Types and Development of Flame Retardant PA6

As an organic material, PA6 Compound has obvious flammability. PA6 has a high burning rate in flame and high heat release, especially a large number of flaming droplets generated during combustion, which increases the risk of fire transmission. Industrially used PA6s are available in both enhanced and unreinforced versions, all requiring a V0 rating. The enhanced PA6, especially the glass fiber reinforced, is more flammable due to the "wicking effect" of the glass fiber, which limits its application in the fields of electronics, transportation, and transportation. The development of a flame retardant PA6 with excellent comprehensive performance is of great significance for expanding the application range of the engineering plastic and increasing its added value.

Flame retardants suitable for PA6 can be basically divided into halogen, phosphorus, nitrogen and inorganic compounds, due to the flame retardant mechanism, flame retardant efficiency and properties of polymer materials. There are large differences in the degree. Therefore, the reasonable selection of flame retardants is a key factor in the preparation of flame retardant PA6 with excellent properties. The following Flame Retardant PA6 Factory will introduce the flame retardant effects, advantages and disadvantages of various flame retardants.

Halogen flame retardant PA6

Halogen flame retardant is a traditional flame retardant for flame retardant PA6, which has the advantages of moderate filling amount, high flame retardant efficiency, moderate price, and high-cost performance. Because it can terminate the chain reaction during polymer combustion, it is not only suitable for the unreinforced PA6 system, but also for the glass fiber reinforced PA6 system.

Inorganic filler flame retardant PA6

The inorganic filler type flame retardant is an environmentally friendly flame retardant. It is very widely used. At present, aluminum hydroxide and magnesium hydroxide are the most important inorganic filler type flame retardants. The flame retardant mechanism of the flame retardant is that the magnesium hydroxide releases the bound water when heated, absorbs a large amount of heat, reduces the temperature of the material in the flame, and the metal oxide after losing the crystal water has a high melting point and can be covered by the burning. The surface of the material is insulated by oxygen and catalyzes the action of PA6 into carbon. The dehydration temperature of aluminum hydroxide is 220 ° C, which is lower than the processing temperature of PA6 and therefore not suitable for flame retardant PA6, and the dehydration temperature of magnesium hydroxide is 340 ° C, which is stable during the processing of PA6.

The main advantages of this type of flame retardant are a rich source, low price, which is beneficial to reduce the cost of the polymer; no corrosive gas, no toxicity, and smoke suppression. The disadvantages are mainly that the flame retardant has low efficiency and large addition amount; the surface has high polarity, and the interface compatibility with the resin is poor, and the problem of density increase and mechanical property deterioration after filling with nylon is caused. Therefore, ultra-fine refinement and surface modification have become the focus of research on this type of flame retardant.

Phosphorus flame retardant PA6

The phosphorus-based flame retardant includes an organic phosphorus-based flame retardant and an inorganic phosphorus-based flame retardant. Among them, organophosphorus flame retardants mainly include trisphenol phosphate, triester phosphate, propylbenzene phosphate, and butylbenzene phosphate. Inorganic phosphorus-based flame retardants mainly include red phosphorus and ammonium polyphosphate.

Xinyite is committed to the research and development of Twenty Years. It's Flame Retardant Nylon PA6 Granules has the property of significantly delaying the flame spread. After the flame retardant modification of PA6, the heat resistance is significantly enhanced compared with the masterbatch, which is mainly suitable for high-temperature environments. In the automotive, electrical and other industries, it is deeply trusted by consumers.