MUMBAI, India, Sept. 28 -- Intellectual Property India has published a patent application (202647114128 A) filed by Cellucircle Ab on September 23, 2026, for A Method For The Separation Of Cotton And Pet Blended Textiles From Textile Waste Material By A Combination Of Water-Based Chemical And Mechanical Treatments, And Products And Uses Related Thereto.
Inventors include Mathew, Aji Pallikunnel; Apostolopoulou Kalkavoura, Varvara; and Pisimisi, Effrosyni.
The application for the patent was published on September 25, 2026, under issue no. 39/2026.
Abstract: The disclosure relates to a method for the separation of cotton and polyethylene terephthalate (PET) blended textiles from textile waste material by a combination of water- based chemical and mechanical treatments, comprising the following steps: (a) providing the textile waste material comprising (i) at least one thermoplastic polymer material, comprising PET in composition of 10-90%, preferably about 50%, and (ii) cotton consisting of almost 100% cellulose in composition of 10-90%, preferably about 50%; (b) exposing the textile waste material for TEMPO mediated oxidation, in order to assist the fibrillation of cotton into nanocellulose while keeping PET essentially intact, thereby obtaining a TEMPO oxidized polycotton mixture; (c) mechanically treating the TEMPO oxidized polycotton mixture, such as by stirring and/or grinding, in order to separate fibres and/or to reduce the size of cellulose fibres in the mixture; (d) separating nanocellulose from the mixture of step (c), such as by filtration, thereby obtaining at least a PET rich fraction and a nanocellulose rich fraction. The disclosure further relates to a nanocellulose dispersion produced by the method, a nanocellulose material obtained by the method, a nanocomposite, a recycled textile product produced by the method, a production facility for performing the method and a product.
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