Modified plastic is a primary form of resin as the main component, to improve resin mechanics, rheology, combustibility, electricity, heat, light, magnetism and other aspects of the performance of additives or other resins as auxiliary components, through filling, toughening, strengthening, blending, alloying and other technical means, to obtain a uniform appearance of the material.
Modified plastic market scale
modified plastics, as an important part in the field of new chemical materials, has also been listed as one of the key scientific and technological fields in the country. From 2018 to 2020, the market size of China's modified plastics increased from 225 billion yuan to 293.5 billion yuan, with a compound annual growth rate of 14.21%. The market size of modified plastics may reach 415.2 billion yuan in 2022.
Modified plastics are mainly subdivided
of
1. Flame retardant resinsFlame retardant resin flame retardant plastic products can greatly reduce the risk of fire when short circuit, overload, water immersion, etc.
2. Reinforced and toughened resins
and toughening resins are mainly divided into weather-resistant and toughening PP special materials, glass fiber reinforced thermoplastics and other products.
1) Weather-resistant and toughened PP special material
Weather-resistant and toughening PP special material is a new polypropylene material with engineering plastic characteristics. It has the advantages of good low-temperature toughness, small molding shrinkage, high rigidity, strong weather resistance, etc. It is mainly used in outdoor environments requiring weather resistance and ultraviolet rays. Its main consumer groups include home appliance enterprises, auto parts enterprises, etc.
2) Glass fiber reinforced thermoplastics
products mainly include glass fiber reinforced AS/ABS, glass fiber reinforced PP, glass fiber reinforced nylon, glass fiber reinforced PBT/PET, glass fiber reinforced PC, glass fiber reinforced PPE/PPS, etc. Its main consumer groups include computer accessories enterprises, mechanical parts enterprises, electric tools enterprises, lamp enterprises, etc.
3. Plastic alloys
, plastic alloys are mainly divided into PC alloys, PVC alloys and polyester alloys.
1)PC alloy
has the characteristics of high impact strength, creep resistance, heat resistance, low water absorption, non-toxicity, excellent dielectric properties, etc. Mainly used in automotive instrument panels, computers and office automation equipment, power tool housings, cellular phones, etc.
2)PVC/ABS alloy
the is produced by using PVC and ABS as matrix and adding various modifiers such as toughening agent, lubricant, stabilizer, flame retardant, etc. It has excellent mechanical properties, weather resistance, processing rheological properties, good surface gloss of the product, good injection molding and extrusion effects, and is an alloy material with excellent cost performance. It can mainly replace flame retardant and weather resistant ABS, PC, etc., and is applied to household appliance housings, electrical switches, ammeter housings, lighting materials, communication networks, building materials, etc.
3) polyester alloy
has excellent mechanical properties (fatigue resistance), dimensional stability, chemical resistance and environmental stress cracking resistance. Mainly used in automobiles, household appliances, electric tools and other fields.
output of modified plastics
After years of rapid development, China's modified plastics industry has shown an upward trend in output and market size. From 2016 to 2020, China's production of modified plastics increased from 15.63 million tons to 22.5 million tons, with a compound annual growth rate of 9.54%. The output of modified plastics will reach 28.84 million tons in 2022. Although the domestic plastic industry is developing rapidly, the scale of plastic application in China is still small. China's plastic modification rate (I. e., the proportion of modified plastic production to total plastic production) has increased steadily. The global plastic modification rate is nearly 50%, and the plastic modification rate in China has increased from 16.3% in 2011 to 21.7% in 2020, compared with the global level, there is still a lot of room for improvement.
1. High performance and low cost
Due to the development of modification technology, some general-purpose plastics can improve their original properties through modification technology, and their heat resistance and mechanical strength have been significantly improved, thus having certain engineering plastics properties and greatly expanding their application fields. For engineering plastics, due to the continuous improvement of raw material performance requirements in domestic automotive, electronic and electrical industries, the original engineering plastics can no longer fully meet the requirements of the downstream market. Engineering plastics have been modified, and various physical indicators are more excellent to more stringent. Performance to meet market demand. High-performance special engineering plastics can be used in cutting-edge technology fields such as electronics, automobiles, and aerospace due to their high temperature resistance, good performance, and dimensional stability, but the market capacity of cutting-edge products is small. In order to further expand the application field of modified special engineering plastics, it is necessary to adopt a low-cost route and use a lower cost to expand the market.
2. Downstream applications continue to expand
Modified plastics are widely used in automobiles, communications, electronic appliances, new energy batteries, home appliances, medical care, rail transit, precision instruments, home building materials, security, aerospace, military industry and many other national pillar industries and emerging industries. Among them, home appliances and automobiles are currently modified plastics The most important downstream application industries.In addition, modified plastics have been increasingly used in various fields of society due to their lightweight, 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 decorations, structural parts and cushioning materials; in the field of home building materials, modified plastics are also An important part of electric tools, security equipment and other products; in aerospace, military and other fields, modified plastics also have a wide range of applications.
3. Increased import substitution demand
domestic modified plastics companies mostly began to rise after the development of the domestic home appliance and automobile industries after the 1990 s. 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 companies. The domestic high-end modified plastics market is still dominated by imports, and there is a large demand for import substitution. With the continuous increase of R & D investment by large-scale domestic enterprises in the industry in recent years, the technology gap with large international enterprises has gradually narrowed, and some enterprises have gradually penetrated into the high-end market with research and development of functional and high-performance products.
On the other hand, in recent years, as my country's upstream petrochemical companies continue to strengthen the independent research and development of products, it has also accelerated the overall innovation of the domestic modified plastics industry. As China continues to promote economic transformation and industrial upgrading in recent years, the demand for import substitution of high-end modified plastics is becoming more and more urgent, which provides a good development opportunity for domestic leading enterprises with strong technical strength.
Source: All Plastics Association, New Materials Research Society * Disclaimer: The content contained in the content comes from public channels such as the Internet and WeChat public numbers. We maintain a neutral attitude towards the views in the text. This article is for reference only. The copyright of the reprinted manuscript belongs to the original author and organization. If there is infringement, please contact Huayi Tianxia customer service to delete it. * Disclaimer: The content contained in the content comes from public channels such as the Internet and WeChat public numbers. We maintain a neutral attitude towards the views in the text. This article is for reference only. The copyright of the reprinted manuscript belongs to the original author and organization. If there is infringement, please contact Huayi Tianxia customer service to delete it.
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