Multi-Material Shoe Upper with Coating for Smooth Seam Finish

The shoe upper is divided into multiple regions (toe region, heel region, midfoot region) with each region using different materials or material combinations tailored to specific functional requirements. This segmentation allows optimal performance in each zone while maintaining overall upper integrity.

Different material properties are applied to different regions of the upper: thin, flexible materials in the toe region for ball control; thicker, more supportive materials in the heel region for stability; and varying degrees of permeability in different zones based on sweat management needs. This local quality approach ensures each region performs its specific function optimally.

The upper is segmented into zones with varying material thicknesses. The heel region uses thicker material for support, while the toe and midfoot regions use thinner material to minimize weight. This segmentation ensures support is provided only where structurally necessary.

Material thickness and density are locally optimized: thicker, more supportive materials are placed in the heel region where structural support is critical, while thinner, lighter materials are used in regions where support requirements are lower, thus minimizing overall weight while maintaining necessary support.

Multiple material zones are combined into a single integrated upper construction without traditional sewing connections. The different material regions are joined through bonding or integrated manufacturing processes that create a seamless transition, eliminating the uneven surfaces and weak points associated with stitched connections.

The sewing/stitching process is extracted and removed from the upper construction. Instead of joining regions through mechanical stitching that creates surface irregularities, the patent uses alternative joining methods or integrated construction techniques that maintain surface smoothness and eliminate needle holes that compromise waterproofness.

The coating application is segmented into different zones corresponding to different material regions. Each region receives appropriate coating treatment based on its specific requirements, allowing for optimized waterproofness without uniformly increasing weight or complexity across the entire upper.

Coating properties and thickness are locally optimized for different regions. Areas requiring higher waterproofness receive thicker or more robust coating, while regions where breathability or flexibility is prioritized receive thinner or more permeable coating layers. This local quality approach ensures waterproofness is provided where needed without unnecessarily increasing overall weight or manufacturing complexity.