How Can We Support Your Next Project?
Need help selecting the right modified PI grade?
Tell us your operating temperature, load, friction condition, insulation or ESD requirement, and part geometry. Our team can recommend a suitable grade based on your application.
Need stock shapes or finished parts?
We can supply modified PI in standard stock shapes or produce machined parts according to drawings for seals, bushings, bearings, fixtures and other critical components.
Need faster RFQ evaluation?
Send your drawing, required quantity, working condition and destination country to receive a faster quotation and feasibility review.
What Is Modified Polyimide?
Modified polyimide is a high-performance PI material enhanced with selected fillers or functional modifications to improve wear resistance, friction behavior, load capacity, conductivity, anti-static performance, thermal stability or machinability for specific service conditions. Compared with unfilled PI, modified grades are often chosen when the application requires more targeted performance in sliding, sealing, insulating or ESD-sensitive environments.
At Dalian Allstar Material , we provide modified PI materials for demanding applications in semiconductor, aerospace, electronics, automotive, machinery and high-temperature industrial systems. Depending on the working condition, we can recommend graphite-filled, PTFE-filled, conductive, anti-static or carbon-fiber-reinforced PI grades in stock shapes or custom-machined components.
Available Modified PI Grades
Not sure which grade fits your application?Send your working temperature, mating material, load, speed and drawing for selection support.
| Grade | Cross Reference | Type / Functional Direction | Key Advantages | Typical Applications | Available Form | Action |
|---|---|---|---|---|---|---|
| A-PI-350-21 | SP-21 | Wear-resistant modified PI | Low friction, improved wear resistance, high-temperature performance | Seal rings, valve seats, bushings, bearings | Sheet / Rod / Machined Parts | Request TDS |
| A-PI-211 | SP-211 | Low-friction modified PI | Good wear resistance, mechanical strength, low water absorption, machinability | Dynamic seals, oil-free bearings, sliding parts | Rod / Sheet / Machined Parts | Ask Recommendation |
| A-PI-5050 | SP-22 / SCP-5050 | High-temp wear-resistant PI | Thermal stability, dimensional reliability, durability under repeated motion | Actuators, pushers, extractors, thermal process parts | Rod / Machined Parts | Get a Quote |
| A-PI-MS | – | General wear-resistant PI | Balanced tribological and structural performance | Transmission parts, seals, gaskets | Sheet / Rod / Parts | Send Drawing |
| A-PI-D | SP-202 | Conductive PI | Static dissipation / conductivity for sensitive environments | Semiconductor fixtures, test tools, ESD-sensitive parts | Sheet / Rod / Parts | Request Specs |
| A-PI-F | SP-202 | Anti-static PI | Electrostatic control with insulation-related use scenarios | Electronic handling parts, insulating support parts | Sheet / Rod / Parts | Ask an Engineer |
| A-PI-3S | – | Functional filled PI | Improves wear resistance and toughness in specialized applications | Friction-related industrial applications | Resin / Custom Use | Discuss Application |
Technical Properties of Modified PI Materials
Exact values vary by grade, filler system and part geometry. Contact us for the latest TDS or grade-specific test data.
| Property | A-PI-350-21 | A-PI-211 | A-PI-5050 | A-PI-D | A-PI-F |
|---|---|---|---|---|---|
| Coefficient of Friction (2h) | 0.19 | 0.21 | 0.15 | 0.24 | 0.24 |
| Compressive Strength (10% Def, MPa) | 159 | – | 146 | 118 | 134 |
| Flexural Strength (23°C, MPa) | 137 | 110 | 90 | 123 | 133 |
| Water Absorption (24h, %) | 0.09 | – | 0.04 | 0.11 | 0.11 |
| Volume Resistivity | – | – | – | – | – |
| Surface Resistivity (Ω) | – | – | – | 10³-10⁵ | 10⁶-10⁹ |
| Recommended Use | Insulation gaskets, valve seats, seals | Dynamic seals, oil-free bearings | Hot glass grippers, push rods | Conductive precision parts | Anti-static precision parts |
Need grade-specific data?
Request the technical data sheet or tell us your application for recommendation.
Graphite Filled vs PTFE Filled vs Conductive vs Anti-Static PI
Different modified PI grades are designed for different engineering priorities. Graphite-filled grades are commonly selected for improved wear resistance and lower friction in sliding applications. PTFE-modified grades are often used where reduced stick-slip behavior and smoother dry-running performance are important. Conductive PI grades are used when static discharge or conductivity control is required, while anti-static grades are suitable for environments where electrostatic buildup must be managed without relying on standard insulating materials alone.
