Splittable multicomponent fibers containing a polyacrylonitrile polymer component
AssigneeFiber Innovation Technology, Inc.
InventorJeffrey S. Dugan
Life of this patent
Estimating the term…
Abstract
Disclosed are melt processable multicomponent fibers in which at least one component includes a polyacrylonitrile polymer and at least one component includes a polyolefin polymer. The melt processable multicomponent fibers of the present invention may be mechanically split into microfilaments formed entirely of the respective components. The fibers of the present invention may be used in a variety of textile applications, including in electret filter media.
Claims38
A mechanically splittable multicomponent fiber having an outer peripheral surface comprising;
- at least one polymer component comprising a melt processable polyacrylonitrile polymer;
- and
- at least one polymer component comprising a polyolefin, wherein each of said polymer components forms a portion of the outer peripheral surface of said fiber to form distinct unocclusive cross-sectional segments along a length of the fiber so that said components are not physically impeded from being separated from one another, the weight ratio of said polyacrylonitrile component to said polyolefin component ranges from about 80/20 to about 20/80, and the fiber has a pie/wedge configuration.
A mechanically splittable multicomponent fiber having an outer peripheral surface comprising:
- at least one polymer component comprising a melt processable polyacrylonitrile polymer;
- and
- at least one polymer component comprising a polyolefin, wherein each of said polymer components forms a portion of the outer peripheral surface of said fiber to form distinct unocclusive cross-sectional segments along a length of the fiber so that said components are not physically impeded from being separated from one another, the weight, ratio of said polyacrylonitrile component to said polyolefin component ranges from about 80/20 to about 20/80, and the fiber is a segmented round fiber having a round cross-sectional configuration and comprises a plurality of polymer segments formed of a melt-processable polyacrylonitrile polymer alternating with a plurality of polymer segments formed of a polyolefin polymer.
A mechanically splittable multicomponent fiber having an outer peripheral surface comprising:
- at least one polymer component comprising a melt processable polyacrylonitrile polymer;
- and
- at least one polymer component comprising a polyolefin, wherein each of said polymer components forms a portion of the outer peripheral surface of said fiber to form distinct unocclusive cross-sectional segments along a length of the fiber so that said components are not physically impeded from being separated from one another, the weight ratio of said polyacrylonitrile component to said polyolefin component ranges from about 80/20 to about 20/80, and the fiber is a segmented ribbon fiber having a rectangular cross-sectional configuration and comprises a plurality of polymer segments formed of a melt-processable polyacrylonitrile polymer alternating with a plurality of polymer segments formed of a polyolefin polymer.
A mechanically splittable multicomponent fiber having an outer peripheral surface comprising:
- at least one polymer component comprising a melt processable polyacrylonitrile polymer;
- and
- at least one polymer component comprising a polyolefin, wherein each of said polymer components forms a portion of the outer peripheral surface of said fiber to form distinct unocclusive cross-sectional segments along a length of the fiber so that said components are not physically impeded from being separated from one another, the weight ratio of said polyacrylonitrile component to said polyolefin component ranges from about 80/20 to about 20/80, and the fiber is a segmented multilobal fiber.
Dependencies are inferred from the claim text.