Determination of stretch film properties with hysteresis for freight transport application

In the dynamic world of freight transportation, the use of stretch films plays a crucial role in ensuring the safety and integrity of goods. This study, conducted by Elora Leguebe, a doctoral student at the University of Reims and collaborator at Metropack, France, focuses on the in-depth analysis of the properties of these films, including their behavior under various stresses and their ability to maintain load stability.

Research objectives

The main objective of this research is to determine the properties of stretch films, particularly concerning their hysteresis, elastic recovery, and resistance to permanent deformations. Scientific and technical objectives include evaluating manual and mechanical LLDPE (Linear Low-Density Polyethylene) films, analyzing their stress relaxation, and measuring their stress retention under dynamic stress conditions.

Methodology

The study involved meticulous preparation of LLDPE film samples, adhering to ASTM standards to ensure consistency and reliability of results. Tests included measurements of tension properties, hysteresis, elastic recovery, as well as tear and permanent deformation resistance tests to simulate real freight transport conditions.

Key findings

The results revealed significant differences between manual and mechanically applied stretch films in terms of stress behavior, stress relaxation, and stress retention. The study also highlighted the anisotropic properties of the films and their influence on load stability during transport.

Implications and practical applications

These findings offer important insights for the freight transportation industry. They help guide the selection of stretch films based on their specific properties, thereby optimizing the safety and efficiency of goods transportation. Recommendations from this research can contribute to improving packaging and load securing practices in the sector.

Conclusion

This study provides an in-depth understanding of the properties of stretch films and their impact on safety and efficiency in freight transportation. The results underscore the importance of choosing the appropriate film based on the specific requirements of each transport application, paving the way for future research to further optimize this crucial domain.