If you are replacing metal, PEEK, PAI or unfilled PI, the correct choice depends on temperature, load, speed, humidity, electrical requirement and part geometry. Instead of selecting by material name only, it is better to choose the grade based on the actual operating condition.
Not sure which to choose?
Tell us your application and we will recommend a suitable modified PI grade.
Typical Applications of Modified Polyimide Materials
For Bearings, Bushings and Sliding Parts
Modified PI grades with low-friction and wear-resistant performance are suitable for dry-running or high-temperature sliding applications where long service life and dimensional stability are required.
For Seals, Valve Seats and Compressor Components
Modified PI is widely used for sealing and wear parts that operate under heat, pressure or repeated motion, especially when lower friction and reliable structural performance are important.
For Semiconductor and Electronics Fixtures
Conductive and anti-static PI grades are used in ESD-sensitive environments for fixtures, insulating supports, chip testing tools and other precision handling components.
For Aerospace and High-Temperature Systems
Modified PI can be selected for lightweight, high-temperature and dimensionally stable parts used in demanding thermal or mechanical conditions.
For Custom Machined Industrial Parts
Peek Sources can provide stock shapes or finished parts based on drawings for industrial applications requiring thermal resistance, electrical function or tribological performance.Available Forms and Machining Capability
We supply modified PI materials in multiple forms to match different sourcing and production needs. Standard options include sheet, rod and tube, while custom-machined parts can be produced based on drawings or samples.
Our support can cover material recommendation, stock shape selection, prototype evaluation and finished-part machining for industrial components such as seal rings, bushings, valve seats, insulating parts, semiconductor fixtures and high-temperature wear components.
Available Forms
- Sheet / Plate (Thick: 0.5-100mm)
- Rod (Dia: Φ1-200mm)
- Tube (OD: 23-450mm, ID: 12-400mm)
- Ring / Bushing (Custom sizes)
- Custom Machined Parts Up to ±0.003mm
Support Options
- Material selection support
- Drawing-based quotation
- Prototype and batch production
- Export packaging and delivery
Why Source Modified PI from Dalian Allstar Material
Dalian Allstar Material focuses on high-performance engineering plastics for demanding industrial applications. We help customers choose the right modified PI grade based on service condition, not just generic material naming.
Whether you need low-friction wear parts, conductive semiconductor components, anti-static insulating parts or high-temperature structural materials, we can support your project with stock shapes, machining options and application-based quotation.
If your project is still at the evaluation stage, you can send us your drawing, target quantity and operating condition for a faster recommendation.
Our Core Advantages
Engineering support
TDS available
Custom machining
Prototype support
Global supply
Frequently Asked Questions About Modified Polyimide
What is modified polyimide?
Modified polyimide is PI material enhanced with fillers or functional adjustments to improve properties such as wear resistance, low friction behavior, conductivity, anti-static performance, thermal stability or processability for specific industrial applications.
What is the difference between modified PI and pure PI?
Pure PI offers excellent thermal and mechanical performance, while modified PI is designed to deliver more targeted performance for special conditions such as dry running, ESD control, lower friction or improved dimensional stability in actual service environments.
What fillers are commonly used in modified PI?
Depending on the grade and application target, modified PI may include graphite, PTFE, conductive additives, anti-static systems, carbon fiber or other functional reinforcement materials.
Which modified PI grade is best for wear-resistant applications?
The best grade depends on temperature, load, speed, mating material and service environment. Wear-resistant applications often use graphite-filled or other low-friction modified PI grades, but grade selection should be based on the actual operating condition.
Do you offer conductive and anti-static PI grades?
Yes. We offer conductive and anti-static modified PI grades for semiconductor, electronics and other ESD-sensitive applications.
What forms are available?
Modified PI can be supplied as sheet, rod, tube and custom-machined parts depending on the grade and project requirement.
Can you machine parts based on drawings?
Yes. We can provide machining support for qualified projects based on drawings, dimensions and application requirements.
Can modified PI replace PEEK, PAI or metal parts?
In some high-temperature, wear-related or electrically sensitive applications, modified PI may be considered as an alternative. Suitability depends on the exact working condition and performance target.
Do you provide TDS or test data?
Yes. Technical data sheets and grade-specific information can be provided upon request.
What information is needed for faster quotation and grade selection?
Please send the application, operating temperature, load, friction condition, electrical requirement, required form, quantity, drawing if available, and delivery destination.
Request a Quote or Material Recommendation
Not sure which modified PI grade you need? Send us your working condition or drawing. We can help recommend a suitable grade for your application.
For faster support, please include operating temperature, part function, quantity and drawing if available.