What are the methods of flame retardant polyester fiber and its fabric?

You should be talking about the flame retardant principle of flame retardant fabrics, right?

There are two kinds of flame retardant mechanisms, physical and chemical, and there are four mature theories about flame retardant (Xinxiang Yulong Textile).

1. melt covering theory

The viewpoint of melt covering theory is that after the flame retardant contacts with fire, it will produce a glassy adhesive substance, which will cover the burning object, thus isolating it from oxygen and achieving the purpose of flame retardant.

Gas phase theory

The viewpoint of gas phase theory is that a large number of hydroxyl radicals generated after solid decomposition combine with the radicals generated when the flame retardant is heated to generate new substances, and the free radicals in combustible gas are continuously cut off to achieve the purpose of flame retardant.

3. Endothermic reaction

The viewpoint of endothermic reaction is that the flame retardant decomposes and absorbs heat during combustion, which reduces the heat required for pyrolysis of the burned object and prevents the burned object from continuing to burn.

4. Chemical theory

The viewpoint of chemical theory is that flame retardant, as a component, takes part in chemical reactions to generate incombustible or flame-retardant substances, thus achieving the purpose of flame retardant.