Brief introduction of the five most popular engine

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Brief introduction of the five major engineering plastics markets in China

engineering plastics generally refer to plastic materials that can withstand mechanical stress as structural materials and can be used in a wide temperature range and harsh chemical and physical environments. Engineering plastics can be divided into general engineering plastics and special engineering plastics. General engineering plastics usually refer to five kinds of plastics that have been industrialized on a large scale and have a wide range of applications, namely polyamide (nylon, the continuous expansion of national and even global demand, the continuous growth of the number and output of enterprises and the successive introduction of relevant national support policies have created beneficial conditions for the development of wood plastic composite materials in China, PA), polycarbonate (polycarbonate, PC), POM Polyester (mainly PBT) and polyphenylene oxide (PPO). Special engineering plastics refer to some plastics with more excellent and unique properties, but most of them have not been industrialized on a large scale or produced on a small scale with relatively narrow uses, such as polyphenylene sulfide (PPS), polyimide (PI), polysulfone (PSF), polyether ketone (PEK), liquid crystal polymer (LCP), etc

engineering plastics have excellent properties and can replace metals as structural materials, so they are widely used in electronic and electrical, transportation, mechanical equipment, daily necessities and other fields, and play an increasingly significant role in the national economy

development of domestic production

the technical development of engineering plastics in China has a history of nearly 40 years. Although it has a certain technical foundation, there is a great gap with foreign countries in terms of technical level, production capacity and output, and some varieties (such as PPO) are basically blank

in terms of business scale, most of China's engineering plastics enterprises are kiloton production devices or industrial test devices, while the annual production capacity of foreign enterprises is more than 10000 tons. The huge differences in scale and process level make it difficult for domestic engineering plastics to meet the needs of the domestic market, and the product performance and price cannot compete with imported products

characteristics and uses

polyamide (PA) has won people's attention because of its unique low specific gravity, high tensile strength, wear resistance, good self-lubricating property, excellent impact toughness, and rigid and flexible performance. In addition, it is simple to process, high efficiency, light specific gravity (only 1/7 of metal), and can be processed into various products to replace metal, which is widely used in automobile and transportation industry. Typical products include pump impellers, fan blades, valve seats, bushings, bearings, various instrument panels, automotive electrical instruments, cold and hot air conditioning valves and other parts. About 3.6~4 kg of nylon products are consumed by each vehicle. Polyamide accounts for the largest proportion of consumption in the automotive industry, followed by electronics and electrical

although polycarbonate (PC) is a thermoplastic resin, it not only has the strength similar to non-ferrous metals, but also has ductility and strength and toughness. Its impact strength is extremely high. It cannot be damaged by hammering, and can withstand the explosion of TV fluorescent screen. Polycarbonate has excellent transparency and can be colored in any way. Due to the above excellent performance of polycarbonate, it has been widely used in all kinds of safety lampshades, signal lights, transparent protective plates of gymnasiums and stadiums, lighting glass, high-rise building glass, car mirrors, windshield plates, aircraft cabin glass, motorcycle driving helmets. The most used markets are computers, office equipment, automobiles, alternative glass and sheets, and CD and DVD discs are one of the most potential markets

Polyoxymethylene (POM) is known as super steel because of its superior mechanical and chemical properties. Therefore, it can be used as a material that many metal and non-metallic materials cannot do. It is mainly used as various small module gears with high precision, instrument precision parts with complex geometry, tap water and explosion pipeline valves. The use of polyoxymethylene in agricultural sprinkler irrigation machinery in China can save a lot of copper

polybutylene terephthalate (PBT) is a thermoplastic polyester. Compared with other thermoplastic engineering plastics, non reinforced PBT has better processability and electrical properties. The glass transition temperature of PBT is low. When the mold temperature is 50 ℃, it can crystallize rapidly and the processing cycle is short. Polybutylene terephthalate (PBT) is widely used in electronic, electrical and automotive industries. Due to its high insulation and temperature resistance, PBT can be used as flyback transformer of TV, automobile distributor and ignition coil, shell and base of office equipment, various external components of automobile, fan of air conditioner, base of electronic stove and shell of office equipment

polyphenylene oxide (PPO) resin has excellent physical and mechanical properties, heat resistance and electrical insulation, low moisture absorption, high strength and good dimensional stability. Under this condition, the clamp is connected with the part of the tensile machine, and the creep resistance under high temperature is the best of all thermoplastic engineering plastics. It can be applied to small household appliances such as compressor covers of washing machines, vacuum cleaner casings, coffee utensils, hair styling machines, massagers, microwave oven utensils, etc. Modified polyphenylene oxide is also used in TV components, connectors of telex terminal equipment, etc

current situation and prediction of demand

with the rapid development of China's national economy, the demand for engineering plastics in all walks of life in China is growing rapidly, especially in domestic emerging industries, national pillar industries and new growth point industries, such as electronics, automobile, transportation, building materials, oil source system pressure increases with the increase of load, medical devices and human organs, etc, In recent years, the demand for engineering plastics in China has soared. In recent years, the demand for engineering plastics in China has increased rapidly, with an average annual growth rate of 25%, especially PBT, nylon and PPO, whose annual average growth rate has exceeded 25%

according to the changing law of the apparent demand of several engineering plastics in history, combined with the world scale and the latest market trend, the demand of five general engineering plastics is predicted respectively. Because there is no good law to follow for the demand change of PBT resin in history, based on the corrected apparent demand in 1998, and assuming that the future demand development is synchronized with the growth of GDP, the apparent demand in the next few years is predicted. By 2000 and 2005, the apparent consumption of general engineering plastics in China will reach 338000 tons and 528000 tons respectively. The average annual growth rate from 1999 to 2005 was 9.8%. From 2003 to 2004, the apparent consumption of polycarbonate may exceed that of polyamide and become the general engineering plastic with the largest consumption in China. It is estimated that by 2005, the demand for polyamide will be 179000 tons, polycarbonate will be 205000 tons, polyformaldehyde will be 126000 tons, PBT will be 11900 tons, and modified polyphenylene oxide will be 6600 tons

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