A new process of combined pretreatment and dyeing: REST

Öner, Erhan; Şahinbaşkan, Burcu Yılmaz

doi:10.1016/j.jclepro.2011.05.008

Cited by 60 publications

(20 citation statements)

References 13 publications

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“…Kokol and Golob [14] performed biopreparation of raw cotton using enzymes and also carried out reactive dyeing in the same bath. Oner and Sahinbaskan [15] carried out all of the stages viz., desizing, scouring, bleaching and dyeing in a single bath without replacing the process water until the end of the dyeing. They named the process 'Rapid Enzymatic Single-bath Treatment' (REST), since it was completed almost in half of the conventional dyeing time.…”

Section: Introductionmentioning

confidence: 99%

A facile energy and water-conserving process for cotton dyeing

Harane

Mehra

Tayade

et al. 2014

Int J Energy Environ Eng

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Nowadays, all research efforts in the field of wet processing of textiles are directed towards shortening and simplification of the processing sequence. To minimise water and energy consumption, it has become necessary to combine several textile processing stages to reduce the number of operations or shorten the process time. An attempt was made to combine the pre-treatment and dyeing processes with optimal quantities of textile auxiliaries in single bath. In this process, individual stages of pre-treatment like desizing, scouring and bleaching followed by dyeing using direct dyes were carried out in a single bath without the usual intermediate washings. This process was carried out without replacing the liquor bath until the end of dyeing. An attempt was also made to dye a woven fabric at different stages, viz., grey, desizing and scouring. These efforts were made to conserve water and energy required for that particular pre-treatment process. The depth of dyeing and the colour fastness properties of all these dyed fabrics were then compared with a bleached fabric which was dyed with conventional method. The properties were at par with the conventional method. Moreover, the combined process saved 83.1 % water, 88.6 % energy (thermal) and 79.3 % time than the conventional processes. Thus, the process has been shown to be ecological, economical and energy conserving.

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Section: Introductionmentioning

confidence: 99%

A facile energy and water-conserving process for cotton dyeing

Harane

Mehra

Tayade

et al. 2014

Int J Energy Environ Eng

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“…Após o processo de fiação, todas as etapas desde a engomagem, preparação, tinturaria e/ou estamparia e finalmente o acabamento, consomem grandes volumes de água gerando elevados volumes de efluentes; e para tanto necessitam em média de 70 a 250 litros de água para cada quilograma de substrato tratado [2,4]. Esse consumo depende da natureza do substrato têxtil, do tipo de máquina e da relação de banho utilizada, dos tipos de processos e tempos utilizados na preparação e lavação dos tingimentos.…”

Section: Introductionunclassified

Pre-alvejamento de materiais têxteis com ozônio e avaliação de suas propriedades de superfície, físicas e tintoriais

2017

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A inovação dos processos de beneficiamento de materiais têxteis é cada vez mais importante para possibilitar a redução no consumo de água e nos tempos de processo na indústria têxtil. O consumo de fibras têxteis no Brasil em 2014 foi de 13,3 kg por habitante, e para beneficiar estes tecidos são utilizados em média 80 litros de água para cada quilograma de substrato tratado. Este estudo visou aprimorar o processo de pré-alvejamento para tecidos têxteis utilizando o ozônio com o objetivo de reduzir o consumo de água, de aditivos químicos, de tempo e bem como de energia. O potencial de redução do ozônio (2,07 V) é maior que o potencial de redução do peróxido de hidrogênio (1,77 V), o que faz com que o ozônio seja um excelente agente oxidante. A avaliação dos resultados de resistência física (estouro e tração), propriedades tintoriais (K/S, FC % e DE) e do grau de branco do tecido, indicam que o processo de pré-alvejamento com ozônio a frio é promissor na indústria têxtil, pois além de eliminar a utilização de peróxido de hidrogênio e hidróxido de sódio, reduz o tempo de processo em 60% e diminui o consumo de água em 50%.Palavras-chave: Materiais têxteis. Algodão. Poliéster. Pré-alvejamento. Ozônio. ABSTRACTThe innovation of the processes of the textile materials is becoming more and more important to reduce the amount of water and the use of machinery time in the textile industry. The consumption of textile fibers in Brazil in 2014 was 13,3 kilograms per capita and to produce these fabrics with 80 liters of water on average are used to each kilo of treated substract. This study aims to improve the pre-bleaching process for textile fabrics using the ozone with the objective to reduce the consumption of water, chemical products, time as well as energy. The potential for reducing ozone (2.07 V) is greater than the reduction potential of hydrogen peroxide (1.77 V), which makes the ozone is an excellent oxidising agent. The evaluation of results in resistance (strength and traction), dyeing properties (K/S, FC % and DE) and the whiteness degree of prebleached fabrics using cold ozone indicates that this is a promising process for the textile industry, since it not only eliminates the use of hydrogen peroxide and sodium hydroxide but also allows eliminating the process in at least 60% also reducing water consumption in 50%.

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“…Moreover, desizing, scouring, and bleaching processes in the same bath were found to be feasible. Opwis et al (2013) used a-amylase, pectinase, and hemicellulase enzymes in the same bath for desizing and scouring. Results showed that it was possible to renounce alkaline scouring by enzymatic ones.…”

Section: Introductionmentioning

confidence: 99%

Combined one-bath desizing–scouring–depilling enzymatic process and effect of some process parameters

Toprak

Aniş

2016

Cellulose

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Enzymatic treatments in textile are remarkable because of their environmentally friendly properties, such as less energy, water and chemical need, low waste water pollution. In this paper combined use of amylase, pectinase and cellulase in the same bath was studied in different parts. In the first part of the experiment, raw cotton woven fabrics were treated with amylase, pectinase and cellulase enzymes in the same bath at different process conditions to desize, scour and polish. Results showed that one-bath triple enzymatic mixture process could be done successfully. Therefore, it could be used instead of conventional processes. Moreover, the enzymatic process was completed almost in half of the conventional treatments' durations and temperatures. In the second part, effects of enzymes' dosages were analyzed by using enzymes in pairwise combinations. By this way, not only the effects of the amount of enzymes but also the effects of each enzyme on each fabric property were seen more distinctly. The increases of enzymes' concentrations led to an increase in every tested value except tear strength. Pectinase ? cellulase combination resulted in minimum tear strength and whiteness, but maximum absorbency. Usage of enzymes one-by-one constituted the final part of the study. It had been found that amylase affected whiteness and absorbency, cellulase affected tear strength particularly. Although combined enzymatic treatments were conducted at more moderate conditions than conventional processes, comparable results were observed.

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A new process of combined pretreatment and dyeing: REST

Cited by 60 publications

References 13 publications

A facile energy and water-conserving process for cotton dyeing

A facile energy and water-conserving process for cotton dyeing

Pre-alvejamento de materiais têxteis com ozônio e avaliação de suas propriedades de superfície, físicas e tintoriais

Combined one-bath desizing–scouring–depilling enzymatic process and effect of some process parameters

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