How to conduct heat treatment of stretch film?

 Nowadays, the reasons why many companies choose stretch film are mostly because of the shrinkage and fixity of stretch film. Because the characteristics of stretch film can be used in the packaging of small items, the shrinkage force of stretch film after stretching is reduced. 

The product is wrapped and packaged so that the packaged product looks compact and does not take up too much space, which can effectively prevent mutual misalignment and movement during transportation.

The production of stretched film requires heat treatment, so how should the stretched film be heat treated?
In the heat treatment process of the stretched film, the workpiece is deformed by cold plasticity, resulting in cold hardening, which will reduce the plasticity of the stretched film, but increase the deformation resistance and hardness. In addition, the mold design is unreasonable, which requires Perform intermediate annealing to soften the metal and restore its plasticity.

Note: It is not necessary to anneal in the general process. After all, it needs to increase the cost. It is necessary to choose between adding processes and increasing annealing, so it needs to be cautious. Annealing generally adopts low temperature annealing, that is, recrystallization annealing. Two points should be paid attention to when annealing, decarburization and oxidation, here is mainly oxidation. After the workpiece is oxidized, there is oxide scale, which makes the effective thickness of the workpiece thinner and increases the wear of the mold.

The above is how the stretch film is heat treated. The content is for your reference only. If you want to know more about the stretch film and the wholesale price of the stretch film, please pay attention to the joypack stretch film manufacturer.