In order to solve the problem of serious powder drop of water-blocking yarn during the production process of totally dry optical cable

a new manufacturing process of water-blocking yarn was developed in this paper. The prepolymer of high water absorbable performance resin is synthesized first. The resin with high water absorbility is then polymerized on the matrix yarn by coating and curing process. Finally

the water resistance resin and the base yarn are integrated into one. Testing result indicates that the performance of the water blocking yarn can completely meet the requirements of the communication industry standard and the technical specifications of the cable manufacturers. The process test of the optical fiber cable production shows that the water blocking yarn produced by the above technology can be applied to manufacture totally dry optical cable

and can solve the problems of powder drop and dust pollution.