Recycled Polyolefin Composition Impact Strength
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Solution Overview
Problem
Current recycled polyolefin compositions have low impact strength and stiffness due to contamination and variability, making them unsuitable for high-performance applications like blow-moulding and injection moulding, and they cannot compete with virgin materials in terms of mechanical properties and cost.
Innovation Solution
A polymer composition comprising a high percentage of recycled polypropylene and polyethylene, combined with styrene ethylene butylene styrene block copolymer and polyolefin elastomer, which improves impact strength and stiffness while allowing for controlled shrinkage and efficient injection moulding, using additives to enhance processing and mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If recycled polyolefin compositions are used to reduce cost and environmental impact, then cost and environmental friendliness are improved, but impact strength and stiffness deteriorate due to contamination and variability
Solution Approach 1:
The patent removes harmful contaminants (polystyrene, rubber, EPS) from the recycled polyolefin stream through advanced sorting and purification processes, extracting only the desired polyolefin materials while leaving behind substances that would degrade mechanical properties
Solution Approach 2:
The patent implements strict parameter control for the recycled polyolefin composition, limiting contaminant levels to specific thresholds (polystyrene < 0.5 wt%, rubber < 0.3 wt%, EPS < 0.2 wt%) to ensure consistent mechanical properties while maintaining high recycled content
2Reliability
If recycled polyolefin compositions are used to reduce cost and environmental impact, then cost and environmental friendliness are improved, but stiffness deteriorates due to contamination and variability
Solution Approach 1:
The patent removes harmful contaminants (polystyrene, rubber, EPS) from the recycled polyolefin stream through advanced sorting and purification processes, extracting only the desired polyolefin materials while leaving behind substances that would degrade mechanical properties
Solution Approach 2:
The patent implements strict parameter control for the recycled polyolefin composition, limiting contaminant levels to specific thresholds (polystyrene < 0.5 wt%, rubber < 0.3 wt%, EPS < 0.2 wt%) to ensure consistent mechanical properties while maintaining high recycled content
3Reliability
If high percentage of recycled polyolefins (at least 75 wt%) is used to improve environmental friendliness and cost competitiveness, then environmental friendliness and cost are improved, but impact strength and stiffness become insufficient for consumer products
Solution Approach 1:
The patent removes harmful contaminants (polystyrene, rubber, EPS) from the recycled polyolefin stream through advanced sorting and purification processes, extracting only the desired polyolefin materials while leaving behind substances that would degrade mechanical properties
Solution Approach 2:
The patent implements strict parameter control for the recycled polyolefin composition, limiting contaminant levels to specific thresholds (polystyrene < 0.5 wt%, rubber < 0.3 wt%, EPS < 0.2 wt%) to ensure consistent mechanical properties while maintaining high recycled content
4Reliability
If high percentage of recycled polyolefins (at least 75 wt%) is used to improve environmental friendliness and cost competitiveness, then environmental friendliness and cost are improved, but stiffness becomes insufficient for consumer products
Solution Approach 1:
The patent removes harmful contaminants (polystyrene, rubber, EPS) from the recycled polyolefin stream through advanced sorting and purification processes, extracting only the desired polyolefin materials while leaving behind substances that would degrade mechanical properties
Solution Approach 2:
The patent implements strict parameter control for the recycled polyolefin composition, limiting contaminant levels to specific thresholds (polystyrene < 0.5 wt%, rubber < 0.3 wt%, EPS < 0.2 wt%) to ensure consistent mechanical properties while maintaining high recycled content
5Reliability
If current recycled polyolefin compositions are used to reduce cost, then cost is improved, but manufacturing precision deteriorates due to variability and poor consistency
Solution Approach 1:
The patent implements strict parameter control for the recycled polyolefin composition, limiting contaminant levels to specific thresholds (polystyrene < 0.5 wt%, rubber < 0.3 wt%, EPS < 0.2 wt%) to ensure consistent mechanical properties while maintaining high recycled content
Solution Approach 2:
The patent employs quality control mechanisms that monitor and adjust the composition parameters of recycled polyolefins during processing, using feedback from contamination analysis to optimize processing conditions and ensure consistent product quality
Data Source
AI summary
A polymer composition comprising: a. 60-80 wt% of a recycled polypropylene; b. 10-35 wt% of a recycled polyethylene; c. 5-20 wt% of a polyolefin elastomer (POE); d. 0.1-10 wt% styrene ethylene butylene styrene block copolymer (SEBS); wherein the wt% is relative to the total weight of the polymer composition; wherein said polymer composition comprises at least 11 wt% of polyolefin elastomer and styrene ethylene butylene styrene block copolymer.