Structural Core Splice Adhesives

AF 3028 • AF 3028 FR

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Product Performance

1. Volatile Content:

The volatile content for AF 3028 and AF 3028 FR was determined by measuring

the weight loss of a of 4" x 4" square sample of adhesive during cure (3M AdhD

Test Method C-286). The polyethylene separating liner was removed prior to cure.

Cure time was 1 hour.

250°F (121°C) Cure

350°F (176°C) Cure

Volatile content for AF 3028:

Less than 1%

Less than 1%

Volatile content for AF 3028 FR:

Less than 1%

Less than 1%

2. Cured Density:

The free film cured density for AF 3028 and AF 3028 FR was determined by

weighing 1" x 1" cured specimens and dividing by the volume of the specimens

(3M AdhD Test Method C-2310). Specimens were cured for 1 hour at 250°F

(121°C), 4-6°F rise rate/minute.

AF 3028

AF 3028 FR

Cured Density (Typical)

3. Expansion During Cure:

The free film expansion ratio for AF 3028 and AF 3028 FR was determined by

dividing the average cured thickness of the cured density specimens by the average

original (uncured) thickness (3M AdhD Test Method C-286).

Cure Cycle:

250°F (121°C), 60 minutes

350°F (176°C), 60 minutes

4-6°F/minute

4-6°F/minute

0 PSIG

0 PSIG

AF 3028

AF 3028 FR

AF 3028

Expansion Ratio (Typical):

1.8

2.1

1.9

4. Slump or Sag:

Sag during cure was measured by laminating a 4" x 4" piece of adhesive to an

8" x 8" x 0.020" clean aluminum panel. It was then placed in a vertical position with

the bottom edge horizontal. A scribe line was made along the bottom 4" edge of the

adhesive. This assembly was cured as given below and slump or sag is the distance

the adhesive flowed beyond the scribe line (3M AdhD Test Method C-277).

Cure Cycle:

250°F (121°C), 90 minutes

350°F (176°C), 90 minutes

4-6°F/minute

4-6°F/minute

0 PSIG

0 PSIG

AF 3028

AF 3028 FR

AF 3028

Sag or Slump (Typical):

0.03" (0.8 mm) 0.02" (0.5 mm)

0.03" (0.8 mm)