How to delay and prevent the aging of PVC heat shrinkable film?

In the process of processing, storage and use, PVC heat shrinkable film will fade, embrittlement and crack aging under the action of light, heat and oxygen. In order to delay and prevent the occurrence of aging phenomenon, a stabilizer must be added to the PVC heat shrinkable film. 

PVC heat shrinkable film is mainly used to prevent heat aging, which is called heat stabilizer; It is mainly used to prevent oxidative aging, which is called antioxidants; Those that are mainly used to prevent photoaging are called light stabilizers, and they are collectively referred to as stabilizers.

The best performing PVC heat shrink film stabilizers available today are methyltin heat stabilizers, which are highly effective for calendering, extrusion, injection and blow molding of rigid polyethylene (PVC). Because of its high safety, it is especially used for packaging high-definition rigid polyethylene products, and at the same time, it is also widely used in aluminum for doors and windows, water pipes, and decorative materials to replace other highly toxic plastic heat stabilizers.