The 3M™ VHB™ Tapes get their effective strength by absorbing energy with the foam core and by allowing rather than fighting movement. They bond with high holding strength for both dynamic and static stress situations. They have the strength to bond traffic sign panels to the stiffeners, to bond building panels to the frame, and to bond panels, stiffeners and trim on trucks, trailers, signs and a variety a variety of other applications.
Traffic Sign:
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The 3M™ VHB™ Tapes have passed crash test requirements at both 20 and 60 miles per hour (32 and 98 kilometers per hour). After crash test at both speeds all stiffeners and batten strips attached with 3M™ VHB™ Tapes remained completely bonded.
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A sign bonded with 3M™ VHB™ Tapes and tested with static load to simulate wind shear was found acceptable according to the 1985 AASHTO Standards at wind speeds of at least 145 km/hr (90 miles per hour). Testing with a 240 kg load (simulating 260 km/hr or 160 mph wind shear) failed when the steel U-post deformed. The adhesive bond between the aluminum sign panel and the stiffeners remained intact.
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The static and dynamic load performance of acrylic foam tape in highway signs has been vividly seen in an experimental sign that the Louisiana Department of Transportation (DOT) built before 1992 with 3M VHB acrylic foam tape. In 1992, Hurricane Andrew generated winds of up to 250 km/hr. (155 mph) in the Baton Rouge area, destroying several signs that had been constructed using rivets and bolts, but not the test sign constructed with acrylic foam tape.
Both crash impact and static load tests performed by the Safety and Structural Systems Division of the Texas Transportation Institute at Texas A&M according to the National Cooperative Highway Research Program Report (NCHRP) 230 and the 1985 American Association of State Highway and Transportation Officials (AASHTO) Guide, Standard Specifications for Structural Supports for Highway Signs, Luminaries and Traffic Signals.
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Construction Panel:
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• passed wind load structural tests up to 120 lb/ft2 (5.7 kPa), which corresponds to a sustained wind speed of 220 mph (350 kph)
• passed wind load structural tests up to 60 lb/ft2 (2.9 kPa) performed at temperatures ranging from -20°F (-29°C) to 150°F (66°C)
• passed hurricane impact and pressure cycling tests with a building design pressure up to 60 lb/ft2 (2.9 kPa)
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Tests performed by Construction Research Laboratory (Miami, FL) according to ASTM E330 Standard Test Method for Structural Performance of Exterior Windows, Curtain Walls and Doors by Uniform Static Air Pressure Difference and ASTM E1996 "Standard specification for Performance of Exterior Windows, Curtain Walls, Doors and Storm Shutters Impacted by Windborne Debris in Hurricanes".
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Architectural metal panels assembled with 3M™ VHB™ Tapes demonstrated excellent performance in these demanding tests, which provides strong evidence for their consideration in construction applications. |
Back to Unique Characteristics of 3M™ VHB™ Tapes
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Unique Characteristics of
3M™ VHB™ Tapes |
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