A process for recycling a laminate and a solution therefor
AssigneeThe University of Sydney
InventorsBrian Stanley HAWKETT, Duc Ngoc NGUYEN, The Vien HUYNH, Pramith PRIYANANDA
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AssigneeThe University of Sydney
InventorsBrian Stanley HAWKETT, Duc Ngoc NGUYEN, The Vien HUYNH, Pramith PRIYANANDA
Estimating the term…
The present invention relates to a recycling process for a laminate and a solution used in such a process. The present invention finds particular application in the removal of an adhered overlay from an underlying substrate material such as plastic. The process includes subjecting the laminate to an impact frictional striking force, thereby substantially separating the substrate layer from the one or more surface layers of the overlay and then washing the substrate layer with a washing solution to remove the remaining surface layers of the overlay and glue from the substrate layer. The washing solution may be an aqueous solution including a surfactant, a solvent and a base.
A process for recycling a laminate that includes a substrate layer and an overlay adhered to the substrate layer with a glue, the overlay including one or more surface layers, the process including:
The process of any one of the preceding claims, wherein the impact frictional striking force is imparted on the laminate by one or more impactors, wherein the one or more impactors have a relatively blunt leading edge.
The process of any one of the preceding claims, further including, after the subjecting step but before the washing step, segregating a mixture of the separated substrate layer and one or more surface layers of the overlay.
The process of any one of the preceding claims, further including drying the washed substrate layer.
The process of any one of the preceding claims, wherein the substrate layer includes a high-density polyethylene (HDPE) material.
The process of any one of the preceding claims, wherein the one or more surfaces of the overlay together form a label.
The process of any one of the preceding claims, wherein the washing solution is an aqueous solution comprising a surfactant and/or polymeric dispersing agent, and a solvent.
The process of any one of the preceding claims, wherein the subjecting step also fragments the laminate.
A process for recycling a laminate that includes a substrate layer and an overlay adhered to the substrate layer with a glue, the overlay including one or more surface layers, the process including:
A process for recycling a laminate that includes a substrate layer and an overlay adhered to the substrate layer with a glue, the overlay including one or more surface layers, the process including:
Use of a solution comprising a surfactant and/or a polymeric dispersing agent, and a base for removing a glue from a laminate comprising a substrate and an overlay adhered to the substrate with the glue, the overlay comprising one or more surface layers.
A recycling process including:
Dependencies are inferred from the claim text.