Plastics Technology

JUL 2018

Plastics Technology - Dedicated to improving Plastics Processing.

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stretch lines will include Davis-Standard (davis-standard.com) Optiflow LP dies and vertical oscillating haul-off technology. What's more, Sigma added four high-output recycling lines from NGR Plastics Recycling Technologies (ngr.at). The four S:Gran 125 machines will reprocess more than 4 million lb/month of film scrap. The new recycling lines represent an investment of nearly $3 million and will be installed at plants in Pompano Beach and Jacksonville, Fla.; Spartanburg, S.C., and Nashville, Tenn. MATERIALS: PP STEALS THE SHOW In materials news, polypropylene advances shined at NPE2018, with at least four resin suppliers introducing new generations of PP that redefine the material's application spectrum. New and enhanced polymerization processes and catalysts have resulted in unique PP grades for injection molding, extrusion and thermo- forming. Enhanced properties range from higher impact, stiffness and melt strength to high clarity and gloss, along with a broader temperature-resistance profile and superior processing. Exxon Mobil Chemical (exxonmobilchem- ical.com) launched the new Achieve Advanced PP family, which is based on new proprietary catalyst, process and application technology and is said to allow customers to rethink what is possible in a range of applications: • Automotive: Achieve Advanced PP8285E1 is a high-crystallinity, high-impact copolymer (ICP) said to offer 35% higher impact and 20% improved toughness (low-temperature ductility) vs. standard ICPs, enabling injection molding of components that are tougher and lighter, durable and safe. Plastomer loading can be reduced by up to 50% for cost-saving opportunities. It boasts increased opportunity to use PP for efficient designs in conventional and "new-energy vehicles." It can be used neat or in compounds for interior compo- nents such as instrument panels, door-panel trim and pillar trim, and exterior parts such as bumper fascia and wheel-well liners. • Appliances: PP7123KNE1 is reportedly suited to eye-catching appear- ance parts for appliances such as vacuum-cleaner covers as well as lids and door handles. It boasts superior gloss and stiffness and is said to be a good replacement for standard ICPs or over-engineered ABS. Other applications include cosmetics, electronics and toys. • Medical packaging, labware, electronics, automotive and indus- trial: PP1605 is a homopolymer injection molding resin based on Exxpol metallocene technology, designed for medical, electronics, automotive and other applications requiring cleanliness. It is touted for its lower volatiles and extractables and better clarity than conventional homopolymers. • Packaging: PP6282NE1 is a high-melt-strength (HMS) homopol- ymer for extrusion, sheet and thermoforming that is said to provide uniform wall distribution and remarkably rigid containers, cups and tubs for the retail and service industry. Exploiting its HMS qualities, designers can deliver stiffer packaging and gain economic benefit from excellent processability. Opportunities exist to down- gauge wall thickness by up to 15% and increase line speeds by 7% for higher output. Packaging made with this material is microwav- able, dishwasher-safe, reusable, and widely recyclable. • Nonwovens: PP6035G1 and PP6936G2 are two very high-MFR, metallocene-based homopolymers that reportedly set the bench- mark for highly comfortable melt-blown nonwovens, allowing brand owners to provide outstanding barrier properties and up to 15% higher fabric strength that can be tailored to meet the needs of diapers, wipes, and feminine-care products. A new and growing portfolio of PP compounds that deliver a soft feel combined with excellent scratch performance in unpainted, low-gloss automotive interior components was show- cased by SABIC (sabic.com). These compounds boast luxurious haptics and finishes that consumers demand—even in lower-priced vehicles. These injection molding grades can help automotive OEMs and tier suppliers reduce costs by as much as 50% through the avoidance of secondary operations such as applying soft-touch paint, fabric, foam or other surface coverings. Indian automaker Tata Motors is the first OEM to use one of the new PP compounds, which was selected for parts with a soft feel and high-end appearance in the steering-column cover and speedometer cluster top for Tata's 2017 Tiago hatchback, which was showcased at NPE2018. Tata eliminated the need for expensive paint systems, saving about 30% while achieving the same level of performance and aesthetics. At NPE2018, PE film processor Sigma Plastics Group closed deals on 13 new film lines and four recy- cling systems. Liquid Additive Manufacturing (LAM) is a new process for 3D printing LSR. This part was printed in Dow LSR on a German RepRap LAM machine. Resilient honeycomb structures are being explored for custom orthotic soles of footwear. 18 JULY 2018 Plastics Technology PTonline.com N P E 2 0 1 8 F I R S T R E P O R T Close -Up On Technolog y

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