Abstract: A flotation apparatus used in reclaiming resin materials from bottles and other scrap articles each comprising a first low density resin component (e.g., polyethylene) bonded to a second high density resin component (e.g., polyethylene terephthlate); the scrap articles are granulated and air classified to form a primary particulate scrap which is flotation separated in two successive stages. The flotation separation stages each include a first auger in an apertured-bottom trough positioned near the top of a flotation tank with inlet means depositing a flow of particulate scrap and flotation liquid into one end of the trough; the heavy material output is afforded by a second auger in the bottom of the tank, whereas the lightweight material outlet is an overflow weir at one side of the tank. A vigorous washing apparatus using a hot aqueous medium connects the first flotation stage to the second, and a feedback connection conveys low density scrap back from the second flotation stage to the first such stage.

Abstract: A method and apparatus for reclaiming reusable resin materials from bottles and other scrap articles each comprising a first low density resin component (e.g., polyethylene) bonded to a second high density resin component (e.g., polyethylene terephthalate); the scrap articles are granulated to form a primary particulate scrap that is air classified to remove paper and film from labels, then flotation separated into a lightweight first resin (PE) material that is dried and air classified for re-use, and a secondary particulate scrap. The secondary scrap is vigorously washed in a hot aqueous medium to disrupt bonds in chips containing both resins, then thoroughly rinsed and again flotation separated into a heavy second resin material that is dried and air cleaned for re-use; there is also a residual low density scrap from the second flotation stage that is returned to the first flotation stage.