HIPS is the English abbreviation for impact resistant polystyrene resin, the main raw material is styrene, with high rigidity, high impact resistance, dimensional stability, easy to shape and process and many other characteristics, can be widely used in home appliances, instruments and instruments, toys, disposable packaging, construction field. The impact resistance of styrene is poor, and its products are brittle and easily broken by collision. Adding styrene butadiene rubber particles to styrene can effectively improve its impact resistance, and the commonly used butadiene rubber particles are butadiene, which has excellent impact resistance.

There are currently two methods of preparing impact-resistant polystyrene, namely the blending method and the graft copolymerisation method. Blending method, first of all, butadiene and styrene mixture in proportion to the mix, then the mixture into the extruder blended evenly, extruded thin film cooling, and finally cut into HIPS slices with a shear, the process should pay special attention to the mixture is blended evenly.

In the graft copolymerisation method, butadiene particles are dissolved in styrene monomer, and the copolymerisation reaction occurs with the aid of a catalyst peroxide, and the copolymerisation product is finally put into the extruder for granulation. In practice, HIP plastic often and ABS resin for complementary materials, HIPS material is cheaper than ABS resin, but the mechanical properties are lower than ABS resin, the construction industry will be based on the price of both the market for procurement, so HIPS plastic prices fluctuate with the price of ABS, if ABS prices are high, it will drive the HIPS market demand, of course, the impact of HIPS Plastic prices are the main factor is styrene material, the current supply of styrene remains stable, the downstream demand is general, the price is stable finishing. In the long run, this year’s polypropylene production capacity is limited, and next year’s device production is expected to be delayed, the overall view, the supply of goods is still not sufficient, but the last two years the incremental downstream demand slowed down, the overall view, the market is expected to move up, but more stable. This shows that the cost side lacks a good drive. In the past two years, China’s home appliance market demand began to slowly decline, but based on big data, artificial intelligence technology, the forward market may usher in a wave of tide season, which will effectively drive the raw material market demand, short-term demand side is difficult to have a large improvement, so the demand side is negative.