Classification of commonly used flame retardants
A wide variety of flame retardants, there are many ways to classify. According to the flame retardant elements, divided into halogen-containing flame retardant, phosphorus flame retardant, nitrogen flame retardant, etc .; according to the use of flame retardants and polymer in the existence of the form, divided into additive and reaction Type; semi-durable flame retardant finishing agent, durable flame retardant finishing agent three; according to the type of compound can be divided into inorganic flame retardant and organic flame retardant Agent.
(1) non-durable flame retardant finishing agent: also known as temporary flame retardant finishing agent, most of the water-soluble (or emulsion) inorganic salts. Treatment of the first flame retardant dissolved in water, the fabric can be used by impregnation drying; there are two bathing, the second bath with ammonia or soda ash, the oxide deposition on the fabric. This method is simple, cheap, but the fabric feel less, after washing a significant decline in flame retardant effect. Used in a one-time protective clothing.
(2) semi-durable flame retardant finishing agent: Flame-retardant textiles treated with this process can withstand 1 to 10 times moderate washing, but not high temperature soaping. The method has urea phosphate method (usually called Banflam method), phosphoric acid urethane method, ammonium phosphate monomethyl methyl cyanide - methyl acetate mixed solution method. (3) Durable flame retardant finishing agent: the use of chemical method in the fiber surface polymerization or condensation reaction, the formation of water-insoluble polymer, generally require more than 30 times the degree of washing. The law is mainly Ciba (CP) and Proban law. CP method by the Swiss company to create the Ciba, the law is easy to implement the process, the flame retardant effect is significant; the disadvantage is a large loss of fabric strength, a greater impact on the performance of clothing. The Proban method was created by the British Aubrey-Wilson Co., Ltd., which fabricated with good flame-retardant effect, especially after handling the fabric's feel and strong retention is unmatched by any other finishing method, but this method is more dangerous Large, environmental pollution is serious, so the promotion is limited.