Patent Alert 2025-09

Polyester is the most widely used synthetic textile fibre, with polyethylene terephthalate (PET) being one of its most common forms. PET is extensively employed in textile manufacturing, either as a pure material or blended with natural fibres like cotton. Due to its widespread application, implementing effective end-of-life strategies for PET and polyester textiles is crucial to reducing textile waste. Among these strategies, recycling plays a central role and is the focus of this month’s patent alert. The selected patents primarily explore innovations in chemical recycling processes, while others present methods involving chemical treatments to remove impurities—such as dyes—prior to the mechanical recycling of recovered PET fibres.

Patents on PET Textile Recycling

1. Catalysts for polyethylene terephthalate degradation
2. A method to recycle a stream of polyester waste material and a system for applying the method
3. Method for regeneration of polyester and recycling of polyester textile waste using a thermal treatment
4. Process for recovery of a polyethylene terephthalate-based polymer from a polymeric material
5. Systems for decoloring and recycling pure fibers
6. Method for room temperature depolymerization of terephthalic polyesters to terephthalate esters
7. A method of recycling at least a portion of a textile material comprising polyester fibers, and a system intended therefore
8. A method and system for recycling at least a portion of a textile material comprising polyester fibers