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Extrusion-blown biodegradable food packaging films based on starch, gelatin, and polyester blends: A comprehensive review
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This review summarizes existing research on biodegradable food packaging films made from materials like starch, gelatin, and plant-based plastics, produced using a manufacturing method called extrusion blowing. It describes methods researchers use to improve these films' strength and moisture resistance, and notes that challenges remain in scaling up production affordably.
Growing concerns over plastic pollution have intensified the development of biodegradable films as sustainable alternatives to conventional packaging plastics. Among available manufacturing techniques, extrusion blowing is the most industrially scalable and viable process for producing high-performance films. This review examines recent progress in biodegradable polymers suitable for extrusion blowing, with emphasis on thermoplastic starch (TPS), gelatin, poly(butylene adipate-co-terephthalate) (PBAT), polylactic acid (PLA), and polyhydroxyalkanoates (PHA). Key strategies to address intrinsic limitations such as high hydrophilicity, weak interfacial adhesion, and insufficient mechanical stability include compatibilization, blending, and the incorporation of functional additives. Lipid-based additives improve moisture resistance, nanoparticles enhance mechanical reinforcement, and active agents enable intelligent packaging functionalities. Emerging approaches, such as chemical modification, multilayer and composite structures, further expand opportunities to tailor film performance for food packaging applications. By linking formulation design with processing conditions and end-use performance, this review highlights advances towards scalable and eco-efficient biodegradable films. Despite significant progress, challenges related to large-scale production, cost efficiency, and regulatory alignment remain unresolved. Nevertheless, continued innovation in bio-based and functional materials underscores the strong potential of these films within a circular packaging economy.
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Advances and recent trends in plant-based materials and edible films: a mini-review
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This review highlights recent advances in plant-based packaging materials and edible films made from natural polysaccharides, proteins, and lipids as sustainable alternatives to conventional plastic packaging. Researchers explored how 3D printing and functionalization strategies can enhance the mechanical strength, barrier properties, and shelf-life extension of these materials. The findings point toward a growing toolkit of biodegradable options that could help reduce plastic waste in food packaging.
A Review on Biopolymer-Based Biodegradable Film for Food Packaging: Trends over the Last Decade and Future Research
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This systematic review explores biodegradable packaging made from natural materials like starch and proteins as alternatives to conventional plastics. Reducing plastic packaging is important because traditional plastics break down into microplastics that contaminate food and the environment.
Innovative InterfacialCompatibilization and BlowingStrategies for Advancing PLA/PBAT Blown Films: Enhancing Film BlowingStability, Mechanical Properties, and Barrier Properties
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Scientists found a way to make plant-based, biodegradable plastic film (made from PLA and PBAT) stronger, more flexible, and better at blocking oxygen and moisture—all while keeping it clear enough to see through. By adding a special bonding ingredient during manufacturing, they created a film that performs well enough to replace traditional plastic in food packaging, which matters because it could reduce our reliance on conventional plastics that contribute to pollution and microplastic contamination in food and the environment.
Recent progress in protein-based food packaging films
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Researchers reviewed the state of biodegradable protein-based packaging films derived from animal and plant sources, examining preparation techniques and food applications while identifying smart packaging opportunities that could displace petroleum-based materials and reduce plastic pollution.
Current trends in biopolymers for food packaging: a review
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This review covers the latest developments in biopolymer-based food packaging, including biodegradable films, edible coatings, and active or smart packaging systems. Researchers found that while these sustainable alternatives show promise, they still face challenges in matching the moisture, heat, and barrier properties of conventional petroleum-based plastics. The study highlights ongoing efforts to improve these materials so they can realistically replace traditional plastic packaging.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.