Mechanical and thermal behaviour of flexible food packaging polymeric films materials under high pressure/temperature treatments

Abstract

The effect of high-pressure processing on mechanical and thermal properties of four complex packaging materials (polyethylene/ethylene vinyl alcohol/ polyethylene: PE/EVOH/PE; metallized polyester/polyethylene: PETmet/PE; polyester/ polyethylene: PET/PE; polypropylene SiOx recovered: PPSiOx) was studied. Pouches of the different materials containing distilled water or olive oil as food simulants, as well as empty ones, were subjected to 400 MPa for 30 min, at temperatures of 20 or 60°C. Delamination and wrinkling were a general consequence of the high-pressure processing of multilayer polymeric systems. However, no signifi cant changes were observed regarding the mechanical properties of PE containing laminates after pressurization. PPSiOx underwent signifi cant modifi cations as SiOx completely broke down. Neither thermal property was affected by pressure, as it was the processing temperature that induced tempering effects on the crystallization behaviour of polymeric components. Only PE/EVOH/ PE, when in contact with water as a simulant, presented a decrease in the melting point temperature.

Effect of porous zeolite on temperature-dependent physical properties of polypropylene/octadecane (PP/OD) composite films

“…Mechanical properties Mechanical properties of the PP/OD/ZL composite films were measured using a universal testing 3.7. Physical properties of the composite films exposed to food simulants and thermal treatment When the food application of the as-prepared composite films, it is considered contacts with waterbased, alcohol-based, acid-based, and lipid-based products [15,16]. Therefore, food contact simulations were performed in accordance with Regulation (EC) No 1935/2004 [17] and Regulation (EU) No 10/2011 [18] by using four different substances (distilled water at 40°C for 10 day, 3% v/v acetic acid at 40°C for 10 day, 10% v/v ethanol at 40°C for 10 day, and iso-octane at 20°C for 2 day) [16][17][18].…”

“…Physical properties of the composite films exposed to food simulants and thermal treatment In order to protect packaging applications from contamination, it is critical to evaluate physical properties of a packaging material after the contact with various products, high pressure, or thermal treatment [15,16]. In this study, we have investigated the OTRs and mechanical properties of the composite films exposed to four different food simulants and thermal treatment.…”

“…Morphological structures, thermal properties, permeability values, and mechanical properties of the fabricated PP/OD/ZL composite films were thoroughly investigated as functions of the ZL content and temperature. To utilize the as-prepared composite films in food and medical device packaging and sterilization applications, it is critical to evaluate changes in stability, compatibility, and physical properties of the composite films caused by their exposure to high temperatures and different kinds of food [15,16] …”

Benefits and limitations of food processing by high-pressure technologies: effects on functional compounds and abiotic contaminants Beneficios y limitaciones del procesamiento de alimentos por tecnologías de alta presión: efectos en componentes funcionales y contaminantes abióticos

“…In the case of PATP-treatments, the package has to retain physical integrity and chemical composition at high temperature and pressure. Most studies on food packaging materials used for HPP-treated foods have focused on the modification of physical and mechanical properties such as tensile strength, delamination, wrinkling, elongation at failure point, film thickness and melting point temperature (Galotto et al, 2008;Lambert et al, 2000). There is a need for further research on HPP effects on mass transfer processes between food, packaging films, and storage environment (Pereira & Vicente, 2010).…”

Polyaryletherketone: Ageing Effect on Physicomechanical and Thermal properties

“…Therefore such polymers which undergo migration or leaking must be avoided as a packaging material. Such polymeric materials have been investigated under specific conditions to study their physical, mechanical, chemical and thermal properties to develop better understanding about their application [8][9]. Various packaging material can be used for e.g.…”