Structural Adhesive

EC-3448

- 2 -

Overlap Shear – Aluminum to Aluminum

All properties were measured on 1" wide 1/2" overlap specimens cut from .063" thick

4" x 7" bonded panels of 2024T-3 clad aluminum. Tests conducted according to

MMM-A-132 methods.

Product Performance

Test Temperature

Overlap Shear Strength

-67°F

5500 psi

75°F

6000 psi

180°F

4700 psi

250°F

2000 psi

T-Peel – Aluminum to Aluminum

T-Peel specimens were prepared from .020" thick x 8" x 8" bonded panels of 2024T-3

clad aluminum from which 1" wide strips were cut for testing. Tests conducted

according to MMM-A-132.

Test Temperature

T-Peel Strength

75°F

30 lb./inch

Floating Roller Peel – Aluminum to Aluminum

Roller Peel specimens were prepared from .025" thick and .063" thick panels of 2024T-3

bare aluminum from which 1/2" wide strips were cut for testing. Tests conducted

according to ASTM D-3167.

Test Temperature

Roller Peel Strength

-67°F

63 lb./inch

75°F

63 lb./inch

200°F

64 lb./inch

Hot/Wet Strength – Graphite to Graphite Laminate Bonds

Hot/Wet Exposure: 1 inch wide bonded specimens were placed in a humidity cabinet at

160°F for the time and humidity specified below. Water boil specimens were immersed

in boiling water.

Overlap Shear Strength After Hot/Wet Exposure

Test

100% R.H.

90% R.H.

48 Hours

Temperature

Control

for 18 Weeks

for 9 weeks

Water Boil

-67°F

2980 psi

3270 psi

2840 psi

75°F

4550 psi

3685 psi

4110 psi

160°F

4130 psi

2050 psi

2680 psi

180°F

3360 psi

1140 psi

1120 psi

2010 psi

weight gain

of specimens

2.06%

1.18%

Substrates: Woven graphite epoxy laminate, .062 inch thick.

Surface Preparation: Nylon peel ply was removed from surface followed by light sanding with 180 grit sandpaper and

rinsed with methyl ethyl ketone.*

*Note: When using solvents, extinguish all ignition sources and follow the manufacturer’s precautions and directions for use.

Layup: 0.5 inch overlap shear with a thin nylon knit scrim in the bondline as a spacer.

Cure: 250°F for 90 minutes, 10 psi pressure, 10°F rise rate/minute.

Test: Specimens were tested immediately upon removal from the humidity cabinet at 0.05 inches/minute.