Automotive Thermoplastic Layer Composition for Recyclable Grain Surfaces
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing automotive parts with viscoelastic layers, particularly those made from polyolefins or PVC, are difficult to recycle due to mixed material compositions, leading to low-quality recycling and increased landfill waste, and often require inert fillers that compromise performance.
Innovation Solution
A versatile layer comprising a thermoplastic polymer-based powder with a melting temperature above the matrix, maintaining discrete particle structure, is used as a filler in a matrix, allowing for easy recycling and improved abrasion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If inert fillers like calcium carbonate are used to reduce cost or increase weight, then the layer achieves cost reduction or increased weight, but the quality of the layer is reduced so much that it is rendered of no value for recycling streams
Solution Approach 1:
The invention changes the parameter of the filler from inert materials (calcium carbonate) to thermoplastic polymer-based powder with specific melting temperature characteristics. This parameter change allows the filler to maintain discrete particle structure during processing while enabling the layer to be recycled, thus improving recycling quality while still achieving cost reduction or weight increase.
Solution Approach 2:
The invention creates a composite material system where thermoplastic polymer powder is combined with a matrix material. The composite structure with discrete powder particles embedded in the matrix provides both the desired physical properties (cost reduction, weight increase) and maintains recyclability, resolving the contradiction between quantity and quality.
2Reliability
If thermoplastic elastomeric layers are combined with felt based materials, films, foils or foams to create multilayer multi-material automotive parts, then the functional performance is improved, but the parts become difficult to recycle or to take apart into the various materials used
Solution Approach 1:
The invention uses thermoplastic polymer-based powder as filler that is compatible with the matrix material, creating a more homogeneous material system. This homogeneity allows the layer to be processed and recycled together with the matrix, eliminating the need to separate multiple dissimilar materials while maintaining functional performance.
Solution Approach 2:
The invention changes the filler material parameters to use thermoplastic polymer powder with melting temperature at least 20°C above the matrix, which allows the filler to maintain discrete structure during processing but enables the entire layer to be recycled as a unified material stream, improving ease of manufacture for recycling.
3Stability of the object's composition
If the powder filler maintains discrete particle structure within the matrix, then the powder maintains its original character and does not melt and mix with the matrix, but achieving good bonding of the powder within the matrix requires light softening and tackiness
Solution Approach 1:
The invention utilizes phase transition principles by selecting powder with melting temperature at least 20°C above the matrix. During processing, the matrix softens while the powder remains discrete, but sufficient bonding occurs through the matrix's tackiness. The powder maintains its discrete structure in the final product while achieving adequate bonding, resolving the contradiction between stability and strength.
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 layer achieves enhanced scratch resistance, reduced shine, and improved recyclability by maintaining a grain effect, while being suitable for both surface and barrier applications, and can be produced from waste materials.
Implementation Method 1
a filler comprising a thermoplastic polymer-based powder with a melting temperature at least 20°C above the melting temperature of the matrix
Implementation Method 2
the powder should maintain its original character and not melt and mix with the matrix as a polymer. The powder should maintain substantially a discrete particles structure within the matrix.
Implementation Method 3
a light softening and tackiness may occur with the polymer-based powder used as a filler and is even preferable to create a good bonding of the powder within the matrix
Implementation Method 4
As the polymer-based powder has a melting temperature above the melting temperature of the matrix the powder particles are not melting during the thermal compounding of the versatile layer, so they stay substantially intact.
Implementation Method 5
using a polymer-based powder in the matrix has also a positive impact on the processing of the material, for instance the material tends to stick less to the surfaces of the equipment like for instance the calander.
Implementation Method 6
by maintaining this grain effect at least partially on the surface, not only a more mat surface was achieved which reduces shine, also the scratch and abrasion resistance of the surface was further improved.
Data Source
Figure 1
AI summary
Versatile layer for an automotive part comprising a matrix and a filler characterized in that the filler is a thermoplastic filler consisting of a thermoplastic polymer-based powder with a melting temperature at least 20°C above the melting temperature of the matrix.