Recycled Polyolefin Resin Blend After Separator Coating Removal
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Solution Overview
Problem
The recycling of secondary battery separators is hindered by the inorganic particle coating layer, which complicates the detachment process and affects the physical properties of the recycled polyolefin resin, leading to issues in reusing these materials for new battery production and other products.
Innovation Solution
A mixed recycled polyolefin resin composition is developed, comprising a new polyolefin resin and a recycled polyolefin resin recovered from waste separators, with the inorganic particle coating layer detached to improve processability and physical properties, allowing for the creation of products with enhanced mechanical and chemical resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inorganic particle coating layer is retained on the waste separator, then the separator maintains its original protective function, but the detachment process becomes complicated and the physical properties of recycled resin deteriorate
Solution Approach 1:
The patent applies preliminary action by performing detachment of the inorganic particle coating layer before recycling the polyolefin resin. The coating layer is removed in advance through mechanical or chemical methods, allowing the underlying polyolefin resin to be recovered in a clean state that is suitable for reprocessing into high-quality recycled resin products.
Solution Approach 2:
The patent applies the extraction principle by selectively removing the inorganic particle coating layer from the waste separator. This separation process extracts the coating layer (which contains inorganic particles like alumina or silica) from the polyolefin resin matrix, enabling the resin to be recycled independently without contamination from the coating materials.
2Strength
If the inorganic particle coating layer is detached from the waste separator, then the physical properties of recycled polyolefin resin are improved, but the detachment process becomes more complex
Solution Approach 1:
The patent applies mechanics substitution by replacing complex mechanical detachment methods with chemical or thermal treatment processes. For example, using solvents to dissolve binding agents or applying controlled heat to facilitate coating layer removal, thereby achieving effective detachment with simpler and more efficient processes.
Solution Approach 2:
The patent applies parameter changes by modifying process conditions such as temperature, pH, or solvent composition to optimize the detachment of the inorganic particle coating layer. By adjusting these parameters, the detachment process becomes more efficient and the quality of the recovered polyolefin resin is enhanced.
3Loss of substance
If 100% recycled polyolefin resin from waste separators is used, then resource conservation is maximized, but the physical properties such as Izod impact strength may be insufficient
Solution Approach 1:
The patent applies composite materials by creating a blended resin composition that combines recycled polyolefin resin with virgin polyolefin resin or compatible polymer additives. This composite approach allows the incorporation of a high proportion of recycled material (maximizing resource conservation) while the addition of virgin resin or modifiers restores and enhances critical physical properties like Izod impact strength.
Solution Approach 2:
The patent applies parameter changes by adjusting the compositional ratios of recycled resin, virgin resin, and additives in the blended composition. By optimizing these parameters, the formulation achieves a balance between resource conservation (high recycled content) and mechanical performance (sufficient impact strength and other physical properties).
Data Source
AI summary
The disclosed technology relates to a mixed recycled polyolefin resin composition comprising a recycled polyolefin resin obtained from a waste separator and a new polyolefin resin, and a recycled product using the same. The mixed recycled polyolefin resin composition comprising a new polyolefin resin and a recycled polyolefin resin from a waste separator based on an embodiment of the disclosed technology has excellent physical and chemical properties.