Modified plastics, refers to the use of filler, enhancement, and blending method was carried out on the general plastics and engineering plastics processing, on the mechanical properties, toughness and flame retardant performance of plastic products. After modification of plastics will have some steel strength, have qualitative light, colorful, easy to shape and a series of advantages. So now 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. Modification technology in plastics processing equipment, development of mature today, modified plastics industry in China has been gradually perfected. Modified plastics industry development in our country present three marked characteristics.
General engineering plastics. Modified plastics has the excellent performance, in many areas has not replace the status, but one thing have to face, the modified plastics not only in the aspect of market prices far higher than that of the general plastics, and in the aspect of production is far lower than general plastic production. Is that still in modified plastics to expand production and reduce cost under the premise of contrast. That is to say, with the development of the modified equipment, the progress of modification technology, general plastics such as polypropylene (PP), acrylonitrile - butadiene - styrene block copolymer (ABS) by modified improved strength, heat resistance and other performance indicators, has some characteristics of the engineering plastics, but the price has significant advantages, therefore able to capture part of the application of traditional engineering plastics market.
High-performance engineering plastics. Along with the development of the industry in our country, especially in the automotive, electrical and electronic, mechanical industry, people began to continuously improve to material performance requirement, therefore the existing varieties of engineering plastics, such as the polycarbonate (PC), nylon (PA), polyester (PBT and PET), polyphenylene oxide (PPO) and so on, can no longer meet the market requirements. Causing developers to develop higher performance engineering plastics, such as used for energy-saving lamp base plastic requirements of high temperature resistant, resistant to yellowing, used for plastic chip tray for flexural resistance, antistatic, used for plastic requirements of electronic connectors high flame retardant, high heat resistance, high flow, used for plastic requirements of mechanical gear abrasion resistance, high rigidity, high dimensional stability, etc.
The special engineering plastics of low cost. Special engineering plastics, is refers to under the condition of 150 ℃ above can use for a long time of engineering plastics, such as PPS (PPS), polyimide (PIM), polyether ether ketone (PEEK) and polysulfone (PSF), and other special engineering plastics. Special engineering plastics generally have good electrical character of high temperature and stable dimension, some still has the very good flame retardant, resistance to radiation, chemical resistance and mechanical properties, therefore, it is widely used in high-tech, military and aerospace, aviation and other industries. But one thing is that the market price of the special engineering plastics are often several times the price of general engineering plastics, can accept in the military products, used in civil products, you need to keep its high performance, and relatively low price.