Porous Plastic

GMitchell · Sep 15, 2003

I am looking for a material that will create a liquid barrier but at the same time allow for air to be pressed through it as a cavity is filled with 250F liquid. I was considering polyethylene(a molded part) but am not sure of the cost effectiveness of this material. Any suggestions?
Constraints are:
Flexible
Allow airflow while maintaining liquid barrier
Function at temperatures around 250F
Cost effective

TIA

patprimmer · Sep 15, 2003

Semi permiable membranes made from PP are avaliable, but are very expensive, and while they are impervious to water, and permiable to gas, the gas will only pass through them quite slowly

The company I know that manufactures them is Akzo Nobel. As I understand it, the technology was originally developed for kidney dialysis

Regards
pat

GMitchell · Sep 16, 2003

Thank you for the reply but the cost requirement is one of the biggest issues I am facing. Production will be high volume and current cost is very minimal. There is a safety concern that could warrant more expense but only to a certain degree. Any more ideas??

zittz · Sep 30, 2003

I am familair with this Company they may have what you need.I have used these products for many uses.There site is

http://www.ECTofGeorgia.com.

It is Custom designed to your Soils,It is Pretty Impresive.Good Luck!

GMitchell · Sep 30, 2003

Very helpful website and thank you for the suggestion just not quite what I am looking for I don't think. The guidelines for the project seem to be changing course a little(go figure) so I will let you know what we come up with.

zittz · Sep 30, 2003

Im glad you found this site informative.If your not sure of the material they have Contact Mike you'll find his contact on the site. Tell him 28 referred you,(My company code). He will give you all the details to see if this is what you need.

Have a Great Day!

aspearin1 · Oct 8, 2003

Are you hoping to find a membrane that will act as a check valve for air pressure release? I think I follow. You may consider using a rubber septum, similar to those used in injection bottles. It allows you to insert a syringe and remove it, and maintain it's seal. You could insert a syringe into the head space to let the gas escape, and remove it once the container is full.

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