In recent years, we have used more and more wrapping films on product packaging. So the sales volume of stretch film is also increasing, but most buyers do not know what kind of packaging is the best? Is there any way to know the quality of the stretch film at the time of purchase? The following describes in detail how to judge the quality of the stretch wound film.

       The first is self-adhesion. Self-adhesion refers to the adhesion after contact between wound films, which is a characteristic during stretch winding and after wrapping. Can make packing items fasten without loosening. Self-adhesion is affected by many external factors, such as humidity, dust, and pollutants. This is also an important indicator of its quality. The other is the toughness of the stretch wound film. Toughness refers to the comprehensive properties of film resistance to puncture and tear. The danger value of the degree of tear resistance must be horizontal, that is, perpendicular to the machine operating direction. Because tearing in this direction will loosen the package, the package will remain strong even if a longitudinal tear occurs. Therefore, the better the toughness of the wound film, the better the quality.

      There is also another indicator of tensile properties. Stretching is the elongation ability of the wound film after it is stressed. A good quality stretched film will have some extension in length after stretching. And within a certain range.