tesa® LTC 58724

Technical recommendations:
tesa® LTC is not self-adhesive. It is activated by heat and pressure over a certain interval. The following values are recommendations for bond line parameters to start with.
1) Pre-lamination
During pre-lamination, laminate the film onto the first component. Setting:

• Temperature¹: 50-60 °C
• Pressure²: 1-5 bar
• Time: 5–20 s

Short-time exposure to 60°C bond line temperature during pre-lamination does not impact final bonding potential.
2) Bonding
Remove the liner from the film after the pre-lamination step. Position the second component. Apply temperature and pressure for the bonding time to reach sufficient bonding strength. Setting:

• Temperature¹: 75–110 °C
• Pressure²: 5–10 bar
• Time: 10–480 s

Temperature, pressure and time will depend upon the type and thickness of the substrates. Generally, thicker substrates or lower bonding temperatures will require longer bonding times.
Short cycle times can be achieved at 110 °C bond line temperature. For activation at lower temperatures, increase the heat-press time or combine a short heat-press step with oven curing.
Bonding strength values were obtained under standard laboratory conditions (Material: PC/PC; bonding conditions: temperature = 90 °C; pressure = 10 bar; time = 300 sec).
To reach maximum bonding strength, surfaces should be clean and dry. Allow at least 1-2 hours dwell-time after bonding before performance testing. Final bonding strength will be reached after 24 hours.
Storage

• tesa recommends storage in original packaging in cool and dry conditions.
• tesa^® LTC should not be exposed to more than 35 °C at any time before bonding (during transport, storage and converting). Long term storage should remain below 25 °C.
• The shelf life is 12 months after production. For the actual shelf life please refer to the best before date on the label in the log roll core.
• More details are available in our transportation guideline.

¹ ‘Pre-lamination’ and ‘Bonding’ temperature refer to the data that is measured in the bond line. ² ‘Pre-lamination’ and ‘Bonding’ pressure refer to the force that is transferred from jig surface directly to the bonding area.