2007-01-24 16:35:19 · 19 answers · asked by Smo 4 in Science & Mathematics ➔ Chemistry
It's because the cap on top is made to keep the air out. When air gets to the glue - the water in the glue evaporates causing it to dry and harden. Still, some air does get to the glue inside the bottle. If you use a bottle of glue that has been sitting around for a long time and use it up - if you cut it open you will find a layer of glue stuck to the inside of the bottle.
2007-01-24 16:40:02 · answer #1 · answered by ? 6 · 2⤊ 0⤋
because there isn't enough air inside the bottle to dry the whole mass of glue
2007-01-25 05:45:49 · answer #2 · answered by Cookie Monster 3 · 1⤊ 0⤋
The interior of the bottle is so smooth, the polymers of the glue have no place to sink their line in to and hold on.
2007-01-25 00:45:50 · answer #3 · answered by eric l 6 · 1⤊ 0⤋
I'm assuming you are talking about plain old white glue, if thats the case, I think the answer is lack of air. Oxygen hardens it into a usable adhesive.
2007-01-25 00:39:47 · answer #4 · answered by Jason W 3 · 1⤊ 0⤋
There is no catalyst present or vapors can't excape. Super glue is activated by moisture, white glue simply dries... basically it doesn't stick because it's engineered to not stick!
2007-01-25 00:38:59 · answer #5 · answered by caffine_loady 3 · 2⤊ 0⤋
Not enough air to react with the glue and become solid.
2007-01-25 00:37:40 · answer #6 · answered by JackOfAllTrades 2 · 1⤊ 0⤋
the glue in the bottle is still moist, and it doesn't stick to wax
2007-01-25 00:38:47 · answer #7 · answered by Anonymous · 1⤊ 0⤋
because it is activated by the air..in the bottle its not really glue its just stuff......but once in contact with the air it starts to bond with things......
2007-01-25 00:38:25 · answer #8 · answered by Krystina 3 · 2⤊ 0⤋
some glue is made from water bases or solvents they need to evaporate to harden the glue
2007-01-25 01:13:41 · answer #9 · answered by fraz.s.u.s.s 2 · 2⤊ 0⤋
b/c the air has to hit the glue in order for it to become sticky
2007-01-25 00:39:17 · answer #10 · answered by kristina43 5 · 1⤊ 0⤋