One of our customers objects to having pink poly in contact with any of
their
product, but I've checked the TechNet archives, and it seems like pink poly
contamination is a problem that the industry has moved past.

With the older formulations, amines could migrate to the surface and
deposit on the product.  Seems like most of the issues were with
solderability of bare boards after long term storage, or exposure to temp
or humidity extremes.  I seem to remember a GIDEP alert on this, don't
remember when, but it appears that this hasn't been an issue since the
mid-90's.  Pink poly today is made with amides that are bound into the
plastic matrix.

Of course, we use static shielding for anything ESD sensitive, but we do use

pink poly in a number of ways.  At receiving, we see non-sensitive parts
like connectors come in every day in pink poly bags, as do some bare boards.

DIP's and other parts come in anti-static tubes that are then put inside
static
shielding bags.  Pink poly foam is used inside our conductive board boxes,
both
for cushioning, and to provide an insulating and non-static-generating
layer.
And I understand that pink poly is laminated inside static shielding bags
for the
same reason.

We've never seen an issue with contamination, corrosion, or outgassing,
and it will be time consuming and expensive to eliminate pink poly
if we don't have to.  And if it's inside static shielding bags, is it even
possible to get rid of it entirely?

Joe Kane
BAE SYSTEMS Controls
Johnson City, NY



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