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Date: | Wed, 21 Jun 2017 20:23:33 -0400 |
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Mike is correct. They use or at least used, tallow amines. Pretty yucky stuff.
Bev
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Mike Fenner
Sent: Wednesday, June 21, 2017 5:32 PM
To: [log in to unmask]
Subject: Re: [TN] Coating Boots/Caps/Plugs
Cheaper ESD grades of pink poly can exude their impregnated "ESD stuff" as well having a silicone style release compound.
Mike
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--- Original message ---
From: Joyce Koo <[log in to unmask]>
Sent: 21 June 2017 17:04:54
To: [log in to unmask]
Subject: Re: [TN] Coating Boots/Caps/Plugs
> Some pink poly left mark on lcd screen. majority do left something,
> you just not look or detect closely.
>
> Sent from my BlackBerry 10 smartphone.
> Original Message
> From: Stadem, Richard D.
> Sent: Wednesday, June 21, 2017 11:01
> To: [log in to unmask]
> Reply To: TechNet E-Mail Forum
> Subject: Re: [TN] Coating Boots/Caps/Plugs
>
> Not all silicone-bearing products will contaminate product or worksurfaces.
> Silicone-bearing plastics may be perfectly safe if the silicone is
> tightly bound as part of the material. It needs to be evaluated on a
> case-by-case basis.
> For example, pink poly commonly used for temporary packaging of some
> ESD parts is verboten in our factory because most of them contain
> silicone that is not tightly-bound and can contaminate everything it comes in contact with.
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Bob Wettermann
> Sent: Wednesday, June 21, 2017 8:55 AM
> To: [log in to unmask]
> Subject: [TN] Coating Boots/Caps/Plugs
>
> All:
>
> After the last discussion of masking tape I happened to be involved
> soon thereafter in a time study of using re-usable
> "boots"/"caps"/"plugs" to protect components in the conformal coating process.
>
> Like most who perform coating we spend an AWFUL lot of time masking
> and demasking in these projects and are always looking for the best method.
>
> We have used the silicone-based boots and have been successful on
> larger repeated projects to use them 250-300X. They are fine for spray
> coating for medium density boards.
>
> The time to mask and demask ,depending on the complexity of the part
> and coating being applied as well as the application method determines
> whether or not the boots make sense. We are partial to the
> silicone-based boots (though with the caveat described in the previous
> posting about trying to get silicone out of the shop-especially for medical applications).
>
> I am wondering if there have been any favorite materials for these
> boots amongst the coating community other than silicone? If so how do
> you find the boot matches your process and actually derives the time-savings benefit.
>
> Thanks
>
> --
> Bob Wettermann
> BEST Inc
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