Polysulfone (PSU) is a high-performance thermoplastic widely used in industries that require consistent strength, thermal stability, and reliable performance under demanding operating conditions. As a high temperature plastic material, Polysulfone maintains its mechanical and electrical properties across a broad temperature range, making it a practical choice for applications where conventional plastics may fall short. It is also one of the most trusted engineered plastics for components exposed to hot water, steam, and challenging chemical environments.
A tough, rigid, high-strength transparent thermoplastic, Polysulfone (PSU) maintains its properties over a wide temperature range (-150°F to above 300°F), often replacing polycarbonate when higher temperatures, improved chemical resistance, or autoclavability are required.
Polysulfone (PSU) belongs to a family of sulfur-containing thermoplastics and is closely related to polyethersulfone (PES). This amber-colored, semi-transparent material is an amorphous, high-performance thermoplastic recognized for its excellent mechanical strength, dimensional stability, and low moisture absorption. Reinforced grades improve toughness and dimensional stability even further, although they become opaque as a result.
As one of the industry's trusted engineered plastics, Polysulfone offers properties that support demanding manufacturing and industrial applications, including:
Polysulfone may be processed through extrusion, injection molding, and blow molding, making it suitable for a wide variety of fabricated and machined components.
For applications exposed to elevated temperatures, steam, or repeated sterilization, Polysulfone continues to be a dependable material choice. As a high temperature plastic material, it can be used as an alternative to polycarbonate or acrylic where greater heat resistance or exposure to hot water and steam is expected. Its excellent chemical resistance also supports long service life in many industrial environments.
If your application requires material performance without sacrificing dimensional stability, Polysulfone offers an excellent balance of strength, thermal performance, and durability. At Emco Industrial Plastics, we supply Polysulfone materials that meet the performance expectations of industries ranging from manufacturing and food processing to medical and laboratory applications.
Food-grade Polysulfone and custom colors are available to meet a range of application requirements. Food-grade Polysulfone complies with FDA, NSF, 3A-Dairy, and USP Class VI standards, making it suitable for regulated environments where material compliance is essential.
Whether you need stock shapes for machining or assistance selecting the right grade, Emco Industrial Plastics offers access to quality Polysulfone materials backed by knowledgeable support. Our team can help identify the material option that aligns with your performance requirements and fabrication needs.
Emco Industrial Plastics supplies a variety of well-known Polysulfone brands, including Ensifone®, Thermalux®, Udel®, Unifone® PSO, PSU 1000, Sustason® PSU, and Hydex® 6201.
Emco Industrial Plastics does not claim to represent all manufacturers or trade name products listed. This list serves as a guide to typical Polysulfone materials available for purchase. If you need assistance selecting a specific grade or brand, contact an Emco Industrial Plastics representative for product recommendations and material availability.
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| Type | Size | Length | Color |
|---|---|---|---|
| Sheet | .030″ – 4″ TH | Standard 24″ x 48″, 48″ x 96″, CTS | Amber |
| Rod | 3/16″ – 8″ DIA | CUSTOM | Amber |
| Tube | 2″ – 14″ ID; 4″ – 15″ OD | Standard | Amber |
Give us your cut-to-size dimensions. We will precision-cut these plastics to your exact size. Additional sizes and colors available upon request.
| Physical Properties | Units | ASTM | Results |
|---|---|---|---|
| Density | lb/in³ | D792 | 0.045 |
| Water Absorption, 24 hrs | % | D570 | 0.3 |
| Mechanical Properties | Units | ASTM | Results |
|---|---|---|---|
| Tensile Strength @yield | psi | D638 | 10200 |
| Tensile Modulus | psi | D638 | 360000 |
| Tensile Elongation @Break | % | D638 | 30 |
| Flexural Strength | psi | D790 | 15000 |
| Flexural Modulus | psi | D790 | 400000 |
| Compressive Strength | psi | D695 | 13000 |
| Compressive Modulus | psi | D695 | 375000 |
| Hardness, Rockwell R | D785 | M82/R128 | |
| IZOD Impact Strength Notched | ft-lb/in | D256 | 1.3 |
| IZOD Impact Strength Un-notched | ft-lb/in | D256 | NO BREAK |
| Thermal Properties | Units | ASTM | Results |
|---|---|---|---|
| Coefficient of Linear Thermal Expansion | (x 10⁻⁵ in./in./°F) | D256 | 3.1 |
| Heat Deflection Temp at 66 psi | °F | D648 | 358 |
| Heat Deflection Temp at 264 psi | °F | 340 | |
| Melting Temperature | °F | D3418 | 374 |
| Max Operating Temp | °F | 300 | |
| Thermal Conductivity | BTU-in/ft²-hr-°F | C177 | 3.1 x 10⁻⁵ |
| Flammability Rating | UL94 | HB |
| Electrical Properties | Units | ASTM | Results |
|---|---|---|---|
| Dielectric Strength | V/mil | D149 | 425 |
| Dielectric Constant | 1MHz | D150 | 3.14 |
| Dissipation Factor @ 60 Hz | 1MHz | D150 | 0.0008 |
| Volume Resistivity, 50% RH | ohm-cm | D257 | 5 x 10¹⁶ |
NOTE: The property values presented above are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers’ complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.
