In demanding sectors such as aerospace, nuclear power, semiconductors, quantum technology, and ultra-high vacuum applications, traditional wrapped PI (polyimide) cables have increasingly revealed shortcomings—including poor airtightness, susceptibility to cracking, excessive weight, and inconsistent quality. In contrast, extruded PI cables, manufactured via an integrated molding process, are becoming the preferred transmission solution for extreme environments.
Extruded PI vs. Traditional Wrapped PI: Key Differences
Traditional PI cables typically rely on a film-wrapping and high-temperature sintering process, resulting in gaps, interfaces, and structural weak points between layers. Extruded PI cables, however, are produced through integrated melt extrusion; the resulting insulation layer is seamless, dense, uniform, and continuous, fundamentally eliminating the defects inherent in the wrapping process.
5 Key Reasons to Choose Extruded PI Cables
1
Extreme Temperature Range: Stable Performance from Liquid Helium to High Heat
Extruded PI cables operate reliably over a long-term range of -269°C (liquid helium/4K) to 300°C, with the ability to withstand even higher temperatures for short periods. Whether used in satellites and space stations, liquid nitrogen/LNG storage tanks, liquid helium superconducting equipment, or aerospace engine compartments and high-temperature furnaces, the insulation and sheath remain intact—resisting embrittlement, softening, cracking, and dielectric breakdown—with zero performance drift. Multiple TST extruded PI cable models have been field-tested in liquid helium and liquid nitrogen environments, proving their stability for cryogenic engineering equipment.
2
Superior Nuclear Radiation Resistance: The Standard for Nuclear Power, Aerospace, and Particle Accelerators
Capable of withstanding a radiation dose of 1×10⁹ rad; following alpha/gamma ray exposure:
The insulation and sheath do not crack.
Tensile strength variation remains within ±15%. This fully meets the long-term safety requirements for Class 1E nuclear power applications, high-radiation aerospace environments, and particle accelerators—far outperforming standard cables and wrapped PI cables. 3
Ultra-High Vacuum (UHV) Compatible: The Top Choice for Semiconductor, Quantum, and Scientific Research Clean Environments
Meets 10⁻¹² mbar UHV requirements and passes rigorous ASTM E595 testing:
Total Mass Loss (TML) < 0.8%
Collected Volatile Condensable Material (CVCM) < 0.1%
Free from plasticizers, additives, and standard colorants; ensures no chamber contamination, coating interference, or signal disruption. It is the standard cabling choice for semiconductor etching, vacuum chambers, quantum experiments, and surface science applications.
TST Cable’s UHV series extruded PI cables are specifically developed for UHV clean environments, featuring controllable and compliant outgassing specifications.
4
Lightweight & Compact: Essential for Aerospace, Automotive, and Airborne Applications
Compared to traditional wrapped PI cables:
Weight reduced by approximately 15%
Outer diameter reduced by 5%–10%
Smoother surface and higher voltage withstand capability. Ideal for spacecraft, drones, new energy vehicle drive motors, and airborne equipment, offering both weight reduction/efficiency gains and space savings in wiring.
TST Cable’s lightweight aerospace PI wires are standardized according to GJB773A, meeting the weight-reduction needs of aerospace and airborne systems.
5
Superior Mechanical & Electrical Performance: Longer Lifespan and Higher Reliability
Abrasion resistance ≥ 20,000 cycles; resistant to bending and friction
Mechanical strength > 80 MPa; tear and creep resistant
Insulation resistance > 1 × 10¹⁶ Ω·cm; stable signal transmission
Higher Partial Discharge Inception Voltage (PDIV); suitable for high-voltage, high-frequency, and variable-frequency systems. Integrally molded structure—no delamination, bubbles, or pinholes—resulting in a long-term operational failure rate far lower than that of wrapped cables.
Compliance and Certification: The “Entry Ticket” for High-End Projects
TST Cable’s extruded PI cables meet multiple rigorous standards, directly facilitating market entry and mass delivery for high-end projects. EN45545-2 HL3 (Railway rolling stock fire safety)
GJB773A (Aerospace military standard)
ISO9001 & GJB9001C (Military-grade quality management systems)
CCS (China Classification Society) & CRCC (Railway Product Certification)
Low-smoke, zero-halogen, and non-toxic; suitable for nuclear power, marine vessels, and enclosed aerospace environments.
Extruded PI cables are essential for these applications:
Aerospace: Satellites, space stations, aircraft, airborne instrumentation, and motor windings
Cryogenic Engineering: Liquid helium (4K), liquid nitrogen (77K), LNG carriers, and superconducting power systems
Nuclear Power/Industry: Inside and outside containment structures, radiation monitoring, instrumentation & control, and Class 1E equipment
Ultra-high Vacuum: Semiconductors, particle accelerators, quantum technology, and surface science
High-end Equipment: New energy vehicle motors, rail transit traction systems, submersible motors, and medical detection equipment
Specialized Industry: High-temperature, high-radiation, high-vacuum, high-vibration, and high-friction environments
For the applications listed above, TST Cable offers extruded PI cables in corresponding specifications, covering various configurations such as single-core, multi-core, shielded, and coaxial designs.
Utilizing an integrated extrusion process, extruded PI cables offer a wider temperature range, superior radiation resistance, better vacuum performance, reduced size and weight, and enhanced stability and longevity. They serve as the optimal solution for harsh environments, fully replacing traditional wrapped PI cables.
For high-end equipment demanding safety, reliability, lightweight design, and long service life, choosing extruded PI cables is not merely an advantage—it is a necessity.
If you require high-performance, highly consistent extruded PI cables, TST Cable provides mature, stable, and high-standard products along with comprehensive support services to ensure the reliable operation of your high-end equipment.
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