Texturing, stretching and relaxation behaviour of polylactide multifilament yarns

• Published in: Textile research journal Vol. 81; no. 17; pp. 1788 - 1795
• Main Authors: Manich, Albert M, Miguel, Rui, Lucas, Jose, Franco, Francisco, Baena, Barbara, Carilla, Josep, Montero, Lucila, Cayuela, Diana
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01-10-2011; Sage Publications Ltd
• Subjects: Polyesters; Polylactides; Strain hardening; Stress relaxation; Stresses; Stretching; Studies; Textiles; Texturing; Yarn; Yarns; generalized Maxwell model; polylactide multifilaments; False-twist texturing; stress relaxation
• ISSN: 0040-5175; 1746-7748
• DOI: 10.1177/0040517511411972

Polylactide multifilament yarns were textured in order to be endowed with properties of natural staple fibre yarns for textile applications. Texturing promotes the formation of stable secondary links between the macromolecular chains. A polylactide 167/68 dtex multifilament yarn was textured under different conditions. Relaxation experiments at yield, strain softening, strain hardening and just before breaking were performed. The relaxation behaviour was studied by the application of the generalized Maxwell model. The initial stress induced when stretched, the final non-relaxed stress after relaxation and the stress relaxed at different times were determined. Variations in the relaxation behaviour were related to texturing conditions and stretching.