Effect of relaxation time, recovery time and extension speed during characterization of LLDPE wrap film properties

Stabilizing and protecting loads during transportation are crucial aspects of modern logistics. Low-density linear polyethylene (LLDPE) packaging films, known for their use in stretch film, play an essential role in this field. This article explores the properties of these films, focusing on the effect of relaxation time, recovery time, and extension speed on their behavior.

Study methodology

The research utilizes standardized LLDPE film samples prepared according to specific procedures. To evaluate their properties, various characterization methods were applied, allowing for a comprehensive and detailed analysis of the stretch film's mechanical characteristics.

Results and discussions

The study revealed significant insights into the behavior of stretch film under different test conditions. The influence of extension speed showed notable variations in film properties, while the effects of relaxation and recovery time offered interesting perspectives on the film's hysteresis behavior during pallet transportation.

Design of experiments (DOE)

The Design of Experiments (DOE) approach was used to systematize tests and analyze results. This methodology enabled precise conclusions about the relationships between various test parameters and film properties, thus providing practical implications for the transportation and packaging industry.

Conclusion

This study provides essential insights into LLDPE packaging films, particularly regarding their behavior under different mechanical conditions. The results can significantly influence industry practices, optimizing the use of these films for load protection and stabilization during transportation.