Flame retardant finishing process of polyester flame retardant fabric
Flame retardant finishing process of polyester flame retardant fabric
The intumescent flame retardant for polyester flame retardant fabrics uses phosphorus and nitrogen as the main elements. When heated, the surface can generate a uniform carbon foam layer, which can insulate heat, oxygen, smoke, and avoid droplets. It has good properties. Flame retardant properties. Research shows that polyester fibers treated with intumescent flame retardants have good flame retardant and anti-melting effects. Although intumescent flame retardants have been extensively studied in plastics, rubber and synthetic polymers, there are still few flame retardant treatments for polyester.
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Polyester flame-retardant fabrics mainly achieve flame-retardant effects through flame-retardant modification of raw yarns or surface treatment modifications. As one of the surface treatment modification methods, fabric flame retardant finishing has the advantages of simple process and low cost. Among them, phosphorus-containing flame retardants have low toxicity and high efficiency, and are widely used in polyester. Phosphorus flame retardants mainly play a flame retardant role in the condensed phase by promoting carbonization of polymers.
The traditional intumescent flame retardant system is composed of acid source, carbon source and gas source. The acid source first releases inorganic acids with dehydrating effects such as phosphoric acid and pyrophosphoric acid, which undergo an esterification reaction with the polyol. The entire system melts during this process; the gas source generates non-combustible gas and water vapor, causing the melted system to foam and expand. ; The carbon source is further dehydrated and carbonized under the action of the dehydrating agent to generate organic matter and coke residues, causing the entire system to melt and expand to form a foamed carbon layer.
Polyester flame-retardant fabric has high fiber strength, excellent heat resistance and chemical stability, and is widely used in home textiles and various interior fabrics. However, it melts easily and poses a great fire hazard. Therefore, it is very important to study the flame retardant technology of polyester textiles and develop flame retardant polyester textiles.
This test uses an expansion system composed of a phosphorus-containing flame retardant and a nitrogen-containing flame retardant that can produce non-flammable gas. Through appropriate post-treatment processes, polyester fabrics with good flame-retardant properties are obtained, and the treated fabrics maintain a good feel. The reduction in breaking strength is small.
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