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tesa HAF® 8490

Heat activated film

Product description

tesa® HAF 8490 is a thermosetting single-sided adhesive film (brown) that is based on phenolic resin and nitrile rubber. It has a white cotton fabric carrier.

At room temperature, tesa® HAF 8490 is not tacky. It is activated for pre-lamination by heat and becomes tacky at 90°C. In a second application step heat and pressure is applied over a certain period of time.

After curing, tesa® HAF 8490 reaches a very high bonding strength, high temperature stability and excellent chemical resistance. Because of the rubber components, HAF 8490 remains flexible and elastic.

tesa® HAF 8490 can easily be slit and die-cut.

Application Fields

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

Product Construction

Type of adhesive nitrile rubber / phenolic resin
Type of liner none
Total thickness 12.4 mils
315 µm
Backing material cotton fabric
Color amber

Properties / Performance Values

Shelf life time (packed) < 15°C 15 months
Shelf life time (packed) < 5°C 18 months
Tensile strength 51.39 lbs/in
90 N/cm
Shelf life time (packed) < 25°C 12 months

Additional Info

Processing:

1. Pre-lamination:
tesa® HAF 8490 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°C - 200°C
  • Pressure: > 2 bar
  • Time: 15 sec - 90 sec

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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