Plastics Technology

APR 2017

Plastics Technology - Dedicated to improving Plastics Processing.

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A 2016 European study raised doubts about the effective- ness of virgin PET as a barrier cap layer in a multi-layer package also containing post-con- sumer reclaim (PCR). But more recent research using computer simulations has reaffirmed guidelines issued in 2006 by the U.S. Food and Drug Administration (FDA). Those guidelines, Guidance for Industry: Use of Recycled Plastics in Food Packaging: Chemistry Considerations state that with the right structural elements, a virgin skin cap layer indeed performs as an acceptable functional barrier over PCR materials for food contact. By Sushant Jain, PTi LLC Study refutes previous research that raised doubts over V-PET's effectiveness as a functional barrier layer when coextruded with R-PET. New Research Reaffirms FDA Guidelines for Virgin PET Cap as Barrier Die Lip Feedblock & Die Entrance Die Manifold This tooling package was used to simulate expected permeation of toluene out of the core PCR layer. The results of this more recent study were presented first by Processing Technologies LLC (PTi), Aurora, Ill., in December at Plastics Technology's Extrusion 2016 confer- ence. PTi conducted the study last year in collabora- tion with Plastic Technologies Inc., Holland, Ohio, and Container Science Inc., Atlanta. Plastic Technologies Inc. (plastictechnologies.com) is recognized worldwide as a leading source for preform and package design, package development, rapid prototyping, pre-production proto- typing, and material evaluation engineering for plastics packaging. Container Science Inc. was founded in January 2002 to offer materials-science expertise for improving the FIG 1 52 APRIL 2017 Plastics Technology PTonline.com BARRIER PACK AGING

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