Structural Adhesive Film AF 191

Technical Datasheet

- 6 -

11. Effect of Composite Post Cure Cycles of 400°F (205°C) and 450°F (232°C)

that require post cure at 400°F (205°C) or 450°F (232°C) is shown below. Scotch-Weld AF 191 Film was first

cured for 1 hour at 350°F (177°C) using a 4-5°F (2.2-2.7°C) rise rate and 45 psi (0.31 MPa) and FPL Etched

2024-T3 alclad 0.063" thick using 3M™ Scotch-Weld Structural Adhesive Primer EC-3917. Scotch-Weld AF

191 Film was then exposed to the post cures specified below to simulate different composite cure cycles.

Overlap Shear Strength @ -67, 75, 350, and 400°F Test Temperature

Hours Exposed At

Test

-67°F

(-55°C)

75°F

(23°C)

350°F

(177°C)

400°F

(204°C)

400°F (204°C):

Temperature

psi

(MPa)

psi

(MPa)

psi

(MPa)

psi

(MPa)

Control

(Zero Hours)

4400

(30.3)

4897

(33.8)

2800

(19.3)

1750

(12.1)

2 Hours

4450

(30.7)

4896

(33.8)

2870

(19.8)

2106

(14.5)

4 Hours

4503

(31.1)

4866

(33.6)

2960

(20.4)

2273

(15.7)

6 Hours

4433

(30.6)

4772

(32.9)

2910

(20.0)

2190

(15.1)

Hours Exposed At

Test

-67°F

(-55°C)

75°F

(23°C)

350°F

(177°C)

400°F

(204°C)

450°F (232°C):

Temperature

psi

(MPa)

psi

(MPa)

psi

(MPa)

psi

(MPa)

Control

(Zero Hours)

4400

(30.3)

4897

(33.8)

2800

(19.3)

752

(5.2)

2 Hours

4500

(31.0)

4789

(33.0)

2846

(19.6)

846

(5.8)

4 Hours

4263

(29.4)

4617

(31.8)

2953

(20.4)

816

(5.6)

6 Hours

4226

(29.1)

4582

(31.6)

2600

(17.9)

793

(5.5)

Typical Product

Performance (continued)

Peel Strength At 75°F (23°C)

Hours Exposed At

400°F (204°C)

Honeycomb Peel

Floating Roller Peel

Control

in•lb

(cm•N/cm)

piw

(N/25 mm)

3"

(Zero Hours)

46

(68)

28

(125)

2 Hours

28

(42)

20

(89)

4 Hours

28

(42)

25

(111)

6 Hours

27

(40)

17

(76)

Hours Exposed At

450°F (232°C)

Control

in•lb

(cm•N/cm)

piw

(N/25 mm)

3"

(Zero Hours)

46

(68)

28

(125)

2 Hours

29

(43)

23

(102)

4 Hours

30

(44.5)

27

(120)

6 Hours

30

(44.5)

23

(102)

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

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