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  1. Article: The Effect of Mask Style and Fabric Selection on the Comfort Properties of Fabric Masks.

    Gericke, Adine / Militký, Jiří / Venkataraman, Mohanapriya / Steyn, Hester / Vermaas, Jana

    Materials (Basel, Switzerland)

    2022  Volume 15, Issue 7

    Abstract: The purpose of fabric masks in the prevention of the spread of COVID-19 often requires that the masks be worn for extended periods without removal. The management of the conditions in the micro-climate inside the masks is important to keep the wearer ... ...

    Abstract The purpose of fabric masks in the prevention of the spread of COVID-19 often requires that the masks be worn for extended periods without removal. The management of the conditions in the micro-climate inside the masks is important to keep the wearer comfortable and enhance user compliance. In this study, the effect of mask design and fabric type on the micro-climate was investigated using thermocron iButtons to record the temperature and humidity inside the masks. It was found that the mask style, and its effect on the amount of air incorporated in the micro-climate, had a significant influence on the factors that determine the temperature and humidity levels. In the shaped masks, the impact of the mask design on the results was stronger than the effect of fabric type. In the folded masks that fit snugly around the face, the effect of fabric type was significant, and both fibre composition and fabric structure contributed to the differences in the performance of the three fabrics tested. In the case of the masks with an inserted filter, a significant amount of trapped still air in the fabric layers and the increased mask stiffness had the strongest effect on the temperature and humidity inside the masks. Significant differences were also found in the temperatures recorded in the different time segments, highlighting the importance of conducting comfort evaluations over a long enough time to prevent false interpretations. The results of this study emphasize the importance of considering all the components of mask design, namely style, fibre type, and fabric structure, in the development of masks to enhance user compliance.
    Language English
    Publishing date 2022-03-31
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma15072559
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Unmasking the Mask: Investigating the Role of Physical Properties in the Efficacy of Fabric Masks to Prevent the Spread of the COVID-19 Virus.

    Gericke, Adine / Venkataraman, Mohanapriya / Militky, Jiri / Steyn, Hester / Vermaas, Jana

    Materials (Basel, Switzerland)

    2021  Volume 14, Issue 24

    Abstract: To function as source control, a fabric mask must be able to filter micro-droplets (≥5 µm) in expiratory secretions and still allow the wearer to breathe normally. This study investigated the effects of fabric structural properties on the filtration ... ...

    Abstract To function as source control, a fabric mask must be able to filter micro-droplets (≥5 µm) in expiratory secretions and still allow the wearer to breathe normally. This study investigated the effects of fabric structural properties on the filtration efficiency (FE) and air permeability (AP) of a range of textile fabrics, using a new method to measure the filtration of particles in the described conditions. The FE improved significantly when the number of layers increased. The FE of the woven fabrics was generally higher, but double-layer weft knitted fabrics, especially when combined with a third (filter) layer, provided a comparable FE without compromising on breathability. This also confirmed the potential of nonwoven fabrics as filter layers in masks. None of the physical fabric properties studied affected FE significantly more than the others. The variance in results achieved within the sample groups show that the overall performance properties of each textile fabric are a product of its combined physical or structural properties, and assumptions that fabrics which appear to be similar will exhibit the same performance properties cannot be made. The combination of layers of fabric in the design of a mask further contributes to the product performance.
    Language English
    Publishing date 2021-12-15
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma14247756
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Investigation of thermal comfort properties of fabrics containing mohair

    Gericke, Adine / Militky, Jiri / Venkataraman, Mohanapriya / Steyn, Hester J. / Vermaas, Jana

    The journal of the Textile Institute. 2022 Mar. 17, v. 113, no. 4

    2022  

    Abstract: Mohair is one of the most luxurious and best quality natural fibers. Recent developments focused on expanding the use of mohair in technical and functional textile products. It necessitated the need for an improved understanding of how the usage of ... ...

    Abstract Mohair is one of the most luxurious and best quality natural fibers. Recent developments focused on expanding the use of mohair in technical and functional textile products. It necessitated the need for an improved understanding of how the usage of mohair in fabrics will impact its thermal comfort related properties. Despite its popularity, little information is available on the quantification of thermo-physiological comfort properties of mohair fabrics. This study investigated the effect of fibrous matter composition and fabric structural parameters on conductive and convective heat transfers to study the thermal comfort properties of mohair fabrics. The results showed that fabric structural properties such as overall porosity, and specifically thickness, played a significant role in determining the thermal comfort properties of the fabrics. Fiber composition had an impact on thermal properties as the fabrics containing mohair or mohair/wool were consistently thicker, providing higher thermal resistance as well as resistance to the free flow of air that allows thermal convection. It may be concluded that the thicker structures of mohair or mohair/wool trap more air, providing higher thermal insulation.
    Keywords air ; convection ; fabrics ; heat tolerance ; insulating materials ; mohair ; porosity ; wool
    Language English
    Dates of publication 2022-0317
    Size p. 616-627.
    Publishing place Taylor & Francis
    Document type Article
    ISSN 1754-2340
    DOI 10.1080/00405000.2021.1896158
    Database NAL-Catalogue (AGRICOLA)

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