Food-Packaging Interaction — Technical Aspects of Polymeric Materials

2018 ◽  
pp. 337-340
Author(s):  
Robert W. Keown
Keyword(s):  
Food Packaging ◽  
Polymeric Materials ◽  
Technical Aspects

scholarly journals Nanocomposites Materials of PLA Reinforced with Nanoclays Using a Masterbatch Technology: A Study of the Mechanical Performance and Its Sustainability

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2133
Author(s):  
Helena Oliver-Ortega ◽  
Josep Tresserras ◽  
Fernando Julian ◽  
Manel Alcalà ◽  
Alba Bala ◽  
...  
Keyword(s):  
Food Packaging ◽  
Mechanical Performance ◽  
Polymeric Materials ◽  
Barrier Properties ◽  
Food Tray ◽  
Environmental Concerns ◽  
Poly Lactic Acid ◽  
The Matrix ◽  
Surface Modified ◽  
Being Moved

Packaging consumes around 40% of the total plastic production. One of the most important fields with high requirements is food packaging. Food packaging products have been commonly produced with petrol polymers, but due to environmental concerns, the market is being moved to biopolymers. Poly (lactic acid) (PLA) is the most promising biopolymer, as it is bio-based and biodegradable, and it is well established in the market. Nonetheless, its barrier properties need to be enhanced to be competitive with other polymers such as polyethylene terephthalate (PET). Nanoclays improve the barrier properties of polymeric materials if correct dispersion and exfoliation are obtained. Thus, it marks a milestone to obtain an appropriate dispersion. A predispersed methodology is proposed as a compounding process to improve the dispersion of these composites instead of common melt procedures. Afterwards, the effect of the polarity of the matrix was analyzing using polar and surface modified nanoclays with contents ranging from 2 to 8% w/w. The results showed the suitability of the predispersed and concentrated compound, technically named masterbatch, to obtain intercalated structures and the higher dispersion of polar nanoclays. Finally, the mechanical performance and sustainability of the prepared materials were simulated in a food tray, showing the best assessment of these materials and their lower fingerprint.

scholarly journals Optical Properties of Polypropylene upon Recycling

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Felice De Santis ◽  
Roberto Pantani
Keyword(s):  
Optical Properties ◽  
Rheological Properties ◽  
Isotactic Polypropylene ◽  
Food Packaging ◽  
Polymeric Materials ◽  
Optical Characteristics ◽  
Cooling Rates ◽  
Commercial Grade

In the last few years there has been an increasing interest in the possibility of recycling polymeric materials, using physical recycling. However, is it well known that polymers experience a depletion of all the properties upon recycling. These effects have been widely characterized in the literature for what concerns the mechanical or rheological properties. The changes of optical properties after recycling have been much less studied, even if, especially in food packaging, optical characteristics (above all the opacity) are of extreme importance, and thus it is quite significant to assess the effect of recycling on these properties. In this work, the influence of recycling steps on the opacity of films of a commercial grade of isotactic polypropylene (i-PP) was studied. The material was extruded several times to mimic the effect of recycling procedures. After extrusion, films were obtained by cooling samples of material at different cooling rates. The opacity of the obtained films was then measured and related to their crystallinity and morphology. It was found that opacity generally increases on increasing the amount ofαphase and for the same amount ofαphase on increasing the size of the spherulites.

scholarly journals Vegetable Additives in Food Packaging Polymeric Materials

Polymers ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 28 ◽  
Author(s):  
Silvestru Bogdănel Munteanu ◽  
Cornelia Vasile
Keyword(s):  
Plant Extracts ◽  
Food Packaging ◽  
Polymeric Materials ◽  
Lignocellulosic Materials ◽  
Lignocellulosic Fibers ◽  
Nano Cellulose ◽  
Biomass Plant ◽  
Phenolic And Flavonoid ◽  
Phenolic And Flavonoid Compounds ◽  
By Products

Plants are the most abundant bioresources, providing valuable materials that can be used as additives in polymeric materials, such as lignocellulosic fibers, nano-cellulose, or lignin, as well as plant extracts containing bioactive phenolic and flavonoid compounds used in the healthcare, pharmaceutical, cosmetic, and nutraceutical industries. The incorporation of additives into polymeric materials improves their properties to make them suitable for multiple applications. Efforts are made to incorporate into the raw polymers various natural biobased and biodegradable additives with a low environmental fingerprint, such as by-products, biomass, plant extracts, etc. In this review we will illustrate in the first part recent examples of lignocellulosic materials, lignin, and nano-cellulose as reinforcements or fillers in various polymer matrices and in the second part various applications of plant extracts as active ingredients in food packaging materials based on polysaccharide matrices (chitosan/starch/alginate).

