Velcro: Learning from Nature

In 1941, a Swiss engineer named George de Mestral went for a hike with his dog. They came home covered in Cockleburrs. Most people would just pick them off and swear. George grabbed a microscope. He saw that the burrs had tiny Hooks, and his pants had tiny Loops. He invented Velcro (Velours + Crochet).

Hook and Loop Physics

It is a temporary mechanical bond.

• Hooks: Stiff nylon hooks.
• Loops: Fuzzy nylon mess.
• Engagement: When pressed, hundreds of hooks snare the loops.
• Release: When peeled, the hooks bend straight to release, then snap back to shape.

Robotics: The Battery Holder

In FTC, we use Velcro (specifically 3M Dual Lock) to mount batteries and hubs. Batteries are heavy. We need to swap them in 10 seconds. Screws are too slow. Tape is messy. Velcro allows a Structural Bond that is also Quick Release.

• Dual Lock: Instead of Hook/Loop, it uses Mushroom-shaped heads on both sides. When they snap together, it holds with the strength of a screw but pops off with a prybar. It is the only reason our electronics don’t fly out of the robot every time we hit a wall.