Patent ID: 7309372
Filing Date: 2007-12-18
Classification: B01D

Abstract:
1. A filtration medium comprising a thermally bonded sheet comprising: (a) about 10 to 90% of a thermoplastic binder fiber having a fiber diameter of 5 to 50 micrometers and a fiber length of about 0.1 to 5 centimeters; and (b) about 10 to 90 wt % of a media fiber having a diameter about 1 to 50 micrometers and an aspect ratio of about 10 to 10,000; wherein the media has a thickness of about 0.1 to 2 millimeters, a solidity of about 2 to 25%, a basis weight of about 2 to 200 g-m −2 , a pore size of about 0.2 to 100 micrometers and a permeability of about 2 to 500 ft-min −1 .