Effect of woven fabrics on the fabric hand of cotton and CO/PES fabrics assessed on the Instron tensile tester

Shear behavior is one of the most important mechanical characteristics that contributes to the performance and appearance of woven fabrics. Because of anisotropy, shear properties of woven fabric are tested in various directions. This research is focused on the experimental study of shear properties of plain woven fabric when shear force acts on specimens that are cut at different angles to the direction of the weft. Tests were conducted on woven fabric specimens that were fastened in two parallel clamps of the tensile tester. Five cotton woven fabrics of different weft density and of the same warp density were used. The research results show a very high degree of correlation between shear force and its axial component for all directions of the cutting specimen, and likewise between the relative extension of the diagonal of the specimen and the vertical displacement of the specimen. The initial shear modulus of woven fabrics was determined experimentally and theoretically.

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Improving Mechanical Textile Recycling by Lubricant Pre-Treatment to Mitigate Length Loss of Fibers

Sustainability ◽

10.3390/su12208706 ◽

2020 ◽

Vol 12 (20) ◽

pp. 8706

Author(s):

Katarina Lindström ◽

Therese Sjöblom ◽

Anders Persson ◽

Nawar Kadi

Keyword(s):

Fiber Length ◽

Woven Fabrics ◽

Test Method ◽

Rotor Spinning ◽

Tensile Tester ◽

Peg 4000 ◽

Textile Recycling ◽

Pre Treatment ◽

Recycled Fibers ◽

Length Reduction

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.

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