The use of mechanical analyses, scanning electron microscopy and ultrasonic imaging to study the effects of high‐pressure processing on multilayer films

Caner, Cengiz; Hernández, Rubén J.; Pascall, Melvin A.; Riemer, J.

doi:10.1002/jsfa.1437

Cited by 40 publications

(31 citation statements)

References 21 publications

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“…Scanning acoustic microscopy (C-SAM) has been utilized as an alternative to provide subsurface information on various plastics. C-SAM can detect, classify, and accurately produce an image of opaque materials using ultrasonic waves ranging from 5 to 500 MHz by means of a pulsed focused beam in a raster pattern over a sample [8]. This technique can show changes in elastic properties occurring between two constituents in a multilayer structure or within one constituent.…”

Section: Other Testing Approaches For Evaluation Of Hpp Effects On Pamentioning

confidence: 98%

“…Delamination, detachment, cracks and folds are indirectly associated with increased permeation rates of aroma compounds such a p-cymene [16]. By means of SEM, Caner et al [8] identified small wrinkles in packaging materials PET/Al 2 O 3 / LDPE, PET/SiO x /LDPE and PET/PVDC/4%EVA/LLDPE after HPP (800 MPa and 45°C), showing that physical integrity was not affected. However, numerous fold and wrinkles were seen on the food contact layer of a MET-PET material, making it not suitable for HPP.…”

Section: Other Testing Approaches For Evaluation Of Hpp Effects On Pamentioning

confidence: 98%

“…Microscopy Scanning electron microscopy (SEM) has been applied to detect damages (e.g., delamination, detachment, crack, and folds) to the external surfaces of packages after HPP treatment [8,15,16]. For example, SEM demonstrated an increase in tensile strength of a silicon-based material (PP/SiO x ) after 400 MPa and 60°C, showing that the structure is completely broken after HPP.…”

Section: Other Testing Approaches For Evaluation Of Hpp Effects On Pamentioning

confidence: 99%

“…Adhesion between layers can be compromised if compressibility and resilience of individual layers differ significantly. The resulting gaps between the layers may even affect the microbiological safety of the package [8].…”

Section: Barriers For Flexible and Semi Rigid Packagingmentioning

confidence: 99%

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Polymeric-Based Food Packaging for High-Pressure Processing

et al. 2010

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High-pressure processing (HPP) of foods mainly utilizes flexible packaging materials for commercial products. Many materials have been evaluated for their adequacy in the process. There are a number of integrity requirements for these packaging materials that must be complied with for acceptance and use in different product applications. These include visual integrity, gas permeability, seal and physical strength properties, and global migration of packaging components into the food, some of which are specific to either refrigerated or shelf-stable products. Different laminate options reported in the literature were reviewed in this article with the aim of classifying suitable packaging materials for HPP at both lowand high-temperature conditions according to these requirements. Packaging materials currently utilized in industry are also listed. The suitability of standards to assess requirement deviations after HPP is also discussed. Current scientific literature has shown to lack information on one or more of these requirements to provide a complete picture for their suitability. Studies have shown that EVOH-based and other high-pressure-high-temperaturetreated materials do not follow the barrier requirements established by the US Army for shelf-stable products. However, they still show potential for their utilization in the development of commercial products. The importance of package headspace on package integrity is also highlighted. Studies on transport phenomena such as material sorption and diffusion of components from the food and the pressurization fluid are described. Methods such as SEM, C-SAM, DSC, FT-IR, and X-Ray diffraction provide complementary information to assess the structural and barrier changes observed during HPP. The article concludes by providing preliminary recommendations according to specific requirements that are met after the process. Other types of materials not yet evaluated for HPP are presented as potential alternatives to be explored for this technology.

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Section: Other Testing Approaches For Evaluation Of Hpp Effects On Pamentioning

confidence: 98%

Section: Other Testing Approaches For Evaluation Of Hpp Effects On Pamentioning

confidence: 98%

Section: Other Testing Approaches For Evaluation Of Hpp Effects On Pamentioning

confidence: 99%

Section: Barriers For Flexible and Semi Rigid Packagingmentioning

confidence: 99%

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Polymeric-Based Food Packaging for High-Pressure Processing

et al. 2010

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“…Unos de los factores más importantes que han contribuido al éxito de los envases plásticos es la posibilidad de utilizar estructuras multicapa. Dicho complejo multicapa, adecuado para preenvasar alimentos que van a ser tratados con altas presiones, debe de poseer la suficiente flexibilidad, elasticidad y resistencia a delaminación durante el proceso de compresión, ya que la pérdida de integridad estructural puede implicar un deterioro en la calidad y seguridad del alimento envasado 25 .…”

Section: Tratamiento Con Altas Presiones Hidrostáticasunclassified