AF3074FST

AF3074FST 3M | Alldatasheet

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3M™ Scotch-Weld™ AF 3074 FST Structural Core Splice Film Preliminary Technical Data Sheet Product Description 3M™ Scotch-Weld™ AF (Adhesive Film) 3074 FST (Fire Smoke and Toxicity) is an epoxy based, 250°F to 350°F (120°C to 180°C) curable, structural core splice adhesive film which expands during cure. AF 3074 FST was designed for typical aircraft applications in interior and structural areas, e.g. filling mismatch areas or reinforcing and splicing honeycomb core. Key Features

• High and repeatable expansion rate
• Flame retardant acc. FAR/JAR/CS 25.853(a) App F, part I(a)(1)(ii).
• Compatible with 250°F and 350°F (120°C to 180°C) cure cycles
• Wide in- service temperature range from -67°F up to 275°F (-55°C up to 135°C)
• Extended shop and shelf life at room temperature Product Characterization Note: The following technical information and data should be considered as representative or typical only and should not be used for specification purposes. General Properties 30 mil version 50 mil version Test Method Color Gray Gray Chemical base Epoxy Epoxy Form Unsupported film Unsupported film Liners Polyethylene (blue) Polyester (red) Polyethylene (yellow) Polyester (red) Thickness 30 mil (0.76 mm) 50 mil (1,27 mm) prEN 2667-3 Mass per unit area 0.184 lb/ft2 (900 g/m²) 0.328 lb/ft² (1600 g/m²) prEN 2667-3 Volatiles content (120 °C cure) < 1 wt.% < 1 wt.% prEN 2667-3 Available packaging sizes Sheets (12 x 16 in) (300 x 400 mm) Sheets (12 x 16 in) (300 x 400 mm

3M™ Scotch-Weld™ AF 3074 FST Product Characterization The following product performance data were obtained with the 50 mil version of Scotch -Weld™ AF 3074 FST using two different cure cycles:

• Cure Cycle A: 60 minutes at 257°F (125°C), heat-up rate 5-7°F/min (3-4°C/min), atmospheric pressure
• Cure Cycle B: 30 minutes at 320°F (160°C), hot-in/hot-out, atmospheric pressure Properties of Cured Film Cure Cycle A Cure Cycle B Test Method Expansion during cure ~ 225 % ~ 125 % prEN 2667-3 Vertical slump 0.02 in (0,6 mm) 0.01 in (0,3 mm) prEN 2667-4 Density of cured film(a) < 0.50 g/cm³ ---- ---- (a) free expansion Tube Shear Strength The tube shear strength was determined on ScotchWeld™ AF 3074 FST using the procedu res outlined in prEN 2667-2. 55g ± 0.2g were placed between the walls of two 9in (230mm) long tubes. After curing under atmospheric pressure, the tubes were cut to individual specimens of 0.5in (12.5mm) height. Tube shear resistance was calculated by the following formula: σ [MPa] = F ÷ πdinnerh Outer and inner tubes: 12.5 mm height, aluminum alloy 5052-0 bare. Outer tube: diameter 25.0 mm, thickness 1.25 mm. Inner tube: diameter 12.5 mm, thickness 1.25 mm. Tube shear strength prEN 2667-2 Test temperature Cure Cycle A -67°F (-55°C)

1883 PSI

(13 MPa) 73°F (23°C) (13 MPa) 176°F (80°C)

1738 PSI

(12 MPa) 275°F (135°C)

1014 PSI

(7 MPa)

