engleski

TESTING ELECTROSTATIC PROPERTIES OF POLYURETHANE COATED TEXTILES USED FOR PROTECTIVE CLOTHING

The objective of the study is to test electrostatic properties of textiles used for protective clothing worn in flammable and potentially explosive environment. The protective clothing is intended for multi-use and, apart from wear and stretching during use, is also exposed to the impacts of various cleaning agents. The testing is carried out in accordance with EN 1149-1: 1995 specifying requirements for electrostatic properties and testing methods for protective clothing to be worn in specific situations. EN 1149-1 requires measuring surface resistance at 25% &#61617 ; 2% relative humidity and temperature of 220C &#61617 ; 20C. Measurements are taken of weaves of various fabrics coated with polyurethane. The fabrics used are made of polyamide, polyester and cotton. All materials are coated with the same polyurethane coating. All the samples are tested for surface resistance before and after five dry-cleanings and machine washings. In addition to the European standard required, surface resistance is also measured at the following relative humidity values: 35%, 45%, 55% and 65%. The results obtained are processed employing correlation analysis and regression analysis and shown graphically.

polyurethane coated textile; protective clothing; electrostatic properties; surface resistance

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