The VHB tapes are viscoelastic in nature. The foam absorbs energy and relaxes stress which provides these tapes with their unique properties.
Viscoelastic means the tape has both solid-like and liquid-like characteristics.
The foam absorbs and dissipates energy to increase the effective strength of the surface bond. Absorbing energy in the foam is what provides the high level of strength, as well as the excellent fatigue resistance and sound and vibration damping properties.
The foam relaxes stress through viscous flow, reducing the long term stress on the surface bond line. 3M™ VHB™ Tapes, because of their resilient stress relaxing nature, allow parts to move independently such as with thermal expansion/contraction, as compared with traditional fasteners that either fight or must compensate for the movement.
3M™ Smart Tool
Use by hand or in an air chisel to quickly separate such bonded assemblies as overlapped panels and stiffeners.
3M™ Stripe Off Wheel
Takes residue off faster and easier than solvents or adhesive cleaners. Resilient rounded edge follows contours and irregular surfaces and cleans without scratches or damage to acrylic enamel or urethane paint.
General Purpose products are ideal for many interior and exterior industrial applications. These tapes have softer cores and are especially suited for textured surfaces or where sealing is required.
* High surface energy plastics include acrylic , ABS, polycarbonate , PVC, polyester, Polyamide, Polyimide, Phenolic, Noryl.
** Low surface energy plastics include PVA, EVA, polystyrene, acetal and some paints. They may require priming with 3M Tape Primer 94. Very low surface energy plastics such as polypropylene, polyethylene and EPDM are difficult surfaces to stick to. Primer 94 may improve the performance on these surfaces.
In shear (e.g. holding a sign or panel to a wall) the suggested amount of tape to hold up 1 kg is about 55cm^2 or for:
Standard Tape Widths Tape Length
12.7 mm wide 430 mm
19.0 mm wide 290 mm
25.4 mm wide 215 mm
These amounts of tape include a significant factor of safety to allow for the different properties of the tapes in the VHB Tape range. These amounts can be reduced by up to 50% depending on the tape type if customer evaluation gives satisfactory results.
The desirable tape application temperature range is 20ºC - 40ºC. There are VHB Tapes with special properties that allow low temperature application.
The minimum suggested surface temperatures for tape application are:
16°C: 4936, 4941, 4945, 4991
10°C: 4611, 4618, 4622, 4624, 4905, 4910, 4915, 4918, 4930, 4950, 4959, 5925, 5952, 5962, 9473
0°C: 4951, 4957 (on high surface energy substrates only)