Jeans Production Research Articles

Towards Sustainable Jeans Production: Experimental Evaluation of a Denim Fabric to Abrasion Resistance by Dry Fabric-to-Fabric Rubbing

Towards Sustainable Jeans Production: Experimental Evaluation of a Denim Fabric to Abrasion Resistance by Dry Fabric-to-Fabric Rubbing

The carbon footprint of fast fashion consumption and mitigation strategies-a case study of jeans

Fast fashion is driving the continued growth of the fashion industry's carbon emissions. Understanding how fast fashion consumption exacerbates carbon emissions is critical to guide mitigation strategies for the fashion industry. Taking jeans, a typical fast fashion product as an example, this study developed an LCA model to assess the carbon footprint of fast fashion consumption at global and national levels, and mitigation potentials of product service systems-related scenarios were then explored. Results show that the carbon footprint of fast fashion consumption is 2.50 kgCO2e/one wear jeans, 11 times higher than that of traditional fashion consumption. Jeans production and cross-broad transportation contributed 91 % of the carbon footprint of fast fashion consumption. Developed countries have a 53 % higher per capita carbon footprint of fast fashion consumption than developing countries. The second-hand trading model has the highest mitigation potential, reducing carbon emissions by 90 %. This study proposed an analytical framework for the carbon footprint of fast fashion consumption, which provides the basis for the environmental footprints of fast fashion products. Our findings provide insights into the carbon footprints of traditional and fast fashion consumption and strategies for the transition to circular fashion.

Exploring the Common Failures and Routine Maintenance of Jeans Overlocking Machine

Purpose – This paper explores the common faults and daily maintenance methods of the overlock machine of the jeans production line. The overlock machine is one of the most widely used types of equipment in jeans manufacturing enterprises. It proposes targeted and operative solutions to enhance the regular operation of the overlock machine.Design/methodology/approach – Based on the application of overlock machines in jeans production lines, in-depth research and analysis of overlock machines in jeans production lines, use of case study method, continuous optimization of liberation methods for common faults of overlock machines, clarification of standard operating steps and daily maintenance methods for overlock machines.Findings – For common types of failures such as broken threads, broken needles, skipped stitches, wrong stitches, and sewing material problems in overlock machines, The author goes deep into the production line, tracks the operation of the jeans production line equipment, analyzes the causes of the failures, and propose solutions one by one.Research limitations/implications – Overlock machine troubleshooting does not apply to other sewing equipment, and proficiency requires specialized training.Practical implications – By sorting out faults and solutions, we can maintain a virtuous cycle of overlock machines on the production site and provide hardware for the smooth operation of the production line.Originality/value – The method proposed in this paper guides sewers and production line team leaders to enhance overlock machine maintenance and provides technical references for all types of jeans manufacturers to maintain and repair their overlock machines.

Perspectives of environmental management in Brazilian fashion: a study of practices in the production of jeans

This study aims to diagnose environmental management practices adopted by industries in the jeans production chain and present new and sustainable solutions to reduce environmental damage throughout the production processes. Through bibliographic research, documentaries, and semi-structured interviews, it was possible to diagnose several actions proposed by the present company to reduce environmental damage and contribute to achieving social justice. Thus, the research is significant, as the textile sector has excellent potential for achieving the SDGs in Brazil, especially when considering the growth of the world market of jeans, tied to various environmental and social impacts throughout the production process. Initiatives taken by other companies in the sector were identified, indicating new possibilities that can be adapted to the reality of several organizations to use them as a reference in mitigating environmental impacts. Regarding the company analyzed, it was observed that there is a stance on pollution control, considering the various initiatives that seek to mitigate social and environmental issues. However, it is suggested that the company has many mechanisms and paths to evolve toward pollution prevention postures or even a strategic approach, which will ensure a better performance in the implementation of new sustainable practices.

Jeans and their Fashionable Meanings: Revisiting Beverly Gordon's Cultural Conceptual Framework

Jeans and their Fashionable Meanings: Revisiting Beverly Gordon's Cultural Conceptual Framework

Dope Dyeing of Regenerated Cellulose Fibres with Leucoindigo as Base for Circularity of Denim.

