I mean on a molecular level, what about the surface of tape makes it adhesive?
In: Chemistry
Ok since the existing posts are a little over 5yo level here’s my attempt.
Most surfaces (even extremely smooth ones) are actually very complex / textured at a microscopic level.
Tape uses pressure adhesives that are normally solid, but temporarily become a very thick liquid when pressure is applied.
So when you press tape against a surface the adhesive becomes this thick liquid goo, which is able to make its way into the nooks and crannies of the surface. When the pressure is removed, it becomes solid again and it’s physically locked into place.
The fascinating thing here is that you would think it’s a chemical / molecular bond but in reality it’s physical.
That’s also why you can use tape over and over again. There’s no chemical reaction that is ‘spent’ when it’s adhered. The only thing limiting its stickiness over time is when the surface gets dirty.
Latest Answers