Nonwoven filter and method of manufacture

Details Nonwoven filter and method of manufacture Nonwoven filter and method of manufacture

D - Textiles, Paper

04

H

D04H 1/56 (2006.01) A24D 3/02 (2006.01) B01D 39/16 (2006.01) B29C 55/06 (2006.01)

Patent

CA 2082058

2082058 9117297 PCTABS00008 A filter useful as a cigarette smoke filter is made by convergingly passing a flat restrained meltblown web successively through a heated zone (36) and a trumpet (24) to form a roving (25). The roving may be processed to make filters. The process results in stretch orientation of longitudinal fibers and bulking due to cross fibers. Primary and secondary pleats formed in the web are bundled into a cylindrical roving. The pleats add bulking to the web and provide fluid permeability through the filter.

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