Product information

tesa® 69401

25µm optically clear transfer tape

Product description

tesa® 69401 is a highly transparent transfer tape produced under controlled clean room conditions and designed for optically clear lamination.

Special features:
  • High transmission and low haze
  • Excellent temperature, humidity and UV resistance
  • Excellent ITO compatibility (acid free)
  • High bonding strength
  • Balanced lamination (gap filling) and converting performance
  • Smooth and easy liner removal

Main applications

  • General solution for optically clear lamination
  • Lamination of films to rigid substrates of lamination of two rigid substrates
  • Bonding of displays to cover glass or touch panel

Technical properties

Refractive index


Type of adhesive

pure acrylic

Thickness of easy release liner

50 µm

Thickness of tight release liner

50 µm

Type of liner


Colour of liner


Transmittance (380 - 780nm) >

99 %

Total thickness

25 µm


0.5 %

Backing material




Adhesion properties

Adhesion to PC (initial)

5.9 N/cm

Adhesion to PET (initial)

4.1 N/cm

Adhesion to Glass (initial)

5.4 N/cm

Adhesion to PMMA (initial)

5.8 N/cm

Additional Info

  • 50µm easy release PET liner (outside of the roll)
  • 50µm tight release liner

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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