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 whitening resistance
  • Excellent ITO compatibility (acid free)
  • Very good bubble stability (outgassing of plastic substrates)
  • High bonding strength
  • Balanced lamination (gap filling) and converting performance
  • Smooth and easy liner removal

Main applications

  • Optically clear lamination of films to rigid or flexible substrates especially in capacitive type touch panels
  • Bonding of flexible touch panels to protective cover or lens
  • Lamination of optical films, e.g. display protection and anti-splinter films

Technical properties

Backing material




Total thickness

0.98 mils

Type of adhesive

pure acrylic

Type of liner


Color of liner


Thickness of liner (easy release)

1.96 mils

Thickness of liner (tight release)

1.96 mils

Transmittance (380 - 780nm) >

99 %

Haze <

0.5 %

Refractive index


Adhesion properties

Adhesion to Glass (initial)

49.33 oz/in

Adhesion to PC (initial)

53.9 oz/in

Adhesion to PET (initial)

37.45 oz/in

Adhesion to PMMA (initial)

52.99 oz/in

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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