Unfilled PI
A-PI-380
Color: Brownish-Red
Tg 380°C, plasma-resistant; offers excellent electrical insulation, high mechanical strength, and good machinability. Relatively lower toughness.
High-Performance Thermoset Polyimide (PI) Series
Explore our premium selection of thermoset polyimide materials—ranging from unfilled and wear-resistant to composite and functional ESD grades—precision-engineered to deliver exceptional thermal stability, mechanical strength, and reliable wear resistance in the most demanding industrial environments.
Unfilled PI
Unfilled PI
A-PI-350-A
Cross Ref: SP-1 Color: Brownish-Red
Classic unfilled grade with optimal comprehensive performance. Not recommended for high-temperature plasma environments above 220°C.
Unfilled PI
A-PI-330
Color: Brownish-Red
Features good toughness and plasma resistance. Glass transition temperature (Tg) is 330°C.
Unfilled PI
A-PI-5001
Cross Ref: SCP-5000 Color: Yellow
High hardness and high modulus combined with good toughness. Extremely wear-resistant with a continuous operating temperature around 350°C.
Unfilled PI
A-PI-480W
Cross Ref: SA101 Color: Yellowish-Brown
Ultra-high temperature resistance. Continuous operating temperature reaches up to 400°C+, featuring an extremely low coefficient of thermal expansion (CTE).
Unfilled PI
A-PI-6010
Cross Ref: P84-NT2 Color: Dark Maroon
Rockwell hardness HRE around 85 (standard unfilled is 45-50). Exceptional wear resistance, ideal for high-temperature friction applications where particle shedding is prohibited.
Wear-Resistant PI
A-PI-350-21
Cross Ref: SP-21 Color: Dark Green
Modified with 15% graphite. Offers good toughness, superior friction and wear properties, alongside excellent machinability.
Wear-Resistant PI
A-PI-380-21
Cross Ref: SP-21 Color: Dark Green
Modified with 15% graphite. Higher temperature resistance than 350-21. Outstanding anti-friction and wear performance under extreme conditions.
Wear-Resistant PI
A-PI-5050
Cross Ref: SP-22 / SCP-5050 Color: Black
Contains a high proportion (50%) of graphite with lower toughness. Specifically designed for extremely harsh conditions requiring self-lubrication and heat resistance.
Composite PI
A-PI-211
Cross Ref: SP-211 Color: Black
Composite modification with 15% graphite and 10% PTFE. Exhibits an extremely low friction coefficient and superior wear resistance.
Functional PI
A-PI-ESD
Cross Ref: SP-202 Color: Black
Anti-static (ESD) grade PI. Stable surface resistance between 10⁶-10⁹ Ω (customizable range) with good machinability.
Functional PI
A-PI-D
Cross Ref: SP-202 Color: Black
Conductive grade PI. Resistance ranges between 10³-10⁵ Ω. Commonly used for precision components requiring electrostatic discharge or electrical conductivity.
Need Custom Polyimide Solutions?
Connect with our engineering team for technical support, material selection, or to request a quote.
Contact UsAvailable Forms and Custom Machining Options
We supply thermoset polyimide in semi-finished stock shapes and custom-machined parts for high-temperature and precision applications.
Available Forms
Available forms include sheets, rods, tubes and custom machined components. Material dimensions and machinability can be matched to thermal, wear, insulation and dimensional stability requirements.
- Sheets / Plates
- Rods
- Tubes
- Compression Molded Blanks
- Precision Machined Parts
Machining Capabilities
Our team supports drawing review, material recommendation and machining planning for complex thermoset PI parts used in semiconductor, aerospace, vacuum and electrical systems.
- CNC Turning
- Milling
- Drilling
- Precision Finishing
- Tight-Tolerance Custom Parts
- Prototype & Low-Volume Production
Stock Dimensions
Max Sheet Size: 600 × 1000 mm
Thickness Range: 1.5 – 100 mm
Rod Diameter: Ø3 – Ø100 mm
Precision & Tolerance
Tolerance Capability: Up to ±0.01 mm (±0.0004 in)
Surface Finish: Ra 0.4 – 0.8 μm
High-precision CNC control
Delivery Lead Time
Prototype Lead Time: 3 – 5 Days
Production Lead Time: 2 – 3 Weeks
Fast-track options available
Drawing Formats Accepted
Supports .iges, .dxf, .dwg
Typical Thermoset PI Applications
Our materials are engineered not just as basic stock shapes, but as high-reliability solutions designed to overcome extreme engineering challenges in specialized industries.
