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Posted By Anthony Edwards
Hi
An engineering firm use an electrostatic paint spraying system to paint various items.
The filters are changed on a regular basis and when in a skip they self ignited, apparently this has happened before.
There is a strict no smoking policy and no evidence of people smoking in the area. Luckily an employee saw the fire and extinguished it whilst it was in its infancy.
Any ideas why it happened?
Many thanks in advance
Regards
Nutty
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Rank: Guest
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Posted By Guderian
Chemical decomposition or reaction with something elses already in the skip etc?
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Rank: Guest
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Posted By Paul Leadbetter
Nutty
Some paint systems can self-ignite if they cure by chemical reaction (which usually generates heat). If the heat of reaction cannot dissipate, the paint gets hotter, which makes the reaction proceed more quickly and the runaway reaction eventually causes the paint to ignite. The risk of this should be mentioned on the MSDS.
Paul
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Rank: Guest
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Posted By D. Hilton
This reaction is more likely to occur within filters that are changed out on a frequent basis i.e. containing less paint.
Others factors having an effect are:
Increased filter packing density.
Use of Higher VOC paints or the addition of VOC (Xylene) to low VOC paints.
Compressing the disposed filters within the waste bins provided.
This reaction is less frequent within fibre glass filters than paper but is common to both.
Best form of control is to review the VOC content of the paint and to segregate disposal to a metallic container with lid of limited capacity.
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