Patent ID: 6896930

Claim:
A method for manufacturing a polyester fiber cord for reinforcing rubber materials having an activated adhesive property to rubber materials which comprises the steps of: applying a first aqueous processing liquid comprising a blocked polyisocyanate compound to a polyester fiber, that has been beforehand provided with an epoxy compound during a yarn manufacturing process or in a state of a twisted cord to activate adhesion, in an amount of 0.5 to 5.0% based on the fiber weight in terms of solids of the blocked isocyanate compound, wherein the first aqueous processing liquid does not include a carrier; drying the treated yarn at a yarn temperature of ≧(A+20)° C., wherein A° C. is a dissociation temperature of the blocked isocyanate, subjecting the dried yarn to heat treatment; applying a second processing liquid comprising resorcin-formalin-rubber latex to the resultant yarn, and subjecting the yarn to heat treatment.