DESCRIPTION FM 400NA adhesive film is the non-asbestos version of FM 400 and is designed to provide similar performance to that of FM 400 adhesive across the board. It is supplied with a lightweight nylon carrier and is designed for bonding metal-to-metal and sandwich composite structures requiring long time exposures to 420 F (216 C). BR 400 is a modified epoxy corrosion inhibiting primer and provides excellent corrosive resistance when used on aluminum structures. FM 400NA adhesive film will also bond to BR 127 primer with normal results. Where corrosion resistance is not required, FM 400NA adhesive film can be used without primer. FM 400NA adhesive film can be cured over a wide range of heat-up rates, temperatures and pressures. The recommended cure cycle is a 3 to 8.5 F/min (1.6 to 4.7 C/min) heat-up rate with a 60 minute hold at 350 ± 10 F (177 ± 5.6 C) and 45 ± 10 psi (0.31 ± 0.07 MPa) pressure. FEATURES & BENEFITS Designed to bond metal-to-metal and honeycomb sandwich structures Long term thermal resistance at 420 F (216 C) Structural performance from -67 to 420 F (-55 to 216 C) Does not contain asbestos Can be cured with a wide range of heat-up rates SUGGESTED APPLICATIONS Honeycomb sandwich construction Metal-to-metal bonding AEAD- 0 0 0 3 6
CHARACTERISTICS Table 1 Product Description: FM 400NA adhesive film Form Color Moderately tacky film on a nylon carrier Grey Volatiles Less than 2% Weight 0.100 ± 0.005 psf (0.50 ± 0.025 kg/m 2 ) 0.075 ± 0.005 psf (0.37 ± 0.025 kg/m 2 ) Nominal Thickness Shelf Life Shop Life Recommended Storage 0.012 in (0.30 mm) 0.008 in (0.20 mm) 6 months from date of shipment at recommended storage 90 days at or below 75 F (24 C) Store at or below 40 F (4 C) Table 2 Product Description: BR 400 primer Color Red Solids 20 ± 1% Viscosity Thinner Shelf Life Shop Life 5 cps nominal when run at 75 F (24 C) with a No. 1 spindle at 20 rpm Methlyethylketone (MEK) 6 months from date of shipment at recommended storage 6 months at or below 85 F (29 C) 2
PROPERTIES Table 3 Typical Physical Properties: FM 400NA film with BR 400 primer, 2024-T81 bare aluminum substrates Property Test Condition Average Result 0.10 psf (0.50 kg/m 2 ) 10 min at -67 ± 5 F (-55 ± 3 C) 3740 (25.81) 10 min at 75 ± 5 F (24 ± 3 C) 3400 (23.46) 10 min at 365 ± 5 F (185 ± 3 C) 2260 (19.22) Tensile Shear, psi (MPa) 10 min at 420 ± 5 F (216 ± 3 C) 1850 (12.76) - Tested at 75 ± 5 F (24 ± 3 C) 3620 (28.81) - Tested at 365 ± 5 F (185 ± 3 C) 2700 (20.29) - Tested at 420 F (216 C) 2000 (13.80) Creep Rupture, 1600 psi (11.04 MPa) at 75 F (24 C) for 192 hours 0.0 in (0.0 mm) max 800 psi (5.52 MPa) at 420 F (216 C) for 192 hours 0.0 in (0.0 mm) max Tensile Shear, psi (MPa) After environmental conditioning Tested at 75 F (24 C) 7 days immersion at 120 F (50 C) in hydrocarbon fluid (TT-S-735, Type I) 3790 (26.36) 7 days immersion at 120 F (49 C) in MIL-T-5624 3360 (23.18) 7 days immersion at 75 F (24 C) in hydraulic fluid (MIL-H-5606) 3365 (27.43) 7 days immersion at 75 F (24 C) in MIL-A-8243 3300 (27.25) Bell Metal-to-Metal Peel, lb/in (kn/m) 10 min. at -67 ± 5 F (-55 ± 3 C) 11 At 75 ± 5 F (24 ± 3 C) 6 Notes: Primer: Thickness 0.0001 to 0.0003 in (0.0025 to 0.0051 mm), oven dry 30 minutes at 190 F (88 C) Adhesive cure cycle: 2.5 F/min (1.4 C/min) to 350 F (177 C), 60 minutes at 350 F (177 C) with 50 psi (0.31 MPa) pressure Table 4 Typical Physical Properties: FM 400NA film with BR 400 primer, 0.050 in. (1.27 mm) Ti6-4V annealed titanium substrates Property Test Condition Average Result 0.10 psf (0.50 kg/m 2 ) 10 min at -67 ± 5 F (-55 ± 3 C) 4290 (29.60) 10 min at 75 ± 5 F (24 ± 3 C) 3830 (20.91) Tensile Shear, psi (MPa) - Tested at 75 ± 5 F (24 ± 3 C) - Tested at 365 ± 5 F (185 ± 3 C) 4220 (29.12) 3260 (22.50) - Tested at 420 F (216 C) 2630 (18.15) 3
Table 5 Typical Sandwich Properties: FM 400 film, 0.10 psf (0.50 kg/m 2 ) with BR 400 primer, bonded honeycomb panels Property Test Condition Average Result 75 ± 5 F (24 ± 3 C) 1000 (6.90) Flatwise Tension, psi (MPa) 1 - Tested at 365 ± 5 F (185 ± 3 C) 730 (5.03) - Tested at 420 F (216 C) 475 (3.28) 75 ± 5 F (24 ± 3 C) 960 (6.62) Flexural Strength, psi (MPa) 2 - Tested at 365 ± 5 F (185 ± 3 C) 920 (6.34) 1 Core: 3/16 in. cell, 5.7 pcf, 0.625 in. thick 5056 non-perforated aluminum - Tested at 420 F (216 C) 610 (4.21) 2 Skins: 0.063 inch 2024-T3 bare aluminum Core: 1/8 in cell, 8.1 pcf, 0.625 in thick 5056 non-perforated aluminum Skins: 0.063 inch 2024-T3 bare aluminum APPLICATION NOTES Preparation of Aluminum A clean, dry, grease-free surface is required for optimum performance. A recommended procedure for cleaning aluminum skins prior to priming or bonding is the FPL cleaning method: 1. Vapor degrease, alkaline clean, rinse and check for water break 2. Prepare a sodium dichromate/sulfuric acid solution