Tectron / PPS

Overview

Polyphenylene Sulphide (PPS) is a semi-crystalline high-performance thermoplastic supplied under several trade names, with Tectron being a common one used in the engineering plastics market. PPS is valued for its outstanding chemical resistance — among the broadest of any engineering thermoplastic — combined with good elevated-temperature performance, inherent flame resistance, and excellent dimensional stability. Unfilled PPS is brittle; it is almost always used in glass-filled or glass/mineral-filled compound form for structural applications. PPS is widely used in chemical processing, automotive, and semiconductor equipment where its combination of inertness and stability is essential.

Working properties

• Chemical resistance

  PPS offers exceptional resistance to a very broad range of chemicals — acids, bases, solvents, fuels, and hydraulic fluids — making it one of the most chemically inert engineering thermoplastics available. It is one of the few materials that retains good properties after prolonged chemical exposure at elevated temperatures.

• High continuous service temperature

  PPS can operate continuously at temperatures above most engineering plastics. Glass-filled grades extend this capability further and are used in applications where PEEK might otherwise be specified but cost is a driver.

• Inherent flame resistance

  PPS is inherently non-flammable without halogenated additives. This is a significant advantage in applications where material flammability classification is important.

• Brittleness in unfilled form

  Unfilled PPS has relatively low impact strength and is brittle compared with PEEK or Ultem at the same temperature. Glass-filled grades improve stiffness and impact resistance. The filler choice should match the mechanical requirements of the application.

• Dimensional stability

  PPS has very low moisture absorption and excellent dimensional stability in service. Machined parts hold tight tolerances well, making PPS a strong choice for precision components in humid or wet chemical environments.

• Machinability

  PPS machines reasonably well on standard CNC equipment, though glass-filled grades increase tool wear. Parts can be machined to close tolerances. Standard tooling appropriate for other high-performance plastics is used.

Typical uses

• Chemical processing equipment — pump housings, impellers, valve bodies
• Semiconductor wet bench components and wafer carriers
• Automotive underbonnet and fuel system components
• Electrical connectors and precision insulating components
• High-temperature structural parts in corrosive environments

Things to confirm before ordering

• Grade — glass-filled (GF40 is common) or unfilled; unfilled PPS is rarely used structurally due to its brittleness.
• Colour — PPS is typically dark grey or black; confirm if colour is relevant to your application.
• Chemical exposure — while PPS is broadly chemically resistant, confirm compatibility with your specific process chemicals, particularly at elevated temperatures.
• Certifications — if traceable material documentation is required, specify at enquiry.

How does Tectron / PPS compare?

• PEEK →

  PEEK is tougher (especially in unfilled form), has a higher maximum service temperature, and is better in certain solvent environments. PPS is typically a lower-cost option where PEEK's full performance is not required.

• PVDF (Kynar) →

  PVDF has outstanding chemical resistance to halogens and strong oxidising acids where PPS may not be suitable. PVDF is less stiff and has a lower maximum service temperature than PPS glass-filled grades.