Modified plastics belong to the category of new materials and are listed as key scientific and technological fields by the state. Due to the deficiencies of plastics in terms of heat resistance and load, various properties of plastics can be improved by adding appropriate modifiers, filling, blending, and reinforcing methods. The modified plastic obtained by processing overcomes the defects of poor heat resistance, low strength and toughness, and weak abrasion resistance and impact resistance of ordinary plastics, and improves the properties of flame retardancy, strength, impact resistance, toughness and other aspects.

Modified plastics are divided into flame retardant resins, reinforced and toughened resins, plastic alloys, functional masterbatches and other products according to their properties. They are used in power tools, auto parts, household appliances, electronic appliances, furniture and other products. industrial products. The overall modified plastic downstream industry has a wide range of applications and is still expanding.

Although there are thousands of enterprises engaged in the production of modified plastics in my country, there are only more than 70 large-scale enterprises (with a production capacity of more than 3,000 tons), and the industry concentration is low. High-end modified plastics, especially high-end modified engineering plastics, still need to be imported, mainly from DuPont , BASF, Lanxess and other foreign capitals occupy the market share of domestic enterprises is only 30%.

With the rapid development of my country's economy and the continuous advancement of "replacing steel with plastic" and "replacing wood with plastic", the modification equipment and technology have continued to mature, and the modified plastics industrial system has also been continuously improved, which has greatly promoted the upgrading and development of the plastics processing industry. . In recent years, the domestic modified plastics market has grown rapidly. From 2010 to 2019, my country's modified plastics output increased from 7.05 million tons to 19.55 million tons. It is expected to exceed 20 million tons in 2020, accounting for 20.4% of domestic plastics output. In particular, the raw material prices of modified plastics have shown a downward trend in recent years, and the profits of the industrial chain will be transferred to the plastic processing link, which will help improve the overall profitability of the modified plastics industry, thus attracting a large number of enterprises to enter the modified plastics market.

At present, there are more than 1,000 companies engaged in modified plastic-related business in China, but most of them are small in scale, and their products are generally homogeneous, mainly for the low-end market. The foreign-funded multinational enterprises are more advanced in technology research and development and have larger production capacity, and their products are mainly aimed at mid-to-high-end automobiles and key auto parts.

From the perspective of domestic modified plastic production capacity, domestic enterprises account for 75.3%, and foreign or joint ventures account for about 24.7%. Large-scale modified plastics manufacturers in China include Kingfa Technology, Plitte, China Xinda, Silver Age Technology, Guoen Co., Ltd., Dawn Co., Ltd., Nanjing Julong, etc. Among them, Kingfa Technology is the largest domestic modified plastics production company. In 2019, the output was 1.289 million tons, accounting for about 7.7% of the domestic market share. In addition, despite the rapid development of modified plastics in my country, the production capacity is mainly concentrated in the field of general products, and the production capacity of high-end products is relatively low.

The variety and quality of my country's basic resins cannot meet the development requirements of the modified plastics industry, and some special resin varieties and high-performance modifiers still rely heavily on imports.

1. Application fields of plastic modification

Modified plastics have been widely used in downstream fields due to their high cost performance. Commonly used in the field of home appliances, automobiles, battery cases, electronic products, sports fields, etc.

1. Application of modified plastics in the field of household appliances

Modified plastics are widely used in the home appliance industry. Home appliances are prone to frequent contact and wear during use; long-term contact with water, oil, and salt is easy to corrode; long-term use at high temperature is easy to age; , loss of luster and a series of problems, so the material is required to have strong appearance, good scratch resistance, easy processing, and high cost performance.

Common household appliances include electric pressure cooker, induction cooker, noodle maker, steamed bread maker, soybean milk maker, cooking machine, juicer, boiling water cooker, hair dryer, hair straightener, razor, etc., which all use modified plastics .

Commonly used are modified PBT, modified PET, modified PA, modified PPO, etc., as well as modified PP, ABS, PC/ABS, etc. for exterior shells.

2. Application of modified plastics in the automotive field

The applications of modified plastics in automobiles include: pedals, sun visors, racks, fans, wipers, air conditioning shells, bumpers, belt clips and other automotive interiors, automotive exteriors, automotive engine peripherals, air conditioning systems and lighting systems, etc. .

These are the application areas of modified plastics. It can be seen that it is widely used in the automotive field. By increasing the amount of modified plastics used in automobiles, the weight of the automobile can be reduced, the cost can be controlled, and the effect of energy saving can be achieved.

3. Application of modified plastics in sports field

Sports equipment and sporting goods have to adapt to different indoor and outdoor environments, and also need to give athletes comprehensive protection in terms of strength, toughness, force, wear resistance, etc. according to different sports. ,

Therefore, sports equipment materials generally need to have high temperature resistance, low temperature resistance, impact resistance and other properties. Commonly used materials are modified PA, modified PP, modified PC, etc.

2. The increasing demand for import substitution

The modified plastics industry has been developing for many years in many developed countries. Large international chemical companies such as BASF, Dow, DuPont, SABIC, etc. have obvious advantages in raw material supply, business scale and technology accumulation. Its formula research and development, processing and manufacturing, brand quality and other aspects are in a leading position, and its products are widely used in high-end fields.

In contrast, most of the domestic modified plastics enterprises started to emerge after the development of the domestic home appliance and automobile industries. Although the development speed has been rapid in recent years, there is still a certain gap between the comprehensive competitiveness and the international large-scale chemical enterprises. The high-end modified plastic market is still dominated by imports, and there is a large demand for import substitution.

As large-scale domestic enterprises in the industry have continued to increase investment in research and development in recent years, the technological gap with large international enterprises has gradually narrowed. Some enterprises have gradually penetrated into the high-end market by researching and developing functional and high-performance products. On the other hand, in recent years, with the continuous strengthening of independent research and development of products by upstream petrochemical enterprises in my country, the overall innovation speed of the domestic modified plastics industry has also accelerated.

With the continuous promotion of economic transformation and industrial upgrading in my country in recent years, the demand for import substitution of mid-to-high-end modified plastics has become more and more urgent, providing a good development opportunity for leading domestic enterprises with strong technical strength.