Polyester Shoe Sole Recycling Through Alcoholysis And Polymerization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current shoes are difficult to recycle and pose environmental hazards due to the use of materials like nylon, polyester, and polyurethane that are not easily separated or reused.
Innovation Solution
A manufacturing method involving an alcoholysis reaction and polymerization process to convert shoe components into a thermoplastic polyester elastomer, utilizing recycled materials such as PET and polyester yarn, enabling the entire shoe to be recycled and reused.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional shoe materials (nylon, polyester, polyurethane) are used, then the shoe has good mechanical properties and durability, but the shoe cannot be easily separated or recycled
Solution Approach 1:
The patent applies parameter changes by transforming the chemical structure of polyester materials through alcoholysis reaction, converting them into recyclable thermoplastic polyester elastomers while maintaining mechanical properties. This chemical parameter transformation enables the material to be both durable and recyclable
Solution Approach 2:
The patent uses composite materials by creating a thermoplastic polyester elastomer through polymerization of polyester oligomers with polyalkylene glycol. This composite material combines the durability of polyester with the recyclability of thermoplastic materials, resolving the contradiction between strength and recyclability
2Adaptability or versatility
If multiple different materials are used in shoe components, then the shoe achieves diverse functional properties, but the materials cannot be easily separated
Solution Approach 1:
The patent applies universality by making all shoe components (midsole, outsole, upper, tongue, insole, adhesive) from polyester materials that can undergo alcoholysis reaction. This multi-functional approach allows different components to have different properties while maintaining universal recyclability through the same chemical process
Solution Approach 2:
The patent uses homogeneity by converting all diverse shoe materials into a统一的 thermoplastic polyester elastomer through alcoholysis and polymerization reactions. This homogeneous material state enables easy separation and recycling while still allowing functional differentiation through material composition adjustments
3Ease of manufacture
If non-recyclable materials are used in shoe production, then the manufacturing process is simple and cost-effective, but the shoes cause environmental harm
Solution Approach 1:
The patent applies parameter changes by modifying the chemical parameters of polyester materials through controlled alcoholysis and polymerization reactions. These parameter changes transform non-recyclable materials into recyclable thermoplastic polyester elastomers, reducing environmental harm while maintaining manufacturing feasibility
Solution Approach 2:
The patent implements discarding and recovering by enabling the entire shoe to be discarded as a single recyclable material through alcoholysis reaction. The thermoplastic polyester elastomer can be broken down and recovered to produce new materials, eliminating environmental harm while keeping the process cost-effective
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 allows for the recycling and reuse of shoe components, reducing environmental impact by utilizing recyclable polyester materials and producing a thermoplastic polyester elastomer suitable for forming soles.
Implementation Method 1
performing an alcoholysis reaction of the shoe with a diol to form a polyester oligomer
Implementation Method 2
performing a polymerization reaction of the polyester oligomer and a polyalkylene glycol to obtain a thermoplastic polyester elastomer
Data Source
AI summary
A sole and a manufacturing method of a polymer material are provided. The manufacturing method of a polymer material includes: providing a shoe; performing an alcoholysis reaction of the shoe with a diol to form a polyester oligomer; and performing a polymerization reaction of the polyester oligomer and a polyalkylene glycol to obtain a thermoplastic polyester elastomer. The shoe includes a midsole, an outsole, an upper, a tongue, an insole and an adhesive. A material of the midsole, the outsole, the upper, the tongue, the insole and the adhesive are a polyester material.