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Lindström, KatarinaORCID iD iconorcid.org/0000-0001-5744-9800
Publications (6 of 6) Show all publications
Lindström, K., van der Holst, F., Berglin, L., Persson, A. & Kadi, N. (2023). Investigation Of Abrasive Pre-Treatment To Mitigate Length Loss During Mechanical Textile Recycling. In: : . Paper presented at AUTEX 2023 Conference, Melbourne, Australia, 26-28 June, 2023..
Open this publication in new window or tab >>Investigation Of Abrasive Pre-Treatment To Mitigate Length Loss During Mechanical Textile Recycling
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2023 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

The environmental burden of the textile industry can be decreased with an increased use of mechanically recycled fibers. However, it is well known that the recycling process is harsh and shortens the fibers substantially. Still, little has been investigated about the influencing factors of the fiber length loss. 

Previous research has shown that the parts of a garment that is more worn, lose less fiber length in the mechanical recycling process.1 One explanation could be that a loss of fibers during wearing create a more open structure of the textile. By removing fibers from the yarns in a textile, the yarn structure is partly broken down, and the yarn linear density is decreased. The strength of spun staple fiber yarns is dependent on the friction and contact surfaces between fibers. In addition, fiber migration, the variation of radial position of a fiber in the yarn, causes the fibers to lock between different helical layers and thus creates a self-locking mechanism giving strength to the yarn.2 Removal of any fiber in such a yarn affect all fibers in contact with that fiber. This in turn makes both the textile and yarns weaker and consequently more easily disentangles in a mechanical recycling process – keeping more of the fiber length. 

The work at hand investigated this theory by subjecting woven cotton textiles with abrasion treatment prior to mechanical recycling. We compared two different methods of abrasion with unabraded textile. The two pre-treatment abrasion methods used were rubbing with sandpaper and raising with steel pins. By measuring the fiber length post mechanical recycling, we could estimate the efficiency of the recycling process in respect to preservation of the fiber. 

Results showed that only the raising process had a positive impact in mitigating fiber length loss through the recycling process. During the rubbing with sandpaper, the fabric was pressed and thus became denser. On the contrary, the raising process pulled out the fibers and created a fuzzy surface. As the removal of any fiber affect all fibers in direct contact, even fibers in the center of the yarn are affected when surface fibers are pulled out or weakened. The raising process extracted fibers which opened up the fabric and affected the yarn structure. Hence, the yarns were more easily disentangled in the recycling process. The result gives great insight into the mechanisms of mechanical recycling and can be used for future development of the same. 

Keywords
Mechanical textile recycling, abrasion pre-treatment, fiber length loss, recycling efficiency
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-30392 (URN)
Conference
AUTEX 2023 Conference, Melbourne, Australia, 26-28 June, 2023.
Available from: 2023-08-31 Created: 2023-08-31 Last updated: 2023-08-31Bibliographically approved
Lindström, K., Sjöblom, T., Persson, A. & Kadi, N. (2020). Improving Mechanical Textile Recycling by Lubricant Pre-Treatment to Mitigate Length Loss of Fibers. Sustainability, 12(20)
Open this publication in new window or tab >>Improving Mechanical Textile Recycling by Lubricant Pre-Treatment to Mitigate Length Loss of Fibers
2020 (English)In: Sustainability, E-ISSN 2071-1050, Vol. 12, no 20Article in journal (Refereed) Published
Abstract [en]

Although there has been some research on how to use short fibers from mechanically recycled textiles, little is known about how to preserve the length of recycled fibers, and thus maintain their properties. The aim of this study is to investigate whether a pre-treatment with lubricant could mitigate fiber length reduction from tearing. This could facilitate the spinning of a 100% recycled yarn. Additionally, this study set out to develop a new test method to assess the effect of lubricant loading. Inter-fiber cohesion was measured in a tensile tester on carded fiber webs. We used polyethylene glycol (PEG) 4000 aqueous solution as a lubricant to treat fibers and woven fabrics of cotton, polyester (PES), and cotton/polyester. Measurements of fiber length and percentage of unopened material showed the harshness and efficiency of the tearing process. Treatment with PEG 4000 decreased inter-fiber cohesion, reduced fiber length loss, and facilitated a more efficient tearing process, especially for PES. The study showed that treating fabric with PEG enabled rotor spinning of 100% recycled fibers. The inter-fiber cohesion test method suggested appropriate lubricant loadings, which were shown to mitigate tearing harshness and facilitate fabric disintegration in recycling.

