Spherical object useful as filler material
AssigneeToray Industries, Inc.
InventorsShiro Nishiumi, Shoichi Hasegawa, Toshiyuki Mizoguchi, Sachiko Furuta
Life of this patent
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Abstract
Down-like synthetic filler material comprises a spherical object made up of filamentary material with a denser concentration of filaments near the surface of the spherical object than the filament concentration spaced apart from the surface.
Claims8
A spherical object useful as a filler material having a round cross-section having a diameter of from 5 to 50 mm, said object having a surface shell composed of a plurality of arcuately arranged synthetic organic polymeric filaments of at least 0.2 m in length and between 2 and 20 denier in fineness being concentrated near the surface of said spherical object to form an outer portion near the surface of said spherical object, and said spherical object having a less dense inner portion and an average bulk density of between 1 and 30 mg/cm.sup.3, said filaments being arranged along different arcuate paths which are angularly related to each other such that different filaments intersect with one another at different points relative to the surface of said object, said filaments being adhesively fixed to each other at the points of intersection.
A spherical object having a substantially circular cross-section having a diameter of from 5 to 50 mm, said object having an average bulk density between 1 and 30 mg/cm.sup.3 and comprising a surface shell composed of a plurality of arcuately arranged filaments of polymeric material selected from the group consisting of nylons, polyesters, polyacrylics, polyvinyl alcohols, polyvinylidene chlorides, polyurethanes and polyvinyl chlorides of at least 0.2 m in length and between 2 and 20 denier in fineness, the arcs of said filaments lying substantially upon the plane of said cross-section and having curvatures substantially the same as said circle, said filaments being arranged along different arcuate paths and angularly to each other such that different filaments intersect with one another at different points along the surface of said objects, and an adhesive adjacent the surface of said object and contacting said filaments and binding them together.
Dependencies are inferred from the claim text.