So far as I understand it, such as there is picks out inks and so on. The
way that it is written "gets" PCB fabrication chemicals as well, but not
fluxes. The environmental legislative trend though is to remove VOC and so
likely it will broaden to encompass liquid fluxes.
Turning to the fluxes that you can buy now that are marketed as VOC free,
then in the picky terms elucidated by Graham they are typically >95% VOC
free compared to only ~5% now.
However I think another way to look at this is to think:
- what is the impact on the flux of higher temperature processing on wave
soldering as brought in by Pb-free?
Or
- what is the best type of flux under the changed circumstances of lead
free?
This requires a slower evaporating flux base and more persistence/activity
during immersion in the wave. Safety legislation would also push you
towards having a non flam material if you could. So if you could get a flux
with those things built in would you buy it? If the answer is no more than
'certainly would look at it' then as it happens you are considering a "VOC
free" material.
So you get improved functionality with a bonus of an environmental benefit
/some future proofing.
Of course the better VOCs work with leaded solders equally well, and give a
smooth transition to lead free, or a single flux type for both, but that is
a matter for specific supplier evaluation.
Hope this helps
Regards
Mike Fenner
Indium Corporation
T: + 44 1908 580 400
M: + 44 7810 526 317
F: + 44 1908 580 411
E: [log in to unmask]
W: www.indium.com
Pb-free: www.Pb-Free.com
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Graham Naisbitt
Sent: Thursday, January 18, 2007 11:24 AM
To: [log in to unmask]
Subject: Re: [TN] VOC free legislation for fluxes
Douglas
As you are in the UK, you need to know that there is no such thing as
VOC free materials in Europe because we (EU) do not differentiate
materials. They are either VOC or they not.
As defined by "Council Directive 1999/13/EC of 11th March 1999:
Organic compound shall mean any compound containing Carbon and at
least one or more of hydrogen, halogens, oxygen, sulphur,
phosphorous, silicon or nitrogen.
9. .emission shall mean any discharge of volatile organic compounds
from an installation into the environment. .into air, soil and water
as well as solvents contained in any products. They include
uncaptured emissions released to the outside environment via windows,
doors, vents and similar openings.
17. volatile organic compound (VOC) shall mean any organic compound
having at 293.15 K a vapour pressure of 0.01kPa or more, or having a
corresponding volatility under the particular conditions of use.
In the USA, the EPA have given a list of tax exempt VOC's that permit
folks to market "VOC Free" products. Kinda wrong ain't it?
It is fair to say that some materials are worse than others but, a
VOC is a VOC. Don't forget Hydrogen Di-Oxide can kill you.
Kindest regards,
Graham Naisbitt
[log in to unmask]
On 17 Jan 2007, at 15:27, Douglas McCall wrote:
> Hi to all,
> Can someone point me in the direction of any legislation that
> relates to the use of flux and future requirements to use VOC
> free flux.
>
> With respect to RoHS or any other specific legislation (such as
> 1999/13/EC),
> will it likely become a requirement (at sometime in the future) to use
> a VOC free flux and will they ban IPA solvent based fluxes.??
>
> Any info will be much appreciated.
>
> Thanks,
> Douglas I McCall
>
> Regards,
> Douglas I McCall,
> TRW Automotive,
> Mill Hill,
> North West Industrial Estate,
> Peterlee, SR8 2HR
> Tel: +44 (0)191 518 8918
> mailto: [log in to unmask]
> web-site: http://www.trwauto.com
>
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