Pneumatic tire with improved snow and ice traction

Details Pneumatic tire with improved snow and ice traction Pneumatic tire with improved snow and ice traction

1995-04-28

1998-11-24

Knable, Geoffrey L.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

B60C 1100

Patent

active

058401377

ABSTRACT:
A composite tread structure (22) comprises a low modulus at -20.degree. C. rubber outer layer (23) and a high modulus at -20.degree. C. rubber inner layer (24), thicker than the outer layer. The outer layer is preferably made from a rubber having a glass transition temperature lower than the glass transition temperature of the rubber comprising the inner layer. Such a tire generally improves snow and ice handling and maintains good wet and dry traction. A pneumatic tire (10) having improved snow and ice traction employs a composite tread (22) comprising a low modulus at -20.degree. C. rubber outer layer component (23) and a high modulus at -20.degree. C. rubber inner layer rubber component (24), thicker than the outer layer component. Finally, a method for improving the snow and ice traction of pneumatic tires comprises the step of applying to the tire carcass prior to curing, a composite tread comprising a low modulus at -20.degree. C. rubber outer layer component and a high modulus at -20.degree. C. rubber inner layer component, thicker than the outer layer component.

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