foam life

jaya000 · 11th December 2008, 03:03 AM

We fit Reticulated Sponge/foam in front of speaker & behind metal grill to avoid dust reaching speaker. In the market few people sale this item. How to assure at our end, which has better life or long lasting.
this is about pro speaker.

John Sheerin · 12th December 2008, 04:36 PM

Put the foam in a thermal chamber at ~80C, 98% relative humidity for 400 hours. Another good one is to expose it to intense UV radiation (if it will be exposed to the sun), but I forget the spec on that. Those are auto industry accelerated tests that tend to degrade foam. They are typically designed to predict a 10 year product life.

jaya000 · 12th December 2008, 04:43 PM

Thank u John Sheerin.
U hv given nice perfect idea.
One person is testing the foam by putting in xylene solvent.
Then selects the one which melts late.
I can't find any reference about this anywhere.

11th December 2008, 03:03 AM	#1
jaya000 diyAudio Member Join Date: Dec 2006	foam life We fit Reticulated Sponge/foam in front of speaker & behind metal grill to avoid dust reaching speaker. In the market few people sale this item. How to assure at our end, which has better life or long lasting. this is about pro speaker.

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12th December 2008, 04:36 PM	#2
John Sheerin diyAudio Member Join Date: Nov 2003 Location: Pittsburgh, PA	Put the foam in a thermal chamber at ~80C, 98% relative humidity for 400 hours. Another good one is to expose it to intense UV radiation (if it will be exposed to the sun), but I forget the spec on that. Those are auto industry accelerated tests that tend to degrade foam. They are typically designed to predict a 10 year product life.

12th December 2008, 04:43 PM	#3
jaya000 diyAudio Member Join Date: Dec 2006	Thank u John Sheerin. U hv given nice perfect idea. One person is testing the foam by putting in xylene solvent. Then selects the one which melts late. I can't find any reference about this anywhere.

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