Thesis Details

Thesis Title: The effect of recycling 100% polyester yarns and fabrics on fiber characteristics
Thesis Author: Dyer Bennett
Abstract: The combined cost of raw material and land filling has forced the consideration of new ideas for dealing with waste generated in the mill. The trouble is dealing with the various types of waste that are generated. Typical textile wastes used for in-house recycling are considered soft-wastes, such as sliver, roving, card waste, and opening or cleaning line waste. Other wastes, such as yarn, knits, and wovens, are typically sold to waste dealers for use in shoddy, carpet underlay, or nonwoven materials. The machines used to produce the batting and wadding sold by waste converters are also capable of generating fiber for respinning into yarn for use in first quality applications, but little work has been documented on the parameters that affect the reclaimed fiber's qUality. The objective of this research was to process polyester wastes, such as knit, woven, and yarn, to determine what parameters of recycling affect their properties relative to spinning. The materials were subjected to two preparatory cutting methods where the materials were reduced into smaller pieces for the reclamation machine. The materials were then processed through a Laroche reclamation machine at varying through-put rates and from three to five cylinder passes. Samples were tested for cohesion, length change, short fiber content, strength, and elongation. Fiber from all three reclamations was chosen to represent the polyester fiber that would typically be available from a textile converter. These fibers were then blended at 5 % , 15%, and 25% with virgin polyester and processed into an 18 Ne open-end yarn. Properties of strength, elongation, Uster eveness, IPI defects, and hairiness were measured to determine the effect of reclaimed fibers affect on the yarn.