Textile Coloration and Finishing (한국염색가공학회지)

The Korean Society of Dyers and Finishers (한국염색가공학회)
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A Study of Dyeing Properties of PET Fabrics under Supercritical CO2 Depending on Test Condition: by Temperature, Pressure, Leveling Time

초임계 유체 염색 조건에 따른 PET 섬유의 염색 특성: 온도별, 압력별, 시간별

  • Received : 2018.12.17
  • Accepted : 2019.02.22
  • Published : 2019.03.27
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Abstract

In this study, dyeability of PET fabric was investigated depending on dyeing temperature, pressure, and leveling time using laboratory scale supercritical $CO_2(scCO_2)$ dyeing machine. Dyeing temperature, pressure, leveling time were varied from 100, 120, $130^{\circ}C$, 150, 200, 250bar, 40, 60, 80, 100min, respectively. It is proved that the higher temperature of $scCO_2$ 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, $scCO_2$ 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 $scCO_2$ dyeing process is $120^{\circ}C$, 250bar for 60 - 100min of leveling time.

Keywords

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Figure 1. Chemical structure of Disperse Red 167.

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Figure 2. Absorbance of dyestuff(Disperse Red 167).

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Figure 3. K/S values of weight of conditions by tem-perature.

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Figure 4. Sample of dyed by 150bar.

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Figure 5. K/S values of weight of conditions by pressure.

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Figure 6. K/S values of weight of conditions by level-ing time.

Table 1. Fabric sample and dyestuff and equipment

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Table 2. Conditions of dye solubility experiment

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Table 3. Dyeing experiment conditions by temperature

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Table 4. Dyeing experiment conditions by pressure

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Table 5. Dyeing experiment conditions by leveling time

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Table 6. Grade of washing fastness of conditions by temperature

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Table 7. Color change of conditions by temperature

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Table 8. Color coordinates of conditions by temperature

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Table 9. K/S values of weight of conditions by temperature

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Table 10. Unfixed dyes of weight of conditions by temperature

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Table 11. Grade of washing fastness of conditions by leveling time

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Table 12. Color change of conditions by pressure

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Table 13. Color coordinates of conditions by pressure

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Table 14. K/S values of weight of conditions by pressure

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Table 15. Unfixed dyes of weight of conditions by pressure

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Table 16. Grade of washing fastness of conditions by leveling time

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Table 17. Color change of conditions by leveling time

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Table 18. Color coordinates of conditions by leveling time

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Table 19. K/S values of weight of conditions by leveling time

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Table 20. Unfixed dyes of weight of conditions by leveling time

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