Product Introduction of 3M Scotch-Weld Structural Adhesive Film AF 31
Our 3M Scotch-Weld Structural Adhesive Film AF 31 is a yellow-colored adhesive film that provides long-term durability and meets specific challenges for metal-to-metal bonded structures where high temperature performance is desired.
3M™ Scotch-Weld™ Structural Adhesive Film AF 31 provides excellent performance with easy-to-use shop handling properties. With good peel strength, AF 31 provides reliable, long-term durability and meets the specific challenges of metal-to-metal bonded structures.
The following 3M primer is compatible with AF 31:
- 3M™ Scotch-Weld™ Structural Adhesives Primer EC-2174
AF 31 supplies 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 500°F (-55°C to 260°C) for use in challenging designs in multiple environments.
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 require mixing, they offer efficiencies in the design process. They are easier to use than typical paste adhesives.
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.
Key Features
- Designed for 350°F (175°C) cure
- Good flexibility and shear strength at service temperatures from -67°F to 500°F (-55°C to 260°C)
- Easy application in a film form which can be pressure, heat or solvent tacked in position
- Excellent retention of strength after aging in many environments
- Yellow in color
- Suitable for metal-to-metal bonding
- Compatible with 3M™ Scotch-Weld™ Structural Adhesives Primer EC-2174
- Provides high bond strength across a wide temperature range
- Offers reliable peel strength in challenging conditions
- Minimizes rivet usage for lightweight structural designs
Key Applications
- Metal-to-metal bonding in aerospace and industrial applications
- Bonding for structural components exposed to high temperatures
- Monolithic bonding and honeycomb sandwich structures
- Applications requiring high shear and peel strength under extreme temperatures
- Structural bonding where minimal adhesive mess and easy handling are needed
- Aircraft component fabrication requiring reduced rivet usage
- Designs demanding long-term durability and environmental resistance
About Prostech
Prostech offers specialty materials (adhesives, tapes, thermal interface materials, insulating materials, sealants, PCB protection materials, …) along with manufacturing solutions. We proudly serve a wide range of industries and are an authorized distributor for leading global manufacturers of industrial materials and equipment. Our product range is designed to deliver customized solutions that address each customer’s unique needs.
With years of experience and a successful project history, we are confident in our ability to provide comprehensive material solutions. These solutions effectively tackle the challenges manufacturers face. To explore our full product catalog, simply click here. Our dedicated team is ready to assist with:
- Provide quotation, sample, TDS/MSDS, and technical consultation
- Testing sample quality and verifying product compatibility in our laboratory
- Customizing material formulas for special applications
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| Property | Value |
|---|---|
| Adhesive Type | Nitrile Phenolic |
| Application | Bonding |
| Cure Rate | 1 hr |
| Curing Temperature (Celsius) | 175 ℃, 177 ℃ |
| Curing Temperature (Fahrenheit) | 350 ℉ |
| Maximum Operating Temperature (Celsius) | 260 ℃ |
| Maximum Operating Temperature (Fahrenheit) | 500 ℉ |
| Minimum Operating Temperature (Celsius) | -55 ℃ |
| Minimum Operating Temperature (Fahrenheit) | -67 ℉ |
| Nominal Adhesive Thickness (Imperial) | 10 mil |
| Nominal Adhesive Thickness (Metric) | 0.254 mm |
| Product Color | Yellow |
| Product Form | Roll |
| Storage Environment | Refrigeration Storage |
| Substrate | Metal |
| Overall Length (Imperial) | 36 yd |
| Overall Length (Metric) | 33 m |
| Overall Width (Imperial) | 6 in, 11.5 in, 20 in |
| Overall Width (Metric) | 152 mm, 292 mm, 508 mm |
