Tire with three elastomeric protective layers located in the bea

Details Tire with three elastomeric protective layers located in the bea Tire with three elastomeric protective layers located in the bea

1989-08-17

1991-07-23

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152539, 152543, 152546, B60C 1506

Patent

active

050335243

ABSTRACT:
A tire for a large vehicle includes bead portions having bead cores around which a carcass ply layer is turned up from an inside to an outside of the tire. The tire includes a first elastomer protective layer A, a second elastomer protective layer B and a third elastomer protective layer C. These protective layers A, B and C have dynamic storage moduli E' A: 7-20.times.10.sup.7 (dyn/cm.sup.2), B: 10-25.times.10.sup.7 (dyn/cm.sup.2) and C: 2-10.times.10.sup.7 (dyn/cm.sup.2) and relations of the dynamic storage moduli in B>A>C, B-A>2.times.10.sup.7 and A-C>2.times.10.sup.7, and have loss tangents .delta. A: 0.15-0.22, B: 0.18-0.25 and C: 0.05-0.16 and a relation of loss tangents in B>A>C.

REFERENCES:
patent: 4227563 (1980-10-01), Grosch et al.
patent: 4387759 (1983-06-01), Obata et al.
patent: 4508153 (1985-04-01), Tanaka et al.

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