Core Splice Adhesive Film

AF 3002

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Product Application

(continued)

B. Aluminum Honeycomb Core

1. Soak in clean aliphatic naphtha* (to conform to TT-N-95A) for five minutes

at room temperature. Dry 10 minutes at 150°F ± 10°F (66°C ± 5°C).

2. Optional – Immerse in etching solutions for two (2) minutes at 50°F ± 5°F

(10°C ± 2°C). Rinse, air dry and force dry in similar manner to skin panels.

*Note: When using solvents, extinguish all ignition sources and follow the

manufacturer’s precautions and directions for use.

II. Film:

Care should be taken to avoid contaminating adhesive and cleaned or primed

aluminum by any substance which will hinder wetting action of the adhesive.

Film Application:

1. Cut portion of film to be used from roll with protective liners in place.

2. Remove liner from one side of film.

3. Place film on metal or edge of honeycomb core using the remaining liner as a

protective cover.

4. On metal surfaces, roll film into position with a rubber roller to insure that no air

is trapped between the film and metal.

5. Remove second protective liner.

6. Assemble parts and cure. Tack if necessary at 120-180°F (49-82°C).

III. Cure Cycle:

A. General

The tack, flow, expansion, and cure initiation temperature for 3M™ Scotch-

Weld Core Splice Adhesive Film AF 3002 is a time-temperature relationship

and depends upon the rate of heat input.

Normally, Scotch-Weld AF 3002 will have the following properties:

Tack Temperature:

120-180°F (49-82°C)

Flow Temperature:

180-250°F (82-121°C)

Cure Initiation Temperature:

250°F (121°C)

For a 50 mil layer of Scotch-Weld AF 3002, a minimum cure temperature of

250°F (121°C), is suggested to affect a useful cure in a reasonable length of

time (approximately 60 minutes).

B. Cure Cycle (Autoclave or Platen Press) for a 50 mil layer of Scotch-Weld

AF 3002.

The following cure cycle is suggested to obtain bond lines which give the

strengths reported in the Test Results section.

Cure Cycle: 50 psi, 10°F/min., 60 min. @ 250°F (121°C) or below. Cool to

200°F (93°C) or below before removing pressure.