Circularity of cellulose-based pre- and post-consumer wastes requires an integrated approach which has to consider the characteristics of the fibre polymer and the presence of dyes and additives from textile chemical processing as well. Fibre-to-fibre recycling is a condition to avoid downcycling of recycled material. For cellulose fibres regeneration via production of regenerated cellulose fibres is the most promising approach. Textile wastes contain dyes and additives, thus a recycling technique has to be robust enough to process such material. In an ideal case the reuse of colorants can be achieved as well. At present nearly 80% of the regenerated cellulose fibre production utilises the viscose process, therefore this technique was chosen to investigate the recycling of dyed material including the reuse of the colorant. In this work, for the first time, a compilation of all required process steps to a complete circular concept is presented and discussed as a model. Indigo-dyed viscose fibres were used as a model to study cellulose recycling via production of regenerated cellulose fibres to avoid downcycling. Indigo was found compatible to the alkalisation and xanthogenation steps in the viscose process and blue coloured cellulose regenerates were recovered from indigo-dyed cellulose. A supplemental addition of reduced indigo to the cellulose solution was also found feasible to adjust colour depth in the regenerated cellulose to the level required for use as warp material in denim production. By combination of fibre recycling and indigo dyeing the conventional yarn dyeing in denim production can be omitted. Model calculations for the savings in water and chemical consumption demonstrate the potential of the process. The proportion of the substitution will depend on the collection rate of denim wastes and on the efficiency of the fibre regeneration process. Estimates indicate that a substitution of more than 70% of the cotton fibres by regenerated cellulose fibres could be achieved when 80% of the pre- and post-consumer denim wastes are collected. Therefore, the introduction of fibre recycling via regenerated cellulose fibres will also make a substantial impact on the cotton consumption for jeans production.

Analysis on the Common Quality Problems and Production Methods of Jeans Belt Loop Knot

The belt loop is an important part of a standard five-pocket jeans, integrating functionality and aesthetics. Because of common problems such as skewed belt loop, unequal lengths, improper slackness, double lines at the front pocket of the belt loop cover, exposed bottom of the belt loop, asymmetry, too low or too high position of the belt loop, and no light in the back, we tracked the sewing of the belt loop in the jeans production line, analyzed the causes of the problems, and came out with targeted solutions. We analyzed the operation steps of knotting jeans belt loops and then develop daily maintenance measures for knotting machines, provide technical guidance for seamstresses/seamsters and team leaders to enhance the maintenance ability to knot machines, enhance the ability of knotting machines to run well, ensure the stability of jeans belt loops quality, and provide technical reference for quality control of belt loops in the same type of jeans production lines.

Evaluation of color removal efficiencies and kinetic parameters of Fenton (H2O2/Fe2+) and photo-Fenton (H2O2/Fe2+/UV) processes in the treatment of a textile wastewater containing indigo blue / Avaliação da eficiência de remoção de cor e parâmetros cinéticos dos processos de Fenton (H2O2/Fe2+) e foto-Fenton (H2O2/Fe2+/UV) no tratamento de um efluente têxtil contendo corante azul índigo

The textile industry uses Indigo blue dye extensively in the production of jeans. Thus, high volumes of wastewater containing dye are obtained and must be treated before being discharged. The color removal efficiencies of indigo blue dye synthetic wastewater after treatment by Advanced Oxidative Processes (AOPs) using Fenton (H2O2/Fe2+) and photo-Fenton (H2O2/Fe2+/UV) was evaluated in this work. The experiments were conducted at pH 2.8 and evaluated the influence of the amount of [H2O2]/[Fe2+], the use of sulfuric acid and citric acid to adjust the pH, the initial concentration of the indigo dye, and the dosage form of H2O2 - the kinetic parameters and BMG model were also evaluated. The use of sulfuric acid to adjust the pH was more efficient in removing the color. The highest color removal rates were 70.78 ± 2.96 % after 180 min and 64.22 ± 2.08 % after 60 min, respectively, for the Fenton and photo-Fenton processes (both with a single dose of reagents) and 79.76 ± 1.45 % after 300 min and 80.43 ± 1.27% after 180 min, respectively, for Fenton and photo-Fenton with the gradual addition of H2O2. The indigo dye degradation reactions are better suited to the BMG kinetic model.

The history of the creation of denim, brands and development of the production of jeans

The worldwide popularity of denim trousers has led to the appearance of many fakes, and it is only natural that the buyer wants to spend his money on an original + quality product. To do this, you need to have some knowledge. This article presents the history of the emergence of denim clothing and brands such as Levi's, Lee WRANGLER, and MONTANA. This article focuses on the development of denim fashion and the denim manufacturing process.

