Types of polyolefin fibres

Crangle, A. A.

doi:10.1533/9781845695552.1.3

Cited by 4 publications

(1 citation statement)

References 21 publications

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“…For textile applications, woven polyethylene fabrics are often used as geotextiles, tarpaulins, and tapes. 48 To assess the suitability of polyethylene for clothing applications, further studies are needed to evaluate mechanical comfort and durability.…”

Section: Design and Simulation Of An Itvofmentioning

confidence: 99%

Infrared-Transparent Visible-Opaque Fabrics for Wearable Personal Thermal Management

et al. 2015

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Personal cooling technologies locally control the temperature of an individual rather than a large space, thus providing personal thermal comfort while supplementing cooling loads in thermally regulated environments. This can lead to significant energy and cost savings. In this study, a new approach to personal cooling was developed using an infrared-transparent visible-opaque fabric (ITVOF), which provides passive cooling via the transmission of thermal radiation emitted by the human body directly to the environment. Here, we present a conceptual framework to thermally and optically design an ITVOF. Using a heat transfer model, the fabric was found to require a minimum infrared (IR) transmittance of 0.644 and a maximum IR reflectance of 0.2 to ensure thermal comfort at ambient temperatures as high as 26.1 o C (79 o F). To meet these requirements, an ITVOF design was developed using synthetic polymer fibers with an intrinsically low IR absorptance. These fibers were then structured to minimize IR reflection via weak Rayleigh scattering while maintaining visible opaqueness via strong Mie scattering. For a fabric composed of parallel-aligned polyethylene fibers, numerical finite element simulations predict 1 μm diameter fibers bundled into 30 μm yarns can achieve a total hemispherical IR transmittance of 0.972, which is nearly perfectly transparent to mid-and far-IR radiation. The visible wavelength properties of the ITVOF are comparable to conventional textiles ensuring opaqueness to the human eye. By providing personal cooling in a form amenable to everyday use, ITVOF-based clothing offers a simple, low-cost solution to reduce energy consumption in HVAC systems. TOC Graphic

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Section: Design and Simulation Of An Itvofmentioning

confidence: 99%

Infrared-Transparent Visible-Opaque Fabrics for Wearable Personal Thermal Management

et al. 2015

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Textile Fiber Production of Biopolymers – A Review of Spinning Techniques for Polyhydroxyalkanoates in Biomedical Applications

2022

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Structure and properties of nucleated polypropylene fibres

Krmelová¹,

Gavendová²,

Zatroch

et al. 2020

IOP Conf. Ser.: Mater. Sci. Eng.

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This work is focused on the evaluation of the structure and properties of the nucleated polypropylene (PP) fibres prepared by melt spinning technique at lower take-up velocities as pre-oriented fibres (POY) containing 0.3–1.5 wt. % of additives - nucleating agents like 1,3:2,4-dibenzylidene sorbitol (DBS), quinacridone (QA) and calcium carbonate (CC). The thermal properties of nucleated PP fibres were determined by using differential scanning calorimetry (DSC). Used additives promote nucleation activity, DBS and QA better than CC, as they increased the crystallization temperature to higher extent than CC. Effect of CC seems to be negligible, due to very little impact on melting point and crystallization temperature. Morphological characteristic of the PP fibres were observed by means of scanning electron microscopy. The morphology of nucleated PP is different significantly from that of reference non-nucleated PP fibre. The measured values of the above mentioned properties were compared with parameters of non-nucleated PP fibre prepared under same technological conditions.

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Types of polyolefin fibres

Cited by 4 publications

References 21 publications

Infrared-Transparent Visible-Opaque Fabrics for Wearable Personal Thermal Management

Infrared-Transparent Visible-Opaque Fabrics for Wearable Personal Thermal Management

Textile Fiber Production of Biopolymers – A Review of Spinning Techniques for Polyhydroxyalkanoates in Biomedical Applications

Structure and properties of nucleated polypropylene fibres

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