How to Optimize Shrink Film Performance Measuring

Measuring the performance of shrink film is vital to verify that the shrink film meets the requirements of various packaging applications. Shrink film's performance is influenced by numerous factors including its thickness, film type, and application technique. Here are the methods to measure the performance of shrink film:

Key Performance Indicators:
Stretch Ratio: One of the crucial performance metrics of shrink film is its stretch ratio, which refers to how far the film can stretch without breaking. To measure the stretch ratio, you need to apply a load to the film at a set velocity and record the deformation of the film. The stretch ratio is calculated by dividing the film's elongated length by its original length.

Tensile Strength: A Critical Test
Tensile strength is another critical parameter for measuring the performance of shrink film. It represents the maximum pressure that the film can withstand before breaking. To measure tensile strength, you need to use a tensile tester to apply a uniform load to the film at a constant rate until it breaks. The tensile strength is calculated by dividing the maximum load by the cross-sectional area of the film.

Addressing Dunnage Compression: A Packaging Problem
Dunnage compression is a common problem associated with shrink film packaging. It occurs when the packaging material does not provide required support for the packaged items. To measure dunnage compression, you can use a dunnage compression tester. The device applies a load to the packaged item through a series of rollers, and the resulting bending of the packaging material is recorded.

Measuring Packaging Stability: A Performance Indicator
Packaging stability is an essential performance parameter for shrink film, particularly for applications involving complexly shaped items. To evaluate packaging stability, you can subject the packaged item to external forces such as temperature changes. The packaged item's stability can be measured by assessing the extent of distortion and the risk of failure.

Shrinkage Percentage: A Key Metric
Shrinkage percentage is the degree to which the film shrinks after cooling or freezing. It is an important parameter to measure the performance of shrink film. The shrinkage percentage is typically measured by cutting a sample of the film and then measuring its length and width before and شیرینگ حرارتی after shrinkage.