Contact a Sales Rep
Our apologies...
An error has occurred while submitting. Please try again later...
Thank you!
Your form was submitted successfully. A member of our team will be in touch.
3M™ Scotch-Weld™ Structural Adhesive Film AF 191
- | Select product options for IDs.
Close
Thank You
Thank you for contacting 3M. A representative will contact you shortly.
Our Apologies...
An error has occurred while submitting. Please try again later...
Details
Highlights
- Designed for 350°F cure (175°C)
- Adhesive can be cured from 275°F (135°C) up to 350°F (175°C)
- Excellent elevated temperature performance
- Unsupported version available for reticulation
- High-fracture toughness and peel strength
- Available with lightweight conductive screen for lightning strike/composite surfacing
Our 3M™ Scotch-Weld™ Structural Adhesive Film AF 191 encompasses a family of thermosetting modified epoxy adhesives in film form that provide long-term durability and meet specific challenges for metal and composite solid panel and honeycomb sandwich construction, where high fracture toughness and peel strength is required.
Scotch-Weld AF 191 can be reticulated for bonding acoustic panels used in engine nacelles
3M™ Scotch-Weld™ Structural Adhesive Film AF 191 provides excellent performance with easy-to-use shop handling properties. These adhesive films are available in a variety of weights and carriers to meet a range of needs without imposing excess material costs. With high fracture toughness and peel strength, AF 191 provides a reliable, long-term bond suitable for composites, metals in solid panel and honeycomb sandwich fabrication. We also offer an unsupported version, which can be used for reticulation. It is also compatible with multiple substrates and primers. In addition, AF 191 exhibits excellent pre-bond humidity performance on composite substrates.
The following 3M primers are compatible with AF 191:
- 3M™ Scotch-Weld™ Structural Adhesives Primer EW-5000
- 3M™ Scotch-Weld™ Structural Adhesives EW-5000 AS
- 3M™ Scotch-Weld™ Structural Adhesives EC-3917
Our heat-curing, easy handling film is designed to meet numerous customer specs in aerospace manufacturing. AF 191 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 350°F (-55°C to 175°C) for use in multiple designs through multiple environments.
Many of 3M's adhesive films are designed to bond composite panel or honeycomb sandwich panels for a variety of structural applications
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.
See 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. Creating efficiencies, reducing process times and lowering aircraft weight is how we execute our never-ending mission to offer best-in-class adhesives, sealants and other products that effectively reduce costs on multiple fronts.
Learn More about 3M Aerospace
3M™ Scotch-Weld™ Structural Adhesive Film AF 191
| Structure | Product | Color | Film Weight (± .005 lb/ft²) |
Film Weight (± 24.4 g/m²) |
Film Thickness (mils) |
Recom. Cure Temp |
Recom. Cure Time |
Volatile Content |
Size | Stock Number |
|---|---|---|---|---|---|---|---|---|---|---|
| Unsupported | AF 191U | Clear | 0.055 | 244 | 8 | 350°F (177°C) |
1 Hour | Less than 1.5% |
36in x 3yds 36in x 50yds |
62-3072-5306-2 62-3072-5309-6 |
| AF 191U | Clear | 0.035 | 170 | 6 | 36in x 3yds 36in x 50yds |
62-3053-5306-2 62-3053-5309-6 |
||||
| AF 191U | Clear | 0.015 | 73 | 2.5 | 48in x 3yds 48in x 36yds |
62-3068-6006-5 62-3068-6005-7 |
||||
| Matte Scrim | AF 191M | Pale Yellow |
0.060 | 293 | 10 | 350°F (177°C) |
1 Hour | Less than 1.5% |
36in x 3yds 36in x 50yds |
62-2608-5305-6 62-2608-5301-5 |
| AF 191M | Amber | 0.035 | 170 | 6 | 36in x 3yds 36in x 50yds |
62-3151-5306-4 62-3151-5309-8 |
||||
| AF 191M | Amber | 0.030 | 146 | 5 | 36in x 3yds 36in x 50yds |
62-2707-5306-4 62-2707-5309-8 |
||||
| Knit Scrim | AF 191K | Clear | 0.100 | 488 | 16 | 350°F (177°C) |
1 Hour | Less than 1.5% |
36in x 3yds 36in x 50yds |
62-3142-5306-3 62-3142-5309-7 |
| AF 191K | Amber | 0.080 | 390 | 13 | 36in x 3yds (Lt Green Liner) 36in x 50yds (Yellow Liner) |
62-3384-5305-3 62-3384-5309-5 |
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 |
| Application | Bonding, Structural Bonding, Surfacing |
| Cure Rate | 1 hr |
| Curing Temperature (Celsius) | 177 ℃ |
| Curing Temperature (Fahrenheit) | 350 ℉ |
| Maximum Cure Conditions (Celsius) | 200 ℃ |
| Maximum Cure Conditions (Fahrenheit) | 400 ℉ |
| Maximum Operating Temperature (Celsius) | 175 ℃ |
| Maximum Operating Temperature (Fahrenheit) | 350 ℉ |
| Minimum Cure Conditions (Celsius) | 135 ℃ |
| Minimum Cure Conditions (Fahrenheit) | 275 ℉ |
| Minimum Operating Temperature (Celsius) | -55 ℃ |
| Minimum Operating Temperature (Fahrenheit) | -67 ℉ |
| Nominal Adhesive Thickness (Imperial) | 2.5 mil, 6 mil, 8 mil, 10 mil, 13 mil, 16 mil |
| Nominal Adhesive Thickness (Metric) | 0.064 mm, 0.152 mm, 0.203 mm, 0.254 mm, 0.33 mm, 0.406 mm |
| Nominal Weight (Imperial) | 0.015 lb/ft², 0.03 lb/ft², 0.035 lb/ft², 0.055 lb/ft², 0.06 lb/ft², 0.08 lb/ft², 0.1 lb/ft² |
| Product Color | Tan |
| Product Form | Roll |
| Storage Environment | Freezer Storage |
| Substrate | Metal, Composite |
| Overall Length (Imperial) | 18 yd, 25 yd, 36 yd, 40 yd, 50 yd |
| Overall Length (Metric) | 16 m, 22.9 m, 33 m, 36.576 m, 45.7 m |
| Overall Width (Imperial) | 14 in, 18 in, 36 in, 42 in, 48 in |
| Overall Width (Metric) | 0.9 m, 1.1 m, 1.2 mm, 356 m, 457 mm |
Resources
Regulatory Data Sheet
Document Number: MSDS_1133073_US_EN_RDS
(PDF)
