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3M™ Scotch-Weld™ Structural Adhesive Film AF 3109-2
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Details
Highlights
- Designed for 250°F (120°C) cure or 350°F (175°C)
- Adhesive can be cured from 225°F (107°C) up to 350°F (175°C)
- Excellent shop handling characteristics
- Excellent pre-bond humidity performance on composite substrates
- Unsupported version available for reticulation
- High-fracture toughness and peel strength
Our 3M™ Scotch-Weld™ Structural Adhesive Film AF 3109-2 encompasses a family of thermosetting modified epoxy adhesives in film form that provides long-term durability and meets specific challenges for metal and composite solid panel and honeycomb sandwich construction, where high fracture toughness and peel strength is required.
| Temperature °F (°C) |
Scotch-Weld AF 3109-2K 0.085 Wt. Scotch-Weld EC-3960 psi (MPa) | Scotch-Weld AF 3109-2K 0.060 Wt. Scotch-Weld EC-3960 psi (MPa) | Scotch-Weld AF 3109-2K 0.045 Wt. Scotch-Weld EC-3960 psi (MPa) | Scotch-Weld AF 3109-2U 0.035 Wt. Scotch-Weld EC-3960 psi (MPa) | Scotch-Weld AF 3109-2U 0.015 Wt. Scotch-Weld EC-3960 psi (MPa) |
|---|---|---|---|---|---|
| -67 (-55) | 5200 (35.9) | 5500 (37.9) | 5700 (39.3) | 5970 (41.2) | 5270 (36.3) |
| 75 (23) | 6075 (41.9) | 5800 (40.0) | 5800 (40.0) | 5600 (38.6) | 5340 (36.8) |
| 250 (121) | 3500 (24.1) | 3400 (23.4) | 2750 (19.0) | 3100 (21.4) | 3200 (22.1) |
| 300 (150) | 1740 (12.0) | 1600 (11.0) | 1400 (9.7) | 1833 (12.6) | 2000 (13.8) |
The following 3M primers are compatible with AF 3109-2:
3M™ Scotch-Weld™ Structural Adhesives Primer EW 5000
3M™ Scotch-Weld™ Structural Adhesives Primer EW 5000 AS
3M™ Scotch-Weld™ Structural Adhesives Primer EC 3917
3M™ Scotch-Weld™ Structural Adhesives Primer EC 3924 B
Our heat-curing, easy handling film is designed to meet numerous customer specs in aerospace manufacturing. AF 3109-2 supplies high fracture toughness and peel strength through a spectrum of environmental conditions and is easy to work with. Once cured it provides high bond strength from -67°F to 300°F (-55°C to 150°C) for use in multiple designs through multiple environments.
AF 3109-2 was designed for bonding honeycomb and metal-to-metal & composite components, where high strength is required
The fewer rivets you have in your aircraft the better. Structural adhesive films enable the designer to get more innovative with their parts, and reduce the overall number of rivets required on your structure. This thermosetting modified epoxy in film form can be used for bonding a wide variety of substrates, including metal, honeycomb and composite. Structural Adhesive Films come in a variety of weights and thicknesses, minimizing the weight while maintaining the structural integrity.
The films are available in supported versions, which are typically used for monolithic bonding or honeycomb sandwich. They are also available in unsupported form for reticulation onto honeycomb. These films can be cured from temperatures as low as 180°F to as high as 350°F. Because these films are less messy and don't required mixing, they offer efficiencies in the design process. They are easier to use than typical paste adhesives.
Compare More 3M Structural Adhesive Films
3M is on the Leading Edge of Innovation
Adhesive bonding enables a more lightweight structure because it allows you to use more lightweight composite, as opposed to the metallic materials that were used in previous designs. Structural adhesive films are employed anywhere you are trying to bond metal to composite. This offers good erosion performance while minimizing weight.
Our Best for Your Best
3M is proud to partner with organizations across the spectrum of aerospace and related industries. Enabling efficiencies, reducing process times and lowering aircraft weight is how we execute our never-ending mission to offer best-in-class adhesives, sealants, surface protection products and composite resins that effectively reduce costs on multiple fronts. Professionals across the industry know the numerous advantages of 3M Aerospace. Our brand is widely recognized for the highest standards of quality and performance, adding value to the final results. By engineering reliability, longevity and value into all of our products, we have a history of saving money by reducing waste, rework and time.
Find what you need in our aerospace specification portal.
3M maintaints partnerships with every major aircraft OEM in the world. Find your spec today.
Typical properties
| Adhesive Type | Epoxy Film Adhesive, Epoxy |
| Application | Bonding, Structural Bonding, Surfacing |
| Cure Rate | 1 hr |
| Factory ISO Certification | No ISO Certification information available |
| Maximum Cure Conditions (Celsius) | 177 ℃ |
| Maximum Cure Conditions (Fahrenheit) | 350 ℉ |
| Maximum Operating Temperature (Celsius) | 150 ℃ |
| Maximum Operating Temperature (Fahrenheit) | 300 ℉ |
| Minimum Cure Conditions (Celsius) | 107 ℃, 121 ℃ |
| Minimum Cure Conditions (Fahrenheit) | 224.6 ℉, 250 ℉ |
| Minimum Operating Temperature (Celsius) | -55 ℃ |
| Minimum Operating Temperature (Fahrenheit) | -67 ℉ |
| Nominal Weight (Imperial) | 0.015 lb/ft², 0.035 lb/ft², 0.045 lb/ft², 0.06 lb/ft², 0.085 lb/ft² |
| Product Color | Blue |
| Storage Environment | Freezer Storage |
| Substrate | Metal, Composite |
| Overall Length (Imperial) | 25 yd, 36 yd, 50 yd |
| Overall Length (Metric) | 22.9 m, 33 m, 45.7 m |
| Overall Width (Imperial) | 36 in, 48 in |
| Overall Width (Metric) | 0.9 m, 1.2 m |
Resources
Safety Data Sheets
Document Number: MSDS_1062512_US_EN
(PDF)
