Fiber having increased filament separation and method of making same
AssigneeToray Fluorofibers (America), Inc.
InventorsKishio Miwa, Eric Winters
Life of this patent
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Abstract
A flock material exhibiting an increased degree of filament separation prepared by cutting a fluoropolymer or carbon fiber yarn into lengths, introducing mechanical energy into the lengths in order to cause the lengths to separate into single-filaments fibers and removing or classifying at least a portion of the single-filament fibers from the lengths in order to obtain a flock having a particular fraction of single-filament, fluoropolymer or carbon fibers.
Claims85
A material prepared from a plurality of lengths of a multifilament fiber, the material having a filament separation of greater than 80% by weight.
A method of making a flock or staple prepared from a yarn comprising,
- cutting the yarn into multifilament pieces, and
- processing the multifilament pieces with an air classification mill.
A material comprising,
- single-filament fibers prepared by processing a yarn with an air classification mill.
A method of varying the physical arrangement of a material including at least one of a fluoropolymer fiber or a carbon fiber, the method comprising, processing the material with an air classification mill.
A material prepared from a plurality of lengths of a 5.5 denier to 7.7 denier fluoropolymer fiber having a diameter of about 15.3 micrometers up to about 21 micrometers wherein more than 80% by weight of the material is present as individual fluoropolymer filaments.
Dependencies are inferred from the claim text.