Patent ID: 6983779

Claim:
A lyocell dip cord for tire cord produced by a method comprising the steps of: (A) dissolving 0.01 to 3 wt % of cellulose powder in portions in concentrated liquid N-methylmorpholine N-oxide (NMMO) to prepare cellulose-containing NMMO solution; (B) feeding the NMMO solution and cellulose powder into an extruder having a screw to be subjected to dispersing, mixing, shearing, kneading, melting and measuring ability in the extruder to prepare a swollen and homogenized cellulose solution; (C) spinning the cellulose solution through a spinning nozzle, passing the spinning solution through an air gap to a coagulation bath and coagulating the spinning solution to obtain a multifilament; (D) subject the multifilament to water-wash, drying and oil-treatment, followed by winding; and (E) twisting the wound yarn with a twisting machine to prepare a greige cord, weaving the greige cord and dipping the woven cord in a dipping solution, in which the cord has (1) a tensile strength of 14.0 to 35.0 kgf, (2) a fineness of 2,000 to 7,000 denier, (3) a fatigue resistance of 80% or more, (4) an adhesion to rubber of 10.0 to 17.0 kgf, (5) a twist constant of 0.30 to 0.95, and (6) the sum of elongation at specific load (at a specific load of 4.5 kg) and shrinkage (E-S) of 1.0 to 4.0.