The other issue with having any contaminant on a component added to a pcb,
temporary or permanent, is transference. Operators can handle the boots and
possibly transfer the oil?
It may only be a second or third order phenomena but it is hard enough
nowadays with no clean or cleaning processes trying to keep boards
uncontaminated without trying to control a known de wetting problem.
Best Regards
Dr Lee Hitchens
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On 16 Apr 2015 01:45, "Richard Kraszewski" <[log in to unmask]>
wrote:
> Perhaps more of a high-boiling plasticizer. Even if not at BP, the
> higher temp will help volatize it quicker, especially if a thin layer.
>
> Rich Kraszewski
>
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Douglas Pauls
> Sent: Wednesday, April 15, 2015 9:59 AM
> To: [log in to unmask]
> Subject: Re: [TN] Do Rubber conformal coat Masking Boots have some sort of
> mold release compound on them?
>
> Hmmmm, but if the problem was a Teflon or silicone mold release agent,
> that should not have worked. Could it be that the boots had more of an oil
> issue, as Lee suggested?
>
>
> Doug Pauls
> Principal Materials and Process Engineer Rockwell Collins
>
> On Wed, Apr 15, 2015 at 9:55 AM, Steve Gregory <[log in to unmask]> wrote:
>
> > Hi Graham!
> >
> > Baked the boots last night and they worked like a charm! Thanks again
> > buddy!
> >
> > Steve
> >
> > On Tue, Apr 14, 2015 at 10:34 AM, Graham Naisbitt <
> > [log in to unmask]> wrote:
> >
> > > Hi Steve
> > >
> > > I used to make these. Bake them overnight >12 hours at 80C. That
> > > should
> > do
> > > the trick. Let me know if it doesn’t.
> > >
> > > I assume these will be a silicone “rubber”. Who is your supplier -
> > > Kinarney Rubber in New England? If not, give them a call.
> > >
> > > Graham Naisbitt
> > >
> > > > On 14 Apr 2015, at 17:25, Steve Gregory <[log in to unmask]> wrote:
> > > >
> > > > Thanks Doug! So is there anything you can do, like wash them in
> > > > alcohol
> > > or
> > > > something?
> > > >
> > > > Steve
> > > >
> > > > On Tue, Apr 14, 2015 at 10:23 AM, Douglas Pauls <
> > > > [log in to unmask]> wrote:
> > > >
> > > >> Steve,
> > > >> In my experience they do. We sometimes see the same thing,
> > > >> whether
> > > molded
> > > >> rubber or molded vinyl.
> > > >>
> > > >>
> > > >> Doug Pauls
> > > >> Principal Materials and Process Engineer Rockwell Collins
> > > >>
> > > >> On Tue, Apr 14, 2015 at 11:21 AM, Steve Gregory
> > > >> <[log in to unmask]>
> > > >> wrote:
> > > >>
> > > >>> Hi All,
> > > >>>
> > > >>> Just got some black ESD rubber masking boots for some blade
> > > >>> terminals
> > > for
> > > >>> a
> > > >>> board that we dip in Humiseal 1A33, and noticed that there is
> > shadowing
> > > >>> around the base of the terminals like something was repelling
> > > >>> the
> > > coating
> > > >>> away from them, maybe some sort of mold release compound? Tried
> > dipping
> > > >>> without the boots and we don't see the shadow. I got the boots
> > > >>> to
> > keep
> > > the
> > > >>> coating from getting on the terminals so that we weren't sitting
> > there
> > > >>> with
> > > >>> a conformal coat removal pen cleaning the terminals up after we
> > dipped
> > > the
> > > >>> boards.
> > > >>>
> > > >>> I called the manufacturer of the boots and asked about the
> > > >>> issue, and
> > > he
> > > >>> said they would get back to me. Haven't heard anything yet. I'll
> > > >>> try
> > to
> > > >>> get
> > > >>> a picture that shows you what I'm talking about...
> > > >>>
> > > >>> Steve
> > > >>>
> > > >>> --
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