Removing dustcap from a Polypropylene driver

[AJinFLA]

I read an earlier post about driver mods "Repairing and modifying speakers" where it was suggested that acetone/heat could be used to loosen the glue used on dustcaps. But I believe most of the references were to paper cone drivers. What about a Polyprop driver. I would imagine that too much heat would certainly be detrimental, perhaps a (hair) blowdryer max'd out - at most. Any suggestions as to whether acetone would be safe - or not? Thanx.

AJ

[DoomPixie]

...or not

tested it out on a dead sud that had a polypropylene cone and the cone is discoloured where the acetone was in contact with it, not sure what other damage it does but the discolouration is a sure sine in my books that its a bad idea. mabey someone else knows diffrent though?

Owen

[Scottmoose]

I forsee a melting situation here, both with the heat and the chemicals. If you must, try a sharp knife, possibly lighly heated. Or just leave as is and accept the quack.

[hunter audio]

hi

PP adhesives are most difficult to work off - as pp is difficult to glue in the first place

check if the dustcap has been fitted with a rubber toughened adhesive or epoxy

for epoxy benzoyl acetate will be the best - you will have to apply it atleat 3 to 4 times with a couple of hours gap and wait over night for the benzene to have effect

for rubber toughened you can try the above or dexterly work it off with a slightly heated sharp object like a knife - need to mention you need to be ultra careful not to destroy the cone itself

best would be if u could practise once on another - burn out or very cheap - car audio unit or some thing similar

also keep applying pressure on the cone pressing it down from near the dustcap after you feel the dustcap is a little loose - most probably it will pop out prising its own self free with the uneven force against the glued surface from the cones face

Suranjan

[AJinFLA]

Thanx for all the advice. Suranjan, it definately sounds like worked w/ many a driver before . I'll proceed carefully. Holiday weekend coming up. Should be fun .

Cheers,

AJ