Chemical footprint of textile and apparel products: an assessment of human and ecological toxicities based on USEtox model

In the life cycle assessment framework, the comparison and assessment of chemical footprint (ChF) can be performed to identify the chemical categories with large toxic effect, including the initial inputs of chemical raw materials and the final emissions of chemical pollutants. In this study, the ChF methodology of textile and apparel products was demonstrated using the USEtox model with jeans production as a case study. Several chemical pollutants with large contribution to human and ecological toxicities were identified during the life cycle of the wet treatment process. The logarithmic plot and the cluster analysis indicate that dimethyl siloxane, reaction product with silica and 2-methyl-4-isothiazolin-3-one in the warp dyeing phase are two major contributors to human and ecological toxicities respectively. In the weft bleaching phase, magnesium chloride has high toxicity to humans, and sulfuric acid and nonylphenol ethoxylate have high toxicity to ecological environment. Therefore, these pollutants must be given much attention. The ChF results of chemical materials show that antifoaming agent in the warp dyeing phase has high toxicity to humans. In the weft bleaching phase, peroxide stabilizer has high toxicity to humans, and wetting/penetrating and sequestering agents have high toxicity to ecological environment. These findings can provide a practical guidance for the effective reduction in the toxic impact of textile industrial chemicals on humans and ecological environment.

Analisis Sistem Biaya Standar Dalam Meningkatkan Efisiensi Biaya Produksi Pada PT . HARDWARE

<p>The purpose of this study was to analyze the standard cost system in improving the<br />efficiency of production costs at PT. HARDWARE. Testing is done by comparing the<br />standard production costs with actual production costs. Then it can be seen whether the implementation of this production process takes place efficiently or inefficient. Based on the calculation of the analysis that compares the standard costs with actual costs or can actually be concluded that in the production of jeans, there is a difference that benefits and is not profitable on the cost of raw materials, because the calculation of production<br />costs in PT. HARDWARE hasn't been done properly</p>

FROM COTTON KIMONOS TO THE JEANS INDUSTRY THE DEVELOPMENT OF DENIM INDUSTRIAL CLUSTERS IN JAPAN

FROM COTTON KIMONOS TO THE JEANS INDUSTRY THE DEVELOPMENT OF DENIM INDUSTRIAL CLUSTERS IN JAPAN

ANALYTIC HIERARCHY PROCESS APPLIED TO INDUSTRIAL LOCATION: A BRAZILIAN PERSPECTIVE ON JEANS MANUFACTURING

<p>The textile sector is one of the most important among all industrial branches. It is important in world commerce because it is a highlight both in the economy of developed countries and in emergent countries. The purpose of this study is to help a Brazilian textile company, which specializes in jeans production, to study the conditions for installing a plant in three possible regions where the most important textile companies of the country are located. In the study, the Analytic Hierarchy Process (AHP), a multicriteria methodology for decision support, is used and results show a slight tendency toward the Rio de Janeiro state when compared to the Santa Catarina state, with both presenting a significant advantage over the Rio Grande do Norte state.</p>

UMA ABORDAGEM CTS NO ENSINO MÉDIO A PARTIR DO TEMA JEANS

This work aimed to elaborate a didactic approach based on the CTS focus for high school from the jeans theme. In the subject of Chemistry, there were developed activities for the discussion and exposition of the theme, experimentation, research and debate in the classroom about the scientific, technological and social aspects of the jeans, with the study of the concept of the oxireduction reaction. The purpose was developed in two groups of the 2 nd year of high school in a school from Santa Maria – RS. The results show the importance of discussing moot points as the ones that involve the jeans production, as there were highlighted some students’ difficulties related to the chemical concepts. The limitations found for the development of a CTS approach at school are mainly related to the curricular structure and the teachers’ formation, results that signal the need of proximity and insertion of such perspective in the school.

Use of Ceramic Membrane for Indigo Separation in Effluent from Textile Industry

The production of fabrics is one important sectors of the national economy, especially in jeans production. During dyeing step, in the production of jeans, it is generate a large amount of wastewater rich in indigo, a strong blue dye that when released directly into the environment is responsible for several environmental impacts. The aim of this work is to study the use of microfiltration ceramic membranes for indigo separation in effluents from textile industry. Initially the ceramic membranes were characterized in relation to the pore size and tangential flux. It was produced an indigo solution whose concentration and composition similar to the effluent of textile industry. The solution was characterized and submitted to a filtration through ceramic membranes by tangential flow, by applying a pressure of 3 Bar. At the end it was verified that 99% of the indigo was retained.

A water footprint assessment of a pair of jeans: the influence of agricultural policies on the sustainability of consumer products

Abstract This study reports the results of a water footprint (WF) assessment of five types of textiles commonly used for the production of jeans, including two different fibres (cotton and Lyocell fibre) and five corresponding production methods for spinning, dyeing and weaving. The results show that the fibre production is the stage with the highest water consumption, being cotton production particularly relevant. Therefore, the study pays particular attention to the water footprint of cotton production and analyses the effects of external factors influencing the water footprint of a product, in this case, the incentives provided by the EU Common Agricultural Policy (CAP), and the relevance of agricultural practices to the water footprint of a product is emphasised. An extensification of the crop production led to higher WF per unit, but a lower overall pressure on the basins' water resources. This study performs a sustainability assessment of the estimated cotton WFs with the water scarcity index, as proposed by Hoekstra et al. (2011) , and shows their variations in different years as a result of different water consumption by crops in the rest of the river basin. In our case, we applied the assessment to the Guadalquivir, Guadalete and Barbate river basins, three semi-arid rivers in South Spain. Because they are found to be relevant, the available water stored in dams and the outflow are also incorporated as reference points for the sustainability assessment. The study concludes that, in the case of Spanish cotton production, the situation of the basin and the policy impact are more relevant for the status of the basin's water resources than the actual WF of cotton production. Therefore, strategies aimed at reducing the impact of the water footprint of a product need to analyse both the WF along the value chain and within the local context.

