2007-03-21 12:34:58 · 9 answers · asked by ? 2 in Games & Recreation ➔ Hobbies & Crafts
Your question wasn't why doesn't the glue dry out if left open... it was "Why doesn't crazy glue stick to the inside of its tube." On "How It Works" a TV show, they show the very thin aluminium rolled out and it's lubricated before being made into the tube shape, thus, glue does not stick to the sides.
Same method for toothpaste and ointments. Who know???!
2007-03-21 15:43:16 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Because while it is wet it is not bonded and by keeping the cap on, you keep the air out and prevent it from drying and bonding. If you were the leave the cap off of a tube of super glue, it would dry and stick to the inside of the tube,
2007-03-21 12:43:05 · answer #2 · answered by IamCarissa 2 · 0⤊ 0⤋
"Generally, cyanoacrylate is an acrylic resin which rapidly polymerises in the presence of water (specifically hydroxide ions), forming long, strong chains, joining the bonded surfaces together. Because the presence of moisture causes the glue to set, exposure to moisture in the air can cause a tube or bottle of glue to become unusable over time. To prevent an opened container of glue from setting before use, it must be stored in an airtight jar or bottle with a package of silica gel."
2007-03-21 12:39:09 · answer #3 · answered by Matthew L 4 · 1⤊ 0⤋
Hi:
The reason is that the tube insides is coated with a thin film of teflon which the stuff can't stick too, due to the fact that teflon is chemically inert ( or can't bond to anything chemically) if you can read it on the instruction for crazy glue: do not use it to bond teflon or other florialcarbon compounds.
That is why you can't glue those compounds. Teflon or any other teflon-like compounds on any cookware is mechanically bonded on ,not chemically.
Hope this helps.
2007-03-21 14:38:04 · answer #4 · answered by Anonymous · 0⤊ 1⤋
I have always wondered that.
I assume it has something to do with it's reaction to oxygen that make it stick, since the tube is mostly air tight.
2007-03-21 12:39:19 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Because it is wet while it's in the tube. When it dries out it sticks.
2007-03-21 12:40:39 · answer #6 · answered by I know, I know!!!! 6 · 0⤊ 0⤋
It's not exposed to air which activates and hardens the glue.
2007-03-21 12:38:38 · answer #7 · answered by Memo Erdes 3 · 1⤊ 0⤋
cause it has to have air to dry leave the lid off put it back on and it will stick
2007-03-21 12:38:36 · answer #8 · answered by cool chick 2 · 0⤊ 0⤋
because there's no air to air dry it in order for it to stick.
2007-03-21 12:38:09 · answer #9 · answered by curious_One 5 · 0⤊ 0⤋