Plastics Technology

APR 2017

Plastics Technology - Dedicated to improving Plastics Processing.

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ABOUT THE AUTHOR: Sushant Jain is senior scientist, applications and technology, for Processing Technologies LLC, Aurora, Ill., a leading supplier of complete sheet extru- sion systems. Jain has 30 years of extensive experience in the plastics industry. He has held leadership roles in R&D;, product and process development, and lean manufacturing with leading packaging companies such as Pactiv, American National Can, Amoco Foam Products, and Continental Can. He has devel- oped and commercialized containers for food/ nutritional products. Contact: (630) 585-5800; sjain@ptiextruders.com; ptiextruders.com. 0 100 200 300 400 500 600 700 800 0 100 200 300 400 500 600 700 800 40 Mil Sheet, mils 40 Mil Sheet, mils Virgin Cap Virgin Cap Core Core PTi performed four simulations of the FDA-recommended challenge test (coextrusion of virgin/PCR/ virgin with 780 ppm of toluene in PCR). The graphs show the concentration of toluene in the core and cap layers at the end of the extrusion process for the four simulations. In each scenario the virgin cap layers maintain their suitability as a functional barrier. 20 16 12 8 4 0 20 16 12 8 4 0 HVTSE With PIR HVTSE Without PIR NEGRI BOSSI NORTH AMERICA Tel: (302) 328-8020 | info@negribossi.us BRAND NEW FROM NEGRI BOSSI... The CANBIO ST! The best performing 5-point double toggle machine just got better! Cutting-edge servo-pump injection molding technology results in maximum efficiency, repeatability, reliability, and SAVINGS! Five flexible models in the 180–500 tonne range with injection capacities of 9.5–155.7 oz. PS. Heavy duty construction and generous specifications ensure an excellent return for your investment. www.negribossi.com C A N B I O S T ACCURATE. EFFICIENT. DEPENDABLE. Servo-Pump Injection Molding Machines with New TACTUS™ Touchscreen PC Controller MODELS 180 • 250 • 330 • 400 • 500 indicate that exposure time during extru- sion processing has some impact, with the simulation models showing primary contaminant migration occurring in the feedblock and die area. However, in this area migration is found primarily at the interface and not throughout the virgin cap layer. Furthermore, this study demonstrates that virgin cap layers can remain uncon- taminated at a layer thickness greater than 1 mil, proving the functional barrier remains intact during the extrusion process and reaffirming FDA guidelines for use as an effective barrier. Simply, with the right structural elements, a virgin skin cap layer performs as an acceptable functional barrier over PCR materials for food contact in accordance with the original guidelines established by the FDA. Ultimately, food packagers/sheet processors should demonstrate to the FDA that their manufacturing process and package produced meet the relevant food safety requirements. =Final =Final Net Concentration Toluene, ppm Net Concentration Toluene, ppm @plastechmag 55 Plastics Technology PE T Sheet

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