The flame retardancy of a fiber is generally exp […]
The flame retardancy of a fiber is generally expressed in terms of a limiting oxygen index (LOI, which is the percentage of the lowest oxygen content that sustains combustion). The oxygen content in the air is approximately 21%. If the fiber's LOI value is greater than 21%, after leaving the flame, it cannot continue to burn in the air. Generally, fibers having an LOI greater than 26% are considered to be flame retardant fibers. Flame retardant nitrile chloride fiber is the main fiber type for producing flame retardant fabrics in China. The LOI value is above 26%, the flame retardancy is good, the dimensional stability is good, the sunlight resistance is similar to that of acrylic fiber, the hand feel is comfortable, the drape is good, the resilience is good, the dyeing is easy, and the color fastness is good.
In addition, in the macromolecular chain of the fiber-forming polymer, an aromatic ring or an aromatic heterocyclic ring is introduced to increase the rigidity of the molecular chain, the concentration and cohesion of the macromolecule, thereby improving the thermal stability. For example, aramid 1313 (Nomex) is also a flame retardant fiber with good flame retardancy.
Soybean protein fiber: It is independently developed by Chinese scientists and technicians, and has taken the lead in industrial production in the world. It is also the only complete intellectual property fiber invention obtained in China. It is a new type of catastrophic vegetable protein fiber made by extracting soybean protein and a variety of trace elements beneficial to the human body.