Recyclable Brushware Using Homogeneous Polyamide Components
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Solution Overview
Problem
Current bristle products, such as toothbrushes, face challenges in recycling due to the use of multiple materials, which complicates separation and reduces material quality in recycled products.
Innovation Solution
The development of bristle products where all components, including monofilaments or bristles, heads, handles, and necks, are made from polymers of the same class, such as polyamide, derived from specific monomers like ω-aminododecanoic acid and laurolactam.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple materials are used in bristle products to ensure durability and functionality, then the performance and resilience of the product are improved, but the complexity of recycling and separation increases significantly
Solution Approach 1:
The patent merges multiple material functions into a single polyamide material. The bristle, head, and handle are all made from the same polyamide polymer class, eliminating the need for separation during recycling while maintaining the durability and performance characteristics that would otherwise require multiple materials.
Solution Approach 2:
The patent applies homogeneity by using materials of the same polymer class (polyamide) for all components. This ensures uniform chemical properties throughout the product, making recycling straightforward while still achieving the desired mechanical properties through appropriate polyamide formulation and processing.
2Adaptability or versatility
If multiple types of plastic are used in the bristle product, then the functional requirements are met, but the separation process becomes economically unfeasible and material quality deteriorates
Solution Approach 1:
The polyamide material serves multiple functions across different product components (bristle, head, handle). This universal material approach meets diverse functional requirements through material formulation and design rather than using different plastics, thereby preventing material quality degradation during recycling.
3Strength
If different polymers are combined in the bristle product, then the desired mechanical properties and resilience are achieved, but the chemical incompatibility reduces adhesion and requires compatibility enhancers
Solution Approach 1:
By using the same polymer class (polyamide) for all components, the patent eliminates chemical incompatibility issues. The homogeneous material composition ensures good adhesion between components without requiring compatibility enhancers, while mechanical properties are optimized through polyamide formulation.
Data Source
AI summary
The invention relates to a product with bristles, having the components of monofilaments or bristles and at least one head, handle, and/or neck. The product is characterized in that the components have polymers of the same polymer class, selected from polymers and/or copolymers, or consists thereof, and the polymer class is selected from polyamides or polyesters.