Surface activation of dyed fabric for cellulase treatment

Surface activation of fabric made from cellulose fibres, such as viscose, lyocell, modal fibres and cotton, can be achieved by printing of a concentrated NaOH-containing paste. From the concentration of reducing sugars formed in solution, an increase in intensity of the cellulase hydrolysis by a factor of six to eight was observed, which was mainly concentrated at the activated parts of the fabric surface. This method of local activation is of particular interest for modification of materials that have been dyed with special processes to attain an uneven distribution of dyestuff within the yarn cross-section, e.g., indigo ring-dyed denim yarn for jeans production. Fabrics made from regenerated cellulose fibres were used as model substrate to express the effects of surface activation on indigo-dyed material. Wash-down experiments on indigo-dyed denim demonstrated significant colour removal from the activated surface at low overall weight loss of 4-5%. The method is of relevance for a more eco-friendly processing of jeans in the garment industry.

Making New Vintage Jeans in Japan: Relocating Authenticity

Japan has become renowned as a site for the production of artisanal-quality denim and jeans, which appeals to increasingly discerning cognoscenti. The usual mass-produced, non-designer “safe” denim has a ubiquitous presence in Japan as it does elsewhere but there are many Japanese for whom a pair of jeans has many more qualities that should be carefully considered before its consumption than the perhaps usual factors of price, brand, cut, wash and color. These include the types of machines the denim was woven on, the presence of certain (sometimes invisible) rivets, the technique of stitching and so on. “Made in Japan” has become the catchphrase for new denim authenticity sought by “denim maniacs” (denimu mania no hito). This paper gives a brief history of jeans in Japan, introduces the area where they are made and examines two jeans companies as well as consumers of these premium jeans. It looks at how expensive Japanese jeans echo the mingei craft movement in their emphasis on method of production over the aesthetics of the final product. It shows that authenticity in Japan can be relocated both geographically and from the “original” to the “copy.”

Magyar Denim: Metamorphoses in the Clothing Factory

In this article, based on contemporary press coverage analysis and my interviews with retired industry workers and leaders, I outline the initial phase of the production of denim jeans in Hungary in the late 1970s. This process involved a range of attempts to set conditions for mass manufacturing of denim jeans, which often collided with everyday realities in the non-market-driven economic circumstances prevailing in the Eastern Bloc. Whether it was the production of a heavy cotton twill of standard quality, or the dyeing that makes the worn jeans look as they should, or a marketing practice that could make Eastern-made jeans appealing to consumers—these goals often turned out to be difficult for Hungarian manufacturers. In my analysis of three companies’ attempts to produce jeans I outline some problems in establishing a production practice with technological and management standards set by Western-branded jeans—all well known by Hungarian customers—in the regulatory and technological environment of a socialist planned economy. These attempts to produce jeans—some of which were, in fact, quite successful—in retrospect served a variety of objectives for those involved, whether they were the technocratic reform agendas of socialist industry chiefs or a meaningful life for shop-floor workers.

A Multiple-Objective Environmental Rationalization and Optimization for Material Substitution in the Production of Stone-Washed Jeans- Garments

� Abstract—As the Textile Industry is the second largest industry in Egypt and as small and medium-sized enterprises (SMEs) make up a great portion of this industry therein it is essential to apply the concept of Cleaner Production for the purpose of reducing pollution. In order to achieve this goal, a case study concerned with eco- friendly stone-washing of jeans-garments was investigated. A raw material-substitution option was adopted whereby the toxic potassium permanganate and sodium sulfide were replaced by the environmentally compatible hydrogen peroxide and glucose respectively where the concentrations of both replaced chemicals together with the operating time were optimized. In addition, a process-rationalization option involving four additional processes was investigated. By means of criteria such as product quality, effluent analysis, mass and heat balance; and cost analysis with the aid of a statistical model, a process optimization treatment revealed that the superior process optima were 50%, 0.15% and 50min for H2O2 concentration, glucose concentration and time, respectively. With these values the superior process ought to reduce the annual cost by about EGP 10 5 relative to the currently used conventional method.