Pure PI Polyimide Rods, Sheets & Custom Machined Parts

Pure Polyimide (PI) is an unfilled, high-performance polymer synthesized from diamines and dianhydrides. Manufactured from powder resin through molding and high-temperature sintering, it delivers exceptional thermal resistance, mechanical strength, electrical insulation, and dimensional stability, making it ideal for extreme operating environments.

Forms: Rods / Sheets / Tubes / Machined Parts
Temp Resistance: Continuous use up to 250–300°C
Key Industries: Vacuum / Semiconductor / Aerospace / Electrical Insulation
Services: CNC machining to drawing / Custom size / Small-batch sampling

Virgin PI (Polyimide) Product Selection Guide

Main Grade	Cross-Reference	Color	Material Type	Key Features & Advantages
A-PI-380	SP-1	Reddish Brown	Thermoset	Glass transition temperature (Tg) of 380°C. Excellent resistance to plasma environments. High electrical insulation and mechanical strength, with good machinability (toughness is relatively lower).
A-PI-350-A		Reddish Brown	Thermoset	Classic pure grade with optimal comprehensive performance. (Note: Not recommended for use in high-temperature plasma environments exceeding 220°C.)
A-PI-330		Reddish Brown	Thermoset	Superior toughness, excellent plasma resistance, with a Tg of 330°C.
A-PI-5001	SCP-5000	Yellow	Thermoset	High hardness and high modulus combined with excellent toughness. Outstanding wear resistance with a continuous service temperature of around 350°C.
A-PI-480W	SA101	Amber / Tan	Thermoset	Ultra-high temperature resistance (continuous service temperature up to 400°C and above), featuring an extremely low coefficient of thermal expansion (CTE).
A-PI-280	PAI 4203	Yellow	Thermoplastic (PAI)	Mainly used to replace imported PAI 4203. Compared to traditional PAI, it delivers superior temperature resistance, lower water absorption, and higher tensile strength with excellent cost performance.
A-PI-6010	P84-NT2	Dark Maroon	Thermoset	With a hardness of 85 HRE, this material offers excellent rigidity and wear resistance. It performs stably in high-temperature and high-friction conditions. Thanks to its self-lubricating nature, it generates no dust or particles, making it the perfect alternative to metals for strict cleanroom applications.

Facing Bottlenecks in High-Temp Resistance or Precision Machining?

Whether you need material validation for harsh environments or custom machining for non-standard sizes, our material experts are here to support you with highly competitive factory pricing.

✓ Detailed Pure PI Technical Data Sheets (TDS) & Machining Guides
✓ Inventory Check for Non-Standard Sizes & Custom Rods/Plates

Your Trusted Pure PI Precision Machining Partner from China

As a professional manufacturer in the field of high-performance engineering plastics, Dalian Allstar Material Co., Ltd. possesses significant advantages in the precision machining of Pure PI (Pure Polyimide), aiming to provide exceptional value to global customers, including wholesale options.

Integrated Solution

From the supply of Pure PI raw materials (sheets, rods) from our factory to the custom machining of precision components, we offer a complete service chain. Customer procurement processes are simplified, and consistency between material and machining is guaranteed.

Specialized Processing

We have a deep understanding of Pure PI’s unique machining challenges (e.g., material hardness, susceptibility to chipping) and optimized processing techniques. This ensures precise tolerances and high-quality surface finishes, including the exterior of parts.

Advanced Equipment

Our company is equipped with precision CNC machine tools, injection molding machines, lathes, and auxiliary equipment suitable for processing high-performance polymers. This allows us to meet complex geometric shapes and stringent design requirements.

Rigorous Quality Control

Over 20 inspection instruments are used for final inspection. From raw materials to finished products, quality at every stage is strictly controlled to ensure parts meet drawing specifications and performance requirements.

Application Experience

Our experience serving demanding industries such as nuclear power, military, automotive, and electronics has provided us with a profound understanding of Pure PI’s performance and machining considerations in specific applications.

Customization Capability

Whether for small-batch prototype production or large-scale manufacture orders, our flexible production capacity can meet the customized needs of different customers.

