Block Outsole Mechanical Interlocking for Waterproof Durability
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Solution Overview
Problem
Conventional outsoles bonded to shoes with adhesives face hydrolysis in wet conditions, leading to reduced adhesion and potential detachment, and are affected by shrinkage variations in resin materials, compromising durability and waterproofness.
Innovation Solution
A block type outsole design featuring a fixing portion, protrusion portion, and connecting portion that fits into a base portion without adhesive, ensuring secure attachment and resistance to hydrolysis, with anti-slip features like intaglio patterns and pins for enhanced traction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive is used to bond outsole to shoe, then outsole can be attached to shoe, but adhesive undergoes hydrolysis in wet places causing reduced adhesion and detachment
Solution Approach 1:
The patent removes the adhesive component entirely from the outsole attachment system. Instead of using adhesive bonding, the outsole utilizes a mechanical interlocking structure with insertion portions that fit into corresponding holes in the shoe, eliminating the hydrolysis problem associated with adhesives in wet environments.
Solution Approach 2:
The patent replaces the chemical bonding mechanism (adhesive) with a mechanical interlocking system. The outsole includes insertion portions that physically fit into holes formed in the shoe's bottom portion, creating a secure mechanical connection that does not rely on chemical adhesion susceptible to hydrolysis.
2Reliability
If adhesive is used to bond outsole to shoe, then outsole can be attached to shoe, but variations in shrinkage between materials cause internal stress and reduced durability
Solution Approach 1:
The patent eliminates the adhesive layer that is subject to shrinkage variations. By removing the adhesive and using direct mechanical interlocking between the outsole and shoe materials, the system avoids the internal stresses caused by differential shrinkage between adhesive and substrate materials.
Solution Approach 2:
The outsole is divided into multiple portions including insertion portions that can independently fit into holes in the shoe. This segmentation allows each portion to accommodate material variations and shrinkage independently, reducing overall internal stress in the assembly.
3Reliability
If adhesive is used to bond outsole to shoe, then outsole can be attached to shoe, but adhesion is reduced in wet conditions leading to detachment
Solution Approach 1:
The patent replaces chemical adhesion with mechanical interlocking. The insertion portions of the outsole fit into holes in the shoe, creating a physical connection that maintains attachment strength regardless of wet conditions, unlike adhesive bonds that degrade when exposed to moisture.
Data Source
AI summary
Provided is a block type outsole and a shoe manufacturing method including same that can firmly fix the block type outsole to the base portion without an adhesive, thereby providing the shoe with excellent durability, and undergo no hydrolyzation of an adhesive even in wet places and cause no concern of being detached from the shoe due to reduced adhesion, thereby providing the shoe with excellent waterproofness. In addition, the block type outsole and shoe manufacturing method including same can manufacture a shoe including a block type outsole having abrasion resistance and anti-slip function only by using a simple process, thereby showing excellent process efficiency.