What are the types of flame retardants commonly used in fabrics?1
The flame retardant performance test of fabrics and the flame retardant performance test of fabrics are the standards that must be tested in many textile industries. The flame retardant effect of textiles is generally chemical properties such as adding flame retardants. Therefore, there are different flame retardant additives for the flame retardant effect of textiles. , this article will focus on the types of flame retardants commonly used in fabrics from the Engineering Division of (Hong Kong) Co., Ltd. 1. Classification according to the contained flame retardant elements·And HX, HX can dilute the combustible gas generated when the fiber is cracked, or cut off the contact with the air. 2. Phosphorus-containing flame retardants generate phosphoric anhydride or phosphoric acid during the combustion process, which promotes dehydration and carbonization of textiles and prevents or reduces the generation of flammable gases. In addition, phosphoric anhydride forms a glass-like melt covering the fabric during pyrolysis, which promotes its oxidation to generate carbon dioxide and plays a flame retardant role. 3. Nitrogen-containing flame retardants Nitrogen compounds can interact with cellulose, promote cross-linking into carbon, reduce the decomposition temperature of fabrics, and produce non-combustible gas, which plays the role of diluting combustible gas. 2. Classification according to the durability of flame retardant fabrics 1. Non-durable flame retardant finishing agent Temporary flame retardant finishing agent. Most are water-soluble or emulsion inorganic salts. When treating, the flame retardant is first dissolved in water, and the fabric can be used after dipping and drying. There are also two-bath padding, and the second bath uses ammonia water or soda ash to deposit metal oxides on the fabric. The method is simple in process and low in price, but the hand feeling of the fabric is poor, and the flame retardant effect is greatly reduced after washing. 2. Semi-durable flame retardant finishing agent Its flame retardant products can withstand one mild washing, but not high temperature soaping. The method includes urea-phosphoric acid method, urethane phosphate method, etc. 3. Durable flame retardant finishing agent uses chemical method to carry out polymerization or condensation reaction on the inner surface of fiber to form water-insoluble polymer. Generally, it is required to have a washing resistance of more than 30 times. Different types of flame retardants should be used for knitted fabrics of different materials to obtain better flame retardant effect. Decorative fabrics are deeply loved by consumers for their gorgeous appearance and comfortable performance. Therefore, when the fabrics are flame-retardant finishing, the influence of flame retardants on the color, appearance, feel and other physical and mechanical properties of the fabrics should be fully considered.
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