Modified plastics, refers to the general plastics and engineering plastics, on the basis of after filling, blending, and enhance processing and modification, to improve the flame retardancy, strength, impact resistance and toughness properties of plastic products.Modified plastic products main species have flame retardant resin, enhanced toughening resin, plastic alloy, functional masterbatch, etc.Through the modification of the plastic parts can not only reach the strength performance of some steel products, have qualitative light, colorful, easy to shape and a series of advantages, so the trend of "plastic instead of steel" appeared in many industries, and at this stage to find out a large-scale alternative plastic material is almost impossible.

　　Modified plastics industry in our country the development of the overall level is low, small scale of enterprises in the industry production, the product market situation also presents the primary products, intermediate products quality is not stable, the characteristics of the lack of advanced products, far cannot meet the needs of the 21st century economic development in our country.Modified plastics, therefore, as the chemical industry is an important part in the field of new materials, has been one of the focus on the development of science and technology fields listed by the state.Since 2007, our country developed policies to promote development of modified plastics industry.Modified plastics is a wide range, high technology content, to create a huge economic benefit of plastic industry.And reinforced plastics modification technology, filling, blend and more in-depth almost all of the raw materials and the forming process of plastic products.From the raw material of resin production and from a variety of specifications and varieties of modified plastic masterbatch, in order to reduce the cost of plastic products, improve its functionality, without plastic modification technology.Ordinary plastic tend to have its own features and defects of modified plastics is to change the properties of the basic techniques include:1, enhance: such as glass fiber and plastic blending in order to increase plastic mechanical strength.2, filling, blending, such as mineral filler and plastic to make plastic shrinkage rate, hardness, strength, etc.3, toughening, through to the general plastics toughening agent blend in order to improve the toughness of the plastic, the toughening modification of products: track pads.4, flame retardant, flame retardant for ordinary plastic resin to add, can make the plastic with flame retardant properties, flame retardant can be one or several kinds of flame retardants of complex system, such as bromine + antimony, phosphorus, nitrogen, silicone, and other inorganic flame retardant systems.5 and hardy: increase the strength and toughness of plastic in low temperature, general plastic inherent in the low temperature low temperature brittleness, make limited application in low temperature environment, need to add some resistance to low temperature flexibilizer change plastic brittle at low temperatures, such as bumper and other plastic parts, general requirements to cold.Although domestic modified plastics industry although there are many shortcomings, but some of the technologies and products has reached international advanced level.China on the r&d and production of modified additives, additives have made significant progress.Coupling agent, antistatic agent, flame retardant and other basic can satisfy the use requirement, individual manufacturer for the pursuit of profit is the main deficiency, malicious changing product ingredients, cause the loss of quality, function is not stable;Rare earth coupling agent, nucleating agent, because China has the resources advantage, such as water magnesium powder in a leading position in the world.