Give Now

A Moment of Science

What Makes Tape Sticky?

Ever wonder about the physics behind your everyday office supplies?


Here’s a simple question: what makes tape sticky?

Being able to produce tape that works isn’t the same as understanding the basic physics involved, but two physicists from France, named Gay and Liebler, think they’ve come up with an answer.


It turns out, that if you view the surface of a piece of tape with a powerful microscope, it isn’t flat at all. In fact, it has peaks and valleys invisible to the naked eye.

When the tape’s surface is pressed down, pockets of air are trapped between the tape and whatever it’s touching. Those air pockets work like a million tiny suction cups.

To pull the surface away again you’d have to stretch those air pockets. Because they are sealed off and no air can get in, the air pressure inside each bubble will decrease as its size increases. That means the greater air pressure in the room is trying to push that tape back down, and keeping it stuck. With enough force, though, you can cause a break that allows air to rush in under the tape, and that’s when the tape tears away!

Stay Connected

What is RSS? RSS makes it possible to subscribe to a website's updates instead of visiting it by delivering new posts to your RSS reader automatically. Choose to receive some or all of the updates from A Moment of Science:

Support for Indiana Public Media Comes From

About A Moment of Science

Search A Moment of Science