Untitled

Mogi, Kimiyo; Kubokawa, Hiroh; Hatakeyama, Tatsuko

doi:10.1023/a:1022216622433

Cited by 11 publications

(4 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These values are similar to those obtained for the standard sample of Fig. 4, indicating that no irreversible changes took place during the dyeing and suggesting that, contrary to results obtained for other systems [5], the crystalline regions were unaffected by this process. The peaks A and B are the results of the thermal treatment at which the sample is submitted during the dyeing.…”

Section: Thermal Analysis Resultssupporting

confidence: 87%

Dyeing of PA 6.6 fibers

Domingues

Gomes

Martins

2003

Journal of Thermal Analysis and Calorimetry

View full text Add to dashboard Cite

Dyeing fibers at low temperatures has many advantages such as savings in energy and avoiding alterations to the physical properties of the fibers being dyed or other fibers also present in blends. The problem of low temperature dyeing in synthetic fibers is that it difficults the dye diffusion into the fiber. In the case of polyamide 6.6 microfibers, by using benzyl alcohol as an auxiliary dyeing, it was shown that good diffusion was obtained for the dye exhaustion with metal complex dyes at temperatures more than 30ºC below the normal dyeing temperature for the dye exhaustion with metal complex dyes. Using thermal analysis methods these results were shown to be caused by the lowering of the T g of the fiber when in the presence of benzyl alcohol.

show abstract

Section: Thermal Analysis Resultssupporting

confidence: 87%

Dyeing of PA 6.6 fibers

Domingues

Gomes

Martins

2003

Journal of Thermal Analysis and Calorimetry

View full text Add to dashboard Cite

show abstract

“…Further investigation of this DSC research was also studied and the results were summerized in Table 1. A remarkable behavior of melting-recrystallization-remelting reported by K. Mogi and H. Kubokawaet al [10] were not observed, implying that the crystallinity of PLA fiber had a improving trend. The data of ∆H m suggested that the crystallinity of dyed sample 1, 2 and 4 increased, while the crystallinity of dyed sample 3 decreased after the heat treatment of dyeing process.…”

Section: Resultsmentioning

confidence: 83%

DSC Studies on the Dyeing Properties of PLA Fiber

Huang

et al. 2013

AMR

View full text Add to dashboard Cite

The dyeing properties of the polylactic acid (PLA) fiber with four different disperse dyes was studied. In the disperse dyeing process, differential scanning calorimeter (DSC) analysis was applied to test and analyze the changes of the glass-transition and melting temperature of the dyed and pure PLA fiber. The results indicated that not only the structure of the dispersed dyes and the dyeing conditions affected the dyeing performance of PLA fiber, but also the degree of the crystallinity of PLA fiber contributed to the final dyeing results. Moreover, the transformation of such crystallinity during the disperse dyeing process should be taken into account when the dyeing temperature was studied.

show abstract

“…Natural dye from flowers has also been used to produce yellow PLA films [14]. The tensile strength of PLA declines with increasing dyeing time, probably reflecting the impact on fiber crystallinity [6,15].…”

Section: Introductionmentioning

confidence: 99%

Effect of Colorants and Process Parameters on the Properties of Dope-Dyed Polylactic Acid Multifilament Yarns

et al. 2022

View full text Add to dashboard Cite

The color of textile fibers is typically imparted by submersion in a high-temperature dye bath. However, the treatment of the effluent is challenging and the textile industry is therefore a major source of water pollution. Current fashion trends favor biobased polymers such as polylactic acid (PLA) but exhaust dyeing at high temperatures causes hydrolytic degradation, reducing the crystallinity and tenacity of the yarn. To preserve the mechanical properties of PLA-based textiles, an alternative to exhaust dyeing called dope dyeing can be used, wherein colorants are incorporated into the polymer matrix during melt spinning. We evaluated this process by dope dyeing PLA with several colorants, then testing the thermal, physical, and mechanical properties of the yarn and the physical properties of circular-knitted fabrics. Although the colorants affected the crystallization behavior at lower cooling rates, during the melt-spinning process, the drawing speed had a greater effect on the crystallinity and mechanical properties of the dyed yarn. Scanning electron microscopy revealed that the colorants were well dispersed in the PLA matrix. We found that the colorants did not affect the physical properties of the knitted fabric. Our results can be used to develop more environmentally beneficial dope-dyed PLA yarn with improved mechanical properties.

show abstract

Untitled

Cited by 11 publications

References 6 publications

Dyeing of PA 6.6 fibers

Dyeing of PA 6.6 fibers

DSC Studies on the Dyeing Properties of PLA Fiber

Effect of Colorants and Process Parameters on the Properties of Dope-Dyed Polylactic Acid Multifilament Yarns

Contact Info

Product

Resources

About