How to distinguish the quality of the strtech film?

How to distinguish the quality of the strtech film?

The first is self-adhesion. Judging from the stickiness: This can be done by trying the stickiness with your hands, and you can well judge the stickiness of the stretch film. Self-adhesion refers to the adhesion between the stretched films after contact. During stretch wrapping and after wrapping, the packaged item can be tightened without loosening.

The other is the toughness of the stretch film. Toughness refers to the combined puncture and tear resistance of a film. The critical value of tear resistance must be perpendicular to the direction of machine operation, as tearing in this direction will loosen the package and hold the package firmly even if a longitudinal tear occurs.

Judging by the stretch ratio: we can stretch the stretch film along the length of the film, and then stretch from the transverse direction, which can also be a good judgment of quality; also if it is too thin, the stretch film is tough It doesn't take a test to see that the stretch isn't good.

Judging by observing the gloss: Generally, the ordinary stretch film is darker, and the good stretched film is relatively transparent.