DIN 53369

Test Materials: The DIN 53369 standard specifies that films used in heat shrinkage tests must be of consistent thickness and made of materials like polyethylene, PVC, or other thermoplastic polymers. The test film should be conditioned under standard conditions before testing.
Test Process: The test involves exposing the film to a specific temperature in an oven for a defined period. The film is then measured for any dimensional changes, particularly shrinkage in length and width, which is critical for understanding the material’s heat resistance properties.
Test Result Interpretation: Test results are interpreted by calculating the percentage of shrinkage in both directions of the film. A high percentage indicates a greater shrinkage under heat, which may be suitable for applications requiring high shrinkage, like packaging, while lower values indicate less shrinkage, suitable for more stable applications.