Plastics Technology

FEB 2018

Plastics Technology - Dedicated to improving Plastics Processing.

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New from the German parent of Wacker Chemical Corp., Adrian, Mich., is Elastosil LR 5040, a liquid silicone rubber (LSR) that reportedly shows excellent mechan- ical properties without post-curing. Its low volatile content complies with regu- latory specs for sensitive applications in baby care, medical, and food-contact uses. In many cases, post-cure will not be needed, Wacker says. Parts made of Elastosil LR 5040 are translucent with a delicate blue shimmer. Volatile content without post-treatment is below the required 0.5%. Tear strength without post-cure is said to be equiva- lent to that of a post-cured high-strength standard LSR. The line initially covers a hardness range of 30 to 70 Shore A. Without post-cure, hardness of the product reportedly deviates by no more than ±3 durometer points. 888-922-5374 • wacker.com No-Post-Cure LSR for Baby Care, Medical, and Food Contact High-Temperature PPA For Metal Replacement A new higher-temperature PPA has been introduced by Evonik Corp. (U.S. office in Parsippany, N.J.). New Vestamid HTplus TGP3717 also offers very good chemical resistance and dimensional stability. Due to its high crystallinity, the resin can withstand mechanical stress at up to 135 C (275 F); its glass-transition temperature is 155 C (311 F). It also retains 85% of its original modulus of elasticity at 120 C (248 F). The Vestamid HTplus line was developed specifically to substitute for metal. 973-929-8000 • evonik.com MATERIALS New 'Recyclable' Barrier Polyester for Multi-Layer PET Bottles & Films A new barrier polyester for use with PET in bottles and films was launched in September at the Drinktec 2017 show in Munich, Germany. Verian High Barrier Polyester (HBP) was introduced jointly by the resin producer, Solvay Specialty Polymers (U.S. office in Alpharetta, Ga.; solvay.com) and injection machinery and tooling builder Husky Injection Molding Systems, Bolton, Ont. (husky. co). Husky ran its HyPET HPP5 multi- layer injection molding system with the new resin, producing 17-g carbonated soft-drink preforms in a 72-cavity mold on an 8.7-sec cycle time. The three-layer system sandwiched a thin barrier layer of Verian HBP between inner and outer layers of PET. The material is said to be in the final stages of development, with produc- tion to begin in the second half of this year. Solvay currently declines to discuss details about Verian's barrier or other properties, or its compatibility with the PET recycling stream. Solvay states only that Verian HBP is based on polyglycolide chemistry, is "recyclable," and will "enable a new generation of sustainable packaging solutions for PET bottles and films." There is one other glycolide barrier polyester on the market—Kuredux PGA (polyglycolic acid) from Kureha America Inc., Houston (kuredux.com). That premium material boasts high barrier to oxygen, carbon dioxide, moisture and flavor/aroma chemicals. It also is compostable, similar to cellulose, according to Kureha. MATERIALS MATERIALS @plastechmag 71 Plastics Technology N E W P R O D U C T S F O R P L A S T I C S P R O C E S S I N G With Technology Keeping Up Materials PRODUCT FOCUS

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