What are the common wire and cable flame retardants? Wh […]
What are the common wire and cable flame retardants? What are their advantages and disadvantages? Here are some of the types and characteristics of commonly used wire and cable flame retardants!
I. lanthanide flame retardant
The advantage of lanthanide flame retardant is that although antimony trioxide cannot be used alone as a flame retardant, it can be used with a certain proportion of halogen compounds to achieve particularly effective flame retardant properties. But there is also a fatal flaw. The lanthanide is a heavy metal material and contains toxins. It is the same kind of substance as arsenic. The crude product generally contains other heavy metals such as arsenic. Arsenic trioxide is an arsenic. It cannot be used as a green material in society.
Second, aluminum hydroxide flame retardant
Advantages: low price and good flame retardancy.
Disadvantages: poor heat resistance, dehydration begins at 200 ° C, complete dehydration at 330 ° C to 350 ° C, and the curing of the resin is mostly in the dehydration temperature range of the aluminum hydroxide, thus causing foaming in the finished synthetic resin, the surface is uneven, dielectric Performance is reduced and yield is low. Applied to high temperature, the silica gel is fogged, the product is blistering, and the dielectric property is lowered. EC≈60~100μS/cm, easy to absorb moisture.