The development of polyethylene (PE) products has gone through several stages, and technological progress and the expansion of application areas have promoted its widespread application. The following are the main development processes and trends:
1. Initial development
1930s: Polyethylene was first synthesized by ICI in the UK and was initially used in the military field, such as radar cable insulation materials.
1950s: With the development of the petrochemical industry, polyethylene began to be commercially produced, and low-density polyethylene (LDPE) was the main product in the early stage.
2. Technological progress
1950s-1960s: High-density polyethylene (HDPE) came into being, with higher strength and rigidity, and its application range expanded.
1970s: Linear low-density polyethylene (LLDPE) was developed, which combines the advantages of LDPE and HDPE and is suitable for film and packaging.
1980s-1990s: The application of metallocene catalysts improved the performance of polyethylene, such as transparency, strength, and processability.
3. Application expansion
Packaging: Widely used as packaging material for food, daily necessities and industrial products.
Construction: used for pipes, insulation materials and waterproof membranes.
Automobile: used for fuel tanks, interior parts and bumpers.
Medical: used for disposable medical devices and drug packaging.
Agriculture: used for ground film, greenhouse film and irrigation pipes.
4. Environmental protection and sustainable development
Degradable polyethylene: develop biodegradable and photodegradable polyethylene to reduce environmental pollution.
Recycling: strengthen polyethylene recycling technology and promote a circular economy.
Green production: use environmentally friendly processes and renewable raw materials to reduce carbon emissions.
5. Future trends
High performance: develop polyethylene with higher strength, heat resistance and chemical resistance.
Intelligence: develop intelligent polyethylene materials with self-healing, sensing, and other functions.
Nanotechnology: use nanotechnology to improve the performance of polyethylene, such as enhancing barrier properties and antibacterial properties.
Customization: develop customized polyethylene products according to different needs.
Summary
Polyethylene products have developed from simple applications to high-performance, multifunctional materials. In the future, they will continue to develop in the direction of high performance, intelligence and environmental protection, and their application areas will be further expanded