Abrasive Separation of Paper-Plastic Laminates for Recycling

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Solution Overview

Problem

Multi-layered materials like paper-plastic laminates are incompatible with recycling systems that process paper and plastic separately, leading to environmental harm and reduced recycling efficiency due to shredding processes that break down polymer chains, resulting in low-quality recycled materials and increased landfill use.

Innovation Solution

A method and apparatus that separate paper and plastic layers using an abrasive surface, potentially with a pre-processing liquid to soften the paper, allowing for effective scraping and recycling of each component into high-quality materials, compatible with standard recycling systems.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multi-layered materials are processed in standard recycling systems, then the recycling process becomes incompatible and requires shredding, but this breaks down polymer chains and produces low-quality recycled materials

Engineering Contradiction:

Improvecompatibility with recycling systemsVSAvoidquality of recycled materials

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent applies segmentation by separating the multi-layered material into its individual constituent layers before recycling. The separation system divides the composite material into distinct paper and plastic layers, allowing each to be processed independently through appropriate recycling streams, thus avoiding the need for shredding that degrades material quality

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention uses extraction by removing the paper layer from the plastic layer through an abrasive separation process. This extraction enables the plastic layer to be recovered in its intact form, suitable for high-quality recycling, while the paper layer is separately collected for paper recycling processes

Inventive Principle:

Principle #2Taking out (Extraction)

2Ease of manufacture

If multi-layered materials are disposed of through landfill, then the material is contained, but this consumes landfill space and causes environmental harm from plastic pollution

Engineering Contradiction:

Improvedisposal simplicityVSAvoidenvironmental harm and landfill use

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent implements discarding and recovering by separating the multi-layered material into recoverable components. Instead of discarding the entire composite material as waste, the system recovers both the paper and plastic layers separately, enabling them to be reused in new products and preventing environmental pollution

Inventive Principle:

Principle #34Discarding and recovering

3Productivity

If an abrasive surface is used to separate layers, then effective separation is achieved, but the process requires additional equipment and processing steps

Engineering Contradiction:

Improveseparation effectivenessVSAvoidprocess complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The invention replaces complex mechanical separation systems with a simpler abrasive surface-based separation mechanism. The abrasive surface, combined with controlled friction and material softening, achieves effective layer separation without requiring complex mechanical forces or multiple processing stages

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

This approach enables environment-friendly disposal and recycling of paper-plastic laminates, reducing plastic pollution, conserving landfill space, increasing recycling rates, and preserving ecosystems by maintaining the quality of recycled materials.

Implementation Method 1

moving an abrasive second surface over the paper layer on the first side to contact the paper layer and separate portions of the paper layer from the plastic layer

Methodology Applied

Scientific EffectAbrasion: Abrasion

Implementation Method 2

a solution that is formulated to deform or break down the rigid structure of the cellulose in the paper layer

Methodology Applied

Scientific EffectChemical degradation of cellulose:

Data Source

PatentUS11951655B2Separation of multi-layered material to facilitate recycling

Publication Date: 2024.04.09 MAJUMDAR SHREYA

AI summary

A method of separating constituent layers from a paper-plastic laminate material includes disposing a sheet of a paper-plastic laminate material on a first surface. The paper-plastic laminate material includes a paper layer on a first side and a plastic layer on a second side. The method also includes moving an abrasive second surface over the paper layer on the first side to contact the paper layer and separate portions of the paper layer from the plastic layer. The method further includes collecting the separated portions of the paper layer and providing the separated portions of the paper layer as input to a paper recycling process, and collecting the plastic layer and providing the plastic layer as input to a plastic recycling process. The method may help increase recycling rates of paper and plastic, reduce raw material harvesting, reduce pollution and habitat destruction, and improve the quality of recycled material.