Charged microfibers, microfibrillated articles and use thereof

Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Staple length fiber

Reexamination Certificate

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C428S370000, C428S397000, C428S399000

Reexamination Certificate

active

06849329

ABSTRACT:
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.

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