Sender: |
|
X-To: |
|
Date: |
Thu, 5 Dec 2019 16:46:56 -0500 |
Reply-To: |
|
Subject: |
|
From: |
|
Message-ID: |
|
In-Reply-To: |
|
Content-Type: |
text/plain; charset="UTF-8" |
MIME-Version: |
1.0 |
Parts/Attachments: |
|
|
Thanks. I will bring that up with Kelly. I am not sure she will reach as
far as uses on components. Guess that does relate to assembly, so maybe
she is interested.
Denny Fritz
On Thu, Dec 5, 2019 at 1:48 PM Bhanu Sood <[log in to unmask]> wrote:
> NMP is used for decapsulation/delayering of certain EEE parts and it is
> called out in standards related to suspect part inspection I have helped
> develop.
>
> On Thursday, December 5, 2019, Dennis Fritz <[log in to unmask]> wrote:
>
> > TechNet friends -
> >
> > I am on a short assignment from IPC Government Relations to decide
> whether
> > to respond to a US EPA Risk Evaluation on some twenty priority chemicals.
> > My assignment is NMP and methylene chloride. Kelly Scanlon of IPC has
> > already spear-headed evaluations of TBBPA for laminate and for
> > formaldehyde.
> >
> > Anyway, we know of NMP use in the multilayer desmear line as a swellant.
> > We are quantifying the use of NMP to dissolve polyimide (and perhaps
> other
> > resins) to be able to coat electronics substrates.
> >
> > What we don't know is whether NMP (CAS number 872-50-4) is used in other
> > circuit board applications, or used in mixtures for stripping or cleaning
> > electronics. Can you help?
> >
> > Last, I remember huge amounts of methylene chloride (CAS number 75-09)
> > being used in the old days of solvent photoresist, but those products are
> > long gone. Does your now company use methylene chloride, alone or in
> > mixtures - again for stripping or cleaning electronics?
> >
> > If you wish to respond off-line, that is fine with me.
> >
> > Denny Fritz
> > Consultant
> >
> >
> > --
> > Denny Fritz
> > Consultant
> > 812 584 2687
> >
>
>
> --
> Bhanu Sood
> Tel: (202) 468-8449
>
--
Denny Fritz
Consultant
812 584 2687
|
|
|