3M™ Foam Tapes are often used to bond rough or irregular surfaces. The foam helps to absorb shock and distributes stress over the entire bonded surface. Foams are generally used over other types of bonding solutions to help fill gaps and provide damping.
Foam carriers are typically made up of:
Urethane foam has good temperature resistance, can act as a thermal insulator and can be easily die cut. It is open cell foam so it lacks solvent or moisture resistance and will yellow over time so it wouldn't be recommended for an outdoor environment. Application ideas include interior door, window and cabinet seals. The tapes can also be used to help cushion, damp sound and absorb vibration in keyboards, printers, dash boards etc.
Polyethylene foam is closed cell so it works well in sealing applications. The foam has lower temperature resistance and lower dynamic performance than urethane but it is more economical as a result.
Vinyl foam tapes are flexible closed cell foams. They are often chosen when it's necessary to seal out dust, light and moisture. Not only do they age well, they will remain flexible when exposed to elevated temperatures and UV light. Vinyl foam tapes are often used as a seal in appliances, computers, copiers and other electronic and transportation equipment.
Acrylic foam tapes are often used in the automotive industry to attach exterior trim. The foam provides high adhesion and stress relaxation properties and is extremely resistant to challenging environmental conditions. They offer superior long-term performance.
Check out the 3M™ Converter Markets Selection Guide for more product details.