Lg Electronics Inc.

Kyoung Ha Lee

Na Jung Cho

Soo Yeon Kim

Kyung Ah Lee

Jin Kyung Park

Cheol Woo Kim

Song Yi Han

Young Woo Kim

Han Jin Jung

Su Yeon Kim

Yoon Hee Nam

Provided is a method of manufacturing a hybrid dip cord, which includes: a step of preparing one nylonyarn or nylonyarn and one aramid yarn; a step of producing a primarily twisted yarn by applying a twist of 200 to 500 TPM by inputting one nylonor nylonyarn longer than the aramid yarn; a set of cabling the primarily twisted yarn as two to apply a twist of 200 to 500 TPM to thereby produce a raw cord; and a step of dipping the raw cord in an adhesive liquid and heat-treat the raw cord, in which the nylonor nylonis heat-shrunk so that the length of the nylonor the nylonbecomes equal to the length of the aramid yarn.

Method of manufacturing a hybrid dip cord having excellent fatigue resistance

Disclosed is a radial tire having a cap ply manufactured with a polyethylene terephthalate dip cord. The radial tire includes: a pair of parallel bead cores; at least one radial carcass ply wound around the bead cores; one or more inclined belt layers layered on the outer circumference of the carcass ply; and one or more cap ply layers layered in the circumferential direction of a tire on the outer circumference of the inclined belt layers, wherein the cap ply includes a dip cord manufactured using a yarn comprising 90 mol % or more of polyethylene terephthalate, and the dip cord has a shrinkage of 3.0-4.0%, a strength of 2.5-3.0 g/d at an elongation of 5%, a breaking strength of 6.5-7.5 g/d, and a dimensional stability index of 5.8-6.5.

Growing community of inventors

Busan, South Korea

Kyoung Ha Lee