Laboratory Manager - Packaging and Materials, Materials Science and Engineering
United KingdomContact Mark
Free shrinkage tests are used to evaluate the unrestrained linear heat shrinkage of thin plastic films for packaging applications e.g. shrink wrap and shrink sleeve materials.
Heat shrinkage is determined by comparing the dimensions of pre cut samples before and after heating in an oil bath, typically set at 90°C for polyvinyl chloride (PVC) or 115°C for low density polyethylene (LDPE).