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The research and analysis of the bactericidal properties of the spacer knitted fabric with the UV-C system

Łada-Tondyra Ewa, Jakubas Adam, Jabłońska Beata, Stańczyk-Mazanek Ewa

Opto-Electronics Review

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2021

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Vol. 29, No. 4

192--200

EN

The research and analysis of the bactericidal properties of the spacer knitted fabric with the UV-C system are presented in this paper. The disintegration factor affecting the bacteria in the knitted fabric is the UV-C radiation in the range of 265–270 nm distributed via woven optical fibres. The way of integrating elements of the system generating the UV-C radiation in the structure of the spacer knitted fabric was designed, as well as various configurations of optical fibres arrangement, fibre density, number of radiation sources, and diode types were tested. The material was contaminated with selected microorganisms indicative of sanitary contamination and important in terms of nosocomial infections. The scope of the research included microbiological (quantitative and qualitative) analyses of selected taxonomic groups of microorganisms (mesophilic bacteria, fungi, actinomycetes) before and after the irradiation process. The analysis of the research results and the applied modification of the knitted fabric turned out to be effective in reducing the amount of potentially pathogenic microorganisms.

2

Moisture and Thermal Transport Properties of Different Polyester Warp-Knitted Spacer Fabric for Protective Application

Chen Qing, Shou Dahua, Zheng Rong, Tang Ka-Po Maggie, Fu Bailu, Zhang Xiaoting, Ma Pibo

Autex Research Journal

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2021

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Vol. 21, no. 2

182--191

EN

Warp-knitted spacer fabrics are generally used for sportswear, functional clothing, protective clothing, and other applications. This article studied the heat and mass transfer properties of polyester warp-knitted spacer fabrics from low thickness (2 mm) to high thickness (20 mm), from low mass (247.34 g/m2) to high mass (1,585.9 g/m2), and surface structure in plain or mesh construction. Water vapor permeability, air permeability, water absorption, and thermal insulation property were conducted to evaluate the spacer fabrics. The results revealed that with increasing volume density the water vapor permeability of spacer fabrics decreased, but the water absorption ratio increased. The water vapor permeability of fabrics increased when thickness decreased and volume density increased. It was further found that spacer fabrics with mesh worn nearby the skin and plain structure worn far from the skin could facilitate water vapor and air transmission. The difference of 8.82% for water vapor permeability and 14.19% for air permeability were found between testing mesh side up and down for the spacers (2.56 and 3.37 mm), respectively. Thermal insulation ratio was highly and significantly correlated with heat transfer coefficient at −0.958 and with thickness at 0.917. Thermal insulation ratio is highly and significantly correlated with air permeability at 0.941.

3

Porównanie systemów tekstronicznych ograniczających rozwój bakterii

Łada-Tondyra Ewa, Jakubas Adam

Przegląd Elektrotechniczny

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2020

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R. 96, nr 2

121--124

PL

Postęp technologiczny i miniaturyzacja elektroniki pozwalają na opracowanie nowych materiałów tekstronicznych, które można zastosować w codziennym użytku. Zastosowanie diod emitujących promieniowanie ultrafioletowe umożliwia przeprowadzanie sterylizacji w domu i pomieszczeniach szpitalnych. Zachowanie sterylnej czystości ma szczególne znaczenie w placówkach medycznych i gabinetach zabiegowych. Badania wskazują, że największy efekt bakteriobójczy występuje przy długości fali promieniowania od 250 do 270 nm. Zastosowanie systemu generującego promieniowanie ultrafioletowe w materiale tworzącym pokrycie materaca pozwoliłoby na znaczną redukcję mikroorganizmów w bezpośrednim sąsiedztwie pacjenta.

EN

Technological progress and the miniaturization of electronics allow one to develop new textronic materials that can be applied in everyday use. The use of ultraviolet-emitting diodes makes it possible to carry out sterilization at home and in hospital rooms. The preservation of sterile cleanliness is of particular importance in medical facilities and treatment rooms. Studies indicate that the greatest bactericidal effect occurs at radiation wavelengths from 250 to 270 nm. The use of a system that generates ultraviolet radiation in the fabric constituting of the mattress cover, would allow one for a significant reduction of microorganisms in the immediate vicinity of the patient.

4

Comparison of GA-Optimized Viscoelastic Models for the Characterization of Compression Behavior of Warp-Knitted Spacer Fabrics

Yousefpour M., Ahmadi M. S., Payvandy P.

Autex Research Journal

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2018

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Vol. 18, no. 3

209--215

EN

Nowadays, Warp-Knitted Spacer Fabrics (WKSF) have been widely used for many technical applications. Compressional behavior of WKSF is one of their important properties. Physical modeling is one of the solutions to predict these properties for engineered designing of WKSF. In this study, four common physical models are introduced and compared in order to simulate compressional behavior of polyester WKSF. Genetic Algorithm (GA) was applied to optimize each model parameter. The results showed that the Burger model has the highest adoption with 0.2 percent Mean Absolut Error (MAE). The effect of thickness, outer fabric structure and spacer monofilament density on viscoelastic properties of the samples were also studied.

5

An Experimental Study Of The Compression Properties Of Polyurethane-Based Warp-Knitted Spacer Fabric Composites

Chen S., Zhang X., Chen H., Gao X.

Autex Research Journal

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2017

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Vol. 17, no. 3

199--205

EN

The present work has reported the compression properties of polyurethane-based warp-knitted spacer fabric composites (PWSF). In order to investigate the effect of structural parameters of fabric on the compression performance of composites, a series of warp-knitted spacer fabrics (WSF) with different structural parameters including spacer yarn inclination angle, thickness, fineness of spacer yarns, and outer layer structure have been involved. The produced composites have been characterized for compression properties. The energy-absorption performance during the compression process has been determined as a function of the efficiency and the compression stress obtained from compression tests. The results show that the composites based on spacer fabrics having smaller spacer yarns inclination angle, higher fabric thickness, finer spacer yarn, and larger mesh in outer layers perform better with respect to energy-absorption properties at lower stress level, whereas at higher stress level, the best energy-absorption abilities are obtained in case of spacer fabrics constructed of larger spacer yarn inclination angle, lower fabric thickness, coarser spacer yarn, and smaller mesh in surface layers.

6

Mechanical Properties Of 3D-Structure Composites Based On Warp-Knitted Spacer Fabrics

Chen S., Long H. R., Liu Y. H., Hu F. H.

Autex Research Journal

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2015

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Vol. 15, no. 2

127--137

EN

In this paper, the mechanical properties (compression and impact behaviours) of three-dimension structure (3D-structure) composites based on warp-knitted spacer fabrics have been thoroughly investigated. In order to discuss the effect of fabric structural parameters on the mechanical performance of composites, six different types of warp-knitted spacer fabrics having different structural parameters (such as outer layer structure, diameter of spacer yarn, spacer yarn inclination angle and thickness) were involved for comparison study. The 3D-structure composites were fabricated based on a flexible polyurethane foam. The produced composites were characterised for compression and impact properties. The findings obtained indicate that the fabric structural parameters have strong influence on the compression and impact responses of 3D-structure composites. Additionally, the impact test carried out on the 3D-structure composites shows that the impact loads do not affect the integrity of composite structure. All the results reveal that the product exhibits promising mechanical performance and its service life can be sustained.