PERMABOND UV640
Harmonization Code : 3907.30.00.40 | Epoxy Mold Compounds containing by weight more than 70 % silicon dioxide
Main features
- Fast Low-Power UV Cure
- High-Elongation Plastic Bonding
- Clear Polycarbonate Assembly
Product Description
Permabond UV640 is a single-part, medium-viscosity methacrylate adhesive developed for rapid UV bonding of plastics, including polycarbonate and acrylic. The clear liquid cures on demand across 365 to 420 nm, with typical fixture times from 2 to 10 seconds under the listed lamp conditions. At 25 deg C, viscosity is 3,000 to 5,000 mPa s at 20 rpm. The cured adhesive combines 13 N/mm^2 tensile strength with 110% elongation and 55 to 75 Shore D hardness, supporting plastic assemblies and joints between substrates with different coefficients of thermal expansion.
Key features
- Fast Low-Power UV Cure: Typical fixture time is 2 to 10 seconds under the listed UV lamp conditions.
- Medium-Viscosity Placement: Viscosity is 3,000 to 5,000 mPa s at 25 deg C and 20 rpm.
- High-Elongation Cured Bond: The cured adhesive reaches 110% elongation with 13 N/mm^2 tensile strength.
Applications
Applications include bonding polycarbonate, acrylic, and other supported plastics, including assemblies with different coefficients of thermal expansion.
Technical Specifications
No specifications available.
Additional Information
As-supplied / before-processing properties
Fixture time depends on lamp output, distance, and substrate transmission.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Chemical composition | Methacrylate ester | As supplied | |
| Appearance | Colorless, clear | As supplied | |
| Viscosity | 3,000 to 5,000 | mPa s | At 25 deg C; 20 rpm |
| Viscosity | 12,000 to 25,000 | mPa s | At 25 deg C; 2.5 rpm |
| Specific gravity | 1.1 | As supplied | |
| Typical fixture time | 2 to 10 | seconds | Listed UV lamp conditions |
| Cure wavelength | 365 to 420 | nm | Match lamp output to the photoinitiator |
After-processing / final-state properties
Values are typical cured properties for the stated methods and substrates.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Overlap shear strength - polycarbonate | >9 | N/mm^2 | ISO 4587; substrate failure observed |
| Overlap shear strength - acrylic | >1.5 | N/mm^2 | ISO 4587; substrate failure observed |
| Tensile strength | 13 | N/mm^2 | ISO 37 |
| Elongation at break | 110 | % | ISO 37 |
| Hardness | 55 to 75 | Shore D | ISO 868 |
| Dielectric strength | 25 to 30 | kV/mm | Typical cured value |
| Dielectric constant | 4 | 1 MHz at 25 deg C | |
| Water absorption | <5 | % | ISO 62; 2 hours in boiling water |
