By Jan H. Schut
The largest plastics technical conference in the world, the Society of Plastics Engineers’ ANTEC 2010, will also be the largest plastics conference in the U.S. this year. ANTEC 2010, which runs May 16-20 in Orlando, Fl, (www.antec.ws) offers 630 technical papers and presentations from all around the world. Here are selected papers that present newsworthy topics or new technologies, many for the first time. The letter and number in brackets indicate day of the week and session when the paper is given, i.e. [M14] is Monday Session 14 and [INT6] is Interactive Session 6.
Part I below includes papers on machinery-related topics: injection molding, extrusion, ultrasound processing, and blow molding. Part II below includes papers on new materials and composites. A USB drive of all ANTEC papers is available to attendees after the show from the SPE (www.4spe.org).
A Study of Water Assisted Injection Molding in Thermoplastic Poly-Olefin (TPO) [M14] by Rachmat Mulyana, The Ohio State University (www.osu.edu). This approach to water-assisted injection molding uses pellets containing a water-carrying solid like activated carbon or soybean hulls to reduce cycle time.
Effect of Molecular Orientation Induced by Ultra-High Injection Speed on Scratch Behavior of PP [M21] by Masaya Kotaki, Kyoto Institute of Technology (www.kit.ac.jp). Injection molding PP at speeds of 10 up to 1000 mm/sec shows higher speed induces higher crystalline orientation near the surface for higher scratch resistance.
True 3D Numerical Simulation in Injection Compression Molding (ICM) [T9] by Shen-Teng Hu, CoreTech System (Moldex3D) Co. Ltd. (www.moldex3d.com). 3D simulation is proposed to optimize process parameters for the low-pressure ICM process for micro molding.
Process Control and Product Evaluation in Micro Molding Using a Screwless/Two-Plunger Injection Unit [W15] by Guido Tosello, Technical University of Denmark (www.dtu.dk). A screwless two-plunger micro injection molding machine is tested for robustness micro molding POM test samples.
Two-Component Micro-Injection Molding Technology for Manufacturing of High Precision Micro Parts [W15] by Bjoern Dormann, DESMA (www.desma.de). A two-phase piston injection molding machine is developed to mold one- and two-component micro parts.
Nano-Assembled Biaxially Oriented Polypropylene Films with High Oxygen Barrier [M11] by Yijian Lin, Case Western Reserve University (www.case.edu). Biaxially orienting 33-layer film with alternating PP-PEO layers turns micro layers into nano.
Improvement of the Feeding Zone of Single-Screw Extruders at High Rotation Speed by Using DEM [M24] by Robert Weddige, University of Paderborn (www.uni-paderborn.de). Discrete Element Method simulation seeks to improve the feeding zone for a high-speed 55-mm single-screw extruder.
Microcellular Extrusion Foaming for Linear and Long-Chain-Branched Polylactide [T32] by Wenli Zhu, University of Toronto (www.utoronto.ca). Long-chain branched PLA with 4.25% D-lactide foamed with CO2 expands more with higher foam density than linear PLA.
Prediction of Secondary Flows in Non-circular Ducts Using the Radial Functions Method [W4] by Ivan Lopez Gomez, ICIPC (www.icipc.org). Meshless “Radial Functions Method” simulates flow through square screw channels, capturing stresses caused by sudden changes in geometry.
Studying the Instabilities in Multilayer Co-extrusion of Polypropylene and Polymethylmethacrylate Films [W4] by Ranvir Soni, University of Massachusetts Lowell (www.uml.edu). Vertically orienting over a thousand layers of PP/PMMA in film instead of horizontally orienting them makes a more stable coextrusion.
Heating and Plasticizing Thermoplastics with Ultrasound for Micro Injection Molding [M13] by Thomas Kamps, Institute of Plastics Processing at RWTH Aachen University (IKV) (www.ikv-aachen.de). Ultrasonics show production potential to melt very small amounts of plastic for micro injection molding.
SONOPLAST New Process and Machinery for Micropart Moulding based on Ultrasound Excitation [W6] by Mar Folgueral, ASCAMM Technology Centre (www.ascamm.com). A patented ultrasound molding machine with a new mold concept has been built to form micro and mini plastic parts.
Ultrasonic Extrusion and Film Blowing of PA6/Clay Nanocomposites [W13] by Setareh Niknezhad, University of Akron (www.poly-eng.uakron.edu). A single-screw ultrasonic extruder successfully blows nylon 6/clay nanocomposite film.
