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This study examined the post-application behavior of two 20.3 micron machine stretch films, one categorized as high-performance and one as general-performance, for thirty days while stored at either 23°C or 38°C. For each film type, the stretch film was applied to a simulated unit load to produce neutral and positive applied total stretch scenarios. The relaxation curves developed from each test indicate the relaxation rate of the films varied based on the storage condition. Observed was an average of 41% containment loss for both high-performance and general-purpose films when the simulated loads were stored at 38°C. For simulated loads stored at 23°C, the reported average containment loss for both films was 26%. The application of the film, either neutral or positive, did not greatly affect the percent loss in containment for the film. Additionally, results showed the greatest amount of containment force loss occurred during the initial 2 h of storage for all 23°C treated samples and 38°C general-purpose treated samples, while 38°C high-performance films continued to relax for 7 days until no difference was observed.
Dunno, Kyle and Symanski, Maria
"Evaluation of stretch film behavior during long-term storage under different atmospheric conditions,"
Journal of Applied Packaging Research: Vol. 13:
1, Article 3.
Available at: https://scholarworks.rit.edu/japr/vol13/iss1/3