Bulletin of
Vitebsk State
Technological
University

ABSTRACT

Anticipated weather conditions should be taken into account when designing water protection products for employees whose professional activities are carried out outdoors. The dimensions of the protective elements are unified or standardized disregarding the most likely area of water impact on the parts of the products. The influence of the inclination angle of areas of the clothing surface, including those with seams, on the duration of their wetness was experimentally investigated. The experiment was conducted using a specially created and patented installation.

Research findings indicate that the angle of the surface portion of the article in space, taking into account the direction of the water flow, significantly affects its resistance to blotting. The duration of the soaking time is minimal in those areas of the garment where water falls at angles from 60º to 90º to the surface. Joint seams shall not be located in these areas. Thread seams of all types of structures get wet faster than fabric. Vertical joints are more resistant to blotting.

The relationships of the average rate of change of the wet area from the angle of inclination to the vertical on each of the investigated sections were analyzed. The analysis demonstrated that it is necessary to take into account the maximum angle of fall of water on the inclined surface of clothing. He showed that it is necessary to take into account the maximum angle of fall of water on the inclined surface of clothing. The minimum zone of probable wetness protected by pads has been determined: on the back it should include the shoulder section from the shoulder seam to the level of at least 25–30º to the vertical; on the front surface – the entire upper surface of the chest also to a level where the slope of the front surface is at least 8–10º to the vertical.

Characteristics of the Se wing Product Blotting Process when Exposed to Sprinkling Irrigation