Description
PERMABOND UV681 is a cure-configurable coating. Since it’s curable to UV light it makes for a very configurable and customizable curing coating.
It is ideal for coating small parts and electronics (such as conformal coating) to protect against environmental and vibrational damage. The optically clear / tack free formulation also makes this product particularly suitable for coating smart card microchips amongst various other applications. Its low viscosity ensures an even, bubble-free coating and high temperature resistance allows it to resist wave-soldering.
Features & Benefits
- User-Controlled Clear Coating
- Cure on demand with UV Light
- Low viscosity for good coverage
- Tack free
- Fast curing with low-power lamps
- 100% solids, no solvent
Physical Properties of Uncured Adhesive
| Chemical Composition | Acrylate |
| Viscosity @ 25C |
80 to 100 mPa.s (cP) |
| Specific Gravity | 1.1 |
Performance Characteristics
|
UV Curing Wavelength |
320 – 420 nm |
|
UV Curing Fixture Time (by strength of light) |
Low power 4mW/cm battery lamp: 7 secs |
|
UV Curing Tack-Free Time (by strength of light) |
Low power 4mW/cm battery lamp: 15 secs |
|
Tensile Strength |
10-12 N/mm (1450-1700psi) |
|
Light Transmittance |
>98% |
|
Temperature Resistance |
212f (100C) 60% strength 302f (150C) 18% strength |
|
Appearance |
High Clarity, Colorless, Optically Clear, Transparent |
|
Elongation (ISO37) |
>50% |
|
Hardness (ISO868) |
50 to 65 Shore D |
*The cure time depends on the power of the UV lamp, its spectral output, the distance between the lamp and the components, and the transmission characteristics of the substrates.**LED UV lamps have a narrow range of spectral output. It is important to check suitability with Permabond in order to match the LED lamps peak wavelength with that of the adhesives photoinitiator to ensure optimal adhesive cure.
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