| Property | Typical Requirement (Grade example: Type 2) | | :--- | :--- | | | ±10% of nominal (e.g., 0.05 mm, 0.10 mm, 0.20 mm) | | Tensile strength (MD/TD) | ≥ 24.5 MPa (250 kgf/cm²) | | Elongation at break | ≥ 250% (MD/TD) | | Tear strength (JIS K 7128) | ≥ 0.49 N (depending on thickness) | | Impact strength | Specified using the pendulum method | | Water resistance | No water penetration under defined hydrostatic pressure |
Using a "dart drop" or pendulum method, this test determines the film’s ability to absorb energy during a sudden impact, simulating a package being dropped. 5. Shrinkage Factor jis z 1707
Beyond mechanical durability, JIS Z 1707 plays a major role in consumer safety. The standard includes provisions regarding: | Property | Typical Requirement (Grade example: Type