The International Fire Protection Association (NFPA) has established the "Standard for Fire Fighting Apparel and Related Applications", which includes the three minimum comprehensive performance standards for chemical protective clothing. The delegates agreed that in the next few years, the number and type of protective clothing standards will rapidly increase, and new standards that will continue to surge will involve protective clothing performance testing techniques and provisions to increase their overall performance;
The increase in the standard of protective clothing will also promote the development of the protective clothing industry in the following areas:
(1) Producers will test their protective clothing products according to uniform standards;
(2) It is also possible to develop and improve its products using protective clothing performance specification indicators and instructions;
(3) Users will use a common method to understand the performance characteristics of protective clothing and give fuller play to its protective role;
(4) It can also increase the end-user's trust in protective clothing products.
When choosing personal protective equipment, you must first identify three important factors:
(1) What kind of protection level is required?
(2) What kind of insulation fabric can provide the best protection?
(3) Are there protective clothing products that can be selected on the market today?
Hazardous material expert David W. Berry divided protective clothing into the following four main levels:
(1) Class D is an ordinary work clothes with little or no chemical protection;
(2) Class C garments, which are entirely coated with chemical splash protection, are equipped with a purified air respirator (which has a certain protective effect on the respiratory system, mucous membranes and skin);
(3) Class B is a chemical-resistant splash suit with overall coverage, with a positive pressure respirator (SCBA) or a vented tube for air respirator (optimum protection of the respiratory system and mucous membranes) And have a protective effect on the skin;
(4) Class A airtight protective clothing with integral overwrap, self-contained positive pressure respirator (SCBA) or exhaust air respirator for air respirator (SABA), most suitable for respiratory system, mucous membrane and skin Good protection effect.
At present, many composite and coated fabrics are used to manufacture protective clothing, including para-aramid fabrics coated with PTFE, copolymer-spunbond nonwoven fabrics, and Saranex. The coating materials used are fluorocarbons. Compounds, fluororubbers, butyl rubber and other chemicals.
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