Patent ID: 8562875
Filing Date: 2013-10-22
Classification: B01D,B01J

Abstract:
1. A method of forming a heat fused composite filter media pad comprising the steps of: a) providing an adsorbent material selected from diatomaceous earth, silica, glass, and a zeolite, and a water-insoluble thermoplastic binder dispersed in water selected from polyolefins, polyethylene, polypropylene, ultra-high molecular weight polyethylene, and mixtures thereof; b) blending the adsorbent material and the binder dispersed in water in a binder:adsorbent proportions about 1:1 to about 1:3 by weight; c) forming a liquid slurry from the blended adsorbent material and binder; d) filtering the slurry to draw off the liquid; e) thermally bonding the adsorbent particles together by partially melting or softening the binder; and f) forming a heat fused composite filter media pad substantially devoid of cellulose and a thermoset binder, having a thickness about 2 mm to 4 mm.