Development of High-Barrier Film for Food Packaging

Fereydoon, Maryam; Ebnesajjad, Sina

doi:10.1016/b978-1-4557-3112-1.00005-3

Cited by 12 publications

(18 citation statements)

References 21 publications

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Section: Polymer Filmsmentioning

confidence: 99%

“…It should be noted that several features and functions must be accounted for to describe the performance requirements of polymer films depending on their final application. Barrier properties, selective permeability, mechanical properties, thickness, sealability and optical properties are some examples of the functions and properties expected for various food packaging applications [12].Barrier properties in polymer films are related with limiting permeation of gases like oxygen, nitrogen, carbon dioxide, and water vapor. For example, oxygen has an important effect on the deterioration of food quality, particularly in the case of oxygensensitive foods [12].…”

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confidence: 99%

“…The objective of the sealant layer is to protect the food products by supplying a hermetic seal. Low density polyethylene (LDPE), ethylene vinyl acetate (EVA) and metallocene polyethylene (mPE) plastomers are the most commonly used polymers for the sealant layer [12]. Ethylene vinyl alcohol (EVOH) and polyvinylidene chloride (PVDC) are typically used as the core layer because of their low gas permeability to reduce gas transfer into the package [12].…”

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confidence: 99%

“…Lastly, the role of the outer layer is to protect the products against external attacks and stresses. Thus, polymers such as polypropylene (PP), polyamide (PA), polyethylene terephthalate (PET) and high density polyethylene (HDPE) are used as the "abuse resistant" layer [12].One of the most popular approaches for constructing multilayer films is layer by layer (LbL) assembly because of its robustness and simplicity [13], [16]. This method provides manufactured films with the desired number of layer and thickness, and coating uniformity making it appropriate for gas barrier applications and multifunctional films.…”

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confidence: 99%

“…Barrier properties, selective permeability, mechanical properties, thickness, sealability and optical properties are some examples of the functions and properties expected for various food packaging applications [12].…”

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Characterization of PLA-talc films using NIR chemical imaging and Multivariate Image Analysis techniques

2018

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Maîtrise en génie chimiqueToutefois, puisque la structure de ces films est plus complexe, le contrôle de qualité de ces derniers est plus difficile. Dans l'industrie, des méthodes hors-ligne sont très souvent utilisées pour effectuer le contrôle de qualité des films produits. Le contrôle est nécessaire puisque la variabilité de la matière première ainsi que le changement des conditions opératoires amènent des modifications qui changent considérablement les propriétés du film. Par conséquent, une inspection en temps réel ainsi qu'un contrôle des films de polymère est nécessaire sur la ligne de production afin d'obtenir un contrôle de qualité s'approchant de l'analyse en temps réel.Un système d'imagerie proche infrarouge (NIR) rapide et non-destructif est proposé pour caractériser les films biodégradables d'acide polylactique contenant du talc produits par extrusion-soufflage et utilisés pour l'emballage. Le but ultime est d'utiliser le système pour faire un contrôle de qualité sur la ligne d'extrusion ainsi qu'après le post-traitement thermique, soit le recuit. Un ensemble d'échantillon de film de PLA contenant différentes concentrations en talc ont été fabriqués. Ces derniers ont ensuite été soumis à différentes conditions de recuit. Des images NIR ont été collectées avant la caractérisation des propriétés physiques et mécaniques ainsi que l'étanchéité aux gaz. Des techniques d'imagerie multivariées ont été appliquées aux images hyperspectrales. Celles-ci ont montré que la quantité de talc peut être déterminée et que l'information du spectre NIR permet de prédire les propriétés du film. Dans tous les cas, la méthode proposée permet de déterminer les variations dans les propriétés du film avec une bonne précision. iv AbstractFood packaging plays a great role in the food industry to maintain food products quality as long as possible. Polymer films are widely used in food packaging and also attract attention because of their outstanding advantages. Since petroleum-based polymers are known to cause environmental concerns, biodegradable polymers like PLA were studied more intensively in recent years due to their environmentally friendly properties. The application of reinforced films exceeds simple ones in achieving specific functions and enhancing their properties such as barrier properties. Since the films structures are more complex, quality control is more challenging. In industry, off-line methods are vastly used for quality control of the produced films while variability in raw materials and processing conditions substantially change the film specifications. Consequently, real-time inspection and monitoring of polymer films is needed on the production line to achieve a real-time quality control of the films.A fast and non-invasive near-infrared (NIR) imaging system is proposed to characterize biodegradable polylactic acid (PLA) films containing talc, and produced by extrusion film-blowing for packaging applications. The ultimate goal is to use the system for quality control on the extrusion line, and after a po...

