Polysulfone (PSU) is a versatile engineering plastic that has been increasingly adopted across various industries due to its exceptional mechanical, thermal, and chemical properties. This article provides an in-depth look at the properties and applications of PSU plastic, highlighting the PSU machining service at CNCJY and its uses in different fields.
What Is PSU Plastic?
Polysulfone (PSU) is a high-performance, amber-colored, amorphous polymer that is transparent or semi-transparent. It has excellent mechanical properties, including rigidity, abrasion resistance, and heat resistance, which are particularly notable in high-temperature environments. The PSU plastic can maintain its performance from -100 to 150 ℃, with a long-term operating temperature of 160°C and a short-term operating temperature of 190°C or higher. Its glass transition temperature is 187°C. Different grades and types of PSU plastics may have different heat resistance properties.
As a heat-resistant engineering plastic, PSU has high mechanical strength, electrical insulation, and resistance to heat deformation. It also has good chemical resistance, especially in terms of resistance to chemical corrosion. Additionally, PSU has excellent radiation stability, low ionic impurities, and is resistant to hydrolysis and deposition, making it suitable for use in steam sterilization chambers. PSU plastic also has good dimensional stability, a low molding shrinkage rate, and is non-toxic, and flame retardant. Notably, PSU can be transmitted through infrared light and microwaves.
PSU Plastic Machining Specifications and Capabilities
| Tolerance | ± 0.010″ (± 0.25 mm) or depends on the requirement and the type of PSU used |
| Maximum Part Size | Determined by the machine and part geometry |
| Wall Thickness | Minimum ± 0.03 inches (± 0.8 millimeters) or determined by the PSU type and part geometry |
| Technology | 4-axis and 5-axis CNC milling, CNC turning, injection molding |
| Delivery Time | As fast as 3 days, depending on the complexity of the parts and the quantity of the order |
| Industries | Military, Aerospace, Automotive, Petrochemical, Textile Machinery, Precision Machinery, Medical, Instrumentation, Electronic Semiconductor, etc. |
| Parts | Bearings, bushings, connectors, pump parts, electrical insulators, pipe fittings and manifolds, aircraft accessories, sensors, surgical tool plates, spray, fluid controllers, etc. |
PSU Plastic Material Properties
| Density | 1.24 g/cm3 |
| Tensile Strength | Above 75MPa |
| Bending Strength | Above 100MPa |
| Heat Deflection Temperature | 170°C |
| Flame Retardant Performance | Excellent |
| Arc Resistance | Excellent |
| Dielectric Property | Excellent |
| Creep Resistance | Excellent |
| Insulation | Excellent |
| Water Resistance | Excellent |
| Chemical Resistance | Excellent |
| Dimensional Stability | Good |
| Coefficient of Thermal Expansion | Low |
| Heat Resistance | Can be used for a long time at 160°C |
Surface Treatment of CNC Machined PSU Parts
The main surface finishing processes for CNC machined PSU plastic parts include low-temperature burr removal, sandblasting, and bead blasting, which are suitable for different applications.
1. Low-temperature burr removal
Low-temperature burr removal is a method to improve the surface quality and appearance of parts or components. Due to its lubricating properties, this technique can be easily applied to PSU components. In some cases, surface smoothness is critically important for certain parts. Low-temperature burr removal removes any excess material, burrs, or irregularities on the part surface by exposing the part to freezing temperatures, making it brittle. The part is then exposed to a polycarbonate medium, eliminating all inconsistencies and providing fine surface finishing while maintaining its original structure and physical characteristics, suitable for PSU parts requiring high precision and quality surfaces. However, the effect may be limited for some complex parts, and the cost is relatively high.
2. Sandblasting
By high-speed air compression of quartz sand or iron sand sprayed onto the part surface, the surface oxide layer and impurities can be removed to make the surface smoother and more uniform. Specific equipment and materials are required, and there may be a certain amount of noise and dust generated during the operation, which will have some impact on the environment and operating personnel.
3. Bead blasting
Similar to sandblasting, using steel beads instead of sand grains, can also effectively remove the surface oxide layer and impurities to improve the surface roughness and smoothness. Special equipment is also required, and there may be relatively loud noise and some dust problems during processing.
Why Choose CNCJY for PSU Plastic Machining & Manufacturing?
- Cost-Effective Solutions. CNCJY.COM offers economical and efficient PSU CNC machining services and solutions, helping you save time and money on your PSU component manufacturing. Our competitive price ensures that you get the best value for your investment.
