COMPOSITE TREAD WITH STIFFNESS GRADIENT AND METHOD OF MAKING

A method for forming a composite tread (250) for a tire is disclosed. The method comprises the steps of: forming a coextruded strip (210) of a first and second rubber compound, wherein the first rubber compound is a tread rubber compound and the second rubber compound is different from the first rub...

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Bibliographische Detailangaben
Hauptverfasser:	ROGENSKI, Elizabeth Amelia, BALDAN, Adam Mark, CHEN, Hongbing, DYRLUND, Christopher David
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS PERFORMING OPERATIONS PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A method for forming a composite tread (250) for a tire is disclosed. The method comprises the steps of: forming a coextruded strip (210) of a first and second rubber compound, wherein the first rubber compound is a tread rubber compound and the second rubber compound is different from the first rubber compound; and forming the tread (250) from winding the coextruded strip (210) onto a tire building drum (18) or a green tire carcass while varying the ratio of the first compound to the second compound in the coextruded strip (210). Also, a tire having a tread (250) is disclosed. The tread (250) is formed from a preferably continuous spiral winding of a coextruded dual layer strip (210) of a first and second rubber compound, wherein the second rubber compound is different from the first rubber compound, and wherein a portion of the tread (250) has a gradient of the first rubber compound to the second rubber compound.