High Dielectric Strength ETFE Cable Insulation Resin CAS 25067-11-2 Wire Jacketing Material for Harsh Environments

The SHEC-CI200 ETFE Cable Insulation Resin is a high-performance ethylene tetrafluoroethylene copolymer specifically developed for thin-wall wire and cable jacketing applications where exceptional dielectric properties, mechanical toughness, and resistance to harsh environmental conditions are critical. Manufactured under ASTM D3159 quality standards, this CAS 25067-11-2 grade ETFE delivers consistent pellet geometry and melt flow characteristics optimized for high-speed extrusion coating of copper and aluminum conductors ranging from AWG 30 signal wires to AWG 8 power distribution cables. The material’s unique combination of high dielectric strength, broad temperature resilience, and inherent flame retardancy makes it the preferred insulation material for aerospace wiring, automotive under-hood harnesses, downhole logging cables, and nuclear power plant instrumentation wires.

The SHEC-CI200 resin is produced through a controlled copolymerization process with precisely regulated comonomer ratios that balance crystallinity with amorphous phase flexibility. This molecular architecture provides the optimum combination of stiffness for crush resistance during cable pulling and flexibility for tight bend radius routing in confined equipment enclosures. The translucent to white pellet form ensures clean handling and consistent feeding in single-screw extrusion lines, while the carefully controlled volatile matter content minimizes bubble formation and dielectric defects in the extruded insulation layer. With a limiting oxygen index exceeding 30%, cables insulated with SHEC-CI200 meet stringent fire safety requirements without requiring additional flame-retardant additives that could compromise electrical performance.

• High Dielectric Performance: Dielectric strength exceeding 16 kV/mm combined with a low dissipation factor (≤0.009 at 10⁶ Hz) ensures reliable signal integrity in high-frequency data cables, low leakage current in power distribution wiring, and excellent insulation resistance even in high-humidity or condensing environments.
• Exceptional Flex Life and Toughness: The combination of high tensile strength (≥40 MPa) and outstanding breaking elongation (≥320%) provides remarkable resistance to repeated flexing, vibration-induced fatigue, and mechanical abrasion, extending cable service life in robotics, aerospace actuators, and automotive engine compartment applications where continuous motion and thermal cycling are unavoidable.
• Broad Temperature Capability: The cable insulation maintains full electrical and mechanical properties across an extreme temperature range from -200°C cryogenic conditions to +150°C continuous operation, with short-term excursions to 200°C tolerated without insulation degradation, making it suitable for liquid nitrogen-cooled superconducting magnet leads and high-temperature engine bay wiring alike.
• Chemical and Fluid Resistance: The fully fluorinated polymer backbone withstands prolonged exposure to hydraulic fluids (Skydrol, MIL-PRF-83282), jet fuels (JP-8, Jet A-1), lubricating oils, de-icing fluids, cleaning solvents, and battery electrolytes without swelling, cracking, or loss of dielectric properties, ensuring reliable insulation performance in aircraft, military vehicles, and chemical plant instrumentation.
• Thin-Wall Extrusion Capability: Optimized melt flow rate (15-30 g/10min) enables consistent extrusion of insulation layers as thin as 0.05 mm on fine-gauge conductors without melt fracture or concentricity deviation, reducing cable weight and diameter for aerospace and portable electronic applications where every gram and millimeter matters.
• Inherent Flame Retardancy: With a limiting oxygen index of 30% or higher, ETFE-insulated cables pass UL VW-1 and IEEE 383 vertical tray flame tests without requiring halogenated flame retardant additives, producing minimal smoke and no corrosive gas emissions during combustion, which is critical for enclosed spaces in aircraft, submarines, and mass transit vehicles.
• Radiation Resistance: The polymer’s stable carbon-fluorine bond structure provides excellent resistance to gamma and electron beam radiation up to 100 MRad accumulated dose, enabling reliable long-term performance in nuclear power plant cable systems, medical device sterilization environments, and space satellite wiring harnesses exposed to cosmic radiation.

SHEC-CI200 ETFE cable insulation resin serves as the primary dielectric material in aerospace airframe wiring specified under MIL-W-22759 and SAE AS22759 standards, where its combination of light weight, high-temperature capability, and resistance to aggressive hydraulic fluids enables reliable performance in wing flap actuators, landing gear sensors, and engine nacelle instrumentation circuits. In automotive manufacturing, this grade insulates battery management system sense wires in electric vehicles, engine compartment sensor harnesses exposed to continuous 125°C ambient temperatures, and transmission control module wiring subjected to hot automatic transmission fluid immersion. The material’s radiation resistance qualifies it for nuclear power plant safety-related cable systems, including reactor vessel level instrumentation, containment building penetration seals, and emergency core cooling system actuator wiring.

In the oil and gas sector, SHEC-CI200 jackets downhole logging tool cables, subsea control umbilical conductors, and refinery process instrumentation wiring exposed to hydrogen sulfide, crude oil fractions, and high-pressure steam. The electronics industry utilizes this grade for semiconductor manufacturing equipment internal wiring that must withstand repeated exposure to fluorine-based cleaning gases and plasma etch byproducts. Medical device manufacturers specify ETFE-insulated lead wires in MRI-compatible surgical instruments, implantable neurostimulator connection cables, and autoclave-sterilizable sensor assemblies where repeated steam sterilization at 134°C must not degrade insulation integrity. Telecommunications equipment uses thin-wall ETFE insulation in base station antenna feed lines and satellite communication coaxial cables requiring low signal loss across broad frequency ranges spanning DC to 18 GHz.

SHEC-CI200 ETFE cable insulation resin is packaged in 25 KG multi-layer moisture-barrier bags with inner PE liners and durable outer woven PP construction to prevent contamination and moisture absorption during global shipping. Alternative packaging configurations including 500 KG bulk supersacks and 10 KG evaluation trial quantities are available upon request to accommodate pilot extrusion trials and full-scale production requirements. Each manufacturing lot undergoes comprehensive quality verification testing covering melt flow rate by ASTM D1238, differential scanning calorimetry for melting point and crystallinity, dielectric strength measurement per ASTM D149, and extrusion coating trial evaluation on 20 AWG stranded copper conductor. A detailed Certificate of Analysis documenting all quality metrics is provided with every shipment. The resin should be stored in clean, dry warehouse conditions at temperatures below 30°C, away from direct sunlight and moisture sources. Pre-drying at 120°C for 4 hours is recommended prior to extrusion processing to achieve optimal insulation layer quality. Under proper storage conditions, the product maintains full performance characteristics for 24 months from the date of manufacture. Shenhui Technology offers application engineering support including extrusion process parameter optimization, conductor preheating recommendations, and crosshead tooling selection guidance to help cable manufacturers achieve consistent, high-yield production results.