American Journal of Materials Engineering and Technology
ISSN (Print): 2333-8903 ISSN (Online): 2333-8911 Website: Editor-in-chief: Serge Samper
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American Journal of Materials Engineering and Technology. 2014, 2(1), 1-6
DOI: 10.12691/materials-2-1-1
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Comparative Evaluation of the Effects of Time of Heat Setting and Wet Processing on Shearing Properties of Knitted Ingeo™ Poly (Lactic Acid) (PLA) and Polyethyleneterepthalate Fabric

Idumah C. I.1, , Nwachukwu A. N.2 and Akubue B. N.3

1School of Materials, University of Manchester, Manchester, United Kingdom, M13 9PL

2Williamson Research Centre for Molecular Environmental Sciences, School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Manchester, UK M13 9PL

3Ebonyi State University Nigeria

Pub. Date: March 24, 2014

Cite this paper:
Idumah C. I., Nwachukwu A. N. and Akubue B. N.. Comparative Evaluation of the Effects of Time of Heat Setting and Wet Processing on Shearing Properties of Knitted Ingeo™ Poly (Lactic Acid) (PLA) and Polyethyleneterepthalate Fabric. American Journal of Materials Engineering and Technology. 2014; 2(1):1-6. doi: 10.12691/materials-2-1-1


This paper comparatively studied the effects of time of heatsetting and wet processes on shearing rigidity (G1 .G2 ) gf/cm. degree, shear hysteresis at 5%, shear angle (2HG1, 2HG2) and shear angle at 5% (2HG51 and 2HG52) of knitted Ingeo™ Poly (lactic) acid and Polyethyleneterepthalate fabrics in warp [G1] and weft [G2] directions using the KES-FS system of fabric evaluation. PLA samples of dimension 200 mm x 200 mm were subjected to heatsetting at temperatures of 130°C respectively and increasing times of 15 s, 30 s, 45 s, 60 s, 90 s, 120 s and 240 s using the Werner Mathis infra-red heatsetting equipment and subsequently treated to wet processes including scouring, alkaline reduction clearing, dyeing and softening. The KES Shear tester was used in determining the ease with which knitted PLA and PET fibers slided against each other to ascertain properties such as softness, pliability to stiffness/rigidity and inter yarn stability to mechanical distortion. They samples were measured to a maximum shear angle of ± 8°. Results showed that after subjecting the samples to various wet processes, PET exhibited higher shear rigidity G in both warp (G1) and weft (G2) directions with increasing times of heatsetting. Measurements of shear hysteresis at 0.5° shear angle (2HG) and 5° angle (2HG5) in gf/cm showed PLA exhibiting a higher shear hysteresis than PET with increasing times of heatsetting.

Ingeo™ Poly (lactic acid) KES-FB system shearing rigidity (gf/cm) shearing hysteresis (gf/cm)

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