scholarly journals Biofilm Formation Reduction by Eugenol and Thymol on Biodegradable Food Packaging Material

Foods ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 2
Author(s):  
Pavel Pleva ◽  
Lucie Bartošová ◽  
Daniela Máčalová ◽  
Ludmila Zálešáková ◽  
Jana Sedlaříková ◽  
...  
Keyword(s):  
Food Quality ◽  
Polymer Films ◽  
Biofilm Formation ◽  
Food Packaging ◽  
Polymeric Materials ◽  
Poly Lactic Acid ◽  
Bacterial Strains ◽  
Butylene Succinate ◽  
Active Food Packaging ◽  
Materials Used

Biofilm is a structured community of microorganisms adhering to surfaces of various polymeric materials used in food packaging. Microbes in the biofilm may affect food quality. However, the presence of biofilm can ensure biodegradation of discarded packaging. This work aims to evaluate a biofilm formation on the selected biodegradable polymer films: poly (lactic acid) (PLA), poly (butylene adipate-co-terephthalate) (PBAT), and poly (butylene succinate) (PBS) by selected bacterial strains; collection strains of Escherichiacoli, Staphylococcusaureus; and Bacillus pumilus, Bacillussubtilis, Bacillustequilensis, and Stenotrophomonasmaltophilia isolated from dairy products. Three different methods for biofilm evaluation were performed: the Christensen method, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, and fluorescence microscopy. High biofilm formation was confirmed on the control PBS film, whereas low biofilm formation ability was observed on the PLA polymer sample. Furthermore, the films with incorporated antimicrobial compounds (thymol or eugenol) were also prepared. Antimicrobial activity and also reduction in biofilm formation on enriched polymer films were determined. Therefore, they were all proved to be antimicrobial and effective in reducing biofilm formation. These films can be used to prepare novel active food packaging for the dairy industry to prevent biofilm formation and enhance food quality and safety in the future.

scholarly journals Polymeric Materials: Surfaces, Interfaces and Bioapplications

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1312
Author(s):  
Alexandra Muñoz-Bonilla ◽  
Coro Echeverría ◽  
Águeda Sonseca ◽  
Marina P. Arrieta ◽  
Marta Fernández-García
Keyword(s):  
Tissue Engineering ◽  
Food Packaging ◽  
Polymeric Materials ◽  
Dental Restoration ◽  
Special Issue ◽  
Agricultural Films

This special issue “Polymeric Materials: Surfaces, Interfaces and Bioapplications” was proposed to cover all the aspects related to recent innovations on surfaces, interfaces and bioapplications of polymeric materials. The collected articles show the advances in polymeric materials, which have tremendous applications in agricultural films, food packaging, dental restoration, antimicrobial systems and tissue engineering. We hope that readers will be able to enjoy highly relevant topics that are related to polymers. Therefore, we hope to prove that plastics can be a solution and not a problem.

scholarly journals Biocompatible Materials Based on Plasticized Poly(lactic acid), Chitosan and Rosemary Ethanolic Extract I. Effect of Chitosan on the Properties of Plasticized Poly(lactic acid) Materials

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 941 ◽  
Author(s):  
Cornelia Vasile ◽  
Elena Stoleru ◽  
Raluca Nicoleta Darie-Niţa ◽  
Raluca Petronela Dumitriu ◽  
Daniela Pamfil ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Food Packaging ◽  
Polymeric Materials ◽  
Poly Lactic Acid ◽  
Rosemary Extract ◽  
Antioxidant Compounds ◽  
Innovative Drug ◽  
Melt Mixing

The purpose of the present study is to develop new multifunctional environmentally friendly materials having applications both in medical and food packaging fields. New poly(lactic acid) (PLA)-based multifunctional materials containing additives derived from natural resources like chitosan (CS) and rosemary extract (R) were obtained by melt mixing. Each of the selected components has its own specific properties such as: PLA is a biodegradable thermoplastic aliphatic polyester derived from renewable biomass, heat-resistant, with mechanical properties close to those of polystyrene and polyethylene terephthalate, and CS offers good antimicrobial activity and biological functions, while R significantly improves antioxidative action necessary in all applications. A synergy of their combination, an optimum choice of their ratio, and processing parameters led to high performance antimicrobial/antioxidant/biocompatible/environmentally degradable materials. The polyethylene glycol (PEG)-plasticized PLA/chitosan/powdered rosemary extract biocomposites of various compositions were characterized in respect to their mechanical and rheological properties, structure by spectroscopy, antioxidant and antimicrobial activities, and in vitro and in vivo biocompatibility. Scanning electron microscopy images evidence the morphology features added by rosemary powder presence in polymeric materials. Incorporation of additives improved elongation at break, antibacterial and antioxidant activity and also biocompatibility. Migration of bioactive components into D1 simulant is slower for PEG-plasticized PLA containing 6 wt % chitosan and 0.5 wt % rosemary extract (PLA/PEG/6CS/0.5 R) biocomposite and it occurred by a diffusion-controlled mechanism. The biocomposites show high hydrophilicity and good in vitro and in vivo biocompatibility. No hematological, biochemical and immunological modifications are induced by subcutaneous implantation of biocomposites. All characteristics of the PEG-plasticized PLA-based biocomposites recommend them as valuable materials for biomedical implants, and as well as for the design of innovative drug delivery systems. Also, the developed biocomposites could be a potential nature-derived active packaging with controlled release of antimicrobial/antioxidant compounds.