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Section: Polymer Filmsmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Characterization of PLA-talc films using NIR chemical imaging and Multivariate Image Analysis techniques

2018

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Pilot‐scale demonstration of novel tandem coating process: Combining dispersion and extrusion coating with enhanced barrier properties

Toriseva

Lahti

Kuusipalo

2023

J of Applied Polymer Sci

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Increasing environmental and legislative demands have accelerated the development of new packaging materials and processes toward more sustainable alternatives. Furthermore, barrier properties of the packaging have become increasingly important, as food waste creates environmental problems. Nowadays, multilayer structures are typically used to create required barrier properties to the packages. The aim of the study was to combine dispersion and extrusion coating into consecutive tandem process to produce two‐layer structure with enhanced barrier properties. By combining two processing steps into one, time and resources are saved. The study presents demonstration of the tandem coating in pilot‐scale. The process was tested with several different materials and combinations and the processing conditions were optimized to produce optimal layer structure and properties. The properties of samples were analyzed with microscopy imaging, pinhole measurement and barrier measurements including oxygen, water vapor and grease permeation. Single layer of dispersion coatings could not produce continuous film, but the extrusion coatings filled the pinholes and enabled low permeation values. The permeabilities of the tandem coated structures were promising and generally lower than the sum of two individual layers. Moreover, the tandem coated structures produced with sustainable alternatives, performed better than traditional materials in oxygen and grease permeation measurements.

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Mechanical and Barrier Properties Enhancement in Film Extruded Bio‐Polyamides With Modified Nanoclay

et al. 2018

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The plastics industry is increasingly oriented towards the use of bio‐based polymers replacing the fossil‐based ones. Bio‐based polyamides (PAs) in the film packaging application are not still used and need enhancement to overcome some drawbacks. In this scenario, fully (PA10.10) and partially (PA6.10) bio‐based PAs were extruded in a laboratory sheet‐casting machine. The materials used to obtain films were previously melt blended with modified clay in a twin‐screw extruder. The resulting films were morphologically investigated through the scanning electron microscope. The magnifications show agglomerated particles and the packed layers are preferentially aligned in the extrusion machine direction. X‐rays confirm that 5 wt% of clay content is difficult to exfoliate in such matrices. The crystallinity was studied by using X‐ray diffraction (XRD) and differential scanning calorimetry. The XRD results show coexisting α and γ phases in the PA6.10 while the presence of only γ in the PA10.10. The presence of clay platelets constrains the crystallites formation, especially in the more polar PA6.10, resulting in changes in the type and the amount of crystals. The mechanical analysis data showed that 5 wt% of clay induced significant improvement in Young's modulus (+68 and + 14%), a slight increase in the tensile yield stress (+21 and + 5%) and only a surprisingly small decrease in the deformation at break (−15 and −24%) for PA10.10 and PA6.10, respectively. Furthermore, the addition of clay gave the best oxygen barrier properties reaching a value of 1.8 ± 0.2 cm3 × mm/m2 × day × atm comparable to a commercial PA6 film used in the packaging field. POLYM. COMPOS., 40:2617–2628, 2019. © 2018 Society of Plastics Engineers

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Development of High-Barrier Film for Food Packaging

Cited by 12 publications

References 21 publications

Characterization of PLA-talc films using NIR chemical imaging and Multivariate Image Analysis techniques

Characterization of PLA-talc films using NIR chemical imaging and Multivariate Image Analysis techniques

Pilot‐scale demonstration of novel tandem coating process: Combining dispersion and extrusion coating with enhanced barrier properties

Mechanical and Barrier Properties Enhancement in Film Extruded Bio‐Polyamides With Modified Nanoclay

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