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Journal ArticleDOI

Development of Circularly Recyclable Low Melting Temperature Bicomponent Fibers toward a Sustainable Nonwoven Application

TL;DR: Sustainable low melting temperature bicomponent polyester fibers that can be circularly recycled were developed in this article, where potentially biobased poly(hexamethylene terephthalate) (PHT) acting as the low...
Abstract: Sustainable low melting temperature bicomponent polyester fibers that can be circularly recycled were developed. The potentially biobased poly(hexamethylene terephthalate) (PHT), acting as the low ...
Citations
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Journal ArticleDOI
TL;DR: In this paper , the authors proposed nonwoven materials differing in density and thickness, obtained from textile waste, following an airlaying industrial process, and investigated the acoustic and thermal performances of the developed materials.

1 citations

Journal ArticleDOI
TL;DR: A series of nonionic hyperbranched polymers (HBPs) with an isatin-based backbone and phenolic terminal units were synthesized and characterized by SEC, NMR, FTIR, TGA and DSC analyses as mentioned in this paper .
Abstract: This work aimed to develop biocompatible non-leachable antimicrobial polymers without ionic structures. A series of nonionic hyperbranched polymers (HBPs) with an isatin-based backbone and phenolic terminal units were synthesized and characterized. The molecular structures and thermal properties of the obtained HBPs were characterized by SEC, NMR, FTIR, TGA and DSC analyses. Disk diffusion assay revealed significant antibacterial activity of the obtained phenolic HBPs against nine different pathogenic bacteria. The presence of a methoxy or long alkyl group close to the phenolic unit enhanced the antibacterial effect against certain Gram positive and negative bacteria. The obtained nonionic HBPs were blended in polyester poly(hexamethylene terephthalate) films, which showed no noticeable leakage after being immersed in water for 5 days. Finally, these HBPs showed no cytotoxicity effect to MG-63 osteoblast-like human cells according to MTT analysis, and negligible hemolytic effect.
Journal ArticleDOI
01 Feb 2023-Polymers
TL;DR: In this article , a quantitative method based on cross-sectional in-situ observation and image processing was developed for the identification and quantitative analysis of bicomponent fibers, fiber-based flexible devices, and blended textiles.
Abstract: To accelerate the industrialization of bicomponent fibers, fiber-based flexible devices, and other technical fibers and to protect the property rights of inventors, it is necessary to develop fast, economical, and easy-to-test methods to provide some guidance for formulating relevant testing standards. A quantitative method based on cross-sectional in-situ observation and image processing was developed in this study. First, the cross-sections of the fibers were rapidly prepared by the non-embedding method. Then, transmission and reflection metallographic microscopes were used for in-situ observation and to capture the cross-section images of fibers. This in-situ observation allows for the rapid identification of the type and spatial distribution structure of the bicomponent fiber. Finally, the mass percentage content of each component was calculated rapidly by AI software according to its density, cross-section area, and total test samples of each component. By comparing the ultra-depth of field microscope, differential scanning calorimetry (DSC), and chemical dissolution method, the quantitative analysis was fast, accurate, economical, simple to operate, energy-saving, and environmentally friendly. This method will be widely used in the intelligent qualitative identification and quantitative analysis of bicomponent fibers, fiber-based flexible devices, and blended textiles.
Journal ArticleDOI
TL;DR: In this paper , the current state of non-woven personal protection equipment (PPE) fabrics by exploring the material constituents and processing steps to produce fibers and bond them, and how each fabric layer is integrated into a textile and how the assembled textiles are used as PPE.
Abstract: While nonwoven fabrics have existed for several decades, their usage in personal protective equipment (PPE) has been met with a rapid surge of demands, in part due to the recent COVID-19 pandemic. This review aims to critically examine the current state of nonwoven PPE fabrics by exploring (i) the material constituents and processing steps to produce fibers and bond them, and (ii) how each fabric layer is integrated into a textile, and how the assembled textiles are used as PPE. Firstly, filament fibers are manufactured via dry, wet, and polymer-laid fiber spinning methods. Then the fibers are bonded via chemical, thermal, and mechanical means. Emergent nonwoven processes such as electrospinning and centrifugal spinning to produce unique ultrafine nanofibers are discussed. Nonwoven PPE applications are categorized as filters, medical usage, and protective garments. The role of each nonwoven layer, its role, and textile integration are discussed. Finally, the challenges stemming from the single-use nature of nonwoven PPEs are discussed, especially in the context of growing concerns over sustainability. Then, emerging solutions to address sustainability issues with material and processing innovations are explored.
References
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Patent
William K. Witsiepe1
22 Jun 1970
TL;DR: In this article, the authors discuss the effect of the length of a long chain on the performance of a short chain elastomer and show that at least 80% of the short chains are 1,4-butanedIOLs.
Abstract: SEGMENTED THERMOPLASTIC COPOLYESTER ELASTOMERS CONTAINING RECURRING POLYMERIC LONG CHAIN ESTER UNITS DERIVED FROM DICARBOXYLIC ACIDS AND LONG CHAIN GLYCOLS AND SHORE CHAIN ESTER UNITS DERIVED FROM DICARBOXYLIC ACIDS AND LOW MOLECULAR WEIGHT DIOLS. AT LEAST 80% OF THE DICARBOXYLIC ACID USED IS TEREPHTHALIC ACID AND AT LEAST 80% OF THE LOW MOLECULAR WEIGHT DIOL IS 1,4-BUTANEDIOL. THE SHORT CHAIN ESTER UNITS CONSTITUTE ABOUT 48-65% BY WEIGHT OF THE POLYMER. SUCH COPOLYESTERS RAPIDLY HARDEN FROM THE MOLTEN STATE AND HAVE OUTSTANDING PHYSICAL PORPERTIES, ESPECIALLY TEAR STRENGTH, EABRASION RESISTANCE AND FLEX LIFE.

