PP flame retardant material is a specially treated polypropylene (PP) material, which improves its flame retardant performance by adding flame retardantsThis material is widely used in electronic appliances, home appliances, automobiles and other industries, because it has the advantages of low density, good rigidity, high strength, chemical resistance, etc., and excellent processing performanceThe flame retardant mechanism of PP flame retardant materials is mainly achieved in two ways: one is through the addition of flame retardants, such as intumescent flame retardants, which insulate the air by producing a dense expanded carbon layer, so as to achieve the purpose of flame retardant; The second is through the addition of halogen-antimony system polypropylene and other treatment methods, this method through phosphorus and nitrogen-containing chemicals polymerization of flame retardant, in the combustion process by producing a dense expanded carbon layer to achieve the purpose of heat insulation and air flame retardant, while will not produce irritating hydrogen halide gas and black smoke, is an environmentally friendly flame retardantThe development and application of PP flame retardant materials has effectively solved the problem of flammability of PP materials and expanded its application range in various fields.
Differentiation of PP flame retardant materials
- The main difference between PP flame retardant materials is whether flame retardants are added or not
- The difference between PP flame retardant material and ordinary PP material is that flame retardant PP material is added in the production process, and these flame retardants are usually composed of bromine, oxygen, phosphorus, titanium, aluminum and other elements, which are designed to provide fire and flame retardant functionsThe presence of flame retardant makes the flame retardant PP material inhibit the open flame combustion and slow down the spread of the fire when it encounters the fire source, so as to achieve the purpose of fire controlThis material has been widely used in building materials, electronic appliances and other fields, because it can significantly improve the fire safety of products
- In addition, the flame retardant effect of PP flame retardant material not only depends on the type of flame retardant added, but also affects the proportion of flame retardant addedDifferent flame retardants have different properties and costs, and the selection of suitable flame retardant PP materials needs to consider their performance and cost and other factorsFor example, the fire resistance grade of PP flame retardant board is usually B1 grade, and some can reach A2 grade, depending on its production process and the amount of flame retardant addedThe addition of flame retardant will also affect the mechanical properties and melt index of PP materials, so it is necessary to weigh their fire performance and possible environmental impact when using flame retardant PP materials
- To sum up, the difference between PP flame retardant materials and ordinary PP materials lies in whether flame retardants are added, as well as the type and amount of these flame retardants, which together determine the fire performance and safety level of the material
PP air duct flame retardant grade classification
The flame retardant grades of PP air ducts mainly include A, B1, B2 and B3
- Grade A: Indicates non-combustible material, barely combustible
- B1 grade: It is a flame-retardant material, with a good flame retardant effect, it is not easy to spread quickly in case of fire, and it can be extinguished by itself after leaving the fire source
- Class B2: It is a combustible material with a certain flame retardant effect, but it is still a flammable material
- Class B3: It is a flammable material, has no flame retardant effect, and is extremely flammable.
- PP flame retardant ducts should generally achieve a fire rating of at least B1 to ensure that the spread of fire can be slowed down in the event of a fire, providing more time for personnel evacuation and extinguishing the fire.In addition, for the fire rating of plastics, there is also the UL-94 flame retardant plastic standard, in which the flame retardant grade is divided into HB, V2, V1, V0, 5VB, 5VA, etc., these grades are divided according to different test standards to divide the flame retardant performance of materials.For example, a V0 rating indicates that the material has high flame retardant properties, and the flame is extinguished within 30 seconds after two 10-second burn tests, and no combustibles can fallThe V2 rating indicates that the material has certain flame retardant properties, and after two 10-second burn tests, the flame is extinguished within 60 seconds, and some combustibles can fall.
- To sum up, the flame retardant grade classification of PP air duct not only considers the combustion characteristics of the material, but also covers the detailed definition and test standards of different grades to ensure that the material can play an effective flame retardant role under specific conditions
