Plastic flame retardant technology
Polymer flame retardant technology is divided into two kinds of additive and reactive way, and in the so-called "plastic" concept, mainly to add the main type. That is, in the ordinary particles to add matching flame retardant, in the mixer fully mixed, and then into the twin-screw extruder-based mixing device to re-granulation, prepared flame retardant modified "flame-retardant plastic " PVC, PS, HIPS, ABS, polyamide, PC, PBT, PET, unsaturated polyester, PU and epoxy resin commonly used in thermoplastic general plastics, thermoplastic engineering plastics and thermosetting plastics are the following. Brief introduction of fuel technology.
flame retardant manufacturers to share flame retardant polypropylene
① halogen - antimony system, that is, gas phase flame retardant mechanism. Commonly used halogen flame retardant is decabromodiphenyl ether, hexabromocyclododecane, octabromo ether, tetrabromobisphenol A, etc., coupled with flame retardant synergist antimony trioxide, with less added, resistance Burning effect of good features. But halogen-based flame retardants have been subject to green environmental protection, as well as in some countries have been restricted, was banned the use.
However, the United States, Japan and other countries are still allowed to use, then as a developing country in China, halogen flame retardant life of at least 10 years.
② with bromine alkyl phosphate to deal with PP. This kind of flame retardant has the P-Br synergistic effect, so that the flame retardant effect is remarkable, but also can improve the rheology and processing performance of PP, PP physical-mechanical properties are also small.
③ over the past decade in the PP flame retardant technology to Italy Turin University Professor Camino first expansion of the flame retardant has played a huge role in this type of PN flame retardant with high efficiency, heat and light stability, low toxicity, Low smoke, low corrosion, little impact on processing and mechanical properties, will not cause environmental pollution. In the PP as long as 2530 to add UL94V-0 level. China has just intumescent flame retardant products production reports.
④ pentachlorobenzyl acrylate and EPDM graft copolymer flame retardant polypropylene. This type of flame retardant PP has a high impact strength, in some cases can be used as engineering plastics.
⑤ inorganic filler flame retardant polypropylene
The so-called inorganic filler refers to aluminum hydroxide and magnesium hydroxide, they have a flame retardant, smoke suppression role. But to achieve the desired effect, micronization and surface treatment is the key technology, used in different plastics. To carefully select the matching surfactant, so that it is compatible with the plastic, and in the plastic to be evenly dispersed, and not too much impact on the mechanical properties of plastic.