Patent ID: 7896941
Filing Date: 2011-03-01
Classification: B01D,Y10S

Abstract:
1. A pleatable multi layer gas filter media having at least dual layer gradient density comprising: a first layer composed of a first fiber blend having a first average fiber size and an amount of first single component fibers, a second layer composed of a second fiber blend having a second average fiber size and an amount of second single component fibers, said first average fiber size being greater than said second average fiber size, said first fiber blend having a portion larger than or equal to a largest single component fiber size of said amount of second single component fibers, said second fiber blend having a portion less than or equal to a smallest single component fiber size of said amount of first single component fibers; and, said first and second layers being compressed multi layer partially melted or fuse bonded; wherein each of said layers are individually carded to create said gradient density.