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Assignee3M Innovative Properties Company
InventorsMario A. Perez, Diane R. Wolk, Betty Z. Mei, Seyed Abolhassan Angadjivand, Michael D. Swan
Estimating the term…
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 waterjets, 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.
A microfibrillated article comprising a highly oriented melt processed film, having at least one surface comprising charged, melt processed, non-conductive, oriented polymeric microfibers having an average effective diameter of less than 20 microns and a transverse aspect ratio of from 1.5:1 to 20:1.
A process for preparing a charged, microfibrillated article comprising the steps of:
Dependencies are inferred from the claim text.