Layered Vehicle Seat Structure for Strength and Easy Recycling
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Solution Overview
Problem
Conventional vehicle seat assemblies are not environmentally friendly and are difficult to disassemble for recycling, lacking structural soundness and comfort.
Innovation Solution
A vehicle seat assembly comprising a structural layer, a soy-based foam cushion layer, and a comfort pad, all securely covered with a trim material, designed to be easily separable for recycling, using materials like expanded polyolefin and soy-based polyurethane foam.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional base construction polymers are mixed and joined together, then structural strength is achieved, but the assembly becomes difficult to disassemble for recycling
Solution Approach 1:
The seat assembly is divided into distinct modular layers including a frame layer, cushion layer, and trim layer, each made from compatible polymers. These layers are joined through welding or adhesive bonding rather than permanent mixing, allowing the assembly to be disassembled and recycled while maintaining structural integrity during use.
Solution Approach 2:
The invention uses composite material construction with multiple polymer layers (frame polymer, cushion polymer, trim polymer) that are compatible and can be joined together. This composite structure provides the necessary strength while enabling disassembly for recycling, as each layer can be separated and processed independently.
2Strength
If conventional seat assemblies are constructed with mixed materials, then structural soundness is achieved, but environmental friendliness is compromised
Solution Approach 1:
Each layer of the seat assembly is made from a homogeneous polymer material (frame polymer, cushion polymer, trim polymer) that is compatible with adjacent layers. This homogeneity within layers, combined with compatibility between layers, enables the entire assembly to be recycled together or separated for recycling, reducing environmental harm while maintaining structural soundness.
Solution Approach 2:
The seat assembly is designed to facilitate discarding and recovering of materials. The modular layered structure with compatible polymers allows the entire assembly or individual layers to be easily separated, recovered, and recycled, transforming what would be waste into reusable materials and reducing environmental impact.
3Ease of operation
If conventional seat assemblies use traditional materials, then comfort is provided, but recyclability is reduced
Solution Approach 1:
The comfort function is segmented into the cushion layer made from cushion polymer, which is a distinct module from the frame and trim layers. This segmentation allows the cushion layer to be optimized for comfort while being easily separable for recycling, resolving the contradiction between comfort and recyclability.
Solution Approach 2:
The use of composite materials with compatible polymers allows each layer to be optimized for its specific function (structural support, comfort, durability) while maintaining the ability to recycle the entire assembly. The composite structure enables functional optimization without sacrificing recyclability.
Data Source
AI summary
The present invention relates to an environmentally friendly layered vehicle seat assembly and a method of making the same. In at least one embodiment, the vehicle seat assembly comprises a cushion composite comprising a structural layer and a cushion layer adjacent to the structural layer, and a trim material secured over the cushion composite.