Heat activated film

Product description

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.

Product details and specifications

Application Fields

It is suitable for bonding of all thermally resistant materials such as metal, glass, plastic, wood and textiles.

1. Pre-lamination:
tesa® HAF 8401 is laminated before curing. For this process we recommend a temperature between 90 °C and 110 °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 - 200 °C
  • Pressure: > 2 bar
  • Time: 15 sec - 90 sec
Friction liners for clutches:
  • Temperature: 180 - 230 °C
  • Pressure: > 6 bar
  • Time: 5 min - 30 min

To reach maximum bonding strength surfaces should be clean and dry. Storage conditions according to tesa® HAF shelf life concept.

Note: Bonding strength values were obtained under standard laboratory conditions (Mean values). Value is guaranteed clearance limit checked with each production batch (Material: Etched aluminium test specimen / Bonding conditions: Temp. = 120 °C; p = 10 bar; t = 8 min)
tesa® products prove their impressive quality day in, day out in demanding conditions and are regularly subjected to strict controls. All technical information and data above mentioned are provided to the best of our knowledge on the basis of our practical experience. They shall be considered as average values and are not appropriate for a specification. Therefore tesa SE can make no warranties, expressed or implied, including, but not limited to any implied warranty of merchantability or fitness for a particular purpose. The user is responsible for determining whether the tesa® product is fit for a particular purpose and suitable for the user’s method of application. If you are in any doubt, our technical staff will be glad to support you.

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