Plastic and rubber products have a wide range of products and a large market capacity. They are a new growth point for China's economic development and a key industry in the national economy. Data show that in 2019, the revenue of rubber and plastic products accounted for 2.4% of the revenue of industrial enterprises in the country, ranking 14th, higher than the basic industries and major industries of the country such as coal mining and washing and pharmaceutical manufacturing.The output of plastic products in China increased from 54.744 million tons in 2011 to 81.842 million tons in 2019, with a compound annual growth rate of 5.2%.

　　Data show that the main business income of Chinese plastic products enterprises above designated size has increased from 1,558.374 billion yuan in 2011 to 1,907.748 billion yuan in 2019, with an average annual compound growth rate of 2.6%.With the ever-accelerating development trends of various terminal industrial products such as light weight, customization, intelligence, and environmental protection, the application scope of plastic products will also continue to expand.The performance and quality requirements of products are also rapidly increasing, and the transformation and upgrading of the plastic products industry will continue to accelerate.
 
　　The ratio of plastic to steel in China is lower than the ratio of plastic to steel in the world and major developed regions. With the rapid development of the domestic economy and the continuous advancement of "plastics instead of steel" and "plastics instead of wood", the modified plastics industry has also achieved rapid development. Modification equipment and technologies continue to mature. Modified plastics The industrial system is gradually improving,It has become an important part of the national plastics industry.In addition, consumption upgrades have led to the rapid development of China's automobile, home appliances, construction and other industries, and people have continuously improved material performance requirements. China is becoming the world's largest potential market and main demand growth driver for modified plastics. In addition, policy guidance such as energy conservation and emission reduction has also greatly promoted the development of the modified plastics industry.
 
　　Analysis of the status quo of the modified plastics industry
　　Modified plastics are currently widely used in home appliances, automobiles, communications, medical, electronic and electrical, rail transit, precision instruments, home building materials, security, aerospace, military and other fields. From 2010 to 2019, my country's modified plastics also achieved a rapid increase, from the 2010 annual output of 7.05 million tons,By 2019, the annual output is about 19.55 million tons; the modification rate has increased from 16.2% in 2010 to 20.4% in 2019.
 
　　Modified plastics are widely used downstream
　　Plastic is one of the three major polymer compounds,It is formed by the polymerization of various resins formed by the petrochemical industry through addition polymerization or condensation polymerization.With the characteristics of light weight, high strength, insulation, light transmission, and wear resistance, it is currently widely used in various production activities in human society.
　　With the characteristics of light weight, high strength, insulation, light transmission, and wear resistance, plastics are currently widely used in various production activities in human society and have a wide range of downstream applications. However, the plastic itself has poor heat resistance, a large coefficient of thermal expansion, and is easy to burn; it has poor low temperature resistance,It becomes brittle at low temperature; it is prone to aging problems under the action of the atmosphere, sunlight, long-term pressure or certain media. The above shortcomings limit the further wide application of plastics.
        　　Therefore, in some industries or usage scenarios that require high material performance, plastics need to be modified to meet the performance requirements. Plastic modification is based on general plastics, engineering plastics or special engineering plastics,Add appropriate additives, fillers or other polymer ingredients, and process and modify them through filling, toughening, reinforcement and other means to improve the performance of plastic materials in certain aspects.The plastic processed by the above modification technology is called modified plastic. Generally speaking, modified plastics are better than plastics in terms of flame retardancy, strength, impact resistance, and aging resistance. The main plastic modification methods are as follows:

　　The upstream of polymer modified materials is the petrochemical industry, the upstream raw materials are generally various synthetic resins and various additives and modified filling materials, etc., and the downstream mainly covers home appliances, automobiles, communications, electronic and electrical, medical, rail transit, and precision instruments. , Home building materials, security, aerospace, military and other fields.
        　　There is a certain overlap in the application industry of modified plastics and plastics. Customers choose suitable materials according to the specific requirements of different products or components: When the material performance requirements are relatively single and the conventional plastics can meet the requirements, customers usually use standardized Conventional plastics; when conventional plastics cannot meet customer customization requirements due to insufficient performance in certain aspects,Or when customers seek to reduce the cost of using conventional engineering plastics or special engineering plastics, they need to use modified plastics to meet the requirements.

　　Don't be dominant. In industries such as daily necessities and product packaging, unmodified plastics are currently mainly used as raw materials; while in areas with complex usage scenarios and high material performance requirements such as automobiles, electronic and electrical, and communications, most conventional plastic varieties cannot Directly used in the manufacture of products, modified plastics are widely used.  
 
