Composite shoe upper and method of making same
A bonded mesh composite panel of an upper includes a substrate layer formed from a substrate material, a mesh material layer and one or more skin material layers. The mesh composite can be fabricated by first arranging panels of substrate, mesh and skin layer material into an assembly corresponding to the locations of those panels in a completed upper. The assembly may include separate layers of hot melt bonding material interposed between the substrate, mesh and skin layers. The assembly is pressed at an elevated temperature so as to melt the bonding material and the skin layers and bond the elements together. Before the pressed assembly completely cools, it is then pressed a second time in an unheated press. A heat-conductive compressible pad can be used in the pressing process to create a surface effect in the skin layers that reveals a patterns of an underlying mesh layer.
1. A method comprising:
positioning an upper pan of an assembly jig over a lower pan of the assembly jig, the lower pan having a plurality of locating pins extending away from the lower pan and the upper pan having a surface with a plurality of holes formed therein, the holes having locations corresponding to locations of the locating pins, each locating pin protruding through its corresponding hole after completion of positioning the upper pan;
positioning a plurality of panels into an assembly in which the locations of the panels in the assembly correspond to locations to be occupied by the panels in a completed article, wherein each of said panel locations in the assembly is identified by at least a portion of the locating pins;
placing a compressible pad over the panel assembly;
removing the upper pan from the lower pan while the compressible pad is in place over the panel assembly; and
compressing the upper pan, the panel assembly and the compressible pad at a first temperature in a first pressing operation.
2. The method of claim 1 , wherein the locations of the panels in the assembly correspond to locations to be occupied by the panels in an upper in a completed article of footwear.
3. The method of claim 2 , wherein positioning the plurality of panels into the assembly includes placing openings in the panels over the locating pins.
4. The method of claim 2 , wherein the first temperature is at or above a melting point of a material from which at least one of the panels is formed.
5. The method of claim 4 , further comprising compressing the upper pan, the panel assembly and a compressible pad at a second temperature in a second pressing operation following the first pressing operation, wherein the second temperature is substantially below the first temperature.
6. The method of claim 5 , wherein the second temperature is between 20° C. and 30° C.
7. The method of claim 2 , wherein at least one of the panels comprises a synthetic leather, wherein at least another of the panels comprises a mesh material, and wherein at least another of the panels comprises at least one of thermoplastic polyurethane and polyurethane.
8. The method of claim 7 , wherein the mesh material comprises a single layer warped knit with an open structure.
9. The method of claim 2 , wherein the compressible pad comprises a silicone pad.