Charged, high-strength, high-modulus, melt-processed microfibers, films
having a charged, microfibrillated surface, and methods of making the same
are described. Charged microfibrillated articles of the invention can be
prepared by imparting fluid energy, typically in the form of high-pressure
water jets, to a highly oriented, highly crystalline, melt processed film
to liberate microfibers or microfibrous flakes therefrom. Microfibrillated
articles of the invention find use as tape backings, in the preparation of
woven or nonwoven articles, filters for particulate contaminants, such as
face masks and water or air filters, fibrous mats, such as those used for
removal of oil from water, wipes for dust or debris removal, and thermal
and acoustical insulation.