as follows: a. Mix the following ingredients: Sodium Dichromate 34 grams FED-O-S-595A Water 700 ml Deionized water recommended Sulfuric Acid 304 grams FED-O-A-115, Class A, Grade 2 b. Add additional water to make one liter This solution will dissolve 1.5 grams of 2024 clad aluminum per liter. NOTE: Chromic acid is highly corrosive. All contact with skin and tissues must be prevented. Wear impervious apron, boots and gloves as well as splash-proof goggles and face shield when preparing and/or using chromic acid. If airborne concentration of chromic acid exceeds the 8-hr TWA established by OSHA, respirators approved by NIOSH must be worn. Chromic acid solutions should be prepared and handled only in fume hoods or other adequately ventilated areas even when the TWA is not exceeded. Traces of chromyl chloride may occur in the vapors above heated chromic acid solutions prepared from chlorinated water. 3. Immerse aluminum part in sodium dichromate/sulfuric acid solution at 155 ± 5 F (68 ± 3 C) for 10 minutes (clad aluminum) or 5 minutes (bare aluminum) 4. Spray rinse with water at or below 75 F (24 C) 5. Immerse in cold water 6. Repeat spray rinse checking for water break 7. Dry in a vented oven below 150 F (65 C) NOTE: Deionozed water is recommended. 4
Primer Application Spray or brush coat to a dry primer thickness of 0.0001 to 0.0003 inch (0.0025 to 0.0076 mm). Spray technique consists of applying a smooth, even coat of primer. Good results have been obtained using a Devilbill Spray Gun with Fluid Needle MBC-44F, Fluid Tip AV-15F and Air Cap No. 36. Air line pressure of 40 psi (0.28 MPa) is satisfactory. Since BR 400 primer settles rapidly, it requires thorough mixing prior to and constant agitation during application. Air dry 30 minutes at 190 F (88 C) then cocure with FM 400NA adhesive. Bonding Procedure Metals must be properly prepared before application of the adhesive. Before bonding, detail parts and adhesive film must be properly assembled. Patters of FM 400NA adhesive film should be cut as required before removal of the protective covering which is easily stripped from the film at ambient conditions. Adhesive should then be applied smoothly to details. After assembly of the details, apply pressure and cure using the following recommended cure cycle: 1. Heat up at 2.5 F/min (1.4 C/min) to 350 F (175 C) 2. Hold at 350 F (175 C) for 65 minutes with 50 psi (0.34 MPa) pressure PRODUCT HANDLING AND SAFETY Cytec Engineered Materials recommends wearing clean, impervious gloves when working with epoxy resin systems to reduce skin contact and to avoid contamination of the product. Materials Safety Data Sheets (MSDS) and product labels are available upon request and can be obtained from any Cytec Engineered Materials Office. DISPOSAL OF SCRAP MATERIAL Disposal of scrap material should be in accordance with local, state, and federal regulations. 5
CONTACT INFORMATION GLOBAL HEADQUARTERS Tempe, Arizona tel 480.730.2000 fax 480.730.2088 NORTH AMERICA Olean, New York tel 716.372.9650 fax 716.372.1594 Winona, Minnesota tel 507.454.3611 fax 507.452.8195 Greenville, Texas tel 903.457.8500 fax 903.457.8598 EUROPE AND ASIA Wrexham, United Kingdom tel +44.1978.665200 fax +44.1978.665222 Springfield, Massachusetts tel 1.800.253.4078 fax 716.372.1594 Anaheim, California tel 714.630.9400 fax 714.666.4345 Cytec Carbon Fibers LLC Piedmont, South Carolina tel 864.277.5720 fax 864.299.9373 Östringen, Germany tel +49.7253.934111 fax +49.7253.934102 Havre de Grace, Maryland tel 410.939.1910 fax 410.939.8100 Orange, California tel 714.639.2050 fax 714.532.4096 D Aircraft Products, Inc. Anaheim, California tel 714.632.8444 fax 714.632.7164 Shanghai, China tel +86.21.5746.8018 fax +86.21.5746.8038 DISCLAIMER: The data and information provided in this document have been obtained from carefully controlled samples and are considered to be representative of the product described. Cytec Engineered Materials (CEM) does not express or imply any guarantee or warranty of any kind including, but not limited to, the accuracy, the completeness or the relevance of the data and information set out herein. Because the properties of this product can be significantly affected by the fabrication and testing techniques employed, and since CEM does not control the conditions under which its products are tested and used, CEM cannot guarantee that the properties provided will be obtained with other processes and equipment. No guarantee or warranty is provided that the product is adapted for a specific use or purpose and CEM declines any liability with respect to the use made by any third party of the data and information contained herein. CEM has the right to change any data or information when deemed appropriate. All trademarks are the property of their respective owners. 6