Structural Adhesive Film AF 191

Technical Datasheet

- 5 -

8. High Temperature Durability Data – Metal to Metal Overlap Shear

Bonds were made on 2024-T3 FPL etched and primed aluminum and exposed at 350°F (177°C). Overlap shear

values were obtained at 75°F (23°C) and at 350°F (177°C) as indicated below.

Overlap Shear

Hours of Exposure

Test Temperature

at 350°F (177°C)

75°F

(23°C)

350°F

(177°C)

Hours

psi

(MPa)

psi

(MPa)

0

5150

(35.5)

2367

(16.3)

1000

3967

(27.4)

2960

(20.4)

2500

3606

(24.9)

3046

(21.0)

6000

3050

(21.0)

3020

(20.8)

11000

2973

(20.4)

2920

(20.1)

17120

2740

(18.9)

2760

(19.0)

26000

2480

(17.1)

2470

(17.0)

34320

2015

(13.9)

2440

(16.8)

9. Prebond Humidity Resistance (relative humidity exposure before cure)

relative humidity and 77°F (23°C) for the number of days specified below before bonding using 3M™

Scotch-Weld™ Structural Adhesive Primer EC-3917.

Test

Properties

Temp.

Control

2 Days

4 Days

7 Days

8 Days

10 Days

Overlap Shear

75°F

4800

4666

4666

4646

4433

4406

(SW EC-3917 Primer) (psi)

350°F

2726

2543

2646

2773

2633

2573

Floating Roller Peel

75°F

27

26

23

21

20

17

(SW EC-3917 Primer) (piw)

Honeycomb Peel

75°F

35

35

35

36

35

32

3/8" cell

(in•lb)

3"

Flatwise Tensile

75°F

1050

—

1022

1046

—

—

(psi) (3/8" cell)

300°F

406

—

438

392

—

—

Overlap Shear — 2024-T3 clad 4" x 7" x .063". FPL etched and primed with Scotch-Weld EC-3917 Primer.

Floating Roller Peel — 2024-T3 bare 3" x 8" x .063" and 3" x 10" x .025" FPL etched and primed with Scotch-Weld EC-3917 Primer.

Honeycomb Peel – 2024-T3 clad, 8" x 3" x .020" face sheet, 3/8" cell, 5056 alloy, 5/8" thick, 3 mil foil, NP, CI type.

Flatwise Tensile — 2024-T3 bare, 8" x 8" x .020" FPL etched and primed with Scotch-Weld EC-3917 Primer.

Typical Product

Performance (continued)

Note: The following technical information and data should be considered representative

or typical only and should not be used for specification purposes.

10. Prebond Open Time Data

for the number of days specified below before bonding using Scotch-Weld EC-3917 Primer. For flatwise tensile

specimens, the film was reticulated after 50% of specified aging and completed aging on the core.

Test

Properties

Temp.

Control

7 Days

10 Days

psi

(MPa)

psi

(MPa)

psi

(MPa)

Wide Area Lap Shear

75°F (23°C)

3300

22.8

3413

23.5

3326

22.9

350°F (177°C)

2326

16.0

2357

16.3

2200

15.2

Flatwise Tensile

75°F (23°C)

836

5.8

811

5.6

—

—

350°F (177°C)

272

1.9

297

2.0

—

—

Wide Area Lap Shear – 2024-T3 clad. 6" x 8" x .063" panel FPL etched and primed with Scotch-Weld EC-3917 Primer.

Flatwise Tensile – 2024-T3 clad 8" x 8" x .032" panel FPL etched and primed with Scotch-Weld EC-3917 Primer.

Core – 5052 alloy, 3/8" cell, 4 mil foil, 5/8" thick, NP, CI.