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Brazilian Journal of Food Technology

On-line version ISSN 1981-6723

Abstract

CARMELO, Luis Gustavo Paulino; CALBO, Adonai Gimenez; CORREA, Daniel Souza  and  FERREIRA, Marcos David. Low-cost system to determine CO2 permeation through plastic films. Braz. J. Food Technol. [online]. 2018, vol.21, e2017071.  Epub Aug 16, 2018. ISSN 1981-6723.  https://doi.org/10.1590/1981-6723.07117.

The objective of this work was to develop a simple, low-cost and efficient method to evaluate the permeability of plastic food packaging films. Thus permeation chambers were projected and built, which allowed for the exchange of gases through a plastic film with a known area, in order to measure the specific CO2 permeability of each film. Low density polyethylene (LDPE) and polyvinyl chloride (PVC) films were evaluated. The results showed good correlation with the tests carried out using commercial permeability analysis equipments, in agreement with the values found in the specific literature. The method was shown to be efficient in the analysis of polymeric films, and could be used as a tool for determining the permeability of films to different gases, such as O2, CO2 and ethylene. Moreover, the equipment is easy to use and the parameters, such as relative humidity, temperature and flow, can be easily adjusted.

Keywords : Method; Permeability; Barrier properties; Chamber; Gas; Humidification; Packaging; LDPE; PVC.

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