The Goodyear & Tire Rubber Company

Millhaven Fibers, Ltd.

Millhaven Fibres, Ltd.

Alfredo Guillermo Causa

Marc Borowczak

Christina H Obermaier

William Alexander

James Girvan Fraser

Lawson G Wideman

Robert Allen Losey

Glen Hargis

A pneumatic tire ( ) having a reinforcement package including a mid-ply belt having reinforcement at a 0&deg; angle with respect tothe equatorial plane (EP) of the tire shows improved handling and durability. The mid-ply belt comprises reinforcing cords or filaments ( ) that are discontinuous. The dicontinuous cords or filaments ( ) make possible the production of a uniform tire in most tire designs, and the reinforcement of the mid-ply belt provides a tire with improved durability and handling properties. A tire with superior properties was produced using reinforcing cords or filaments ( ) and ( ) which are made from polyethylene napthalate.

Reinforcement package for tires

This invention relates to a conjugated diene-based rubber composition reinforced with particulate alumina in combination with a non-silane coupling agent as tetrathiodipropionic acid and/or trithiodipropionic acid. The invention includes an article of manufacture, including a tire, having at least one component comprised of such rubber composition.

ALUMINA REINFORCED RUBBER COMPOSITION WHICH CONTAINS TETRATHIODIPROPIONIC AND/OR TRITHIODIPROPIONIC ACID COUPLING AGENT AND ARTICLE OF MANUFACTURE, INCLUDING A TIRE, HAVING AT LEAST ONE COMPONENT COMPRISED OF SUCH RUBBER COMPOSITION

Partially oriented yarns (POY), when processed into short fibers and used as a fiber reinforcement in an elastomer, have been found to demonstrate reduced crack propagation in the elastomer. POY reinforced elastomers can be used in tires to replace cord reinforced components, and for example, can be used in the tread base of a tire, obviating the need for an overlay ply. In one embodiment it has been found that the properties of a fiber reinforced elastomer can be optimized by using a mixture of partially oriented fibers and fibrillated pulp fibers, such as pulped high modulus rigid rod liquid crystalline fibers, as the fiber reinforcement.

Elastomers containing partially oriented reinforcing fibers, tires made

Springy fibers, when used as a fiber reinforcement in an elastomer, have been found to demonstrate reduced crack propagation in the elastomer. Springy fiber reinforced elastomers can be used in tires in various components.

Tires made using elastomers containing springy fibers

According to a preferred embodiment, polyethylene terephthalate polymer is prepared by a process including addition to the melt of 0.45 up to 0.9% by weight of 1,2-epoxy-3-phenoxypropane, and triphenylphosphite, as a stabilizer.

Treating polyethylene terephthalate with 1,2-epoxy-3-phenoxypropane and

In the preparation of a fiber-forming polyester, the number of free carboxyl end groups present in the polymer may be reduced by adding to the polymerized polyester a glycidyl ether which reacts with the carboxyl end groups present to form free hydroxyl end groups.

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Akron, OH, United States of America

Alfredo Guillermo Causa