wheel. The core material is high tensile strength, high fatigue strength steel wire often
coated with substances like copper or bronze to increase its adherability to rubber. Steel
wire quality is based on tensile strength, elongation and stiffness. It is manufactured from
steel rood with high carbon content.
One difference between the multi – ply tyre and the belted tyre is the property of
the steel cord that is used. In the former, the fatigue life of the steel cords will be the
dominating aspect while in the latter; the stiffness will be of primary concern.
High tensile brass coated steel cords (multi strand) are used in the construction of
tyre breaker belts as well as the casing ply in many truck tyres. The brass coating is done
because rubber will not adhere to bare steel. Also, more the rubber penetrates, more is the
rust resistance. And though the steel cords come in various configurations such as in
cross sections of pairs and triplets, all are brass – coated strands twisted together into
cords.
The storage of these brass coated steel cords should be in a temperature and
humidity controlled environment (the creel room). Even the distance between the creel
room and the calendar must not be too large. Otherwise, corrosion due to moisture may
cause the steel belts to lose adhesion with rubber.
No comments:
Post a Comment