Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Thank you.

Ballendo

--- In Homebrew_PCBs@yahoogroups.com, "gk_impala" <yahoo@i...> wrote:
> Hello Ballendo,
>
> Specified tank materials for the bungard system are:
> Cleaner DS270 : Stainless steel or PPE
> Predip DS400 : PVC or PPE
> Activator DS500 : PVC or PPE
> Intensifier DS650 : PVC or PPE
> Plating bath CU400 : Not found, but Polypropylene anode bags are OK
>
> For this reason I decided to weld the tanks from Polypropylene (PPE)
> To do this I made a special tip for my temperature controlled
> soldering station. It cuts through the joint and seals the two
sheets
> of material together on the full depth of the sheet (3mm) Should
> probably also work for PVC and other thermoplasts.
> However it takes some time to get the right speed, pressure etc.
> Sometimes it works better then others, but I found it with my
> materials much more reliable than welding using a heat gun.
> I uploaded some pictures of this tip to:
>
http://photos.groups.yahoo.com/group/homebrew_pcbs/lst?.dir=/impala&.s
> rc=gr&.order=&.view=t&.done=http%3a//briefcase.yahoo.com/
>
> Sorry they are a bit unsharp, but I had to use some additional
lenses
> to get the close-up pictures, and not enough hands to hold it all
> steady.
>
>
> Also I found some information on the chemicals themselves. I first
> ordered the Bungard chemicals for a starting point, but want to
test
> the chemical compositions found as well. Those chemicals seem to
work
> like the Bungard chemicals, so I can try one tank at a time to test
> if they are useable.
>
> These make them yourself chemicals are based on United States
Patent
> 5,071,517 link:
> http://patft.uspto.gov/netacgi/nph-Parser?
>
Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=/netahtml/srchnum.htm&r=1&f=G&l=5
> 0&s1=5,071,517.WKU.&OS=PN/5,071,517&RS=PN/5,071,517
>
> And, searching for the link, I also found the next two links, which
> might be of interrest. (I didn't read them yet)
>
> http://patft.uspto.gov/netacgi/nph-Parser?
>
Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=/netahtml/srchnum.htm&r=1&f=G&l=5
> 0&s1=4,933,010.WKU.&OS=PN/4,933,010&RS=PN/4,933,010
>
> http://nr.stic.gov.tw/ejournal/ProceedingA/v23n3/365-368.pdf
>
> Apart from these links, I also found some more information, which I
> can dig up if anyone wants to start trying.
>
>
> Regards,
>
> Gertjan
>
>
>
>
> --- In Homebrew_PCBs@yahoogroups.com, "ballendo" <ballendo@y...>
> wrote:
> > Adam, Markus Z,
> >
> > Will pvc (cemented) stand up to the chemicals of your THP system?
> > What about glued acrylic?
> >
> > Next, Has anyone found a good US supplier of the "commercial" THP
> > chemicals, like the Bungard chemistry Markus uses? Is Bungard
sold
> in
> > the USA?
> >
> > I don't want to mess with the black hole techniques, or vacuuming
> > away the expensive hole wall activator...
> >
> > Thank you in advance,
> >
> > Ballendo
> >
> >
> >
> > --- In Homebrew_PCBs@yahoogroups.com, Adam Seychell
> > <adam_seychell@y...> wrote:
> > You are correct saying that if something can
> > > be glued then its should be glued and not welded because its
> > > simpler. PVC pipe fittings is an example of glued plastic.
> > > Sometimes a the flat face of a PVC block or sheet can be glued
to
> > > another.
> > >