tesa HAF 8401 Double Sided Heat Activated Film
product detail
Tesa® 8401 is a high-performance Heat Activated Film (HAF) based on a sophisticated blend of phenolic resin and nitrile rubber. Unlike pressure-sensitive tapes, this amber-colored film is non-tacky at room temperature and achieves its maximum bonding strength through a combination of heat and pressure.
Key Features:
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High Performance: Offers exceptional shear strength and chemical resistance after curing.
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Temperature Stability: Remains reliable even under high thermal stress (up to 200°C+ temporarily).
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Precision Bonding: Thin film format ensures uniform thickness and clean application without liquid glue mess.
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Excellent Ageing Resistance: Ideal for long-term industrial components.
| Feature | Details |
| Backing Material | None (Pure Adhesive Film) |
| Type of Adhesive | Nitrile Rubber / Phenolic Resin |
| Color | Amber |
| Total Thickness | 100um |
| Bonding Temp | 120-220degrees |
Application
Tesa 8401 is widely used in industries requiring structural-grade adhesion:
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Electronic Components: Bonding of decorative metal parts in smartphones, laptops, and heat sinks.
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Automotive Industry: Used for friction materials, brake linings, and interior trim bonding where high heat resistance is vital.
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Chip Card Production: Reliable embedding of chip modules into smart cards.
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Industrial Splicing: High-strength splicing of technical fabrics and foils during continuous processing.
Additional Info
Processing
tesa HAF 8401 is not self adhesive. It is activated by heat and pressure over a certain interval. The following values are recommendations for machine parameters to start with. Please note that optimum parameters strongly depend on the type of machine, particular materials as well as customer requirements.
1.Pre-lamination: tesa HAF® 8401 is laminated before curing. For this process we recommend a temperature between 120°C and 140°C.
2.Bonding: The bonding conditions temperature, pressure and time depend on the application. Following parameters can be regarded as a guideline:
Splicing application:
- Temperature: 120-220 °C
- Pressure: >2bar
- Time: 15 – 90 s.
Friction liners for clutches:
- Temperature: 180 – 230 °C
- Pressure: > 8 bar
- Time: 3 min – 30 min
Magnet bonding:
- Temperature: 140 – 180 °C
- Pressure > 6-10 bar
- Time: 2 min - 5 min
Structural bonding:
- Temperature: 180 – 220 °C
- Pressure: > 10-15 bar
- Time: > 3 - 30 min
Bonding strength values were obtained under standard laboratory conditions. Value is guaranteed clearance limit checked with each production batch (Material: Etched aluminium test specimen / Bonding conditions: Temp. = 120 °C; p = 10 bar; t = 8min). To reach maximum bonding strength surfaces should be clean and dry.