Plastic grades vary from pp to flame retardant formulations-Melamine cyanurate MCA
Different grades of plastics have different pp flame retardant formulations. Different plastic homopolymerization and copolymerization will also lead to different PP flame retardants. Therefore, before purchasing flame retardants, you must first understand the nature of your own base materials. In order to purchase a better flame retardant.
PP flame retardant, the content in the flame retardant masterbatch can be from 20-80%, according to the type of flame retardant and the proportion of PP flame retardant masterbatch, can adjust the formula! Generally, PP flame retardant can be added 2%, PP flame retardant masterbatch can be added 3-4%.Melamine cyanurate MCA
Both the homopolymer type and the copolymer type PP materials have excellent moisture absorption resistance, acid and alkali corrosion resistance, and solubility resistance. However, it is not resistant to aromatic hydrocarbons such as benzene solvents, chlorinated hydrocarbon solvents, and the like. PP does not have oxidation resistance at high temperatures like PE.
Differences between homopolymerized PP and copolymerized PP
Since the PP temperature of the homopolymer type is very brittle above 0 °C, many commercial PP materials are random copolymers incorporating 1-4% ethylene or clamp copolymers of higher ratio ethylene content.
The copolymer type PP material has a low heat distortion temperature (100 ° C), low transparency, low gloss, low rigidity, but has a stronger impact strength. The strength of PP increases as the ethylene content increases. The Vicat softening temperature of PP is 150 °C. Due to the high degree of crystallinity, this material has excellent surface stiffness and scratch resistance. There is no environmental stress cracking problem in PP.