Five performance data need to know before you buy stretch file

1, Stretching

Stretching is the ability of a film to stretch elastically after tension. Longitudinal stretching increases, eventually thinning the film, shortening the width. While longitudinal stretching is beneficial, excessive stretching is often undesirable. As this will thin the film, tearing, and at the same time increasing the tension applied to the package

2, Toughness

Toughness is the combined nature of the film's puncture and tear resistance. The tear resistance refers only to the degree of tear resistance of the film after it has been tensioned and punctured. The risk of tearing must be horizontal, ie perpendicular to the direction of machine operation, since tearing in this direction will loosen the package, and the package will remain secure even if it is torn longitudinally.

3, Stress retention

Stress retention refers to the extent to which the tension exerted on the film can be maintained during the stretch wrapping process..

4 Stretch to allow

Permissible stretching refers to the maximum stretch that can be applied to maintain the necessary properties for a given application. Allowable stretch varies depending on the application. The larger the allowable stretch, the less the amount of film to use and the lower the packaging cost.

5, self-adhesive

The adhesion after contact between the films, during and after the wrapping, enables the packaged product to be tightened without loosening. Self-adhesive change depends on a variety of external factors

Five performance data need to know before you buy stretch file