Technical Data Sheet

3M Scotch-Weld™ Structural Adhesive Film AF 143-2

II. Primer Application

3M™ Scotch-Weld™ Structural Adhesive Primer EC-3917 corrosion inhibiting primer has been successfully used with

3M™ Scotch-Weld™ Structural Adhesive Film AF 143-2 using the following procedure:

Spray Application: Refer to the Scotch-Weld EC-3917 Primer Product Specification Sheet for equipment and technique.

Primer Dry Cycle: Air Dry: 30 minutes at ambient temperature.

Force Dry: 60 minutes at 250°F (121°C) in an air circulating oven.

Primer Thickness: Approximately 0.1 mils dry.

Caution: Scotch-Weld EC-3917 is flammable. See Primer Introductory Data Sheet for application techniques and

precautionary measures.

III. Adhesive Layup

Care should be taken to avoid contaminating adhesive and cleaned aluminum by any substance which will hinder

wetting action of the adhesive.

A. Film Application

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

2. Remove paper liner from one side of the film.

3. Place film on metal using a separating liner as a protective cover.

4. Roll film into position with a rubber roller, insuring that no air is trapped between film and panel.

5. Remove second protective liner.

6. Assemble parts and cure.

IV. Cure Cycle

A cure of 60 minutes at 350°F (177°C) and 45 ± 5 psi pressure is suggested where maximum results are desired.

Cure Cycle (Autoclave or Platen Press)

The following cure cycle has been used to obtain dense glue lines.

Cure Cycle (Autoclave or Platen Press)

Cure Cycle

1. Bonding pressure: Apply before starting

rise rate cycle and maintain throughout.

45 ± 5 psi

2. Bond line temperature rise rate.

4 to 5°F (2 to 3°C) / minute

3. Cure.

60 minutes at 350°F (177°C)

4. Temperature at which pressure is

released.

200°F (93°C) or below

Product Performance

Note:

The following technical information and data should be considered representative or typical only and should not be

used for specification purposes.

The following product performance data has been obtained in the 3M Laboratory under the conditions specified. Test

specimens are prepared using the general application methods and procedures described in the product application

section of this data sheet.

All data reported in this section were developed using 3M™ Scotch-Weld™ Structural Adhesive Primer EC-3917 primed

aluminum panels and an adhesive cure of 60 minutes at 350°F (177°C) and 45 psi. A 4-5°F (2-3°C) minute rise rate to

cure temperature was used. Parts were cooled below 200°F (93°C) before removing from autoclave.