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Coalescing filter media

  • US 10,625,196 B2
  • Filed: 05/31/2016
  • Issued: 04/21/2020
  • Est. Priority Date: 05/31/2016
  • Status: Expired due to Fees
First Claim
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1. A method for filtering an oil, lubricant, and/or cooling agent from a gas stream, the method comprising:

  • passing the gas stream including the oil, lubricant, and/or cooling agent through a filter element, wherein the filter element comprises a fiber web wrapped around a core such that at least two layers of the fiber web are formed, the fiber web comprising;

    a plurality of fibers having an average fiber diameter of at least 0.01 microns and less than or equal to 50 microns;

    a basis weight of at least 1 g/m2 and less than or equal to 270 g/m2; and

    a thickness of at least 0.01 mm and less than or equal to 5.0 mm,wherein the fiber web has an oil repellency level of between 4 and 6;

    wherein the fiber web has an oil carry over of less than 20%, andwherein the oil, lubricant, and/or cooling agent has a surface tension of between 22 mN/m and 33 mN/m measured at 23°

    C. and 50% RH.

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