Plastic recycling machine

"We already have a magnet on the line — why do we need an eddy current separator?" Because they remove completely different metals. A magnetic separator catches ferrous metal and is blind to aluminum and copper. An eddy current separator (ECS) ejects non-ferrous metal and does nothing for steel. Lines that install only one of the two end up with the other half of the contamination still in the flake. Here is how each technology works, and the order they belong in. An eddy current separator throws non-ferrous metals forward off the belt while plastic falls straight down. The Dividing Line: Ferrous vs Non-Ferrous   Magnetic Separator Eddy Current Separator Removes Ferrous metals: iron, steel, tinplate Non-ferrous metals: aluminum, copper, brass, bronze Principle Permanent or electromagnetic field attracts and holds ferrous pieces A fast-spinning alternating-pole rotor induces eddy currents in non-ferrous pieces; the opposing field repels them off the belt Blind spot A...

Cold washing removes loose dirt. It does not remove hot-melt label glue, cooking oil, grease, or the food residue baked onto post-consumer PET and HDPE flakes — and those are exactly the contaminants that downgrade flake quality and price. That gap is what hot washing exists to close. This article explains when a hot wash step actually pays for itself, how a continuous hot washer works, and how to size one for a washing line. A continuous hot washer keeps flakes immersed in heated washing solution while a high-speed rotor scrubs them. What Hot Washing Removes That Cold Washing Cannot Heat and chemistry do the work that friction alone cannot. In a heated alkaline solution, label adhesives soften and release, oils and grease emulsify instead of smearing across flake surfaces, and dried food residue hydrates and lifts off. The contaminants a hot washer is built for are specific: Hot washing targets Hot-melt and pressure-sensitive label glue Oils, grease, and fat residues from f...

Plastic film recycling has one stubborn bottleneck: flimsy, wet, low-bulk-density material that is difficult and expensive to handle. Densification—especially when paired with efficient dewatering—turns that bottleneck into a throughput boost. In this guide, Rumtoo Machinery explains how densifiers and squeezer-densifier systems work, which KPIs matter, and how to select the right configuration for your line. The article is written for manufacturers, industrial recycling equipment buyers, and plant engineers across the USA and Europe who need technical depth and practical selection criteria. What a Plastic Film Densifier Does (and Why It Matters) In film recycling, you’re constantly fighting three disadvantages: extremely low bulk density (~20–50 kg/m³ for loose LDPE/LLDPE film), high moisture after washing, and inconsistent feeding into extruders or pelletizers. A plastic film densifier: Raises bulk density (often 3–6×), stabilizing material flow. Removes free and bound water ...

There is no single way to recycle plastic. The right method depends on the polymer, how contaminated the waste is, and what the recovered material needs to become. Industry practice groups the options into four methods — mechanical, chemical, dissolution, and organic recycling. This guide explains how each one works, what it handles well, and where its limits are. 1. Mechanical Recycling Mechanical recycling is the most established and widely used method, and the workhorse for PET and HDPE — the resins behind soft drink bottles and rigid containers. It processes plastic waste physically, without changing the polymer's chemical structure, in five stages: Collection — waste is gathered from households, businesses, and recycling centers; separately collected streams recycle at rates many times higher than mixed collection. Sorting — plastics are separated by type and color, increasingly by automated sorting machines ; this step largely decides the quality of the final mater...