Vacuum & Semiconductor Components
For vacuum fixtures, wafer handling components, insulating parts and low-outgassing environments where dimensional stability and thermal resistance are critical.
High-Temperature Wear Parts
For bushings, seal rings, bearing elements and dry-running friction components operating under elevated temperature and load conditions.
Electrical Insulation Parts
For coil bobbins, insulating rings, connector components and electrical assemblies requiring stable dielectric performance at high temperature.
Aerospace & Extreme Environment Parts
For structural support, insulation and specialty components exposed to high heat, aggressive duty cycles or demanding dimensional requirements.
Thermoset PI vs Other High-Performance Plastics
Material selection should be based on operating temperature, wear mode, dimensional tolerance, vacuum requirements, media exposure and part geometry. Each high-performance polymer offers distinct trade-offs depending on your specific engineering environment.
| Property / Selection Factor | Thermoset PI | Thermoplastic PI | PEEK | PAI |
|---|---|---|---|---|
| Continuous High-Temp Capability | High | Medium-High | Medium | High |
| Wear Resistance at Elevated Temp | High | Medium | Medium | High |
| Dimensional Stability | High | High | Medium | High |
| Vacuum / Low Outgassing Potential | High | Application-dep. | Application-dep. | Application-dep. |
| Machining of Parts | Good | Good | Good | Good |
| Availability as Stock Shapes | On request | Yes | Yes | Yes |
| Best-fit Applications | Vacuum, high-wear, and electrical insulation components in extreme heat environments. | Precision parts requiring higher impact toughness and elongation. | General engineering components requiring chemical resistance and wide stock availability. | High-temperature parts demanding high structural stiffness and heavy-load wear resistance. |
When to Select Thermoset PI
Thermoset PI is often selected when elevated-temperature dimensional stability, exceptional wear performance under dry-running conditions, and ultra-low outgassing in vacuum seals are more critical than melt processability or impact toughness.
Alternative Material Trade-offs
Choose Thermoplastic PI for parts needing higher tensile elongation; choose PEEK for superior chemical resistance and general engineering cost-efficiency; or choose PAI when maximum mechanical structural rigidity and high load capacity are required at high temperatures.
Frequently Asked Questions About Thermoset Polyimide
Find answers to common technical and procurement inquiries regarding our PI materials.
What is the difference between thermoset polyimide and thermoplastic polyimide?
Thermoset polyimide forms a crosslinked structure after curing and is typically selected for applications requiring very high thermal stability, dimensional retention and performance under demanding service conditions. Thermoplastic polyimide is generally chosen when melt processability or specific toughness requirements are more important.
Is thermoset PI suitable for continuous use above 250°C?
Thermoset PI is commonly considered for elevated-temperature environments. Actual long-term service capability depends on grade, part geometry, load, atmosphere and duty cycle. Project-specific review is recommended.
Can thermoset PI replace PEEK in high-temperature applications?
In some applications, yes. Thermoset PI may be considered when higher temperature stability, wear resistance or insulation performance is required. Final replacement decisions should be validated by operating conditions and part design.
Is your thermoset PI suitable for vacuum or semiconductor applications?
Material suitability for vacuum or semiconductor environments depends on outgassing expectations, cleanliness, geometry and process conditions. Please send your application details for evaluation.
What forms are available?
Thermoset PI can be supplied as stock shapes such as sheet, rod and other semi-finished forms, as well as custom machined parts depending on project requirements.
Can you machine custom thermoset PI parts from drawings?
Yes. Drawing review support can be provided for custom thermoset PI parts used in insulation, wear, vacuum and precision applications.
What tolerances can you achieve?
Tolerance capability depends on part geometry, size, wall thickness and machining complexity. Please share your drawing or tolerance requirements for assessment.
Can you provide TDS or inspection documents?
Technical data and project-related inspection documentation can be discussed based on the material grade and application requirements.
Why Partner With Us?
From high-performance polymer synthesis to ultra-precision finished components, we deliver uncompromising quality for critical operating environments.
Material-to-Part Integration
Eliminate multi-vendor risks. We seamlessly manage the entire chain from high-purity stock shape manufacturing to custom final part delivery.
Advanced Multi-Axis Machining
Equipped with high-precision CNC machining centers to comfortably achieve tight tolerances up to ±0.01 mm (±0.0004 in) for complex geometries.
Expert Engineering Review
Our team provides complimentary drawing reviews and customized material recommendations specific to your vacuum, thermal, or wear applications.
Take the Next Step with Your Project
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