PERMABOND® UV643 is a thixotropic, extremely fast UV-curable acrylic adhesive developed for the fast bonding of many rigid plastics, also in combination with metals. It cures tack-free and provides excellent performance on several thermoplastics including polycarbonate, PMMA PETG, PET, ABS, and rigid PVC. It also provides high durability when exposed to hot/wet conditions (i.e. tested at +85°C/85% RH).
FEATURES:
- Excellent strength on PC, PVC, and other rigid plastics
- Tack-free surface cure
- Very quick cure at wavelengths from 365 to 420 nm, good on stabilized plastics
- Exceptional resistance to warm and humid conditions
- Excellent resistance to thermal cycles on plastic assemblies
- Resists yellowing
Physical Properties of Uncured Adhesive
| Chemical composition | Urethane acrylate |
| Appearance | Pale yellow (colorless when cured) |
| Viscosity @ 25°C | 20rpm: 2000 mPa.s (cP) 2rpm: 17,600 mPa.s (cP) |
| Specific gravity | 1.0 |
Typical Curing Properties
| Typical fixture time (acrylic)* | Mercury short arc lamp 330 mW/cm²: <1 secs UV LED 400nm 150 mW/cm²: <1 secs UV LED 400nm 0.1m W/cm²: 19 secs |
| Cure wavelength | 365 – 420 nm** |
Typical Performance of Cured Adhesive
| Overlap shear strength | Polycarbonate: 13 N/mm² (1885 psi)* Acrylic: 7 N/mm² (1015 psi) PETG: 6 N/mm² (870 psi)* PVC: 8 N/mm² (1160 psi)* Aluminium to PC: 10 N/mm² (1450 psi) Mild steel to PC: 10 N/mm² (1450 psi) |
| Tensile strength (ASTM D638) |
23 N/mm² (3336 psi) |
| Elongation at break (ASTM D638) |
50% |
| Elastic modulus (ASTM D638) |
1.2 GPa |
| Hardness (ISO868) | 65 Shore D |
| Linear Shrinkage | 1% |
| Tg (DMA, Tan delta) | 83°C |
| Water absorbtion (ISO62) |
24h at 23°C: 4% 2h in boiling water: 5% |