Choosing Allstar Material for Pure PI component machining means choosing reliability, precision, and professionalism. We are committed to being your long-term, trustworthy partner in demanding engineering plastics applications. Contact

Applications

Applications of Pure PI in Various Industries

Pure PI is widely used in aerospace, electronics, automotive, nuclear, and semiconductor industries for its high heat resistance, electrical insulation, chemical stability, and low outgassing properties, ensuring reliable performance in extreme environments.

Aerospace

Critical structural parts, high-temperature resistant components.

Semiconductor Industry

Wafer chucks, vacuum suction cups, insulation parts.

Nuclear Power

Special cable insulation layers, radiation-resistant components.

Precision Machinery

Sliding bearings, bushings, sealing rings.

Electric Vehicles

High-voltage insulation components, motor insulation paper.

Vacuum Equipment

Low-outgassing components, seals.

Others

Demanding coil bobbins, thermal insulation gaskets.

Available Shapes & Sizes from Dalian Allstar Material

Pure PI Rod

High-density molded or extruded rods engineered for excellent structural uniformity. Ideal for high-precision machining of rollers, pins, and electrical insulators.

Available Range: Ø 3.0 mm – 150.0 mm

Notes: Standard Length 300/1000 mm; Custom lengths available.

Pure PI Sheet / Plate

Stress-relieved polyimide plates featuring superior flatness and minimal thermal deformation. Widely specified for semiconductor test nests and wear strips.

Available Range: Thickness: 2.0 mm – 50.0 mm

Notes: Standard 300×300 / 500×500 mm; Custom cut-to-size service.

Pure PI Tube

Heavy-wall and thin-wall tubes optimized for concentricity and mechanical load resistance. Perfect for custom valve seats, bearings, and aerospace bushings.

Available Range: OD: 10.0–200.0 mm | ID: 5.0–180.0 mm

Notes: Standard Length 300/1000 mm; Molded or extruded by size.

Custom Machined Parts

Fully finished, complex components built precisely to your technical prints. Utilizing advanced CNC machining to deliver ultra-tight tolerances up to ±0.02 mm.

Available Range: Customized to print (OEM/ODM)

Notes: Advanced CNC turning & milling; 100% tolerance inspection.

Frequently Asked Questions

Pure Polyimide (PI) offers exceptional thermal stability. It can withstand continuous operating temperatures up to 300°C (572°F) and handle short-term temperature spikes of up to 400°C (752°F) without melting or losing its mechanical integrity.

While both are top-tier high-performance polymers, Pure PI outperforms PEEK in extreme heat. PI maintains its dimensional stability and mechanical strength at temperatures where PEEK begins to soften (above 250°C). However, PI is typically compression-molded rather than melt-processed.

Absolutely. Pure PI has outstanding dimensional stability and does not creep easily, making it highly suitable for precision CNC machining. We can supply standard shapes or offer machining guidelines to help you achieve tight tolerances.

Due to its high strength and toughness, we recommend using carbide or diamond-tipped tools when machining Pure PI to ensure smooth surface finishes and minimize tool wear. Adequate coolant is also advised for deep drilling operations.

Yes. In addition to our standard inventory, we provide custom-cut sizes for Pure PI rods, tubes, and plates. This helps you minimize material waste and reduce your overall machining costs.

Yes, we provide full transparency for engineering validation. Detailed Technical Data Sheets (TDS), RoHS compliance certificates, and material test reports are available upon request with your order.

For standard stock dimensions, orders are typically dispatched within 3 to 5 business days. Custom dimensions or large-volume production runs usually require a lead time of 2 to 3 weeks. Contact us for precise scheduling based on your project.

We understand that high-performance polymers are often needed for R&D and prototyping before mass production. Therefore, we offer flexible MOQs to support both your initial testing phases and full-scale commercial manufacturing.

Contact Our Material Experts

Get professional technical support, custom dimensions validation, and factory-direct quotes for your high-performance polymer project. 📩 Send a Message Directly

Why Partner with Us?

Technical Validation Support Get comprehensive Technical Data Sheets (TDS), machining guides, and selection assistance for extreme environments.
Custom Dimensions & Processing We provide precision-cut rods, tubes, plates, and customized profiles to minimize material waste.
Reliable Global Supply Chain Flexible MOQs to support early-stage prototyping through to full-scale commercial manufacturing with clear lead times.

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Operational Headquarters

Dalian, Liaoning Province, China

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