I need technical info about bypass filters and oil paper for engine filter?

I am living in Iran and working for a company which want to work on producing bypass filters and its oil paper under 50 micron.I need technical info about bypass filters and oil paper for engine filter?
Check out this site... www.wixfilters.com .... in their education area, which is free, they have a great section on everything for filtering products from oil to air to include the priciples of how bypass filters work. They even cover media types and micron ratings.