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Synthetic cellulose fibers that do not require chemical solvents

Time : 2019-12-20 Hits : 19

Spinnova, a fiber technology company based in Finland, has developed a way to convert wood pulp directly into textile fibers without using a chemical solvent.


At present, common viscose fiber, wood dale fiber and ressel fiber belong to regenerated cellulose fiber, that is, the cellulose in pulp such as wood pulp, cotton pulp is extracted and then spun into cellulose fiber. Regenerated cellulose fibers are in the process of manufacturing need to use organic solvent, solvent and basically have a certain toxicity, although a lot of fiber company through closed-loop process or other ways to increase the recovery of the solvent to nearly 100%, greatly improved the security of the production process, however, if there is a kind of spinning technology can not directly without organic solvent is safer?

Spinnova has developed a patented technology for spinning wood pulp into fibers without chemical processing. With this technology, Spinnova hopes to further reduce the potential environmental burden of the process of producing regenerated cellulose fibers.


The idea for such a fibre was first conceived in 2009, when the Technical Research Centre of Finland (VTT) discovered the similarities between nanocellulose and spider web proteins and came up with the idea of spinning lignocellulose into a fibre using a similar spinning process.


The company USES microfiber-cellulose, a paste made from fsc-certified sustainable wood that contains many very small fibers. After the fine fiber pulp flows to the nozzle, the fibers rotate and are arranged in parallel along the flow direction to form a fiber network with certain strength and elasticity. After spinning and drying, the fibers become fluffy and strong wool-like materials. The resulting staple fibers can be used for dyeing or spinning to make textiles. The only by-product of the whole process is the evaporated water, which is recycled back into the production process for further use.


At the moment, most recycled clothes are shredded and made into insulation rather than recycled into clothing, mainly because the fibres are short and hard to spin again. Spinnova, a microfiber spinning process, may provide a new use for recycling old clothes by recollecting the fibers from recycled clothing and spinning them into fabric.

In addition to wood pulp, Spinnova can also use cellulosic materials derived from wheat stalks. The technology was developed by Spinnova in collaboration with Fortum. In the production process, the straw was first separated in stages by Chempolis Oy, an associate company of Fortum, using sustainable processing technology. Then, Spinnova's technology was used to mechanically convert microfiber-cellulose into fiber. The fabric, which can be used to make knitted t-shirts, jackets and skirts, was on display at the Textile Exchange Sustainability Conference in vancouver on October 15, 2017.


In the future, Fortum and Spinnova plan to build sustainable fiber production lines at Fortum's future biorefinery to make full use of the biorefinery to process agricultural waste. Compared with other processing technologies, the refinery fractionation technology can realize the efficient utilization of wheat straw resources and greatly reduce the resource efficient utilization of wheat straw, so as to reduce the adverse impact on the environment caused by the discarding or burning of wheat straw in the field.

(source: official account of textile herald)

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