　　The plastic modification rate continues to increase
　　Modified plastics first originated in foreign countries. The development of modified plastics in my country began in the 1990s. With the continuous advancement of "plastics to replace steel" and "plastics to wood" and the rapid development of the domestic economy, modified equipment and technology continue Mature, the entire modified plastics industry system is also constantly improving,It has strongly promoted the important transformation of the plastics processing industry from focusing on consumer goods to rapidly entering the field of means of production, which has greatly promoted the upgrading and development of the plastics processing industry.
        　　According to statistics from the National Bureau of Statistics, my country's modified plastics also achieved a rapid increase from 2010 to 2019, from an annual output of 7.05 million tons in 2010 to about 19.55 million tons in 2019; 16.2% in 2010 increased to 20.4% in 2019.
 
　　Automobiles and home appliances are the largest application areas
        　　The home appliance industry is one of the most important downstream industries in the modified plastics industry. Modified plastics have excellent safety, non-toxic, energy saving, environmental protection, antibacterial and anti-mildew properties, and can meet people's needs for lightweight and healthy home appliances. Modified plastic materials are mainly used to manufacture parts such as housings, blades, and exteriors of home appliances. With the rapid economic development and the rapid improvement of people's living standards, the domestic market for home appliances is rapidly expanding. In addition,The export of my country's home appliance industry continues to grow, and its status in the global home appliance industry continues to improve, and it has become one of my country's highly globalized industries.The domestic and foreign market demand promotes the vigorous development of my country's home appliance market, and at the same time brings the rapid growth of the upstream modified plastic industry demand. The use of modified plastics in the field of home appliances in my country has increased from 3.6 million tons in 2015 to 4.6 million tons in 2019, maintaining continuous growth.

　　Modified plastics are widely used in the automotive industry and have a long history. With the development of the automotive industry, people’s requirements for lightweight, energy-saving, and environmental protection of automotive materials are increasing. Modified plastic materials are used in automotive interiors, exteriors, and electronics due to their low density, high strength, and good molding process performance. Various aspects such as electrical and powertrain have been widely used.
        In recent years, the demand for modified plastic materials in the automotive sector in my country has risen from 3.52 million tons in 2015 to 4.66 million tons in 2019, increasing year by year.With the steady increase in automobile production and sales and the development of automobile lightweight trends, it is expected that the demand for modified materials in the automobile sector will maintain a good upward momentum.In the future, the development of my country's modified plastics industry will show the following trends:
 
　　Strong national policy support
        　　Polymer modified materials are an important branch in the field of new materials, a key scientific and technological field for my country's development, and an important part of the strategy of manufacturing a powerful country and an innovation-driven development strategy.In recent years, the competent government departments have issued a series of industrial policies to encourage the development of the polymer modified materials industry.The State Council’s "Thirteenth Five-Year" National Strategic Emerging Industry Development Plan proposes to comply with the development trend of high-performance, multi-functional and green new materials, promote the sustainable development of characteristic resources and new materials, strengthen the layout of cutting-edge materials, and use strategic Guided by the needs of emerging industries and major projects, optimize the industrialization and application environment of new materials, strengthen the construction of new material standard systems, improve the application level of new materials, and promote the integration of new materials into the high-end manufacturing supply chain. Therefore, polymer modified materials, as a key industry encouraged and developed by the country, have been supported by a number of national industrial policies in recent years, which is conducive to the overall development of the industry.
 
　　Downstream applications continue to expand
        　　Modified plastics are an important branch of polymer modified materials. Modified plastics are currently widely used in home appliances, automobiles, communications, electronic and electrical, medical, rail transit, precision instruments, home building materials, security, aerospace, military and many other national pillars Sex industry and emerging industries, of which household appliances and automobiles are currently the most important downstream application industries of modified plastics. In addition, modified plastics have been increasingly used in various fields of society due to their light weight, corrosion resistance, flame retardancy, heat resistance, insulation and other properties. In the field of health protection, modified plastics can be used in food packaging, medical protection and other scenarios; in the field of rail transit, modified plastics can be used in interior and exterior decoration, structural parts and cushioning materials; in the field of home building materials,Modified plastics are also an important part of products such as sanitation luggage, power tools, and security equipment; in aerospace, military industry and other fields, modified plastics also have a wide range of applications.
 
　　Increased import substitution demand
        　　The modified plastics industry has many years of development history 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. Is in a leading position in terms of formula R&D, processing and manufacturing, brand quality, etc.Products are widely used in high-end fields.In contrast, most domestic modified plastics companies began to rise after the development of the domestic home appliance and automobile industries. Although they have developed rapidly in recent years, their overall competitiveness still lags behind that of large international chemical companies. The high-end modified plastics market is still dominated by imports, and there is a large demand for import substitution.

　　In recent years, large-scale domestic enterprises in the industry have continuously increased R&D investment, and 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, as my country’s upstream petrochemical companies continue to strengthen independent research and development of products,It also drives the overall innovation speed of the domestic modified plastics industry to accelerate. As my country has continued to promote economic transformation and industrial upgrading in recent years,The import substitution demand of high-end modified plastics is becoming more and more urgent, providing a good development opportunity for leading domestic enterprises with strong technical strength.