korea Textile Deveropment Institute, 2Yeungnam University, 3Yeungnam University Pages/Total page pp.197 ~ 206 / 10 Language Korean Abstract The purpose of this study was to confirm the optimal spinning conditions for PLA (Polylactic acid) as a fiber forming polymer. According to the melt spinning test results of PLA, the optimal spinning temperature was 258℃. However, it needs to note that relatively high pack pressure was required for spinning at 258°C. At an elevated temperature, 262℃, mono filament was broken easily due to hydrolysis of PLA at a higher temperature. In case of fiber strength, it was confirmed that the draw ratios of 2.7 to 3.3 were optimal for maximum strength of melt spun PLA. Above the draw ratio, 3.3, the strength of the PLA fibers was lowered. It was presumed that cleavage of the PLA polymer chain over maximum elongation. The heat setting temperature of GR (Godet roller) showed that the maximum strength of the PLA fibers was revealed around 100℃. The degree of crystallinity and the strength of the PLA fibers were decreased above 100℃. The optimal take-up speed (Spinning speed) was around 4,000m/min. Thermal analysis of PLA showed 170℃ and 57℃ as Tm (melting temperature) and Tg (glass transition temperature), respectively. Keywords polylactic acid, melt spinning, PLA fiber, spinning condition, spinning analysis Download   Reference http://koreascience.or.kr/journal/OSGGBT/v34n3.page