In recent years, we use more and more stretch film in product packaging, so the sales volume of stretch film is also increasing, but most buyers don't know what kind of packaging is the best? Is there any way to know the quality of stretch film at the time of purchase? The following describes in detail how to judge the quality of the winding film.

features:

1. Self adhesive. Self viscosity refers to the viscosity of the wrapped film after contact. This function can ensure that the packaged material is not loose during and after stretching and wrapping. Self adhesion is affected by many external factors, such as humidity, dust, pollutants and so on, which is also an important index to test its quality.

2. Toughness. Toughness refers to the comprehensive performance of the paint film against puncture and tear. The risk value of tear resistance must be horizontal, i.e. perpendicular to the machine operation direction, because tearing in this direction will loosen the package, and the package can remain firm even if longitudinal tearing occurs. Therefore, the better the toughness of the tensile film, the better the quality.

3. Tensile properties. Stretching is the elongation ability of the stretched film after being stressed. The tensile film with good quality will stretch to a certain extent within a certain range.

method:

In actual contact, you can buy it to see its tension. If the tension is large, the quality is good. If the puncture resistance of the stretched film is poor, it is easy to be pierced by sharp objects. Damaged conditions can lead to loose separation of products or goods and cannot be protected. From the point of view of viscosity, this can be used to determine the viscosity of the stretched film.

From the perspective of drawing ratio, we can draw outward from the length of the drawing film, and then from the transverse drawing, which can also judge whether it is good or bad; In addition, if it is too thin to stretch and the stretching film is too hard, it can be seen that the stretching property is not good without.

Observe the gloss to judge. Generally, the color of ordinary stretch film is darker, and a good stretch film is more transparent.