Overview
PPS (Polyphenylene Sulfide) is a high-performance semi-crystalline thermoplastic renowned for its exceptional chemical resistance, dimensional stability, flame retardancy, high-temperature performance, and electrical insulation properties.
PPS combines the processing advantages of thermoplastics with performance characteristics typically associated with metals and thermoset materials. It is widely used in automotive, electronics, aerospace, industrial equipment, and semiconductor applications where reliability under harsh operating conditions is critical.
PPS is widely used in:
- Automotive Components
- Electrical Connectors
- Semiconductor Equipment
- Pump and Valve Parts
- Industrial Machinery
- Aerospace Components
- Chemical Processing Systems
- High-Temperature Insulators
Due to its excellent resistance to heat, chemicals, and moisture, PPS is considered one of the most versatile engineering plastics available.
Material Specification
| Property | Value |
|---|---|
| Material Designation | PPS |
| Full Name | Polyphenylene Sulfide |
| Material Family | High-Performance Thermoplastic |
| Density | 1.34–1.37 g/cm³ |
| Appearance | Natural Brown, Black |
| Typical Manufacturing Methods | Injection Molding, Compression Molding, CNC Machining |
| Standard Forms | Pellets, Sheet, Rod, Tube |
Chemical Composition
PPS consists of aromatic benzene rings linked by sulfur atoms, creating a highly stable polymer structure.
| Component | Function |
|---|---|
| Polyphenylene Sulfide Polymer | Structural Matrix |
| Glass Fiber (Optional) | Stiffness Enhancement |
| Mineral Fillers (Optional) | Dimensional Stability |
| PTFE Additives (Optional) | Wear Improvement |
The molecular structure provides exceptional resistance to heat and chemicals.
Common PPS Grades
| Grade | Characteristics |
|---|---|
| Virgin PPS | General Engineering Applications |
| Glass-Filled PPS | Improved Strength & Stiffness |
| Mineral-Filled PPS | Enhanced Dimensional Stability |
| PTFE-Filled PPS | Improved Wear Resistance |
| Conductive PPS | ESD Applications |
Mechanical Properties
Typical Values
| Property | Value |
|---|---|
| Tensile Strength | 70–90 MPa |
| Yield Strength | 70–85 MPa |
| Elongation at Break | 1–3% |
| Flexural Strength | 110–150 MPa |
| Flexural Modulus | 3.0–4.5 GPa |
| Hardness | Rockwell M95–105 |
| Compressive Strength | 100–150 MPa |
Typical Mechanical Performance
| Property | Performance |
|---|---|
| Strength | Excellent |
| Stiffness | Excellent |
| Creep Resistance | Outstanding |
| Fatigue Resistance | Excellent |
PPS maintains mechanical performance exceptionally well under continuous thermal loading.
Physical Properties
| Property | Value |
|---|---|
| Density | 1.34–1.37 g/cm³ |
| Water Absorption | <0.05% |
| Thermal Conductivity | 0.25–0.35 W/m·K |
| Specific Heat Capacity | 1000–1200 J/kg·K |
| Coefficient of Thermal Expansion | Very Low |
PPS exhibits outstanding dimensional stability due to its low moisture absorption and low thermal expansion.
Thermal Properties
| Property | Value |
|---|---|
| Melting Point | 280–290°C |
| Glass Transition Temperature | 85–95°C |
| Heat Deflection Temperature | 230–260°C |
| Continuous Service Temperature | Up to 220°C |
| Short-Term Service Temperature | Up to 260°C |
PPS offers excellent thermal performance for demanding industrial applications.
Strength-to-Weight Ratio
| Material | Density (g/cm³) | Tensile Strength |
|---|---|---|
| PPS | 1.35 | 80 MPa |
| PSU | 1.26 | 75 MPa |
| PEEK | 1.31 | 100 MPa |
| Aluminum 6061 | 2.70 | 310 MPa |
PPS provides excellent structural efficiency while remaining lightweight.
Chemical Resistance
| Chemical Environment | Performance |
|---|---|
| Water | Outstanding |
| Acids | Outstanding |
| Alkalis | Excellent |
| Hydrocarbons | Outstanding |
| Fuels | Outstanding |
| Solvents | Outstanding |
| Oils & Greases | Outstanding |
| Salt Solutions | Outstanding |
PPS is one of the most chemically resistant engineering thermoplastics available.
Corrosion Resistance
| Property | Performance |
|---|---|
| Moisture Resistance | Outstanding |
| Corrosion Resistance | Outstanding |
| Environmental Stability | Outstanding |
| Weather Resistance | Excellent |
PPS performs exceptionally well in aggressive industrial environments.
Flame Retardancy
| Property | Performance |
|---|---|
| Self-Extinguishing | Yes |
| UL Flammability Rating | UL94 V-0 |
| Flame Resistance | Outstanding |
| Smoke Generation | Low |
PPS is inherently flame retardant without requiring additives.
Electrical Properties
| Property | Value |
|---|---|
| Volume Resistivity | >10¹⁶ Ω·cm |
| Surface Resistivity | >10¹⁴ Ω |
| Dielectric Strength | 15–25 kV/mm |
| Dielectric Constant | 3.0–3.5 |
PPS is widely used in electrical and electronic insulation applications.
Dimensional Stability
| Property | Performance |
|---|---|
| Thermal Expansion Control | Outstanding |
| Moisture Stability | Outstanding |
| Precision Retention | Outstanding |
| Creep Resistance | Outstanding |
PPS is ideal for precision components operating under thermal and chemical stress.
