tesa_HAF-amber_dr_001

tesa HAF® 8400

270µm amber reactive structural bonding film

  • After curing tesa HAF® 8400 reaches: Very high bonding strength. High temperature resistance. Excellent chemical resistance.
  • Bonds remain flexible and elastic.
  • At room temperature tesa HAF® 8400 is not tacky.

Product description

tesa HAF® 8400 is a reactive heat activated film based on phenolic resin and nitrile rubber. This amber double sided tape has no backing. It is protected by a strong paper liner and can easily be slit and die cut.

It is activated by heat and pressure applied over a certain period of time.

Application Fields

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

  • High-strength splicing (overlap splice)
  • Structural bonding
  • Magnet bonding in electric motors
  • Friction liners for clutches

Product Construction

Type of adhesive nitrile rubber / phenolic resin
Type of liner glassine
Total thickness 270 µm
Backing material none
Color amber

Properties / Performance Values

Bonding strength
Shelf life time (packed) < 15°C 15 months
Shelf life time < 15°C
Shelf life time (packed) < 5°C 18 months
Bonding strength (dynamic shear) 12
Shelf life time < 5°C
Shelf life time (packed) < 25°C 12 months

Additional Info

Technical recommendations
tesa HAF® 8400 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. Please note that optimum parameters strongly depend on the type of machine, particular materials as well as customer requirements.
1.Pre-lamination: tesa HAF® 8400 is laminated before curing. For this process we recommend a temperature between 120°C and 140°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: 120-220 °C
  • Pressure: >2bar
  • Time: 15 – 90 s.
Friction liners for clutches:
  • Temperature: 180 – 230 °C
  • Pressure: > 8 bar
  • Time: 3 min – 30 min
Magnet bonding:
  • Temperature: 140 – 180 °C
  • Pressure > 6-10 bar
  • Time: 2 min - 5 min
Structural bonding:
  • Temperature: 180 – 220 °C
  • Pressure: > 10-15 bar
  • Time: > 3 - 30 min
Bonding strength values were obtained under standard laboratory conditions. Value is guaranteed clearance limit checked with each production batch (Material: Etched aluminium test specimen / Bonding conditions: Temp. = 120 °C; p = 10 bar; t = 8min). To reach maximum bonding strength surfaces should be clean and dry.
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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