3M™ Scotch-Weld™ 7271 B/A
3M™ Scotch-Weld™ Hybrid Adhesive SW7271 is a two-part, 1:1 mix ratio, epoxy/acrylate structural adhesive with a 15 minute work life. It exhibits excellent shear and tensile strengths along with high temperature performance and durability on little or non-prepared surfaces, e.g. aluminum and reinforced polyester and epoxy laminates.
Typical Uncured Physical Properties
Property | Accelerator(Part A) | Base(Part B) |
Chemical Type | mod. Amine | mod. Epoxy |
Color | Blue | Yellow |
Density(g/cm3) | 1.04 | 1.35 |
Viscosity mPas | 1.04 | 1.35 |
Mix Ratio(Volume) | 1 | 1 |
Mix Ratio(Weight) | 1 | 1.3 |
Worklife at 23°C | 22 Minutes | |
Glass beads for bond line control | Yes, diameter 180-300μm | |
Time to Handling Strength(0.35MPa at 23°C) | 60 Minutes | |
Full Cure time (at 23°C) | 2 days @ 23°C |
Typical Cured Physical Properties
Color | Green |
Tg (°C) by DMTA | 59.0 |
onset point by DMTA | 45.6 |
Shore D Hardness | 78 |
Stress at peak load(MPa) | 2.7 |
Young’s modulus(MPa) | 38.8 |
G modulus(MPa) | 2360 |
Elastic region(%) | 230 |
Poisson ratio | 1.0-0.4 |
Temperature range | -40°C to 120°C |