Green textile dyeing process by using natural dyes: a review

In the textile industry, up to 200,000 tons of dyes are lost to effluents every year during the dyeing and finishing operations, due to the inefficiency of the dyeing process. Today, the textile industry used average six hundred dyes and chemical for the in production of textile dyeing industry (Christy, 2014). Due to the toxicity of dyes and chemicals used in textile dyeing processes has led to both human health and environment directly or indirectly. Therefore, “Go-green” or going green is one alternative way to maintain the sustainability and productivity of textile dyeing industry hence maintaining natural ecological balance in the environment and preserving its natural system and resources. The textile dyeing industry makes a big contribution to the economic growth and has become a massive industry throughout the years. This is because higher demand in the production of synthetic dyes since they are affordable, good colour fastness, has various of colours available and are easy to manufacture. However, the environmental impact arising from these industries aroused attention in today’s society. In terms of pollution, the textile dyeing industries has been condemned as one of the world’s most offensive industry among other sectors in the world. In fact, World Bank stated that textile processing polluted 20% of water pollution globally

Kinetics of dyeing in continuous circulation with direct dyes: tencel case

Due to the special characteristics of Tencel fibres, it is important to gather new data and information in order to improve our knowledge of their performance during dyeing. Kinetic equations are used to describe the behaviour of the heterogeneous dye-fibre system under isothermal conditions in order to determine the evolution of dye exhaustion versus dyeing time. Direct dyes are particularly suitable because they are physically absorbed and because they exhibit outstanding substantivity to cellulose. In addition, some of these dyes have a linear structure which ensures good correlation with structural differences in the fibres. The aim of this study is to quantify the kinetic behaviour of the Tencel-C.I. Direct Blue 1 system (one of the most common dyes in dyeing studies) by using three bi-parametric empirical dyeing-rate equations and a continuous-flow dyeing cell to obtain experimental data at six different temperatures: 30, 40, 50, 60, 70 and 80ºC. In order to check the level of adjustment of the equations we record the at three exhaustion levels: 50%, 80%, and final exhaustionPostprint (published version

Development auxiliaries for dyeing polyester with disperse dyes at low temperatures

High-molecular weight organic compounds known as carriers are widely used to expedite polyester dyeing at atmospheric pressure at 100 °C. However, carriers are usually poorly biodegradable and can partially plasticize fibres. Also, dyeing at temperatures above 100 °C in the absence of a carrier entails using expensive equipment. In this work, we developed an alternative method for dyeing polyester at temperatures below 100 °C that reduces energy expenses, dispenses with the need to invest in new equipment and avoids the undesirable effects of non-biodegradable carriers. The method uses disperse dyes in a microemulsion containing a low proportion of a non-toxic organic solvent and either of two alternative development auxiliaries (coumarin and o-vanillin) that is prepared with the aid of ultrasoundPostprint (published version

Asian knowledge and the development of calico printing in Europe in the seventeenth and eighteenth centuries

From the seventeenth century, the brilliance and permanence of colour and the exotic nature of imported Asian textiles attracted European consumers. The limited knowledge of colouring agents and the general absence of textile printing and dyeing in Europe were, however, major impediments to the development of a cotton textile-printing and -dyeing industry in Europe. This article aims to chart the rise of a European calico-printing industry in the late seventeenth and eighteenth centuries by analysing the knowledge transfer of textile-printing techniques from Asia to Europe

The Utilization of Waste Shallot Skin (Allium Cepa L) as Natural Dyeing Material for Textile Product

Previous studies on the onion skin as a natural dye by Made Diah Angendari showing the colour of each mordant used a Jumputan and suggested using a different concentration of mordant in the next research. Based on it, interviews were conducted to three different speakers: KLP Nusantara, Mrs Kuswati, and Dapur Alifa. According to the interviewers, all can produce ±64 kg of onion skin per month and most of the onion skin were thrown or burned. Based on it, a research was done by using a variation of colouring matter, mordant measurement, dyeing technique, dyeing duration, and technique of textile to use plenty onion skin and develop technique on the natural dye of onion skin. To obtain the required data, the student collects the data with experimental methods, such as by observation, interview, literature study, and experimentation. The results of the elected experiment show that the used of iron post-mordanting and an hour cold dyeing technique have a good result based on the endurance of wear-off in Balai Besar Tekstil Bandung and it was applied to a textile product in the form of long cloth with different measurement. Keywords Shallot skin, natural dye, textile product

A review on the present situation of wastewater treatment in textile industry with membrane bioreactor and moving bed biofilm reactor

Membrane bioreactor (MBR) is one of the advanced treatment technologies used in industrial wastewater treatment due to its various advantages over conventional biological processes. Recently, the application of MBR in treatment of textile wastewater has increased significantly with an effective removal of contaminants. Moving bed bioreactor (MBBR) has been efficiently used for the treatment of different municipal and industrial wastewater during the last decades and it is a relatively novel and effective technology applied in textile wastewater treatment. This review paper presents the situation of MBR and MBBR technology for textile wastewater purification under different conditions and collates results of previous studies during the past years about MBR and MBBR treatment technologies used in textile processes. Both of these two technologies have shown their efficiency, but they still have problems in textile wastewater treatment. To this end, MBR-MBBR hybrid system could be an attractive solution for textile wastewater purification because of the high efficiency and low consumption of energy and spacePostprint (author's final draft

Tracking Report 2010 Hanesbrands, Italy 7200361029

This document is part of a digital collection provided by the Martin P. Catherwood Library, ILR School, Cornell University, pertaining to the effects of globalization on the workplace worldwide. Special emphasis is placed on labor rights, working conditions, labor market changes, and union organizing.FLA_2010_Hanes_TR_Italy_7200361029I.pdf: 9 downloads, before Oct. 1, 2020

Women at work in Mali: the case of the Markala Cooperative

African Studies Center Working Paper No. 5

A Neighborhood Search for Sequence-dependent Setup Time in Flow Shop Fabrics Making of Textile Industry

Abstract This paper proposes a neighborhood search to solve scheduling for fabrics making in a textile industry. The production process consists of three production stages from spinning, weaving, and dyeing. All stages have one processor. Setup time between two consecutive jobs with different color is considered. This paper also proposes attribute’s decomposition of a single job to classify available jobs to be processed and to consider setup time between two consecutive jobs. Neighborhood search (NS) algorithm is proposed in which the permutation of set of jobs with same attribute and the permutation among set of jobs is conducted. Solution obtained from neighborhood search, which might be trapped in local solution, then is compared with other known optimal methods