Processing and Characterization of PEEK/MWNT Nanocomposites Prepared by High Power Ultrasonic Waves [W13] by Rishi Kumar, University of Akron (www.poly-eng.uakron.edu). A single-screw extruder with an ultrasonic barrel attachment enhances dispersion of multi-wall carbon nanotubes in PEEK.
Simulation of Twin Sheet Blow Molding Technology for Automotive Fuel Tank Industry [M4] by YingXuan Duan, Industrial Material Institute, National Research Council of Canada (www.nrc-cnrc.gc.ca). Blowview software from Jordan, Apostal, Ritter Associates (www.jar.com) simulates Inergy Automotive’s (www.inergyautomotive.com) novel Twin Sheet-Blow Molding process with a slit parison.
Advanced Investigations For The Newly Developed Special Injection molding Process “GITBlow” [W6] by Thorsten Plugge, University of Paderborn (www.ktp.web.de). A combination of gas injection and blow molding can make parts with complex thin-walled hollow sections.
Bioplastics and Alloys and Blends [M17] offers six papers characterizing and testing compounds of PLA with PBAT, talc, tributyl citrate, POM, PVA, and PHBV respectively. Authors are Mahin Shalari from Missouri University of Science and Technology (www.mst.edu) for PLA with PBAT; Caroline Abler from Rio Tinto Materials (www.riotinto.com) for PLA with talc; Juan Sierra from ICIPC (www.icips.org) for PLA with tributyl citrate; Satoshi Magai from Mitsubishi Engineering Plastics Corp. (www.m-ep.co.jp) for PLA with POM; Jun Peng from National Engineering Research Center of Novel Equipment for Polymer Processing (en.scut.edu.cn) for PLA with PVA; and Sunny Modi from The Ohio State University (www.osu.edu) for PLA with PHBV.
A New Family of Styrenic Block Copolymers for Elastomeric Films in Personal Care Applications [M29] by Andre Uzee, Dexco Polymers LP (www.dexcopolymers.com). New styrene-isoprene-butadiene-styrene quad- and tetra-block copolymers (U.S. Patent Applic. 20100056697 March 4, 2010) could be less expensive than styrene isoprene copolymers.
Enhanced Water Stability of Soy Protein Plastics Using Acid Anhydrides [T1] by Gowrishankar Srinivasan, Iowa State University (www.iastate.edu). Soy-based plastic containing 10% phthalic anhydride is ten times more water stable than the neat bioplastic.
Characterization of the Microstructure of Poly(Hydroxy Butanoic Acid) Copolymers During Their Post-Fabrication Annealing at Room Temperature [W3] by Rajendra Krishnaswamy, Metabolix Inc. (www.metabolix.com). After molding, PHB’s mechanical properties change from crystalline to mobile amorphous to rigid amorphous.
Development of Novel Nanoclay-Based Oxygen Scavengers for Plastics and Bioplastics in Packaging Applications [W3] by Jose Lagaron, IATA-CSIC (www.iata.csic.es). An iron-based nanoclay is an oxygen scavenger in an EVOH/PLA composite for food packaging.
Solving Problems with Biobased, Sustainable PLA and the Recyclability of PET for High-Value Applications via Solid-State Shear Pulverization [W17] by John Torkelson, Northwestern University (torkelson.northwestern.edu). Solid state shear pulverizing of PLA and 1 wt% microcrystalline cellulose increases PLA’s HDT. SSSP also raises rPET’s i.v.
Functional Flexible Film Technologies with Novel Roll-to-Roll Manufacturing Methods [M27] by M. Cakmak, B. Yalcin, W. Zhao, A. Blake, Dept. of Polymer Engineering, The University of Akron (www.poly-eng.uakron.edu). Advanced roll-to-roll coating technologies are proposed to create new films for electronic devices, photo voltaics and RFIDs.
Structure and Properties of Multilayer Melt Blown Microfibers [T3] by Eugene Joseph, Virginia Tech (www.vt.edu). Varying micro layers from 2 to 27 in melt blown micro fibers is shown to control mechanical properties in film-like webs.
Novel Porous Film Like Materials [INT6] by Varunraj Sekar, Virginia Tech (www.vt.edu). Nonwovens made from melt-blown multi-layer micro fibers are proposed to make film-like webs with unusual properties.
Fabrication of Micropatterned Polymer Scaffolds with a Co-Continuous Porous Structure [W15] by Wei Zhang, Georgia Institute of Technology (www.gatech.edu). Extracting the PS from embossed sheets of co-continuous PLA/PS blend creates a porous patterned PLA scaffold.