Byelorussian Steel Works (BMZ) - Management Company of “Byelorussian Metallurgical Company” Holding, Steel Cord and Wire Products Research Centre (Zhlobin, Republic of Belarus):

A. V. Vedeneev, metsc@bmz.gomel.by

Latest tire life requirements gave rise to steel cord constructions with a complete rubber penetration into steel cord structure to be used in tire breaker layers. Since 2004 BMZ worked out methods and steel cord constructions having "Betru" advantages and eliminating drawbacks found in the above concept. Tire cord constructions manufactured with the new technology were designated "FRP" (Full Rubber Penetration). When processing open steel cord constructions in calenders, “openness” decreases or even disappears completely due to filament tension, i.e. rubber compound penetration inside steel cord is hampered. We can assert that introduction of "Betru" or "FRP" steel cord is a promising direction of further development of steel cord constructions for breaker layers of tires requiring reinforcing materials with high level of adhesion to rubber, complete compound penetration into the structure, and absence of inner layer wire migration with regard to outer layer wires. Besides, "FRP" steel cord has a number of significant advantages compared to other types of steel cord. That’s why it s reasonable to manufacture existing types of steel cord and develop new construction based on FRP technology. Thus, we can assert that introduction of "Betru" or "FRP" steel cord is a promising direction of further development of steel cord constructions for breaker layers of tires requiring reinforcing materials with high level of adhesion to rubber, complete compound penetration into the structure, and absence of inner layer wire migration with regard to outer layer wires.

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