Pneumatic tire with built-in sealant layer composite
AssigneeThe Goodyear Tire & Rubber Company
InventorRamendra Nath Majumdar
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Abstract
The present invention is directed to a pneumatic tire with a built-in sealant layer composite where the composite is composed of polyurethane with a thin layer of at least one of particulate filler, short fibers and non-woven microfiber. In one embodiment, said polyurethane sealant composite is comprised of a plurality of circumferentially extending layers comprised of a first polyurethane sealant layer, a second polyurethane sealant layer and a thin layer of polyurethane sealant-containing non-woven microfiber positioned between said first and second polyurethane layers. In another embodiment, said polyurethane sealant is a composite comprised of a polyurethane sealant layer containing a thin layer of at least one of particulate filler and short fibers.
Claims20
A pneumatic tire comprised of an outer circumferential rubber tread, a supporting carcass containing an innermost carcass barrier rubber layer, and a rubber innerliner disposed inwardly from said supporting carcass and thereby inwardly from said carcass barrier rubber layer;
- wherein said tire has a built-in composite of polyurethane based sealant layer positioned between and adjacent to said carcass barrier rubber layer of said supporting carcass and said rubber innerliner;
- wherein said composite of polyurethane based sealant layer is a multilayered composite extending in a circumferential direction comprised of a thick polyurethane layer and a thin polyurethane layer with a thin intermediate layer positioned between said thick and thin polyurethane layers comprised of at least one of:
- (A) non-woven microfiber layer containing said polyurethane,
- (B) particulate pigment,
- (C) discrete short fibers, and
- (D) cured rubber particles.
Dependencies are inferred from the claim text.