Core Splice Adhesive Film

AF 3002

- 5 -

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

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

6. Tube Shear Strength:

The tube shear strength has been determined on 3M™ Scotch-Weld™ Core Splice

Adhesive Film using the procedure outlined in 3M Test Method C-280. Tube shear

specimens are prepared by placing 45 ± 0.2 grams of Scotch-Weld AF-3002

between the walls of two 9 inch long tubes and curing in an oven.

Core Splice Adhesive

Outer Tube – 1" OD, 0.049" thick

5052-0 bare

Inner Tube – 1/2" OD, 0.049" thick

5052-0 bare

Test Specimen

Tube Shear (PSI) =

P

0.784

Cure Cycle A: 250°F (121°C) – 0 psig – 120 min. – 7.5°F/min. warmup.

Cure Cycle B: 350°F (177°C) – 0 psig – 60 min. – 7.5°F/min. warmup.

Tube Shear Strength

Test Temperature

Cure Cycle A

Cure Cycle B

75°F (24°C)

1520 psi

2200 psi

350°F (177°C)

920 psi

1200 psi

Tube Density (determined by dividing the volume inside the tubes by the weight of

Scotch-Weld AF 3002) = 43 lbs./cu. ft.

Product Performance

(continued)

Product Application

The product performance data were developed using the following suggested procedures.

I. Surface Preparation

A thoroughly cleaned, dry, grease-free surface is recommended for maximum

performance. Cleaning methods which will produce a breakfree water film on metal

surfaces are generally satisfactory.

A. Aluminum Skins (3M Company optimized FPL etch, 3M Test Method C-2803).

1. Vapor Degrease – Suspend skins in condensing vapors of perchloroethylene for

5 minutes.

2. Alkaline Degrease – Immerse skins in Oakite No. 164 solution (9-11 oz./gallon

water) at 180°F - 200°F (82°C - 93°C) for 10-12 minutes. Rinse in generous

quantities of clear, running water.

3. Acid Etch – Place panels in the following solution for 10 min. at 150°F ± 5°F

(66°C ± 2°C).

4.1 - 4.9 oz./gallon

Sulfuric Acid, 66° Be

38.5 - 41.5 oz./gallon

2024T-3 aluminum (dissolved)

0.2 oz./gallon minimum

Tap Water as needed to balance

Caution: Use adequate respiratory, eye and skin protection when using etch

solutions.

4. Rinse – Rinse face sheets in clear running tap water.

5. Dry – Air dry 15 minutes; force dry 10 minutes with parts at 150°F ± 10°F

(66°C ± 5°C).