® HAF 8478 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.
During pre-lamination, the adhesive tape is laminated onto the metal substrate. This step does not affect the shelf life of the adhesive tape. Pre-laminated components can be stored over the same period of time as the adhesive tape.
- Temperature¹ 90 – 120 °C
- Pressure² 2 – 6 bar
- Time 1,5 – 3,0 s
Remove the liner from tape after pre-lamination step. Place the plastic part onto the metal component. Apply sufficient temperature through the metal part while applying pressure for the bonding time to reach sufficient bonding strength.
- Temperature¹ 180 – 220 °C
- Pressure² 2 – 10 bar
- Time 3,0 – 10,0 s
To achieve optimum performance a cooling step (while applying pressure) directly after the bonding step is recommended.
¹ ‘Pre-lamination’ and ‘Bonding’ temperature refer to the data that is measured at the surface of heating mould.
² ‘Pre-lamination’ and ‘Bonding’ pressure refer to the force that is transformed from mould surface directly to the bonding area.
Storage conditions according to tesa
® HAF shelf life concept.
Note: Bonding strength values (mean values) were obtained under standard laboratory conditions. (Material: AL & AL test specimen / Bonding conditions: Temperature = 180 °C; Pressure = 10 bar; Time = 7 sec).