Frequently Asked Questions
Learn more on what Sterlitech Corporation has to offer. Find answers to your questions about our filtration products here!
PTFE FAQ
Do you need a Chemical Compatibility Chart?
We have a Chemical Compatibility Chart that you can use for reference.
How are ePTFE membranes characterized?
Aspire membranes are assigned a reference pore size according to bubble point test data but, there are other ways to characterize a membrane:
- Absolute Pore Size
- Bubble Point
- Mean Pore Flow
- Nominal Pore Size
- Retention Rating
Which side of a laminated PTFE membrane should face the solution?
A. The Smooth PTFE side should face towards the feed solution or liquid ingress.
Are the Advantec unlaminated PTFE hydrophilic membrane filters permanently hydrophilic?
The Advantec unlaminated PTFE hydrophilic membrane filters are not permanently hydrophilic. Once wetted, they will become hydrophobic if allowed to dry. Also, they will become hydrophobic if autoclave sterilized or otherwise exposed to temperatures >100°C.
What are the advantages of PTFE membrane filters?
PTFE Membranes are extremely hydrophobic and exhibit superior chemical compatability with agressive solutions.