Recycling
NPE 2000 News Wrap-Up: Extrusion
At this year’s NPE, new processes to put wood flour into plastic were virtually everywhere—several even start with undried flour.
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Get Smart About Screens
Almost all extrusion processes pass melt through wire-mesh screens on the way to the die to provide filtering and improved mixing.
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Garbage In, Good Plastics Out
Experts consider it the most high-tech recycling plant in the world: Schwarzataler Kunststoff in Germany takes dirty bottles and film from post-consumer recycling and turns them into automotive and other compounds in a fully automated process.
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New Granulators Galore at NPE
Processors with scrap to grind must have noticed the prominence of screenless granulators with distinctive hooked “S-rotor” blades at the NPE show in Chicago.
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‘Dry Cleaning’ Process Recycles Contaminated Film Without Water
Cleaning contaminated plastic film with water only transfers the contamination from the film to the water.
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New Ways to Salvage Plastic Waste
European plants are the first to use several new technologies for solvent-based recovery of PVC wire coatings, centrifugal recycling of post-consumer nylon carpet, and mechanical separation of multi-material flakes.
Read MoreNPE Offered Extensive Line-Up Of New Granulators & Shredders
While most of the new granulators shown at NPE 2000 last month were beside-the-press models, there was also an accent on larger units with an appetite for tough hunks of large-diameter PVC pipe, bundles of textile fibers, and wads of molten bottle flash. Many are configured for “difficult” resins from engineering types to soft TP elastomers.
Read MoreIn Auxiliary Equipment--Small Is Big
Auxiliary equipment is shrinking to catch up with a growing market for small precision parts. Dryers, loaders, blenders, grinders, and chillers have all dropped in size for accuracy and fast product changeovers.
Read MorePET Recycling Line Crystallizes While Chopping
A new method of recycling PET into pellets or directly into extruded sheet is said to save time and energy by combining crystallizing and drying with size reduction in one piece of equipment.
Read MoreExtrusion/Molding Process Turns Scrap into New Car Doors
On the television screen, it looks a lot like two giant tubes squirting out black toothpaste.
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