A FILTER AND A METHOD FOR MAKING A FILTER

摘要

A method of producing a filter material is disclosed, the method including (i) applying droplets of a bonding agent over at least a portion of a layer of an open fiber matrix (10) to form adhesive contacting regions bound to individual ones of at least some of the fibers of said matrix layer; (ii) applying an adsorbate filter media to at least a part of said portion such that at least some of said adsorbate media is substantially fixed in place in said matrix layer by said adhesive contacting regions, thereby fixing in place adsorbate media whilst maintaining a substantially open fiber structure of said matrix layer. A filter material is also disclosed, comprising an open fiber matrix layer (10) which incorporates an adsorbate filter media and is joined on an upstream side with a support layer, characterized in that said adsorbate filter media is held in place in said matrix layer (10) by droplets of an applied bonding agent which are bound to individual ones of the fibers of said matrix layer in such a manner that said bonding agent does not substantially affect the open fiber structure of said matrix layer.