Product category:
Couplings, Seals, Gaskets
News Release from: Biopharma Process Systems | Subject: Parylene surfaced diaphragms
Edited by the Processingtalk Editorial
Team on 22 January 2004
New Asepco Parylene surfaced diaphragms
New parylene surfaced diaphragms to compliment the successful ASEPCO aseptic valves are now available from Biopharma Process Systems, offering the user a wider choice of elastomeric sealing material
New and innovative parylene surfaced diaphragms to compliment the highly successful ASEPCO aseptic valve range are now available from Biopharma Process Systems, offering the user a wider choice of elastomeric sealing material Parylene is deposited as a powder and flows in a vacuum, forming an impermeable conforming surface coating
This article was originally published on Processingtalk on 12 Feb 2003 at 8.00am (UK)
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The two main benefits of parylene can be summarised.
First, increased diaphragm life (double the life of our standard silicone and EPDM diaphragms).
Second, increased chemical resistance.
For over 30 years Parylene has been used in medical device applications (Pacemakers).
Parylene, like Teflon, is hydrophobic, highly resistant to chemical attack and is insoluble in all organic solvents up to 150C.
It is also resistant to permeation by most solvents with the exception of aromatic hydrocarbons.
Parylene is a conformal coating that covers all surfaces of a part equally.
Since parylene coating is of high molecular weight and a linear, crystalline polymer having an all carbon backbone, without any oxygen, nitrogen or sulphur atom links in the backbone, it is hydrophobic.
This carbon backbone coupled with its substantial crystalinity makes Parylene highly stable and highly resistant to chemical attack. Request a free brochure from Biopharma Process Systems ...
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