Place, publisher, year, edition, pages
Basel: MDPI, 2020
Keywords
textile recycling, yarn spinning, inter-fiber cohesion, lubricant, mechanical tearing
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-24384 (URN)10.3390/su12208706 (DOI)000583088400001 ()2-s2.0-85093925329 (Scopus ID)
Funder
Region Västra Götaland
Available from: 2020-12-09 Created: 2020-12-09 Last updated: 2022-02-10Bibliographically approved
Lindström, K., Sjöblom, T., Persson, A. & Kadi, N. (2019). Decreasing Inter-Fiber Friction With Lubricants For Efficient Mechanical Recycling Of Textiles. In: Autex 19th World Textile Conference: Textiles at the Crossroads. Paper presented at Autex 2019 World Textile Conference, Ghent, June 11-15, 2019..
Open this publication in new window or tab >>Decreasing Inter-Fiber Friction With Lubricants For Efficient Mechanical Recycling Of Textiles
2019 (English)In: Autex 19th World Textile Conference: Textiles at the Crossroads, 2019Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

To decrease the environmental burden of the textile industry and at the same time reduce textile waste, the fibers of discarded textiles can be re-used into new yarns and fabrics. The shortening of fibers during mechanical shredding direct the use of the recovered fibers to low value products. With the use of a lubricant pre-treatment on cotton and polyester fabrics, we decreased the friction during shredding. The reduction in friction was shown with a developed inter-fiber friction test. Further, the pre-treatment was shown to give longer recovered fibers and eliminate melted areas in polyester material.

National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-21205 (URN)
Conference
Autex 2019 World Textile Conference, Ghent, June 11-15, 2019.
Available from: 2019-06-17 Created: 2019-06-17 Last updated: 2019-06-20Bibliographically approved
Lindström, K., Kadi, N. & Persson, A. (2019). Investigation Of Staple Fibre To Fibre Cohesion By Tensile Test Of Web. In: : . Paper presented at Aachen-Dresden-Denkendorf International Textile Conference, Dresden, November 28-29, 2019..
Open this publication in new window or tab >>Investigation Of Staple Fibre To Fibre Cohesion By Tensile Test Of Web
2019 (English)Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

Friction and cohesion forces have great influence on the processability of a fibre as well as causing fibre breakage during mechanical recycling of textiles. Through pre-treatment of the fibres or textiles with a lubricant, the friction and cohesion forces can be decreased. However, the measurement of friction coefficient on staple fibres is challenging and needs special machinery. With the development of a new test method of the fibre cohesion force we can measure the effect of a treatment on fibre cohesion, predict the spinnability of a fibre as well as see the effect of a lubricant on the tearing efficiency in textile mechanical recycling.

Series
Skrifter från Centrum för lärande och undervisning, ISSN 1650-5859Skrifter från Centrum för lärande och undervisning, ISSN 1650-5859
Keywords
Textile recycling, yarn spinning, inter-fiber cohesion, lubricant, mechanical shredding, Textilåtervinning, garnspinning, smörjmedel, mekanisk textilåtervinning
National Category
Textile, Rubber and Polymeric Materials
Identifiers
urn:nbn:se:hb:diva-22823 (URN)
Conference
Aachen-Dresden-Denkendorf International Textile Conference, Dresden, November 28-29, 2019.
Funder
Region Västra Götaland
Available from: 2020-02-17 Created: 2020-02-17 Last updated: 2020-02-26Bibliographically approved
Lindström, K. (2018). Pretreatment of textile for a more gentle shredding process. In: : . Paper presented at RISE IVF Test bed for textile recycling : Seminar, September 12, 2018.
Open this publication in new window or tab >>Pretreatment of textile for a more gentle shredding process
2018 (English)Conference paper, Oral presentation only (Other (popular science, discussion, etc.))
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-15741 (URN)
Conference
RISE IVF Test bed for textile recycling : Seminar, September 12, 2018
Available from: 2019-02-11 Created: 2019-02-11 Last updated: 2019-02-13Bibliographically approved
Lindström, K., Kadi, N. & Persson, A. (2018). Utility of conditioner for reduced interfibre friction as predictor of gentler shredding. In: Aachen-Dresden-Denkendorf International Textile Conference, Aachen, November 29-30 2018: . Paper presented at Aachen-Dresden-Denkendorf International Textile Conference, Aachen, November 29-30, 2018.
Open this publication in new window or tab >>Utility of conditioner for reduced interfibre friction as predictor of gentler shredding
2018 (English)In: Aachen-Dresden-Denkendorf International Textile Conference, Aachen, November 29-30 2018, 2018Conference paper, Poster (with or without abstract) (Other academic)
Keywords
Textile recycling, yarn spinning, inter-fiber friction, lubricant, mechanical shredding, Textilåtervinning, garnspinning, fiberfriktion, smörjmedel, mekanisk textilåtervinning
National Category
Textile, Rubber and Polymeric Materials
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-15740 (URN)
Conference
Aachen-Dresden-Denkendorf International Textile Conference, Aachen, November 29-30, 2018
Available from: 2019-02-11 Created: 2019-02-11 Last updated: 2019-02-13Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0001-5744-9800

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