Shrinkage stress measurement of plastic films
Isothermal or dynamic measurement, temperature range from 40 to 140° C, MD or TD, including measurement of the contraction force after cooling in accordance with ISO 14616.
In short — AI-generated
This test measures the mechanical force a plastic film exerts when it is heated and attempts to shrink. The film sample is clamped in a device and subjected to a defined temperature profile, either at a constant temperature or with increasing heat, while the resulting tension is recorded in the machine or transverse direction.
The measured shrinkage force indicates how strongly a film will pull on its contents or packaging seals during heat-based processes like shrink-wrapping or sterilization. Packaging developers use these values to ensure that the film provides sufficient tension for a secure fit without deforming or damaging the packaged product.
Text is AI-generated; based on test method data curated and verified by Innoform.