Adhesive-coated multifilament yarn of an aromatic polyamide, a yarn package, a cord, a fabric, a reinforced object and a process for making said yarn

摘要

A multifilament yarn of an aromatic polyamide, in particular poly-p- phenylene terephthalamide, is provided with an adhesive coating of a cured epoxy compound, the yarn having a free epoxide content not higher than 10 mmoles/kg. The yarn is made by spinning a solution of an aromatic polyamide into a coagulation bath and subjecting the resulting filaments to the subsequent steps of washing, applying a curable epoxy compound and one or more alkaline curing agents, curing and winding the yarn thus treated into a package. The resulting yarn can be processed into a reinforcing element for, e.g., tires in a one-step dipping process. A cord made from the yarn displays an improved resorcinol-formaldehyde- latex dip pickup.