How to judge the quality of stretch film when purchasing?
Stretch film is one of the most popular packaging materials in logistics. Mainly used for the sale and transportation of various commodities. Its main function is to stabilize, hide and maintain merchandise. In short, it should have high puncture resistance, obvious shortening and certain shortening stress.
1. Self-adhesion: Self-adhesion refers to the adhesion of the stretched film after contact. This feature keeps packaged items tight and not loose during stretching and wrapping and after wrapping. Self-adhesion is affected by various external factors, such as humidity, dust and contamination, which is also the main goal to check its quality.
2. Patience: Patience refers to the performance of film-induced tearing and tearing. The value for the risk level for tear resistance must be set to horizontal, i.e. consistent with the direction in which the machine is being operated. Since the package is torn in this direction and becomes loose, the package will still adhere firmly even if it is torn in the longitudinal direction.
3. Stretching: Stretching is the ability of a stretched film to stretch elastically after being stretched. If the quality is good, the length will be extended after stretching, and it will not break within a certain range. It's one of its own characteristics, with this stretch, the cargo packs well.
