Polyimide Articles
Model:Polyimide Article
Kaxite polyimide (PI) articles are solid amber translucent or deep brown material with good mechanical strength and superior resistance to high temperature and radiation. Continuous working temperature 250 °C. Density 1.36–1.37, flexural strength 1660 kg/cm², compressive strength > 155 kg·cm/cm², friction factor 0.24, hardness HB 23, PV value 20–30 m·kg/mm²·S. Available as thin film, reinforced plastic molded parts, high-vacuum self-lubricating bearings, high-temperature electrical parts and radiation-resistant components. When blended with PTFE and graphite, polyimide serves as an oilless lubricating material for high-speed compressors — piston rings, seal rings and axle rims. Bulk supply, custom fabrication, OEM branding. Free sample for qualified buyers, factory-direct price, quote within 24 hours.
Polyimide (PI) · Heat & Radiation Resistant Engineering Plastic
Polyimide Articles — Heat & Radiation Resistant PI Parts for Bearings, Films & Electrical Insulation, Bulk Supplier
Kaxite polyimide (PI) articles are solid amber translucent or deep brown material with good mechanical intensity and superior resistance to high temperature and radiation. Continuous working temperature 250 °C. Density 1.36–1.37, flexural strength 1660 kg/cm², compressive strength > 155 kg·cm/cm², friction factor 0.24, hardness HB 23, PV value 20–30 m·kg/mm²·S. Available as thin film, reinforced plastic molding articles, high-vacuum self-lubricating bearings, high-temperature electrical parts and radiation-resistant components. When blended with PTFE and graphite, polyimide becomes an oilless lubricating material for high-speed compressors — piston rings, seal rings and axle rims. Bulk supply, custom fabrication, OEM branding. Free sample for qualified buyers, factory-direct price, quote within 24 hours.
High Temperature Resistance 250 °C
Continuous Working Temperature
Polyimide keeps its mechanical strength and dimensional stability at continuous 250 °C — a temperature that would degrade most engineering plastics. Heat setting temperature 232 °C at 18.5 kg/cm².
Radiation Resistance PI Class
Superior Radiation Tolerance
Polyimide articles resist radiation damage far better than PTFE, nylon or acetal. That makes them the standard choice for radiation-exposed articles in nuclear, medical and aerospace equipment.
Mechanical & Tribological Performance
Property Dashboard
Flexural Strength
1660 kg/cm²
Compressive Strength
> 155 kg·cm/cm²
Friction Factor
0.24
Hardness (HB)
23
PV Value
20–30 m·kg/mm²·S
Density
1.36–1.37
Full Specification — Polyimide Articles
Data Sheet| Parameter | Value | Notes |
|---|---|---|
| Material | Polyimide (PI) | Amber translucent or deep brown solid |
| Continuous working temperature | 250 °C | High-temperature resistance |
| Heat setting temperature | 232 °C at 18.5 kg/cm² | Post-processing reference |
| Density (proportion) | 1.36 – 1.37 | Standard |
| Flexural strength | 1660 kg/cm² | Bending point |
| Compressive strength | > 155 kg·cm/cm² | Crush strength |
| Friction factor | 0.24 | Noumenon (self-lubricating) |
| Hardness | HB 23 | Brinell |
| PV value | 20 – 30 m·kg/mm²·S | Bearing design reference |
| Radiation resistance | Superior | Compared with PTFE, nylon, acetal |
| Available forms | Thin film, reinforced plastic molding, rod, tube, custom parts | Send drawing for custom fabrication |
| Compound option | PTFE + graphite filled polyimide | Oilless lubricating material for high-speed compressors |
| Customization | Size, shape, compound, OEM branding | Send drawing or specification |
| Quotation basis | Shape, size, quantity, compound requirement, destination port | Reply within 24 hours |
Where Polyimide Articles Are Used
Application Map
01
Thin Film
High-temperature thin film for flexible printed circuits, motor slot liners and electrical insulation in heat-exposed environments.
