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Re: 4 layer diy

2003-11-26 by Steve

> >The reason I've come in is that my experience is (from just ordinary
> >gluing jobs) that the 5min stuff isn't anywhere near as good as the
> >"normal" [OK "regular" for you guys across the pond :-)] Epoxy. I know
> >this means clamping up for maybe 24 hrs but I think you will find
the bond
> >a lot stronger.

Markus said:
> Well, I cannot stress enough that the results I'm getting are more
> than satisfying. The resulting PCB's are with regard to their
> useability in everyday situations absolutely ok. 

Epoxy has definitely improved. I gained a strong distrust of 5 minute
epoxies from the 70's and 80's (dating myself) as they'd always end up
exuding a greasy residue and letting go, getting sort of crumbly.

Now, though, I've had great success with 5 and 15 minute epoxies. Some
epoxies that I use, like Devcon's Plastic Epoxy, only come in 5 minute
varieties and are -very- strong. It appears to have a plastic solvent
in it, so that in addition to just epoxy glue action, it also welds
itself to the plastic.

I glued a polystyrene squirt gun handle onto an ABS tube for a prop
blaster about 15 years ago with the stuff and it is strong as if it
were cast in one piece. I got to show it to a pro propmaker from
Hollywood after he said that you cannot glue anything to ABS reliably
except ABS and only with ABS cement.

Steve

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