Post-consumer cotton waste as an alternative raw material for the Lyocell spinning process

Saal A
Donnerstag, 14.09.2023, 09:50 - 10:15 Uhr

The presentation shows how SaXcell technology is able to convert post consumer cotton waste in to high quality and high value Lyocell type of fibres. The presentation will also focus on the role of chemical recycling of post consumer cotton waste related

Antonio Martinez et al (SaXcell BV, Enschede (NDL))

SaXcell BV ( is a spin-off company of Saxion University of Applied Science and located in Goor (pilot plant) and Enschede (quality control and R&D laboratory) in the Netherlands. SaXcell, an abbreviation of Saxion cellulose, is a regenerated virgin textile fibre (Lyocell type) made from chemically recycled postconsumer cotton waste. Mechanical recycling of post consumer cotton waste has some serious drawbacks, mainly related to high amounts of short fibres leading to low quality fibres. Chemical recycling on the other hand is more complex and expensive than mechanical recycling, but is able to transfer low quality short cotton fibres into high quality manmade cellulose fibres. So, chemical recycling should exist next to mechanical recycling to enable an efficient recycling process of cotton waste.The SaXcell technology transfers post consumer waste into a high quality cellulose pulp designed as a drop-in pulp for the Lyocell wet spinning process. The production of such a high quality pulp is not possible without a thorough understanding of the wet spinning process and the properties of cotton waste. The window of operation for pulp properties in the Lyocell process appears to be quite narrow, e.g. related to the required degree of polymerisation of the cellulose and the polyester content. Typical properties of the SaXcell pulp will be presented as well as some fibre properties after wet spinning. The presentation will conclude with a view on the future developments at SaXcell BV.