3M™ Scotch-Weld™ AF 3074 FST Flammability, Smoke Density and Toxic Gas Emission All specimens for flammability, smoke density and toxic gas emission tests had a thickness of 0.25in. Flammability Properties Requirements Cure Cycle 1 Cure Cycle 2 Flammability 12 sec vertical FAR/JAR/CS 25.853(a) App F, part I(a)(1)(ii) Sample size: 300 x 75 x 6,35 mm³ Burn Length ≤ 200 mm 60 mm ---- After Flame Time ≤ 15 sec 3 sec ---- Drips Exting Time ≤ 5 sec 0 sec ---- Smoke Emission FAR/JAR/CS 25.853(d) App F, part V(b) DS max in 4 min. ≤ 200 Ds Max 131 Ds ---- Toxic Gas Emission Airbus ABD0031 Sample size: 75 x 75 x 6,35 mm³ HF (flaming) ≤ 100 ppm 0 ppm ---- HCL (flaming) ≤ 150 ppm 0 ppm ---- HCN (flaming) ≤ 150 ppm 18 ppm ---- SO2 + H2S (flaming) ≤ 100 ppm 11 ppm ---- CO (flaming) ≤ 1000 ppm 390 ppm ---- NO + NO2 (flaming) ≤ 100 ppm 44 ppm ---- Data are typical values and cannot be taken for specification purpose. All Data were generated in standalone test mode. Handling, Application, Storage I. Precautionary Information Refer to product label and Safety Data Sheet (SDS) for health and safety information before using this product. For SDS visit our website https://www.3m.com/3M/en_US/company-us/SDS-search/. II. Instructions for Use A. Surface Preparation A thoroughly cleaned, dry, grease-free surface is essential for maximum performance. For repeatable behavior and results the material and the substrates should be in the range of 68-77°F (20-25°C) object temperature. Caution: Use adequate respiratory, eye and skin protection when using etch solutions. B. Film Application Care must be taken when handling AF 3074 FST at low temperatures because it can easily crack. Warm AF 3074 FST to ambient conditions in the sealed package to prevent moisture condensation o n the adhesive surface. 1. Cut portion of film to be used with protective liners in place 2. Remove liner from one side of the film. 3. Place film using the remaining liner as a protective cover. 4. Avoid air entrapments between film and the surface. On metal surfaces, for example, the film can be rolled into position with a rubber roller 5. Remove second protective liner 6. Assemble parts and cure

3M™ Scotch-Weld™ AF 3074 FST C. Suggested Cure Cycle Normally, AF 3074 FST will begin to cure when a temperature of about 230-239°F (110-115°C) is reached. A minimum cure temperature of 248°F (120°C) is suggested to effect a full cure in reasonable time, e.g. 60 minutes. NOTE: The curing cycle will have an influence on the expansion ratio. D. Storage This product has a shelf life of 6 months from date of manufacturing in the sealed protective bag. At least 5 out of these 6 months, the product must be stored at 0°F (-18°C) or below. Accordingly, the maximum shelf life at room temperature is 1 months in the sealed protective bag. Our data i ndicate, that no loss in mechanical properties is obtained after 20 days storage at room temperature outside the protective bag. The liners should be removed immediately before use only, in order to slow down moisture absorption. Additional Information 5714. If you are outside of the U.S., please contact your nearest 3M representative. *These products were manufacture under a 3M Quality Management System registered to the AS9100 standard Automotive & Aerospace Solutions Division 3M Center St. Paul, MN 55144-1000 Phone 1-800-328-1684 Web www.3M.com/aerospace AF 3074 FST Issue date: 3/2018 3M and Scotch-Weld are trademarks of 3M Company © 3M 2018. All rights reserved. Technical Information: The technical information, recommendations and other statements contained in this document are based upon tests or experience tha t 3M believes are reliable, but the accuracy or completeness of such information is not guaranteed. Product Use: Many factors beyond 3M’s control and uniquely within user’s knowledge and control can affect the use and performance of a 3M product in a particular application. Given the varie ty of factors that can affect the use and performance of a 3M product, user is solely responsi ble for evaluating the 3M product and determining whether it is fit for a particular purpose and suitable for user’s method of application. Warranty, Limited Remedy, and Disclaimer: Unless an additional warranty is specifically stated on the applicable 3 M product packaging or product literature, 3M warrants that each 3M product meets the applicable 3M product specification at the time 3M ships the p roduct. 3M MAKES NO OTHER WARRANTIES OR CONDITIONS, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OR CONDITION OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR ANY IMPLIED WARRANTY OR CONDITION ARISING OUT OF A COURSE OF DEALING, CUSTOM OR USAGE OF TRADE. If the 3M product does not conform to this warranty, then the sole and exclusive remedy is, at 3M’s option, replacement of the 3M product or refund of the purchase price. Limitation of Liability: Except where prohibited by law, 3M will not be liable for any loss or damage arising from the 3M product, whether direct, indirect, special, incidental or consequential, regardless of the legal theory asserted, including warranty, contract, negligence or strict liability.