Cost-Effective PPS Alternative to PEEK for Durable Industrial Components

Designed for applications requiring chemical resistance, dimensional stability, and improved durability at a lower cost than PEEK.

Unfilled PPS offers reliable machining performance and stable mechanical properties for demanding industrial environments where ultra-high temperature capability is not required.

Excellent chemical resistance
Cost-effective alternative to PEEK
Improved toughness and durability
Strong dimensional stability
Reliable machining performance
Benefits

What Unfilled PPS Offers

Performance characteristics that make Unfilled PPS suitable for chemically aggressive and high-temperature applications.

Improved Durability and Toughness

Enhanced toughness helps reduce brittleness and improve resistance to cracking, chipping, and handling damage compared to standard PPS.

Cost-Effective Alternative to PEEK

Provides many of the dimensional stability and chemical resistance benefits associated with high-performance polymers while offering a lower-cost solution for industrial applications that do not require PEEK-level temperature capability.

Excellent Chemical Resistance

Performs reliably in chemically aggressive environments exposed to fuels, oils, solvents, acids, and industrial process chemicals.

Reliable Machining Performance

Designed for stable machining behavior with improved resistance to edge chipping and cracking compared to more brittle PPS formulations.

Strong Dimensional Stability

Low moisture absorption and thermal stability help maintain tolerances during machining and operation.

Applications

Common Components Made from Unfilled PPS

Typical machined parts that benefit from PPS's chemical resistance and thermal stability.

Automotive under-the-hood components

Handles exposure to fuels, oils, and elevated temperatures.

Industrial structural components

Used where chemical exposure and dimensional stability are critical.

Semiconductor equipment parts

Suitable for fixtures and supports requiring cleanliness and chemical resistance.

Electrical and electronic components

Used for connectors and insulating parts exposed to heat and chemicals.

Seals, seats, and housings

Provides stability and resistance in fluid handling systems.

Pump and valve components

Used in chemical processing equipment exposed to aggressive media.

Technical data

Unfilled PPS Technical Properties

Mechanical Properties
Property Test Impact-Modified PPS Unit
Tensile Strength ASTM D638 12,000 PSI
Tensile Modulus ASTM D638 650 KSI
Elongation @ Break ASTM D638 4.0 %
Flexural Strength ASTM D790 18,000 PSI
Flexural Modulus ASTM D790 600 KSI
Compressive Strength ASTM D695 20,000 PSI
Izod Impact (notched) ASTM D256 1.2 ft-lb/in
Hardness Rockwell ASTM D785 M95/R120
Thermal Properties
Property Test Impact-Modified PPS Unit
HDT @ 264 psi ASTM D648 500 °F
Melting Point 540–550 °F
CLTE ASTM E831 2.2 in/in/°F × 10⁻⁵
Thermal Conductivity ASTM C177 1.8 BTU·in/hr·ft²·°F
Electrical Properties
Property Test Impact-Modified PPS Unit
Dielectric Strength ASTM D149 450 V/mil
Dielectric Constant ASTM D150 3.5
Dissipation Factor ASTM D150 0.004
Surface Resistivity ASTM D257 10¹⁵ Ω/sq
Volume Resistivity ASTM D257 10¹⁵ Ω·cm
Wear Properties
Property Test Impact-Modified PPS Unit
Coefficient of Friction (Dynamic) ASTM D3702 0.40
Wear Rate (K-factor) ASTM D3702 180 ×10⁻¹⁰ in³·min/ft·lb·hr
Miscellaneous Properties
Property Test Impact-Modified PPS Unit
Specific Gravity ASTM D792 1.36
Water Absorption (24hr) ASTM D570 0.03 %
Flammability UL94 V-0
Stock shapes

Unfilled PPS Rods, Plates and Tubular Bars

Extruded stock shapes are supplied in standard diameters and thicknesses, with custom dimensions available for specific applications.

Rods

Extruded Unfilled PPS rods are supplied for durable machined components requiring toughness and dimensional stability. Rods available from 1/2" to 4” diameter.

Plates

Unfilled PPS plates are supplied for structural and precision machined applications.Plates available from 3/8" to 4" thickness.

Tubular bars

Tubular bars are available for bushings, wear rings, and cylindrical components where lower machining waste and improved material utilization are important.

Available Colors
Black
Natural
Size Chart

Available Sizes for Unfilled PPS

Form Dimension Sizes Standard length
Rod Diameter 0.500", 0.750", 0.875", 1.000", 1.250", 1.375", 1.500", 1.625", 1.750", 1.875", 2.000", 2.225", 2.500", 2.750", 3.000", 3.500", 4.000", 4.500", 5.000", 5.500", 6.000" 96" for diameters below 4.000"
48" for diameters 4.000" and above
Plate Thickness 0.500", 0.625", 0.750", 0.875", 1.000", 1.250", 1.375", 1.500", 1.625", 1.750", 1.875", 2.000", 2.225", 2.500", 2.750", 3.000", 3.500", 4.000" 24" × 48" for thicknesses below 3.000"
12" × 48" for thicknesses 3.000" and above
Tubular bar OD / wall thickness OD: 4"–8"
Wall thickness: 1", 2"
48" custom on request

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Grade comparison

How Unfilled PPS compares to other PPS grades

Quick reference guide to help you choose the right PPS material.

Grade Best for Stiffness Chemical resistance Notes
PPS IM (unfilled) Chemically aggressive environments Moderate Excellent Best chemical resistance and easier machining
PPS GF30 Structural parts needing balanced stiffness and durability High Excellent 30% glass fiber reinforced for dimensional stability and load-bearing performance
PPS CF30 Lightweight structural components Very high Excellent 30% carbon fiber reinforced with high stiffness-to-weight performance
Bearing Grade PPS Bushings, bearings, and sliding wear parts High Excellent PTFE, carbon fiber, and graphite filled for low friction and wear resistance
PPS GF40 High-load structural components Very high Excellent Increased stiffness and reduced creep

Need help determining if Unfilled PPS is the right choice?

Share your chemical exposure details, operating temperatures, or part requirements and our technical team will guide you on grade selection, stock formats, and supporting documentation.

  • Response within one business day
  • Reviewed by our technical team
  • No obligation or sales pressure

Frequently Asked Questions

When should PPS IM be chosen over PPS GF40?

Choose PPS IM when chemical resistance and ease of machining are more important than maximum stiffness or load-bearing capability.

How does Unfilled PPS compare to PEEK?

Unfilled PPS can serve as a cost-effective alternative to PEEK in applications where the higher continuous operating temperature capability of PEEK is not required.

Is Unfilled PPS as stiff as standard PPS?

No. Impact modification improves toughness and durability, but slightly reduces stiffness and rigidity compared to standard PPS or heavily glass-filled PPS grades

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