Ultra Light-Weld 9702 optical display adhesive cures upon exposure to UV/Visible light and is designed for use in flat panel displays where re-workability and non-yellowing characteristics are important. Bondable substrates include PC, PET, PMMA, glass, and stainless steel. Typical applications include optical display bonding and lamination of small hand-held screens, touch screens, and large display screens.
This material is easily re-workable for removal or repair by conventional methods such as wire cutting, while maintaining it’s bond strength over time. This can significantly increase yield and reduce display screen rejects. This non-yellowing adhesive maintains optical clarity over time for better performance and aesthetics and exhibits low shrinkage to minimize visible distortion after cure.
FEATURES:
- UV/Visible light cure
- Excellent re-workability
- Non-yellowing
- Low shrinkage
- Bonds to a variety of surfaces
- Medium vicosity performance
- Good thermal shock resistance
APPLICATIONS:
- Optical display lamination
- Touch screens
| Uncured properties | ||
| Property | Value | Test method |
| Solvent content | No Nonreactive solvent | N/A |
| Chemical class | Acrylated urethane | N/A |
| Appearance | Light yellow liquid | N/A |
| Soluble in | Organic solvents | N/A |
| Density, g/ml | 0.93 | ASTM D1875 |
| Viscosity, cP (20rpm) | 950 (nominal) | DSTM 502 |
| Cured mechanical properties | ||
| Property | Value | Test method |
| Durometer hardness | 00-70 | ASTM D2240 |
| Tensile at break, MPa [psi] | 0.89 [129] | ASTM D638 |
| Elongation at break, % | 137 | ASTM D638 |
| Modulus of Elasticity, MPa [psi] | 0.36 [52] | ASTM D638 |
| Other cured properties | ||
| Property | Value | Test method |
| Boiling water absorption, % (2h) | 0.35 | ASTM D570 |
| Refractive index (20°C) | 1.49 | ASTM D542 |
| Water absorption, % (25°C, 24h) | 0.42 | ASTM D570 |
| Volumetric shrinkage, % | 4.2 | DSTM 611 |