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PSU 1000 (PSU)
Brand: 
- high maximum service temperature in air;
- high mechanical strength, creep resistance and stiffness, even at elevated temperatures;
- excellent hydrolysis resistance;
- high toughness, even at low temperatures;
- very good dimensional stability.
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These semi-finished materials are produced from non-UV-stabilised polysulphone resin.
They stand out for their excellent radiation stability, low ionic impurity levels, and good chemical and hydrolysis resistance.
Compared to PEI 1000, the material has a lower property profile and is often used in replacement of polycarbonate whenever higher temperature resistance and enhanced chemical and in-autoclave resistance are required.
Specifications:
- high maximum service temperature in air (+180 °C, +170 °C, and +150 °C continuously for PPSU 1000, PEI 1000,
and PSU 1000 respectively);
- high mechanical strength, creep resistance and stiffness, even at elevated temperatures;
- excellent hydrolysis resistance (suitable for repeated steam sterilization cycles);
- high toughness, even at low temperatures;
- very good dimensional stability;
- physiologically inert;
- good electrical insulating and dielectric properties;
- translucent, non-optical quality (except for PPSU, which is black);
- very good resistance against high energy radiation.
| Properties | ISO / (IEC) standard | Unit of measurement | Value |
| General properties | |||
| Colour | yellow | ||
| translucent | |||
| Density | 1183-1 | g/cm3 | 1.24 |
| Water absorption: | |||
| - after 24/96 h immersion in water | 62 | mg | 19/38 |
| of 23 °C | |||
| 62 | % | 0.24/0.48 | |
| - at saturation in air of 23 °C / 50% RH | -- | % | 0.3 |
| - at saturation in water of 23 °C | -- | % | 0.8 |
| Thermal properties | |||
| Melting temperature | 11357-1/-3 | °C | -- |
| Glass transition temperature | 11357-1/-2 | °C | 190 |
| Thermal conductivity at 23 °C | - | W (K.m) | 0.26 |
| Average coefficient of linear thermal expansion: | |||
| - average value between 23 and 100 °C | - | m/(m.K) | 55x10-6 |
| - average value between 23 and 150 °C | - | m/(m.K) | 55x10-6 |
| - average value above 150 °C | - | m((m.K) | 70x10-6 |
| Deflection temperature under load: | |||
| - method A: 1.8 MPa | 75-1/-2 | °C | 170 |
| Max. service temperature in air: | |||
| - for short periods | - | °C | 180 |
| - continuously: min. 20,000 h | - | °C | 150 |
| Min. service temperature | -50 | ||
| Flammability: | |||
| Oxygen index | 4589-1/-2 | % | 30 |
| - according to method UL 94 | - | - | HB/HB |
| (1.5/3 mm thickness) | |||
| Mechanical properties at 23 °C | |||
| Tension test | |||
| - Tensile stress at yield / Ultimate tensile strenght | 527-1/-2 | MPa | 88/- |
| - Tensile strain at break | 527-1/-2 | % | 10 |
| - Tensile modulus of elasticity | 527-1/-2 | MPa | 2850 |
| Compression test | |||
| - Compressive stress at 1% nominal strain | 604 | MPa | 25 |
| - Compressive stress at 2% nominal strain | 604 | MPa | 49 |
| Charpy impact strength - unnotched | 179-1/1eU | kJ/m2 | NR |
| Charpy impact strength - notched | 179-1/1eA | kJ/m2 | 3.5 |
| Ball indentation hardness | 2039-1 | N/mm2 | 115 |
| Rockwell hardness | 2039-2 | - | M 89 |
| Electrical properties at 23 °C | |||
| Dielectric strength | (60243-1) | kV/mm | 30 |
| Volume resistivity | -60093 | Ohm.sq | >1014 |
| Surface resistivity | ANSI/ESD | Ohm.sq | >1013 |
| STM 1111 | |||
| Relative permittivity: | -60250 | -- | 3.0 |
| at 100 Hz | |||
| at 1 MHz | -60250 | -- | 3.0 |
| Dielectric dissipation factor, tan ‰: | -60250 | -- | 0.001 |
| at 100 Hz | |||
| at 1 MHz | -60250 | -- | 0.003 |
| Comparative Tracking Index | -60112 | -- | 150 |
| (CTI) |
Although the information provided in this product data sheet is confirmed by reliable research, POLITECNICA CETAI shall not take any responsibility for the application, processing or use of such information.
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