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In the field of high-performance engineering plastics, the polysulfone family (PSU, PPSU, PESU) has become the "star" of the materials world due to its outstanding performance and wide range of applications. As a star member of specialty engineering plastics, polysulfone materials have shone brightly in the medical, electronic, automotive and other fields. Today, Dafu New Materials takes you through a comprehensive understanding of their properties, applications and future in one article!
I. The Three Brothers of the Polysulfone Family: A Comparison of Their Characteristics
The polysulfone family mainly includes polysulfone (PSU), polyphenylene sulfone (PPSU), and polyethersulfone (PESU). Each of them has its own focus in terms of chemical structure, performance characteristics, and application fields, collectively forming a complete system of polysulfone materials.

▲Three types of polysulfone structural formulas:

1. PSU (Polysulfone) : The King of insulation, PSU is the most fundamental member of the polysulfone family and has excellent comprehensive performance. It has excellent thermal stability and can maintain good mechanical strength and dimensional stability even in high-temperature environments. It also has excellent hydrolysis resistance and chemical stability, and can resist the erosion of various acids, alkalis and organic solvents. In addition, it has excellent electrical insulation performance, low water absorption rate, is halogen-free and easy to process, and has good flame retardancy.

▲Dafu New Materials' PSU (Polysulfone) real photo

2.PPSU (polyphenylsulfone) : Transparent Guardian PPSU is the "hydrolysis resistance champion" in the polysulfone family. Its heat distortion temperature is the highest among the three materials. It has extremely high impact toughness and chemical stability, and is resistant to repeated high-temperature sterilization. PPSU is non-toxic, odorless, and chemically resistant, meeting the requirements for food contact materials. It is the preferred choice for medical devices and food contact materials.

▲Dafu New Materials' PPSU (polyphenylsulfone) real photo

3. PESU (Polyethersulfone) : The all-round warrior

PESU has the best comprehensive performance, combining the electrical insulation of PSU and the heat resistance of PPSU. It has excellent processing performance and is suitable for injection molding, extrusion and other processes. Moreover, it is resistant to creep and can maintain dimensional stability under high temperature and high load. PESU has excellent flame retardancy, as well as good electrical insulation and radiation resistance.

▲Dafu New Materials' PESU (Polyethersulfone) real photos

2. Application fields of the Polysulfone family The excellent performance of the polysulfone family has enabled it to be widely used in multiple fields. The following are some of the main application scenarios:

1. Medical and health care: Synonymous with safety and durability ·PPSU: Baby bottles, endoscope disinfection boxes, surgical instrument trays, with their high-temperature sterilization resistance and biocompatibility, have become the benchmark of medical-grade materials. ·PSU: Humidification tanks for ventilators and hemodialysis membranes rely on their hydrolysis resistance and transparency to ensure the long-term stable operation of the equipment.

▲Applications: baby bottles, endoscope disinfection boxes, ventilator humidification tanks (network materials)

2.Electronics and electrical appliances: guardians in high-temperature environments

·PESU: circuit board, chip carrier, capable of maintaining stable electrical performance at 180℃, avoiding failure caused by high temperature.

·PSU: Circuit breakers and relay components, with their high insulation and dimensional stability, have become core materials for power transmission.

▲Applications: Circuit breakers, chip carriers (network materials)

3. Environmental protection and new energy: Drivers of a green future

·PSU/PESU: Water treatment membranes and fuel cell ion exchange membranes, facilitating wastewater treatment and clean energy development.

·PPSU: used for the shell of air purifiers, it is corrosion-resistant and lightweight, enhancing equipment lifespan.

4. Automobile: Balance between Lightweight and Durability

·PPSU: fuel pipes, brake components, resistant to oil and high temperatures, replacing metal to reduce vehicle weight.

▲Application: new energy and automotive fields (network materials)

III. Future Trends: Accelerated Domestic Substitution and Innovation-Driven Development

   Currently, the domestic market for high-end polysulfone materials is still monopolized by foreign enterprises. With the continuous technological advancements and expansion of production capacity of domestic enterprises, the localization of polysulfone materials will become the future development trend. Domestic enterprises will increase their R&D investment, improve product quality and performance, and gradually replace imported products.

▲Data source: Grand View Research

IV. Dafu | Polysulfone family, defining the future with technology!

Whether it's the bottle that safeguards health or the aircraft component that soars through the sky, polysulfone materials are reshaping the boundaries of industry and life with their irreplaceable performance.

Dafu New Materials will continue to be committed to research and development and production, providing customers with higher-quality products and services. Follow Dafu New Materials now to obtain polysulfone material samples and technical solutions, and seize the opportunities in high-end manufacturing!