[steebo]

"A Post-It’s easy unstickability is its biggest feature and its downfall.

When you yank a note from the bottom, it curls. That curling is just enough force to lift the note off the paper, the whiteboard, or whatever it’s stuck to."

What do the properties of the adhesive have to do with this? Nothing.

[davisoneee]

...the adhesive has everything to do with this. If the adhesive was stronger, the curling would not have enough force to lift it off the wall. Post-its only exist because of their weak adhesive...and it's because their adhesive is weak that curling is an issue for them.

edit: by which I mean...if the adhesive was stronger, the post-its could curl and still stick to the wall. Post-its' soft adhesive lets them easily peel from each other, but also lets the minor force of a curled post-it unstick it from the wall.

[samatman]

Post-it® was created by 3M, adhesive is what they do.

The properties of the adhesive are what separates one from a piece of paper.