Analysis of factors affecting the waterproofness of elastic composite textile materials for clothing

The article discusses the results of a preliminary research of factors affecting the level of waterproofness of elastic composite laminates with a membrane on a knitted basis under repeated stretching at low temperatures. The materials used in the apparel industry for the manufacture of waterproof household clothing and sportswear have been investigated. The analysis of the influence of the structure of materials, the number of stretching cycles, temperature on the stability of the level of waterproofing is carried out. It is revealed that the waterproofness of elastic composite laminated membrane materials on a knitted basis when they are repeatedly stretched by 10 % of the initial length under conditions of low air temperature in the range from 0 °C to -30 °C significantly decreases with decreasing temperature, regardless of the number of stretching cycles.