Category Archives: Uncategorized

‘SSSP’ Technology Is Finally Commercial

By Jan H. Schut Solid State Shear Pulverization, which chills a co-rotating twin-screw extruder below the softening temperature of plastic rather than allowing it to melt, is finally commercial after more than 20 years of R&D. Zzyzx Polymers LLC, Allentown, … Continue reading

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‘Exjection’ Molding Comes into Its Own

By Jan H. Schut At least two commercial technologies combine extrusion with injection molding to fill molds with much lower pressure than conventional injection molding. One was recently introduced by Extrude to Fill LLC, Loveland, CO (www.extrudetofill.com), which melts plastic … Continue reading

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Unusual ‘Extrusion’ Molding Is Commercial

By Jan H. Schut Low-shear, low pressure “extrusion” molding machines developed by Extrude to Fill LLC, Loveland, CO (www.extrudetofill.com), a 2014 start-up, have been commercially molding tiny acoustic parts since 2015. Extrude to Fill’s process melts plastic without motion using … Continue reading

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New Shapes for Conformal Cooling

Conformal cooling channels in injection molds have been built by additive manufacturing, or 3-D printing, developmentally since the late 1990s using successive thin layers of metal. Continue reading

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Trolling for New Technology: ANTEC 2016

By Jan H. Schut New technologies at ANTEC 2016, the Society of Plastics Engineers Annual Technical Conference, held this year in Indianapolis, IN May 23-25 (www.4spe.org), include an array of unusual functional structures created in plastics and composites by means … Continue reading

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Competition Bubbles Up Again in Physical Foam Molding

By Jan H. Schut Physical foam molding has been dominated for over 15 years by MuCell microcellular foam technology from Trexel Inc., Wilmington, MA (www.trexel.com), commercialized in 1999 and backed by a master part patent on “Injection Molding of Microcellular … Continue reading

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New Process Makes PLA Block Copolymers

By Jan H. Schut A new two-stage catalytic process from NatureWorks LLC, Minnetonka, MN (www.natureworksllc.com), the world’s largest producer of polylactic acid (PLA) biopolymer, takes an unusual mixed lactic acid feed stream, invented at Nagoya University in Japan (www.agr.nagoya-u-ac.jp), and … Continue reading

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