tesa® 8401 Double Sided Heat Activated Film – 50mm x 25m Roll
£69.84
tesa® HAF 8401 offers several distinct advantages for applications like hotfoil stamping and die bonding:
Thicker, More Robust Bond: At 200µm, it is significantly thicker than 3M 583 (50.8µm), providing a more substantial bond line that is ideal for bonding to irregular or textured substrates.
Familiar Paper/Glassine Liner: It features a paper or glassine liner, which may be preferred by operators accustomed to the handling characteristics of the previous version of 3M 583.
Clean Handling & Die-Cutting: The film is not tacky at room temperature, allowing for easier handling, precise positioning, and cleaner die-cutting before heat activation.
Superior Durability: Once properly cured, the bond achieves very high strength, high temperature resistance, and excellent chemical resistance, while remaining flexible and elastic.
Available in packs of 36 rolls
BUYING MORE THAN 5 BOXES? BULK DISCOUNTS AVAILABLE ON REQUEST
Description
Product Features
A High-Performance Alternative for Demanding Bonding Applications
An ideal choice for users of heat-activated films, particularly those re-evaluating their processes following the recent manufacturing changes to 3M™ Thermal Bonding Film 583. Built on a reliable nitrile rubber and phenolic resin chemistry, tesa® HAF 8401 is engineered for structural bonds that require extreme durability and resilience.
Unlike tapes with initial tack, tesa® HAF 8401 is not tacky at room temperature, allowing for clean handling, easy positioning, and precise die-cutting before thermal activation.
Key Features & Benefits
- Very High Bond Strength: Once cured, it creates powerful, permanent bonds suitable for structural applications.
- High Temperature & Chemical Resistance: Maintains bond integrity when exposed to high temperatures and excellent resistance to oils and solvents.
- Flexible and Elastic Bonds: The final bond remains flexible, making it ideal for substrates that may experience flex or vibration.
- Clean Handling & Die-Cutting: The non-tacky film and paper/glassine liner allow for easy slitting and die-cutting without gumming up equipment.
How Does It Compare to the New 3M™ 583?
While both films are based on a similar nitrile phenolic chemistry, there are key differences to consider:
- Adhesive Thickness: tesa® 8401 is significantly thicker at 200µm (vs. 50.8µm for 3M 583). This is a major advantage for filling gaps on irregular or textured surfaces, creating a more robust bond line.
- Liner Material: Features a familiar paper/glassine liner, which may be preferred by operators accustomed to the handling characteristics of the previous version of 3M 583, as opposed to the new PET liner.
- Activation Profile: Its two-stage activation (becomes tacky for positioning at ~90°C before a full cure at higher temperatures) offers greater process control.
Primary Applications
- Hotfoil Stamping / Die Bonding
- Structural Bonding of Metals, Glass, and Plastics
- Magnet Bonding in Electric Motors
- Bonding Friction Liners for Clutches
IMPORTANT: TESTING IS ESSENTIAL
Due to its different thickness and activation profile, tesa® HAF 8401 is not a direct “drop-in” replacement for other films. Users must conduct trials to adjust their application parameters (temperature, pressure, and dwell time) to achieve optimal results and prevent misinterpreting the need for adjustment as a product failure.
tesa® HAF 8401 is a double-sided thermosetting brown adhesive film, without backing, based on phenolic resin and nitrile rubber.
At room temperature tesa® HAF 8401 is not tacky. It is activated for pre-lamination by heat and starts to become tacky at 90 °C. In a second application step heat and pressure is applied over a certain period of time.
After curing tesa® HAF 8401 reaches a very high bonding strength, high temperature stability and excellent chemical resistance.
Because of the rubber components tesa® HAF 8401 remains flexible and elastic.
tesa® HAF 8401 is supplied with a strong paper liner and can easily be slit and die cut.
