Aromatic polyamide yarn impregnated with lubricating particles, a process for the manufacture of such a yarn, and packing material or rope containing this yarn
AssigneeAkzo N.V.
InventorsWillem C. van Anholt, Martinus W. M. G. Peters
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Abstract
The invention relates to a filament yarn of aromatic polyamides which is impregnated with solid particles of a fluorine-containing polymer and/or graphite. The solid particles are incorporated into the yarn by very uniformly distributing them over the filaments in that the solid particles are applied to the yarn from an aqueous dispersion and the yarn is subjected to a blowing treatment while feeding them at an excess feed rate or not. The yarn thus impregnated is first of all intended to be processed into a packing material or rope.
Claims12
A packing yarn built up of interlaced endless filaments, which yarn is impregnated with a dispersion comprising solid particles selected from the group consisting of fluorine-containing polymer particles and graphite particles, wherein such filaments consist essentially of wholly aromatic polyamide filaments, and wherein the solid particles are distributed over said filaments at the same time the interlacing of the filaments is effected by subjecting the yarn and dispersion to a blowing process while in the wet state, said yarn being fed to the blowing process at a rate in excess of that at which it is withdrawn therefrom, said dispersion being directly applied to the filaments of the yarn in said blowing process by being blown onto said filaments under pressure.
Dependencies are inferred from the claim text.