recycling wool for growing business...recycling wool for growing business - project the project was...
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Recycling Wool for GrowingBusiness
Anneli Auranen
Aalto University Master Student in Textile Design
Metropolia University of AppliedSciences, Bachelor of Fashion and Clothing
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Recycling Wool for GrowingBusiness - project
The project was coordinated by Metropolia University of Applied Sciences but several companies involved in the wool/textile industry participated in the project.
The projects objectives were to
• Create connections with different wool actors and connect the supply chain for wool recycling in Finland.
• Study fiber properties and chemical residues in recycled wool.
• Research the suitability of recycled wool for a variety of products.
• See what kind of business potential there is in wool recycling.
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The mechanical recycling process of wool
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Collecting and sorting
• The collecting of old wool textiles was made by Reuse Centre in Helsinki.
• The sorting was made according to color and fiber content.
• The labels in textiles are sometimes missing and they can also be unreliable.
• Part of sorting the textiles is removing buttons and zippers.
• Some material used in the project came from wool textile manufacturers in the form of process waste.
• This waste is excellent material for recycling because it doesn’t need as much sorting and the content of the material is already known.
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Shredding the textiles
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Opening and mixing the fibers + carding
• The next phase is opening and mixing the fibers.
• Carding straightens the fibers and removes trash and tangles
• Carding produces batts (large, thick sheets of wool), thin sheets or a long strip.
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Spinning
• The spinning of recycled wool fibers is the same process as with new wool
• The thinner the yarn, the harder it is to produce from recycled fibers
• It is not possible to make worsted yarn from recycled wool because of its inconsistent quality
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Findings on fiber length
• The fiber length of virgin wool is between 25-75mm
• The fiber length of recycled fibers varied between 25-53mm.
• The fiber composition of 80 % recycled wool /20 % virgin wool had the average fiber length of 47mm
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Chemicals in post consumer wool
• The amount of formaldehyde was examined.
• The limit of formaldehyde in textiles for children under two years old is 30mg / kg and for adults 100mg / kg.
• The samples examined contained 4-22mg/kg formaldehyde
• Some testing was done to see the concentration of the most common heavy metals such as copper, zinc, nickel and cadmium
• Further testing on chemicals is recommended if making products from post consumer wool.
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Final products
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Conclusions
• Recycled wool performed well in all production stages.
• The current problem is that there isn’t yet organized collection and sorting for wool waste.
• There is however a project called Telaketju in Finland that organizes textile collecting and sorting by 2023.
• The amounts wool waste in Finland are relatively small so cooperation with other countries could be beneficial for larger scale business.