Journal Textile Coloration and Finishing Year / Vol., Issue, Month 2019 / V.31,no.1,Mar Title A Study of Dyeing Properties of PET Fabrics under Supercritical CO2 Depending on Test Condition: by Temperature, Pressure, Leveling Time Authors Hyunseuk Choi*, Shin Park1, Taeyoung Kim1 and Taehyun Song1 Institution/Affiliations DYETEC, 1Daejoo Machinery Pages/Total page pp.14 ~ 24 / 11 Language Korean Abstract Abstract In this study, dyeability of PET fabric was investigated depending on dyeing temperature, pressure, and leveling time using laboratory scale supercritical CO2(scCO2) dyeing machine. Dyeing temperature, pressure, leveling time were varied from 100, 120, 130℃, 150, 200, 250bar, 40, 60, 80, 100min, respectively. It is proved that the higher temperature of scCO2 dyeing process, the higher K/S value and the lower L* value, which in turn means the lower amount of dyeing molecules remained after process done. Compared 200bar with 250bar of dyeing pressure, scCO2 dyeing fabrics under 250bar appeared to have a lower L* value, a higher K/S value than those from 200bar, meaning that dyeing color turns to darker with higher dyeing pressure. The experiments showed that the most ideal condition for scCO2 dyeing process is 120℃, 250bar for 60 - 100min of leveling time. Keywords Keywords supercritical fluid, carbon dioxide, dyeing, dyeability, contact amount, leveling Download   Reference http://www.koreascience.or.kr/article/ArticleFullRecord.jsp?cn=OSGGBT_2019_v31n1_14&ordernum=