APTIV™ XPI A106
APTIV™ XPI A106 is an unfilled, semi-crystalline film manufactured from VICTREX™ PEEK polymer, available at 125 µm with a density of 1.30 g/cm³, engineered for high-voltage e-motor stator slot liner applications at 800 V and above. It delivers a breakdown voltage of 18.9 kV at 23°C, a partial discharge inception voltage of 1267 V at 23°C, and a Relative Thermal Index (Electrical) of 240°C per UL 746B. The film provides outstanding resistance to water, ATF, oils, and cooling fluids, supporting all cooling concepts from water-based systems to direct oil immersion.
Key Properties
- Tensile Stress, MD: 23°C, 125 µm: 120 MPa (ISO 527)
- Tensile Elongation, MD: 23°C, 125 µm: >150 % (ISO 527)
- Breakdown Voltage 1 kV/s (23°C): 18.9 kV (ASTM D149)
- Dielectric Constant (23°C) 1 kHz: 3.20 (IEC 60250)
- Film Thickness — Recommended/Available: 125 µm
Density Crystalline (23°C): 1.30 g/cm³ (ISO 1183)
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- Specifications
- Applications
- General Info
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Physical Properties
| Property | Value | Test Method |
| Density Crystalline (23°C) | 1.30 g/cm³ | ISO 1183 |
| Water Absorption, Equilibrium, 23°C, 0.0500 mm, 50% RH | 0.040 % | ISO 62 |
| Shrinkage MD TM-VX-84 (200°C, 50.0 µm) | <0.50 % | — |
| Shrinkage TD TM-VX-84 (200°C, 50.0 µm) | <0.50 % | — |
Mechanical Properties
| Property | Value | Test Method |
| Film Thickness — Recommended/Available | 125 µm | — |
| Tensile Modulus, MD: 23°C, 125 µm | 2400 MPa | ISO 527 |
| Tensile Modulus, TD: 23°C, 125 µm | 2300 MPa | ISO 527 |
| Tensile Stress, MD: 23°C, 125 µm | 120 MPa | ISO 527 |
| Tensile Stress, TD: 23°C, 125 µm | 120 MPa | ISO 527 |
| Tensile Elongation, MD: 23°C, 125 µm | >150 % | ISO 527 |
| Tensile Elongation, TD: 23°C, 125 µm | >150 % | ISO 527 |
Thermal Properties
| Property | Value | Test Method |
| Glass Transition Temperature (Onset) | 143 °C | ISO 11357 |
| Melting Temperature | 343 °C | ISO 11357 |
| CLTE — Flow below Tg (0.0500 mm) | 3.5E-5 cm/cm/°C | ASTM D696 |
| Thermal Conductivity Through Plane | 0.25 W/m/K | ASTM E1461 |
| RTI Elec | 240 °C | UL 746B |
Electrical Properties
| Property | Value | Test Method |
| Volume Resistivity (23°C) | 1.0E+16 ohms•cm | IEC 60093 |
| Comparative Tracking Index (CTI) 23°C | PLC 4 | IEC 60112 |
| Breakdown Voltage 1 kV/s (23°C) | 18.9 kV | ASTM D149 |
| Breakdown Voltage Retention (180°C, 500 V/s) | >95.0 % | IEC 60243 |
| Dielectric Constant (23°C) 1 kHz | 3.20 | IEC 60250 |
| Dissipation Factor (23°C) 1MHz | 3.0E-3 | IEC 60250 |
| Partial Discharge Inception Voltage, 23°C | 1267 V | IEC 60270 |
| Partial Discharge Inception Voltage, 180°C | 967 V | IEC 60270 |
- High-voltage slot liner insulation in 800 V and above e-motor stator windings requiring higher breakdown voltage than 100 µm grades
- Primary and secondary electrical insulation in traction motors for electric vehicles
- Stator insulation in direct oil-immersion cooled electric machines
- Phase insulation films in automated stator winding assembly processes
- Resin-free electric machine insulation requiring wear resistance and chemical compatibility
Common industries: Electric vehicle (EV) powertrain, e-motor manufacturing, automotive, industrial drives, aerospace electrification.
APTIV™ XPI A106 is part of the APTIV™ XPI series of PEEK films engineered for high-voltage electric motor stator insulation. At 125 µm, it occupies the second position in the XPI A-series and is designed to deliver increased breakdown voltage relative to A105 while maintaining the same unfilled semi-crystalline PEEK construction.
The film meets the requirements of 800 V and higher slot liner applications, providing long-term thermal stability in rotating machines with an RTI Elec of 240°C (UL 746B), glass transition onset of 143°C, and melting temperature of 343°C per ISO 11357.
Mechanical properties are tailored for automated winding and insertion processes, with tensile stress of 120 MPa in both MD and TD at 125 µm and elongation exceeding 150% in both directions. The film is compatible with a wide range of impregnation resins and provides optimized wear resistance for resin-free electric machine concepts. CLTE below Tg is 3.5E-5 cm/cm/°C (ASTM D696) and through-plane thermal conductivity is 0.25 W/m·K (ASTM E1461).
Breakdown voltage retention at 180°C is >95.0% per IEC 60243. The standard supply format is a 650 mm wide roll, 1050 m length, on a 152 mm (6″) core, with a standard roll outer diameter of 450 mm.
No compliance standards are specified on the manufacturer’s TDS for this material. The TDS references UL 746B for the RTI Elec value and IEC/ASTM test methods for property characterization.
What differentiates APTIV™ XPI A106 from A105, A107, and A108?
APTIV™ XPI A106 at 125 µm provides a breakdown voltage of 18.9 kV — higher than A105 (16.2 kV at 100 µm) and lower than A107 (21.6 kV at 150 µm) and A108 (25.9 kV at 200 µm). It delivers a partial discharge inception voltage of 1267 V at 23°C. A106 is selected when the application requires greater dielectric margin than A105 can offer but where slot volume constraints preclude the thicker A107 or A108 gauges.
Why does tensile strength matter when selecting an e-motor insulation film?
In stator slot liner applications, the film must withstand the mechanical forces of automated insertion equipment, winding tension, and long-term vibration in service without tearing or cracking. APTIV™ XPI A106 achieves 120 MPa tensile stress in both MD and TD at 125 µm, combined with >150% elongation, ensuring reliable processing on automated assembly lines and mechanical durability throughout the motor's service life.
What is the operating temperature range for APTIV™ XPI A106?
The TDS reports a glass transition temperature onset of 143°C and a melting temperature of 343°C per ISO 11357. The Relative Thermal Index (Electrical) is rated at 240°C per UL 746B, indicating long-term electrical performance at this temperature.
Is APTIV™ XPI A106 suitable for regulated environments?
The TDS reports an RTI Elec of 240°C per UL 746B. No additional compliance certifications are listed on the manufacturer's TDS for this material.
How should APTIV™ XPI A106 be specified?
Specify grade (APTIV™ XPI A106), thickness (125 µm), compliance requirements, dimensional tolerances, and finished format.
