CircleStretch – Cost efficient approach for manufacturing and recycling of biobased PTT fiber in textile industry

Bio-based Polytrimethylene terephthalate (PTT), which is included in Sorona® och Lyckra T400®, is an ideal fiber material for the textile industry in terms of technical performance and sustainability. However, the high cost of PTT fibers and recycling issues greatly hinders the application of them in the textile industry.

In this project, Volvo Cars, IKEA, Borgstena, FOV, IKEM, the network of 130+ garment manufacturers Kemikaliegruppen and the research actors RISE IVF and Lund University have joined forces to strengthen the move towards a biobased economy including cost-efficient PTT material in the textile industry. Residual biobased feedstocks will be used as the raw material to produce the building blocks for the synthesis of cost-efficient biobased PTT. In addition, a sustainable way of recycling of PTT waste will be also developed in order to establish the circularity of biobased PTT in the textile industry.


RISE, Lunds Universitet, Volvo Cars, Borgstena, FOV, IKEM, Kemikaliegruppen vid RISE and one more company.

Budget & time plan

The project’s budget is 4 217 000 MSEK and runs between June 2020 and December 2022.