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Ivashko E.I., Burkin A.N. Influence of temperature and outdoor air velocity on vapor permeability of moisture-protective materials. Journal of Clothing Science. 2024; 9(4). Available at: https://kostumologiya.ru/PDF/28TLKL424.pdf (in Russian).

Influence of temperature and outdoor air velocity on vapor permeability of moisture-protective materials

Ivashko Ekaterina Igorevna
Vitebsk State Technological University, Vitebsk, Republic of Belarus
E-mail: ivashkokatrinka@mail.ru
ORCID: https://orcid.org/0000-0002-3124-2104
RSCI: https://elibrary.ru/author_profile.asp?id=1098730
SCOPUS: https://www.scopus.com/authid/detail.url?authorId=58567181400

Burkin Alexander Nikolaevich
Vitebsk State Technological University, Vitebsk, Republic of Belarus
E-mail: a.burkin@tut.by
ORCID: https://orcid.org/0000-0002-2963-6390
RSCI: https://elibrary.ru/author_profile.asp?id=800250
SCOPUS: https://www.scopus.com/authid/detail.url?authorId=57473838700

Abstract. The article reveals the importance of permeability of materials from which clothing is made, its role in creating favorable conditions and normal functioning of the human body. To such an indicator the authors refer to the index of vapor permeability, which determines the ability of the material to conduct vaporous moisture through a unit area of the sample for a certain time. In the article the authors note a great variety of existing methods and test equipment used to determine the vapor permeability of materials used for clothing and emphasize the significant difference in the values obtained by different methods. It is also noted that most of the existing methods do not provide close to operational test conditions, so the authors propose as an alternative to use the method of determining the vapor permeability of moisture-protective materials, which allows modeling various operating conditions, and a device for its implementation. The significance of test conditions for interpretation of research results and identification of factors that have a significant impact on the ability of moisture-protective materials to transport water vapor from the space under the clothes to the outside is shown. The authors have revealed dependences of vapor permeability of materials with polyurethane microporous coating and membrane layer on temperature and outdoor air velocity, which allow predicting vapor permeability of moisture-protective materials at air temperature from plus 5°C to plus 15°C at outdoor air velocity from 0 to 4 m/sec. It was revealed that with decreasing ambient air temperature and increasing outdoor air velocity the vapor permeability of moisture-protective materials will increase.

Keywords: vapor permeability; operating conditions; temperature; outdoor air velocity; moisture-protective materials; overalls; influence

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