Footwear including lightweight outsole structure and method of forming outsole structure
An article of footwear includes an outsole structure, where the outsole structure includes a plurality of layers with at least two rubber layers and at least one textile layer disposed between the two rubber layers. The outsole structure can further include a base structure including the plurality of layers and a plurality of ground engaging structures coupled with and extending from a surface of an exposed rubber layer of the base structure.
1. An article of footwear comprising:
an upper; and
a sole structure, the sole structure comprising:
an outsole structure comprising a plurality of layers, the plurality of layers including an upper rubber layer, a lower rubber layer and a textile layer disposed between the upper and lower rubber layers, wherein:
the textile layer is formed from a material selected from the group consisting of a polymer material, a cotton material and combinations thereof,
a plurality of ground-engaging structures extend from a lower surface of the lower rubber layer,
the lower rubber layer extends continuously with the textile layer such that no portion of the textile layer is exposed along a ground-engaging side of the outsole structure,
the upper rubber layer extends continuously with the textile layer such that no portion of the textile layer is exposed through the upper rubber layer, and
a combined thickness of the plurality of layers including the upper rubber layer, the lower rubber layer and the textile layer is no greater than about 2.0 mm; and
a midsole structure connected between the upper and the outsole structure such that the outsole structure is separated from the upper.
2. The article of footwear of claim 1 , wherein the textile layer comprises a material selected from the group consisting of a polyurethane, a polyester, a polyolefin, a polyamide, an elastomer, cotton, and any one or more combinations and/or copolymers thereof.
3. The article of footwear of claim 1 , wherein the textile layer comprises a woven or knitted fabric.
4. The article of footwear of claim 1 , wherein each of the upper and lower rubber layers has a Shore A durometer of greater than about 50.
5. The article of footwear of claim 1 , wherein each of the upper and lower rubber layers has a Shore A durometer of about 65 to about 70.
6. The article of footwear of claim 1 , further comprising a base structure including the plurality of layers and the plurality of ground engaging structures extending from the lower surface of the lower rubber layer.
7. The article of footwear of claim 6 , wherein the base structure has a maximum thickness no greater than about 2.0 mm.
8. The article of footwear of claim 6 , wherein the base structure has a maximum thickness no greater than about 1.2 mm.
9. The article of footwear of claim 6 , wherein each of the upper and lower rubber layers includes a portion having a thickness no greater than about 0.4 mm.
10. The article of footwear of claim 9 , wherein at least one rubber layer varies in thickness along one or more dimensions of the rubber layer.
11. The article of footwear of claim 6 , wherein the textile layer has a thickness no greater than about 0.2 mm.
12. The article of footwear of claim 6 , wherein at least one ground engaging element has a thickness that is greater than the thickness of the base structure.
13. The article of footwear of claim 12 , wherein at least one ground engaging element has a thickness of at least about 1.5 mm.
14. The article of footwear of claim 1 , further comprising an upper connected with a sole structure, and the sole structure comprises the outsole structure.
15. The article of footwear of claim 1 , wherein the midsole structure includes a layer that is coupled with a portion of the outsole structure at a surface that opposes the lower surface of the lower rubber layer.
16. The article of footwear of claim 15 , wherein the midsole structure layer includes at least one indentation dimensioned to receive and retain a portion of the outsole structure that includes the textile layer.
17. The article of footwear of claim 1 , wherein the textile layer is disposed adjacent a surface of the upper rubber layer or the lower rubber layer.
18. The article of footwear of claim 1 , wherein the textile layer is disposed adjacent a surface of each of the upper rubber layer and the lower rubber layer.
19. A method of forming the outsole structure for the article of footwear of claim 1 , the method comprising:
pressing a an upper surface of the textile layer against the upper rubber layer in a mold that secures the textile and upper rubber layers together;
pressing the lower rubber layer in a mold to form ground engaging structures extending from the lower surface of the lower rubber layer;
placing the textile and upper rubber layers secured together against the lower rubber layer such that a lower surface of the textile layer is adjacent an upper surface of the lower rubber layer; and
pressing the lower, textile and upper layers together in a mold to secure the textile layer to the lower rubber layer.
20. An article of footwear comprising:
an upper; and
a sole structure, the sole structure comprising:
an outsole structure comprising a plurality of layers, the plurality of layers including an upper rubber layer, a lower rubber layer and a textile layer disposed between and adjacent to each of the upper and lower rubber layers, wherein:
the upper and lower rubber layers are formed of the same rubber material,
the textile layer is formed from a material selected from the group consisting of a polymer material, a cotton material and combinations thereof,
a plurality of ground-engaging structures extend from a lower surface of the lower rubber layer,
the lower rubber layer extends continuously with the textile layer such that no portion of the textile layer is exposed along a ground-engaging side of the outsole structure,
an exterior surface of the lower rubber layer defines at least part of the ground-engaging side of the outsole structure, and
a combined thickness of the plurality of layers including the upper rubber layer, the lower rubber layer and the textile layer is no greater than about 2.0 mm; and
a midsole structure connected between the upper and the outsole structure such that the outsole structure is separated from the upper.