02
High-Vacuum Bearings
Self-lubricating bearings that keep working in high vacuum where oil-based lubrication cannot be used. PV value 20–30 m·kg/mm²·S.
03
Electrical Insulation
Dielectric materials for plugs, sockets, skeletons and wire racks of electrical appliances, rated to 250 °C continuous.
04
Radiation-Exposed Parts
Radiation-resistant articles for nuclear, medical imaging and aerospace equipment where standard plastics degrade.
Reinforced Plastic Molding
Reinforced plastic molding articles with high mechanical intensity, for structural parts where high strength and heat resistance are both required.
PTFE + Graphite Filled PI
When blended with a moderate amount of PTFE and graphite, polyimide becomes an oilless lubricating material for high-speed compressors — piston rings, seal rings and axle rims.
Custom Fabrication
Rods, tubes, sheets and machined parts to your drawing. Send the size, shape and compound requirement for a factory-direct quote.
For related engineering plastic parts, see PTFE Parts, PTFE Rods and PTFE Tube. For PTFE heat exchangers used in aggressive chemical service, see PTFE Heat Exchanger. For the wider engineering plastic range, browse PTFE Products.
Frequently Asked Questions
Buyer Q&AWhat are Polyimide Articles?
Polyimide (PI) articles are solid engineering plastic parts made from polyimide resin. They have an amber translucent or deep brown colour, good mechanical intensity and superior resistance to high temperature (continuous working temperature 250 °C) and radiation. They are used as thin film, reinforced plastic molded parts, high-vacuum self-lubricating bearings, high-temperature electrical parts and radiation-resistant components.
What temperature can polyimide articles withstand?
Continuous working temperature is 250 °C. Heat setting temperature is 232 °C at 18.5 kg/cm². Polyimide keeps its mechanical strength and dimensional stability at these temperatures — a level that would degrade most other engineering plastics.
What mechanical properties does polyimide have?
Density 1.36–1.37. Flexural strength 1660 kg/cm². Compressive strength > 155 kg·cm/cm². Friction factor 0.24 (noumenon). Hardness HB 23. PV value 20–30 m·kg/mm²·S. These values make polyimide suitable for both structural parts and self-lubricating bearings.
Why is polyimide used for high-vacuum bearings?
Polyimide has a low friction factor of 0.24, a good PV value, and good mechanical strength at high temperature. It can operate without oil-based lubrication, which is essential in high-vacuum environments where oil would evaporate and contaminate the vacuum. When filled with PTFE and graphite, it becomes an oilless lubricating material for high-speed compressors — piston rings, seal rings and axle rims.
What is the radiation resistance of polyimide?
Polyimide has superior radiation resistance compared with most other engineering plastics. This makes it the preferred choice for radiation-exposed parts in nuclear, medical imaging and aerospace equipment. Send your radiation exposure requirement and Kaxite will confirm the suitable grade.
What forms and sizes are available?
Standard supply includes thin film, reinforced plastic molding articles, rods, tubes and custom machined parts. Sizes are made to your drawing or specification. Send the dimensions, quantity and compound requirement for a factory-direct quote.
Can I get a free sample before ordering?
Yes. A free sample of the standard polyimide material is available for qualified buyers so you can test the mechanical strength, temperature resistance and machining behaviour before placing a production order.
How do I request a quotation?
Send your required shape (film, rod, tube, molded part), size or drawing, quantity, compound requirement (plain PI or PTFE + graphite filled) and destination port. Kaxite replies within 24 hours with a factory-direct quotation, lead time and packing details.
Need a factory price for polyimide (PI) articles? Send your drawing or specification — Kaxite replies within 24 hours with a factory-direct quotation, free sample offer for qualified buyers, and recommended compound (plain PI or PTFE + graphite filled).
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Contact Info
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Address
No. 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China
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