Ken, Bev is correct, TBBPA which is the usual brominated retardant in FR4
(anybody heard of anything else being used?) is not currently targeted by
the RoHS legislation. There were rumblings coming from Scandinavia 12 months
or so ago about including TBBPA in the list of materials not to be used for
products carrying the Nordic environmental swan mark, but as far as I'm
aware it never went any further. The so-called halogen free PCB materials
(or at least the ones I've looked into for interest) use phosphorus as the
retardant.
Regards
Ian Fox
Goodrich ECS
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bev Christian
Sent: 09 June 2005 14:06
To: [log in to unmask]
Subject: Re: [TN] Fire Retardant
Ken,
Difunctional epoxies begin with brominated bisphenol-A epoxy resin as the
basic building block of FR-4. Most normal boards are NOT using any PBDE's.
Tetrabromobisphenol-A (TBBPA, I may have one too many B's in the
abbreviation, I'm not a board chemist.) is not an additive, but makes up a
large part of the actual board chemistry. There is a report out there that
shows that this material is not in the same league as the PBDE's for
bioaccumulation and is NOT included in the ban. How that helps. Regards,
Bev RIM
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bloomquist, Ken
Sent: June 9, 2005 8:52 AM
To: [log in to unmask]
Subject: [TN] Fire Retardant
What is the PWB industry using for a fire retardant to replace PBDE's.
Thanks,
KennyB
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e To
unsubscribe, send a message to [log in to unmask] with following text in the
BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or
(re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------
---------------------------------------------------------------------
This transmission (including any attachments) may contain confidential
information, privileged material (including material protected by the
solicitor-client or other applicable privileges), or constitute non-public
information. Any use of this information by anyone other than the intended
recipient is prohibited. If you have received this transmission in error,
please immediately reply to the sender and delete this information from your
system. Use, dissemination, distribution, or reproduction of this
transmission by unintended recipients is not authorized and may be unlawful.
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e To
unsubscribe, send a message to [log in to unmask] with following text in the
BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or
(re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet
NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send
e-mail to [log in to unmask]: SET Technet Digest Search the archives of
previous posts at: http://listserv.ipc.org/archives Please visit IPC web
site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
|
