What is PPS natural?
PPS natural is a semi-crystalline high-performance thermoplastic based on polyphenylene sulphide. It combines a continuous service temperature of 220 °C with excellent chemical resistance, inherent flame retardancy (UL 94 V0) and almost negligible moisture absorption – an economical alternative to PEEK for many high-temperature applications.
Technical data
| Property | Value | Test method |
|---|---|---|
| General Properties | ||
| Density | 1.35 g/cm³ | DIN EN ISO 1183-1 |
| Water absorption | 0.020 % | DIN EN ISO 62 |
| Flammability (Thickness 3 mm / 6 mm) | V0/V0 | UL 94 |
| Mechanical Properties | ||
| Yield stress | 90 MPa | DIN EN ISO 527 |
| Elongation at break | 3 % | DIN EN ISO 527 |
| Tensile modulus of elasticity | 4,150 MPa | DIN EN ISO 527 |
| Ball indentation hardness | 190 MPa | DIN EN ISO 2039-1 |
| Shore hardness | 88 scale D | DIN EN ISO 868 |
| Thermal Properties | ||
| Melting temperature | 285 °C | ISO 11357-3 |
| Service temperature, long term | -20 to 220 °C | Average |
| Service temperature, short term (max.) | 260 °C | Average |
| Heat deflection temperature | 110 °C | DIN EN ISO 75, method A, HDT |
| Electrical Properties | ||
| Surface resistivity | 10^15 Ω | DIN EN 62631-3-2 |
PPS natural vs. PPS GF40 natural compared directly
| Property | PPS natural | PPS GF40 natural |
|---|---|---|
| Density | 1.35 g/cm³ | 1.65 g/cm³ |
| Yield stress | 90 MPa | 90 MPa |
| Elongation at break | 3 % | 2 % |
| Tensile modulus of elasticity | 4,150 MPa | 6,500 MPa |
| Shore hardness | 88 scale D | 92 scale D |
| Melting temperature | 285 °C | 285 °C |
| Service temperature, long term | -20 to 220 °C | 0 to 220 °C |
| Heat deflection temperature | 110 °C | 260 °C |
PPS natural in detail
1What is PPS natural?+
PPS natural is a semi-crystalline high-performance thermoplastic based on polyphenylene sulphide. It combines a continuous service temperature of 220 °C with excellent chemical resistance, inherent flame retardancy (UL 94 V0) and almost negligible moisture absorption – an economical alternative to PEEK for many high-temperature applications. Below 200 °C there is practically no solvent that attacks PPS; the material is resistant to fuels, oils, acids and alkalis and hydrolysis resistant against hot water. PPS is also a very good electrical insulator.
2How does Liedtke machine PPS natural?+
PPS natural can be machined using all conventional cutting methods; sharp carbide tools and good cooling via chip removal avoid heat build-up and residual stresses in the part. For tight tolerances and thick-walled parts, we recommend intermediate annealing to relieve machining stresses; thanks to the low moisture absorption, no conditioning is required.
3When should I choose PPS natural?+
PPS natural is used wherever components must withstand high temperatures and aggressive media at the same time – for example in the oil and gas industry, in the electrical and electronics industry, in vehicle construction and in chemical plant engineering:
- Pump and valve components for aggressive media
- Insulating and connector parts for high temperatures
- Seals, bushings and guides in the engine compartment
4What determines the price of a PPS natural part?+
PPS natural is calculated individually based on drawing or sample. The part price is determined mainly by the semi-finished form and dimensions, material utilisation and offcuts, machining effort and batch size. We are happy to provide binding prices on request.
5When is PPS natural not the right choice?+
The limits of the material are equally important:
- Low toughness, impact sensitive
- Heat deflection temperature under load only 110 °C
- Not resistant to oxidising acids at high temperatures
6Advantages and disadvantages of PPS natural+
An honest assessment:
- Advantage: Continuous service temperature 220 °C, short term up to 260 °C
- Advantage: Excellent chemical and hydrolysis resistance
- Advantage: Inherently flame retardant (UL 94 V0), very good insulator
- Advantage: Very low moisture absorption, high dimensional stability
- Disadvantage: Low toughness, impact sensitive
- Disadvantage: Heat deflection temperature under load only 110 °C
- Disadvantage: Not resistant to oxidising acids at high temperatures
Typical properties
- Very high continuous service temperature
- Inherently flame retardant
- High chemical resistance
- Very low moisture absorption
Typical industries
- Oil and Gas Industry
- Electrical Industry
- Automotive Industry
- Chemical Plant Engineering
Downloads for PPS natural
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A drawing or a sample is enough. We calculate concretely and advise openly whether PPS natural is optimal for your application or an alternative makes more sense.
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