UV640 Plastic Bonding UV-Curable Adhesive, Clear

Physical Properties of Uncured Adhesive

• Chemical composition: Methacrylate ester
• Appearance: Colourless, clear
• Viscosity @ 25°C:
  • 20rpm: 3,000-5,000 mPa.s (cP)
  • 2.5rpm: 12,000-25,000 mPa.s (cP)
• Specific gravity: 1.1

Typical Curing Properties

• Typical fixture time (PMMA)*:
  • Low power 4mW/cm² battery lamp: 10secs
  • LED 100mW/cm² lamp: 4 secs
  • UV light guide 30W/cm²: 2 secs
• Cure wavelength: 365 - 420 nm**

*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 to match the LED lamp's peak wavelength with that of the adhesive's photoinitiator to ensure optimal adhesive cure.

Typical Performance of Cured Adhesive

• Overlap shear strength (ISO4587):
  • Polycarbonate: >9 N/mm² (>1300 psi)*
  • Acrylic: >1.5 N/mm² (>220 psi)*
• Tensile strength (ISO37): 13 N/mm² (1900 psi)
• Refractive index: >1.490
• Elongation at break (ISO37): 110%
• Hardness (ISO868): 55-75 Shore D
• Dielectric strength: 25-30 KV/mm
• Dielectric constant 1MHz@25°C: 4
• Water absorption (ISO62) 2 hours in boiling water: <5%

*Substrate failure was observed