3M AF42
Harmonization Code : 3506.10.00.00 | Prepared glues and other prepared adhesives, not elsewhere specified or included; products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg
Main features
- Clear Structural Bondline
- Clean Non Tack Layup
- High Peel Toughened Film
Product Description
3M Thermal Bonding Film AF42 is a translucent, non-tacky epoxy thermoset film for structural attachment of metal, glass, and engineering-grade substrates in electronics assemblies. The 3 mil adhesive layer is supplied on a 6.5 mil brown paper liner for clean cutting and placement. Low flow supports bondline control during heat cure, and the adhesive cures clear. A 60 minute cure at 177 deg C develops the final bond, while alternate higher-temperature cycles support shorter processing times.
Key features
- Clear Cured Bondline: The translucent film cures to a clear structural adhesive layer.
- Non Tack Low Flow Handling: The preformed film supports clean placement and controlled flow during cure.
- Heat Cured Structural Bonding: The epoxy film bonds compatible metals, glass, and engineering substrates.
Applications
Electronics assembly bonding, metal and glass attachment, and structural film bonding with a compatible heat-cure process.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Mechanical Properties
Additional Information
As-supplied / before-processing properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Base resin | Epoxy | - | As supplied |
| Adhesive thickness | 3 | mil | Nominal |
| Liner thickness | 6.5 | mil | Brown paper liner |
| Tack | None | - | At room temperature |
| Color | Translucent | - | Before cure |
| Room-temperature work life | 4 | weeks | At 21 deg C |
| Shelf life | 15 | months | Stored at 4 deg C |
After-processing / final-state properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Color | Clear | - | After cure |
| Tensile strength | 4800 | psi | Cured film |
| Elongation | 250 | % | Cured film |
| Modulus | 65000 | psi | Cured film |
| Overlap shear on etched aluminum | 4600 | psi | ASTM D1002; 3 mil bondline |
| Overlap shear on FR-4 | 2500 | psi | ASTM D1002; solvent-wiped substrate |
