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The process of full flame retardant PVC modified engineering plastics is as follows:

　　1. Prepare the required raw materials according to the formula;

　　2. Add PVC resin and stabilizer into the high-speed mixer for mixing and heating to about 60, then add fillers and lubricants to heat to 80, then add processing aids and impact modifiers, continue heating to 115120, and then unload them into the low-speed mixer. When the temperature drops to 4060, the materials are discharged and ready for use;

　　3. The materials to be used are added to the extruder, the temperature of the electronic regulator is set to 85, 160, 150, 135 (5), and after the resin comes out of the die, the pelletizer and fan are started for granulation to obtain the full flame retardant PVC modified engineering plastics.

All flame retardant PVC modified engineering plastics have outstanding advantages:

First, it has persisted PVC has excellent flame retardancy and chemical corrosion resistance, together with excellent mechanical function, heat resistance and other physical properties of flame retardant ABS engineering plastics. In addition, it has good fluidity, simple injection molding, small shrinkage, easy to make products with very small tolerance and high impact resistance. It is an ideal new polymer material to replace flame retardant ABS engineering plastics. It can completely form thin-walled, large-area and disordered parts. Repeated tests show that the apparent and functional indexes of this engineering plastic have reached the indexes of flame retardant V-0 ABS engineering plastic.

Second, the cost of all flame-retardant PVC modified engineering plastics is 2030 lower than that of flame-retardant a.bs engineering plastics commonly used at present.

Third, from the perspective of market demand, ABS used in China mainly relies on imports and is expensive. With the development of domestic chlor alkali industry, the production of general PVC resin has been in a situation of oversupply for many years. The successful development of all flame retardant PVC modified engineering plastics can not only save a lot of foreign exchange for the country, but also find a new way for PVC manufacturers.

Fourth, the chemical corrosion resistance and strong ultraviolet light resistance of all flame-retardant PVC modified engineering plastics are far better than flame-retardant ABS engineering plastics. According to relevant information, the annual consumption of ABS in China is more than 186000 tons, while that in China is only 80000 tons. It is expected that it will increase at a faster rate in the future. During the "Eighth Five Year Plan" period, the state focused on investing in communication work, and it has made explicit provisions that the newly added telecommunication equipment and its terminals, as well as the TV shell above 47cm, must be flame retardant. Therefore, it can be estimated that the promotion value of flame retardant engineering plastics is obvious.

Article source: PVC engineering plastics http://www.latexbbs.com/