Recycled EPS Hot-Melt Adhesive Composition for Waste Reduction
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Solution Overview
Problem
The disposal of expanded polystyrene (EPS) and expanded polyethylene (EPE) in landfills due to inefficient recycling and their non-biodegradability poses a significant waste management issue, and there is a need for a productive use of these materials in adhesive production.
Innovation Solution
A hot-melt adhesive is formulated using recycled EPS or EPE as the polymer base, combined with an aromatic hydrocarbon oil and optional tackifiers, to create a solid adhesive compound.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If recycled EPS or EPE is used as the polymer base in hot-melt adhesive, then waste reduction and sustainability are improved, but the adhesive formulation complexity increases
Solution Approach 1:
The patent changes the chemical composition parameters of the adhesive by incorporating recycled EPS or EPE polymers combined with specific aromatic hydrocarbon oils and tackifiers in defined weight ratios, transforming waste materials into functional adhesive components with controlled chemical properties
Solution Approach 2:
The invention creates a composite adhesive formulation by combining recycled polymer materials (EPS or EPE) with aromatic hydrocarbon oil and tackifiers, producing a multi-component material system that leverages the complementary properties of each component to achieve effective adhesion
2Quantity of substance
If recycled EPS or EPE is used as the polymer source, then material availability and cost-effectiveness are improved, but the processing temperature control becomes more critical
Solution Approach 1:
The patent optimizes the processing temperature parameter by selecting aromatic hydrocarbon oils with specific boiling points (above 300°F) that match the melting ranges of recycled EPS or EPE, enabling effective adhesive processing at controlled temperatures that prevent polymer degradation while ensuring proper melting and bonding
3Reliability
If aromatic hydrocarbon oil with high boiling point is used, then adhesive stability at high temperature is improved, but the volatility and safety concerns increase
Solution Approach 1:
The patent selects aromatic hydrocarbon oils with boiling points above 300°F, which provides high thermal stability for the adhesive formulation while the enclosed processing system and controlled application methods mitigate volatility and safety concerns by preventing uncontrolled evaporation and exposure
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 solution provides a sustainable use for recycled EPS and EPE, reducing waste and offering a cost-effective, readily available polymer source for adhesives, while maintaining adhesive properties.
Implementation Method 1
a hot-melt adhesive having a base mixture of an aromatic hydrocarbon oil and a polymer such as recycled expanded polystyrene (EPS) or expanded polyethylene (EPE)
Implementation Method 2
The gun uses a continuous-duty heating element to melt the plastic glue
Implementation Method 3
The glue squeezed out of the heated nozzle
Data Source
AI summary
A hot-melt adhesive having a base made from a process oil and polymer comprising either recycled expanded polystyrene (EPS) or recycled expanded polyethylene (EPE) is provided. The hot-melt adhesive comprises substantially equal parts process oil and polymer. The process oil is preferably an aromatic hydrocarbon process oil. Additional materials such as tackifiers and/or fillers can be added to adjust the specific properties of the adhesive for its intended use.