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About this book

This book examines the environmental footprints of recycled polyesters, highlighting the benefits and impact of recycling polyester waste and preparing it to replace virgin polyester in the raw material stage. It also discusses the importance of recycled polyester as a sustainable raw material in textile production.

Table of Contents


LCA (Life Cycle Assessment) on Recycled Polyester

Polyester is a synthetic material which is produced from the petroleum products. The various environmental impacts are associated with polyester from manufacturing to end of life. Therefore, the manufacturing of recycled polyester (rPET) is an important to process as concerned with environmental impact and also inevitable. The rPET has a wide scope of their potential applications similar to virgin polyester. Generally, life cycle assessment (LCA) technique investigates the environmental impacts of the particular products from its cradle to grave. Therefore, it helps to identify the critical phase which creates the maximum impact on the entire product life cycle. So, it is significant to understand the environmental impact of rPET, nevertheless, LCA on rPET is foreseeable. The data from the LCA can initiate preliminary steps to reduce the environmental burdens from the products, also it provides the detailed information on how it affects the ecosystem. In this chapter we discussed about the LCA on rPET, initially, the brief introduction will be provided about the present manufacturing techniques of rPET. Various issues associated with sustainability of rPET manufacturing, importance and methodology of LCA on rPET were explained in detail. Based on the LCA results, the important parameters with respect to the sustainability of rPET would be present in this chapter.
Aravin Prince Periyasamy, Jiri Militky

Advancements in Recycled Polyesters

Plastics must be arranged for reusing, which includes exertion and cost. Research is centered on discovering substances that can encourage the blending of various sorts of plastics, known as compatibilizers, enabling them to be reused together. The greater part of plastics right now reused are made out of polyethylene terephthalate (PET), which is the segment utilized in most water bottles, and polyethylene, the most exceedingly created plastic. Chemical reusing strategies with lower vitality necessities, compatibilization of blended plastic wastes to stay away from the requirement for arranging, and growing reusing advancements to generally non-recyclable polymers. “New materials enter the market gradually, and consequently the greatest effect is in growing increasingly proficient techniques to reuse the plastics that are created in huge amounts today”. The innovation of precisely arranging plastic waste has experienced a mechanical “upset”, where old plastic is separated and used to make new items at a positive cost/advantage balance. Synthetic reusing is advancing quick with innovative developments for effective recouping vitality, creation of important new concoction items, for example, monomers or petrochemical feedstocks. Mechanical advances have been accomplished on the depolymerization of plastic waste to turn one sort of plastic into another that is progressively important. Warm and reactant breaking pyrolysis into fluid energizes is progressing with promising results. Inventive bioplastics which are completely recyclable and ecologically inviting are under extreme research in numerous modern and college research centers. Biorenewable parts for thermosets, supplanting hydrocarbon-based polymers with those produced using vegetable oils or other plant-based materials. That could prompt new end-of-life alternatives, for example, treating the soil or synthetic reusing for these materials.
A. Saravanan, P. Senthil Kumar

Recycled Polyester—Tool for Savings in the Use of Virgin Raw Material

The demand for Polyester is rising especially in the Asia Pacific region as predicted by the textile forecast. The superior quality, established manufacturing and lower economics has made it a practical alternative for other fibers. The possibility of recycling has created a growing awareness for the use of RPET for the manufacture of sustainable clothing. Further polyester fibers can be made functional by incorporating special properties of hi-tech nature opening new opportunities in the global market. Sportswear and home textiles are two major segments that capitalize in the use of polyester fibers. The sustainability drive looks for the environmental footprints by using tools like life cycle assessment of products and materials. The human demand on nature for the growth and development of a region/product or process is inevitable; the capacity of nature to regenerate will be spoken in terms of environmental footprint. Virgin polyester has a greater environmental footprint when compared to RPET as reiterated by various case studies and reports. This paper will highlight the environmental foot print of RPET and virgin polyester with suitable examples to understand the basis for the use of recycled polyester. A case study has been analyzed to show the benefits of using Recycled hollow polyester for functional pillows. Leading retailers in the apparel sector communicate to the consumers the percentage of RPET in their apparel through labels and advertisements to promote sustainability awareness ending in product sales. The future is recycling and reuse and RPET will play an important role in reaching the targets and aspirations of the textile world.
Shanthi Radhakrishnan, Preethi Vetrivel, Aishwarya Vinodkumar, Hareni Palanisamy

Case Studies on Recycled Polyesters and Different Applications

The developing textile sector confronts difficulties to recycle and reuse their material wastes into applicable industrial products. Recycling is the most suitable way to deal with diminishing the solid waste. Polyester is the world’s common recyclable polymer. Recycled polyester utilizes PET as the crude material. The enthusiasm for polyethylene terephthalate (PET) recycling gained attention in recent years; however it has been practised consistently in the past years. Recycled polyesters are used in food contact bottles, sheeting, films, fibres, etc. Polyester, an engineered fibre produced using oil, a non-renewable asset, is generally known for its eco-friendly impacts at the time of its production processes. Utilizations of recycled polyester fibres in the manufacturing of clothing are getting sociable nowadays. Drink bottles delivered from reused PET are on the ascent. Recycled polyester generated from the post-consumer waste, for example, PET bottles are observed to be ecologically advantageous contrasted with origin polyester. The techniques used for recycling can be classified as primary, secondary, tertiary or quaternary methodologies. The two currently used techniques are mechanical and chemical recycling of polyester. Recycling of polyester is advancing to fulfil the necessities of the requirements. Various utilizations are being processed from recycled polyester. Acceptance by consumer remains a major benchmark for sustainable recycling polyester. The strategy utilized in this examination is from contextual analyses. The contextual analyses assessed application, recycling, process procedures and overall polyester recycling. The discoveries feature powerful headway and perspective to be connected in the proposed recycling process. The point of this investigation is to survey the present polyester recycling system so as to advance and assemble a manageable polyester recycling framework.
P. Senthil Kumar, P. R. Yaashikaa
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