Use:
Class H motor slot insulation, turn to turn, interlayer and pad insulation, as well as high temperature resistant electrical and electronic equipment insulation.
Technical parameters:
Indicator Name（6650) | Unit | Indicator value | ||||||||
Nominal thickness | mm | 0.16 | 0.19 | 0.21 | 0.24 | 0.26 | 0.3 | 0.36 | ||
Thickness tolerance | mm | ±0.02 | ±0.03 | ±0.04 | ±0.05 | |||||
Quantitative | g/㎡ | 175±25 | 195±30 | 230±35 | 260±40 | 300±45 | 330±45 | 410±50 | ||
Nominal thickness of polyimide film | μm | 50 | 75 | 100 | 125 | 150 | 190 | 250 | ||
Nominal thickness of polyimide fiber paper | μm | 50 | 50 | 50 | 50 | 50 | 50 | 50 | ||
Tensile strength | Vertical | No bending | N/10mm Width | ≥120 | ≥140 | ≥160 | ≥180 | ≥200 | ≥250 | ≥270 |
After bending | ≥70 | ≥90 | ≥90 | ≥130 | ≥150 | ≥170 | ≥180 | |||
Horizontal | No bending | ≥80 | ≥90 | ≥100 | ≥110 | ≥120 | ≥150 | ≥170 | ||
After bending | ≥50 | ≥70 | ≥80 | ≥80 | ≥100 | ≥110 | ≥130 | |||
Elongation | Vertical | % | ≥10 | |||||||
Horizontal | ≥8 | |||||||||
Breakdown voltage | No bending | kv | ≥8 | ≥9 | ≥10 | |||||
After bending | ≥7 | ≥8 | ≥9 | |||||||
Layering | -- | No delamination, no bubbles or other defects | ||||||||
Subject to heat (200 ± 2°C, 10 min or as agreed upon by the supplier and buyer) | -- | No delamination, no bubbling, no glue dripping | ||||||||
Stiffness | N | Pending | ||||||||
Long-term heat resistance Temperature index (TI) | -- | ≥180 | ||||||||
Indicator Name（6650A) | Unit | Indicator value | ||||||||
Nominal thickness | mm | 0.15 | 0.19 | 0.21 | 0.23 | 0.26 | 0.3 | 0.31 | ||
Thickness tolerance | mm | ±0.02 | ±0.03 | ±0.04 | ±0.05 | |||||
Quantitative | g/㎡ | 155±25 | 175±25 | 195±30 | 230±35 | 260±40 | 300±45 | 330±50 | ||
Nominal thickness of polyimide film | μm | 50 | 75 | 100 | 125 | 150 | 190 | 250 | ||
Nominal thickness of polyimide fiber paper | μm | 50 | 50 | 50 | 50 | 50 | 50 | 50 | ||
Tensile strength | Vertical | No bending | N/10mm Width | ≥120 | ≥140 | ≥160 | ≥180 | ≥200 | ≥250 | ≥270 |
After bending | ≥70 | ≥90 | ≥110 | ≥130 | ≥150 | ≥170 | ≥180 | |||
Horizontal | No bending | ≥100 | ≥120 | ≥140 | ≥150 | ≥170 | ≥200 | ≥220 | ||
After bending | ≥70 | ≥90 | ≥110 | ≥120 | ≥140 | ≥160 | ≥170 | |||
Elongation | Vertical | % | ≥10 | |||||||
Horizontal | ≥8 | |||||||||
Breakdown voltage | No bending | kv | ≥8 | ≥9 | ≥10 | |||||
After bending | ≥7 | ≥8 | ≥9 | |||||||
Layering | -- | No delamination, no bubbles or other defects | ||||||||
Subject to heat (200 ± 2°C, 10 min or as agreed upon by the supplier and buyer) | -- | No delamination, no bubbling, no glue dripping | ||||||||
Stiffness | N | Pending | ||||||||
Long-term heat resistance Temperature index (TI) | -- | ≥180 | ||||||||
6650NHN polyimide film polyaramid fiber paper composite material is a premium-grade electrical insulation laminate engineered to deliver exceptional mechanical strength, chemical resistance, and high-temperature endurance for demanding industrial applications. As a widely adopted Class H (180°C) insulation material, 6650NHN is formulated to provide long-term durability under continuous thermal load, ensuring stable performance in electrical machines where reliability and safety are crucial.
6650NHN consists of a central layer of high-performance polyimide film bonded between two layers of polyaramid fiber paper, creating a three-layer structure that maximizes electrical performance and mechanical protection. This combination delivers:
High dielectric strength
Exceptional thermal resistance
Stable electrical insulation under harsh operating conditions
Long service life in heavy-duty electrical systems
NHN insulation is a preferred material for manufacturers seeking durability, thermal endurance, and mechanical reliability without compromising ease of processing.
Its Class H rating ensures reliable long-term operation even in high-temperature environments.
Aramid fiber paper provides:
Tear resistance
Flexibility
Dimensional stability
Strong mechanical reinforcement
Polyimide film is known for:
High breakdown voltage
Strong insulating properties
Low dielectric loss
6650NHN withstands:
Oils
Solvents
Humidity
Electrical varnishes
Suitable for motors, transformers, EV systems, coils, aerospace electronics, and high-temperature devices.
| Property | Value |
Temperature Class | 180°C |
Thickness | 0.10–0.40 mm |
Tensile Strength | 70–120 N/10 mm |
Breakdown Voltage | 8–18 kV |
Thermal Aging | Excellent |
Resin Absorption | High |
Flexibility | High |
Flame Resistance | Available upon request |
Servo motors
Traction motors
Industrial motors
Compressor motors
Aerospace motors
Dry-type transformers
High-temperature coil insulation
Layer insulation for windings
EV motors
Battery modules
Charging stations
Sensors
Coils
Welding equipment
Use:
Laser cutting
Mechanical punching
CNC die-cutting
Material remains flexible after forming and does not crack.
Fully compatible with:
VPI resins
Epoxy
Polyester
Polyurethane
Avoid sharp tools
Do not fold severely in cold environments
Keep material clean and dust-free
Cause: Excessive bending at low temperature
Solution: Preheat material before forming
Cause: Humidity absorption
Solution: Dry at 60–80°C for 2–4 hours
Cause: Insufficient varnish penetration
Solution: Increase impregnation time
Q1: Is 6650NHN suitable for inverter-driven motors?
Yes, its high dielectric strength makes it ideal for high-frequency environments.
Q2: Can it be used in high-humidity environments?
Yes, but drying before assembly is recommended.
Q3: What’s the typical shelf life?
Up to 24 months in proper storage.
Store at 10–30°C
Keep dry and sealed
Avoid long exposure to sunlight
6650NHN polyimide aramid composite insulation material stands out as a superior choice for high-temperature, high-voltage, and long-term electrical applications. Its balance of mechanical strength, dielectric properties, and thermal endurance makes it one of the most reliable insulation materials in global electrical manufacturing.
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