Reasons that affect the flame retardancy of non-woven fabrics

Answer: The reasons why polyester wool has a flame retardant effect are as follows:

(1) The oxygen limiting index of conventional polyester cotton is 20-22 (the oxygen concentration in the air is 21%), which is a kind of combustible fiber, which is easy to ignite but the burning speed is slow.

(2) If the polyester chip is modified and denatured, it will have a flame retardant effect. Most of the long-acting flame-retardant fibers use modified polyester chips to produce flame-retardant polyester wool. The main modifier is phosphorus series compounds. When phosphorus is used in high heat, it will combine with oxygen in the air to reduce the oxygen content. flame retardant effect.

(3) Another method to make polyester wool flame retardant is surface treatment. This kind of product thinks that the treatment agent will reduce the flame retardant effect after many times of processing.

(4) Polyester wool has the characteristic of shrinking when it encounters high heat. When the fiber encounters a flame, it is not easy to ignite due to shrinkage and is separated from the flame, resulting in an appropriate flame retardant effect.

(5) Polyester wool will melt and drip when it encounters high heat, and the melting and dripping phenomenon produced by polyester wool after ignition can also take away part of it.

Heat and flame to produce appropriate flame retardant effect.

(6) However, if the fibers are stained with grease that is easy to support combustion or use silicone oil that can set the shape of polyester wool, the polyester wool will reduce the flame retardant effect. In particular, when polyester wool containing SILICONE oil is exposed to flame, the fibers cannot shrink and burn.

(7) The method of increasing the flame retardant of polyester wool. In addition to using flame-retardant modified polyester chips to produce polyester wool, post-treatment of the fiber surface with an oil with a high phosphate content can also increase the flame retardant effect of the fiber. . Because the phosphorus molecules released by the phosphates encounter high heat, they will combine with the oxygen molecules in the air and reduce the oxygen content in the air to increase the flame retardant properties.

The baby stroller produced by your company needs to pass the British BS5852 level flame retardant inspection standard. At present, conventional polyester cotton can meet this standard. In order to ensure that it can pass this inspection, it is recommended to use high phosphate oil for the selection of fibers. polyester wool