Patent ID: 6627088
Filing Date: 2003-09-30
Classification: A01N,A61L,B01D,C12N,Y02A,Y10S

Abstract:
A shaped article which is suitable for use as a biocidal depth filter and which consists essentially of fibrous materials having incorporated therein biocide particles of cross-linked crospovidone-iodine and a urea/formaldehyde condensation product in form of highly dispersed polymer granules, said shaped article being obtained by a process comprisingproviding an aqueous pulp comprising the fibrous materials, the crospovidone-iodine particles, and the urea/formaldehyde condensate granules, spreading the aqueous pulp on a wire and subsequently partially dewatering the spread pulp, and drying the partially dewatered pulp, wherein the depth filter has a thickness of from 0.1 to 10 mm and an area weight of from 20 to 3,500 g/m2, and comprises the crospovidone-iodine particles in an amount of from 0.5 to 75% by weight, based on the dry weight of the shaped article.