Fiber coated with water blocking material
AssigneeE.I. du Pont de Nemours and Company
InventorsSerge Rebouillat, Friedrich V. Pfister
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Abstract
The present invention relates to a fiber coated with a water blocking material that includes an essentially water free dispersion comprising a superabsorbent polymer and a dispersing medium. The fibers made according to this invention may be used, for example, as fiber reinforcing material used in the manufacture of cables, and in particular in yarns for fiber optical cables that use optical light wave guides for optical communication transmissions.
Claims11
In a process for preparing a superabsorbent polymer by providing an aqueous monomer solution, raising the temperature of the monomer to initiate the polymerization of the monomer, maintaining the temperature during the polymerization, and evaporating the water to produce a polymer, the improvement which comprises providing a shearing rate of at least 10,000 revolutions per minute during the entire process to produce a polymer having a particle size below 100 microns.
Dependencies are inferred from the claim text.