Pigment particle interactions with viscose polymeric media during manufacturing of dope dyed viscose fibers / Esha Sharma in CHEMICAL FIBERS INTERNATIONAL, Vol. 70, N° 2/3 (09/2020)  

[article]  inCHEMICAL FIBERS INTERNATIONAL > Vol. 70, N° 2/3 (09/2020) . - p. 95-97 Titre : Pigment particle interactions with viscose polymeric media during manufacturing of dope dyed viscose fibers Type de document : texte imprimé Auteurs : Esha Sharma, Auteur ; Neelesh Shukla, Auteur ; Gurudatt Krishnamurthy, Auteur ; Sunil Bhagwat, Auteur ; Ravindra V. Adivarekar, Auteur Année de publication : 2020 Article en page(s) : p. 95-97 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie textile Dispersions et suspensions Filature au mouillé Procédé dans lequel une solution de substance fibrogène est extrudée dans un milieu liquide de coagulation où le polymère est régénéré, comme dans la fabrication de la viscose ou de la rayonne cuproammoniacale. Pigments Stabilisants (chimie) Teinture -- Fibres textiles synthétiques Teinture dans la masse Viscose Index. décimale : 677.4 Textiles artificiels Résumé : Wet treatment post-fiber processing such as dyeing, finishing and function-alization of fabrics results in the generation of a large amount of effluents of dyes and chemicals, creating an adverse impact on the environment and human health. Imparting the coloration and functionalization during the process of making the fiber itself is an effective solution practiced in the synthetic and regenerated cellulosicfiber industry to reduce this impact, e.g. dope dyeing, adding cationic dyeability etc. The challenges involved in the case of fiber level modifications in regenerated cellulose process like viscose are different from those encountered in synthetic fiber processes. Though commercial products based on fiber modifications are available, a gap exists in the understanding of additives — media interactions in the viscose process. This study has been initiated to bridge the gap and enable better processability and product quality in products made through fiber modification. In this specific article the focus is on pigment-slurry/dope interactions, during the process of making dope dyed viscose fibers. Note de contenu : - INTERACTIONS DURING DIFFERENT PROCESS STEPS : Particle - particle - media interaction at slurry stage - Particle - particle - media interaction at dope stage - EFFECT OF KEY PARAMETERS ON AGGLOMERATION OF PIGMENT PARTICLES - REDUCING AGGLOMERATION OFPIGMENT PARTICLES : Optimization of stabilizer chemistry in pigment slurry and viscose dope - Fig. 1 : Schematic of environmental sustainability of Birla Spunshades - Fig. 2 : Stages of dispersion - Fig. 3 : Microscopic images of pigment particles in different pH solutions in slurry and dope - Fig. 4 : Effect of concentrations of 3 stabilizers on particle size in slurry at pH 14 - Fig. 5 : Effect of 2 stabilizers and their concentrations on filterability of dope - Fig. 6 : Back pressure increase with time lot during dope dyed fiber spinning - Table : Few key fiber properties of fibers made at pilot scale with different stabilizers En ligne : https://drive.google.com/file/d/1MzWHblN-I7RIpvXSIeDrtcwUW3TItYXE/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34560 [article]

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