Plastic products play an important role in daily life and industrial production. To have a deeper understanding of plastic products, we must first understand their raw material composition. The raw materials of plastic products are mainly synthetic resins, which are a type of artificially synthesized polymers. They are the main components of plastics and determine the basic properties of plastics. Common synthetic resins include polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS) and acrylonitrile-butadiene-styrene copolymer (ABS).

Polyethylene is one of the most widely used plastics with the largest output. According to the polymerization method and molecular structure, it can be divided into high-density polyethylene (HDPE), low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE). High-density polyethylene has high hardness and strength and is often used to make pipes, injection molded products, etc.; low-density polyethylene has good flexibility and transparency and is mostly used to produce films, plastic bags, etc. Polypropylene has the advantages of light weight, good rigidity, and chemical corrosion resistance. It is widely used in automotive parts, home appliance housings, fibers and other fields. Polyvinyl chloride is a general-purpose plastic with flame retardant, wear resistance, acid and alkali resistance, etc. It is often used to make pipes, wire and cable insulation layers, artificial leather, etc. Polystyrene is a colorless and transparent thermoplastic with good insulation, light transmittance and processing performance. It is often used to make optical instruments, stationery, toys, etc. Acrylonitrile-butadiene-styrene copolymer has good comprehensive properties, such as high impact resistance, heat resistance, chemical corrosion resistance, etc., and is widely used in electronic appliances, automobiles, building materials and other industries.

In addition to synthetic resins, various additives are added to improve the performance of plastics, such as plasticizers, stabilizers, lubricants, flame retardants, colorants, etc. Plasticizers can increase the flexibility and plasticity of plastics; stabilizers can prevent plastics from aging and degradation during processing and use; lubricants can improve the processing performance of plastics and reduce mold wear; flame retardants can improve the flame retardant properties of plastics and reduce fire risks; colorants can give plastics various colors to meet different usage requirements.

With the increasing awareness of environmental protection and the concept of sustainable development, promoting the sustainable development of the plastic products industry has become an important issue in the industry. The following are some effective ways to promote the sustainable development of the plastic products industry.

In terms of raw materials, the research and development and application of degradable plastics can be strengthened. Degradable plastics can be decomposed into harmless substances in the natural environment within a certain period of time, reducing pollution to the environment. At present, common degradable plastics include polylactic acid (PLA), polybutylene adipate/terephthalate (PBAT), polybutylene succinate (PBS), etc. The government can encourage enterprises to increase investment in the research and development of degradable plastics and improve the production scale and quality of degradable plastics through policy guidance and financial support.

During the production process, enterprises should adopt advanced production technology and equipment to improve production efficiency and reduce energy consumption and waste emissions. For example, adopt high-efficiency molding technologies such as injection molding and extrusion molding to reduce waste generation during plastic processing; promote the use of energy-saving equipment and processes to reduce energy consumption. At the same time, strengthen the management and monitoring of the production process to ensure that the production process meets environmental protection requirements.

Establishing a sound plastics recycling system is also key to promoting the sustainable development of the industry. The government can formulate relevant policies to encourage enterprises and social organizations to participate in the recycling of plastics. The recycling rate of plastics can be increased by establishing recycling sites and carrying out recycling publicity activities. Enterprises can reprocess recycled plastics to produce recycled plastics and realize the recycling of resources.

The following is a comparison table of several common plastic raw materials, their characteristics and application areas:

To achieve sustainable development, the plastic products industry needs to start from multiple links such as raw materials, production, and recycling, and promote the industry to develop in a green, environmentally friendly, and sustainable direction through various means such as technological innovation, policy guidance, and social participation.