Description
25µm optically clear transfer tape
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
| Total thickness | 25 µm |
| Type of adhesive | pure acrylic |
| Transmittance (380 – 780nm) > | 99 % |
| Haze | < 0.5 % |
| Refractive index | 1.48 |
Adhesion properties
| Adhesion to Glass (after 14 days) | 6.6 N/cm |
| Adhesion to Glass (initial) | 5.4 N/cm |
| Adhesion to PC (after 14 days) | 7 N/cm |
| Adhesion to PC (initial) | 5.9 N/cm |
| Adhesion to PET (after 14 days) | 5 N/cm |
| Adhesion to PET (initial) | 4.1 N/cm |
| Adhesion to PMMA (after 14 days) | 6.6 N/cm |
| Adhesion to PMMA (initial) | 5.8 N/cm |
| Adhesion to Steel (after 14 days) | 6.6 N/cm |
| Adhesion to Steel (initial) | 5.2 N/cm |
