AF3185 3M | Alldatasheet

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Introduction 3M™ Scotch-Weld™ Structural Adhesive AF 3185 film is a non-volatile, thermosetting epoxy laminating adhesive and glass cloth combination designed for the structural bonding and for the preparation of reinforced epoxy glass laminate. Scotch-Weld AF 3185 film is commonly used for bonding aircraft canopies and windscreens into frames. Scotch-Weld AF 3185 film has been extensively used for bonding printed circuit boards to backing plates in the electronics industry. Advantages • Cure temperatures as low as 200°F (93°C) may be used.

  • Easy to cut.
  • Very low flow (< 10%).
  • Repositionable.
  • Excellent for vacuum or low pressure curing.
  • Excellent for bonding glass. Technical Data Issue No. 1 Product Description Form: Style 108 glass cloth preimpregnated with toughened epoxy resin Color: Light Tan Weight: 0.050 ± .01 lb./ft.2 (245 ± 50 g/m2) Caliper: 8 mils Note The technical information and data included in this technical data sheet should be considered representative or typical only and should not be used for specification purposes.
  • 2 - Application Proper application is as important as proper design and laminating adhesive choice to obtain maximum laminate properties. Improper laminating techniques can result in partial or complete failure of an assembly. Laminate Preparation: Lamina te Lay-up: 1. Cut portion of film to be used with protective liner in place. 2. Place film on part. 3. Roll in place with rubber roller. Heating film slightly will increase its tackiness. 4. Remove protective liner. 5. Repeat procedure until the desired number of plies are obtained. Mechanical Performance 75°F 4600 psi 31.7 MPa Overlap Shear ASTM D 1002 Metal: FPL etched 2024-T3 bare aluminum Cure cycle: 200 ± 5°F - 12 to 15 psig - 6 hours - 9°F/minute rise rate Test load rate: 1200-1400 psi/minute (0.05 inches/minute) Test Temp Peel Rate Peel Strength 75°F 1"/min 41 in lb/in 75°F 3"/min 47 in lb/in Metal to Metal Climbing Drum Peel ASTM D 1781 Metal: FPL etched 2024-T3 clad aluminum Cure cycle: 235 ± 5°F - 35 psig - 90 minutes - 5°F/minute rise rate
  • 3 - Cure Cycle A. General Cure Requirements The cure requirements for Scotch-Weld AF 3185 film are a function of Scotch- Weld AF 3185 film properties. Specific application, equipment available, production limitations and bond properties required. General cure properties of Scotch-Weld AF 3185 film are as follows: 1. Cur e Pressure: Pressure is required during cure to form a high strength bond. Pressure may be applied by use of an autoclave, press, or vacuum bag. 2. Cur e Temper ature: The cure temperature may be varied from 200°F to 350°F (93°C to 177°C) depending upon the materials being used, equipment available and properties desired. Scotch-Weld AF 3185 film will soften as temperature is increased and cure will be initiated at 200°F (93°C) and a low strength gel formed. Continued heating chemically converts this gel into a high strength, solvent resistance bondline. 3. Cur e Time: Cure time depends upon the cure temperature used, methods heat application, production limitations and bond properties required. Since no two operations are exactly alike, it is recommend that a few simple experiments be conducted varying both temperature and cure time to determine optimum conditions for the particular application. B. Sug gested Cure Cycle The following cure cycle has been used to obtain high strength bonds in our laboratory. 1. Apply a positive pressure of 25 psi (0.17 MPa) and maintain throughout the cure cycle. 2. Raise the temperature from ambient to 250°F (121°C) at a 5°F/minute rise rate (2.8°C/minute rise). 3. Cure for 60 minutes at 250°F (121°C). 4. Cool to below 100°F (38°C) prior to release of positive pressure. Storage Scotch-Weld AF 3185 film must be stored at 0°F (-18°C) for lower. It should be permitted to warm thoroughly to room temperature before using to prevent moisture condensation. Shelf Life When stored at 0°F (-18°C) or below, the 3M Standard shelf life for Scotch-Weld AF 3185 film is 6 months from date of shipment from 3M.
  • 4 - To request additional product information or to arrange for sales assistance, call toll free (800) 235-2376. Our fax number is (417) 869-5219. Address correspondence to: 3M Aerospace Central, 3211 E. Chestnut Expressway, Springfield, MO 65802. For Additional Information 3M MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. User is responsible for determining whether the 3M product is fit for a particular purpose and suitable for user’s method of application. Please remember that many factors can affect the use and performance of a 3M Adhesives Division product in a particular application. The materials to be bonded with the product, the surface preparation of those materials, the product selected for use, the conditions in which the product is used, and the time and environmental conditions in which the product is expected to perform are among the many factors that can affect the use and performance of a 3M product. Given the variety of factors that can affect the use and performance of a 3M product, some of which are uniquely within the user’s knowledge and control, it is essential that the user evaluate the 3M product to determine whether it is fit for a particular purpose and suitable for the user’s method of application. Important Notice If the 3M product is proved to be defective, THE EXCLUSIVE REMEDY , AT 3M’S OPTION, SHALL BE TO REFUND THE PURCHASE PRICE OF OR TO REPAIR OR REPLACE THE DEFECTIVE 3M PRODUCT. 3M shall not otherwise be liable for loss or damages, whether direct, indirect, special, incidental, or consequential, regardless of the legal theory asserted, including, but not limited to, contract, negligence, warranty, or strict liability. Limitation of Remedies and Liability This Adhesives Division product was manufactured under a 3M quality system registered to ISO 9002 standards. ISO 9002 Refer to Product Label and Material Safety Data Sheet for health and safety information before using this product. For additional health and safety information, call 1-800-364- 3577 or (651) 737-6501. Precautionary Information Printed in U.S.A. ©3M IPC 2000 78-6900-9829-4 Recycled Paper 40% pre-consumer 10% post-consumer Adhesives Division 3M Center, Building 220-8E-05 St. Paul, MN 55144-1000 Phone: 1-800-364-3577 or 651/737-6501 www.3M.com/Adhesives