Modifiziertes Fibrillierverhalten von lösungsgesponnenen Cellulosefasern durch Umsetzungen mit Reaktivfarbstoffen

Nicolai, Monika; Nechwatal, Axel; Mieck, K.-P.

doi:10.1002/(sici)1522-9505(19980401)256:1<21::aid-apmc21>3.0.co;2-4

Cited by 11 publications

(15 citation statements)

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“…The graph shows Sandospace R to be clearly superior to the reactive dyes studied in this series and a similar situation was found for a series of dichlorotriazinyl dyes [11]. This is in keeping with the findings of many workers [8,11–18] who have observed that the coloration process with reactive dyes does not furnish a crosslinked fibre with sufficient protection against wet abrasion.…”

Section: Resultssupporting

confidence: 90%

“…The superiority of colourless crosslinking agents over multifunctional reactive dyes has not been rationalised. Previous workers [8,11–18] have found that, as expected, the crosslinking efficiency of reactive dyeing was affected by concentration of dye and application profile.…”

Section: Introductionsupporting

confidence: 68%

“…The variability of reactive dyes in the crosslinking process has been noted. Indeed, it has been shown [12] that the application of mono‐functional reactive dyes, themselves unable to crosslink the fibre, improve the NSF value. This can be ascribed to the dyeing process destroying the weaker fibres thereby increasing the average NSF value of the remainder.…”

Section: Resultsmentioning

confidence: 99%

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Protection of lyocell fibres against fibrillation; mechanism for the poor crosslinking performance of reactive dyes on lyocell fibres and the influence of a colourless crosslinking agent as co‐applicant

Ibbett

Owens

Reisel

et al. 2009

Coloration Technology

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Sandospace R and five multi‐functional reactive dyes have been applied to lyocell fibre, by exhaust methods. A comparison has been made of the number of mmoles of each species covalently bonded to the fibre, with cross‐linking efficiency (NSF values). None of the dyes studied was able to achieve levels of cross‐linking found in non‐fibrillating grades of lyocell, unless unrealistically high levels were applied. Sandospace R readily matched the NSF values found in commercially produced non‐fibrillating fibres. An explanatory mechanism based on differences in size between Sandospace R and the reactive dyes has been proposed. Fitting the experimental NSF data to an Arrhenius model confirmed the increasing gradient of the NSF curves with increasing millimolar concentration of species fixed. The chroma of the agent‐plus‐dye fibre samples remained relatively constant being either at the same level or above that of those fibre samples treated only with dye. Co‐application of Sandospace R with the reactive dyes has achieved levels of cross‐linking found in commercial non‐fibrillating lyocell fibres.

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Section: Resultssupporting

confidence: 90%

Section: Introductionsupporting

confidence: 68%

Section: Resultsmentioning

confidence: 99%

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Protection of lyocell fibres against fibrillation; mechanism for the poor crosslinking performance of reactive dyes on lyocell fibres and the influence of a colourless crosslinking agent as co‐applicant

Ibbett

Owens

Reisel

et al. 2009

Coloration Technology

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“…By means of the wet abrasion test, it was found that there is a relation between the structure characteristics of the dyestuff and its ability to form crosslinking bridges. In addition, the wet abrasion number is influenced by the concentrations of the reactive dyestuff and by dyeing conditions (Nicolai et al 1998). In this investigation, wet abrasion values NSF and fibrillation number F N are used as indicators for the crosslinking effect of reactive dye in lyocell fabrics, where high NSF values and low F N determine the low fibrillation tendency of fibres.…”

Section: Effect Of Dyeing and Decolouration Lyocell Fabricsmentioning

confidence: 99%

CI Reactive Black 5 dye as a visible crosslinker to improve physical properties of lyocell fabrics

Bui

Ehrhardt²,

Bechtold³

2008

Cellulose

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Bi-functional reactive dyes have been used for reducing the fibrillation of lyocell fibres. The sole influence of CI Reactive Black 5 dye on the fibrillation tendency of lyocell single jersey knitted fabrics was investigated by dyeing with different concentrations (35 g/L for medium shade and 70 g/L for dark shade), dyeing without dyestuff and by decolouration process after each dyeing. The fibrillation tendency of lyocell fibres was accessed by means of fibre wet abrasion resistance and fibrillation number. Nitrogen content was used as indication of the amount of reactive dye in fabrics during dyeing and decolouration processes. The correlation between fibre fibrillation tendency and colour values of fabrics was found. Due to the fibrillation reduction, pilling formation in dyed lyocell fabrics was improved. As colour values can estimate the dye fixation and reduction in fabrics, reactive dye can be used as a visible marker for crosslinking effect on lyocell fabrics.

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“…Tencel LF and Tencel A 100. Certain bifunctional cellulose reactive dyes also offer some protection against wet abrasion [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Cross‐linking agents for the protection of lyocell against fibrillation: stability of benzeneacrylamido compounds to high temperature acidic environments

Renfrew

Phillips

et al. 2005

Coloration Technology

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A number of benzeneacrylamido compounds, each with at least one sulphonic acid or carboxylic acid group, have been synthesised and converted to the corresponding methyl ethers. The derivatives were then subjected to high temperature polyester dyeing conditions (130 °C) in pH 4.0 buffer solution for 1 h. Derivatives with sulphonic acid groups meta or para to the amide links proved to be hydrolytically stable to the high temperature treatment, whereas derivatives with either an ortho sulphonic acid or carboxylic acid substituent underwent significant amide hydrolysis. This is consistent with previous findings and with a neighbouring group participation mechanism. Accordingly, benzeneacrylamido cross‐linking agents for lyocell fibres, designed to be hydrolytically stable to a range of high temperature polyester dyeing conditions appropriate for polyester/lyocell blends, should be devoid of ortho sulphonic acid or carboxylic acid substituents.

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Modifiziertes Fibrillierverhalten von lösungsgesponnenen Cellulosefasern durch Umsetzungen mit Reaktivfarbstoffen

Cited by 11 publications

References 0 publications

Protection of lyocell fibres against fibrillation; mechanism for the poor crosslinking performance of reactive dyes on lyocell fibres and the influence of a colourless crosslinking agent as co‐applicant

Protection of lyocell fibres against fibrillation; mechanism for the poor crosslinking performance of reactive dyes on lyocell fibres and the influence of a colourless crosslinking agent as co‐applicant

CI Reactive Black 5 dye as a visible crosslinker to improve physical properties of lyocell fabrics

Cross‐linking agents for the protection of lyocell against fibrillation: stability of benzeneacrylamido compounds to high temperature acidic environments

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