Hot-Pressed Waterproof Shoe Using Melted Adhesive
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Solution Overview
Problem
Conventional rubber footwear is heavy due to decorative pieces and ineffective in resisting water, particularly at the sewing line between the vamp and shaft sections.
Innovation Solution
A method involving cutting waterproof leather coated with hot-melt adhesive into specific plates, arranging and hot-pressing them to form a lightweight, water-resistant vamp and shaft sections, and covering the sewing line with a heel water-resistant plate to create a waterproof shoe or boot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If decorative pieces are attached to the boot from vamp section to shaft section by sewing, then the boot achieves water resistance, but the footwear becomes heavy
Solution Approach 1:
The patent extracts the water resistance function from the decorative pieces and relocates it to the vamp and shaft sections themselves. The vamp and shaft sections are designed with water-resistant properties inherently, eliminating the need for separate decorative pieces that provide water resistance, thereby reducing weight while maintaining waterproofness.
Solution Approach 2:
The patent merges the water resistance function with the structural components (vamp and shaft sections). Instead of having separate decorative pieces attached by sewing, the water-resistant property is integrated into the vamp and shaft sections themselves, combining structural and waterproofing functions into a single integrated design.
2Reliability
If decorative pieces are attached to the boot, then the boot achieves water resistance, but the footwear becomes heavy due to thickness
Solution Approach 1:
The patent removes the unnecessary thickness of separate decorative pieces by extracting the water resistance function and integrating it directly into the vamp and shaft sections. This eliminates redundant layers while maintaining the waterproofing capability.
Solution Approach 2:
The patent combines the water-resistant layer with the vamp and shaft sections, merging multiple functions (structural support and waterproofing) into a single integrated component, thereby reducing overall thickness compared to having separate decorative pieces.
3Strength
If sewing is used to attach heel section, then the boot achieves structural integrity, but the sewing line becomes a water leakage point
Solution Approach 1:
The patent replaces the mechanical sewing process with a hot-pressing process to attach the heel section. The hot-pressing process uses heat and pressure to bond the heel section to the vamp and shaft sections, eliminating the sewing lines that create water leakage points while maintaining structural integrity.
Solution Approach 2:
The patent changes the attachment method from mechanical (sewing) to thermal (hot-pressing). By using heat and pressure parameters during the hot-pressing process, the heel section is bonded to the vamp and shaft sections, creating a water-resistant joint without the needle holes and sewing lines that compromise waterproofness.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method results in a lightweight, waterproof shoe or boot that significantly reduces weight and enhances water resistance by eliminating the need for sewing and using a hot-pressed, water-resistant construction.
Implementation Method 1
the hot-melt adhesive layer on the back sides of the vamp water-resistant plate and the vamp decorative plates is heated and melted to combine with the vamp lining plate as a unitary combination
Implementation Method 2
the hot-melt adhesive layer on the back side of the shaft water-resistant plate is heated and melted to combine with the shaft lining plate as a unitary combination
Implementation Method 3
a portion of the hot-melt adhesive that is located along a peripheral edge of the shaft arc opening of the shaft section is stacked on a peripheral edge of the first insertion opening of the vamp water-resistant plate of the vamp section formed in the previous steps and is subjected to hot pressing such that the portion of the shaft hot-melt adhesive that is located along the peripheral edge of the shaft arc opening of the shaft section is heated and melted to combine the shaft section and the vamp section to each other
Implementation Method 4
the hot-melt adhesive on the back side of the heel water-resistant plate is heated and melted and combines with the vamp section and the shaft section to form a unitary combination
Data Source
AI summary
A method for manufacturing a light-weight waterproof shoe/boot includes steps of cutting waterproof leather, arranging and stacking vamp section, forming through hot pressing, sewing heel section, hot-pressing heel section, combining midsole, and injecting sole to accompany fabrication of a waterproof shoe/boot, in which fabrication of a vamp section and a shaft section is accomplished through hot pressing the waterproof leather that is coated with a hot-melt adhesive; a sewing line of a heel section is covered by a heel water-resistant plate that is attached thereto through hot pressing to provide an effect of waterproofness; and a sewing line between a midsole and the vamp section is covered by an upper rim of a sole to achieve an effect of waterproofness. The vamp section and the shaft section are made with the waterproof leather that is light and thin so that the weight of the waterproof shoe/boot is greatly reduced.