FILTRATION MATERIALS USING FIBER BLENDS THAT CONTAIN STRATEGICALLY SHAPED FIBERS AND/OR CHARGE CONTROL AGENTS

摘要

A filtration material comprising a blend of polypropylene and acrylic fibers of round, flat, dog bone, oval or kidney bean shape in any size from 0.08 to 3.3 Dtex. A preferred blend contains about 50 weight percent polypropylene fibers and about 50 weight percent acrylic fibers. The fibers can be blended ranging from 90:10 to 10:90 polypropylene to acrylic. The shape contains 25 weight percent round, flat, oval, dog bone and kidney bean shapes. The fiber blend contains 25 weight percent of at least one size between 0.08 and 3.3 Dtex. Electret fibers incorporated within these blends have 0.02 to 33 weight percent of a charge control agent. These fibers can be used in producing electret material by corona or triboelectric charging methods.

主权项

1. A method of making fibers used in a non-woven electret gas filter media, the method comprising:
(a) wet spinning a plurality of acrylic fibers; and (b) adding, during the step of wet spinning, an organic wax to the fibers in a range of about 0.05 percent to about 5.0 percent by weight.