Thermoplastic Elastomer Composition with Crosslinked Rubber Powder
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Solution Overview
Problem
There is a need for a composition that offers good springback, low density, abrasion resistance, antislip properties, and tensile strength, while also being recyclable.
Innovation Solution
A composition comprising 20% to 90% by weight of thermoplastic elastomer (TPE) and 10% to 80% by weight of crosslinked rubber powder, with specific surface area and particle size characteristics, along with optional additives and compatibilizers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If rubber powder with high specific surface area is used, then abrasion resistance is improved, but density increases
Solution Approach 1:
The patent optimizes the specific surface area parameter of rubber powder to a specific range (0.08-100 m2/g) to achieve the desired balance between abrasion resistance and density. This parameter change allows the material to maintain low density while providing sufficient surface area for abrasion resistance.
Solution Approach 2:
The invention creates a composite material system combining thermoplastic elastomer with crosslinked rubber powder of controlled specific surface area. This composite structure enables the material to simultaneously achieve low density and good abrasion resistance by leveraging the properties of both components in an optimized ratio.
2Stability of the object's composition
If crosslinked rubber powder is used to improve springback, then elastic recovery is improved, but manufacturing complexity increases
Solution Approach 1:
The crosslinking of rubber powder is performed in advance during the rubber processing stage, before incorporation into the final product. This preliminary action ensures that the springback property is pre-established without adding complexity to the subsequent manufacturing steps.
Solution Approach 2:
The invention controls the crosslinking degree and rubber powder characteristics (specific surface area, particle size distribution) as key parameters to achieve optimal springback. By optimizing these parameters, the material achieves good elastic recovery without requiring complex manufacturing processes.
3Ease of repair
If thermoplastic elastomer is used for recyclability, then ease of recycling is improved, but tensile strength may be reduced
Solution Approach 1:
The patent creates a composite material where thermoplastic elastomer is combined with crosslinked rubber powder in optimized ratios. This composite structure allows the material to maintain good tensile strength while preserving the recyclability advantage of the thermoplastic elastomer component.
Solution Approach 2:
The invention optimizes the composition parameters (weight ratios of TPE to rubber powder, specific surface area of powder, crosslinking degree) to achieve the desired balance between tensile strength and recyclability. These parameter optimizations ensure that the material remains strong while being easily recyclable through melting and reprocessing.
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 composition achieves good elastic recovery, high elongation at break, effective adhesion to wet surfaces, and recyclability due to its meltable nature, while maintaining desired mechanical properties.
Implementation Method 1
The composition achieves good elastic recovery, high elongation at break
Implementation Method 2
recyclability due to its meltable nature
Data Source
AI summary
The invention relates to a composition comprising, relative to the total weight of the composition:from 20% to 90%, preferably from 40% to 70%, by weight of at least one thermoplastic elastomer (TPE), preferably an elastomeric thermoplastic copolymer, andfrom 10% to 80%, preferably from 30% to 60%, by weight of at least one crosslinked rubber powder, the crosslinked rubber powder having a specific surface area of between 0.08 m2/g and 100 m2/g, preferably between 0.1 and 80 m2/g, more preferentially between 0.1 and 50 m2/g,from 0 to 5%, preferably from 0.1% to 4% and notably from 1% to 2% of additives;from 0 to 40%, preferably from 5% to 20% and notably from 10% to 15% of compatibilizers.