DP920 3M, DP920 Datasheet - Page 5

• Manufacturer Part Number: DP920
• Description: Scotch-Weld Epoxy Adhesive
• Manufacturer: 3M
• Series: Scotch-Weld 920r

Specifications of DP920

• Adhesive Type: Epoxy - 2 Part
• Adhesive Applications: Bonding - General Purpose
• Color: Off-White
• Dispensing Method: Dual Cartridge
• Volume: 37ml

3M
Epoxy Adhesive
DP920
Substrates and Testing
™
Scotch-Weld
A. Bell Peel (ASTM D3167)
B. Cure Cycle
™
Overlap Shear (ASTM D1002)
Overlap Shear (ASTM D-1002, 3M Test Method C-236) strength was
measured on 1" wide x 1/2" overlap specimen. These bonds were made
individually using 1" x 4" pieces of substrates except for Aluminum. Two
panels 0.063 in. thick, 4 in. x 7y in of 2024T-3 clad aluminum were bonded
and cut into 1 in. wide samples after 24 hours. The thickness of the adhesive
bond line was approximately 0.005". All strengths were measured at 73°F
(23°C) except when noted.
The separation rate of the testing jaws was 0.1 in. per minute for metals, 2 in.
per minute for plastics and 20 in. per minute for rubbers. The thickness of the
substrates were: steel, 0.060 in.; other metals, 0.05-0.064 in.; rubbers, 0.125in.;
plastics, 0.125 in. and samples were allowed to cure at 75°F (24°C) and
approximately 50% RH for 1 week before tested. The separation rate of the
testing jaws was 0.1 inch per minute for metals and 2 inches per minute for
plastics.
Bell peel strengths were measured on 1/2 in. wide bonds at the temperatures
noted. The testing jaw separation rate was 6 in. per minute. The bonds were
made with 0.064 in. bonded to 0.025 in. thick adherends.
With the exception of Rate of Strength Build-Up Tests, all bonds were cured
7 days at 73°F (23°C) at 50% RH before testing or subjected to further
conditioning or environmental aging.
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