Metal cord-rubber composite materials
AssigneeBridgestone Tire Company Limited
InventorsMasaaki Morimoto, Noboru Kusakabe, Koichi Kojima, Eiichi Koyama
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Abstract
A composite material of rubber and metal cords embedded therein is disclosed. The metal cord is produced by twisting at least three metal filaments, and has an elongation under a load of 5.0 kg/cord (P.sub.1) of 0.2-1.2% and an elongation under a load of 2.0 kg/cord (P.sub.2, %) of P.sub.2 .ltoreq.0.947P.sub.1 -0.043 prior to the embedding in rubber.
Claims8
A composite material of rubber and metal cords embedded therein, characterized in that said metal cord is produced by twisting at least three metal filaments, and has an elongation under a load of 5.0 kg/cord (P.sub.1) of 0.2-1.2% and an elongation under a load of 2.0 kg/cord (P.sub.2) of P.sub.2 (%).ltoreq.0.947P.sub.1 -0.043 prior to the embedding in rubber.
A pneumatic tire having metal cords as a reinforcement for a belt layer, characterized in that said metal cord is produced by twisting four or five metal filaments, and has an elongation under a load of 5.0 kg/cord (P.sub.1) of 0.2-1.2% and an elongation under a load of 2.0 kg/cord (P.sub.2) of P.sub.2 (%).ltoreq.0.947P.sub.1 -0.043 prior to the embedding in rubber having a 50% modulus of 10-40 kg/cm.sup.2.
Dependencies are inferred from the claim text.