B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
25/124, 18/501
B01J 13/02 (2006.01) B22F 1/00 (2006.01) B22F 9/08 (2006.01) B29C 49/00 (2006.01) B29C 70/14 (2006.01) B29C 70/66 (2006.01) C03B 19/10 (2006.01) C22C 47/00 (2006.01)
Patent
CA 1321453
ABSTRACT Fiber reinforced hollow film forming material microspheres of substantially uniform diameter of 200 to 10,000 microns and of substantially uniform wall thickness of 1.0 to 1000 microns, wherein the fibers are uniformly distributed in the walls of the microspheres and the microspheres are free of latent solid or liquid blowing gas materials or gases and the walls of the microspheres are substantially free of holes, relatively thinned wall portions or sections and bubbles. A method for making fiber reinforced hollow microspheres from a film forming material comprises adding fibers to a film forming material, uniformly dispersing the fibers in the film forming material, forming a liquid film of the fibers and film forming material across an orifice, applying a blowing gas at a positive pressure on the inner surface of the liquid film to blow the film and form the microsphere, subjecting the microsphere during its formation to an external pulsating or fluctuating pressure field having periodic oscillations, such pulsating or fluctuating pressure field acting on the microsphere to assist in its formation and to assist in detaching the microsphere from the orifice, hardening the microspheres and obtaining hollow fiber reinforced microspheres having fibers uniformly distributed in the walls of the microspheres. The fiber reinforced hollow film forming material microspheres 17 can be used as filler materials in plastics, in plastic foam compositions and in concrete and asphalt compositions.
529246
Borden Ladner Gervais Llp
Cochran Joe K. Jr.
Materials Technology Corporation
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