Abstract
Waste recycling is a necessary step for environmental conservation. To this end, polyester can be easily collected and recycled into end products. To promote the use of recycled polyester, it is important to expand its range of applications. We earlier reported the fabrication of recycled polyester thermal-bonded nonwovens. In this study, recycled nonwoven fabrics were dyed with Terminalia chebula dye without the use of additional mordants. To optimize the dyeing conditions, the dyeing time, dyeing temperature, and liquor concentration were varied, and the color strength, color changes, fastness properties, thermal stability, and morphology were evaluated. Further, the antibacterial activity of the dyed nonwoven was also estimated. T. chebula dyed the colored recycled rapid melting PET fiber (R-RM) nonwoven brown via the dyeing process, and the dyeablity was improved by increasing the dyeing temperature, time, and liquor concentration. The rubbing and sweat fastness properties were found to be excellent. T. chebula dye imparted efficient antibacterial properties to the R-RM nonwovens against Staphylococcus aureus and Klebsiella pneumonia. The results obtained in this study are expected to broaden the range of natural dyed recycled polyester fabric applications.
Highlights
There is a growing interest in environmental issues around the world, and significant research on eco-friendly materials is being conducted
We have reported the properties and applications of recycled polyester fiber [3,4,5]
Based on many previous studies [20,21,22], it is reported that the light color fastness for fabrics dyed with natural dyes without any mordant shows a poor grade; this study showed a slightly higher light color fastness without the use of mordants
Summary
There is a growing interest in environmental issues around the world, and significant research on eco-friendly materials is being conducted. Thpolyester plastics, including polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), have been widely used in textile fibers, nonwovens, films, engineering fields, and packaging materials. Polyester can be collected and recycled into end products, unlike other conventional polymer materials [1,2]. Our group recently conducted a study on the fabrication of thermal-bonded nonwoven fabrics made from chemically recycled bi-component polyester fibers [6]. The bi-component polyester fibers were prepared by co-extruding two different polyester grades in a sheath-core construction; the polyester grades comprise a high melting temperature regular polyester core and a low melting temperature polyethylene terephthalate-polybutadiene terephthalate (PET-PBT) copolymer
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