Electronics Forum | Tue Aug 19 11:31:43 EDT 2003 | davef
JEDEC standard EIA/JEP124 Section 5.2.1 Packing Moisture-Sensitive Components has words to the effect: "...Partially or lightly evacuate the bag to reduce packaging bulk and heat seal the bag as close to the end as possible following the heat sealing
Electronics Forum | Wed May 04 15:01:23 EDT 2005 | Dr. Klein
Thanks siverts, The problem with open the sealed MSD bags before the production, is from the rezone that we don�t know exactly when the production start. If we will open the bags before production there is a possibility that the component will be ou
Electronics Forum | Wed Jun 15 13:47:28 EDT 2005 | russ
No you're not stupid, they will melt if the top of the board gets real hot. I was lucky most likely in that ours were usually off of the board surface. anything that will hold the weight material will work. Now that I think about it my shot bags w
Electronics Forum | Sun Jan 22 20:53:01 EST 2023 | proy
We reuse ESD bags as much as possible and customers are satisfied - however they seem to accumulate here! I have boxes of used ESD shielding bags which are too good to scrap and can be reused. I need my space, so you pay shipping and I will send the
Electronics Forum | Fri Dec 13 19:01:14 EST 2002 | Tooling Guy
I have heard of people using tiny lead-shot filled bags to hold down thru-hole components on circuit boards while running through a wave solder machine on selective solder pallets. How successful has this been? What kind of material is being used f
Electronics Forum | Fri Feb 03 09:44:26 EST 2006 | amol_kane
Hi James, As far as i can see, if you reseal the bags, then storing in a dry cabinet would be unuseful (as the McDry will no longer be able to absorb moisture from the components, and the dry bag will only be as effective as the desiccant in it) i t
Electronics Forum | Tue Oct 17 20:15:12 EDT 2006 | davef
In the past, black poly was used as a bridge between pink poly and shield bags because of slightly lower cost and offering some shielding as opposed to none with pink poly. However, as the price of shield bags continue to drop the usage of black poly
Electronics Forum | Wed May 16 13:40:19 EDT 2007 | slthomas
"I read a study a while back by IBM that showed too strong a vacuum would cause too much moisture to enter the bags." That's what the nitrogen is for. If you pull a vacuum w/o backfilling with something dry, like nitrogen, pretty soon the vacuum ove
Electronics Forum | Wed Aug 26 05:58:17 EDT 2009 | grahamcooper22
Hi, I have no experience of the ZIP TOP bag you refer to but my advice is to follow the guideline of IPC JEDEC 33 for sealing bags containing MSDs....it states' the MBB should be heat sealed'. I cannot imagine that a ZIP will keep the moisture out an
Electronics Forum | Mon May 21 17:32:23 EDT 2001 | davef
I said: "Our electronic circuit board fabricators seal the boards in moisture barrier bags [MBB]. We discontinued the use of desiccant bags in these MBB because of concerns about the desiccant releasing materials that would affect the solderability
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