Elvamide experience or tips?

[bentl]

Hi,

does anyone have any tips regarding using Elvamide as coating? I have the recipe for cooking the stuff, but are there any tips regarding applying it?

Regards
Bent

[chinsettawong]

Why not try something easier?

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[alexberg]

Originally Posted by bentl

Hi,

does anyone have any tips regarding using Elvamide as coating? I have the recipe for cooking the stuff, but are there any tips regarding applying it?

Regards
Bent

http://www.audiocircuit.com/A-PDF/AA...N1-841-THV.pdf
Sincerely
BAA

[SM7UYJ]

I have done some tests with a sponge etc but I have not got the results I wanted!

Perhaps a air brush if the Nylon does not clog up the nozzle!?

Are you using pure Elvamide or have you doped it ?

/R

[alexberg]

Originally Posted by SM7UYJ

I have done some tests with a sponge etc but I have not got the results I wanted!

Perhaps a air brush if the Nylon does not clog up the nozzle!?

Are you using pure Elvamide or have you doped it ?

/R

My experience says that alcohol based Nylon can be easily removed by the paper towel. It would be fair to note that I have not burnt it in with heat gun as usually recommended. Result is haisy looking coating...
Alex

[bentl]

Originally Posted by SM7UYJ

I have done some tests with a sponge etc but I have not got the results I wanted!

Perhaps a air brush if the Nylon does not clog up the nozzle!?

Are you using pure Elvamide or have you doped it ?

/R

Can you be more spesific? What unwanted results did you get? was it a functional problem or more of a estetich problem?

Regards
Bent

[SM7UYJ]

Actualy I did not get as far as to test the coating in my test stators.
The Elvamide did not stick to the Mylar in a way I was hoping for - you could "roll it off" with your fingers! (did not heat treat the Mylar!)
Also I did not manage to get a uniform coating either, so I put the Nylon aside and used a premade coating(MT-Audio).
I have over 1kg off Elvamide in my lab, so I'll certanly give it another try someday!

/R

[harry_at]

Originally Posted by bentl

does anyone have any tips regarding using Elvamide as coating? I have the recipe for cooking the stuff, but are there any tips regarding applying it?

Hi,

here a advice from Steve (One Thing Audio):

"If the diaphragm is first washed in soapy water and then allowed to dry (before applying the Elvamide – an old Quad trick) it might work reasonably well."

Harry

[alexberg]

Originally Posted by harry_at

Hi,

here a advice from Steve (One Thing Audio):

"If the diaphragm is first washed in soapy water and then allowed to dry (before applying the Elvamide – an old Quad trick) it might work reasonably well."

Harry

It has been noted multiple times that mylar has to be thoroughly degreased - acetone - isopropyl alcohol. Surface has to be activated threafter - corona discharge or chemicals (washing soda is the safest).
Even Nylon in alcohol/phenol will not adhere if not heat treated after application - Nylon's melting point is lower than the mylar's one.
Alex

[harry_at]

Originally Posted by alexberg

It has been noted multiple times that mylar has to be thoroughly degreased - acetone - isopropyl alcohol.

That is not what I meant.

"Washing" the mylar with soapy water is not a cleaning recipe.

Of course, degreasing with some acetone is always a must.

Harry