The invention relates to the field of aircraft
tire manufacturing, in particular to a preparation method of an
aramid fiber and nylon framework material for an aircraft tire cap strip. The method comprises the steps that S1, first twisting is conducted, specifically, a strand of 1100 dtex
aramid precursor
yarn is twisted on a ring twisting
machine, the twisting direction is the Z direction, the twisting degree is 240-300 twists per meter, and three parts of
aramid precursor
yarn are twisted; a strand of 940 dtex nylon protofilament is twisted on a ring twisting
machine, the twisting direction is the Z direction, the twisting degree is 160-200 twists per meter, and two parts of nylon protofilament are twisted; s2, plying and twisting: plying the twisted three parts of aramid
fiber strands and two parts of nylon strands, and twisting the plied yarns along a reverse S direction with the twist degree of 240-300 twists per meter to obtain blended cords; s3, gum dipping; and S4, preparing a finished cotton
rope, namely putting the blended cotton
rope into a drawing
machine, and drawing at 210-235 DEG C to obtain the finished cotton
rope. Nylon with low
linear density is selected, and the holding force is increased through a multi-strand twisting process, so that the effect of improving the strength is achieved, the cost is reduced, and the physical and chemical indexes are improved compared with those of a previous patent product.