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Home Science News Technology and Engineering

How do manufacturing choices affect microfibre shed?

April 5, 2024
in Technology and Engineering
Reading Time: 3 mins read
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Comparison of yarn hairiness
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New peer-reviewed research in Frontiers of Environmental Science sheds light on how manufacturing choices influence microfibre release in textiles.  

Comparison of yarn hairiness

Credit: Source: ‘Investigating the influence of yarn characteristics on microfibre release from knitted fabrics during laundering’. Can be used without credit.

New peer-reviewed research in Frontiers of Environmental Science sheds light on how manufacturing choices influence microfibre release in textiles.  

Using a washing simulator (gyrowash), the researchers from the University of Leeds tested various densities of yarns in unknitted hanks and knitted forms, and compared how much microfibre they released when washed. 

Alice Hazlehurst, doctoral researcher in the School of Design at the University of Leeds, who led the research, said: “Our findings show that the entire process of textile production, down to the way yarn is spun, is important in the effort to limit microfibre release.  

“Manufacturers should contain these details in specifications of yarn spinning, as well as the fibre type, to help clothing designers make more informed choices.” 

Their key findings were:

  • Unknitted polyester released more microfibre than unknitted cotton, but similar amounts were released when polyester was knitted. This suggests that polyester suffered less damage than cotton during the knitting process. 
  • Microfibre release in tightly knitted fabrics during laundering was reduced, but manufacturers should consider fibre fly – the visible ‘fluff’ that comes off fabrics as they are knitted in factories – which is higher when garments are tightly knitted. 
  • Vortex-spun yarns (where fibres are twisted using jets of air in a vortex) had a lower microfibre release than ring-spun yarns (where fibres are twisted in a metal ring). Ring-spun yarns tend to be more ‘hairy’ than vortex-spun yarns, which has been shown to increase microfibre release in washing. 

The research concluded that changes to the fibre composition and the yarn spinning system would have the greatest influence in terms of reducing microfibre release.

However, these details are not currently included in product specifications, which makes it more difficult for brands to make informed choices about which garments will release more or less microfibre.

More research needed

The academics are also calling for more research into the effects of microfibre release on the environment and human health so measures can be targeted towards reducing harm. 

Dr Mark Taylor, Research Fellow at Leeds’ School of Design, said: “We know cotton produces more microfibre than polyester and people assume that cellulose (from cotton) is less worrying than microplastic because it’s natural. But the truth is that we don’t have enough information about the impacts of these fibres on humans, aside from knowing they can take hundreds of years to biodegrade and can have a negative impact on marine life.” 

Dr Mark Sumner, Lecturer in Sustainable Fashion at the School of Design, said: “Our previous research found that UK washing is a huge source of pollution, releasing an estimated 1,500 double decker buses worth of microfibre every year, so it’s important that information about fabric knitting and yarn spinning systems are included in specifications.”



Journal

Frontiers in Environmental Science

DOI

10.3389/fenvs.2024.1340229

Method of Research

Experimental study

Subject of Research

Not applicable

Article Title

Investigating the influence of yarn characteristics on microfibre release from knitted fabrics during laundering

Article Publication Date

20-Mar-2024

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