Project Database

Decolorization of Post-consumer PET by Non-Aqueous Solvent Medium (NASM)

Over 75 % of total fabrics are made of or involve PET. After recovery or separation, the PET fibers usually retain their original colors. As a matter of fact, mixtures of PET fibers of different colors may not be easily woven together to form new textiles and therefore, are commercially required to be decolored before being reused to make new textiles. The aim of this project is to develop a green approach for decolorization of post-consumer PET by Non Aqueous Solvent Medium (NASM), namely Supercritical Carbon Dioxide (ScCO2). The specific objectives of this project are: 1. Develop a laboratory scale NASM based decolorization system for post-consumer PET 2. Study the conditions of parameters (e.g. temperature, pressure, time, fabric weight per treatment) in the decoloring process 3. Estimate the operating cost of the decoloring process

Project No. (ITC) ITP/058/18TP
Project Type Seed
Project Co-ordinator Dr. CHAN Alex
Research Institute The Hong Kong Research Institute of Textiles & Apparel Limited
ITF Amount HK$ 2,799,000
Start Date DD/MM/YY 2018-11-30
Completion Date DD/MM/YY 2020-05-29