The disadvantage of ordinary plastic hollow plate products is flammable, and the combustion will produce smoke or harmful gas, so the aerobic index is used to evaluate the combustion performance of plastic products. The higher the oxygen index, that is, the more oxygen is required to maintain the equilibrium combustion, the harder the material is to burn. The oxygen index of polypropylene, the raw material of hollow board, is 17.5. Therefore, to make ordinary hollow board become flame retardant hollow board, it is necessary to increase the oxygen index by adding flame retardant agent, so as to achieve higher flame retardant requirements.

So what are flame retardants? How does it improve the oxygen index of the hollow plate?

Flame retardant is divided into two kinds, one is added flame retardant, the other is reactive flame retardant, the more commonly used is added flame retardant, hollow plate is also used in this method.

Added flame retardant is to add some inorganic flame retardant in plastic products ingredients, such as aluminum hydroxide, magnesium hydroxide, talc powder, antimony trioxide and so on; Or add some organic flame retardants, such as halogens; Decabromodiphenyl ether, tetrabromodiphenol A, phosphorous flame retardants, phosphate esters, trichloroethyl phosphate esters; Or add some high polymer flame retardant resin, such as polyvinyl chloride, chlorinated polyethylene, etc.

Reactive flame retardant is the reactive flame retardant added to polymer or prepolymer, chemical combination, become a part of the resin composition, at the same time to give the polymer its own flame retardant property. Common reactive flame retardants include tetrabromobisphenol A, dibromomethyl glycidyl ether, dibromon-propyl alcohol, dibromoethylene, tetrabromophthalic anhydride and phosphate-containing polyols.

Flame retardant hollow plate has flame retardant, because of the addition of flame retardant, flame retardant is the application of flame retardant technology in real life, it is a kind of special chemical additives used to improve the combustion performance of flammable materials, widely used in all kinds of packaging materials flame retardant processing. The hollow plate processed by flame retardant can effectively prevent, delay or terminate the spread of flame when attacked by external fire sources, so as to achieve the role of flame retardant.

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