Resilient tires and wheels – Tires – resilient – Anti-skid devices
Patent
1988-02-17
1989-10-03
Hoch, Raymond
Resilient tires and wheels
Tires, resilient
Anti-skid devices
152527, 152548, 524495, 524514, B60C 918, C08K 300
Patent
active
048710040
ABSTRACT:
Aramid-reinforced elastomers, including rubber, in which the elastomer is reinforced with aramid in the form of short, discontinuous, fibrillated fibers, are disclosed. The fibers are composed of a trunk portion having a length of about 0.2-5 mm, a diameter of about 0.005-0.02 mm (5-20 micrometers), and an aspect ratio greater than 100, and numerous fibrils extending outwardly from the trunk and having diameters substantially smaller than the trunk diameter. The surface area of the fibers is from about 4 to about 20 square meters per gram, and is about 30 to 60 times the equivalent surface area of fibers in the form of rod having the same diameter distribution as that of the trunks of the fibers herein, but with no fibrils. The fibers are oriented. Incorporation of the fibers results in substantial increase in stiffness and modulus. Loading of aramid fibers is typically about 0.2-20 phr. Vulcanized reinforced elastomers of this invention are especially suitable in pneumatic tires, and most particularly as carcass plies and reinforcing belts between the tread and carcass in radial tires.
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Brown Robert J.
Scriver Richard M.
Hoch Raymond
Kreek, Jr. Louis F.
The Goodyear Tire & Rubber Company
Young, Jr. Henry C.
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