APTIV™ XPI B105
APTIV™ XPI B105 is a mineral-filled, semi-crystalline film manufactured from VICTREX™ PEEK polymer, available at 100 µm with a density of 1.45 g/cm³, engineered for high-voltage e-motor stator slot liner applications at 800 V and above. It delivers enhanced through-plane thermal conductivity of 0.43 W/m·K — significantly higher than the unfilled XPI A-series — a breakdown voltage of 16.5 kV at 23°C, a partial discharge inception voltage of 1187 V at 23°C, and a Relative Thermal Index (Electrical) of 240°C per UL 746B. The TDS specifically describes B105 as providing enhanced thermal conductivity at minimal slot liner thickness for ultra-low thermal resistance.
Key Properties
- Tensile Stress, MD: 23°C, 100 µm: 100 MPa (ISO 527)
- Tensile Elongation, MD: 23°C, 100 µm: >100 % (ISO 527)
- Breakdown Voltage 1 kV/s (23°C): 16.5 kV (ASTM D149)
- Dielectric Constant (23°C) 1 kHz, tested on resin feedstock: 3.20 (IEC 60250)
- Film Thickness — Recommended/Available: 100 µm
- Density Crystalline (23°C): 1.45 g/cm³ (ISO 1183)
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Density Crystalline (23°C) | 1.45 g/cm³ | ISO 1183 |
| Water Absorption, Equilibrium, 23°C, 0.0500 mm, 50% RH | 0.080 % | 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 | 100 µm | — |
| Tensile Modulus, MD: 23°C, 100 µm | 4500 MPa | ISO 527 |
| Tensile Modulus, TD: 23°C, 100 µm | 4200 MPa | ISO 527 |
| Tensile Stress, MD: 23°C, 100 µm | 100 MPa | ISO 527 |
| Tensile Stress, TD: 23°C, 100 µm | 80.0 MPa | ISO 527 |
| Tensile Elongation, MD: 23°C, 100 µm | >100 % | ISO 527 |
| Tensile Elongation, TD: 23°C, 100 µm | >10 % | 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 | 0.43 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) | 16.5 kV | ASTM D149 |
| Breakdown Voltage Retention (180°C, 500 V/s) | >95.0 % | IEC 60243 |
| Dielectric Constant (23°C) 1 kHz, tested on resin feedstock | 3.20 | IEC 60250 |
| Dissipation Factor 1MHz, tested on resin feedstock | 3.0E-3 | IEC 60250 |
| Partial Discharge Inception Voltage, 23°C | 1187 V | IEC 60270 |
| Partial Discharge Inception Voltage, 180°C | 921 V | IEC 60270 |
- High-voltage slot liner insulation in 800 V and above e-motor stator windings where thermal management through the insulation layer is critical
- Stator insulation in thermally demanding direct oil-immersion or water-cooled electric machines requiring ultra-low thermal resistance
- Primary and secondary electrical insulation in high-power-density traction motors where insulation thermal conductivity directly affects motor efficiency
- Phase insulation films in automated stator winding assembly processes where both dielectric performance and heat dissipation are design constraints
- Resin-free electric machine insulation requiring wear resistance, chemical compatibility, and enhanced thermal conductivity
Common industries: Electric vehicle (EV) powertrain, e-motor manufacturing, automotive, industrial drives, aerospace electrification.
APTIV™ XPI B105 is the mineral-filled counterpart to the unfilled APTIV™ XPI A105, sharing the same 100 µm gauge but delivering substantially higher through-plane thermal conductivity — 0.43 W/m·K versus 0.25 W/m·K for the A-series grades.
This enhanced thermal conductivity at minimal slot liner thickness is the defining performance advantage of B105, enabling ultra-low thermal resistance in e-motor designs where heat extraction through the stator insulation is critical to motor efficiency and power density.
The film meets the requirements of 800 V and higher slot liner applications and carries an RTI Elec of 240°C per UL 746B, with glass transition onset of 143°C and melting temperature of 343°C per ISO 11357.
As a mineral-filled grade, B105 has a higher density (1.45 g/cm³) and a higher tensile modulus (4500 MPa MD, 4200 MPa TD at 100 µm) than the unfilled XPI A-series grades at equivalent gauge. Elongation is >100% MD and >10% TD — lower than the A-series >150% in both directions — reflecting the effect of mineral filler on ductility.
The film provides outstanding chemical and hydrolysis resistance to water, ATF, oils, and cooling fluids, is compatible with a wide range of impregnation resins, and offers optimized wear resistance for resin-free machine concepts. CLTE below Tg is 3.5E-5 cm/cm/°C (ASTM D696). Breakdown voltage retention at 180°C is >95.0% per IEC 60243.
The standard supply format is a 610 mm wide roll, 400 m length, on a 152 mm (6″) core, with a standard roll outer diameter of 300 mm. Note: dielectric constant and dissipation factor are listed on the TDS as tested on resin feedstock.
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 B105 from APTIV™ XPI A105?
Both B105 and A105 are 100 µm films for 800 V+ slot liner applications, but B105 is mineral-filled (density 1.45 g/cm³ versus 1.30 g/cm³ for A105) and delivers significantly higher through-plane thermal conductivity — 0.43 W/m·K versus 0.25 W/m·K. This makes B105 the preferred choice when heat extraction through the stator insulation is a design priority. The tradeoff is lower TD elongation (>10% versus >150% for A105) and a higher tensile modulus (4500 MPa MD versus 2400 MPa for A105), which affects formability in automated assembly.
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 B105 achieves 100 MPa tensile stress MD and 80.0 MPa TD at 100 µm, with >100% MD elongation. The higher modulus characteristic of the mineral-filled construction also contributes to dimensional stability of the slot liner during motor assembly.
What is the operating temperature range for APTIV™ XPI B105?
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 B105 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 B105 be specified?
Specify grade (APTIV™ XPI B105), thickness (100 µm), compliance requirements, dimensional tolerances, and finished format.
