Why does glue stick?

[KatieandDad]

I remember the original advert where a car was superglued to a hook and suspended from a crane.

I wouldn't trust the stuff to stick anything.

 

[KatieandDad]

I stick To92 together for thermal coupling.
It achieves the very thin layer and excludes the air, both of which are requirements for low Thermal Resistance.

Yep, that works, as long as the two transistors don't try to leave home.

 

[fpitas]

It's very important to degrease items to be superglued. Try using a solvent like acetone on each mating surface.

 

[AndrewT]

I also wrap about 3 or 4 turns of 0.8mm diameter copper around as a heatsink. I tried 1mm diam but I found that too stiff to do gently and accurately.
More as a temperature equalising sink in that the outers of the To92 pair are now in contact with copper that is substantially at Ta all the way around the turns.

 

[AndrewT]

It's very important to degrease items to be superglued. Try using a solvent like acetone on each mating surface.

I bought a bottle of "pure acetone".
The ingredients include jojoba oil !

 

[fpitas]

I bought a bottle of "pure acetone".
The ingredients include jojoba oil !

The manufacturer's definition of "pure" must be interesting.

 

[AndrewT]

The retailer and bottler's definition has nothing to do with reality.

The manufacturer almost certainly knows what he makes.

I wonder if the specification said jojoba oil <0.001% or said jojoba oil 1% and the bottlers just did not understand the difference !

 

[godfrey]

Why does glue stick things together?

Because it's paid to? Don't **** it off by asking too many questions.

 

[Tubelab_com]

Has anyone actually found anything that superglue can stick, other than your fingers ?

I was working in a stereo store in 1971 when the stuff first came out. We tested it on several things. It sticks a shiny new Quarter to the glass counter top very well. It was still there when I quit almost 2 years later. It sticks the bosses butt to the toilet seat too!

One of the salesmen who was leaving the company found that it really ruins the bosses day if you squirt a drop into the keyhole in the bosses car. A short piece of solder has the same effect.

 

[tvrgeek]

Super glue needs moisture as a catalyst. That is why it is hard to use on things like metal, where it works so well on you finger. It can be terribly frustrating on a dry day on dry non-porous surfaces. Read the instructions.

I was wondering what the best glue would be to tie my input pairs and current mirrors together with was. Metal power filled epoxy was a thought, but a thinner coat of super glue may be better. Good tip.

 

[NorthStar]

They use glue in electronics (audio gear), what kind?

I know that wood epoxy glue is used inside speaker enclosures.
And what else; like for some crossover parts, and transistors glued to the heat sinks (white stuff), etc.?