"The overall aim of the project is to study the influence of injection conditions of various plastic materials with different properties on the migration of organic and inorganic substances that are part of children's products by contact with foods. A secondary aim is the identification and, if applicable, specific quantification of the substances that migrated from these materials after their injection in different conditions, developing the necessary test methods. In 2012, overall migration tests were performed with an acidic marker and isooctane in the most restrictive conditions of the regulations, as well as the evaluation of the use in real conditions through washing cycles, thermal shock and accelerated ageing to direct solar radiation. The most important results were:
* In the most unfavourable conditions for each marker, isooctane was more aggressive than the aqueous marker and the acidic marker.
* High density polyethylene (HDPE) generally provides greater resistance to the passage of the components (monomers, oligomers, additives, etc.) from the final product structure to the medium in contact with the polymer than does polypropylene (PP) or polystyrene (PS).
* The use of injection moulded plastic products (environmental conditions of temperature and solar radiation as well as contact with detergents) hardly influences the subsequent behaviour of these products to the migration of compounds.
* The substances that most easily migrate are the lubricant additives and processing aids such as fatty acid amides and esters (oleamides, stearamides, palmitates, stearates, etc.)."
Start date: 15/02/2011
Funding: IMPIVA cofinanced by ERDF funds
Contact: Suny Martíne