Ith rubber compound on both sides as well as in between synthetic tyre cord threads, hence isolating all cords from each other. As contact between synthetic tyre cord threads does not occur, synthetic tyre cord has the advantage over other reinforcement materials such as canvas fabric of reducing friction and wear between cord threads during compression, bending and stretching, and also greatly improves fatigue resistance, endurance life and pressure-holding performance. Naked and stuffed into container