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

Critical Factors:
Stretch Ratio: One of the vital performance metrics of shrink film is its stretch ratio, which refers to how much the film can be stretched without breaking. To measure the stretch ratio, you need to apply a load to the film at a consistent pace and record the deformation of the film. The stretch ratio is calculated by dividing the film's stretched length by its original length.

Testing Tensile Strength: A Performance Parameter
Tensile strength is another critical parameter for measuring the performance of shrink film. It represents the maximum stress 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 set velocity until it breaks. The tensile strength is calculated by dividing the maximum load by the cross-sectional area of the film.

Dunnage Compression: A Common Issue
Dunnage compression is a common problem associated with shrink film packaging. It occurs when the packaging material does not provide adequate 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 distortion 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, شیرینگ پلی اتیلن you can subject the packaged item to external forces such as vibrations. The packaged item's stability can be measured by assessing the extent of distortion and the risk of failure.

Measuring Shrinkage Percentage: An Important Parameter
Shrinkage percentage is the degree to which the film contracts 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 after shrinkage.