Shenzhen Forbest offers precision polyimide tubing manufactured from polyimide resin. Thin-wall construction delivers thermal stability, dielectric strength, and chemical resistance in a lightweight package. For applications where space is limited and reliability matters.
Made from aromatic polyimide resin, this tubing holds its properties across a temperature range that covers both liquid helium (-269°C) and continuous 260°C exposure. Brief spikes to 400°C? It handles those too.
The thin wall is what catches most engineers off guard. You get reliable electrical insulation without adding bulk. When you’re working with tight wire bundles, miniaturized components, or weight-sensitive assemblies, that matters.
As a polyimide tube China supplier, Shenzhen Forbest manufactures to tight tolerances. Aerospace, semiconductor, medical device, and high-performance electronics industries all use our tubing. Clean manufacturing means consistent product, spool after spool.
Dimensions & Availability
Common sizes in stock. Custom dimensions available.
| Inside Diameter (mm) | Inside Diameter (inch) | Wall Thickness (mm) | Length |
|---|---|---|---|
| 0.30 ± 0.02 | 0.012 | 0.025 ± 0.002 | 100 m / spool |
| 0.50 ± 0.03 | 0.020 | 0.025 ± 0.002 | 100 m / spool |
| 0.80 ± 0.03 | 0.031 | 0.025 ± 0.002 | 100 m / spool |
| 1.00 ± 0.05 | 0.039 | 0.025 ± 0.002 | 100 m / spool |
| 1.50 ± 0.05 | 0.059 | 0.038 ± 0.003 | 50 m / spool |
| 2.00 ± 0.05 | 0.079 | 0.038 ± 0.003 | 50 m / spool |
| 2.50 ± 0.05 | 0.098 | 0.038 ± 0.003 | 50 m / spool |
| 3.00 ± 0.05 | 0.118 | 0.050 ± 0.005 | 30 m / spool |
| 4.00 ± 0.08 | 0.157 | 0.050 ± 0.005 | 30 m / spool |
| 5.00 ± 0.08 | 0.197 | 0.050 ± 0.005 | 30 m / spool |
| 6.00 ± 0.08 | 0.236 | 0.064 ± 0.005 | 20 m / spool |
| 8.00 ± 0.10 | 0.315 | 0.064 ± 0.005 | 20 m / spool |
| 10.00 ± 0.10 | 0.394 | 0.076 ± 0.005 | 15 m / spool |
| 12.00 ± 0.15 | 0.472 | 0.076 ± 0.005 | 15 m / spool |
| 15.00 ± 0.15 | 0.591 | 0.089 ± 0.008 | 10 m / spool |
Notes:
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Custom IDs available from 0.20 mm to 30 mm
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Wall options: 0.0125 mm to 0.250 mm
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Cut lengths available
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Production quantities get larger spools
Polyimide vs. Other Materials
| Property | Forbest Polyimide | PTFE | PEEK | Polyester |
|---|---|---|---|---|
| Max Continuous Temp | 260°C | 260°C | 250°C | 155°C |
| Min Continuous Temp | -269°C | -200°C | -60°C | -55°C |
| Tensile Strength | ≥120 MPa | 20-35 MPa | 90-100 MPa | 150-200 MPa |
| Dielectric Strength | High (thin wall) | High | Medium-High | Medium-High |
| Radiation Resistance | Excellent | Poor | Good | Fair |
| Chemical Resistance | Excellent (most) | Excellent (all) | Excellent | Good |
| Flexibility | Flexible | Flexible | Semi-rigid | Flexible |
| Min Wall Thickness | 0.0125 mm | 0.025 mm | Thicker | Thin |
| Cut-Through Resistance | Excellent | Poor | Good | Good |
| Cost | Medium-High | Medium | High | Low |
Polyimide works best when:
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You’re tight on space. Ultra-thin walls save room while maintaining insulation.
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Temperatures swing wildly. It stays flexible at -269°C and stable at 260°C.
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Radiation is present. Gamma, X-ray, electron beam—polyimide handles it.
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Weight matters. Aerospace and medical applications benefit.
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You need precision. Tight tolerances hold.
Key Features
Temperature Range
From liquid helium (-269°C) to continuous 260°C. Other materials fail. Polyimide keeps working.
Thin Walls
0.0125 mm to 0.250 mm. Electrical insulation without the bulk. In tight spaces, every tenth of a millimeter counts.
Dielectric Strength
A 0.025 mm wall handles over 2 kV. Thicker walls handle more. Reliable insulation in minimal thickness.
Chemical Resistance
Resists hydrocarbons, solvents, dilute acids. Jet fuel, hydraulic fluids, cleaning agents—polyimide stands up to them.
Radiation Resistance
Gamma sterilization, nuclear environments, space radiation. Polyimide survives what kills other polymers.
Flame Retardance
UL94 V-0. Doesn’t support combustion. Chars but doesn’t drip or propagate flame.
Dimensional Stability
Low thermal expansion. The fit stays tight whether it’s cold or hot.
Applications
Aerospace & Defense
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Wire harness insulation
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Sensor sleeving
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Weight reduction in flight controls
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MIL-spec wiring protection
Medical Devices
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Catheter reinforcement
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Electrophysiology device insulation
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Guide wire coatings
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Implantable insulation (biocompatible grades available)
Electronics & Semiconductors
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Transformer insulation
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Battery cell separation
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Sensor wire protection
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High-temperature cable wrap
Automotive & Motorsport
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Engine bay wiring
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Transmission sensor leads
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EV battery wiring
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High-temperature fluid systems
Industrial
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Heating element insulation
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Thermocouple lead protection
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Furnace wiring
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Downhole sensor cables
Research
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Cryogenic experiments
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High-vacuum feedthroughs
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Radiation test fixtures
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Precision instrumentation
Why Shenzhen Forbest?
Factory Direct
We control raw material to final spooling. Consistent quality. Traceable lots. No middlemen marking up material that passed through three warehouses.
Tight Tolerances
Our processes hold dimensional control. When you order 0.50 mm ID ±0.02 mm, that’s what arrives.
Material Traceability
Every batch comes with documentation linking back to raw material lots. Full certification available.
Clean Manufacturing
Controlled environment prevents contamination. Medical and semiconductor applications? We can do cleanroom processing.
Flexible Quantities
Need 10 meters for prototyping? Fine. Running 10,000 meters for production? Also fine. No minimum order constraints.
Technical Support
Questions about material selection or tolerances? Our team has decades in high-performance polymers. We help you get the right product.
Global Shipping
We ship worldwide from Shenzhen. Standard sizes go out in 24-48 hours. Custom orders get realistic lead times.
Ordering
To order, specify:
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Inside diameter (mm or inch)
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Wall thickness (mm or inch)
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Length per piece or total quantity
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Packaging preference (spools, cut lengths, coils)
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Special requirements (biocompatible grade, cleanroom packaging, custom marking)