Determination of zinc in cassava based polymeric materials

2021 ◽  
pp. 089270572110138
Author(s):  
Rada-Mendoza Maite ◽  
Chito-Trujillo Diana ◽  
Hoyos-Saavedra Olga Lucía ◽  
Arciniegas-Herrera Jose Luis ◽  
Molano-Tobar Nancy Janneth
Keyword(s):  
Food Packaging ◽  
Raw Materials ◽  
Polymeric Materials ◽  
Statistical Parameters ◽  
Intermediate Precision ◽  
Flexible Films ◽  
Flame Atomic Absorption ◽  
Zinc Concentrations ◽  
Materials Used

The current trends in biodegradable food packaging include the use of materials such as biopolymers which should be free of toxic metals to ensure their quality and use in multiple applications. However, these samples can contain zinc given its presence in the materials used to make them. In this study, a method to determine the concentration of zinc (Zn) in thermoformed and biodegradable flexible films samples based on Cassava and in their raw materials (flour, starch and fique) using flame-atomic absorption spectroscopy is described. Prior, an acid digestion with nitric acid under reflux was required. The method was standardized by means of the evaluation of statistical parameters. The method was sufficiently lineal ( R2 = 0.999) in a working range from 0.1 to 1.0 mg Zn/L with detection and quantification limits of 0.03 and 0.82 mg/L, respectively. The method was found to be precise and accurate, and could therefore be used to measure Zn content at levels well below safe limits.The precision of the method was evaluated using intermediate precision and repeatability which showed coefficients of variation less than 6.7% and 4.7%, respectively. The percentages of recovery ranged from 96.5% to 98.2%. The method was successfully applied for the determination of Zn in the studied biopolymers samples and the results obtained support the method’s suitability for determining the presence of the metal. Zinc concentrations in thermoformed, flexible films and flour were below 2.36, 2.14 and 2.01 mg/L, respectively, indicating that these polymers could be used for food containers.

scholarly journals Food packaging: usage features and processing

2020 ◽  
Vol 52 (1) ◽  
pp. 54-58
Author(s):  
L.V. Gortseva ◽  
T.P. Kostiuchenko ◽  
T.V. Shutova ◽  
O.S. Martynova ◽  
V.V. Zaval'na ◽  
...  
Keyword(s):  
High Performance ◽  
Food Packaging ◽  
Toxic Elements ◽  
Polymeric Materials ◽  
Food Products ◽  
Component Composition ◽  
Atomic Absorption Spectrophotometry ◽  
Analytical Control ◽  
Toxic Substances ◽  
Level Control

The article deals with the peculiarities of polymer packaging for food products, as well as the possible risks that arise in the process of use and its processing. The Aim of the Article. Determine the toxic substances of the packaging component composition and carry out comprehensive analytical control on the content of priority pollutants to prevent adverse effects on food products, the environment, the human body, and outline the possible risks of polymeric food packaging recycling. Methods and Materials. To identify and define the levels of chemical substances and toxic elements migration from different polymeric material types and products from them. The methods of gas chromatography, high performance liquid chromatography, atomic absorption spectrophotometry, mass-spectrometry were applied using modern validated methods. Results and Discussion. According to the results of the researches, it is established that a large group of chemicals gets from the polymeric packaging to the contacting media, and in some cases their number exceeds the hygienic standard – ANM (acceptable number of migration). The increase in the number of chemicals migrating from the packaging material, as well as the levels of content of new excipients (dyes, decomposition products, impurities) that are formed after recycling of polymeric materials, is evidenced by the results of many research works. Conclusions. Careful monitoring of the migration levels of toxic components from different types of packaging materials and products into contact media should be carried out to assess the risks and their negative effects on food and human health. At the legislative level, control over the processing of plastic packaging for food should also be realized, taking into account the possibility of the formation of new chemicals and toxic elements. Key Words: packaging, safety, food products, risks.

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