Wear Resistance
| Property | Performance |
|---|---|
| Abrasion Resistance | Excellent |
| Sliding Wear Resistance | Excellent |
| Surface Durability | Excellent |
| Bearing Performance | Good |
Filled grades provide enhanced tribological performance.
Machinability
| Process | Rating |
|---|---|
| CNC Milling | Excellent |
| CNC Turning | Excellent |
| Drilling | Excellent |
| Tapping | Good |
| Precision Machining | Excellent |
Machinability Comparison
| Material | Machinability |
|---|---|
| PPS | Excellent |
| PEEK | Excellent |
| PSU | Excellent |
| POM | Outstanding |
PPS machines accurately and maintains tight tolerances.
Manufacturing Characteristics
| Manufacturing Process | Rating |
|---|---|
| Injection Molding | Outstanding |
| Compression Molding | Excellent |
| CNC Machining | Excellent |
| Insert Molding | Excellent |
| Precision Manufacturing | Outstanding |
PPS is one of the most widely used high-performance injection molding materials.
International Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ISO | PPS |
| ASTM | Polyphenylene Sulfide |
| DIN | PPS |
| JIS | PPS |
| GB/T (China) | 聚苯硫醚（PPS） |
| UL | UL94 V-0 Available |
Available Forms
| Product Type | Availability |
|---|---|
| Pellets | Yes |
| Sheet | Yes |
| Rod | Yes |
| Tube | Yes |
| Injection Molded Parts | Yes |
| Precision Machined Components | Yes |
Typical Applications
Automotive Industry
- Water Pump Components
- Thermostat Housings
- Fuel System Components
- Electrical Connectors
Electrical & Electronics
- Connector Housings
- Switch Components
- Sensor Parts
- High-Voltage Insulators
Semiconductor Industry
- Wafer Handling Components
- Chemical Processing Parts
- Precision Fixtures
Aerospace Industry
- Structural Components
- Electrical Insulation Parts
- High-Temperature Connectors
Industrial Equipment
- Pump Components
- Valve Seats
- Bearing Components
- Compressor Parts
Chemical Processing
- Corrosion-Resistant Parts
- Fluid Handling Components
- High-Purity Equipment
Manufacturing Characteristics
| Manufacturing Process | Rating |
|---|---|
| Injection Molding | Outstanding |
| CNC Machining | Excellent |
| High-Precision Production | Outstanding |
| Industrial Component Manufacturing | Outstanding |
Advantages
Outstanding Chemical Resistance
Resists most industrial chemicals, fuels, and solvents.
Excellent High-Temperature Performance
Continuous service temperatures up to 220°C.
Superior Dimensional Stability
Maintains precision under heat and moisture exposure.
Inherent Flame Retardancy
Naturally UL94 V-0 without additives.
Excellent Electrical Insulation
Widely used in electronic and electrical systems.
Low Moisture Absorption
Provides consistent long-term performance.
Limitations
Lower Impact Resistance
More brittle than PPSU or PEEK.
Limited Transparency
Naturally opaque material.
Higher Cost
More expensive than standard engineering plastics.
Lower Toughness Than PEEK
Not ideal for high-impact applications.
Comparison with High-Performance Plastics
| Property | PPS | PEEK | PSU | PPSU |
|---|---|---|---|---|
| Chemical Resistance | Outstanding | Excellent | Good | Excellent |
| Heat Resistance | Excellent | Outstanding | Excellent | Outstanding |
| Dimensional Stability | Outstanding | Excellent | Excellent | Excellent |
| Impact Resistance | Moderate | Excellent | Good | Outstanding |
| Cost | High | Very High | Moderate | High |
Comparison with PEEK
| Property | PPS | PEEK |
|---|---|---|
| Cost | Lower | |
| Chemical Resistance | Similar | |
| Heat Resistance | Slightly Lower | |
| Toughness | Lower | |
| Wear Resistance | Lower |
PPS offers an excellent cost-to-performance alternative to PEEK for many applications.
Available Surface Finishes
Standard Finishes
- Molded Finish
- Machined Finish
- Matte Finish
Functional Finishes
- Precision Ground Finish
- Wear Surface Finish
- Electrical Component Finish
Specialty Grades
- Virgin PPS
- Glass-Filled PPS
- Mineral-Filled PPS
- PTFE-Filled PPS
- Conductive PPS
Frequently Asked Questions (FAQ)
What is PPS?
PPS (Polyphenylene Sulfide) is a high-performance thermoplastic known for exceptional chemical resistance, heat resistance, dimensional stability, and flame retardancy.
What is PPS used for?
Typical applications include:
- Automotive Components
- Electrical Connectors
- Pump Parts
- Valve Components
- Semiconductor Equipment
Is PPS chemically resistant?
Yes. PPS offers outstanding resistance to fuels, solvents, acids, alkalis, and industrial chemicals.
Is PPS flame retardant?
Yes. PPS is inherently UL94 V-0 flame retardant without additives.
Can PPS be machined?
Yes. PPS offers excellent CNC machining performance and dimensional stability.
Why choose PPS?
Because it combines:
- Outstanding Chemical Resistance
- High Temperature Performance
- Excellent Dimensional Stability
- Flame Retardancy
- Electrical Insulation
What is the difference between PPS and PEEK?
PEEK offers higher toughness and wear resistance, while PPS provides lower cost and excellent chemical resistance.
Does GCNOV provide PPS manufacturing services?
Yes. GCNOV provides:
- PPS CNC Machining
- PPS Injection Molding
- Electrical Component Manufacturing
- Automotive Component Production
- Precision Industrial Parts
- Prototype Development
- Low-Volume Production
- Mass Production