The Fabulous Engineering and Design of Duct Tape

Bill Hammack, aka The Engineer Guy, is an amazing engineering educator and in this video he explains how duct tape is designed to simultaneously do three things well: “a) adhere with light pressure, b) stay in place, yet c) be removable”.

Controlling the stickiness of tape is of utmost importance. In fact, a key element of engineering tape is controlling its stickiness — and only by doing that can tape be wound into a useful roll. If the tape sticks too tightly to itself, we could not use it.

Gotta be honest: I was not expecting Silly Putty to make a relevant guest appearance during his explanation. And I love the ramp & ball test for tape stickiness near the end…a very elegant and simple bit of engineering:

Pressure sensitive tape predates much of the most elementary molecular understanding of adhesion; tape has been mass produced since the early twentieth century. That engineers developed and refined tape without this knowledge is no surprise — recall that the purpose of the engineering method is to solve problems before we have full scientific knowledge.

• Bill Hammack
• design
• engineering
• science
• video