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.
> > >