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2023-10-05

PBAT/kraft lignin blend in flexible laminated food 鈥?

PBAT stands for Poly(butylene adipate-co-terephthalate), which is a biodegradable polyester that has gained significant attention in recent years due to its potential use as a sustainable alternative to conventional plastics. On the other hand, kraft lignin is a byproduct of the paper pulp industry and is considered as a renewable and abundant biopolymer. This article will discuss the potential of the PBAT/kraft lignin blend in flexible laminated food packaging and its advantages in terms of sustainability and barrier properties.

Flexible laminated food packaging is widely used in the food industry due to its excellent barrier properties against moisture, oxygen, and other external factors that can affect the quality and shelf life of the packaged food. However, most of the current flexible laminated food packaging is made from non-renewable and non-biodegradable materials such as polyethylene and polypropylene, which contribute to environmental pollution and waste accumulation. Hence, there is a growing demand for the development of sustainable and eco-friendly alternatives.

The PBAT/kraft lignin blend shows great potential as a sustainable alternative for flexible laminated food packaging. PBAT is a biodegradable polymer that can be derived from renewable resources such as sugar cane and corn, making it a more sustainable option compared to conventional plastics. Additionally, kraft lignin, which is derived from wood pulp, is also a renewable and abundant resource, further enhancing the sustainability of the blend.

One of the key advantages of the PBAT/kraft lignin blend is its excellent barrier properties. Various studies have shown that the inclusion of kraft lignin in the blend can significantly improve its barrier properties against oxygen and moisture. This is crucial for food packaging, as it helps to protect the food from spoilage and degradation caused by exposure to air and moisture. The enhanced barrier properties of the blend can also help extend the shelf life of the packaged food, reducing food waste and improving overall sustainability.

In addition to its barrier properties, the PBAT/kraft lignin blend also offers advantages in terms of mechanical properties and processability. The blend exhibits good tensile strength and flexibility, making it suitable for flexible packaging applications. It can be easily processed using conventional processing methods such as extrusion and injection molding, further facilitating its commercial production and widespread use in the food industry.

Furthermore, the blend also offers the potential for customization and further improvement through the incorporation of additives and reinforcement materials. For example, the addition of compatibilizers can improve the compatibility between PBAT and kraft lignin, resulting in a more homogeneous blend with enhanced properties. Similarly, the incorporation of nanofillers such as clay nanoparticles can further enhance the barrier properties of the blend, making it an even more attractive option for food packaging applications.

Overall, the PBAT/kraft lignin blend holds great promise as a sustainable alternative for flexible laminated food packaging. Its renewable and biodegradable nature, combined with its excellent barrier properties, mechanical properties, and processability, make it an attractive option for the food industry. The blend can help reduce the environmental impact of food packaging, contribute to the circular economy, and promote a more sustainable future.

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