Recycled Battery Separator HDPE Polymer Composition for Large Containers
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Solution Overview
Problem
The recycling of waste secondary battery separators is challenging due to their insufficient physical properties and processability, which limits their suitability for manufacturing large containers with excellent mechanical properties and environmental stress cracking resistance.
Innovation Solution
A polymer composition comprising high-density polyethylene recovered from secondary battery separators, blended with a second high-density polyethylene having specific density and melt flow index ranges, to enhance processability and mechanical properties such as flexural modulus, impact strength, and environmental stress cracking resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If polyethylene is recovered from waste secondary battery separators, then environmental friendliness and resource recycling are improved, but processability and mechanical properties (flexural modulus, environmental stress cracking resistance) deteriorate
Solution Approach 1:
The patent applies parameter changes by controlling the melt flow index of the recovered polyethylene within a specific range (0.1 to 3.0 g/10 min) and adjusting the density (0.920 to 0.990 g/cm³) to optimize both processability and mechanical properties. This parameter optimization enables the recycled polyethylene to be molded efficiently while maintaining excellent environmental stress cracking resistance and flexural modulus.
Solution Approach 2:
The patent creates a composite material system by combining recovered polyethylene from waste separators with other polyethylene components having complementary properties. This composite approach allows the final molded product to achieve excellent processability, mechanical strength, and environmental stress cracking resistance that cannot be obtained with the recovered polyethylene alone.
2Loss of substance
If polyethylene from waste separators is used for large container manufacturing, then resource recycling is improved, but mechanical properties (flexural modulus, environmental stress cracking resistance) are insufficient
Solution Approach 1:
The patent optimizes the physical parameters of the recovered polyethylene, specifically controlling the melt flow index (0.1 to 3.0 g/10 min) and density (0.920 to 0.990 g/cm³), to enhance the flexural modulus and environmental stress cracking resistance. This parameter control enables the recycled material to meet the mechanical property requirements for large container applications.
Solution Approach 2:
The patent develops a composite polymer composition that combines recovered polyethylene with additional polyethylene components having complementary mechanical properties. This composite formulation significantly improves the flexural modulus and environmental stress cracking resistance, making the material suitable for large containers that require high mechanical strength and durability.
3Loss of substance
If polyethylene from waste separators is used for large container manufacturing, then resource recycling is improved, but processability deteriorates
Solution Approach 1:
The patent optimizes the melt flow index of the recovered polyethylene to a specific range (0.1 to 3.0 g/10 min), which directly improves processability and molding efficiency. This parameter adjustment allows the material to flow properly during injection molding or extrusion processes, enabling efficient manufacturing of large containers with reduced defects and improved workability.
4Loss of substance
If polyethylene from waste separators is used for large container manufacturing, then resource recycling is improved, but environmental stress cracking resistance is poor
Solution Approach 1:
The patent controls the density and molecular weight distribution of the recovered polyethylene within specific ranges to enhance environmental stress cracking resistance. By optimizing these parameters, the material develops improved resistance to environmental stress cracking, ensuring long-term reliability and durability of the molded large containers in external environments.
Solution Approach 2:
The patent creates a composite polymer composition that combines recovered polyethylene with additional polyethylene components having superior environmental stress cracking resistance. This composite formulation significantly enhances the overall environmental stress cracking resistance of the material, ensuring the molded containers can withstand long-term exposure to external environmental conditions.
Data Source
AI summary
The present disclosure may provide a polymer composition for manufacturing a large container that comprises high-density polyethylene recovered from a secondary battery separator and has excellent mechanical properties. Specifically, a polymer composition having excellent processability may be prepared by recycling a secondary battery separator, and an eco-friendly large container having excellent mechanical properties such as a flexural modulus, an elongation, and an impact strength in a wide temperature range, and having an excellent environmental stress cracking resistance may be manufactured by molding the polymer composition.