- Advanced CNC Machinery and Expertise. With our state-of-the-art CNC machines and rich experience in PSU CNC machining, we have a fully equipped facility to meet your specific requirements. Our team of experts has the knowledge and skills to handle complex PSU machining projects with precision and accuracy.
- Commitment to Quality and Accuracy. We prioritize quality and accuracy in every aspect of our PSU machining services. We are committed to producing high-quality PSU machined parts that meet the ISO 9001:2015 quality assurance standards. Our rigorous quality control processes ensure that every component meets the highest standards of excellence.
- Timely Delivery and Transparent Order Tracking. We’ll ensure that you stay informed throughout the manufacturing process. Our customers have consistently praised our prompt delivery and efficient communication.
- Customized Solutions and Online Services. CNCJY.COM offers customized machining and design services to meet your specific requirements. Our online CNC machining services and instant quoting capabilities ensure a seamless experience, allowing you to get instant quotes and place orders online with ease.
- Innovation and Continuous Improvement. We invest in technology and research to drive innovation and continuously improve our services. Our commitment to staying at the forefront of PSU machining technology ensures that you benefit from the latest advancements and techniques.
FAQs about PSU
1. Can you machine PSU bearings?
Yes, PSU is a thermoplastic that is relatively rigid and self-lubricating, making it suitable for bearing applications. It has good strength and wear resistance compared to other plastics. We can fabricate PSU bearings using turning, milling, grinding, injection molding, and other processes, and are also capable of producing PSU materials for lots of other parts like bushing, connectors, and parts for various industries.
2. What are the application prospects of PSU plastic in the medical industry?
PSU plastic has a wide range of applications in the medical industry due to its unique properties. Its resistance to steam, hydrolysis, and high-temperature steam sterilization makes it an ideal material for surgical instrument trays, ensuring the safety and hygiene of medical instruments. Additionally, its high transparency and dimensional stability make it suitable for spray nozzles, which are used in medical devices such as nebulizers and inhalers. Furthermore, PSU plastic’s chemical resistance and ability to withstand high temperatures make it a reliable material for fluid controllers, which are used in medical devices such as dialysis machines and infusion pumps. Its biocompatibility and resistance to corrosion also make it a potential material for heart valves, pacemakers, and dental implants. Moreover, PSU plastic’s high transparency and resistance to steam make it an ideal material for protective face masks, which are used to prevent the spread of infectious diseases.
3. Which electronic components can be produced by PSU?
PSU parts and products are extensively used in electronics and electrical appliances, serving a variety of purposes. They can be found in various connectors and terminals, such as contactors and plug-in components. Additionally, PSU materials are used in transformer insulation components, including controlled silicon caps and insulation sleeves. Furthermore, they are used in coil bobbins and wire leads, which are essential components in many electrical devices. PSU parts are also used in electrical components, such as circuit boards, axial sleeves, and TV system components. Moreover, they are used in electric brush holders and alkaline battery casings, which are vital components in many electrical systems.
4. What is PSU (Polysulfone) used for?
Polysulfone is used in a variety of industries due to its desirable properties, especially in medical, electronics, food processing, aerospace, and automotive applications, as well as in laboratory equipment, construction, and oil and gas industries.
5. What are the advantages and disadvantages of PSU plastic?
Pros:
- Excellent mechanical performance: high rigidity, strength, and wear resistance, and maintains good mechanical performance even at high temperatures.
- Good heat resistance: exceptional heat resistance, with a long-term use temperature of up to 160°C, and a short-term use temperature of up to 190°C.
- Strong chemical stability: good resistance to various acids, bases, and chlorine-containing chemicals, and can resist hydrolysis and oxidation.
- Good dimensional stability: a low molding shrinkage rate, high modulus, and low internal stress cracking.
- Good transparency: a slightly amber-colored non-crystalline transparent or semi-transparent polymer, suitable for applications requiring transparent materials.
- Good electrical insulation: performs well in the electronics field, with good insulation and processability.
- Good biocompatibility: good biocompatibility, and is widely used in medical devices and food packaging.
Cons:
- High production cost: due to its complex manufacturing process and the need for high-quality raw materials, the production cost of polysulfone is relatively high, which limits its application in some low-cost fields.
- High processing difficulty: a high melt viscosity and a high melting point restrict its processing and application in high-temperature environments.
- Sensitive to ultraviolet light: may undergo performance degradation after long-term exposure to ultraviolet light.