Did you know?
Did you know glue does not stick on the bottle that holds it?
It’s one of the mysteries of life that has many students meet with surprise and confusion throughout history. That pasty substance we all call glue sticks things together, but doesn’t stick to the inside of the bottle. Why not? The answer has nothing to do with magic. It is all science.
The regular white glue most students know contains chemicals called polymers. These polymers are long strands that are either sticky or stretchy. Glue manufacturers have to find just the right combination of sticky and stretchy polymers to make the best glue.
The glue also contains water which acts as a solvent that keeps the glue liquid until you want it to stick.
When glue is pasted on paper, it definitely gets exposed to air. The water in it eventually evaporates causing the glue to dry and harden. All that’s left are the sticky polymers that hold things together. In technical terms, this is called mechanical adhesion.
The simple reason why glue does not stick on the bottle is because there is not enough air inside the glue bottle to cause the water to evaporate. The bottle serves to protect the glue from the air and keeps the substance sticky.
Be sure to find a wide range of quality glues from different brands at all TBC stores.