283 citations

Journal ArticleDOI
TL;DR: The significance of circular fashion and textile is highlighted and various approaches for reuse, recycle and repurposing of the textiles waste as well as disruptive scientific breakthroughs, innovations and strategies towards a circular textile economy have been discussed.

201 citations

Journal ArticleDOI
01 Nov 2004-Polymer
TL;DR: In this article, the self-assembly and crystallization behavior of a well-defined low molecular weight polyethylene-block-poly(ethylene oxide) (PE-b-PEO) diblock copolymer was studied.

127 citations

Journal ArticleDOI
TL;DR: The authors conducted an online survey of 410 people in Ontario, Canada with varying demographic characteristics to assess how they currently manage their textile waste including resell, swap, take-back, donation and disposal.
Abstract: Past studies have considered the impact of fashion on consumer textile disposal behaviour, but have focused mainly on drivers of clothing waste. There is a lack of research that examines consumer attitudes towards fashion and their disposal methods. This study conducted an online survey of 410 people in Ontario, Canada with varying demographic characteristics to assess how they currently manage their textile waste including resell, swap, take-back, donation and disposal. Respondents were asked about their fashion interest and shopping frequency and were assigned a fashion index value. The fashion index value is not a means of grouping consumers but is instead a continuum to model interest in fashion, with one extreme representing fashion consumers and the other representing non-fashion consumers. Statistical analysis was then used to establish whether there is a link between textile waste behaviour and fashion index. The results indicate that consumers with a high fashion index (i.e. fashion consumers) and consumers with low fashion index (i.e. non-fashion consumers) manage their textile waste differently. While the majority of participants donate and dispose of unwanted clothes, fashion consumers are more interested and more likely to participate in alternative methods (e.g. resell, swap, and take back) for removing unwanted textiles. Although fashion consumers produce more textile waste than non-fashion consumers, textile consumption cannot be directly equated with textile waste since fashion consumers were found to have a lower disposal rate than non-fashion consumers (38 percent to 50 percent, respectively). The distinct disposal characteristics of fashion and non-fashion consumers (i.e. interest and willingness to participate in alternative channels) allows strategies to be tailored accordingly so that the amount of waste going to landfill can be reduced.

98 citations

Journal ArticleDOI
TL;DR: In this article, a review of polymers, additives, and processes used in melt spinning is presented, and fundamental questions regarding fiber morphologies, structure-property relationships, as well as flow and draw instabilities are addressed.
Abstract: Textiles have a very long history, but they are far from becoming outdated. They gain new importance in technical applications, and man-made fibers are at the center of this ongoing innovation. The development of high-tech textiles relies on enhancements of fiber raw materials and processing techniques. Today, melt spinning of polymers is the most commonly used method for manufacturing commercial fibers, due to the simplicity of the production line, high spinning velocities, low production cost and environmental friendliness. Topics covered in this review are established and novel polymers, additives and processes used in melt spinning. In addition, fundamental questions regarding fiber morphologies, structure-property relationships, as well as flow and draw instabilities are addressed. Multicomponent melt-spinning, where several functionalities can be combined in one fiber, is also discussed. Finally, textile applications and melt-spun fiber specialties are presented, which emphasize how ongoing research efforts keep the high value of fibers and textiles alive.

85 citations